Alignment structure for assembling gearbox and motor

Abstract

The utility model provides an alignment structure used during assembly of a gearbox and a motor, the alignment structure comprises the motor, the gearbox and a connecting sleeve, and the motor is provided with an output end; the gearbox is provided with a connecting cavity; the connecting sleeve is provided with an assembling cavity; the connecting sleeve sleeves the output end of the motor in a threaded manner and is assembled in the connecting cavity; and the connecting sleeve extends towards the outer part of the connecting cavity so as to extend out of the connecting cavity. According to the invention, the outgoing direction of the motor tail line can be effectively aligned with the positioning position on the gearbox, and the assembly is convenient and fast.

Description

Technical Field

[0001] This utility model relates to the field of transmission mechanism technology, and in particular to an alignment structure between a gearbox and its motor tail wire. Background Technology

[0002] Currently, small, high-speed gearboxes are finding increasingly widespread applications, such as in robotics and medical devices. Combining a gearbox with a micro motor can create a prime mover for various space-constrained applications.

[0003] In related technologies, the gearbox has a threaded hole and the output end of the motor has an external thread. During the threaded connection between the gearbox and the motor, it is difficult to ensure that all thread structures are uniform during the thread processing. Therefore, when the gearbox and the motor are assembled, the direction of the motor's output wire is random, and the wiring harness is not easy to manage. Moreover, the material of the motor tail wire is relatively hard. If it is bent excessively, it is very easy to cause the tail wire to break, which will cause the motor to lose power and the gearbox to stop running. Utility Model Content

[0004] This invention addresses the shortcomings of existing technologies by providing a structure that aligns the tail wires of the gearbox and the matching motor, thereby unifying the outgoing direction of the tail wires.

[0005] This utility model provides an alignment structure for assembling a gearbox and a motor, comprising:

[0006] The motor has an output terminal;

[0007] The gearbox is equipped with a connecting cavity;

[0008] A connecting sleeve having an assembly cavity; the connecting sleeve is threaded onto the output end of the motor and assembled within the connecting cavity; wherein the connecting sleeve extends outward toward the connecting cavity to protrude beyond the connecting cavity.

[0009] Furthermore, the axial dimension of the portion of the connecting sleeve extending outside the connecting cavity ranges from (0 to 0.5 mm).

[0010] Furthermore, the connecting sleeve is interference-fitted with the cavity wall of the connecting cavity.

[0011] Furthermore, the connecting sleeve extends outward toward the connecting cavity to extend beyond the connecting cavity.

[0012] Furthermore, the connecting sleeve has a first positioning cavity and a second positioning cavity, the first positioning cavity and the second positioning cavity communicating to form an assembly cavity for accommodating the output end of the motor; and the second positioning cavity is disposed near the bottom wall of the connecting cavity;

[0013] The aperture of the second positioning cavity is smaller than that of the first positioning cavity.

[0014] Furthermore, the connection between the cavity wall of the first positioning cavity and the cavity wall of the second positioning cavity is a smooth transition.

[0015] Furthermore, it also includes a friction plate, which is sandwiched between the bottom wall of the connecting cavity and the connecting sleeve.

[0016] Furthermore, the gearbox includes:

[0017] A gear ring having the connecting cavity; the gear ring further having a toothed cavity communicating with the connecting cavity; the toothed cavity being located on the side of the connecting cavity away from the motor; the radial dimension of the toothed cavity being smaller than the radial dimension of the connecting cavity; the cavity wall of the toothed cavity having teeth;

[0018] A transmission mechanism that meshes with the teeth and is connected to the output end of the motor; the transmission mechanism has an output shaft that extends from the side away from the motor to outside the tooth cavity.

[0019] Furthermore, the transmission mechanism includes:

[0020] The first sun gear is located in the tooth cavity and passes through the friction plate. The first sun gear is connected to the output end of the motor.

[0021] A plurality of first planetary gears are located in the tooth cavity and mesh at intervals with the outer periphery of the first sun gear; and each first planetary gear meshes with the tooth portion;

[0022] A first planetary carrier is located on the side of the first sun gear away from the motor; each of the first planetary gears is connected to the first planetary carrier;

[0023] An output component is located in the gear cavity; the output component is connected to the first planetary carrier, and the output component has the output shaft.

[0024] Furthermore, the output component includes:

[0025] The second sun gear is connected to the first planet carrier;

[0026] Multiple second planetary gears are spaced apart and mesh with the outer periphery of the second sun gear; and each second planetary gear meshes with the teeth.

