A servo motor

Abstract

The application relates to a servo motor which comprises a shell, a stator, a rotating shaft, an end cover and a swing clamp seat, the swing clamp seat is installed in a shell cavity of the shell and is provided with two groups of swing clamping jaws, the rotating shaft is located between the two groups of swing clamping jaws and a rotating shaft peripheral wall is in rotating abutment with the swing clamping jaws, damping springs are connected between the swing clamping jaws and the shell, an air vent is formed in the shell and an explosion-proof cover is arranged at the air vent, the explosion-proof cover and the extension piece are provided with detachable parts for making the extension piece separate from the shell, and the swing clamp seat is provided with clamping parts for making the two groups of swing clamping jaws clamp the rotating shaft. When the servo motor explodes, the explosion-proof cover is combined at the air vent, the extension piece separates from the shell, the clamping parts drive the swing clamping jaws to clamp the rotating shaft until the rotating shaft is clamped to stop, so that the shaking amplitude of the rotating shaft during explosion is reduced, the damage probability of external equipment is reduced, and the damage degree of the servo motor explosion is further reduced.

Description

Technical Field

[0001] This application relates to the field of motor manufacturing technology, and in particular to a servo motor. Background Technology

[0002] A servo motor is an engine that controls the operation of mechanical components in a servo system; it is a type of auxiliary motor with indirect speed change. Used as an actuator in automatic control systems, it features a small electromechanical time constant and high linearity, converting received electrical signals into angular displacement or angular velocity output on the motor shaft. A servo motor mainly consists of a housing, stator, rotor, shaft, end cover, and encoder. The stator and rotor are housed within the housing cavity. The end cover is locked and fixed to the front and rear ends of the motor housing. The stator includes a stator core and stator windings mounted on the stator core. The rotor includes a rotor core and permanent magnets mounted on the rotor core. The rotor core is fixed to the front end of the shaft and connected to the end cover. The encoder is mounted at the rear end of the shaft.

[0003] Servo motors are prone to generating electric sparks or arcs during high-speed operation, causing the air inside the motor to expand instantly due to heat. Outside air and other explosive substances can enter the servo motor through its airflow ports and react with the electric sparks or arcs, causing internal combustion. The ignition source can then cause an explosion within the confined space inside the servo motor, resulting in a safety accident.

[0004] During a servo motor explosion, the servo motor itself vibrates significantly, and the shaft connecting the servo motor to the external device also vibrates. When the shaft vibrates, the connection point with the external device may detach or even break, thus increasing the damage to the external device and further exacerbating the destructive impact of the servo motor explosion. Summary of the Invention

[0005] In order to reduce the vibration amplitude of the shaft during an explosion and reduce the probability of damage to external devices, thereby further reducing the destructive extent of the servo motor explosion, this application provides a servo motor.

[0006] The servo motor provided in this application adopts the following technical solution: A servo motor includes a housing, a stator, a rotor, a shaft, and an end cover. The front end of the shaft passes through the end cover at the front end of the housing. The motor also includes a swing clamp, which is installed inside the housing cavity and has two sets of swing jaws. The shaft is located between the two sets of swing jaws, and its peripheral wall rotates and abuts against the swing jaws. A shock-absorbing spring connects the swing jaws to the housing, and a telescopic member is provided for adjusting the distance between the two sets of swing jaws. The housing has a vent, and an explosion-proof cover is provided at the vent. A detachable component is provided at the explosion-proof cover and the telescopic component for disengaging the telescopic component from the housing. The swing clamp is provided with a clamping component for clamping the shaft between the two sets of swing jaws.

[0007] By adopting the above technical solution, when an explosion occurs inside the servo motor, the airflow generated by the explosion inside the housing will push the explosion-proof cover to close at the vent, reducing the inflow of outside air into the housing and thus reducing the impact of the servo motor explosion on the external environment. Simultaneously, the impact on the shaft during the explosion will cause it to vibrate rapidly and significantly. At this time, the telescopic component disengages from the housing, and the clamping component drives the swinging jaws to clamp the shaft until it stops. Because the clamping component clamps the shaft, it reduces the amplitude and duration of the shaft's vibration, lowering the probability of the shaft breaking due to rapid vibration. This helps protect external devices connected to the servo motor, further reducing the damage caused by the servo motor explosion.

