A through-type stepper linear motor

Abstract

This utility model provides a through-type stepper linear motor, comprising: a base, side plates fixedly connected to the left and right ends of the base, a threaded rod rotatably connected to the center of the top of the side plates, a slider sleeved on the outside of the threaded rod, a stepper motor fixedly connected to the left end of the threaded rod, a fan also mounted in the center of the stepper motor and the side plates, a one-way bearing mounted in the center of the fan, a threaded rod mounted in the center of the one-way bearing, a mounting shell mounted on the outside of the fan, and a rear baffle detachably connected to the right end of the mounting shell. This through-type stepper linear motor, by incorporating a one-way bearing, a first wear plate, and a second wear plate, can effectively prevent the fan from suddenly changing its rotation direction, thus avoiding the waste of a large amount of energy and preventing severe wear on the slider.

Description

Technical Field

[0001] This utility model relates to the field of stepper motor technology, and more specifically, to a through-type linear stepper motor. Background Technology

[0002] Existing through-type linear stepper motors have an internally threaded rotor shaft that works with a lead screw to convert the motor's rotational motion into linear motion via helical transmission. Existing linear stepper motors generally have a friction-reducing structure between the slider and the slide table to improve their service life. However, existing linear stepper motors generally rely on natural ventilation for heat dissipation, which reduces their efficiency when working for extended periods or in high-temperature environments.

[0003] Regarding the aforementioned problem of heat dissipation difficulties in existing through-type stepper linear motors, extensive searches revealed a through-type stepper linear motor with patent publication number CN222691530U. This motor includes a base plate with a slide fixed to the center of its upper surface and a mounting plate fixed to one end. A stepper motor is bolted to one side of the mounting plate, and a frame is fixed to the other side. A heat dissipation assembly is housed within the frame of the mounting plate. A linear assembly is mounted on the slide. A slider is located on the slide and connected to the linear assembly. This through-type stepper linear motor utilizes a frame on the mounting plate, housing a fan which is connected to the first slot of the stepper motor's output shaft via a first insert. This allows the stepper motor to drive the fan, dissipating heat through air intake slots on the mounting plate. A filter on the connecting plate filters dust, preventing airborne dust from entering the stepper motor. However, this patented solution has the following problems: (1) The stepper motor changes the direction of slider movement by rotating in both directions. When the slider needs to change its direction of movement, the stepper motor will change its rotation direction, and the fan will also change its rotation direction. The sudden change of rotation direction not only requires some energy to overcome the original rotation of the fan, but also aggravates the wear of the meshing part between the fan and the motor. In addition, the fan rotating in the opposite direction cannot dissipate heat from the stepper motor, so the heat dissipation system needs to be improved.

[0004] (2) The connection between the lead screw and the slider is worn, especially when transporting heavy items. After a long period of use, the threaded hole in the center of the slider will be severely worn, making the slider unable to work properly. However, other parts of the slider can still be used. If the slider is discarded directly, it will cause huge waste. Therefore, it is necessary to set up a slider with a replaceable threaded hole.

[0005] This invention can prevent the fan from being wasted a lot of energy due to a sudden change in rotation direction and prevent the slider from suffering severe wear. Summary of the Invention

[0006] The present invention aims to solve the technical problems mentioned in the background art and provide a through-type stepper linear motor to avoid the waste of a lot of energy due to the sudden change of the fan's rotation direction and to avoid serious wear of the slider.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a through-type stepper linear motor, comprising: a base, side plates fixedly connected to the left and right ends of the base, a threaded rod rotatably connected to the center of the top of the side plates, a slider sleeved on the outside of the threaded rod, a stepper motor fixedly connected to the left end of the threaded rod, a fan also installed in the center of the stepper motor and the side plates, a one-way bearing installed in the center of the fan, a threaded rod installed in the center of the one-way bearing, a mounting shell installed on the outside of the fan, a rear baffle detachably connected to the right end of the mounting shell, a ventilation hole through the left end of the mounting shell, and an air filter plate installed in the center of the rear baffle; the one-way bearing comprises: an outer ring, an inner ring, and cylindrical rollers; the outer ring is fixedly connected to the center of the fan, the inner ring is sleeved in the center of the outer ring, the threaded rod is fixedly connected to the center of the inner ring, several right-angled triangular limiting grooves are opened on the outside of the inner ring, and cylindrical rollers are installed in the limiting grooves on the outside of the inner ring.