[0027] The second planetary carrier is located on the side of the second sun gear opposite to the first sun gear; each of the second planetary gears is connected to the second planetary carrier; the output shaft protrudes from the side of the second planetary carrier opposite to the second sun gear.

[0028] Furthermore, it also includes an end cap and a bearing, wherein the end cap is fitted onto the output shaft and connected to the gear ring; the bearing is located between the end cap and the output shaft.

[0029] This utility model has the following beneficial effects:

[0030] In the technical solution of this application, by setting a connecting sleeve, the motor and gearbox are not directly assembled during assembly. The connecting sleeve is located after the connecting cavity of the gearbox, and then the output end of the motor is threadedly connected to the connecting sleeve. Furthermore, since a portion of the connecting sleeve extends outside the connecting cavity of the gearbox, during the assembly of the motor, the motor first abuts against the protruding end of the connecting sleeve during the screwing process, and does not abut against the gearbox. This avoids the gearbox restricting the motor and causing inconsistent direction of the motor's tail wires. Through the design of the connecting sleeve, this application ensures that the direction of the motor's tail wires is aligned and unified during assembly. Attached Figure Description

[0031] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is a cross-sectional view of an alignment structure used in assembling a gearbox and a motor according to an embodiment of the present invention;

[0033] Figure 2 for Figure 1 Schematic diagram of the connection structure between the intermediate connecting sleeve and the motor;

[0034] Figure 3 for Figure 1 Schematic diagram of the intermediate gearbox;

[0035] Figure 4 for Figure 1 A schematic diagram showing the position of the connecting sleeve when it is not pressed into the gearbox.

[0036] Figure 5 for Figure 1 A schematic diagram of the assembly position of the connecting sleeve and the gearbox.

[0037] The attached diagram is labeled as follows:

[0038] Motor 1, Output terminal 11

[0039] Gearbox 2, connecting cavity 2a, gear ring 21, gear cavity 21a, transmission mechanism 22, first sun gear 221, first planetary gear 222, first planetary carrier 223, second sun gear 224, second planetary gear 225, second planetary carrier 226, output shaft 227, end cover 23, bearing 24, bushing 25, pin 26

[0040] Connecting sleeve 3, assembly cavity 3a, first positioning cavity 3b, second positioning cavity 3c.

[0041] Friction plate 4. Detailed Implementation

[0042] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0043] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0045] like Figure 1 As shown, an alignment structure for assembling a gearbox 2 and a motor 1 includes a motor 1, a gearbox 2, and a connecting sleeve 3. The motor 1 has an output end 11 and a tail wire. The gearbox 2 is provided with a connecting cavity 2a. The connecting sleeve 3 has an assembly cavity 3a. The connecting sleeve 3 is threaded onto the output end 11 of the motor 1 and assembled in the connecting cavity 2a. The connecting sleeve 3 extends outward toward the connecting cavity 2a to extend beyond the connecting cavity 2a.

[0046] By using a connecting sleeve, the motor and gearbox are not directly assembled during assembly. The connecting sleeve is positioned after the gearbox's connecting cavity, and then the motor's output end is threadedly connected to the connecting sleeve. Since a portion of the connecting sleeve extends beyond the gearbox's connecting cavity, during motor assembly, the motor first abuts against the protruding end of the connecting sleeve during the screwing process, rather than against the gearbox. This avoids the gearbox restricting the motor and causing inconsistent motor tail wire direction. This application, through the design of the connecting sleeve, ensures that the motor tail wire direction is aligned and unified during assembly. In other words, by using the connecting sleeve, the relative positions of the motor and gearbox can be pre-aligned upon completion of assembly.

[0047] Specifically, the alignment method in this embodiment is as follows: Before assembling the gearbox 2 and the motor 1, the connecting sleeve 3 can be connected to the output end 11 of the motor 1. Then, the gearbox 2 is brought close to the connecting sleeve 3, but not connected to it. At this time, the relative positions of the gearbox 2 and the motor 1 can be flexibly adjusted so that the tail wire output direction of the motor 1 is aligned with the positioning position on the gearbox 2. At this time, a first preset mark and a second preset mark can be set on the connecting sleeve 3 and the gearbox 2 respectively. Then, the connecting sleeve 3 is removed from the output end 11 of the motor 1, and then the connecting sleeve 3 is inserted into the connecting cavity 2a of the connecting sleeve 3, so that the first preset mark and the second preset mark correspond. Finally, the output end 11 of the motor 1 is connected to the connecting sleeve 3. When the motor 1 and the connecting sleeve 3 are assembled, the tail wire output direction of the motor 1 is aligned with the positioning position on the gearbox 2. If the connecting sleeve 3 does not extend beyond the connecting cavity 2a, the motor 1 may be interfered with by the gearbox 2 before it is screwed into the preset alignment and cannot be screwed into place. This invention can effectively align the direction of the tail wire exit of motor 1 with the positioning position on gearbox 2, making assembly convenient and quick. It solves the problems of random tail wire exit direction and difficult wire harness management in the application environment. It is also easy to process, reliable in connection and simple in structure.