[0008] Furthermore, when the servo motor is working normally, the swing gripper rotates and abuts against the shaft, which can reduce the vibration amplitude of the shaft during operation and limit the position of the shaft, thereby reducing the risk of the shaft deforming due to uneven force and extending the service life and stability of the servo motor.

[0009] Preferably, the swing gripper has an arc-shaped groove on the side wall facing the rotating shaft for holding the rotating shaft, and an abutment ball is rolled on the groove wall of the arc-shaped groove, and the abutment ball rotates and abuts against the peripheral wall of the rotating shaft.

[0010] By adopting the above technical solution, when the rotating shaft is working normally, the balls on the swing gripper roll on the swing gripper as the rotating shaft rotates, which limits the position of the rotating shaft while reducing friction with the rotating shaft and reducing the wear of the rotating shaft.

[0011] Preferably, at least two sets of telescopic components are connected to the side of the swing gripper away from the rotating shaft, and the two sets of telescopic components connected to the same set of swing grippers are arranged vertically opposite each other at intervals.

[0012] By adopting the above technical solution, the horizontal position of the swing gripper is limited by two sets of telescopic components, which can enhance the limiting strength and accuracy of the swing gripper.

[0013] Preferably, the telescopic component includes a telescopic rod and an adjusting screw. One end of the telescopic rod is hinged to the swing clamp, and the other end of the telescopic rod is inclined in a direction away from another set of telescopic rods and coaxially threaded onto the adjusting screw. The other end of the adjusting screw is hinged to the housing.

[0014] By adopting the above technical solution, the length of the entire telescopic component can be adjusted by adjusting the screw, so as to adjust the position of the swing gripper. Since the other end of the telescopic component is inclined in the direction away from the other set of telescopic rods, the entire telescopic component is inclined. When the shaft vibrates, the telescopic component can dampen the shaft from different directions, thereby enhancing the damping effect of the shaft and limiting the shaft from multiple directions, reducing the probability of shaft deformation.

[0015] Preferably, the telescopic rod includes a connecting rod section and an adjusting rod section. The connecting rod section is connected to the adjusting screw, and the adjusting rod section is hinged to the swing clamp and slidably sleeved on the connecting rod section. The shock-absorbing spring is coaxially sleeved on the connecting rod section and its two ends abut against the adjusting screw and the adjusting rod section, respectively.

[0016] By adopting the above technical solution, when the shaft vibrates, the swing gripper vibrates accordingly, and the adjusting rod slides on the connecting rod. The vibration energy of the shaft is absorbed by the extension and retraction of the damping spring, thereby achieving vibration reduction of the shaft.

[0017] Preferably, the explosion-proof cover is located between the swing clamp and the stator and rotates vertically to cover the vent. The explosion-proof cover is hinged to the housing on the side facing the stator. A guide post is provided on the side of the explosion-proof cover away from the stator. A guide hole for inserting the guide post is provided on the inner wall of the housing near the vent.

[0018] By adopting the above technical solution, when the servo motor is working normally, the explosion-proof cover is in the open state to facilitate the flow of heat and gas. When the servo motor explodes, the airflow generated by the explosion can push the explosion-proof cover to rotate and close at the vent. The guide post is inserted into the guide hole, thereby limiting the position of the explosion-proof cover at the vent, so as to reduce the horizontal vibration amplitude of the explosion-proof cover and improve the sealing effect of the explosion-proof cover.

[0019] Preferably, the detachable component includes a detachable main rod, a limiting baffle, a hinged connecting rod, a hinged rotating ring, and a reset component; The detachable main rod is horizontally slidably connected to the inner wall of the housing and is located on the side of the explosion-proof cover near the swing gripper. The limiting baffle is located on the side of the detachable main rod away from the explosion-proof cover. The hinged connecting rod is horizontally installed on the detachable main rod and one end slides through the limiting baffle. The hinged rotating ring is located on the side of the limiting baffle away from the detachable main rod and is coaxially rotatably sleeved on the hinged connecting rod. The hinged rotating ring is connected to the telescopic component. The reset component is used to drive the detachable main rod to slide horizontally in the direction close to the explosion-proof cover.

