cross coupling and servo motor

Abstract

This utility model discloses a cross coupling and a servo motor, belonging to the field of automatic control technology. It includes a cross coupling axially connecting an encoder assembly and a motor shaft. The cross coupling comprises a first connecting member, a cross adapter bracket, and a second connecting member. The first connecting member is slidably connected to a first end face of the cross adapter bracket, and the second connecting member is slidably connected to a second end face of the cross adapter bracket. This utility model forms a connecting member by stacking and fixing at least one metal sheet. The multi-piece connecting member offers greater flexibility, higher dimensional control precision for each individual metal sheet, better consistency, and easier processing, resulting in a higher yield rate in actual production.

Description

Technical Field

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

[0002] A cross coupling is a connection structure mounted on a servo motor. It is used to connect two shafts with different axes or large angles between them to compensate for displacement and angular deviations between the shafts, thus achieving smooth transmission of power and torque. Using a cross coupling to connect an encoder and a servo motor can effectively buffer impacts and prevent the servo motor from transmitting force to the connected encoder during an impact, thus preventing negative impacts on the encoder's accuracy.

[0003] However, in existing technologies, the structure of cross coupling connectors suffers from poor flexibility and consistency, which further leads to difficulties in processing and low product yield in actual production. Therefore, improving the flexibility and consistency of cross coupling connectors is a problem worthy of attention for those skilled in the art. Utility Model Content

[0004] This invention aims to overcome the problems of poor structural flexibility and consistency of cross couplings in the prior art, and provides a cross coupling and a servo motor.

[0005] To achieve the above objectives, the present invention provides a cross coupling, comprising a first connector, a cross adapter bracket, and a second connector. The first connector is slidably connected to the first end face of the cross adapter bracket, and the second connector is slidably connected to the second end face of the cross adapter bracket. Both the first connector and the second connector include at least one metal piece, and any two of the metal pieces are axially fixedly connected.

[0006] In one embodiment, the first connector includes a first groove and a first through hole, with the first groove provided on both sides of the first connector and the first through hole being formed at the center of the first connector; the second connector includes a second groove and a second through hole, with the second groove provided on both sides of the second connector and the second through hole being formed at the center of the second connector.

[0007] In one embodiment, the first end of the motor shaft is installed in the first through hole, and the first end of the connecting shaft is installed in the second through hole.

[0008] In one embodiment, the cross adapter bracket includes a first mounting groove, a second mounting groove, at least one first boss and at least one second boss. The first mounting groove is formed on the end face of the cross adapter bracket near the motor shaft, and at least one first boss is provided in the first mounting groove. The second mounting groove is formed on the end face of the cross adapter bracket near the connecting shaft, and at least one second boss is provided in the second mounting groove.

[0009] In one embodiment, the first mounting groove and the second mounting groove extend in different directions.

[0010] In one embodiment, the first connector is slidably installed in the first mounting groove, and the second connector is slidably installed in the second mounting groove.

[0011] In one embodiment, a first boss is provided in the first groove, and the first boss radially limits the first connector; a second boss is provided in the second groove, and the second boss radially limits the second connector.

[0012] This utility model also provides a servo motor, including,

[0013] The cross coupling;

[0014] A motor shaft, which is coaxially mounted at the first end of the cross coupling;

[0015] An encoder assembly, which is coaxially mounted at the second end of the cross coupling;

[0016] A housing is disposed outside the cross coupling, the encoder assembly, and the motor shaft.

[0017] In one embodiment, the encoder assembly includes a connecting shaft, a bearing, a sealing ring, a bracket, and an encoder. The connecting shaft is coaxially inserted inside the bracket, the bearing is coaxially installed inside the bracket, and the bearing is coaxially fitted onto the connecting shaft. A first end of the connecting shaft is connected to the cross coupling, and a second end of the connecting shaft is connected to the encoder. The encoder is axially mounted on the bracket, and a sealing ring is provided at the bottom end of the bracket.

[0018] In summary, this utility model provides a cross coupling and a servo motor. By stacking and fixing at least one metal sheet to form a connector, the multi-piece connector offers greater flexibility. The number or shape of the stacked metal sheets can be changed according to actual needs, optimizing the connection effect or improving the applicability of the first connector. Furthermore, the dimensional control precision of a single metal sheet is higher, the consistency is better, the processing difficulty is lower, and the pass rate in actual production is also higher.

[0019] 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

[0020] Figure 1 A cross-sectional view of the servo motor provided for this utility model.

[0021] Figure 2 This is a schematic diagram of the cross coupling assembly provided by this utility model.

[0022] Figure 3 for Figure 2 Exploded view.

