Rotating mechanism for hydraulic wrist

Abstract

The utility model discloses a rotating mechanism used on a hydraulic wrist, and relates to the technical field of excavator accessories, the rotating mechanism comprises a rotating body and a connecting body, the rotating body is detachably connected with the connecting body, the rotating body comprises a bottom shell, at least one hinge seat is arranged on the bottom shell, a connecting frame is hinged to the hinge seat, and a front shaft and a rear shaft are arranged on the connecting frame in parallel; an inner ring is installed on the side, close to the connecting body, of the bottom shell, a cylindrical gear is rotationally arranged on the inner ring, at least one driving motor is arranged at one end of the bottom shell and acts synchronously, a driving gear is arranged at the output end of the driving motor, and the driving gear is meshed with the cylindrical gear to drive the connecting body to rotate; according to the double-drive hydraulic wrist, the double-drive motor is arranged on the bottom shell, so that the torque to a connecting body is increased, meanwhile, the width of the whole hydraulic wrist is reduced, interference with external objects is avoided, and the double-drive hydraulic wrist is suitable for being used in the field of hydraulic engineering. And operation in a narrow space is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of excavator attachments, in particular to a rotating mechanism used on a hydraulic wrist. Background Art

[0002] The universal connector, also known as the hydraulic wrist, is installed between the excavator's arm and bucket, and uses the extension and retraction of the cylinder to achieve angular swing function.

[0003] Current hydraulic wrists all achieve 360° rotation through the transmission of a motor and a worm gear. However, this connection method has the same problem: the use of a worm gear will increase the size and height of the entire hydraulic wrist. When working in some narrow spaces, the width of the hydraulic wrist is limited, resulting in the bucket being unable to reach the working surface.

[0004] Existing comparative document 1, a utility model patent with publication number CN 221001192 U and publication date of May 24, 2024, discloses a quick-connect device for a tank cleaning excavator and its accessories, comprising a connecting seat, a swinging seat, a swinging drive device, a rotating seat, a rotation drive device, and a clamp; the connecting seat is used to connect to the excavator; the swinging seat is swingably connected to the connecting seat; the swinging drive device is used to drive the swinging seat and the connecting seat to swing relative to each other; the rotating seat is rotatably connected to the swinging seat; the rotation drive device is used to drive the rotating seat and the swinging seat to rotate relative to each other; the clamp is used to clamp the tank cleaning accessories, and the clamp is located on the rotating seat;

[0005] This patented device uses a clamp to hold various tank cleaning accessories, achieving multiple functions in one machine. It also enables universal tank cleaning through swinging and rotating, achieving a high degree of automation and improving tank cleaning efficiency.

[0006] However, the connector in this patent has the above-mentioned technical problems. In this patent, the drive motor 51 is installed on the side wall of the connector. In this way, when the connector is connected to the bucket, when the connector is rotated as a whole, the drive motor will collide with other objects on the scene, increasing the chance of damage. At the same time, installing the drive motor on the side wall will further increase the width of the entire connector, making it impossible to operate in a narrow space.

[0007] Next, there is comparative document 2, a utility model patent with publication number CN 221095248 U and publication date June 7, 2024, which discloses a quick-change connector with a rotating structure, including a quick-change connector body, the top surfaces of the front and rear side panels of which are fixed with a fixed base plate of a rotating mechanism, a rotating motor being installed in the rotating mechanism, a rotating gear being fixed to the output shaft of the rotating motor, and the rotating gear being meshed with a transmission gear fixed on the fixed base plate; a rotary joint being installed on the rotating mechanism, the oil return pipe of the rotary joint being connected to the oil outlet of the oil cylinder of the quick-change connector body through a connecting pipe, and the oil outlet pipe of the rotary joint being connected to the oil inlet of the oil cylinder of the quick-change connector body through a connecting pipe;

[0008] This patent achieves 360-degree rotation of the quick-change connector body, allowing the bucket fixed thereon to rotate and change the digging direction, meeting operational needs and making it more flexible to use. Meanwhile, Reference Document 2 also sets the drive motor inside the body, solving the problems existing in Reference Document 1 and reducing the overall width of the connector. This prevents the drive motor from colliding with external objects during rotation, reducing the chance of damage to the drive motor, and also allows the bucket to enter narrow spaces for operation.

[0009] Comparative Document 2 solves the problems existing in Comparative Document 1, but new technical problems arise: 1. When the entire connector uses one drive motor, its effective torque is very limited. When there is a load in the bucket, it is very difficult and inefficient to rotate the bucket through a drive motor. If a high-power drive motor is configured, the height and weight of the entire connector will increase, and the increase in height will weaken the overall torque and bearing capacity.

