Cross coupling and servo motor

Abstract

The present invention discloses a cross coupling and a servo motor, belonging to the technical field of cross couplings, and includes a switching component and a mounting frame, wherein the mounting frame is axially mounted with the switching component. The present invention fixes the mounting frame on a housing, and at least one column is arranged on the mounting frame, wherein the column is used for axially mounting an encoder, and a visual mounting space is provided on the mounting frame, which provides a simple installation method for the encoder. In addition, the mounting frame is made of metal material, which is convenient for grounding and improves assembly efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of cross couplings, and in particular to a cross coupling and a servo motor. Background Art

[0002] The cross coupling is a commonly used rotary transmission device in servo motors. It can transmit the 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] At present, closed plastic seats are often used to install cross couplings on servo motors, which has problems such as difficult alignment and poor installation accuracy. At the same time, due to the use of plastic materials, the encoder board and the servo motor housing cannot be directly connected, and additional metal sheets or connecting cables are required to connect the encoder board and the servo motor housing, thereby introducing interference signals into the servo motor and grounding them to avoid signal interference. This not only makes the assembly of the cross coupling difficult, but also increases material costs and labor costs. Summary of the invention

[0004] The invention aims to overcome the problems of troublesome assembly and poor accuracy of a cross coupling, and provides a cross coupling and a servo motor.

[0005] To achieve the above object, the technical solution of the present invention is: a cross coupling is provided, including a mounting frame, the mounting frame includes a panel, at least one column and at least one second boss, the column is arranged on the panel, and the second boss is arranged on the outer edge of the column.

[0006] In one embodiment, the mounting frame further includes a first through hole and a first boss, the center of the first boss is disposed on the panel, the center of the first through hole passes through the first boss and the panel, and the column is disposed on the 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 also includes a transition component, the mounting frame and the transition component are axially installed, the transition component includes a transition block, a first connecting member and a second connecting member, the first connecting member is axially slidably connected to the first end of the transition block, the second connecting member is axially slidably connected to the second end of the transition block, the first connecting member is connected to the connecting shaft, and the second connecting member is connected to the motor shaft.

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

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

[0011] The present invention also provides a servo motor, comprising:

[0012] Back cover;

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

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

[0015] An encoder, the encoder being axially mounted at one end of the cross coupling;

[0016] A motor shaft, the motor shaft being axially mounted on the other end of the cross coupling;

[0017] An inner component is coaxially mounted on the motor shaft.

[0018] In one embodiment, a fourth boss protrudes axially from the housing, and a mounting frame of the cross coupling is axially mounted on the fourth boss.

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

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

[0021] In summary, the present invention provides a cross coupling and a servo motor. The present invention provides a simple installation method for the encoder by fixing the mounting frame on the housing, providing at least one column on the mounting frame, and providing a visible installation space on the mounting frame. In addition, the mounting frame is made of metal material, which is convenient for grounding and improves assembly efficiency.

[0022] In order to make the above features and advantages of the invention more obvious and easy to understand, embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a cross-sectional view of the servo motor in the present invention.

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

[0025] Figure 3 It is a schematic diagram of the mounting frame in the cross coupling of the present invention. DETAILED DESCRIPTION

[0026] In order to make the purpose and technical solution of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Figure 1 Schematic diagram of the servo motor in the present invention. Figure 1 As shown, the housing 1 and the rear cover 2 are axially mounted to form a receiving space 6, and the cross coupling 3 is mounted in the receiving space 6. The motor shaft 4 is coaxially mounted in the housing 1, the encoder 5 is coaxially mounted in the rear cover 2, and the cross coupling 3 axially connects the motor shaft 4 and the connecting shaft of the encoder 5. The cross coupling 3 can transmit the motion and torque between the motor shaft 4 in the motor and the connecting shaft in the encoder 5 to correct the relative displacement of the two shafts and realize angle compensation.