[0023] Figure 4 for Figure 3 Exploded view of the encoder component.

[0024] Figure 5 for Figure 2 A schematic diagram of a cross coupling.

[0025] Figure 6 for Figure 5 Exploded view of the central cross coupling.

[0026] Figure 7 for Figure 6 A first-view schematic diagram of the cross adapter bracket in the provided cross coupling.

[0027] Figure 8 for Figure 6 A second-view schematic diagram of the cross adapter bracket in the provided cross coupling. Detailed Implementation

[0028] 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.

[0029] Figure 1 This is a cross-sectional view of the servo motor in this utility model. (See attached image.) Figure 1 As shown, the servo motor includes a housing 4, in which a cross coupling 1, an encoder assembly 2, and a motor shaft 3 are coaxially mounted.

[0030] like Figure 2As shown, the cross coupling 1 axially connects the encoder assembly 2 and the motor shaft 3. The first end of the cross coupling 1 is coaxially connected to the motor shaft 3, and the second end of the cross coupling 1 is coaxially connected to the encoder assembly 2. The cross coupling 1, encoder assembly 2, and motor shaft 3 are all installed within the housing. Figure 3 It can be seen that the cross coupling 1 can compensate for the displacement and angular deviation between the connecting shaft 21 in the encoder assembly 2 and the motor shaft 3, ensuring the smooth transmission of power and torque, and avoiding the problem of reduced accuracy of the encoder due to impact and shaking of the motor during operation.

[0031] Figure 4 This is an exploded view of the encoder assembly in this utility model. Figure 4 As shown, the encoder assembly 2 includes a connecting shaft 21, a bearing 22, a sealing ring 23, a bracket 24, and an encoder 25. The connecting shaft 21 is coaxially inserted inside the bracket 24, and the bearing 22 is coaxially mounted inside the bracket 24, coaxially sleeved on the connecting shaft 21. The first end of the connecting shaft 21 is connected to the cross coupling 1, and the second end is connected to the encoder 25. The encoder 25 is axially mounted on the bracket 24, and a sealing ring 23 is provided at the bottom of the bracket 24. The encoder 25 can be either an optical encoder or a magnetic encoder. The bearing 22 can be selected as a single or double bearing depending on actual needs. The sealing ring 23 is used to prevent motor lubricating oil from contaminating the encoder 25.

[0032] like Figure 5 As shown, the cross coupling 1 includes a first connector 11, a cross adapter bracket 12, and a second connector 13. The first connector 11 is slidably connected to the first end face of the cross adapter bracket 12, and the second connector 13 is slidably connected to the second end face of the cross adapter bracket 12.

[0033] like Figure 6As shown, the first connector 11 includes at least one metal sheet 111, and any two metal sheets 111 are axially fixedly connected. Any two metal sheets 111 can be fixed by stamping and riveting, or other fixing methods can be used. The metal sheet 111 is made of stainless steel or other materials with good mechanical properties. Compared with connectors in the prior art, the multi-piece riveted first connector 11 has greater flexibility. While ensuring strength, the first connector 11 can change the stacking number or shape of the metal sheets according to actual needs, optimizing the connection effect or improving the applicability of the first connector 11. At the same time, compared with directly machining larger connectors, the dimensional control precision of a single metal sheet 111 is higher, the consistency is better, and the processing difficulty is lower; therefore, the pass rate of the metal sheet 111 in actual production is also higher.

[0034] The first connector 11 further includes a first groove 112 and a first through hole 113. The first groove 112 is provided on both sides of the first connector 11, and the first through hole 113 is located at the center of the first connector 11. The first groove 112 is used to accommodate the first boss of the cross-shaped adapter bracket 12, and the first through hole 113 can be used to install the motor shaft 3 (see...). Figure 2 The first end of ).

[0035] The second connector 13 also includes at least one metal piece 131, and any two metal pieces 131 are axially fixedly connected. The second connector 13 further includes a second groove 132 and a second through hole 133. The second groove 132 is provided on both sides of the second connector 13, and the second through hole 133 is located at the center of the second connector 13. The second groove 132 is used to accommodate the second boss of the cross-shaped adapter bracket 12, and the second through hole 133 can be used to install the first end of the connecting shaft 21.

