Power supply protection device of stepping machine

Abstract

The invention relates to the technical field of stepping machines, in particular to a stepping machine power supply protection device which comprises a rack which is independently and fixedly arranged. The power shaft rotates on the rack in the vertical direction; annular grooves are formed in the middle sections of the power shafts; the middle section of the power shaft is further provided with two receding grooves distributed in the circumferential direction, the two receding grooves extend in the vertical direction, and the tops of the two receding grooves communicate with the annular groove. At least one side of the abdicating groove is an inclined surface; the motor is used for driving the power shaft to rotate; the sliding block slides on the rack in the vertical direction; a follow-up rod is arranged on the sliding block, and the end of the follow-up rod extends into the annular groove. The bottom end of the first spring abuts against the sliding block, the top end of the first spring abuts against the rack, and the first spring is always in a compressed state; and the mounting arm is fixedly mounted at the bottom of the sliding block and used for mounting a cutter. According to the invention, the problem that the power supply system is easy to overheat because the working state of the motor in the existing stepping machine power supply system is unstable can be effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of stepper machines, and in particular to a power supply protection device for a stepper machine. Background Art

[0002] Industrial stepper is a kind of equipment used for coil processing. Its main function is to punch holes, slots or special shapes in continuous materials at set lengths and intervals through jump cutting and asynchronous cutting technology. Jump cutting usually requires processing features with different spacings on the coil, such as two holes that need to be connected are arranged in a pattern of 10cm, 2cm, 10cm, 2cm...

[0003] In the existing related technologies, for occasions with smaller rolls of materials such as tapes, the power source of the stepper machine is usually driven by a smaller motor system. However, due to the special working requirements of jump cutting, the motor speed needs to be switched continuously. Under this unstable working state, the heat generated by the motor will increase, causing the power supply system of the stepper machine to frequently overheat, shut down, or even burn out, affecting the safety of the power supply system of the stepper machine. Summary of the invention

[0004] The invention provides a stepper machine power supply protection device, which can effectively solve the problem that the motor working state in the existing stepper machine power supply system is unstable and causes the power supply system to be easily overheated.

[0005] The present invention provides a stepper machine power supply protection device, comprising: Rack, independent fixed setting; The power shaft rotates in the vertical direction on the frame; the middle section of the power shaft is provided with an annular groove; the middle section of the power shaft is also provided with two circumferentially distributed clearance grooves, and the two clearance grooves extend vertically, and the tops are connected with the annular groove; at least one side of the clearance groove is an inclined surface; A motor, used for driving the power shaft to rotate; The sliding block slides on the frame in a vertical direction; a follower rod is arranged on the sliding block, and the end of the follower rod extends into the annular groove; The first spring has a bottom end against the sliding block and a top end against the frame and is always in a compressed state; The mounting arm is fixedly mounted on the bottom of the sliding block and is used to mount the tool.

[0006] Further, the power shaft includes a core shaft and a sleeve; The mandrel rotates in a vertical direction on the frame, and a ring groove is arranged on the mandrel; a clearance groove is arranged on the mandrel; The sleeve is sleeved on the bottom end of the mandrel and rotates synchronously with the mandrel; the sleeve is provided with an extension section extending upward, and the top of the extension section is flush with the lowest side of the annular groove; another clearance groove is provided in the extension section; and a convex block corresponding vertically to the extension section is also provided at the bottom end of the sleeve; A switching block is arranged on the sliding block, and the switching block performs sliding motion close to and away from the power shaft; a follower rod is arranged on the switching block; a second spring is arranged between the switching block and the sliding block, and the second spring is located on the side of the switching block away from the power shaft.

[0007] Furthermore, the bottom end of the core shaft is spline-connected with the bottom end of the sleeve.

[0008] Furthermore, the end surface of the switching block always extends to the outside of the sliding block.

[0009] Furthermore, the switching block includes a sliding seat and a friction strip, the sliding seat slides on the sliding block, the friction strip is detachably mounted on the sliding block, and the end surface of the friction strip extends to the outside of the sliding block.

