Stepping motor hand adjustment mechanism

Abstract

The utility model discloses a hand -operated mechanism of step motor comprises the inner sleeve and the top rod of mutual cooperation, and the utility model discloses a hand -operated mechanism of step motor is through setting the short groove, long groove and first stop convex point from top to bottom along the thread direction on the outer thread top, sets up the short tooth and long tooth respectively with short groove and long groove cooperation on the inner wall of top rod lower extreme, and the inclination direction of short tooth and long tooth is same with the spiral direction of outer thread, and long tooth and short tooth are forced to push into the outer thread below first stop convex point after long tooth and short tooth with long groove and short groove cooperation, and the inclination direction of long tooth and short tooth is same with the spiral direction of outer thread and long tooth is more lower extreme relative to short tooth, thereby can prevent short tooth from entering the outer thread first when long tooth and short tooth are rotated into the outer thread top, and only when long groove and short groove are all with long tooth and short tooth cooperation respectively, can long tooth and short tooth be forced to push into the outer thread below first stop convex point, can effectively avoid the problem that the outer thread of inner sleeve and long tooth and short tooth of top rod are reversed.

Description

Technical Field

[0001] This utility model relates to a stepper motor manual adjustment mechanism. Background Technology

[0002] The manual stepper motor of the automotive headlight dimming actuator is designed to change the position of the reflector inside the headlight. The stepper motor is located at the bottom of the interior, and a transmission component is connected to the front end of the stepper motor. The transmission component includes a push rod and an inner sleeve. The push rod is hollow inside and has teeth that engage with the threads on the outside of the inner sleeve. The bottom of the inner sleeve is connected to the drive shaft of the stepper motor. A groove is provided on the outer wall of the push rod, and an outer sleeve is fitted into the groove. By driving the outer sleeve to rotate with an external tool, the threads of the push rod and the inner sleeve move relative to each other, causing the push rod to move axially.

[0003] Currently, during assembly, the push rod and inner sleeve of the drive component are directly pushed into the threaded groove on the inner wall of the inner wall by squeezing through the groove at the top of the inner sleeve thread. This assembly method is prone to being installed backwards because there is no anti-reverse mechanism. If installed backwards, the teeth cannot properly engage with the thread to rotate and cannot be pulled out, which easily leads to the waste of raw materials. Utility Model Content

[0004] This utility model provides a manual adjustment mechanism for a stepper motor.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] A stepper motor manual adjustment mechanism includes a motor, a transmission component connected to the top of the motor, and the transmission component including an inner sleeve and a push rod that cooperate with each other. The bottom end of the inner sleeve is connected to the drive shaft of the motor. The outer wall of the inner sleeve is provided with an external thread. The top of the external thread is provided with a short groove, a long groove and a first stop protrusion from top to bottom along the thread direction. The first stop protrusion is arranged adjacent to the long groove. The push rod is sleeved on the outer wall of the inner sleeve. The lower end of the push rod has a hollow structure. The inner wall of the lower end of the push rod is provided with long teeth and short teeth that cooperate with the external thread. The inclination direction of the short teeth and long teeth is the same as the helical direction of the external thread. The long teeth are located at the lower end opposite to the short teeth.

[0007] Preferably, the short teeth are fitted with the short grooves, and the long teeth are fitted with the long grooves.

[0008] Preferably, the external thread is a right-hand helix.

[0009] Preferably, the short groove and the long groove are arranged opposite to each other on the outer wall of the inner sleeve; the short tooth and the long tooth are arranged opposite to each other on the inner wall of the lower end of the push rod.

[0010] Preferably, the short teeth and the short grooves have the same length, and the long teeth and the long grooves have the same length.

[0011] Preferably, the top end of the top rod is provided with a ball head, which cooperates with the reflector inside the headlight.

[0012] Preferably, the top ends of the long groove and the short groove are provided with downward slopes.

[0013] Preferably, the long groove and the short groove are raised relative to the outer wall of the inner sleeve.

[0014] Preferably, a second stop protrusion is provided at the end of the external thread near the drive shaft.

[0015] Preferably, a sliding groove is axially provided on the outer wall of the top rod, and an outer sleeve is fitted on the sliding groove. The outer sleeve is rotatably connected to the motor, and circular teeth are arranged on the outer wall of the outer sleeve.

