Turntable assembly and engineering mechanical equipment

Patent metadata

Field	Value
Publication number	US-12559900-B2
Application number	US-202318546307-A
Country	US
Kind code	B2
Filing date	Jan 5, 2023
Priority date	Nov 22, 2022
Publication date	Feb 24, 2026
Grant date	Feb 24, 2026

Abstract

The present disclosure relates to a turntable assembly and an engineering mechanical equipment. A turntable assembly for an engineering mechanical equipment includes: a turntable body; a first rotating mechanism connected to the turntable body and configured to cause the turntable body to rotate relative to an undercarriage of the engineering mechanical equipment; and a second rotating mechanism connected to the turntable body and configured to cause an upper work device of the engineering mechanical equipment to rotate relative to the turntable body. An axis of rotation of the first rotating mechanism is not co-linear with an axis of rotation of the second rotating mechanism. The second rotating mechanism includes a rotating body for connecting the upper work device. At least two hinge points arranged spaced apart along the axis of rotation of the second rotating mechanism are provided between the rotating body and the turntable body.

First claim

What is claimed is:

1 . A turntable assembly for an engineering mechanical equipment, the turntable assembly comprising:
a turntable body; a first rotating mechanism connected to the turntable body and configured to cause the turntable body to rotate relative to an undercarriage of the engineering mechanical equipment; and a second rotating mechanism connected to the turntable body and configured to cause an upper work device of the engineering mechanical equipment to rotate relative to the turntable body; a first fixing plate located on a top plate of the turntable body and fixed relative to the turntable body; a second fixing plate located on an upper side of the first fixing plate and fixed relative to the turntable body; and a pressing mechanism arranged on the turntable body and configured to press a rotating body against a surface of the first fixing plate so that the rotating body remains in surface contact with the first fixing plate when rotating relative to the first fixing plate, wherein an axis of rotation of the first rotating mechanism is not co-linear with an axis of rotation of the second rotating mechanism; wherein the second rotating mechanism comprises the rotating body for connecting the upper work device; and wherein at least two hinge points arranged spaced apart along the axis of rotation of the second rotating mechanism are provided between the rotating body and the turntable body; the rotating body is connected to the first fixing plate and the second fixing plate respectively by means of hinge shafts, and wherein the rotating body is in surface contact with the first fixing plate; and wherein one of:
(i) the second rotating mechanism further comprises a rotating pin shaft, which is fixedly connected to the rotating body by means of a locking pin, so that the rotating body is caused to rotate by rotation of the rotating pin shaft, and wherein the pressing mechanism comprises: a plurality of pressing pin shafts connected to the rotating pin shaft; and a plurality of pressing oil cylinders located on a side of the top plate of the turntable body away from the rotating body and respectively connected to the plurality of pressing pin shafts, and configured to respectively cause the plurality of pressing pin shafts to move by movement of piston rods, so that the rotating pin shaft applies an acting force toward the first fixing plate on the rotating body, through the locking pin; and
(ii) the rotating body comprises a rotating seat, which has a bottom in surface contact with the first fixing plate, and a bottom of the rotating seat has a circumferential flange, wherein the pressing mechanism comprises: an oil cylinder mounting bracket arranged on the top plate of the turntable body; and a plurality of pressing oil cylinders mounted on the oil cylinder mounting bracket and configured to press the circumferential flange downward by movement of piston rods.

2 . The turntable assembly according to claim 1 , wherein the top plate has a first fixing hole, and the first fixing plate has a second fixing hole aligned with a center of the first fixing hole; and wherein the second rotating mechanism further comprises a rotating pin shaft, which passes through the first fixing hole and the second fixing hole and is fixedly connected to the rotating body by means of a locking pin, so that the rotating body is caused to rotate by rotation of the rotating pin shaft.

3 . The turntable assembly according to claim 2 , wherein the second rotating mechanism further comprises a slewing driver, which is located on a side of the top plate away from the first fixing plate, wherein a base of the slewing driver is fixedly connected to the first fixing plate or the top plate, and wherein a rotating bearing of the slewing driver is fixedly connected to the rotating pin shaft.

4 . The turntable assembly according to claim 2 , further comprising:
a first rib plate fixedly connected to the top plate; and a second rib plate fixedly connected to the top plate, wherein the first rib plate and second rib plate are located on two sides of the first fixing hole respectively.

5 . The turntable assembly according to claim 4 , wherein the second fixing plate is fixedly connected to a side wall of the first rib plate adjacent to the first fixing hole.

6 . The turntable assembly according to claim 2 , wherein the rotating body comprises:
a rotating seat having a mounting hole for inserting the rotating pin shaft and a bottom in surface contact with the first fixing plate; and paired lug plates formed integrally with the rotating seat, wherein the second fixing plate is located between the paired lug plates and is articulated to the paired lug plates.

7 . The turntable assembly according to claim 6 , wherein the bottom of the rotating seat has a circumferential flange, and wherein the diameter of the circumferential flange is larger than that of the first fixing plate.

8 . The turntable assembly according to claim 1 , wherein the first fixing plate is fixedly connected to the top plate.

9 . The turntable assembly according to claim 1 , wherein in case (i), the plurality of pressing oil cylinders are arranged at equal angular intervals along a circumferential direction of the turntable body.

10 . The turntable assembly according to claim 1 , further comprising:
a locking mechanism arranged on the turntable body and configured to lock the rotating body at at least one rotational position.

11 . The turntable assembly according to claim 10 , wherein the locking mechanism comprises at least one of a hydraulic oil cylinder locking mechanism and a mechanical locking mechanism.

12 . The turntable assembly according to claim 11 , wherein the hydraulic oil cylinder locking mechanism comprises a locking oil cylinder arranged on a side of the top plate of the turntable body away from the rotating body, wherein the rotating body has at least one locking hole, and wherein the locking oil cylinder is configured to implement inserted fixation of the at least one locking hole by movement of a piston rod.

13 . The turntable assembly according to claim 11 , wherein the mechanical locking mechanism comprises a locking plate, a spring, a fixing pin shaft and a flexible shaft drawstring, wherein the locking plate is articulated to the top plate by the fixing pin shaft, wherein the spring is connected between the locking plate and the top plate, for resetting the locking plate to a position of abutting against the rotating body to achieve positional locking of the rotating body, and wherein the flexible shaft drawstring is connected to the locking plate ( 821 ), for dragging the locking plate to rotate around the fixing pin shaft when subjected to a pulling force, so that the locking plate leaves the position of abutting against the rotating body to release the positional locking of the rotating body.

14 . The turntable assembly according to claim 1 , wherein a distance from the axis of rotation of the first rotating mechanism to a center of the turntable body is less than a distance from the axis of rotation of the second rotating mechanism to the center of the turntable body.

15 . An engineering mechanical equipment comprising the turntable assembly of claim 1 .

16 . The engineering mechanical equipment according to claim 15 , wherein the engineering mechanical equipment is an excavator, a crane, or a backhoe loader.

Assignees

• Jiangsu Xcmg Construction Machinery Res Institute Ltd

Inventors

• Liu Xiaocheng
• Geng Yanbo
• Zhang Hongyu

Classifications

• E02F9/006

  Pivot joint assemblies (in general F16C11/04) · CPC title

• E02F9/125

  Locking devices · CPC title

• E02F9/121

  Turntables, i.e. structure rotatable about 360° · CPC title

• E02F3/384 Primary

  the boom being pivotable relative to the frame about a vertical axis · CPC title