[0010] Furthermore, a plurality of second guide rods distributed vertically are arranged in the sliding block, and the switching block is penetrated by all the second guide rods, so that the switching block slides axially along the second guide rods; The height of the second guide rod located at the top is higher than or equal to the height of the follower rod; The height of the second guide rod located at the bottom is lower than or equal to the height of the protrusion.

[0011] Furthermore, a transmission gear is arranged on the power shaft, the transmission gear rotates synchronously with the power shaft, and the transmission gear is located above the annular groove.

[0012] Furthermore, a thrust bearing is arranged at the bottom of the power shaft below the clearance groove, and a self-aligning bearing is arranged at the top of the power shaft above the transmission gear.

[0013] Furthermore, a rotating wheel is provided at the end of the follower rod, and the rotating wheel slides in the annular groove.

[0014] Furthermore, the sliding block is provided with a plurality of first guide rods extending upward and a plurality of third guide rods extending downward, and both the first guide rods and the third guide rods pass through the frame; and the first spring is sleeved on the first guide rod.

[0015] The technical solution of the present invention can achieve the following technical effects: Through the cooperation between the ring groove and two clearance grooves of the power shaft, and the follower rod of the sliding block and the first spring, the device can enable the motor to achieve the jump-cut function while maintaining the same speed, thereby keeping the motor in a stable working state, avoiding overheating of the motor, and further avoiding frequent power failures and shutdowns of the stepper machine due to frequent overheating, and can effectively protect the power supply circuit of the stepper machine. The device can also adjust the positions of the two clearance grooves, so that the device can adapt to different jump-cut requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of the power supply protection device of the stepper machine in the present invention; Figure 2 It is a structural schematic diagram of the power supply protection device of the stepping machine in the present invention (part of the frame is hidden); Figure 3 It is a side view of the power supply protection device of the stepper machine in the present invention; Figure 4 A diagram showing the connection relationship between the follower rod and the power shaft in the present invention; Figure 5 This is a component disassembly diagram of the power shaft in the present invention; Figure 6 A structural relationship diagram of the switching block when the switching block is not pushed by the protrusion in the present invention; Figure 7 A structural relationship diagram of the switching block when being pushed by the protrusion in the present invention; Figure 8 It is a structural schematic diagram of the sliding block in the present invention; Fig. 9 It is a component split diagram of the switching block in the present invention; Figure numerals: 1, frame; 2, power shaft; 2a, core shaft; 2b, sleeve; 21, ring groove; 22, give way groove; 23, extension section; 24, protrusion; 25, transmission gear; 3, motor; 4, sliding block; 41, follower rod; 42, switching block; 42a, sliding seat; 42b, friction strip; 43, second spring; 44, first guide rod; 45, second guide rod; 46, third guide rod; 5, first spring; 6, mounting arm. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside”, etc., are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] The whole stepper machine is usually equipped with passive rollers, active rubber rollers, stripping plates, jump cutting devices, winding devices and other components to process products. Specifically, after the coil passes through the upper passive roller and active rubber roller, it is peeled off by the stripping plate so that the base paper can be recycled. Subsequently, the coil is punched into products of the required size by a tool under the operation of the jump cutting device, and is arranged in an orderly manner on the new base paper, and finally the finished product is wound up by the finished product winding device.

