A servo stop mechanism

Abstract

This invention provides a servo stop mechanism, belonging to the field of servo controller technology. This invention adds a coupling to connect the drive shaft and the servo's output shaft. An elastic element is installed inside the coupling; the elastic deformation of this element absorbs the energy of the impact load on the lever, effectively preventing the impact force from being transmitted to the gears inside the servo, thus protecting the gears and extending the servo's service life.

Description

Technical Field

[0001] This utility model belongs to the field of servo controller technology, specifically relating to a servo motor stop mechanism. Background Technology

[0002] In the logistics field, servo motor stop mechanisms are mainly installed on conveyor belts to adjust the direction of goods transport and achieve the purpose of goods sorting. A servo motor stop mechanism mainly consists of a servo motor, a lever, and a drive shaft. The lever is mounted on the output shaft of the servo motor via the drive shaft, and the drive shaft is rigidly connected to the output shaft of the servo motor. During use, impact loads from the lever are directly transmitted to the gears inside the servo motor through the drive shaft and the output shaft. Under impact loads, the gears are prone to damage or even breakage, leading to servo motor failure and affecting the normal operation of the servo motor stop mechanism.

[0003] Therefore, it is necessary to provide a servo stop mechanism to solve the above problems. Utility Model Content

[0004] This utility model provides a servo stop mechanism, which adds a coupling to connect the drive shaft and the output shaft of the servo. The coupling is equipped with an elastic element, which absorbs the energy of the impact load on the lever through the elastic deformation of the elastic element. This can effectively prevent the impact force from being transmitted to the gears inside the servo, thus protecting the gears and extending the service life of the servo. This effectively solves at least one of the technical problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model is implemented as follows:

[0006] A servo stop mechanism, comprising:

[0007] Servo motor, including output shaft;

[0008] A lever assembly, including a lever and a drive shaft;

[0009] A coupling is provided in which the drive shaft and the output shaft are connected. The lever is installed at the end of the drive shaft away from the coupling. The coupling includes a housing, an elastic element, and a ball. A receiving groove is provided inside the housing, and the elastic element and the ball are both received in the receiving groove.

[0010] A connecting member is provided at one end of the drive shaft that is connected to the coupling. The connecting member is sleeved on the periphery of the housing. The inner wall of the connecting member protrudes towards the coupling to form a pressing block. The housing has a notch corresponding to the position of the pressing block. The notch connects the receiving groove to the outside. The pressing block is inserted into the receiving groove through the notch. The elastic element is a preload spring. The ball is disposed at the end of the elastic element and sandwiched between the elastic element and the pressing block.

[0011] As a preferred improvement, the servo also includes a servo body for driving the output shaft. The lever assembly also includes a housing, which is fixed to the servo body and sleeved around the drive shaft to protect it. The top of the housing has a perforation through which the top of the drive shaft passes and connects to the lever. The lever is exposed outside the housing.

[0012] As a preferred improvement, the number of extrusion blocks is one, and the two ends of the elastic element abut against the opposite sides of the extrusion block through two spheres.

[0013] As a preferred improvement, there are two extrusion blocks, distributed on opposite sides of the connector, which divide the receiving groove into two symmetrical sub-grooves. Each sub-groove contains one elastic element, and each elastic element has two ends abutting against the two extrusion blocks through a ball.

[0014] As a preferred improvement, the housing includes a base and a top cover, which cooperate to form the receiving groove. The base includes a fixed column, ribs arranged around the fixed column and spaced apart from the fixed column, and a bottom plate connecting the fixed column and the ribs. The bottom plate connects the bottom ends of the fixed column and the ribs. The fixed column, ribs, and bottom plate are integrally formed. The elastic element and the ball are limited between the fixed column and the ribs.