[0020] By adopting the above technical solution, when the servo motor explodes, the reset component can drive the detachable main rod to slide in the direction close to the explosion-proof cover. The hinge link slides together with the detachable main rod. Due to the limiting baffle restricting the position of the hinge ring, the hinge ring cannot move with the hinge link until the hinge ring disengages from the hinge link. The entire telescopic component disengages from the housing so that the subsequent clamping component can drive the swing gripper to clamp the stop shaft.

[0021] Preferably, the reset component includes a reset spring and a reset slider. The reset spring is arranged along the sliding direction of the detachable main rod, and its two ends are respectively connected to the detachable main rod and the housing. The reset slider is slidably installed in the guide hole in the vertical direction. The end of the reset slider away from the explosion-proof cover is vertically slidably abutted against the detachable main rod. The guide post inserted into the guide hole can push the reset slider to slide vertically upward until the reset slider rises away from the detachable main rod.

[0022] By adopting the above technical solution, when the servo motor explodes, during the process of the guide post inserting into the guide hole, the guide post contacts the reset slider and pushes the reset slider to move vertically upward until the reset slider rises away from the detachable main rod. The reset spring is in the extended state when the servo motor is working normally. When the reset slider slides away from the detachable main rod, the reset spring can retract and drive the detachable main rod to slide along the direction close to the explosion-proof cover.

[0023] Preferably, the clamping element includes a clamping plate, an elastic clamping bar, and a clamping spring; The two sets of swing grippers have horizontally arranged clamping grooves on their sidewalls facing the rotating shaft. The clamping plate is located in the clamping groove and is slidably connected to the swing grippers in the direction close to or away from the rotating shaft. The side of the clamping plate away from the rotating shaft is connected to the telescopic component. The elastic clamping strip is installed on the side of the clamping plate facing the rotating shaft and is used to clamp the rotating shaft. The clamping spring is arranged horizontally in the direction perpendicular to the axis of the rotating shaft and its two ends are respectively connected to the clamping plates in the two sets of swing grippers. The clamping spring is used to drive the clamping plate to clamp the rotating shaft in the direction close to the rotating shaft.

[0024] By adopting the above technical solution, the clamping spring is in an extended state when the servo motor is working normally. When the telescopic component is separated from the housing, the clamping spring retracts and drives the clamping plate to slide along the direction close to the rotating shaft until the elastic clamping strip clamps the rotating shaft. The friction of the elastic clamping strip reduces the vibration amplitude of the rotating shaft.

[0025] Preferably, the circumferential wall of the rotating shaft is provided with a plurality of circumferentially spaced clamping protrusions, and the elastic clamping strip is provided with clamping grooves that engage with the clamping protrusions.

[0026] By adopting the above technical solution, when the elastic clamping strip clamps the rotating shaft, the clamping protrusion can increase the friction area and friction direction with the elastic clamping strip, so that the clamping protrusion can engage with the clamping groove, thereby shortening the vibration time of the rotating shaft and realizing the rapid clamping of the rotating shaft.

[0027] In summary, this application includes at least one of the following beneficial technical effects: 1. The airflow generated by the explosion inside the casing will push the explosion-proof cover to close at the vent, thereby reducing the impact of the servo motor explosion on the external environment. At the same time, the telescopic component detaches from the casing, and the clamping component drives the swinging jaws to clamp the shaft until it stops, thereby reducing the amplitude and duration of shaft vibration. This helps protect external devices connected to the servo motor and further minimizes the damage caused by the servo motor explosion. 2. When the shaft is working normally, the balls on the swing gripper roll on the swing gripper as the shaft rotates, which limits the position of the shaft and reduces friction with the shaft, thus reducing the wear of the shaft; 3. When the shaft vibrates, the swing gripper vibrates accordingly, and the adjusting rod slides on the connecting rod. The vibration energy of the shaft is absorbed by the extension and retraction of the damping spring, thereby achieving vibration reduction of the shaft. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the external structure of an embodiment of this application.

