Anti-shearing mechanism for torque arm of speed reducer

Abstract

The utility model relates to the technical field of anti-shearing mechanisms, in particular to a speed reducer torsion arm anti-shearing mechanism which comprises an end beam and a driving assembly arranged on the end beam, the driving assembly comprises a driving wheel assembly, a speed reducer and a servo motor, the driving wheel assembly is fixed on the end beam, and the speed reducer is fixed on the end beam. The output end of the speed reducer is in transmission connection with the driving wheel assembly, the output end of the servo motor is in transmission connection with the input end of the speed reducer, the speed reducer is fixedly connected with the end beam through a screw, and the axis of the output end of the servo motor is parallel to the axis of the screw. The axis of the output end of the servo motor is parallel to the axial direction of the screw, so that the axial acting force along the output shaft of the motor generated by frequent start and stop and rapid acceleration of the servo motor acts on the axial direction of the screw, and the influence of periodic shearing force on the screw caused by the rapid acceleration of start and stop of the servo motor is reduced; therefore, the structure of the screw can be kept stable when the screw is subjected to shearing force.

Description

TECHNICAL FIELD

[0001] The utility model relates to shear resistance mechanism technical field especially is involved in the shear resistance mechanism of speed reducer torsional arm. BACKGROUND

[0002] In the field of industrial machinery, robots have been widely used in various production links due to their high efficiency, not only effectively reducing the labor intensity, but also significantly improving the production efficiency. In the traditional robot structure, the driving assembly is the core transmission unit, which is composed of the driving wheel assembly on the end beam and the speed reducer. The input end of the speed reducer is connected to the driving motor through a flange, and the output end of the speed reducer is connected to the driving wheel assembly through a transmission shaft to realize power transmission. At the same time, the speed reducer is fixed on the end beam by screw fastening. However, in actual working conditions, the alternating load along the output shaft of the driving motor caused by frequent start-stop and sudden acceleration of the driving motor will cause structural problems in the screw connection between the speed reducer and the end beam. First, the periodic shear stress on the screw caused by the output shaft axial mechanical vibration caused by the impact of the driving motor start-stop and sudden acceleration will cause metal fatigue in the traditional screw connection part. Second, the rigid connection between the speed reducer and the end beam lacks effective shock absorption design, which aggravates the stress concentration phenomenon. These structural defects together increase the risk of fastener fracture, not only shortening the service life of the equipment, but also increasing the operating cost due to unplanned downtime maintenance. SUMMARY

[0003] The technical problem to be solved by the utility model is to solve the problem of periodic shear stress on the screw caused by the output shaft axial mechanical vibration of the driving motor, which causes metal fatigue in the traditional screw and increases the risk of fastener fracture, not only shortening the service life of the equipment, but also increasing the operating cost due to unplanned downtime maintenance. Therefore, a speed reducer torsional arm shear resistance mechanism is provided.

[0004] The utility model discloses a technical scheme that solves its technical problem is: a reducer torsional arm anti -shear mechanism, including end beam and the drive assembly of setting on end beam, the drive assembly includes drive wheel subassembly, reducer and servo motor, drive wheel subassembly is fixed on end beam, the output of reducer is transmission connection with drive wheel subassembly, the output of servo motor is transmission connection with the input of reducer, the mutual fixed connection of screw is passed through between reducer and end beam, the axis of servo motor output and the axis of screw are mutually parallel arrangement. Compared with prior art, the axis of servo motor output and the axis of screw are mutually parallel arrangement, make servo motor frequent start -stop and the along motor output shaft axial force that can produce of urgent acceleration acts on screw axial, reduce the influence that screw is received periodic shearing force that servo motor start -stop urgent acceleration caused, to ensure that screw can keep stable when the structure of self when being affected by shearing force.

[0005] In order to realize the fixed between end beam and reducer, preferably some embodiments still include connecting plate and connecting seat, the connecting plate is fixed on the reducer, the connecting seat is fixed on the end beam, the first through -hole is set up on the connecting plate, the second through -hole is set up on the connecting seat, the first through -hole and second through -hole are correspondingly arranged, one end of the screw passes through the first through -hole and second through -hole and is connected with the nut thread.

[0006] In order to guarantee that the screw is fixed stable and reliable, preferably some embodiments, the connecting seat is located the top of connecting plate, the first elastic sheet and first flat washer are installed between the screw and connecting seat.

[0007] In order to guarantee that the screw is fixed stable and reliable, preferably some embodiments, the first washer is installed between the connecting plate and connecting seat, and the first washer is sleeved on the screw.