[0048] In this embodiment, the connecting sleeve 3 is made of copper.

[0049] It should be noted that the first and second preset marks can be marked by drawing lines or other means. After the connecting sleeve 3 is inserted into the connecting cavity 2a, the first and second preset marks can be removed.

[0050] For example, for ease of marking, this positioning location can be the threaded hole on the top of gearbox 2.

[0051] In this invention, the tail wire of motor 1 is positioned at the end furthest from the connecting sleeve 3. The connecting sleeve 3 is used to position the direction of the tail wire exiting from motor 1. When using this invention, as... Figure 2 As shown, first screw the connecting sleeve 3 to the motor 1, then align the direction of the tail wire of the motor 1 with the threaded hole on the top of the gearbox 2. Mark the positions where the connecting sleeve 3 and the gearbox 2 are aligned (first preset mark and second preset mark), and then unscrew the connecting sleeve 3 from the motor 1. Figure 4 As shown, the connecting sleeve 3 is then pressed into the connecting cavity 2a from the corresponding position marked on the gearbox 2. Finally, the gearbox 2 is screwed to the motor 1. At this time, the direction of the tail wire of the motor 1 is aligned with the threaded hole on the top of the gearbox 2.

[0052] In the technical solution of this application embodiment, the connecting sleeve 3 is interference-fitted with the cavity wall of the connecting cavity 2a. This improves the connection stability between the connecting sleeve 3 and the cavity wall of the connecting cavity 2a, prevents the connecting sleeve 3 from deflecting within the connecting cavity 2a when it is assembled with the output end 11 of the motor 1, and ensures that the first preset mark and the second preset mark always correspond, so as to ensure that the output direction of the motor 1 tail wire is aligned with the positioning position of the gearbox 2 after the motor 1 is assembled.

[0053] In the technical solution of this application embodiment, the axial dimension of the connecting sleeve 3 extending beyond the connecting cavity 2a is within the range of (0, 0.5 mm). Within this range, it can be ensured that the tail wire exit direction of the motor is aligned, and it can also avoid the connecting sleeve extending too far, which would affect the assembly stability of the motor and gearbox.

[0054] like Figure 4 As shown in the technical solution of this application embodiment, the connecting sleeve 3 has a first positioning cavity 3b and a second positioning cavity 3c. The first positioning cavity 3b and the second positioning cavity 3c communicate to form an assembly cavity 3a for accommodating the output end 11 of the motor 1. The second positioning cavity 3c is disposed near the bottom wall of the connecting cavity 2a. The aperture of the second positioning cavity 3c is smaller than the aperture of the first positioning cavity 3b. Thus, a stepped structure is formed at the connection between the first positioning cavity 3b and the second positioning cavity 3c, which can play a positioning and limiting role in the assembly of the output end 11 of the motor 1 and the connecting sleeve 3.

[0055] like Figure 4As shown, in the technical solution of this application embodiment, the connection between the cavity wall of the first positioning cavity 3b and the cavity wall of the second positioning cavity 3c is a smooth transition. The external shape of the output end 11 of the motor 1 is adapted to the assembly cavity 3a, that is, the output end 11 of the motor 1 also forms a smoothly transitioning stepped structure. In this way, it is convenient to process the assembly cavity 3a of the connecting sleeve 3 and the output end 11 of the motor 1, and the processing difficulty is reduced.

[0056] like Figure 4 As shown, the technical solution of this application embodiment also includes a friction plate 4, which is sandwiched between the bottom wall of the connecting cavity 2a and the connecting sleeve 3. On the one hand, the friction plate 4 serves as a separator, located between the motor 1 and the first planetary gear 222 described below, which can prevent the movement of the first planetary gear 222 from affecting the components in the connecting cavity 2a; in addition, by replacing the friction plate 4 with different thicknesses, the versatility of the connecting cavity 2a can be achieved, and the connecting cavity 2a can be equipped with connecting sleeves 3 with different assembly cavity 3a sizes or different axial lengths to adapt to different output ends 11 of the motor 1.

