Cross coupling and servo motor

Abstract

The utility model discloses a cross coupling and a servo motor, and belongs to the technical field of cross couplings, the cross coupling comprises an adapter component and a mounting rack, and the mounting rack and the adapter component are axially mounted. According to the utility model, the mounting rack is fixedly mounted on the casing, the mounting rack is provided with at least one upright post, the upright post is used for axially mounting the encoder, and the mounting rack is provided with a visual mounting space, so that a simple mounting mode is provided for the encoder. In addition, the mounting rack is made of a metal material, so that grounding is facilitated, and the assembly efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of cross coupling technology, and in particular to cross couplings and servo motors. Background Technology

[0002] A cross coupling is a commonly used rotary transmission device in servo motors. It can transmit motion and torque between the motor shaft in the servo motor and the connecting shaft in the encoder to correct the relative displacement of the two shafts and achieve angle compensation.

[0003] Currently, enclosed plastic mounts are commonly used to install cross couplings onto servo motors, which presents problems such as alignment difficulties and poor installation accuracy. Furthermore, due to the use of plastic materials, the encoder board and the servo motor housing cannot be directly electrically connected. An additional metal plate or connecting cable is required to connect the encoder board and the servo motor housing, thereby diverting interference signals to the servo motor and grounding it to prevent signal interference. This not only makes the assembly of the cross coupling difficult but also increases material and labor costs. Utility Model Content

[0004] This utility model aims to overcome the problems of complicated assembly and poor accuracy of cross couplings, and provides a cross coupling and servo motor.

[0005] To achieve the above objectives, the present invention provides a cross coupling, including a mounting frame. The mounting frame includes a panel, at least one column, and at least one second boss. The column is disposed on the panel, and the second boss is disposed on the outer edge of the column.

[0006] In one embodiment, the mounting bracket further includes a first through hole and a first boss, the first boss being centrally located on the panel, the first through hole penetrating the first boss and the panel, and the column being disposed around the outer periphery of the first boss.

[0007] In one embodiment, a gap is left between the column and the first boss for visual installation of the encoder.

[0008] In one embodiment, the cross coupling further includes an adapter component. The mounting bracket and the adapter component are axially mounted. The adapter component includes an adapter block, a first connector, and a second connector. The first connector is axially slidably connected to a first end of the adapter block, and the second connector is axially slidably connected to a second end of the adapter block. The first connector is connected to a connecting shaft, and the second connector is connected to a motor shaft.

[0009] In one embodiment, the first connector includes a first connector body, a second through hole, and at least one first limiting groove. The second through hole is formed at the center of the first connector body, and at least one first limiting groove is formed on the first connector body.

[0010] In one embodiment, the second connector includes a second connector body, a third through hole, and at least one second limiting groove. The third through hole is formed at the center of the second connector body, and at least one second limiting groove is formed on the second connector body.

[0011] This utility model also provides a servo motor, including,

[0012] Back cover;

[0013] A housing, wherein the housing and the rear cover are axially mounted and form a receiving space;

[0014] The cross coupling as described above is mounted on the housing and installed in the receiving space;

[0015] The encoder is axially mounted at one end of the cross coupling;

[0016] A motor shaft, which is axially mounted at the other end of the cross coupling;

[0017] An internal component, which is coaxially mounted on the motor shaft.

[0018] In one embodiment, the housing has a fourth boss protruding axially, and the mounting bracket of the cross coupling is axially mounted on the fourth boss.

[0019] In one embodiment, a second groove is formed on the fourth protrusion, and a first sealing ring is installed in the second groove.

[0020] In one embodiment, the encoder is axially mounted on the column of the mounting bracket.

[0021] In summary, this utility model provides a cross coupling and a servo motor. By fixing the mounting bracket to the housing, and providing at least one column for axially mounting the encoder, the utility model offers a simplified mounting method for the encoder, and the mounting bracket provides visible mounting space. Furthermore, the mounting bracket is made of metal, facilitating grounding and improving assembly efficiency.

[0022] To make the above-mentioned features and advantages of the utility model more apparent and understandable, specific embodiments are described below, and detailed descriptions are provided in conjunction with the accompanying drawings. Attached Figure Description

[0023] Figure 1This is a cross-sectional view of the servo motor in this utility model.

[0024] Figure 2 for Figure 1 Exploded view of the servo motor.

[0025] Figure 3 This is a schematic diagram of the mounting bracket in the cross coupling of this utility model. Detailed Implementation

[0026] To make the objectives and technical solutions of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0027] Figure 1 This is a schematic diagram of the servo motor in this utility model. Figure 1 As shown, the housing 1 and the rear cover 2 are axially mounted to form a receiving space 6, and a cross coupling 3 is installed in the receiving space 6. The motor shaft 4 is coaxially mounted inside the housing 1, and the encoder 5 is coaxially mounted inside the rear cover 2. The cross coupling 3 axially connects the connecting shaft of the motor shaft 4 and the encoder 5. The cross coupling 3 can transmit the movement and torque between the motor shaft 4 inside the motor and the connecting shaft inside the encoder 5 to correct the relative displacement of the two shafts and achieve angle compensation.

