Assembly tool of transmission mechanism

Abstract

The assembly tool of the transmission mechanism comprises a base and a top seat, the base is provided with a first center counter bore extending in the axial direction and a step groove extending in the radial direction, the first center counter bore is used for containing a planet shaft, the step groove is used for containing a planet gear, and the planet shaft is used for assembling a spacer bush. A gap between the spacer bush and the planetary gear is used for accommodating the roller pin; the top seat can be arranged opposite to the base, the top seat is provided with a second center counter bore extending in the axial direction, the inner diameter of the second center counter bore is the same as that of the first center counter bore, and the second center counter bore is used for containing the planet shaft. Through cooperation of the base and the top base, fixing of the planet shaft and the planet gear is achieved, and it is guaranteed that the planet shaft and the planet gear can be coaxial; and the roller pin mounting gap is fixed, so that the roller pin can be placed in place. And meanwhile, in the overturning process of the tool, the overturning roller pins are prevented from falling apart and falling off.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission mechanism assembly, in particular to an assembly tool for a transmission mechanism. Background Art

[0002] The transmission mechanism of the reducer or gearbox includes planetary shafts, planetary gears, spacers and needle rollers. The assembly steps of the transmission mechanism are: first place the planetary shaft in the planetary gear so that the planetary shaft and the planetary gear are coaxial, then place the spacer on the planetary shaft, then place the first layer of needle rollers in the gap between the spacer and the planetary gear, then turn the whole thing over, and finally place the second layer of needle rollers in the gap between the spacer and the planetary gear.

[0003] However, when the transmission mechanism is assembled, the planetary shaft and the planetary gear are difficult to position, which makes it difficult to put the needle roller in place; at the same time, when the whole is turned over, it is easy to fall apart if you are not careful. Utility Model Content

[0004] Based on the above description, the utility model provides an assembly tool for a transmission mechanism, aiming to solve the problem that the planetary shafts and planetary gears of the existing transmission mechanism are difficult to position and easily fall apart when the whole is turned over.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] An assembly tool for a transmission mechanism, characterized by comprising:

[0007] A base having a first central counterbore extending in the axial direction and a step groove extending in the radial direction, wherein the first central counterbore is used to accommodate a planetary shaft, the step groove is used to place a planetary gear, the planetary shaft is used to assemble a spacer sleeve, and the gap between the spacer sleeve and the planetary gear is used to accommodate a needle roller;

[0008] The top seat can be arranged opposite to the base, and the top seat has a second center countersunk hole extending axially, the inner diameter of the second center countersunk hole is the same as that of the first center countersunk hole, and the second center countersunk hole is used to accommodate the planetary shaft.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, at least one sliding unit is provided in the step groove, and the sliding unit is composed of a plurality of balls arranged at intervals around the axis of the first central countersunk hole.

[0011] Furthermore, one end of the base away from the top seat and / or one end of the top seat away from the base is provided with a plurality of anti-slip protrusions distributed in an array.

[0012] Furthermore, it includes a shift rod, which includes a round rod and a fan-shaped auxiliary plate. The fan-shaped auxiliary plate is arranged at one end of the round rod. The radius of the fan-shaped auxiliary plate is the same as the radius of the positioning protrusion of the planetary gear. The round rod can be inserted and pulled out of the gap between the planetary shaft and the planetary gear. The round rod is used to assist the roller needle to stand.

[0013] Furthermore, an extension plate is provided on the fan-shaped auxiliary plate.

[0014] Furthermore, it includes a plurality of locking assemblies, which are arranged at intervals around the axis of the top seat, and the locking assembly includes a connecting rod, a U-shaped plate and a nut. The connecting rod is rotatably arranged on the top seat, and an external thread is provided at one end of the connecting rod away from the top seat. The U-shaped plate is arranged on the base, and when the nut is threadably engaged with the external thread, the nut and the U-shaped plate are fastened to limit the position of the connecting rod.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0016] (1) The present application achieves the fixation of the planetary shaft and the planetary gear through the cooperation of the base and the top seat, ensuring that the planetary shaft can be coaxial with the planetary gear; and the fixing of the needle roller installation gap ensures that the needle roller can be placed in place. At the same time, the needle roller does not fall apart during the tooling flipping process.

[0017] (2) The present application uses a lever. When the needle roller is tilted, the fan-shaped auxiliary plate can be moved to drive the round rod to align the needle roller, thereby facilitating the subsequent close fitting of the needle roller.

[0018] (3) The present application prevents parts from falling off during the turning process of the tooling by locking the assembly, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 An exploded view of an assembly tool for a transmission mechanism provided in an embodiment of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the base in the embodiment of the utility model;

[0021] Figure 3 This is a schematic diagram of the mechanism of the lever in the embodiment of the utility model;

[0022] Figure 4 This is a structural diagram of step 2 in the embodiment of the utility model;

[0023] Figure 5 This is a schematic diagram of the structure of step three in the embodiment of the utility model;

[0024] Figure 6It is a cross-sectional view of step three in the embodiment of the utility model.