[0057] like Figure 4 and Figure 5 As shown, in the technical solution of this application embodiment, the gearbox 2 includes a gear ring 21 and a transmission mechanism 22. The gear ring 21 has a connecting cavity 2a. The gear ring 21 is also provided with a tooth cavity 21a communicating with the connecting cavity 2a. The tooth cavity 21a is located on the side of the connecting cavity 2a away from the motor 1. The radial dimension of the tooth cavity 21a is smaller than the radial dimension of the connecting cavity 2a. The cavity wall of the tooth cavity 21a is provided with teeth. The transmission mechanism 22 meshes with the teeth, and the input end of the transmission mechanism 22 is connected to the output end 11 of the motor 1. The transmission mechanism 22 has an output shaft 227, and the output shaft 227 extends from the side away from the motor 1 to outside the tooth cavity 21a.

[0058] It is understandable that the output end 11 of the motor 1 provides power to the transmission mechanism 22. The meshing of the transmission mechanism 22 with the gear ring 21 plays the role of adjusting the speed and transmitting torque. The required speed is output from the output end 11 of the transmission mechanism 22 through the transmission of the transmission mechanism 22.

[0059] The radial dimension of the tooth cavity 21a is smaller than that of the connecting cavity 2a. A positioning step is formed at the connection between the tooth cavity 21a and the connecting cavity 2a. The friction plate 4 is positioned and fitted onto the positioning step, which serves to position the friction plate 4 during installation.

[0060] like Figure 4 and Figure 5As shown in the technical solution of this application embodiment, the transmission mechanism 22 includes a first sun gear 221, a plurality of first planetary gears 222, a first planetary carrier 223, and an output component. The first sun gear 221 is located in the tooth cavity 21a and passes through the friction plate 4. The first sun gear 221 is connected to the output end 11 of the motor 1. The plurality of first planetary gears 222 are located in the tooth cavity 21a and mesh with the outer periphery of the first sun gear 221 at intervals. Each first planetary gear 222 meshes with the tooth. The first planetary carrier 223 is located on the side of the first sun gear 221 away from the motor 1. Each first planetary gear 222 is connected to the first planetary carrier 223. The output component is located in the tooth cavity 21a and is located on the first planetary carrier 223. The output component is connected to the first planetary carrier 223 and has an output shaft 227.

[0061] like Figure 4 As shown, in the technical solution of this application embodiment, the output component includes a second sun gear 224, a plurality of second planetary gears 225, and a second planetary carrier 226. The second sun gear 224 is connected to the first planetary carrier 223. The plurality of second planetary gears 225 are spaced apart and mesh with the outer periphery of the second sun gear 224. Each second planetary gear 225 meshes with a tooth. The second planetary carrier 226 is located on the side of the second sun gear 224 away from the first sun gear 221. Each second planetary gear 225 is connected to the second planetary carrier 226. An output shaft 227 protrudes from the side of the second planetary carrier 226 away from the second sun gear 224 and extends beyond the tooth cavity 21a.

[0062] It is understood that a two-stage planetary gear reduction structure is formed by the cooperation of the gear ring 21, the first sun gear 221, multiple first planetary gears 222, the first planetary carrier 223, the second sun gear 224, multiple second planetary gears 225, and the second planetary carrier 226, thereby achieving the purpose of speed reduction. The two-stage planetary gear reduction structure of this application has a compact structure, high transmission efficiency, and strong load-bearing capacity.

[0063] The first planetary gear 222 is connected to the first planetary carrier 223 by a pin 26, and the second forming gear is connected to the second planetary carrier 226 by a pin 26.

[0064] In other embodiments, when the output component is directly the output shaft 227, a first-stage planetary gear structure is formed by the cooperation of the first sun gear 221, multiple first planetary gears 222, and the first planet carrier 223. The first sun gear 221 is located at the center, and the first planetary gears 222 rotate around the first sun gear 221 and mesh with the teeth of the gear ring 21. The movement of the first planetary gears 222 achieves the purpose of deceleration.

[0065] In some embodiments, multiple sequentially connected planetary gear structures can be provided between the output component and the first planetary carrier, thus the transmission mechanism is a multi-stage planetary gear reduction structure.

[0066] like Figure 4 and Figure 5 As shown, the technical solution of this application embodiment also includes an end cover 23 and a bearing 24. The end cover 23 is sleeved on the output shaft 227 and connected to the gear ring 21; the bearing 24 is located between the end cover 23 and the output shaft 227.

[0067] Understandably, the end cap 23 is designed to provide a mounting position for the bearing 24, and the bearing 24 provides support for the output shaft 227. In this embodiment, there are two bearings 24, which are spaced apart. In this embodiment, the bearings 24 can be ball bearings.