[0028] Figure 2 for Figure 1 Exploded diagram, combined with Figure 1 and Figure 2 It can be seen that the housing 1 is provided with an axially protruding third boss 11 to radially limit the rear cover 2, and the outer periphery of the third boss 11 is provided with a first groove 12 to install the second sealing ring 121. At least one third threaded hole 13 is evenly provided on the outer side of the third boss 11 for installing the screws for fixing the rear cover 2. A fourth boss 14 is provided on the inner side of the third boss 11, and at least one boss 15 radially protrudes from the inner wall of the fourth boss 14, and the boss 15 axially installs the mounting frame 31 of the cross coupling 3. A fourth threaded hole 16 is provided on any of the bosses 15, and a screw for fixing the mounting frame 31 is installed in the fourth threaded hole 16. In addition, a second groove 17 is provided 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 elastic material, and the material can be selected according to the specific application scenario and requirements, such as rubber, silicone, etc. The housing 1 is provided with a fifth through hole 18 . The fifth through hole 18 is provided at the inner side of the boss 15 . The fifth through hole 18 is used for mounting the motor shaft 4 .

[0029] The housing 1 is provided with an internal component 8 and a motor shaft 4, wherein the internal component 8 is coaxially mounted on the motor shaft 4, and one end of the motor shaft 4 is mounted in the cross coupling 3. Meanwhile, the encoder 5 is mounted on the mounting bracket 31 of the cross coupling 3, and the encoder 5 is mounted on the cross coupling 3 via a connecting shaft 51, and a double bearing 52 is coaxially arranged on the connecting shaft 51, and the double bearing 52 can provide multiple balance support points, which helps the connecting shaft 51 to be more stable and reliable during operation.

[0030] The cross coupling 3 includes a conversion component 32 and a mounting frame 31. The mounting frame 31 is coaxially mounted with the conversion component 32 in the housing 1. The mounting frame 31 is mounted on the fourth boss 14 of the housing 1. The connecting shaft 51 is mounted on one end of the conversion component 32, and the motor shaft 4 is mounted on the other end of the conversion component 32. The cross coupling 3 is used to axially connect the motor shaft 4 and the connecting shaft 51 in the encoder 5. The conversion component 32 includes a conversion 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 conversion block 321, and the second connecting member 323 is axially slidably connected to the second end of the conversion block 321. The first connecting member 322 is connected to the connecting shaft 51, and the second connecting member 323 is connected 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 provided at the center of the first connector body 3221, and at least one first limiting groove 3223 is provided 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 provided at the center of the second connector body 3231, and at least one second limiting groove 3233 is provided on the second connector body 3231.

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

[0033] The shapes of the first receiving groove 3213 and the first connecting member 322, and the shapes of the second receiving groove 3214 and the second connecting member 323 are matched. The first connecting member 322 is slidably installed in the first receiving groove 3213, and the second connecting member 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 connecting member 322 and the second connecting member 323. At the same time, the number and shape of the first limiting block 3215 and the second limiting block 3216 match those 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 outside 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 connecting member 322 and the second connecting member 323 to prevent the first connecting member 322 and the second connecting member 323 from sliding off the adapter block 321. The second through hole 3222, the fourth through hole 3212 and the third through hole 3232 are coaxially installed 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 component 32 can connect the connecting shaft 51 and the motor shaft 4 and correct the relative displacement during the movement of the two axes.

[0034] like Figure 3 As shown, the mounting frame 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 arranged at the center of the panel 311, the center of the first through hole 312 passes through the first boss 313 and the panel 311, at least one column 314 is arranged at the periphery of the first boss 313, and the second boss 315 is arranged at the outer edge of any column 314. The mounting frame 31 is made of metal material, which has better shock resistance and processing accuracy than the mounting frame made of plastic, ensuring the encoder 5 (see Figure 2 ) for stable installation. Combined with Figures 1 to 3It can be 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 hole 316 match the fourth threaded hole 16. After the two are aligned, screws can be installed to achieve fixed connection between the mounting bracket 31 and the housing 1. In addition to screw fixation, 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 any one of the columns 314 for fixedly installing 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 , at least one third limiting groove 53 is provided on the encoder 5, and the third limiting groove 53 matches the number and size of the column 314 and the second boss 315. When the encoder 5 is installed on the housing 1 through 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 the installation can be completed after tightening the screws. This installation process has higher accuracy, and a gap is left between the column 314 and the first boss 315, which can provide a visual space 317 for the installation of the encoder 5, and the alignment and calibration operations during the installation process are easier, faster and more reliable. At the same time, the mounting bracket 31 avoids a closed design, and can also reduce the volume, thereby reducing the size of the motor, which can not only save production costs, but also provide more possibilities for the use scenarios of the motor.

