Input shaft connecting structure of a cycloid speed reducer

Abstract

The utility model relates to the technical field of speed reducer, specifically relates to a cycloid speed reducer input shaft connecting structure for connecting speed reducer input shaft and motor shaft, including connecting axle no. One and connecting axle no. Two, connecting axle no. One is connected with speed reducer input shaft through connecting component no. One, and connecting axle no. Two is connected with motor shaft through connecting component no. Two, the U -shaped hole is set up on connecting axle no. One, connecting axle no. Two is U -shaped axle, and with U -shaped hole is adapted. The utility model, through the cooperation of detachable U -shaped axle and U -shaped hole, can completely replace the existing flat key connection, will not appear the phenomenon such as existing grinding key, sliding key, and also need not integral replacement motor shaft and speed reducer input shaft can adapt to different specifications of speed reducer axle, further improve the versatility, shorten the motor shaft and speed reducer input flange length simultaneously, make the cooperation of speed reducer input end and motor shaft closer to bearing, increase the stability of transmission torque.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer technology, and in particular to a connection structure for the input shaft of a cycloidal speed reducer. Background Technology

[0002] In the connection between the cycloidal pinwheel reducer and the motor, the torque is transmitted between the motor and the reducer through a flat key. In many cases, due to equipment requirements, the output end of the reducer is subjected to unstable force, often accompanied by intermittent force, frequent start-stop, frequent forward and reverse rotation, and impact. In addition, the motor shaft rotates at high speed, and relying solely on a single flat key to transmit torque can easily lead to phenomena such as key wear and key slippage.

[0003] Furthermore, at present, motors of different power can achieve reasonable torque transmission by changing the motor shaft diameter, key width, and key length; however, it is difficult to protect the keyway of the input shaft of the cycloidal pinwheel reducer from key wear, key slippage, and other phenomena under the above working conditions. In order to solve the above problems, we propose a connection structure for the input shaft of the cycloidal reducer. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a connection structure for the input shaft of a cycloidal reducer, so as to solve the problems of key wear and key slippage that easily occur when the existing motor shaft and reducer input shaft rely on a single flat key to transmit torque.

[0005] To achieve the above objectives, this utility model provides a cycloidal reducer input shaft connection structure for connecting the reducer input shaft and the motor shaft. It includes a first connecting shaft and a second connecting shaft. The first connecting shaft is connected to the reducer input shaft via a first connecting assembly, and the second connecting shaft is connected to the motor shaft via a second connecting assembly. The first connecting shaft has a U-shaped hole, and the second connecting shaft is a U-shaped shaft adapted to the U-shaped hole, so that when the motor shaft rotates, the reducer input shaft rotates under the cooperation of the U-shaped hole and the second connecting shaft.

[0006] Preferably, the connecting assembly includes a connecting block fixed to one end of the connecting shaft, and the end of the reducer input shaft is provided with a connecting groove adapted to the connecting block. The connecting shaft and the connecting block are connected to the reducer input shaft by bolts.

[0007] Preferably, the U-shaped hole has an internal threaded hole that penetrates the connecting block, and the connecting groove also has an internal threaded hole, which is compatible with the bolt.

[0008] Preferably, the second connecting component includes a second connecting block fixed to the end of the second connecting shaft, and the motor shaft has a second connecting groove adapted to the second connecting block.

[0009] Preferably, the second connecting shaft, the second connecting block, and the second connecting groove are all provided with a second internal threaded hole, and a second bolt is internally threaded into the second internal threaded hole. The second bolt is used to fix the second connecting shaft and the motor shaft.

[0010] Preferably, an arc-shaped guide surface is provided at the top corner of the U-shaped shaft, and an arc-shaped guide surface is also provided at the top of the U-shaped hole.