[0010] Therefore, there is an urgent need for a rotating mechanism for a hydraulic wrist, which can increase the torque of the hydraulic wrist while enabling the entire hydraulic wrist to operate in a narrow space and improve its applicability. Utility Model Content

[0011] In response to the above technical problems, the present invention provides a rotation mechanism for a hydraulic wrist, which is used to solve the problems of the existing hydraulic wrist being limited by the overall width and insufficient torque when operating in a narrow space.

[0012] The above technical objectives of the present invention are achieved through the following technical solutions:

[0013] A rotary mechanism for a hydraulic wrist, comprising a rotary body and a connector, characterized in that the rotary body and the connector are detachably connected, the rotary body comprising a bottom shell, the bottom shell being provided with at least one hinged seat, the hinged seat being hingedly connected to a connecting frame, the connecting frame being provided with a front axle and a rear axle in parallel;

[0014] An inner ring is installed on the side of the bottom shell close to the connector, and a cylindrical gear is rotatably provided on the inner ring. At least one drive motor is vertically provided at one end of the bottom shell. The drive motors operate synchronously, and a drive gear is provided at the output end of the drive motor. The drive gear meshes with the cylindrical gear to drive the connector to rotate.

[0015] A left swing cylinder and a right swing cylinder are hinged on both sides of the bottom shell respectively, and cylinder bodies of the left swing cylinder and the right swing cylinder are hinged on both sides of the connecting frame respectively.

[0016] Furthermore, a connecting plate is provided on a side of the connecting body close to the rotating body, and the connecting plate is bolted to the cylindrical gear.

[0017] Furthermore, a protective cover is detachably mounted on the bottom shell at the position of the driving motor.

[0018] Furthermore, the protective cover is arranged along the structural path of the bottom shell.

[0019] Furthermore, the height of the protective cover is greater than the height of the driving motor.

[0020] Furthermore, the depth of the bottom shell is greater than the thickness of the cylindrical gear.

[0021] In summary, the beneficial technical effects of the present invention are:

[0022] (1) By vertically setting the drive motor on the bottom shell instead of the original side wall setting, the width of the entire hydraulic wrist is further reduced, so that the bucket can be placed in a narrow space for operation, avoiding the interference of the drive motor with other objects and improving the applicability of the entire hydraulic wrist. At the same time, by replacing the original worm gear with the drive gear and the cylindrical gear, the overall height of the hydraulic wrist is reduced and the distance between the upper and lower shafts is shortened. At the same time, by replacing the large-volume motor with a dual drive motor, the torque of the entire hydraulic wrist is enhanced, thereby improving the applicability.

[0023] (2) The protective cover can provide protection for the two drive motors, further preventing the drive motors from colliding with foreign objects and reducing the chance of damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0025] Figure 2 yes Figure 1 Schematic diagram from another angle;

[0026] Figure 3 It is a schematic diagram of the coordination between the rotating body and the connecting body;

[0027] Figure 4Schematic diagram of the connection frame and the bottom shell;

[0028] Figure 5 This is a schematic diagram of the bottom case from another angle.

[0029] Figure numerals: 1. rotating body; 2. connecting body; 3. bottom shell; 4. articulated seat; 5. connecting frame; 6. front axle; 7. rear axle; 8. left swing cylinder; 9. right swing cylinder; 10. driving motor; 11. protective cover; 12. inner ring; 13. cylindrical gear; 14. driving gear; 15. connecting plate; 16. front tiger's mouth; 17. rear tiger's mouth. DETAILED DESCRIPTION

[0030] The present invention will be described clearly and completely below with reference to the embodiments.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] In the description of the embodiments, unless otherwise specified or limited, the terms "disposed" and "connected" should be understood broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct connections, connections through an intermediary medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on their specific circumstances.

[0033] See attached Figure 1-5 , shown is a rotating mechanism for a hydraulic wrist, comprising a rotating body 1 and a connecting body 2, wherein the rotating body 1 comprises a bottom shell 3, on which two articulated seats 4 are fixedly provided in parallel, the bottom shell 3 being hingedly connected to a connecting frame 5 via the articulated seats 4, the connecting frame 5 being provided with a front axle 6 and a rear axle 7, and a left swing cylinder 8 and a right swing cylinder 9 being hingedly connected on both sides of one end of the bottom shell 3, respectively. During operation, the bucket and other attachments are controlled by the left swing cylinder 8 and the right swing cylinder 9 to complete angle adjustment, and the cylinder bodies of the left swing cylinder 8 and the right swing cylinder 9 are both hingedly connected to the connecting frame 5;