[0029] Figure 2 This is a schematic diagram of the internal structure of an embodiment of this application.

[0030] Figure 3 This is a schematic diagram showing the connection between the swing gripper and the detachable component in an embodiment of this application.

[0031] Figure 4 This is a schematic diagram showing the connection between the telescopic component and the shock-absorbing spring in an embodiment of this application.

[0032] Figure 5 This is a schematic diagram of the connection between the clamping member and the telescopic member in the embodiments of this application.

[0033] In the diagram: 1. Housing; 11. Vent; 12. Guide hole; 13. Detachable slide; 2. Rotary shaft; 3. Swinging clamp; 4. Swinging gripper; 41. Arc-shaped clamping groove; 42. Clamping groove; 43. Connecting groove; 5. Shock-absorbing spring; 6. Telescopic component; 61. Telescopic rod; 611. Connecting rod section; 612. Adjusting rod section; 62. Adjusting screw; 7. Explosion-proof cover; 8. Detachable component; 81. Detachable main rod; 82. 83. Limiting baffle; 84. Hinge connecting rod; 85. Hinge rotating ring; 86. Reset component; 87. Reset spring; 88. Reset slider; 89. Push bar; 90. Clamping component; 91. Clamping plate; 92. Elastic clamping bar; 93. Clamping groove; 94. Clamping protrusion; 10. Abutting ball; 101. Guide post; 102. Stator; 103. Rotor; 104. End cover. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0035] This application discloses a servo motor. (Refer to...) Figure 1 and Figure 2 The servo motor includes a housing 1, a stator 102, a rotor 103, a shaft 2, an end cover 104, and an encoder. The stator 102 and the rotor 103 are disposed inside the housing cavity of the housing 1. The end cover 104 is locked and fixed to the front and rear ends of the housing 1. The front end of the shaft 2 is fitted with the core of the fixed rotor 103 and passes through the end cover 104 at the front end of the housing 1. The encoder is installed at the rear end of the shaft 2.

[0036] Among them, such as Figure 2 and Figure 3 As shown, a swing clamp 3 is also provided inside the housing 1. The swing clamp 3 is located between the end cover 104 and the stator 102 at the front end of the housing 1. Two sets of swing jaws 4 are slidably arranged on the swing clamp 3. The rotating shaft 2 is located between the two sets of swing jaws 4, and the peripheral wall of the rotating shaft 2 rotates and abuts against the swing jaws 4, thereby limiting the radial position of the rotating shaft 2. When the rotating shaft 2 is connected to external equipment, due to uneven force, the rotating shaft 2 may undergo radial deformation during the process of rotating and radially shaking. By limiting the radial position of the rotating shaft 2 by the swing jaws 4, the shaking amplitude of the rotating shaft 2 is reduced and the rotating shaft 2 is radially supported, thereby reducing the risk of deformation of the rotating shaft 2. A vent 11 is provided between the swing clamp 3 and the stator 102 in the housing 1. The vent 11 connects the outside to the inside of the housing 1 to facilitate airflow and heat dissipation between the inside and outside of the housing 1. An explosion-proof cover 7 is provided on the inner wall of the housing 1. The explosion-proof cover 7 is hinged to the inside of the housing 1 on the side near the stator 102. A guide post 101 is provided on the side of the explosion-proof cover 7 away from the stator 102. A guide hole 12 is provided on the inner wall of the housing 1 near the vent 11 for the guide post 101 to be inserted. This allows the guide post 101 to be inserted into the guide hole 12 when the explosion-proof cover 7 is rotated vertically to cover the vent 11, thereby reducing the probability of the explosion-proof cover 7 tilting or even shaking. The explosion-proof cover 7 is in the open state when the servo motor is working normally. When the servo motor explodes inside, the impact force generated by the explosion will push the explosion-proof cover 7 to close at the vent 11, so as to reduce the entry of external gas into the housing 1, weaken the explosion intensity of the servo motor, and reduce the number of explosion fragments that fly to the outside of the housing 1, so as to initially reduce the damage caused by the explosion of the servo motor.