[0011] The beneficial effects of this utility model are as follows: The cycloidal reducer input shaft connection structure provided by this utility model is to install a connecting shaft one on the reducer input shaft so that the reducer input shaft has a U-shaped hole, and connect a connecting shaft two (U-shaped shaft) on the motor shaft so that the end of the motor shaft is a U-shaped shaft; The U-shaped hole and U-shaped shaft have a large contact area, which can completely replace the existing flat key connection and avoid the problems of key wear and slippage. Through the detachable U-shaped shaft and U-shaped hole, different specifications of reducer shafts can be adapted without replacing the entire motor shaft and reducer input shaft, further improving versatility. At the same time, the length of the motor shaft and reducer input flange is shortened, making the fit between the reducer input end and the motor shaft closer to the bearing, increasing the stability of torque transmission, and avoiding noise problems caused by excessively long motor shafts or reducer input shafts and concentricity issues. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of a prior art structure in which the motor shaft and the reducer input shaft are connected by a flat key. Figure 2 This is a schematic diagram of the structure of the present invention, showing the connection between the motor shaft and the reducer input shaft through a U-shaped hole and a U-shaped shaft; Figure 3 This is a schematic diagram of the structure of the reducer input shaft, connecting shaft one, connecting shaft two, and motor shaft of this utility model; Figure 4 This utility model Figure 3 A schematic diagram of the explosive structure; Figure 5 This is a schematic diagram of the input shaft, connecting assembly 1, and U-shaped hole of the reducer of this utility model; Figure 6 This is a schematic diagram of the structure of the motor shaft, connecting component 2, and U-shaped shaft of this utility model.

[0014] In the diagram: 1. Reducer input shaft; 2. Motor shaft; 3. Connecting shaft one; 4. Connecting shaft two; 5. U-shaped hole; 6. Connecting block one; 7. Bolt one; 8. Connecting block two; 9. Bolt two; 10. Arc-shaped guide surface. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0016] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0017] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, a cycloidal reducer input shaft connection structure is used to connect the reducer input shaft 1 and the motor shaft 2. It includes a first connecting shaft 3 and a second connecting shaft 4. The first connecting shaft 3 is connected to the reducer input shaft 1 through a first connecting component, and the second connecting shaft 4 is connected to the motor shaft 2 through a second connecting component. The first connecting shaft 3 has a U-shaped hole 5, and the second connecting shaft 4 is a U-shaped shaft that is adapted to the U-shaped hole 5, so that when the motor shaft 2 rotates, it drives the reducer input shaft 1 to rotate under the cooperation of the U-shaped hole 5 and the second connecting shaft 4.

[0018] By installing connecting shaft 3 on the input shaft 1 of the reducer, the input shaft 1 of the reducer has a U-shaped hole 5. Connecting shaft 4 (U-shaped shaft) is connected to the motor shaft 2, so that the end of the motor shaft 2 is a U-shaped shaft. The U-shaped hole 5 and the U-shaped shaft have a large contact area, which can completely replace the existing flat key connection and will not cause existing key wear, key slippage and other phenomena.

[0019] In a preferred embodiment of the present invention, the connecting component includes a connecting block 6 fixed to the end of the connecting shaft 3, and the end of the reducer input shaft 1 is provided with a connecting groove adapted to the connecting block 6. The connecting shaft 3 and the connecting block 6 are connected to the reducer input shaft 1 by bolts 7.

[0020] The U-shaped hole 5 has an internal threaded hole 1 that passes through the connecting block 1 6, and the connecting groove 1 also has an internal threaded hole 1. The internal threaded hole 1 is compatible with the bolt 1 7.

[0021] The connecting block 6 is cross-shaped. The steps for installing the connecting shaft 3 on the input shaft 1 of the reducer are as follows: first, insert the connecting block 6 into the connecting groove, and then screw the bolt 7 into the internal thread hole to fix the connecting shaft 3 and the input shaft 1 of the reducer. The bolt 7 only plays the role of axial fixation. The cross-shaped connecting block 6 mainly plays the role of transmitting torque.