[0016] Compared with the prior art, the stepper motor manual adjustment mechanism of this utility model has a short groove, a long groove, and a first stop protrusion set on the top of the external thread along the thread direction from top to bottom. Short teeth and long teeth are set on the inner wall of the lower end of the push rod, which respectively cooperate with the short groove and the long groove. The inclination direction of the short teeth and the long teeth is the same as the helical direction of the external thread. After the long teeth and the short teeth cooperate with the long groove and the short groove, they are forced into the external thread below the first stop protrusion. Since the inclination direction of the long teeth and the short teeth is the same as the helical direction of the external thread and the long teeth are lower than the short teeth, it can prevent the short teeth from entering the external thread first when the long teeth and the short teeth are initially turned into the top of the external thread. Only when the long groove and the short groove cooperate with the long teeth and the short teeth respectively can the long teeth and the short teeth be forced into the external thread below the first stop protrusion. This can effectively avoid the problem of reverse installation between the external thread of the inner sleeve and the long teeth and the short teeth of the push rod, thereby reducing material loss and saving costs. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the stepper motor manual adjustment mechanism of this utility model.

[0018] Figure 2 This is a partial structural schematic diagram of the stepper motor manual adjustment mechanism of this utility model.

[0019] Figure 3 This is a first structural view of the inner sleeve of the stepper motor manual adjustment mechanism of this utility model.

[0020] Figure 4 This is a second structural view of the inner sleeve of the stepper motor manual adjustment mechanism of this utility model.

[0021] Figure 5 This is a first structural view of the push rod of the stepper motor manual adjustment mechanism of this utility model.

[0022] Figure 6This is a second structural view of the push rod of the stepper motor manual adjustment mechanism of this utility model. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0024] like Figures 1 to 6 As shown, the stepper motor manual adjustment mechanism includes a motor 100. A transmission component is connected to the top of the motor 100. The motor 100 can drive the transmission component to move axially. The transmission component includes an inner sleeve 1 and a push rod 2 that cooperate with each other. The bottom end of the inner sleeve 1 is connected to the drive shaft of the motor 100. An external thread 11 is provided on the outer wall of the inner sleeve 1. The external thread 11 is a right-hand helix. The top end of the external thread 11 is provided with a short groove 111, a long groove 112 and a first stop protrusion 113 from top to bottom along the thread direction. The short groove 111 and the long groove 112 are arranged opposite to each other on the outer wall of the inner sleeve 1. The first stop protrusion 113 is arranged adjacent to the long groove 112. A second stop protrusion 114 is provided at the end of the external thread 11 near the drive shaft.

[0025] The push rod 2 is sleeved on the outer wall of the inner sleeve 1. The top of the push rod 2 is provided with a ball head 21, which cooperates with the reflector in the headlight. The lower end of the push rod 2 has a hollow structure. The inner wall of the lower end of the push rod 2 is provided with short teeth 22 and long teeth 23 that cooperate with the external thread 11. When not fully assembled, the short teeth 22 also cooperate with the short groove 111, and the long teeth 23 also cooperate with the long groove 112. The short teeth 22 and long teeth 23 are arranged opposite to each other on the inner wall of the lower end of the push rod 2. The short teeth 22 and the short groove 111 have the same length, and the long teeth 23 and the long groove 112 have the same length. The inclination direction of the short teeth 22 and the long teeth 23 is the same as the helical direction of the external thread 1. The long teeth 23 are located at the lower end opposite to the short teeth 22.

[0026] When the inner sleeve 1 is assembled with the push rod 2, since the inclination direction of the long tooth 23 and the short tooth 22 is consistent with the helical direction of the external thread 11, and since the long tooth 23 is located below the short tooth 22, the long tooth 23 is first rotated into the top of the external thread 11. The long tooth 23 first passes through the short groove 111 and continues to rotate. The long tooth 23 abuts against the first stop protrusion 113. At this time, the long tooth 23 engages with the long groove 112, and the short tooth 22 engages with the short groove 111. Then it continues downwards. The push rod 2 is forced to move the long teeth 23 and short teeth 22 past the long groove 112 and short groove 111 and into the external thread 11 below the first stop protrusion 113. After assembly, the long teeth 23 and short teeth 22 engage with the external thread 11. Thus, when the motor drives the inner sleeve 1 to rotate, the push rod 2 rotates on the external thread 11 through the long teeth 23 and short teeth 22 and undergoes axial displacement relative to the inner sleeve 1, thereby changing the position of the reflector and changing the illumination angle of the headlight.

[0027] The top ends of the long groove 112 and the short groove 111 are provided with downward slopes, thereby forcing the long tooth 23 and the short tooth 22 into the lower external thread 11. After the long tooth 23 and the short tooth 22 are pushed into the lower external thread 11, since the long groove 112 and the short groove 111 are in a convex state relative to the outer wall of the inner sleeve 1, the long tooth 23 and the short tooth 22 can no longer be pulled out. The second stop protrusion 114 restricts the lowest point of the displacement of the push rod 2, and the first stop protrusion 113 restricts the highest point of the displacement of the push rod 2.