[0037] In addition, when the servo motor explodes inside, the shaft 2 will vibrate rapidly and significantly, which may cause the connection between the shaft 2 and the external device to detach or even break, and the external device may also be damaged. Therefore, a damping spring 5 is connected between the swing gripper 4 and the housing 1. When the rotating shaft 2 vibrates, it can drive the swing gripper 4 to vibrate together. The extension and retraction of the damping spring 5 absorbs part of the vibration energy of the rotating shaft 2, thereby reducing the vibration amplitude of the rotating shaft 2. A telescopic component 6 is also provided between the swing gripper 4 and the housing 1 to adjust the distance between the two sets of swing grippers 4. At least two sets of telescopic components 6 are connected to the side of the swing gripper 4 away from the rotating shaft 2. The two sets of telescopic components 6 connected to the same set of swing grippers 4 are arranged vertically opposite each other at intervals. The two sets of telescopic components 6 limit the horizontal position of the swing gripper 4 to enhance the limiting strength and accuracy of the swing gripper 4. A detachable component 8 is provided at the explosion-proof cover 7 and the telescopic component 6 so that when the explosion-proof cover 7 is closed on the vent 11, the telescopic component 6 is detached from the housing 1. The detachable component 8 is installed on the housing 1. A clamping component 9 is provided on the swing gripper 3 to clamp and stop the rotating shaft 2 with the two sets of swing grippers 4. The clamping component 9 is connected to the telescopic component 6. When the telescopic component 6 detaches from the housing 1, the clamping component 9 can drive the two sets of swinging jaws 4 to stop the rotating shaft 2. This reduces the vibration amplitude of the rotating shaft 2 and shortens the vibration time of the rotating shaft 2, reducing the probability of the rotating shaft 2 breaking due to rapid vibration, so as to protect the external equipment connected to the servo motor, thereby further reducing the damage caused by the explosion of the servo motor.

[0038] Reference Figure 3The swing gripper 4 has an arc-shaped groove 41 on its side wall facing the rotating shaft 2 to facilitate clamping the rotating shaft 2. Rolling balls 10 are mounted on the groove wall of the arc-shaped groove 41, and these balls 10 rotate and abut against the peripheral wall of the rotating shaft 2. When the rotating shaft 2 is operating normally, the balls on the swing gripper 4 roll along with the rotating shaft 2, limiting the position of the rotating shaft 2 while reducing friction with it, thereby supporting and limiting the rotating shaft 2 and reducing the probability of deformation.

[0039] Reference Figure 3 and Figure 4 The telescopic component 6 includes a telescopic rod 61 and an adjusting screw 62; The telescopic rod 61 includes a connecting rod segment 611 and an adjusting rod segment 612. One end of the adjusting rod segment 612 is hinged to the swing clamp 3, and the other end of the adjusting rod segment 612 is coaxially slidably sleeved on one end of the connecting rod segment 611. One end of the adjusting screw 62 is hinged to the housing 1, and the other end of the adjusting screw 62 is coaxially threaded to the other end of the connecting rod segment 611, thereby adjusting the length of the entire telescopic component 6 to facilitate the adjustment of the position of the swing clamp 4. The shock-absorbing spring 5 is coaxially sleeved on the connecting rod segment 611, with both ends abutting against the adjusting screw 62 and the adjusting rod segment 612 respectively.

[0040] When the rotating shaft 2 rotates and vibrates, the swing gripper 4 vibrates accordingly, and the position of the swing gripper 4 shakes slightly, causing the adjusting rod segment 612 to slide along the axis of the connecting rod segment 611. Since the adjusting rod segment 612 presses against the damping spring 5, the damping spring 5 extends and retracts with the vibration of the rotating shaft 2, thereby damping the vibration of the rotating shaft 2 and reducing the vibration amplitude of the rotating shaft 2.