[0034] Two drive motors 10 are vertically installed at the other end of the bottom shell 3. The two drive motors 10 act synchronously. The output end of the drive motor 10 is located in the bottom shell 3 and is provided with a drive gear 14. At the same time, the bottom shell 3 is provided with an inner ring 12 on one side of the drive gear 14 by bolts. A cylindrical gear 13 is rotatably provided on the inner ring 12. The cylindrical gear 13 is engaged with the drive gear 14. During operation, the drive motor 10 utilizes the drive gear 14 to engage and drive the cylindrical gear 13 to rotate around the inner ring 12. It can be seen that the engagement of the drive gear 14 and the cylindrical gear 13 replaces the transmission gear 1. The traditional worm gear reduces the overall height of the hydraulic wrist, making its torque and bearing capacity stronger. At the same time, the dual drive motors 10 are vertically arranged on the bottom shell 3, which not only replaces the original side wall installation and avoids the collision of the drive motors 10 with foreign objects when the hydraulic wrist rotates as a whole, but also increases the torque when the hydraulic wrist drives the connector 2 to rotate, making it more flexible and efficient. More importantly, the vertical installation of the drive motors 10 reduces the overall width of the hydraulic wrist, further narrowing the width difference between it and the bucket, reducing interference when working in narrow spaces.

[0035] Furthermore, a protective cover 11 is installed at the position of the drive motor 10 by bolts on the bottom shell 3. The height of the protective cover 11 is greater than the height of the drive motor 10, and the height difference between the two is 12 mm. In this way, the protective cover 11 further protects the drive motor 10.

[0036] At the same time, a connecting plate 15 is provided on the side of the connecting body 2 close to the rotating body 1. The connecting body 2 is an integral cast structure. The connecting body 2 is bolted to the cylindrical gear 13 through the connecting plate 15. During operation, the cylindrical gear 13 is driven to rotate by the driving motor 10, and the cylindrical gear 13 further drives the connecting body 2 to rotate.

[0037] It should be noted that in the present invention, the model of the drive motor 10 is MT500, and the two drive motors 10 are provided with a valve group, which adopts a double balance valve and a double overflow valve to limit the pressure for forward and reverse rotation, close the oil channel, and play the role of limit locking and protecting the motor seal. The dual motors are connected by parallel oil pipes, and are synchronously turned on and off, to play a dual drive function.

[0038] It should be noted that the inner ring 12 and the cylindrical gear 13 form a combined structure, and the structure thereof is the same as that of the existing product support bearing.

[0039] When in use, the connection with the excavator's arm is achieved through the front axle 6 and the rear axle 7 on the connecting frame 5, and the connection with accessories such as the bucket is achieved through the front tiger's mouth 16 and the rear tiger's mouth 17 on the connecting body 2. When working, the driving gear 14 is used to drive the cylindrical gear 13 to rotate through the synchronous action of the dual drive motors 10, and the cylindrical gear 13 further drives the connecting body 2 and the bucket to rotate. While rotating, the left swing cylinder 8 and the right swing cylinder 9 are used to drive the bucket to achieve angle adjustment. During this period, since the drive motor 10 is vertically installed on the bottom shell 3, it can operate in a narrow space as wide as the bucket, further improving the applicability of the entire hydraulic wrist.

[0040] The above description is only a preferred specific embodiment of the present invention and does not limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A rotary mechanism for a hydraulic wrist, comprising a rotary body (1) and a connecting body (2), characterized in that: The rotating body (1) and the connecting body (2) are detachably connected. The rotating body (1) comprises a bottom shell (3). The bottom shell (3) is provided with at least one hinge seat (4). A connecting frame (5) is hingedly connected to the hinge seat (4). A front axle (6) and a rear axle (7) are provided in parallel on the connecting frame (5). An inner ring (12) is installed on one side of the bottom shell (3) close to the connecting body (2), and a cylindrical gear (13) is rotatably provided on the inner ring (12). At least one driving motor (10) is vertically provided at one end of the bottom shell (3), and the driving motor (10) operates synchronously. A driving gear (14) is provided at the output end of the driving motor (10), and the driving gear (14) is engaged with the cylindrical gear (13) to drive the connecting body (2) to rotate. A left swing cylinder (8) and a right swing cylinder (9) are respectively hinged on both sides of the bottom shell (3); the cylinder bodies of the left swing cylinder (8) and the right swing cylinder (9) are respectively hinged on both sides of the connecting frame (5).

2. The rotary mechanism for a hydraulic wrist according to claim 1, characterized in that: A connecting disc (15) is provided on one side of the connecting body (2) close to the rotating body (1), and the connecting disc (15) is bolted to the cylindrical gear (13).

3. The rotary mechanism for a hydraulic wrist according to claim 1, characterized in that: The bottom shell (3) is located at the position of the driving motor (10) and is detachably mounted with a protective cover (11).

4. The rotary mechanism for a hydraulic wrist according to claim 3, characterized in that: The protective cover (11) is arranged along the structural path of the bottom shell (3).

5. The rotary mechanism for a hydraulic wrist according to claim 3, characterized in that: The height of the protective cover (11) is greater than the height of the driving motor (10).

6. The rotary mechanism for a hydraulic wrist according to claim 1, characterized in that: The depth of the bottom shell (3) is greater than the thickness of the cylindrical gear (13).

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