Improved stepping motor driving assembly

Abstract

The utility model discloses an improved stepping motor driving assembly, which comprises a fixed bracket and a stepping motor, wherein a rotor of the stepping motor is provided with a driving worm; the fixed bracket is fixedly provided with a gear shaft which is vertically arranged, the upper end part of the gear shaft is provided with a large-head limiting end part, the periphery of the gear shaft is rotationally sleeved with a combined gear piece which is positioned between the large-head limiting end part and the fixed bracket, and the combined gear piece comprises an upper cylindrical gear and a lower transmission worm gear which are coaxially arranged; the upper cylindrical gear and a lower transmission worm gear are of an integrated structure, and the lower transmission worm gear is meshed with a driving worm; the periphery of the gear shaft is further sleeved with a compression spring and a wear-resisting gasket located on the lower end side of the compression spring, the lower end of the compression spring abuts against the upper surface of the wear-resisting gasket, the lower surface of the wear-resisting gasket makes contact with the fixing bracket, and the upper end of the compression spring abuts against the lower transmission worm wheel. By means of the structural design, the transmission mechanism has the advantages of being novel in structural design, high in transmission precision and low in transmission noise.

Description

Technical Field

[0001] The utility model relates to the technical field of stepper motor execution drivers, in particular to an improved stepper motor drive component. Background Art

[0002] The patent number is: ZL201821369484.7, and the patent name is: A Chinese utility model patent for a lateral output worm gearbox reduction stepper motor, which is essentially a stepper motor actuator product; specifically, the lateral output worm gearbox reduction stepper motor includes a stepper motor body, a fixed bracket located at the front end side of the stepper motor body, the stepper motor body includes a motor housing, a housing accommodating cavity inside the motor housing is embedded with a stator assembly, the stator assembly includes a winding skeleton fixed to the motor housing, and the winding skeleton is wound with a coil winding; the fixed bracket is equipped with a water-repellent screw along the front and rear directions. An output worm extends horizontally, and the rear end portion of the output worm is provided with an optical axis portion extending backward and arranged coaxially with the output worm, the optical axis portion and the output worm are an integral structure, the optical axis portion passes through the front end housing and extends into the shell accommodating cavity of the motor housing, an annular magnet fixed to the periphery of the optical axis portion is embedded in the shell accommodating cavity, and the winding skeleton is sleeved on the periphery of the annular magnet; a gear shaft is screwed into the threaded hole in the bottom plate of the fixed bracket, and a double gear is sleeved on the periphery of the gear shaft, the double gear includes a cylindrical gear and an output worm wheel located at the lower end side of the cylindrical gear, the cylindrical gear and the output worm wheel are an integral structure, and the output worm wheel is meshed with the output worm.

[0003] For the above-mentioned lateral output worm gearbox reduction stepper motor, during its working process, the stepper motor body drives the output worm to rotate, the rotating output worm drives the output worm wheel to reduce the rotation, and the rotating output worm wheel drives the cylindrical gear to rotate synchronously.

[0004] It should be pointed out that the above-mentioned lateral output worm gearbox reduction stepper motor has the following defects, specifically: the double gear is rotatably mounted on the outer periphery of the gear shaft, and the assembly gap between the linkage gear and the gear shaft, especially the axial gap, will cause the entire double gear to have axial (up and down) movement during rotation, that is, the output worm wheel of the double gear will move up and down relative to the output worm, and this relative up and down movement will reduce the accuracy of the worm gear transmission and increase the transmission noise. Utility Model Content

[0005] The utility model aims to provide an improved stepper motor drive assembly to address the deficiencies of the prior art. The improved stepper motor drive assembly has a novel structural design, high transmission accuracy and low transmission noise.

[0006] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical solutions.