[0022] The present invention relates to a power supply protection device for a stepper machine, which is mainly used for a tripping device in a stepper machine, and can keep the motor in a stable working state, thereby preventing the motor from overheating and the stepper machine from frequent power failures and shutdowns due to frequent overheating, and can effectively protect the power supply circuit of the stepper machine. Figures 1 to 4 As shown, including: The rack 1 is independently fixed on the ground or other fixed positions. The rack 1 is used to carry other components of the device and is also a part of the rack of the jump cutting device. The power shaft 2 rotates in the vertical direction on the frame 1, and its rotation axis is its own axis; an annular groove 21 is arranged in the middle section of the power shaft 2, and the annular groove 21 is arranged around the circumference of the power shaft 2 for a full circle; the power shaft 2 is also provided with two circumferentially distributed paving grooves 22 in the middle section of the power shaft 2, and the two paving grooves 22 extend vertically, and the tops are connected with the annular groove 21; at least one side of the paving groove 22 is an inclined surface; The motor 3 is connected to the power shaft 2 through a gear set transmission, a chain transmission, etc., and is used to drive the power shaft 2 to rotate; The sliding block 4 slides on the frame 1 in the vertical direction; a follower rod 41 is provided on the sliding block 4, and the end of the follower rod 41 extends into the annular groove 21; The first spring 5 has its bottom end against the sliding block 4 and its top end against the frame 1 and is always in a compressed state; The mounting arm 6 is fixedly mounted on the bottom of the sliding block 4 and is used for mounting a tool.

[0023] The specific working principle of this device is as follows: In the standby state, the two clearance grooves 22 will be offset from the follower rod 41, so the follower rod 41 can only slide in the annular groove 21. Under the limit of the side wall of the annular groove 21, the sliding block 4 will be at the top, and the first spring 5 will be in the most compressed state, and the mounting arm 6 will also be lifted upward, and the coil can be sent from under the cutter. As the motor 3 drives the power shaft 2 to rotate, a clearance groove 22 will align with the follower rod 41. At this time, without the limit of the side wall of the annular groove 21, the sliding block 4 will move downward quickly under the push of the first spring 5, so that the cutter of the mounting arm 6 punches out the required shape on the coil, and then as the power shaft 2 rotates, the follower rod 41 will climb back into the annular groove 21 along the inclined surface of the clearance groove 22, and then return to the standby state. After that, when the other clearance groove 22 reaches the position aligned with the follower rod 41, the above process is repeated again to complete a complete jump cutting process.

[0024] In this device, the distance of the jump cut can be controlled by the rotation speed of the motor 3 and the position of the two clearance grooves 22. For example, if the jump cut distance requirement is 2 cm and 1 cm (i.e., 2:1), then as long as the outer angle and inner angle formed by the two clearance grooves 22 in the circumferential direction of the power shaft 2 are 240° and 120° respectively (i.e., also 2:1), and then the relationship between the rotation speed of the motor 3 and the coil transport speed is controlled to achieve one rotation of the power shaft 2 and 3 cm of forward movement of the coil, the jump cut requirement in the above example can be achieved. It can be seen that under the action of this device, the motor 3 only needs to maintain a fixed speed during the entire processing process. Compared with the mode in which the speed needs to be frequently switched in the traditional device, the motor 3 under this device works more stably, so the heat generated by the motor 3 and the control accuracy requirements of the device can be greatly reduced.

[0025] Different products naturally have different jump cutting distance requirements. In order to meet these different requirements, it is possible to process multiple power shafts 2 with different outer and inner angle ratios of the clearance grooves 22 and then replace the power shafts 2. However, this method obviously has too high processing and storage costs. Therefore, the present device provides a power shaft 2 structure with adjustable clearance grooves 22 positions, such as Figure 5As shown: The power shaft 2 includes a core shaft 2a and a sleeve 2b; The mandrel 2a rotates in the vertical direction on the frame 1, and the annular groove 21 is provided on the mandrel 2a; a clearance groove 22 is provided on the mandrel 2a; The sleeve 2b is sleeved on the bottom end of the mandrel 2a and rotates synchronously with the mandrel 2a; the sleeve 2b is provided with an extension section 23 extending upward, the top of the extension section 23 is flush with the lowest side of the annular groove 21; another clearance groove 22 is provided on the extension section 23; and a protrusion 24 vertically corresponding to the extension section 23 is also provided at the bottom end of the sleeve 2b. By rotating the sleeve 2b, the angle between the two clearance grooves 22 can be changed to meet different jump cutting requirements.