[0041] In addition, such as Figure 5 As shown, the same swing gripper 4 is connected to one of the sets of telescopic rods 61, and the end of the swing gripper 4 away from the other set of telescopic rods 61 is inclined in the direction away from the other set of telescopic rods 61. The swing gripper 4 is horizontally slidably connected to the swing clamp seat 3, so that the swing gripper 4 is subject to external forces in three directions to limit the position of the swing gripper 4. The two sets of swing grippers 4 simultaneously abut against the peripheral wall of the rotating shaft 2, so that the four radial directions of the rotating shaft 2 are limited, so as to strengthen the support of the radial position of the rotating shaft 2 and the multi-directional shock absorption of the rotating shaft 2, shorten the vibration time of the rotating shaft 2, and reduce the deformation probability of the rotating shaft 2.

[0042] Reference Figure 2 and Figure 3 The detachable component 8 includes a detachable main rod 81, a limiting baffle 82, a hinged connecting rod 83, a hinged rotating ring 84, and a reset component 85.

[0043] The swing gripper 4 has a detachable groove 13 on the inner wall of the housing 1 opposite to the rotating shaft 2, which allows the detachable main rod 81 to slide along the axis parallel to the rotating shaft 2. The limiting baffle 82 is vertically installed at the bottom of the detachable groove 13 and is located on the side of the detachable main rod 81 opposite to the explosion-proof cover 7. The hinged connecting rod 83 is arranged parallel to the rotating shaft 2, with one end fixed to the side wall of the detachable main rod 81 facing the limiting baffle 82, and the other end of the hinged connecting rod 83 slides through the limiting baffle 82. The hinged rotating ring 84 is located on the side of the limiting baffle 82 opposite to the detachable main rod 81 and is coaxially rotated on the hinged connecting rod 83. The adjusting screw 62 is fixedly connected to the hinged rotating ring 84. The reset component 85 is located between the detachable main rod 81 and the explosion-proof cover 7 and is connected to the detachable main rod 81 and the explosion-proof cover 7, so that when the explosion-proof cover 7 is closed at the vent 11, the reset component 85 drives the detachable main rod 81 to slide horizontally in the direction close to the explosion-proof cover 7. Since the limiting baffle 82 restricts the position of the hinge link 83, the hinge ring 84 is disengaged from the hinge link 83, and the telescopic component 6 is disengaged from the housing 1, which facilitates the subsequent clamping component 9 to drive the swing gripper 4 to clamp the stop shaft 2.

[0044] Additionally, the reset component 85 includes a reset spring 851 and a reset slider 852.

[0045] The return spring 851 is arranged along the sliding direction of the detachable main rod 81 and is located on the side of the detachable main rod 81 opposite to the hinged connecting rod 83. The return spring 851 is located in the detachable slide groove 13, and its two ends are respectively connected and fixed to the detachable main rod 81 and the groove wall of the detachable slide groove 13. The return spring 851 is in the extended state when the servo motor is working normally.

[0046] The guide hole 12 is located above the detachable slide groove 13 and communicates with it. The reset slider 852 is located on the side of the detachable main rod 81 away from the hinged connecting rod 83. The bottom end of the reset slider 852 is located inside the detachable slide groove 13, and the top end of the reset slider 852 slides through the detachable slide groove 13 and is located inside the guide hole 12. The reset slider 852 and the side wall of the detachable main rod 81 away from the hinged connecting rod 83 and the side wall of the detachable slide groove 13 slide vertically in contact. The reset slider 852 is provided with a push bar 853 that abuts against the guide post 101. The push bar 853 is located inside the guide hole 12.

[0047] When the guide post 101 is inserted into the guide hole 12, the guide post 101 abuts against the push bar 853 and can push the reset slider 852 to slide vertically upward by pushing the push bar 853 until the reset slider 852 rises away from the detachable main rod 81. At the same time, the reset spring 851 retracts and drives the detachable main rod 81 to slide in the direction close to the explosion-proof cover 7, so as to realize the separation of the telescopic part 6 from the housing 1.

[0048] Reference Figure 3 and Figure 5The clamping component 9 includes a clamping plate 91, an elastic clamping bar 92, and a clamping spring 93.