[0007] An improved stepper motor drive assembly includes a fixed bracket and a stepper motor fixedly mounted on the fixed bracket, wherein the rotor of the stepper motor is provided with a drive worm extending outward and arranged horizontally;

[0008] The fixed bracket is fastened with a vertically arranged gear shaft, the upper end of the gear shaft is provided with a large end limit end, the outer periphery of the gear shaft is rotatably sleeved with a combined gear member located between the large end limit end and the fixed bracket, the combined gear member includes a coaxially arranged upper cylindrical gear and a lower transmission worm gear, the upper cylindrical gear and the lower transmission worm gear are an integrated structure, and the lower transmission worm gear is meshed with the driving worm;

[0009] The periphery of the gear shaft is also equipped with a compression spring and a wear-resistant gasket located at the lower end side of the compression spring. The lower end of the compression spring abuts against the upper surface of the wear-resistant gasket, the lower surface of the wear-resistant gasket contacts the fixed bracket, and the upper end of the compression spring abuts against the lower transmission worm gear.

[0010] The lower end of the lower transmission worm wheel is provided with a spring positioning ring groove which is open downward and in the shape of a circular ring. The spring positioning ring groove is arranged at intervals from the shaft hole of the combined gear member. The portion of the lower transmission worm wheel located inside the spring positioning ring groove is a spacing ring portion.

[0011] The upper end of the compression spring extends into the spring positioning ring groove of the lower transmission worm wheel.

[0012] Wherein, a riveting portion is provided at the lower end of the gear shaft, and a riveting hole is opened on the fixing bracket corresponding to the gear shaft;

[0013] The riveted portion of the gear shaft is inserted into the riveted hole of the fixing bracket, and the riveted portion of the gear shaft is riveted to the riveted hole of the fixing bracket by a rivet.

[0014] Wherein, the end of the driving worm is rotatably mounted on the fixing bracket through a bearing.

[0015] Wherein, the fixing bracket is a metal bracket, the shell of the stepping motor is a metal part, and the shell of the stepping motor is welded and installed on the fixing bracket.

[0016] Compared with the prior art, the utility model has the following beneficial effects, specifically: when the combined gear part rotates, the elastic force of the compression spring causes the gear combination to abut against the large end limit end of the gear shaft, and the gear combination and the large end limit end of the gear shaft are kept in contact, so that the gear combination can be effectively prevented from moving up and down relative to the gear shaft due to the assembly gap, thereby preventing the problem of low meshing transmission accuracy between the driving worm and the lower transmission worm wheel caused by the up and down movement, and also preventing the problem of increased transmission noise caused by the up and down movement. Therefore, the improved stepper motor drive assembly of the utility model has the advantages of novel structural design, high transmission accuracy and low transmission noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below with reference to the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention.

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] Figure 2 It is an exploded schematic diagram of the utility model.

[0020] Figure 3 It is a cross-sectional schematic diagram of the utility model.

[0021] Figure 4 It is a structural schematic diagram of the combined gear part of the utility model.

[0022] exist Figures 1 to 4 Included are:

[0023] 1-fixed bracket; 11-riveting hole; 2-stepping motor; 21-housing; 3-driving worm; 4-gear shaft; 41-big head limiting end; 42-riveting part; 5-combined gear part; 51-upper cylindrical gear; 52-lower transmission worm gear; 521-spring positioning ring groove; 522-spacer ring part; 6-compression spring; 7-wear-resistant gasket; 8-bearing. DETAILED DESCRIPTION

[0024] The present invention will be described below in conjunction with specific implementation methods.

[0025] Embodiment 1, as Figures 1 to 3 As shown, an improved stepper motor driving assembly includes a fixed bracket 1, a stepper motor 2 fixedly mounted on the fixed bracket 1, and a rotor of the stepper motor 2 is provided with a driving worm 3 extending outward and arranged horizontally.