[0026] Of course, the above structure will make the two clearance grooves 22 not in the same circumferential surface. Therefore, if the original sliding block 4 structure is simply used, the function of moving down at both clearance grooves 22 cannot be achieved. Therefore, for the specially designed power shaft 2, the following structure needs to be set on the sliding block 4, such as Figure 8 As shown: A switching block 42 is arranged on the sliding block 4, and the switching block 42 performs sliding motion towards and away from the power shaft 2; a follower rod 41 is arranged on the switching block 42; a second spring 43 is arranged between the switching block 42 and the sliding block 4, and the second spring 43 is located on the side of the switching block 42 away from the power shaft 2.

[0027] The specific working process and principle of the above structure are as follows: Figure 6 As shown, in the standby state, the two give way grooves 22 will be offset from the follower rod 41, and the switching block 42 and the protrusion 24 will also be offset and will not affect each other. Then, under the push of the second spring 43, the switching block 42 will be close to the power shaft 2, and the end of the follower rod 41 will be completely extended into the annular groove 21.

[0028] If the power shaft 2 rotates to the clearance groove 22 of the core shaft 2a and is aligned with the follower rod 41, the sliding block 4 can be lowered as described above, thereby driving the tool to descend, and then rise again to reset.

[0029] And before turning to the make way groove 22 of sleeve 2b, as Figure 7 As shown, the protrusion 24 will press against the switching block 42, so that the switching block 42 is away from the power shaft 2. At this time, the end of the follower rod 41 will move out of the annular groove 21 to the top of the extension section 23, and the sliding block 4 will remain stationary under the obstruction of the top of the extension section 23; until the yield groove 22 of the sleeve 2b is aligned with the follower rod 41, at this time the sliding block 4 will descend and drive the tool to descend, and then the sliding block 4 will be brought back to the highest point by the inclined surface of the yield groove 22, so that the end of the follower rod 41 returns to the top of the extension section 23.

[0030] Then, as the power shaft 2 rotates, the protrusion 24 will leave the switching block 42. At this time, under the push of the second spring 43, the switching block 42 will approach the power shaft 2, and the end of the follower rod 41 will completely extend into the annular groove 21, returning to the original state.

[0031] The core shaft 2a and the sleeve 2b can be connected by conventional screws, but since the core shaft 2a and the sleeve 2b need to be adjustable, the traditional screw connection method will limit the adjustable angle between the core shaft 2a and the sleeve 2b. Therefore, in the present device, it is preferred to use a spline connection between the bottom end of the core shaft 2a and the bottom end of the sleeve 2b, which can not only increase the adjustable angle range, but also ensure the torque transmission between the two, thereby ensuring the reliability of the synchronous rotation of the core shaft 2a and the sleeve 2b.

[0032] It is preferred to control the dimensions of each component so that the end face of the switching block 42 always extends to the outside of the sliding block 4 when the switching block 42 is close to or away from the power shaft 2, thereby ensuring that the protrusion 24 is always in contact with the switching block 42 and will not contact the side of the sliding block 4 to affect the movement of the sliding block 4, thereby ensuring the reliability of the device.

[0033] Since the protrusion 24 needs to make more contact with the switching block 42, which may cause wear, the present device preferably sets the switching block 42 into a split structure, such as Fig. 9 As shown, it includes a sliding seat 42a and a friction strip 42b, the sliding seat 42a slides on the sliding block 4, the friction strip 42b is detachably mounted on the sliding block 4 by screw fixing, and the end face of the friction strip 42b extends to the outside of the sliding block 4, and the extended face rubs against the protrusion 24, and the contact surface of the friction strip 42b and the protrusion 24 should be carburized or quenched to improve its wear resistance. The follower rod 41 can be directly fixed on the sliding seat 42a or the friction strip 42b as required.

[0034] It is preferred to set a plurality of second guide rods 45 distributed up and down in the sliding block 4, and the switching block 42 is passed through by all the second guide rods 45, so that the switching block 42 slides axially along the second guide rods 45. The plurality of second guide rods 45 can better distribute the force of the switching block 42 to ensure that the switching block 42 can slide more smoothly.