[0015] As a preferred improvement, the top of the fixed column is provided with a first hole in the direction of bottom, and the bottom of the fixed column is provided with a second hole in the direction of top. The axes of the first hole and the second hole are on the same straight line, and the diameter of the first hole is smaller than the diameter of the second hole. The top of the rib plate protrudes to form a boss, and the top cover is provided with a snap-fit ​​corresponding to the position of the boss. The edge of the top cover is supported on the rib plate, and the center position is supported on the fixed column. The boss is snapped into the snap-fit.

[0016] As a preferred improvement, the output shaft is installed in the second hole, and the top cover is fixed to the output shaft by a screw. The top of the screw is limited on the top cover, and the bottom passes through the top cover and the first hole to fix it to the output shaft.

[0017] As a preferred improvement, the output shaft is connected to the wall of the second bore via a spline.

[0018] As a preferred improvement, the rib plate is provided with a first notch on both sides of the opposite side, which communicates with the receiving groove. The top cover is provided with a second notch at the position corresponding to the first notch. The second notch and the first notch communicate to form the notch. The extrusion block is partially located in the first notch and partially located in the second notch.

[0019] As a preferred improvement, the extrusion block is spaced apart from the walls of the first notch and the second notch.

[0020] The beneficial effects of this utility model are as follows:

[0021] A coupling was added to connect the drive shaft and the output shaft of the servo. The coupling contains an elastic element, which absorbs the energy of the impact load on the lever through elastic deformation. This effectively prevents the impact force from being transmitted to the gears inside the servo, thus protecting the gears and extending the service life of the servo. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram showing the servo stop mechanism provided by this utility model;

[0023] Figure 2 express Figure 1 The exploded view of the servo stop mechanism shown.

[0024] Figure 3 express Figure 2 3D structural diagram of the coupling;

[0025] Figure 4 express Figure 3 Exploded view of the coupling;

[0026] Figure 5 A three-dimensional structural diagram showing the drive shaft;

[0027] Figure 6 A diagram illustrating one possible arrangement of elastic elements;

[0028] Figure 7 A diagram showing another way of setting up the elastic element;

[0029] Figure 8 This diagram illustrates the connection between the drive shaft, output shaft, and coupling. Detailed Implementation

[0030] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0031] Please refer to the following: Figures 1-8 This embodiment provides a servo stop mechanism, including a servo motor 10, a lever assembly 20, and a coupling 30.

[0032] The servo motor 10 adopts a conventional structure in the art, comprising a servo motor body 11 and an output shaft 12. The servo motor body 11 is used to drive the output shaft 12 to rotate. The servo motor body 11 contains a motor, a gear transmission assembly, a circuit module, a control module, and other structures. When the motor is powered on, it transmits power to the output shaft 12 through the gear transmission assembly, driving the output shaft 12 to move. The circuit module is used to enable circuit conduction, and the control module is used to receive control commands and control the operation of the servo motor 10.

[0033] The lever assembly 20 includes a drive shaft 21, a lever 22, and a housing 23.

[0034] The drive shaft 21 and the output shaft 12 are connected by the coupling 30. The lever 22 is installed at the end of the drive shaft 21 away from the coupling 30. The coupling 30 connects the drive shaft 21 and the output shaft 12 into one unit, ensuring that the movements of the drive shaft 21 and the output shaft 12 are consistent. This allows the driving force of the servo motor 10 to be transmitted to the lever 22, causing the lever 22 to move. The lever 22 is located at the node where the goods are diverted on the conveyor belt. The movement of the lever assembly 20 changes the direction of goods transport on the conveyor belt, thus achieving goods sorting.

[0035] The outer casing 23 is fixed to the servo motor body 11 and is fitted around the drive shaft 21 to protect the drive shaft 21. The top of the outer casing 23 is provided with a through hole 231, through which the top of the drive shaft 21 passes and connects to the lever 22, which is exposed outside the outer casing 23.

[0036] The coupling 30 serves to connect and transmit power between the drive shaft 21 and the output shaft 12, and includes a housing 31, an elastic element 32, and a ball 33.

[0037] The housing 31 is provided with a receiving groove 34, and the elastic element 32 and the ball 33 are both received in the receiving groove.