[0008] In order to guarantee that the screw is fixed stable and reliable, preferably some embodiments, the second washer is installed between the nut and connecting plate, and the second washer is sleeved on the screw.

[0009] In order to guarantee that the screw is fixed stable and reliable, preferably some embodiments, the second elastic sheet and second flat washer are installed between the screw and second washer.

[0010] Preferably some embodiments, the connecting plate includes first plate and second plate, the second plate is fixed perpendicularly on the side of first plate, the first plate and second plate are fixedly connected with first reinforcing plate, the first plate is used for fixed connection with reducer, and the first through -hole is set up on the second plate.

[0011] In some preferred embodiments, the connecting seat includes a third plate and a fourth plate, the fourth plate being vertically fixed to one side of the third plate, a second reinforcing plate being fixedly connected between the third plate and the fourth plate, the third plate being used for fixed connection with the end beam, and the second through hole being formed on the fourth plate.

[0012] The beneficial effects of this utility model are as follows: When the reducer torque arm anti-shear mechanism of this utility model is used, by setting the axis of the output end of the servo motor parallel to the axis of the screw, the axial force along the output shaft of the motor generated by the frequent start-stop and rapid acceleration of the servo motor is applied to the axial direction of the screw. This reduces the impact of the periodic shear force on the screw caused by the rapid acceleration and stop of the servo motor, ensuring that the screw can maintain its structural stability when subjected to shear force. This avoids the periodic shear stress on the screw caused by the mechanical vibration of the output shaft of the drive motor caused by the start-stop impact of the existing robot, which leads to metal fatigue of traditional screws and increases the risk of fastener breakage. This not only shortens the service life of the equipment, but also significantly increases the operating cost due to unplanned downtime maintenance. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0015] Figure 2 yes Figure 1 A magnified view of part A in the image;

[0016] Figure 3 This is the front view of this utility model;

[0017] Figure 4 This is a top view of the present invention;

[0018] Figure 5 yes Figure 3 BB section view;

[0019] Figure 6 yes Figure 5 A magnified view of part C.

[0020] In the diagram: 1. End beam, 2. Drive assembly, 3. Active wheel assembly, 4. Reducer, 5. Servo motor, 6. Screw, 7. Connecting plate, 8. Connecting seat, 9. First through hole, 10. Second through hole, 11. First spring, 12. First flat washer, 13. First gasket, 14. Second gasket, 15. Second spring, 16. Second flat washer, 17. First plate, 18. Second plate, 19. First reinforcing plate, 20. Third plate, 21. Fourth plate, 22. Second reinforcing plate, 23. Nut. Detailed Implementation

[0021] The utility model makes further detailed description below combining with the embodiment:

[0022] The utility model is not limited to the following specific embodiments, the person skilled in the art can adopt other various specific embodiments to implement the utility model according to the content disclosed in the utility model, or any design structure and idea using the utility model, simple change or change, all fall within the protection scope of the utility model. It needs to be explained that in the case of no conflict, the embodiment in the utility model and the features in the embodiment can be combined with each other.

[0023] In the description of the utility model, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or positional relationship shown based on the drawing, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0024] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected, can be mechanical connection, can also be electrical connection, can be directly connected, can also be indirectly connected through intermediate medium, can be the communication inside two elements. For the person skilled in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances.

[0025] As Figures 1-6As shown, a kind of reducer torsion arm shear resistance mechanism, including end beam 1, connecting plate 7 and connecting seat 8, end beam 1 is provided with driving assembly 2, driving assembly 2 includes driving wheel assembly 3, reducer 4 and servo motor 5, driving wheel assembly 3 is fixed on end beam 1, the output end of reducer 4 is connected with driving wheel assembly 3, the output end of servo motor 5 is connected with the input end of reducer 4, the axis of the output end of servo motor 5 and the axis of screw 6 are arranged parallel to each other, connecting plate 7 is fixed on reducer 4, the connecting seat 8 is fixed on end beam 1, first through-hole 9 is formed in connecting plate 7, second through-hole 10 is formed in connecting seat 8, first through-hole 9 and second through-hole 10 are correspondingly arranged, one end of screw 6 passes through first through-hole 9 and second through-hole 10 and is connected with nut 23 in screw thread, realizes that reducer 4 and end beam 1 are fixedly connected by screw 6,

[0026] Connecting seat 8 is located above connecting plate 7, first elastic sheet 11 and first flat washer 12 are installed between screw 6 and connecting seat 8, first gasket 13 is installed between connecting plate 7 and connecting seat 8, first gasket 13 is sleeved on screw 6, second gasket 14 is installed between nut 23 and connecting plate 7, second gasket 14 is sleeved on screw 6, second elastic sheet 15 and second flat washer 16 are installed between screw 6 and second gasket 14.