[0035] It is preferred that the height of the second guide rod 45 located at the top is higher than or equal to the height of the follower rod 41, and the height of the second guide rod 45 located at the bottom is lower than or equal to the height of the protrusion 24, so that the spacing between the upper and lower second guide rods 45 is not less than the distance between the follower rod 41 and the protrusion 24, so that the force of the switching block 42 can be located between the upper and lower second guide rods 45, thereby effectively avoiding the flipping tendency of the switching block 42 when it moves, and further ensuring the movement stability of the switching block 42.

[0036] The power shaft 2 is usually provided with a transmission gear 25 for transmission connection with the motor 3, and the transmission gear 25 and the power shaft 2 are connected by a key to achieve synchronous rotation. The transmission gear 25 is preferably located above the annular groove 21, where it can be as close to the follower rod 41 as possible while avoiding affecting the movement of the follower rod 41, so that the instability of the power shaft 2 caused by the downward pressure of the follower rod 41 on one side of the power shaft 2 can be offset to the greatest extent, especially when the power shaft 2 and the motor 3 are connected by a belt, the tight belt will generate a pulling force on the power shaft 2 away from the sliding block 4, and the torque generated on the power shaft 2 will offset the torque generated by the downward pressure of the follower rod 41, thereby ensuring the stable rotation of the power shaft 2.

[0037] A thrust bearing is arranged at the bottom of the power shaft 2 below the clearance groove 22. The thrust bearing can bear a large axial load, so that when the follower rod 41 presses down one side of the power shaft 2, the downward force transmitted to the power shaft 2 can be well borne by the thrust bearing. The inner ring end face of the thrust bearing can directly contact the sleeve 2b, thereby achieving axial fixation of the sleeve 2b.

[0038] A self-aligning bearing is arranged at the top of the power shaft 2 above the transmission gear 25. The self-aligning bearing can withstand a large radial load. In this way, when the follower rod 41 presses down one side of the power shaft 2, the whole will have a large overturning tendency. The self-aligning bearing can well withstand the radial load on the top of the power shaft 2 generated thereby.

[0039] The power shaft 2 can be installed through the lower bearing seat, the upper mounting cylinder and the cover. The lower bearing seat is directly mounted on the frame 1, and the outer ring of the thrust bearing is clamped on the lower bearing seat, which can directly transmit the pressure of the follower rod 41 pressing down the power shaft 2 to the frame 1, ensuring the stability of the installation of the power shaft 2. The bottom end of the upper mounting cylinder is fixedly connected to the top surface of the lower bearing seat, and the upper mounting cylinder is provided with a vertical through hole, and the power shaft 2 is arranged in the through hole; the outer ring of the self-aligning bearing is clamped on the top of the upper mounting cylinder. The cover is fixedly mounted on the top of the upper mounting cylinder to block the through hole of the upper mounting cylinder.

[0040] Preferably, a rotating wheel is provided at the end of the follower rod 41 extending into the annular groove 21, and the rotating wheel slides in the annular groove 21. There can be multiple rotating wheels, and they are affixed together in pairs along the axial direction, so that the follower rod 41 can roll in the annular groove 21 better.

[0041] Preferably, a plurality of first guide rods 44 extending upward and a plurality of third guide rods 46 extending downward are provided on the sliding block 4, and both the first guide rods 44 and the third guide rods 46 pass through the frame 1. The first guide rods 44 and the third guide rods 46 can well limit the sliding track of the sliding block 4, thereby ensuring the movement track of the tool. The first spring 5 is sleeved on the first guide rod 44 to prevent the first spring 5 from being skewed when compressed and affecting its pushing effect on the sliding block 4.

[0042] The mounting arm 6 can be directly mounted on the bottom of the third guide rod 46, and the third guide rod 46 is mounted on the sliding block 4 by screwing, so that the height of the mounting arm 6 can be adjusted within a certain range, that is, the height of the tool can be adjusted. The mounting arm 6 includes a tool holder and a cover plate, and the tool is clamped between the tool holder and the cover plate.