[0036] like Figure 7 and Figure 8As shown, the cross adapter bracket 12 includes a first end face 121, a second end face 122, a first mounting groove 123, a second mounting groove 124, at least one first boss 125, at least one second boss 126, and a third through hole 127. The first end face 121 is located at the end of the cross adapter bracket 12 near the motor shaft 3, and the second end face 122 is located at the end of the cross adapter bracket 12 near the connecting shaft 21. The first mounting groove 123 is formed on the first end face 121, and at least one first boss 125 is provided in the first mounting groove 123. The second mounting groove 124 is formed on the second end face 122, and at least one second boss 126 is provided in the second mounting groove 124. The third through hole 127 is formed at the center of the cross adapter bracket 12. The first connector 11 is slidably installed in the first mounting groove 123, and the second connector 13 is slidably installed in the second mounting groove 124. The first mounting groove 123 and the second mounting groove 124 extend in different directions, so the first connector 11 and the second connector 13 move in different directions.

[0037] Combination Figures 1 to 8 It can be seen that when the cross coupling 1 connects the connecting shaft 21 and the motor shaft 3, the first end of the motor shaft 3 is fixedly installed in the first through hole 113, and the first end of the connecting shaft 21 is fixedly installed in the second through hole 133. The first connecting member 11 is slidably installed in the first mounting groove 123, and the second connecting member 13 is slidably installed in the second mounting groove 124. If the two shafts have a displacement deviation, the first connecting member 11 slides in the first mounting groove 123. When the inner wall of the first groove 112 and the outer wall of the first boss 125 are in direct contact, the first boss 125 will radially limit the first connecting member 11; the second connecting member 13 slides in the second mounting groove 124, and the second boss 126 will limit the range of motion of the second connecting member 13. The cross coupling 1 can alleviate the angular and speed errors between the connecting shaft 21 and the motor shaft 3, and improve the transmission efficiency and operational stability of the motor equipment.

[0038] In summary, this utility model provides a cross coupling and a servo motor. By stacking and fixing at least one metal sheet to form a connector, the multi-piece connector offers greater flexibility. The number or shape of the stacked metal sheets can be changed according to actual needs, optimizing the connection effect or improving the applicability of the first connector. Furthermore, the dimensional control precision of a single metal sheet is higher, the consistency is better, the processing difficulty is lower, and the pass rate in actual production is also higher.

[0039] 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, It includes a first connector, a cross-shaped adapter bracket, and a second connector. The first connector is slidably connected to a first end face of the cross-shaped adapter bracket, and the second connector is slidably connected to a second end face of the cross-shaped adapter bracket. Both the first connector and the second connector include at least one metal sheet, and any two metal sheets are axially fixedly connected. The number of stacked metal sheets can be changed to improve the applicability of the first connector and the second connector. The first connector and the second connector are riveted together.

2. The cross coupling as described in claim 1, characterized in that, The first connector includes a first groove and a first through hole, with the first groove provided on both sides of the first connector and the first through hole located at the center of the first connector; the second connector includes a second groove and a second through hole, with the second groove provided on both sides of the second connector and the second through hole located at the center of the second connector.

3. The cross coupling as described in claim 2, characterized in that, The first end of the motor shaft is installed in the first through hole, and the first end of the connecting shaft is installed in the second through hole.

4. The cross coupling as described in claim 3, characterized in that, The cross-shaped adapter bracket includes a first mounting groove, a second mounting groove, at least one first boss, and at least one second boss. The first mounting groove is formed on the end face of the cross-shaped adapter bracket near the motor shaft, and at least one first boss is provided in the first mounting groove. The second mounting groove is formed on the end face of the cross-shaped adapter bracket near the connecting shaft, and at least one second boss is provided in the second mounting groove.

5. The cross coupling as described in claim 4, characterized in that, The first mounting slot and the second mounting slot extend in different directions.

6. The cross coupling as described in claim 5, characterized in that, The first connector is slidably installed in the first mounting groove, and the second connector is slidably installed in the second mounting groove.

7. The cross coupling as described in claim 6, characterized in that, The first boss is provided in the first groove, and the first boss radially limits the first connector; the second boss is provided in the second groove, and the second boss radially limits the second connector.

8. A servo motor, characterized in that, include, The cross coupling as described in any one of claims 1-7; A motor shaft, which is coaxially mounted at the first end of the cross coupling; An encoder assembly, which is coaxially mounted at the second end of the cross coupling; A housing is disposed outside the cross coupling, the encoder assembly, and the motor shaft.

9. The servo motor as described in claim 8, characterized in that, The encoder assembly includes a connecting shaft, a bearing, a sealing ring, a bracket, and an encoder. The connecting shaft is coaxially inserted inside the bracket, and the bearing is coaxially installed inside the bracket and coaxially sleeved on the connecting shaft. The first end of the connecting shaft is connected to the cross coupling, and the second end of the connecting shaft is connected to the encoder. The encoder is axially mounted on the bracket, and a sealing ring is provided at the bottom end of the bracket.

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