[0036] Since the mounting bracket 31 is made of metal, an O-type terminal (not shown in the figure) can be set on the screw passing through the first threaded hole 316 and fixed in the fourth threaded hole 16, and the O-type terminal and the connector (not shown in the figure) on the housing 1 are conductively connected by a cable (not shown in the figure). After tightening the screw, the encoder 5 can be grounded, which helps to improve the anti-interference performance of the circuit board 54. Compared with the closed plastic seat in the prior art, the mounting bracket 31 provides a simpler operation method for grounding the circuit board 54, without the need for additional metal sheets or metal housings, thereby improving assembly efficiency.

[0037] In summary, the present invention provides a cross coupling and a servo motor. The present invention fixes the mounting frame 31 on the housing 1, and at least one column 314 is provided on the mounting frame 31. The column 314 is used to axially mount the encoder 5, and there is a visible mounting space on the mounting frame 31, which provides a simple installation method for the encoder 5. In addition, the mounting frame 31 is made of metal material, which is convenient for grounding and improves assembly efficiency.

[0038] Although the present invention has been disclosed as above by way of embodiments, it is not intended to limit the present invention. Any person having ordinary knowledge in the technical field may make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the scope of the attached patent application.

Claims

1. A cross coupling, characterized in that: The mounting frame comprises a panel, at least one column and at least one second boss, wherein the column is arranged on the panel and the second boss is arranged on the outer edge of the column.

2. The cross coupling according to claim 1, characterized in that: The mounting frame further includes a first through hole and a first boss. The center of the first boss is arranged on the panel. The center of the first through hole passes through the first boss and the panel. The column is arranged on the periphery of the first boss.

3. The cross coupling according to claim 2, characterized in that: A gap is left between the column and the first boss for visually installing the encoder.

4. The cross coupling according to claim 1, characterized in that: The cross coupling also includes a transition component, the mounting frame and the transition component are axially installed, the transition component includes a transition block, a first connecting member and a second connecting member, the first connecting member is axially slidably connected to the first end of the transition block, the second connecting member is axially slidably connected to the second end of the transition block, the first connecting member is connected to the connecting shaft, and the second connecting member is connected to the motor shaft.

5. The cross coupling according to claim 4, characterized in that: The first connecting member includes a first connecting member body, a second through hole and at least one first limiting groove. The second through hole is provided at the center of the first connecting member body, and the first connecting member body is provided with at least one first limiting groove.

6. The cross coupling according to claim 5, characterized in that: The second connecting member includes a second connecting member body, a third through hole and at least one second limiting groove. The third through hole is provided at the center of the second connecting member body, and the second connecting member body is provided with at least one second limiting groove.

7. A servo motor, characterized in that: include, Back cover; A housing, wherein the housing and the rear cover are axially mounted to form a receiving space; The cross coupling according to any one of claims 1 to 6, wherein the cross coupling is mounted on the housing and in the accommodating space; An encoder, the encoder being axially mounted at one end of the cross coupling; A motor shaft, the motor shaft being axially mounted on the other end of the cross coupling; An inner component is coaxially mounted on the motor shaft.

8. The servo motor according to claim 7, characterized in that: A fourth boss is axially protruded from the housing, and a mounting frame for the cross coupling is axially mounted on the fourth boss.

9. The servo motor according to claim 8, characterized in that: The fourth boss is provided with a second groove, and a first sealing ring is installed in the second groove.

10. The servo motor according to claim 7, characterized in that: The encoder is axially mounted on a column of the mounting frame.

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