[0008] A further preferred embodiment: a spring is fixedly installed inside the right-angled edge of the limiting groove of the one-way bearing, and a top block is fixedly connected to the other end of the spring. Stain-blocking plates are fixedly connected to the left and right sides of the one-way bearing.

[0009] A further preferred embodiment: the four corners of the bottom end of the slider are fixedly connected to limit blocks, and the top of the bottom end is provided with a groove that fits with the limit blocks.

[0010] A further preferred embodiment: the bottom end of the limiting block is rotatably connected to a roller.

[0011] A further preferred embodiment: A second wear plate is installed in the center of the slider, and several limiting teeth are opened on the outer side of the second wear plate. A meshing hole that fits with the second wear plate is opened through the center of the slider. The second wear plate is installed in the meshing hole. A second limiting ring is fixedly connected to the right end of the second wear plate. A meshing ring is fixedly connected to the outer side of the meshing ring at the right end of the slider. A second meshing thread is opened on the outer side of the meshing ring. A fixing sleeve is sleeved on the outer side of the second meshing thread. A meshing groove that fits with the second meshing thread is opened on the right end surface of the fixing sleeve. A drive thread that fits with the threaded rod is opened in the center of the second wear plate.

[0012] A further preferred embodiment: the front and rear sides of the slider engagement ring are provided with guide holes, and a guide rod is sleeved inside the guide holes.

[0013] A further preferred embodiment: a first wear plate is sleeved on the inner side of the outer side of the guide hole, a guide rod is sleeved on the inner side of the first wear plate, a first limiting ring is fixedly connected to the right end of the first limiting ring, a first engagement thread is opened on the outer side of the left end of the first limiting ring, and a limiting sleeve engages on the outer side of the first engagement thread on the left end of the first limiting ring.

[0014] A further preferred embodiment: a counterweight ring is fixedly connected to the right end of the one-way bearing.

[0015] A further preferred embodiment: the side plate is detachably and fixedly connected to the left and right ends of the base.

[0016] A further preferred embodiment: the top of the side plate is rotatably connected to a threaded rod via a bearing. Beneficial effects

[0017] 1. By incorporating a one-way bearing, the system avoids wasting a large amount of energy due to sudden changes in the fan's rotation direction. When the inner ring of the bearing rotates in the forward direction, the cylindrical rollers will be stuck on the inclined side of the limiting groove of the inner ring, which will drive the outer ring of the bearing to rotate. When the inner ring of the bearing rotates in the reverse direction, the cylindrical rollers will move into the right-angle side of the limiting groove, preventing the inner ring of the bearing from driving the outer ring of the bearing to rotate, thus achieving the effect of one-way transmission. 2. By setting a first wear plate and a second wear plate, the effect of avoiding severe wear on the slider is achieved. The first wear plate is sleeved on the outside of the guide rod, and then the limiting sleeve is engaged with the first wear plate. The first wear plate is installed in the guide hole by the first limiting ring and the limiting sleeve, so that the first wear plate rubs against the guide rod, avoiding the guide rod from wearing the slider. The second wear plate is installed in the engagement hole, and then the fixing sleeve is engaged with the engagement ring, so that the second wear plate is limited in place by the second limiting ring. A threaded rod is sleeved inside the second wear plate, so that the second wear plate is in direct contact with the threaded rod, avoiding the threaded rod from wearing the slider. 3. In summary, this type of through-type stepper linear motor, by incorporating a one-way bearing, a first wear plate, and a second wear plate, can prevent the fan from being suddenly changed in rotation direction, thus avoiding the waste of a large amount of energy and preventing severe wear on the slider. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the slider structure of this utility model.

[0020] Figure 3 This is a schematic diagram of the first wear-resistant tile structure of this utility model.

[0021] Figure 4 This is a schematic diagram of the second wear-resistant tile structure of this utility model.

[0022] Figure 5 This is a schematic diagram of the fan structure of this utility model.

[0023] Figure 6 This is a cross-sectional view of the one-way bearing of this utility model.