[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0026] 1. Planetary axis;

[0027] 2. Planetary gear;

[0028] 3. Needle rolling;

[0029] 10. base; 11. first center countersunk hole; 12. step groove; 121. ball bearing;

[0030] 20. Top seat; 21. Second center countersunk hole; 22. Anti-slip protrusion;

[0031] 30. lever; 31. round rod; 32. fan-shaped auxiliary plate; 321. extension plate;

[0032] 40. Locking assembly; 41. Connecting rod; 42. U-shaped plate; 43. Nut. DETAILED DESCRIPTION

[0033] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0035] It will be appreciated that spatial relationship terms such as "under," "beneath," "below," "under," "above," "above," etc., may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It will be appreciated that, in addition to the orientations shown in the figures, spatial relationship terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as being "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0036] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0037] See attached Figures 1 to 5 As shown, the utility model provides a technical solution: an assembly tool for a transmission mechanism, comprising a base 10 and a top seat 20, the base 10 having a first center countersunk hole 11 extending along the axial direction and a step groove 12 extending along the radial direction, the first center countersunk hole 11 is used to accommodate a planetary shaft 1, the step groove 12 is used to place a planetary gear 2, the planetary shaft 1 is used to assemble a spacer sleeve (not shown in the figure), and the gap between the spacer sleeve and the planetary gear 2 is used to accommodate a needle roller 3; the top seat 20 can be arranged opposite to the base 10, and the top seat 20 has a second center countersunk hole 21 extending along the axial direction, the second center countersunk hole 21 has the same inner diameter as the first center countersunk hole 11, and the second center countersunk hole 21 is used to accommodate the planetary shaft 1.

[0038] According to this embodiment, the step groove 12 can realize the positioning of the planetary gear 2 and prevent the planetary gear 2 from tilting. Through the cooperation of the base 10 and the top seat 20, when the two layers of needle rollers 3 begin to be assembled, the needle rollers 3 can be ensured to be vertical, thereby facilitating the assembly of the needle rollers 3.

[0039] See attached Figures 1-2 As shown, in some embodiments, at least one sliding unit is provided in the step groove 12 , and the sliding unit is composed of a plurality of balls 121 spaced apart around the axis of the first central counterbore 11 .

[0040] According to this embodiment, when the planetary gear 2 is assembled with or removed from the base 10 , the ball 121 can roll along, which can reduce the friction between the planetary gear 2 and the base 10 , thereby preventing the planetary gear 2 from being worn.

[0041] See attached Figures 1-2 As shown in FIG. 5 , in some embodiments, one end of the base 10 away from the top seat 20 and / or one end of the top seat 20 away from the base 10 is provided with a plurality of anti-slip protrusions 22 distributed in an array.

[0042] Exemplarily, the array distribution may be a rectangular array or a circular array, etc.

[0043] According to this embodiment, when the base 10 or the top seat 20 contacts a plane, the anti-skid protrusions 22 can play an anti-skid role to prevent the base 10 or the top seat 20 from sliding when the ball 121 is assembled.

[0044] See attached Figure 1and 3 As shown in Figure 4, in some embodiments, a lever 30 is included, and the lever 30 includes a round rod 31 and a fan-shaped auxiliary plate 32. The fan-shaped auxiliary plate 32 is arranged at one end of the round rod 31. The radius of the fan-shaped auxiliary plate 32 is the same as the radius of the positioning protrusion of the planetary gear 2. The round rod 31 can be inserted and pulled out of the gap between the planetary shaft 1 and the planetary gear 2, and the round rod 31 is used to assist the needle roller 3 to stand.

[0045] According to this embodiment, at the initial stage of assembling each layer of needle rollers 3, the round rod 31 is inserted into the planetary gear 2, and the sector-shaped auxiliary plate 32 is fitted with the positioning protrusion of the planetary gear 2. The round rod 31 is flat with the base 10 or the top seat 20 under the influence of gravity, and the round rod 31 is perpendicular to the base 10 or the top seat 20. Then the needle roller 3 is placed in the gap between the planetary gear 2 and the planetary shaft 1, and the needle roller 3 fits the round rod 31 and is perpendicular to the base 10 or the top seat 20. Then the needle roller 3 is placed step by step. When the needle roller 3 is tilted, the sector-shaped auxiliary plate 32 can be moved to drive the round rod 31 to align the needle roller 3.

[0046] See attached Figure 1 and 3 As shown in Figures 4 to 5, in some embodiments, an extension plate 321 is provided on the fan-shaped auxiliary plate 32.

[0047] According to this embodiment, the extension plate 321 can lengthen the fan-shaped auxiliary plate 32 , making it easier to apply force to the fan-shaped auxiliary plate 32 .