[0028] Figure 2 for Figure 1 The exploded view, combined with Figure 1 and Figure 2It is known that the housing 1 has an axially protruding third boss 11 to radially limit the rear cover 2, and a first groove 12 is formed on the outer periphery of the third boss 11 to install the second sealing ring 121. At least one third threaded hole 13 is uniformly formed on the outer side of the third boss 11 for installing screws to fix the rear cover 2. A fourth boss 14 is provided on the inner side of the third boss 11, and at least one protruding post 15 is radially protruding from the inner wall of the fourth boss 14. The mounting bracket 31 of the cross coupling 3 is axially installed on the protruding post 15. A fourth threaded hole 16 is formed on any one of the protruding posts 15, and a screw for fixing the mounting bracket 31 is installed in the fourth threaded hole 16. In addition, a second groove 17 is formed on the fourth boss 14, and a first sealing ring 7 is also installed in the second groove 17 to ensure the sealing of the servo motor. The first sealing ring 7 is made of an elastic material, and the material can be selected according to the specific application scenario and requirements, such as rubber, silicone, etc. A fifth through hole 18 is provided on the housing 1. The fifth through hole 18 is provided inside the protrusion 15 and is used to install the motor shaft 4.

[0029] The housing 1 houses an internal component 8 and a motor shaft 4. The internal component 8 is coaxially mounted on the motor shaft 4, and one end of the motor shaft 4 is mounted inside the cross coupling 3. Meanwhile, the encoder 5 is mounted on the mounting bracket 31 of the cross coupling 3. The encoder 5 is mounted on the cross coupling 3 via a connecting shaft 51. The connecting shaft 51 has two coaxially arranged bearings 52, which provide multiple balance support points, contributing to a smoother and more reliable operation of the connecting shaft 51.

[0030] The cross coupling 3 includes an adapter component 32 and a mounting bracket 31. The mounting bracket 31 is coaxially mounted with the adapter component 32 inside the housing 1. The mounting bracket 31 is mounted on the fourth boss 14 of the housing 1. One end of the adapter component 32 is fitted with the connecting shaft 51, and the other end is fitted with the motor shaft 4. The cross coupling 3 is used to axially connect the motor shaft 4 and the connecting shaft 51 in the encoder 5. The adapter component 32 includes an adapter block 321, a first connecting member 322, and a second connecting member 323. The first connecting member 322 is axially slidably connected to the first end of the adapter block 321, and the second connecting member 323 is axially slidably connected to the second end of the adapter block 321. The first connecting member 322 connects to the connecting shaft 51, and the second connecting member 323 connects to the motor shaft 4.

[0031] The first connector 322 includes a first connector body 3221, a second through hole 3222, and at least one first limiting groove 3223. The second through hole 3222 is formed at the center of the first connector body 3221, and at least one first limiting groove 3223 is formed on the first connector body 3221. The second connector 323 includes a second connector body 3231, a third through hole 3232, and at least one second limiting groove 3233. The third through hole 3232 is formed at the center of the second connector body 3231, and at least one second limiting groove 3233 is formed on the second connector body 3231.

[0032] The adapter block 321 includes an adapter block body 3211, a fourth through hole 3212, a first receiving groove 3213, a second receiving groove 3214, at least one first limiting block 3215, and at least one second limiting block 3216. The fourth through hole 3212 is opened at the center of the adapter block body 3211. The first receiving groove 3213 is disposed at the first end of the adapter block body 3211, and the second receiving groove 3214 is disposed at the second end of the adapter block body 3211. At least one first limiting block 3215 is disposed in the first receiving groove 3213, and at least one second limiting block 3215 is disposed in the second receiving groove 3214.

[0033] The first receiving groove 3213 matches the shape of the first connector 322, and the second receiving groove 3214 matches the shape of the second connector 323. The first connector 322 is slidably installed in the first receiving groove 3213, and the second connector 323 is slidably installed in the second receiving groove 3214. The first receiving groove 3213 and the second receiving groove 3214 can provide sliding space for the first connector 322 and the second connector 323. At the same time, the first limiting block 3215 and the second limiting block 3216 match the number and shape of the first limiting groove 3223 and the second limiting groove 3233. The first limiting groove 3223 and the second limiting groove 3233 are sleeved on the outside of the first limiting block 3215 and the second limiting block 3216. The first limiting block 3215 and the second limiting block 3216 are used to radially limit the first connector 322 and the second connector 323, preventing the first connector 322 and the second connector 323 from slipping off the adapter block 321. The second through hole 3222, the fourth through hole 3212 and the third through hole 3232 are installed coaxially in sequence. One end of the connecting shaft 51 is installed in the second through hole 3222 and one end of the motor shaft 4 is installed in the third through hole 3232, so that the adapter 32 connects the connecting shaft 51 and the motor shaft 4 and corrects the relative displacement during the movement of the two shafts.