[0026] Among them, Figures 1 to 4As shown, the fixed bracket 1 is fastened with a vertically arranged gear shaft 4, the upper end of the gear shaft 4 is provided with a large end limit end 41, the outer peripheral rotation sleeve of the gear shaft 4 is provided with a combined gear member 5 located between the large end limit end 41 and the fixed bracket 1, the combined gear member 5 includes a coaxially arranged upper cylindrical gear 51 and a lower transmission worm gear 52, the upper cylindrical gear 51 and the lower transmission worm gear 52 are an integrated structure, and the lower transmission worm gear 52 is meshed with the driving worm 3.

[0027] Further, such as Figures 1 to 3 As shown, the periphery of the gear shaft 4 is also provided with a compression spring 6 and a wear-resistant gasket 7 located at the lower end side of the compression spring 6, the lower end of the compression spring 6 abuts against the upper surface of the wear-resistant gasket 7, the lower surface of the wear-resistant gasket 7 contacts the fixed bracket 1, and the upper end of the compression spring 6 abuts against the lower transmission worm gear 52.

[0028] When the improved stepper motor drive assembly of the first embodiment of the present invention is working, the stepper motor 2 is activated and the rotor of the stepper motor 2 drives the driving worm 3 to rotate synchronously. The rotating driving worm 3 drives the lower transmission worm gear 52 to rotate. Since the lower transmission worm gear 52 and the upper cylindrical gear 51 are an integrated structure, the upper cylindrical gear 51 rotates synchronously with the lower transmission worm gear 52 at this time.

[0029] It should be pointed out that during the rotation of the combined gear part 5 relative to the gear shaft 4, since the upper and lower ends of the compression spring 6 are elastically abutted against the wear-resistant gasket 7 and the lower transmission worm gear 52 on the corresponding sides, when the lower transmission worm gear 52 rotates, the compression spring 6 and the wear-resistant gasket 7 will also rotate, and the wear-resistant gasket 7 will be in rotational sliding contact with the fixed bracket 1.

[0030] It should be emphasized that, for the improved stepper motor drive assembly of the first embodiment, when the combined gear part 5 rotates, the elastic force of the compression spring 6 causes the gear assembly to abut against the large end limit end 41 of the gear shaft 4, and the gear assembly maintains contact with the large end limit end 41 of the gear shaft 4, thereby effectively avoiding the up and down movement of the gear assembly relative to the gear shaft 4 due to the assembly gap, thereby avoiding the problem of low meshing transmission accuracy between the driving worm 3 and the lower transmission worm wheel 52 due to the up and down movement, and also avoiding the problem of increased transmission noise due to the up and down movement.

[0031] Based on the above, it can be seen that through the above structural design, the improved stepper motor drive assembly of the first embodiment has the advantages of novel structural design, high transmission accuracy and low transmission noise.

[0032] Embodiment 2, as Figure 3 and Figure 4As shown, the difference between the second embodiment and the first embodiment is that a spring positioning ring groove 521 which is open downward and in the shape of a circular ring is provided at the lower end of the lower transmission worm gear 52, the spring positioning ring groove 521 is spaced apart from the axial hole of the combined gear member 5, and the portion of the lower transmission worm gear 52 located inside the spring positioning ring groove 521 is a spacing ring portion 522.

[0033] The upper end of the compression spring 6 extends into the spring positioning ring groove 521 of the lower transmission worm wheel 52 , and the upper end of the compression spring 6 is sleeved on the outer periphery of the spacing ring portion 522 .

[0034] The spring positioning ring groove 521 of the second embodiment is used to position the upper end of the compression spring 6 to improve the convenience and accuracy of the installation of the compression spring 6; the upper end of the compression spring 6 is separated from the gear shaft 4 by the spacing ring portion 522, and the spacing ring portion 522 can effectively separate the compression spring 6 from the gear shaft 4. This structural design can effectively avoid contact between the compression spring 6 and the gear shaft 4, thereby avoiding the problem of mutual jamming between the compression spring 6 and the gear shaft 4 during rotation.