[0022] In another preferred embodiment of the present invention, the connecting component two includes a connecting block two 8 fixed at the end of the connecting shaft two 4, and a connecting groove two adapted to the connecting block two 8 is provided on the motor shaft 2.

[0023] The connecting shaft 2 4, the connecting block 2 8, and the connecting groove 2 are all provided with internal threaded holes 2. Bolt 2 9 is connected to the internal thread of the internal threaded holes. Bolt 2 9 is used to fix the connecting shaft 2 4 and the motor shaft 2.

[0024] The connecting block 28 is cross-shaped. The steps for installing the connecting shaft 24 on the motor shaft 2 are as follows: first, insert the connecting block 28 into the connecting groove 2, and then screw the bolt 29 into the internal thread hole 2 to fix the connecting shaft 24 and the motor shaft 2. The bolt 29 only plays the role of axial fixation, and the cross-shaped connecting block 28 mainly plays the role of transmitting torque.

[0025] By using the detachable U-shaped shaft (connecting shaft 2 4) and U-shaped hole 5, different specifications of reducer shafts can be adapted without replacing the entire motor shaft 2 and reducer input shaft 1, further improving versatility. At the same time, shortening the length of motor shaft 2 and reducer input flange makes the fit between reducer input shaft 1 and motor shaft 2 closer to that of a bearing, increasing the stability of torque transmission and avoiding noise problems caused by excessively long motor shafts or reducer input shafts and concentricity issues.

[0026] In another preferred embodiment of this utility model, an arc-shaped guide surface 10 is provided at the top corner of the U-shaped shaft, and an arc-shaped guide surface 10 is also provided at the top of the U-shaped hole. By setting the arc-shaped guide surface 10, the problem of stress concentration can be reduced.

[0027] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0028] The embodiments of this utility model are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A cycloidal reducer input shaft connection structure for connecting the reducer input shaft (1) and the motor shaft (2), characterized in that, It includes a first connecting shaft (3) and a second connecting shaft (4). The first connecting shaft (3) is connected to the input shaft (1) of the reducer through a first connecting component, and the second connecting shaft (4) is connected to the motor shaft (2) through a second connecting component. The first connecting shaft (3) has a U-shaped hole (5), and the second connecting shaft (4) is a U-shaped shaft that is adapted to the U-shaped hole (5) so that when the motor shaft (2) rotates, it drives the input shaft (1) of the reducer to rotate under the cooperation of the U-shaped hole (5) and the second connecting shaft (4).

2. The cycloidal reducer input shaft connection structure according to claim 1, characterized in that, The connecting component includes a connecting block (6) fixed at the end of the connecting shaft (3). The end of the reducer input shaft (1) is provided with a connecting groove that is compatible with the connecting block (6). The connecting shaft (3) and the connecting block (6) are connected to the reducer input shaft (1) by bolts (7).

3. The cycloidal reducer input shaft connection structure according to claim 2, characterized in that, The U-shaped hole (5) is provided with an internal threaded hole that passes through the connecting block (6), and the connecting groove is also provided with an internal threaded hole. The internal threaded hole is compatible with the bolt (7).

4. The cycloidal reducer input shaft connection structure according to claim 1, characterized in that, The second connecting component includes a second connecting block (8) fixed at the end of the second connecting shaft (4), and the motor shaft (2) has a second connecting groove that is adapted to the second connecting block (8).

5. The cycloidal reducer input shaft connection structure according to claim 4, characterized in that, The connecting shaft 2 (4), the connecting block 2 (8) and the connecting groove 2 are all provided with internal threaded holes 2. The internal threaded holes are internally threaded with bolts 2 (9). The bolts 2 (9) are used to fix the connecting shaft 2 (4) and the motor shaft (2).

6. The cycloidal reducer input shaft connection structure according to claim 1, characterized in that, An arc-shaped guide surface (10) is provided at the top corner of the U-shaped shaft, and an arc-shaped guide surface (10) is also provided at the top of the U-shaped hole.

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