[0038] A connector 211 is provided at one end of the drive shaft 21 that is connected to the coupling 30. The connector 211 is sleeved on the periphery of the housing 31. The inner wall of the connector 211 protrudes towards the coupling 30 to form a pressing block 2110. The housing 31 is provided with a notch 310 corresponding to the position of the pressing block 2110. The notch 310 connects the receiving groove 34 to the outside. The pressing block 2110 is inserted into the receiving groove 34 through the notch 310. The elastic element 32 is a preload spring. The ball 33 is provided at the end of the elastic element 32 and is sandwiched between the elastic element 32 and the pressing block 2110.

[0039] Under normal conditions, the transmission between the drive shaft 21 and the output shaft 12 is achieved through the contact between the elastic element 32 and the compression block 2110. When the lever 22 is subjected to an impact load greater than the preload of the elastic element 32, the compression block 2110 compresses the ball 33, causing the ball 33 to move and compress the elastic element 32, causing the elastic element 32 to deform and absorb the energy of the impact load. This prevents the impact force from being transmitted to the servo motor 10 through the coupling 30 and the output shaft 12, effectively preventing damage to the gears inside the servo motor 10 and extending its service life. After the impact load ends, the elastic element 32 returns to its original position under the action of elastic potential energy, re-driving the compression block 2110 back to its initial state.

[0040] Specifically, such as Figure 6 As shown, the number of the extrusion block 2110 can be one, and the two ends of the elastic member 32 respectively abut against the opposite sides of the extrusion block 2110 through two balls 33; as Figure 7 As shown, the number of the extrusion blocks 2110 can also be two, distributed on opposite sides of the connector 211, dividing the receiving groove 34 into two symmetrical sub-grooves. Each sub-groove is provided with an elastic member 32, and the two ends of each elastic member 32 abut against the two extrusion blocks 2110 through a ball 33.

[0041] The housing 31 includes a base 311 and a top cover 312, which cooperate to form the receiving groove 34.

[0042] The base 311 includes a fixed column 3111, ribs 3112 arranged around the fixed column 3111 and spaced apart from it, and a base plate 3113 connecting the fixed column 3111 and the ribs 3112. The base plate 3113 connects the bottom ends of the fixed column 3111 and the ribs 3112. The fixed column 3111, ribs 3112, and base plate 3113 are integrally formed.

[0043] The fixed column 3111 has a first hole 3114 at the top and a second hole 3115 at the bottom. The axes of the first hole 3114 and the second hole 3115 are on the same straight line, and the diameter of the first hole 3114 is smaller than the diameter of the second hole 3115.

[0044] The top of the rib plate 3112 protrudes to form a boss 3116. The top cover 312 is provided with a slot 3121 corresponding to the boss 3116. The edge of the top cover 312 is supported on the rib plate 3112, and the center is supported on the fixed column 3111. The boss 3116 is engaged in the slot 3121, which can restrict the relative rotation of the top cover 312 and the base 311. There are two bosses 3116, which are symmetrically arranged on opposite sides of the base 311, and the slots 3121 are provided one-to-one with the bosses 3116.

[0045] The output shaft 12 is installed inside the second hole 3115. The top cover 312 is fixed to the output shaft 12 by a screw 40. The top of the screw 40 is limited on the top cover 312, and the bottom passes through the top cover 312 and the first hole 3114 to fix the output shaft 12. After the screw 40 is tightened, the top cover 312, the base 311, and the output shaft 12 are fixed together.

[0046] Furthermore, the output shaft 12 is connected to the hole wall of the second hole 3115 by a spline to maintain the stability of the connection and increase the torque transmission capability.

[0047] The rib plate 3112 is provided with a first notch 3117 communicating with the receiving groove 314 on both sides. The top cover 312 is provided with a second notch 3122 corresponding to the first notch 3117. The second notch 3122 and the first notch 3117 communicate to form the notch 310. The pressing block 2110 is partially located in the first notch 3112 and partially located in the second notch 3122. In order to ensure the mobility of the pressing block 2110, the pressing block 2110 is spaced apart from the hole walls of the first notch 3112 and the second notch 3122.