[0034] like Figure 3 As shown, the mounting bracket 31 includes a panel 311, a first through hole 312, a first boss 313, at least one column 314, and at least one second boss 315. The first boss 313 is located at the center of the panel 311, and the first through hole 312 passes through the first boss 313 and the panel 311. At least one column 314 is located on the outer periphery of the first boss 313, and a second boss 315 is located on the outer edge of any one of the columns 314. The mounting bracket 31 is made of metal, which has better shock resistance and processing precision than a plastic mounting bracket, ensuring the encoder 5 (see...) Figure 2 Stable installation. Combined with Figures 1 to 3 It is known that the connecting shaft 51 of the double bearing 52 is coaxially mounted in the first through hole 312. At least one first threaded through hole 316 is also provided on the panel 311. The number and size of the first threaded through holes 316 match those of the fourth threaded holes 16. After alignment, screws can be installed to achieve a fixed connection between the mounting bracket 31 and the housing 1. Besides screw fixing, other methods can be used to fix the encoder 5 and the housing 1 according to actual conditions. A second threaded hole 317 is provided on each of the columns 314 for fixing the encoder 5. At the same time, a gap is left between the column 314 and the first boss 313, and the column 314 is higher than the first boss 313.

[0035] Combination Figures 1 to 3 The encoder 5 is provided with at least one third limiting groove 53, the number and size of which match the number and size of the column 314 and the second boss 315. When the encoder 5 is installed on the housing 1 via the mounting bracket 31, it is only necessary to axially contact the third limiting groove 53 and the column 314 to ensure that the second boss 315 radially limits the encoder 5, and then tighten the screws to complete the installation. This installation process is more accurate, and the gap between the column 314 and the first boss 315 provides a visual space 317 for the installation of the encoder 5, making alignment and calibration operations during installation easier, faster, and more reliable. At the same time, the mounting bracket 31 avoids a closed design, which can reduce the volume and thus the size of the motor. This not only saves production costs but also provides more possibilities for the application scenarios of the motor.

[0036] Since the mounting bracket 31 is made of metal, the encoder 5 can be grounded by fitting an O-type terminal (not shown) onto a screw that passes through the first threaded hole 316 and is fixed in the fourth threaded hole 16, and then electrically connecting the O-type terminal and the connector (not shown) on the housing 1 with a cable (not shown). Tightening the screw helps improve the anti-interference performance of the circuit board 54. Compared to the enclosed plastic base in the prior art, the mounting bracket 31 provides a simpler method for grounding the circuit board 54, eliminating the need for additional metal plates or a metal housing, thus improving assembly efficiency.

[0037] In summary, this utility model provides a cross coupling and a servo motor. By fixing the mounting bracket 31 onto the housing 1, and providing at least one column 314 on the mounting bracket 31 for axial mounting of the encoder 5, and by providing visible mounting space on the mounting bracket 31, this utility model offers a simple installation method for the encoder 5. Furthermore, the mounting bracket 31 is made of metal, facilitating grounding and improving assembly efficiency.

[0038] Although the present invention has been disclosed above by way of embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A cross coupling, characterized in that, The mounting bracket includes a panel, at least one upright, and at least one second protrusion. The upright is disposed on the panel, and the second protrusion is disposed on the outer edge of the upright. The mounting bracket also includes a first through hole and a first protrusion. The center of the first protrusion is disposed on the panel, and the center of the first through hole penetrates the first protrusion and the panel. The upright is disposed on the outer periphery of the first protrusion. The mounting bracket is made of metal.

2. The cross coupling as described in claim 1, characterized in that, A gap is left between the column and the first boss for visual installation of the encoder.

3. The cross coupling as described in claim 1, characterized in that, The cross coupling also includes an adapter component. The mounting bracket and the adapter component are axially mounted. The adapter component includes an adapter block, a first connector, and a second connector. The first connector is axially slidably connected to a first end of the adapter block, and the second connector is axially slidably connected to a second end of the adapter block. The first connector is connected to a connecting shaft, and the second connector is connected to a motor shaft.

4. The cross coupling as described in claim 3, characterized in that, The first connector includes a first connector body, a second through hole, and at least one first limiting groove. The second through hole is formed at the center of the first connector body, and at least one first limiting groove is formed on the first connector body.

5. The cross coupling as described in claim 4, characterized in that, The second connector includes a second connector body, a third through hole, and at least one second limiting groove. The third through hole is formed at the center of the second connector body, and at least one second limiting groove is formed on the second connector body.

6. A servo motor, characterized in that, include, Back cover; A housing, wherein the housing and the rear cover are axially mounted and form a receiving space; The cross coupling as described in any one of claims 1-5 is mounted on the housing and in the receiving space; The encoder is axially mounted at one end of the cross coupling; A motor shaft, which is axially mounted at the other end of the cross coupling; An internal component, which is coaxially mounted on the motor shaft.

7. The servo motor as described in claim 6, characterized in that, The housing has a fourth protrusion extending axially, and the mounting bracket for the cross coupling is axially mounted on the fourth protrusion.

8. The servo motor as described in claim 7, characterized in that, A second groove is formed on the fourth protrusion, and a first sealing ring is installed in the second groove.

9. The servo motor as described in claim 6, characterized in that, The encoder is axially mounted on the column of the mounting bracket.

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