[0049] Each of the two sets of swing grippers 4 has horizontally arranged clamping grooves 42 on its sidewall facing the rotating shaft 2. A clamping plate 91 is located within the clamping grooves 42 and is slidably connected to the swing grippers 4 in a direction close to or away from the rotating shaft 2. A connecting groove 43 communicating with the clamping grooves 42 is provided on the sidewall facing the detachable main rod 81 of the swing grippers 4. An adjusting rod segment 612 passes through the connecting groove 43 and is hinged to the clamping plate 91. An elastic clamping strip 92 is installed on the side of the clamping plate 91 facing the rotating shaft 2 to facilitate clamping the rotating shaft 2. A clamping spring 93 is horizontally arranged in a direction perpendicular to the axis of the rotating shaft 2, with both ends connected to the clamping plates 91 within the two sets of swing grippers 4. When the servo motor is in normal operation, the clamping spring 93 is in an extended state. When the telescopic component 6 disengages from the housing 1, the clamping spring 93 retracts, causing the clamping plate 91 to move towards the rotating shaft 2. The elastic clamping bar 92 clamps the rotating shaft 2 until it stops. The elastic clamping bar 92 clamping the rotating shaft 2 not only minimizes the swaying amplitude of the rotating shaft 2 but also shortens the swaying time, reducing the probability of the rotating shaft 2 breaking.

[0050] In addition, a number of circumferentially spaced clamping protrusions 94 are provided on the peripheral wall of the rotating shaft 2, and clamping grooves 921 are provided on the elastic clamping strip 92 to engage with the clamping protrusions 94. When the elastic clamping strip 92 clamps the rotating shaft 2, the clamping protrusions 94 can increase the friction area and friction direction with the elastic clamping strip 92, so that the clamping protrusions 94 can engage with the clamping grooves 921, thereby shortening the vibration time of the rotating shaft 2 and realizing the rapid clamping of the rotating shaft 2.

[0051] The implementation principle of a servo motor in this application embodiment is as follows: When an explosion occurs inside the servo motor, firstly, the explosion-proof cover 7 rotates vertically to cover the vent 11. During the process of the guide post 101 being inserted into the guide hole 12, it pushes the reset slider 852 to slide upwards vertically until it disengages from the detachable main rod 81. Secondly, the reset spring 851 retracts, causing the detachable main rod 81 to slide in the direction close to the explosion-proof cover 7. The telescopic member 6 disengages from the housing 1. Furthermore, the clamping member 9 drives the elastic clamping strip 92 to clamp the rotating shaft 2 until the rotating shaft 2 is stopped. Finally, the vibration amplitude of the rotating shaft 2 during the explosion is reduced, while the probability of damage to external equipment is reduced, so as to further reduce the damage caused by the servo motor explosion.

[0052] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A servo motor, comprising a housing (1), a stator (102), a rotor (103), a shaft (2), and an end cover (104), wherein the front end of the shaft (2) passes through the end cover (104) at the front end of the housing (1), characterized in that: It also includes a swing clamp (3), which is installed in the cavity of the housing (1) and is provided with two sets of swing jaws (4). The rotating shaft (2) is located between the two sets of swing jaws (4) and the peripheral wall of the rotating shaft (2) rotates and abuts against the swing jaws (4). A shock-absorbing spring (5) is connected between the swing jaws (4) and the housing (1) and a telescopic member (6) is provided for adjusting the distance between the two sets of swing jaws (4). A vent (11) is provided on the housing (1) and an explosion-proof cover (7) is provided at the vent (11). A detachable part (8) is provided at the explosion-proof cover (7) and the telescopic member (6) for disengaging the telescopic member (6) from the housing (1). A clamping part (9) is provided on the swing clamp (3) for clamping the rotating shaft (2) with the two sets of swing jaws (4). The clamping member (9) includes a clamping plate (91), an elastic clamping bar (92), and a clamping spring (93); Two sets of swing grippers (4) have horizontally arranged clamping grooves (42) on the sidewalls facing the rotating shaft (2). The clamping plate (91) is located in the clamping groove (42) and is slidably connected to the swing grippers (4) in the direction close to or away from the rotating shaft (2). The side of the clamping plate (91) away from the rotating shaft (2) is connected to the telescopic member (6). The elastic clamping strip (92) is installed on the side of the clamping plate (91) facing the rotating shaft (2) and is used to clamp the rotating shaft (2). The clamping spring (93) is arranged horizontally in the direction perpendicular to the axis of the rotating shaft (2) and its two ends are respectively connected to the clamping plate (91) in the two sets of swing grippers (4). The clamping spring (93) is used to drive the clamping plate (91) to clamp the rotating shaft (2) in the direction close to the rotating shaft (2).