[0024] Figure 1-6 Components: 1. Base; 2. Side plate; 3. Slider; 4. Guide rod; 5. Threaded rod; 6. Rear baffle; 7. Mounting shell; 8. Stepper motor; 9. Slide groove; 10. Limiting block; 11. Roller; 12. Guide hole; 13. Engaging ring; 14. Engaging hole; 15. First wear plate; 16. First limiting ring; 17. Limiting sleeve; 18. Second wear plate; 19. Second limiting ring; 20. Fixing sleeve; 201. Engaging groove; 21. Fan; 22. Counterweight ring; 23. One-way bearing; 231. Bearing outer ring; 232. Bearing inner ring; 233. Spring; 234. Top block; 235. Cylindrical roller; 236. Stain baffle. Detailed Implementation

[0025] The following will refer to the appendix in the embodiments of this utility model. Figures 1-6 The technical solutions in the embodiments of this utility model will be clearly and completely described.

[0026] Please see Figure 1-6 In this embodiment of the utility model, a through-type stepper linear motor includes: a base 1, side plates 2 fixedly connected to the left and right ends of the base 1, a threaded rod 5 rotatably connected to the center of the top of the side plate 2, a slider 3 sleeved on the outside of the threaded rod 5, a stepper motor 8 fixedly connected to the left end of the threaded rod 5, a fan 21 also installed in the center of the stepper motor 8 and the side plate 2, a one-way bearing 23 installed in the center of the fan 21, the threaded rod 5 installed in the center of the one-way bearing 23, a mounting shell 7 installed on the outside of the fan 21, and a rear... The baffle 6; the mounting shell 7 has a ventilation hole through the left end, and the rear baffle 6 has a filter plate installed in the center; the one-way bearing 23 includes: an outer bearing ring 231, an inner bearing ring 232 and cylindrical rollers 235; the fan 21 is fixedly connected to the center of the outer bearing ring 231, the inner bearing ring 232 is sleeved in the center of the outer bearing ring 231, the inner bearing ring 232 is fixedly connected to the center of the inner bearing ring 232, and several right-angled triangular limiting grooves are opened on the outer side of the inner bearing ring 232, and cylindrical rollers 235 are installed in the limiting grooves on the outer side of the inner bearing ring 232.

[0027] In use, the stepper motor 8 is started, and the stepper motor 8 drives the slider 3 to move left and right through the threaded rod 5. At the same time, when the threaded rod 5 rotates, it drives the inner ring 232 of the bearing to rotate. When the inner ring 232 of the bearing rotates in the forward direction, the cylindrical roller 235 will be stuck on the inclined side of the limiting groove of the inner ring 232 of the bearing. At this time, it can drive the outer ring 231 of the bearing to rotate. When the inner ring 232 of the bearing rotates in the reverse direction, the cylindrical roller 235 will move into the right angle side of the limiting groove, so that the inner ring 232 of the bearing cannot drive the outer ring 231 of the bearing to rotate, thereby achieving the effect of unidirectional transmission and avoiding the situation where the fan 21 is suddenly changed in the direction of rotation, which would waste a lot of energy.

[0028] In this embodiment of the present invention, a spring 233 is fixedly installed inside the right-angle side of the limiting groove of the one-way bearing 23, and a top block 234 is fixedly connected to the other end of the spring 233. A dirt baffle 236 is fixedly connected to the left and right sides of the one-way bearing 23, so as to achieve the effect of resetting the cylindrical roller 235. The spring 233 will push the cylindrical roller 235 to reset through the top block 234, thereby avoiding the situation where the cylindrical roller 235 stays on one side of the right-angle side of the limiting groove and cannot drive the outer ring 231 of the bearing to move. In addition, the dirt baffle 236 not only blocks external dirt, but also limits the inner ring 232 of the bearing inside the one-way bearing 23.

[0029] In this embodiment of the utility model, the four corners of the bottom end of the slider 3 are fixedly connected to the limiting blocks 10, and the top end of the bottom end is provided with a sliding groove 9 that fits with the limiting blocks 10, so that the slider 3 can only move left and right.

[0030] In this embodiment of the utility model, the bottom end of the limiting block 10 is rotatably connected to a roller 11, which reduces the wear between the limiting block 10 and the slide groove 9, and also reduces the resistance when the slider 3 moves.