[0048] See attached Figure 1 and 5 As shown, in some embodiments, a plurality of locking assemblies 40 are included, and the plurality of locking assemblies 40 are spaced apart around the axis of the top seat 20. The locking assembly 40 includes a connecting rod 41, a U-shaped plate 42 and a nut 43. The connecting rod 41 is rotatably disposed on the top seat 20, and an external thread is provided at one end of the connecting rod 41 away from the top seat 20. The U-shaped plate 42 is disposed on the base 10. When the nut 43 is threadably engaged with the external thread, the nut 43 and the U-shaped plate 42 are tightened to limit the position of the connecting rod 41.

[0049] According to this embodiment, after the top seat 20 is placed on the planetary gear 2, the connecting rod 41 is matched with the U-shaped plate 42, and then the nut 43 is threadedly matched with the external thread, so that the nut 43 and the U-shaped plate 42 are in contact to generate resistance to prevent the connecting rod 41 from moving, and the tooling can be regarded as a whole. In the process of turning over the tooling, the parts are prevented from being scattered, thereby improving the work efficiency.

[0050] The specific implementation process of the assembly tool of the transmission mechanism is as follows:

[0051] Step 1: Place the base 10 on a plane, first place the planetary shaft 1 in the first center countersunk hole 11 , then place the planetary gear 2 in the step groove 12 , and finally place the spacer in the gap between the planetary shaft 1 and the planetary gear 2 .

[0052] Step 2: first insert the round rod 31 of the lever 30 into the gap between the spacer and the planetary gear 2, and then place the needle rollers 3 one by one in the gap between the spacer and the planetary gear 2 until the first layer of needle rollers 3 are placed, and then take out the lever 30; when the needle rollers 3 are tilted, the round rod 31 is driven by moving the fan-shaped auxiliary plate 32 to align the needle rollers 3.

[0053] Step three: align the second center countersunk hole 21 of the top seat 20 with the planetary shaft 1, and move the top seat 20 downward to contact the planetary gear 2; then match the connecting rod 41 with the U-shaped plate 42, and with the external thread through the nut 43, so that the tooling can be regarded as a whole; finally, turn the entire tooling over to place the top seat 20 on a plane. At this time, the first layer of needle rollers 3 are in contact with the top seat 20. After removing the base 10, repeat step two to assemble the second layer of ball 121.

[0054] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An assembly tool for a transmission mechanism, characterized in that: include: The base (10) has a first central counterbore (11) extending in the axial direction and a step groove (12) extending in the radial direction, wherein the first central counterbore (11) is used to accommodate a planetary shaft (1), the step groove (12) is used to place a planetary gear (2), the planetary shaft (1) is used to assemble a spacer sleeve, and the gap between the spacer sleeve and the planetary gear (2) is used to accommodate a needle roller (3); The top seat (20) can be arranged opposite to the base (10), and the top seat (20) has a second central countersunk hole (21) extending in the axial direction, and the inner diameter of the second central countersunk hole (21) is the same as that of the first central countersunk hole (11), and the second central countersunk hole (21) is used to accommodate the planetary shaft (1).

2. The assembly tool for a transmission mechanism according to claim 1, characterized in that: At least one sliding unit is arranged in the step groove (12), and the sliding unit is composed of a plurality of balls (121) arranged at intervals around the axis of the first central countersunk hole (11).

3. The assembly tool for a transmission mechanism according to claim 1, characterized in that: An end of the base (10) away from the top seat (20) and / or an end of the top seat (20) away from the base (10) is provided with a plurality of anti-slip protrusions (22) distributed in an array.

4. The assembly tool for a transmission mechanism according to claim 1, characterized in that: The invention comprises a lever (30), wherein the lever (30) comprises a round rod (31) and a fan-shaped auxiliary plate (32), wherein the fan-shaped auxiliary plate (32) is arranged at one end of the round rod (31), wherein the radius of the fan-shaped auxiliary plate (32) is the same as the radius of the positioning protrusion of the planetary gear (2), and the round rod (31) can be inserted and pulled out of the gap between the planetary shaft (1) and the planetary gear (2), and the round rod (31) is used to assist the needle roller (3) to stand.

5. The assembly tool for a transmission mechanism according to claim 4, characterized in that: An extension plate (321) is provided on the fan-shaped auxiliary plate (32).

6. An assembly tool for a transmission mechanism according to any one of claims 1 to 5, characterized in that: The invention comprises a plurality of locking assemblies (40), wherein the plurality of locking assemblies (40) are arranged at intervals around the axis of the top seat (20), and the locking assembly (40) comprises a connecting rod (41), a U-shaped plate (42) and a nut (43). The connecting rod (41) is rotatably arranged on the top seat (20), and an external thread is provided at one end of the connecting rod (41) away from the top seat (20). The U-shaped plate (42) is arranged on the base (10). When the nut (43) is threadably matched with the external thread, the nut (43) and the U-shaped plate (42) are fastened to limit the position of the connecting rod (41).

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