[0043] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A stepper machine power supply protection device, characterized in that: include: A frame (1), independently fixed; A power shaft (2) rotates on the frame (1) in a vertical direction; a ring groove (21) is arranged in the middle section of the power shaft (2); two circumferentially distributed clearance grooves (22) are also arranged in the middle section of the power shaft (2), and both of the two clearance grooves (22) extend in the vertical direction, and the tops are connected to the ring groove (21); at least one side of the clearance groove (22) is an inclined surface; A motor (3) for driving the power shaft (2) to rotate; A sliding block (4) slides on the frame (1) in a vertical direction; a follower rod (41) is provided on the sliding block (4), and an end of the follower rod (41) extends into the annular groove (21); A first spring (5), the bottom end of which abuts against the sliding block (4), the top end of which abuts against the frame (1), and the first spring (5) is always in a compressed state; The mounting arm (6) is fixedly mounted on the bottom of the sliding block (4) and is used for mounting a tool.

2. The stepper machine power supply protection device according to claim 1, characterized in that: The power shaft (2) comprises a core shaft (2a) and a sleeve (2b); The core shaft (2a) rotates in a vertical direction on the frame (1); the annular groove (21) is arranged on the core shaft (2a); and a clearance groove (22) is arranged on the core shaft (2a); The sleeve (2b) is sleeved on the bottom end of the core shaft (2a) and rotates synchronously with the core shaft (2a); the sleeve (2b) is provided with an extension section (23) extending upward, and the top of the extension section (23) is flush with the lowest side surface of the annular groove (21); another clearance groove (22) is provided in the extension section (23); and a protrusion (24) vertically corresponding to the extension section (23) is also provided at the bottom end of the sleeve (2b); A switching block (42) is arranged on the sliding block (4), and the switching block (42) performs sliding movement towards and away from the power shaft (2); the follower rod (41) is arranged on the switching block (42); a second spring (43) is arranged between the switching block (42) and the sliding block (4), and the second spring (43) is located on a side of the switching block (42) away from the power shaft (2).

3. The stepper machine power supply protection device according to claim 2, characterized in that: The bottom end of the core shaft (2a) is spline-connected to the bottom end of the sleeve (2b).

4. The stepper machine power supply protection device according to claim 2, characterized in that: The end surface of the switching block (42) always extends to the outside of the sliding block (4).

5. The stepper machine power supply protection device according to claim 4, characterized in that: The switching block (42) comprises a sliding seat (42a) and a friction strip (42b), wherein the sliding seat (42a) slides on the sliding block (4), and the friction strip (42b) is detachably mounted on the sliding block (4), and an end surface of the friction strip (42b) extends outward from the sliding block (4).

6. The stepper machine power supply protection device according to claim 2, characterized in that: A plurality of second guide rods (45) distributed vertically are arranged in the sliding block (4), and the switching block (42) is penetrated by all the second guide rods (45), so that the switching block (42) slides axially along the second guide rods (45); The height of the second guide rod (45) located at the top is higher than or equal to the height of the follower rod (41); The height of the second guide rod (45) located below is lower than or equal to the height of the protrusion (24).

7. The stepper machine power supply protection device according to claim 1, characterized in that: The power shaft (2) is provided with a transmission gear (25), the transmission gear (25) rotates synchronously with the power shaft (2), and the transmission gear (25) is located above the annular groove (21).

8. The stepper machine power supply protection device according to claim 7, characterized in that: A thrust bearing is arranged at the bottom of the power shaft (2) below the clearance groove (22), and a self-aligning bearing is arranged at the top of the power shaft (2) above the transmission gear (25).

9. The stepper machine power supply protection device according to claim 1, characterized in that: A rotating wheel is provided at the end of the follower rod (41), and the rotating wheel slides in the annular groove (21).

10. The stepper machine power supply protection device according to claim 1, characterized in that: The sliding block (4) is provided with a plurality of first guide rods (44) extending upward and a plurality of third guide rods (46) extending downward, wherein the first guide rods (44) and the third guide rods (46) both pass through the frame (1); and the first spring (5) is sleeved on the first guide rods (44).

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