[0031] In this embodiment of the utility model, a second wear tile 18 is installed in the center of the slider 3. Several limiting teeth are provided on the outer side of the second wear tile 18. A meshing hole 14 that fits with the second wear tile 18 is provided in the center of the slider 3. The second wear tile 18 is installed in the meshing hole 14. A second limiting ring 19 is fixedly connected to the right end of the second wear tile 18. A meshing ring 13 is fixedly connected to the outer side of the meshing ring 13 at the right end of the slider 3. A second meshing thread is provided on the outer side of the meshing ring 13. A fixing sleeve 20 is sleeved on the outer side of the second meshing thread. A meshing groove 201 that fits with the second meshing thread is provided on the right end surface of the fixing sleeve 20. A driving thread that fits with the threaded rod 5 is provided in the center of the second wear tile 18.

[0032] To achieve the effect of preventing the threaded rod 5 from wearing down the slider 3, in use, the second wear tile 18 is installed in the engagement hole 14, and then the fixing sleeve 20 is engaged on the engagement ring 13, thereby limiting the second wear tile 18 to its original position through the second limiting ring 19. The threaded rod 5 is sleeved inside the second wear tile 18, so that the second wear tile 18 and the threaded rod 5 are in direct contact, thus preventing the threaded rod 5 from wearing down the slider 3.

[0033] In this embodiment of the utility model, guide holes 12 are provided through the front and rear sides of the engagement ring 13 of the slider 3, and guide rods 4 are sleeved inside the guide holes 12 to prevent the slider 3 from rotating.

[0034] In this embodiment of the invention, a first wear plate 15 is sleeved on the inner side of the outer side of the guide hole 12, and a guide rod 4 is sleeved on the inner side of the first wear plate 15. A first limiting ring 16 is fixedly connected to the right end of the first limiting ring 16, and a first engagement thread is opened on the outer side of the left end of the first limiting ring 16. A limiting sleeve 17 engages on the outer side of the first engagement thread at the left end of the first limiting ring 16, thereby achieving the effect of preventing the guide rod 4 from wearing the slider 3. In use, the first wear plate 15 is sleeved on the outer side of the guide rod 4, and then the limiting sleeve 17 engages on the first wear plate 15. The first wear plate 15 is installed in the guide hole 12 through the first limiting ring 16 and the limiting sleeve 17, so that the first wear plate 15 rubs against the guide rod 4, thereby preventing the guide rod 4 from wearing the slider 3.

[0035] In this embodiment of the utility model, a counterweight ring 22 is fixedly connected to the right end of the one-way bearing 23 to achieve the effect of storing energy. The counterweight ring 22, which has a large mass, will store a certain amount of energy. When the threaded rod 5 stops driving the one-way bearing 23, the counterweight ring 22 can drive the one-way bearing 23 to rotate for a certain period of time, thereby continuing to drive the fan 21 to rotate for a period of time.

[0036] In this embodiment of the utility model, the side plate 2 is detachably fixedly connected to the left and right ends of the base 1, so as to facilitate the maintenance of the device. After removing the side plate 2, the easily worn first wear tile 15 and second wear tile 18 and other components can be replaced.

[0037] In this embodiment of the invention, the top of the side plate 2 is rotatably connected to a threaded rod 5 via a bearing, thereby reducing wear between the side plate 2 and the threaded rod 5 by using the bearing.

[0038] Working principle: During use, the stepper motor 8 is started. The stepper motor 8 drives the threaded rod 5 to move the slider 3 left and right. At the same time, the rotation of the threaded rod 5 drives the inner ring 232 of the bearing to rotate. When the inner ring 232 rotates in the forward direction, the cylindrical roller 235 will be stuck on the inclined side of the limiting groove of the inner ring 232, which can drive the outer ring 231 of the bearing to rotate. When the inner ring 232 rotates in the reverse direction, the cylindrical roller 235 will move into the right-angle side of the limiting groove, so that the inner ring 232 cannot drive the outer ring 231 of the bearing to rotate, thus achieving the effect of unidirectional transmission and avoiding the waste of a lot of energy caused by the sudden change of the rotation direction of the fan 21. In use, the first wear plate 15 is sleeved on the outside of the guide rod 4, and then the limiting sleeve 17 is engaged with the first wear plate 15. The first wear plate 15 is installed in the guide hole 12 by the first limiting ring 16 and the limiting sleeve 17, so that the first wear plate 15 rubs against the guide rod 4, avoiding the guide rod 4 from wearing the slider 3. The second wear plate 18 is installed in the engagement hole 14, and then the fixing sleeve 20 is engaged with the engagement ring 13, so that the second wear plate 18 is limited in place by the second limiting ring 19. The second wear plate 18 is fitted with a threaded rod 5, so that the second wear plate 18 is in direct contact with the threaded rod 5, avoiding the threaded rod 5 from wearing the slider 3.