[0068] like Figure 4 and Figure 5 As shown in the embodiment of this application, the technical solution also includes a bushing 25, which is sleeved on the output shaft 227. One side of the bushing 25 contacts the inner ring of the bearing 24, and the other side is welded to the output shaft 227 by laser. The bushing 25 serves to limit the position of the bearing 24.

[0069] The alignment structure of the gearbox and its motor tail wire proposed in this utility model effectively solves the drawback of the messy direction of the motor tail wire output, improves the significant problem of difficult wire harness management, and also largely avoids the problem of the motor tail wire breaking due to excessive bending, thereby greatly reducing the probability of gearbox motor failure.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An alignment structure for use in assembling a gear box and an electric machine, characterized in that, The motor (1) has an output end (11); the gear box (2) is provided with a connecting cavity (2a); the connecting sleeve (3) is screwed on the output end (11) of the motor (1) and is fitted in the connecting cavity (2a); wherein the connecting sleeve (3) extends towards the outside of the connecting cavity (2a) to extend out of the connecting cavity (2a). The axial dimension of the part of the connecting sleeve (3) extending out of the connecting cavity (2a) ranges from 0 to 0.5 mm. The connecting sleeve (3) is in interference fit with the cavity wall of the connecting cavity (2a). The connecting sleeve (3) has a first positioning cavity (3b) and a second positioning cavity (3c), the first positioning cavity (3b) and the second positioning cavity (3c) are in communication to form a fitting cavity (3a) for accommodating the output end (11) of the motor (1); and the second positioning cavity (3c) is arranged close to the bottom wall of the connecting cavity (2a); 2. An alignment structure for use in assembling a gear box and an electric machine according to claim 1, characterized in that, Wherein, the aperture of the second positioning cavity (3c) is smaller than the aperture of the first positioning cavity (3b).

3. The alignment structure for gear box and motor assembly according to claim 1, wherein, The connection between the cavity wall of the first positioning cavity (3b) and the cavity wall of the second positioning cavity (3c) is smoothly transitioned.

4. The alignment structure for gear box and motor assembly according to claim 1, wherein Further comprising a friction plate (4) clamped between the bottom wall of the connecting cavity (2a) and the connecting sleeve (3). The gear box (2) comprises:

5. An alignment structure for use in assembling a gearbox and motor according to claim 4, characterised in that, The gear ring (21) has the connecting cavity (2a); the gear ring (21) is further provided with a gear cavity (21a) in communication with the connecting cavity (2a); the gear cavity (21a) is located on the side of the connecting cavity (2a) away from the motor (1); the radial dimension of the gear cavity (21a) is smaller than the radial dimension of the connecting cavity (2a); the cavity wall of the gear cavity (21a) is provided with a gear part; 6. The alignment structure for gear box and motor assembly according to claim 1, wherein The transmission mechanism (22) is engaged with the gear part, and the transmission mechanism (22) is connected with the output end (11) of the motor (1); the transmission mechanism (22) has an output shaft, and the output shaft extends out of the gear cavity (21a) from the side away from the motor (1).

7. The alignment structure for gear box and motor assembly as claimed in claim 6 wherein, The transmission mechanism (22) comprises: The first sun gear (221) is located in the gear cavity (21a) and penetrates the friction plate (4), and the first sun gear (221) is connected with the output end (11) of the motor (1); A plurality of first planetary gears (222) are located in the gear cavity (21a) and are spacedly engaged with the outer periphery of the first sun gear (221); and each first planetary gear (222) is engaged with the gear part; 8. An alignment structure for use in assembling a gearbox and an electric machine according to claim 7, characterized in that The first planetary carrier (223) is located on the side of the first sun gear (221) away from the motor (1); each first planetary gear (222) is connected with the first planetary carrier (223); The output assembly is located in the gear cavity (21a); the output assembly is connected with the first planetary carrier (223), and the output assembly has the output shaft. The output assembly comprises: ​ ​ 9. An alignment structure for use in assembling a gear box and motor according to claim 8, wherein ​ A second sun gear (224) is connected with the first planet carrier (223); A plurality of second planet gears (225) are in mesh with the outer periphery of the second sun gear (224) at intervals, and each of the second planet gears (225) is in mesh with the tooth portion; A second planet carrier (226) is located on the side of the second sun gear (224) away from the first sun gear (221), each of the second planet gears (225) is connected with the second planet carrier (226), and the second planet carrier (226) is provided with the output shaft (227) on the side away from the second sun gear (224).

10. An alignment structure for use in assembling a gearbox and motor according to claim 9, wherein, Further comprising an end cover (23) and a bearing (24), the end cover (23) is sleeved on the output shaft (227) and connected with the ring gear (21), and the bearing (24) is arranged between the end cover (23) and the output shaft (227).

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