[0035] Embodiment three, as Figures 1 to 3 As shown, the difference between the third embodiment and the first embodiment is that the gear shaft 4 of the third embodiment can be fastened to the fixed bracket 1 by riveting. Specifically: a riveted portion 42 is provided at the lower end of the gear shaft 4, and a riveted hole 11 is opened in the fixed bracket 1 corresponding to the gear shaft 4; the riveted portion 42 of the gear shaft 4 is inserted into the riveted hole 11 of the fixed bracket 1, and the riveted portion 42 of the gear shaft 4 is riveted to the riveted hole 11 of the fixed bracket 1 by rivets.

[0036] Embodiment 4, as Figure 1 and Figure 2 As shown, the difference between the fourth embodiment and the first embodiment is that: the end of the driving worm 3 is rotatably mounted on the fixed bracket 1 through the bearing 8; the end of the driving worm 3 is supported and mounted through the bearing 8 to improve the stability of the driving worm 3 when rotating.

[0037] Embodiment 5, as Figures 1 to 3 As shown, the difference between the fifth embodiment and the first embodiment is that the fixing bracket 1 is a metal bracket, the housing 21 of the stepping motor 2 is a metal part, and the housing 21 of the stepping motor 2 is welded and installed on the fixing bracket 1.

[0038] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. An improved stepper motor drive assembly, comprising a fixed bracket (1), a stepper motor (2) fixedly mounted on the fixed bracket (1), the rotor of the stepper motor (2) being provided with a drive worm (3) extending outward and arranged horizontally; A vertically arranged gear shaft (4) is fixedly mounted on the fixed bracket (1); a large end limit end (41) is provided at the upper end of the gear shaft (4); a combined gear member (5) is rotatably sleeved on the outer periphery of the gear shaft (4) and is located between the large end limit end (41) and the fixed bracket (1); the combined gear member (5) comprises a coaxially arranged upper cylindrical gear (51) and a lower transmission worm gear (52); the upper cylindrical gear (51) and the lower transmission worm gear (52) are an integral structure; and the lower transmission worm gear (52) is meshed with the driving worm (3); Features: A compression spring (6) and a wear-resistant gasket (7) located at the lower end side of the compression spring (6) are also mounted on the periphery of the gear shaft (4); the lower end of the compression spring (6) abuts against the upper surface of the wear-resistant gasket (7); the lower surface of the wear-resistant gasket (7) contacts the fixed bracket (1); and the upper end of the compression spring (6) abuts against the lower transmission worm gear (52).

2. The improved stepper motor drive assembly according to claim 1, characterized in that: A spring positioning ring groove (521) opening downward and in the shape of a circular ring is formed at the lower end of the lower transmission worm wheel (52); the spring positioning ring groove (521) and the shaft hole of the combined gear member (5) are arranged at intervals; and a portion of the lower transmission worm wheel (52) located inside the spring positioning ring groove (521) is a spacing ring portion (522); The upper end of the compression spring (6) extends into the spring positioning ring groove (521) of the lower transmission worm wheel (52).

3. The improved stepper motor drive assembly according to claim 1, characterized in that: The lower end of the gear shaft (4) is provided with a riveting portion (42), and the fixing bracket (1) is provided with a riveting hole (11) corresponding to the gear shaft (4); The riveted portion (42) of the gear shaft (4) is inserted into the riveted hole (11) of the fixed bracket (1), and the riveted portion (42) of the gear shaft (4) is riveted into the riveted hole (11) of the fixed bracket (1) by means of rivets.

4. The improved stepper motor drive assembly according to claim 1, characterized in that: The end of the driving worm (3) is rotatably mounted on the fixed bracket (1) via a bearing (8).

5. The improved stepper motor drive assembly according to claim 1, characterized in that: The fixed bracket (1) is a metal bracket, the housing (21) of the stepper motor (2) is a metal part, and the housing (21) of the stepper motor (2) is welded and mounted on the fixed bracket (1).

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