Claims

1. A through-type stepper linear motor, comprising: The base (1) is characterized in that: side plates (2) are fixedly connected to the left and right ends of the base (1), a threaded rod (5) is rotatably connected to the center of the top of the side plate (2), a slider (3) is sleeved on the outside of the threaded rod (5), a stepper motor (8) is fixedly connected to the left end of the threaded rod (5), a fan (21) is also installed in the center of the stepper motor (8) and the side plate (2), a one-way bearing (23) is installed in the center of the fan (21), a threaded rod (5) is installed in the center of the one-way bearing (23), a mounting shell (7) is installed on the outside of the fan (21), and a rear baffle (6) is detachably connected to the right end of the mounting shell (7). The mounting housing (7) has a ventilation hole through the left end, and the rear baffle (6) has a filter plate installed in the center; the one-way bearing (23) includes: bearing outer ring (231), bearing inner ring (232) and cylindrical roller (235), the bearing outer ring (231) is fixedly connected to the center of the fan (21), the bearing inner ring (232) is sleeved in the center of the bearing outer ring (231), the bearing inner ring (232) is fixedly connected to the center of the bearing inner ring (232), and several right-angled triangular limiting grooves are opened on the outer side of the bearing inner ring (232), and cylindrical roller (235) is installed in the limiting groove on the outer side of the bearing inner ring (232).

2. A through-type stepper linear motor according to claim 1, characterized in that: A spring (233) is fixedly installed inside the right-angled edge of the limiting groove of the one-way bearing (23), and a top block (234) is fixedly connected to the other end of the spring (233). A dirt baffle (236) is fixedly connected to the left and right sides of the one-way bearing (23).

3. A through-type stepper linear motor according to claim 1, characterized in that: The slider (3) has four fixed corners at the bottom end connected to limit blocks (10), and the top end of the bottom end has a groove (9) that fits with the limit blocks (10).

4. A through-type stepper linear motor according to claim 3, characterized in that: The bottom end of the limiting block (10) is rotatably connected to a roller (11).

5. A through-type stepper linear motor according to claim 1, characterized in that: The slider (3) is equipped with a second wear tile (18) in the center. The second wear tile (18) has several limiting teeth on its outer side. The slider (3) has a through hole (14) that fits with the second wear tile (18). The second wear tile (18) is installed in the hole (14). The right end of the second wear tile (18) is fixedly connected to a second limiting ring (19). The outer side of the meshing ring (13) at the right end of the slider (3) is fixedly connected to a meshing ring (13). The outer side of the meshing ring (13) has a second meshing thread. The outer side of the second meshing thread is fitted with a fixing sleeve (20). The right end surface of the fixing sleeve (20) has a meshing groove (201) that fits with the second meshing thread. The center of the second wear tile (18) has a drive thread that fits with the threaded rod (5).

6. A through-type stepper linear motor according to claim 5, characterized in that: The slider (3) has guide holes (12) through the front and rear sides of the engagement ring (13), and a guide rod (4) is sleeved inside the guide holes (12).

7. A through-type stepper linear motor according to claim 6, characterized in that: The guide hole (12) is fitted with a first wear tile (15) on the inner side of the outer side, and a guide rod (4) is fitted on the inner side of the first wear tile (15). The right end of the first limiting ring (16) is fixedly connected to the first limiting ring (16). The left end of the first limiting ring (16) is provided with a first engagement thread. The first engagement thread on the left end of the first limiting ring (16) engages with a limiting sleeve (17).

8. A through-type stepper linear motor according to claim 1, characterized in that: A counterweight ring (22) is fixedly connected to the right end of the one-way bearing (23).

9. A through-type stepper linear motor according to claim 1, characterized in that: The side plate (2) is detachably fixed to the left and right ends of the base (1).

10. A through-type stepper linear motor according to claim 1, characterized in that: The top of the side plate (2) is rotatably connected to a threaded rod (5) via a bearing.

Images