2. A servo motor according to claim 1, characterized in that: The swing gripper (4) has an arc-shaped clamping groove (41) on the side wall facing the rotating shaft (2) for clamping the rotating shaft (2). Abutting balls (10) are rolled on the groove wall of the arc-shaped clamping groove (41), and the abutting balls (10) rotate and abut against the peripheral wall of the rotating shaft (2).

3. A servo motor according to claim 1, characterized in that: The swing gripper (4) is connected to at least two sets of telescopic components (6) on the side away from the rotating shaft (2), and the two sets of telescopic components (6) connected to the same set of swing grippers (4) are arranged vertically opposite each other at intervals.

4. A servo motor according to claim 3, characterized in that: The telescopic component (6) includes a telescopic rod (61) and an adjusting screw (62). One end of a set of telescopic rods (61) is hinged to the swing clamp (3). The other end of a set of telescopic rods (61) is inclined in a direction away from the other set of telescopic rods (61) and coaxially threaded onto one end of the adjusting screw (62). The other end of the adjusting screw (62) is hinged to the housing (1).

5. A servo motor according to claim 4, characterized in that: The telescopic rod (61) includes a connecting rod section (611) and an adjusting rod section (612). The connecting rod section (611) is connected to the adjusting screw (62). The adjusting rod section (612) is hinged to the swing clamp (3) and slidably sleeved on the connecting rod section (611). The shock-absorbing spring (5) is coaxially sleeved on the connecting rod section (611) and its two ends abut against the adjusting screw (62) and the adjusting rod section (612) respectively.

6. A servo motor according to claim 1, characterized in that: The explosion-proof cover (7) is located between the swing clamp (3) and the stator (102) and rotates vertically to cover the vent (11). The explosion-proof cover (7) is hinged to the housing (1) on the side facing the stator (102). A guide post (101) is provided on the side of the explosion-proof cover (7) away from the stator (102). A guide hole (12) for inserting the guide post (101) is provided on the inner wall of the housing (1) near the vent (11).

7. A servo motor according to claim 6, characterized in that: The detachable component (8) includes a detachable main rod (81), a limiting baffle (82), a hinged connecting rod (83), a hinged rotating ring (84), and a reset component (85); The detachable main rod (81) is horizontally slidably connected to the inner wall of the housing (1) and located on the side of the explosion-proof cover (7) near the swing gripper (4). The limiting baffle (82) is located on the side of the detachable main rod (81) away from the explosion-proof cover (7). The hinged connecting rod (83) is horizontally installed on the detachable main rod (81) and one end slides through the limiting baffle (82). The hinged rotating ring (84) is located on the side of the limiting baffle (82) away from the detachable main rod (81) and is coaxially rotated and sleeved on the hinged connecting rod (83). The hinged rotating ring (84) is connected to the telescopic member (6). The reset member (85) is used to drive the detachable main rod (81) to slide horizontally in the direction close to the explosion-proof cover (7).

8. A servo motor according to claim 7, characterized in that: The reset component (85) includes a reset spring (851) and a reset slider (852). The reset spring (851) is arranged along the sliding direction of the detachable main rod (81). The two ends of the reset spring (851) are respectively connected to the detachable main rod (81) and the housing (1). The reset slider (852) is slidably installed in the guide hole (12) in the vertical direction. The end of the reset slider (852) away from the explosion-proof cover (7) is vertically slidably abutted against the detachable main rod (81). The guide post (101) is inserted into the guide hole (12) and can push the reset slider (852) to slide vertically upward until the reset slider (852) rises away from the detachable main rod (81).

9. A servo motor according to claim 1, characterized in that: The rotating shaft (2) has a number of circumferentially spaced clamping protrusions (94) on its peripheral wall, and the elastic clamping strip (92) has clamping grooves (921) that engage with the clamping protrusions (94).

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