[0027] Connecting plate 7 includes first plate 17 and second plate 18, second plate 18 is vertically fixed on the side surface of first plate 17, first plate 17 and second plate 18 are fixedly connected with first reinforcing plate 19, first plate 17 is used to be fixedly connected with reducer 4, and first through-hole 9 is formed in second plate 18.

[0028] Connecting seat 8 includes third plate 20 and fourth plate 21, fourth plate 21 is vertically fixed on the side surface of third plate 20, third plate 20 and fourth plate 21 are fixedly connected with second reinforcing plate 22, third plate 20 is used to be fixedly connected with end beam 1, and second through-hole 10 is formed in fourth plate 21.

[0029] The above-mentioned reducer torsion arm shear resistance mechanism is used, the axis of the output end of servo motor 5 and the axis of screw 6 are arranged parallel to each other, the shear force formed by the original frequent start-stop servo motor 5 output end to screw 6 is changed from the radial direction of screw 6 to the axial direction of screw 6, the influence of the axial impact load generated by servo motor 5 output end on screw 6 is greatly reduced, the screw 6 is tightly fastened to ensure that reducer 4 and end beam 1 are stable and reliable, therefore, in the state of frequent start-stop, sudden acceleration, sudden stop and the like of servo motor 5, the influence of shear force on screw 6 is greatly reduced, the risk of screw 6 fatigue fracture is reduced, the service life of the equipment is improved, and the maintenance cost of the equipment is reduced.

[0030] The above ideal embodiment of the utility model is an inspiration, and through the above description, relevant staff can make various changes and modifications without deviating from the technical idea of the utility model. The technical scope of the utility model is not limited to the content in the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. A reducer torque arm anti-shear mechanism, comprising an end beam (1) and a drive assembly (2) disposed on the end beam (1), the drive assembly (2) comprising a drive wheel assembly (3), a reducer (4) and a servo motor (5), the drive wheel assembly (3) being fixed on the end beam (1), the output end of the reducer (4) being drivenly connected to the drive wheel assembly (3), the output end of the servo motor (5) being drivenly connected to the input end of the reducer (4), the reducer (4) and the end beam (1) being fixedly connected to each other by screws (6), characterized in that: The axis of the output end of the servo motor (5) is set parallel to the axis of the screw (6).

2. The reducer torque arm anti-shear mechanism according to claim 1, characterized in that: It also includes a connecting plate (7) and a connecting seat (8). The connecting plate (7) is fixed on the reducer (4), and the connecting seat (8) is fixed on the end beam (1). The connecting plate (7) has a first through hole (9), and the connecting seat (8) has a second through hole (10). The first through hole (9) and the second through hole (10) are set correspondingly. One end of the screw (6) passes through the first through hole (9) and the second through hole (10) and is threadedly connected to the nut (23).

3. The reducer torque arm anti-shear mechanism according to claim 2, characterized in that: The connecting seat (8) is located above the connecting plate (7), and a first spring (11) and a first flat washer (12) are installed between the screw (6) and the connecting seat (8).

4. The reducer torque arm anti-shear mechanism according to claim 3, characterized in that: A first washer (13) is installed between the connecting plate (7) and the connecting seat (8), and the first washer (13) is sleeved on the screw (6).

5. The reducer torque arm anti-shear mechanism according to claim 4, characterized in that: A second washer (14) is installed between the nut (23) and the connecting plate (7), and the second washer (14) is fitted onto the screw (6).

6. The reducer torque arm anti-shear mechanism according to claim 5, characterized in that: A second spring (15) and a second flat washer (16) are installed between the screw (6) and the second washer (14).

7. The reducer torque arm anti-shear mechanism according to any one of claims 3-6, characterized in that: The connecting plate (7) includes a first plate (17) and a second plate (18). The second plate (18) is vertically fixed to one side of the first plate (17). A first reinforcing plate (19) is fixedly connected between the first plate (17) and the second plate (18). The first plate (17) is used to be fixedly connected to the reducer (4). The first through hole (9) is opened on the second plate (18).

8. The reducer torque arm anti-shear mechanism according to any one of claims 3-6, characterized in that: The connecting seat (8) includes a third plate (20) and a fourth plate (21). The fourth plate (21) is vertically fixed on one side of the third plate (20). A second reinforcing plate (22) is fixedly connected between the third plate (20) and the fourth plate (21). The third plate (20) is used to fixally connect with the end beam (1). The second through hole (10) is opened on the fourth plate (21).

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