[0048] Structurally, the drive shaft 21 is connected to the periphery of the coupling 30 via the connector 211, and the output shaft 12 is connected to the center of the coupling 30 via the fixed column 3111. The fixed column 3111 and the rib plate 3112 form the receiving groove 34 at intervals, which can limit and guide the movement of the elastic member 32 and the ball 33, preventing changes in the direction of force from affecting the load absorption effect.

[0049] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of the present invention.

Claims

1. A servo motor stop mechanism, characterized in that, include: Servo motor, including output shaft; A lever assembly, including a lever and a drive shaft; A coupling is provided in which the drive shaft and the output shaft are connected. The lever is installed at the end of the drive shaft away from the coupling. The coupling includes a housing, an elastic element, and a ball. A receiving groove is provided inside the housing, and the elastic element and the ball are both received in the receiving groove. A connecting member is provided at one end of the drive shaft that is connected to the coupling. The connecting member is sleeved on the periphery of the housing. The inner wall of the connecting member protrudes towards the coupling to form a pressing block. The housing has a notch corresponding to the position of the pressing block. The notch connects the receiving groove to the outside. The pressing block is inserted into the receiving groove through the notch. The elastic element is a preload spring. The ball is disposed at the end of the elastic element and sandwiched between the elastic element and the pressing block.

2. The servo stop mechanism according to claim 1, characterized in that, The servo also includes a servo body for driving the output shaft. The lever assembly also includes a housing, which is fixed to the servo body and sleeved around the drive shaft to protect it. The top of the housing has a through hole through which the top of the drive shaft passes and connects to the lever. The lever is exposed outside the housing.

3. The servo stop mechanism according to claim 1, characterized in that, The number of the extrusion block is one, and the two ends of the elastic element are respectively abutted against the opposite sides of the extrusion block by two spheres.

4. The servo stop mechanism according to claim 1, characterized in that, There are two extrusion blocks, distributed on opposite sides of the connector, which divide the receiving groove into two symmetrical sub-grooves. Each sub-groove contains one elastic element, and each elastic element has two ends abutting against the two extrusion blocks through a ball.

5. The servo stop mechanism according to claim 1, characterized in that, The housing includes a base and a top cover, which cooperate to form the receiving groove. The base includes a fixed column, a rib plate arranged around the fixed column and spaced apart from the fixed column, and a bottom plate connecting the fixed column and the rib plate. The bottom plate connects the bottom ends of the fixed column and the rib plate. The fixed column, the rib plate, and the bottom plate are integrally formed. The elastic element and the ball are limited between the fixed column and the rib plate.

6. The servo stop mechanism according to claim 5, characterized in that, The fixed column has a first hole at the top and a second hole at the bottom. The axes of the first hole and the second hole are on the same straight line, and the diameter of the first hole is smaller than that of the second hole. The top of the rib plate protrudes to form a boss. The top cover has a slot corresponding to the position of the boss. The edge of the top cover is supported on the rib plate, and the center position is supported on the fixed column. The boss is engaged in the slot.

7. The servo stop mechanism according to claim 6, characterized in that, The output shaft is installed in the second hole, and the top cover is fixed to the output shaft by screws. The top of the screws is limited on the top cover, and the bottom passes through the top cover and the first hole to fix the output shaft.

8. The servo stop mechanism according to claim 7, characterized in that, The output shaft is connected to the wall of the second bore via a spline.

9. The servo stop mechanism according to claim 5, characterized in that, The rib plate is provided with a first notch on both sides of the opposite side, which communicates with the receiving groove. The top cover is provided with a second notch at the position corresponding to the first notch. The second notch and the first notch communicate to form the notch. The extrusion block is partially located in the first notch and partially located in the second notch.

10. The servo stop mechanism according to claim 9, characterized in that, The extrusion block is spaced apart from the walls of the first and second notches.

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