[0028] The outer wall of the push rod 2 is provided with an axial groove 24, and an outer sleeve 3 is fitted on the groove 24. The outer sleeve 3 is rotatably connected to the motor 100, and the outer wall of the outer sleeve 3 is provided with downward circular teeth 31. The outer sleeve 3 can be rotated by using a tool in conjunction with the circular teeth 31, thereby causing the push rod 2 to move axially relative to the outer sleeve 3.

[0029] This utility model's stepper motor manual adjustment mechanism features a short groove 111, a long groove 112, and a first stop protrusion 113 arranged from top to bottom along the thread direction on the top of the external thread 11. Short teeth 22 and long teeth 23, respectively cooperating with the short groove 111 and the long groove 112, are arranged on the inner wall of the lower end of the push rod 2. The inclination direction of the short teeth 22 and the long teeth 23 is the same as the helical direction of the external thread 1. After the long teeth 23 and the short teeth 22 engage with the long groove 112 and the short groove 111, they force the long teeth 23 and the short teeth 22 into the external thread 11 below the first stop protrusion 113. Due to the long teeth 23 and the short teeth 22... The inclined direction is the same as the helical direction of the external thread, and the long tooth 23 is lower than the short tooth 22. Therefore, when the long tooth 23 and the short tooth 22 are initially turned into the top of the external thread 11, it can prevent the short tooth 22 from entering the external thread 11 first. Only when the long groove 112 and the short groove 111 are engaged with the long tooth 23 and the short tooth 22 respectively can the long tooth 23 and the short tooth 22 be forced into the external thread 11 below the first stop protrusion 113. This can effectively avoid the problem of reverse installation between the external thread 11 of the inner sleeve 1 and the long tooth 23 and the short tooth 22 of the push rod 2, thereby reducing material loss and saving costs.

[0030] Finally, it should be noted that the above embodiments only illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A stepper motor manual adjustment mechanism, comprising a motor (100), wherein a transmission component is connected to the top of the motor (100), the transmission component comprising a cooperating inner sleeve (1) and a push rod (2), the bottom end of the inner sleeve (1) being connected to the drive shaft of the motor, and an external thread (11) being provided on the outer wall of the inner sleeve (1), characterized in that, The top of the external thread (11) is provided with a short groove (111), a long groove (112) and a first stop protrusion (113) from top to bottom along the thread direction. The first stop protrusion (113) is arranged adjacent to the long groove (112). A push rod (2) is sleeved on the outer wall of the inner sleeve (1). The lower end of the push rod (2) is hollow. The inner wall of the lower end of the push rod (2) is provided with a long tooth (23) and a short tooth (22) that cooperate with the external thread (11). The inclination direction of the short tooth (22) and the long tooth (23) is the same as the helical direction of the external thread (11). The long tooth (23) is located at the lower end of the short tooth (22) in the opposite direction.

2. The stepper motor manual adjustment mechanism according to claim 1, characterized in that, The short tooth (22) is engaged with the short groove (111), and the long tooth (23) is engaged with the long groove (112).

3. The stepper motor manual adjustment mechanism according to claim 1, characterized in that, The external thread (11) is a right-hand helix.

4. The stepper motor manual adjustment mechanism according to claim 1, characterized in that, The short groove (111) and the long groove (112) are arranged opposite to each other on the outer wall of the inner sleeve (1); the short tooth (22) and the long tooth (23) are arranged opposite to each other on the inner wall of the lower end of the top rod (2).

5. The stepper motor manual adjustment mechanism according to claim 1 or 4, characterized in that, The short tooth (22) has the same length as the short groove (111), and the long tooth (23) has the same length as the long groove (112).

6. The stepper motor manual adjustment mechanism according to claim 1 or 4, characterized in that, The top of the top rod (2) is provided with a ball head (21), which cooperates with the reflector in the headlight.

7. The stepper motor manual adjustment mechanism according to claim 1 or 4, characterized in that, The top of the long groove (112) and the short groove (111) are provided with downward slopes.

8. The stepper motor manual adjustment mechanism according to claim 1 or 4, characterized in that, The long groove (112) and the short groove (111) are raised relative to the outer wall of the inner sleeve (1).

9. The stepper motor manual adjustment mechanism according to claim 1, characterized in that, The external thread (11) is provided with a second stop protrusion (114) near the drive shaft end.

10. The stepper motor manual adjustment mechanism according to claim 1, characterized in that, The top rod (2) has an axially arranged groove (24) on its outer wall. An outer sleeve (3) is fitted on the groove (24). The outer sleeve (3) is rotatably connected to the motor (100), and circular teeth (31) are arranged on the outer wall of the outer sleeve (3).

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