Planetary carrier pin shaft tooling

Abstract

This utility model relates to the technical field of planetary carrier processing equipment, and in particular to a planetary carrier pin tooling. It includes a base and a cover plate, which are clamped to both sides of the planetary carrier. A first positioning element is provided on the base, and a second positioning element and a blanking hole are provided on the cover plate. The second positioning element is located on the outer periphery of the blanking hole and is used to connect with the first positioning element. A support mechanism is provided on the base, located inside the first positioning element, and abuts against the pin during press-fitting. This utility model can simultaneously provide radial limiting for multiple pins, guide the pins throughout the press-fitting process, reduce the problem of pins tilting during press-fitting into the planetary carrier, and can achieve press-fitting of all pins on the planetary carrier in one operation, significantly improving the press-fitting efficiency of pins on the planetary carrier.

Description

Technical Field

[0001] This utility model relates to the technical field of planetary carrier processing equipment, and in particular to a planetary carrier pin tooling. Background Technology

[0002] Planetary reducers are efficient and compact transmission devices. The planetary gear mechanism is a key component of a planetary reducer. Its basic structure includes a planet carrier, planetary gears, and a pin. The pin is fixed to the planet carrier, and the planetary gears are mounted on the pin through bearings. The planetary gear mechanism achieves torque transmission and speed reduction by meshing the planetary gears with the sun gear and ring gear in the reduction mechanism.

[0003] The planetary carrier's pin and the planetary carrier achieve an interference fit through press fitting. During the press fitting process, the planetary carrier is positioned on a tooling, and the pin is riveted into the pin hole of the planetary carrier under the pressure of the press. For example, a planetary gear shaft riveting tooling disclosed in Chinese Patent No. CN 110744282 B has a planetary gear shaft riveting tooling. The planetary carrier is positioned on a planetary carrier placement base, which has riveting holes corresponding to the riveting positions of the planetary gear shaft. A first pressure head is provided on the tooling body below the riveting holes. During press fitting, after the pressure head of the press contacts the planetary gear shaft, it drives the planetary carrier and the planetary carrier placement base to descend together until the lower end of the planetary gear shaft contacts the first pressure head. The upper and lower pressure heads together squeeze the planetary gear shaft, completing the riveting process of one planetary gear shaft.

[0004] During the press-fitting of the planetary carrier pin and the planetary carrier, in order to ensure high-precision transmission, the planetary carrier pin is generally required to be pressed vertically into the pin hole of the planetary carrier without tilting. However, in the existing technology mentioned above, only the riveting hole can provide some support and limit for the pin in the initial stage of press-fitting. However, due to the interference fit between the riveting hole and the pin, the support and limit function of the riveting hole on the pin can only be applied to the lower end of the pin. As a result, the support and limit function of the existing technology on the pin is relatively limited in the initial stage of press-fitting. During the press-fitting process, there is a problem of the pin being pressed in at an angle, which will affect the transmission accuracy of the planetary reducer. Utility Model Content

[0005] To address the limitations of current planetary carrier pin tooling in providing support and limiting for the pins, and the problem of pins being pressed in at an angle during the press-fitting process, this invention aims to provide a new planetary carrier pin tooling that can radially limit the pins during the press-fitting process, ensuring that the pins are pressed vertically into the planetary carrier. Furthermore, it can simultaneously press-fit multiple pins, thereby improving the processing efficiency of the planetary carrier.

[0006] To achieve the objectives of this utility model, a planetary carrier pin tooling is provided, which adopts the following technical solution: A planetary carrier pin tooling includes a base and a cover plate. The base and the cover plate are used to clamp the two sides of the planetary carrier. The base is provided with a first positioning element, and the cover plate is provided with a second positioning element and a discharge hole. The second positioning element is located on the outer periphery of the discharge hole and is used to connect with the first positioning element. A support mechanism is provided on the base. The support mechanism is located inside the first positioning member. During press-fitting, the support mechanism abuts against the pin.

[0007] Through the above technical solution, the planetary carrier to be press-fitted with pins is positioned on the base by the cooperation of its pin holes and the support mechanism, placing the planetary carrier in a pre-processing state. The cover plate, using its second positioning element to cooperate with the first positioning element on the base, covers the planetary carrier to be processed. Each pin passes through its corresponding blanking hole. Under the constraint of the cover plate, all pins fall into the opening position of the pin holes of the planetary carrier in the pre-processing state. During press-fitting, the planetary carrier is clamped between the base and the cover plate under pressure. The pins are pressed into the pin holes of the planetary carrier under the axial pressure of the press head and the radial limiting action of the cover plate, effectively reducing the tilting of the pins during press-fitting. Furthermore, by selecting a suitable-sized press head, when the press head can completely cover all the pins, all pins can be pressed into the planetary carrier simultaneously under the limiting action of the cover plate, effectively improving the press-fitting efficiency of multiple pins on the planetary carrier. The implementation can include any or all of the following features.

[0008] In one embodiment, the base is provided with a first bearing surface for contacting the planetary carrier; the support mechanism includes a first end and a second end, the first end and the second end are disposed opposite to each other, the first end is fixed to the base, the second end faces the cover plate and protrudes from the first bearing surface, when the planetary carrier pin is press-fitted, the second end supports the pin and moves away from the cover plate.

[0009] In one embodiment, the support mechanism includes an elastic element and a rigid element. One end of the elastic element is fixed to the base, and the other end is fixed to the rigid element. The second end is located at the end of the rigid element. When the elastic element undergoes elastic deformation, the second end moves in a direction away from or close to the cover plate.

[0010] In one embodiment, a mounting hole is formed in the base, the mounting hole is located in the area of ​​the first bearing surface, the mounting hole is arranged along the height direction of the base, and the elastic member and a portion of the rigid member are located in the mounting hole.

[0011] In one embodiment, the mounting hole includes a first segment and a second segment, the first segment and the second segment are connected, the diameter of the first segment is smaller than the diameter of the second segment, and the elastic element is confined within the second segment; the rigid element includes a head and a tail, one side of the head is fixed to the elastic element, the other side is fixed to the tail, the outer diameter of the head is larger than the diameter of the first segment, and the head is confined within the second segment.

[0012] In one embodiment, the base is further provided with a second bearing surface, which surrounds the outer periphery of the first bearing surface. The second bearing surface and the first bearing surface form a stepped structure. The second bearing surface is higher than the first bearing surface. The first positioning member is located in the area of ​​the second bearing surface. The shape of the stepped structure matches the shape of the planetary carrier. The first bearing surface is recessed downward to form a blind hole. The support mechanism is distributed around the outer periphery of the blind hole.

[0013] In one embodiment, the cover plate has a positioning part on the side facing the base, and the shape of the positioning part matches the shape of the planetary carrier.

[0014] In one embodiment, the base further includes a bottom plate, which is fixed to one end of the base opposite to the cover plate.

[0015] In one embodiment, the base is further provided with a recess, the recess including a second recess located on the second bearing surface, the second recess extending to the outer edge of the base.

[0016] In one embodiment, the recess further includes a first recess located at the edge of the first bearing surface, and the first recess communicates with the second recess.

[0017] In summary, this utility model provides a planetary carrier pin tooling, which has the following beneficial effects: First, the cover plate structure can simultaneously provide radial restraint for multiple pins, thereby guiding the pins throughout the entire pin pressing process until the pins are pressed in, which can reduce the problem of pins tilting when pressed into the planetary carrier.

[0018] Secondly, the combination of the base and the cover plate can simultaneously position the planetary carrier and multiple pins to be processed. When a pressure head of appropriate size is selected, all pins on the planetary carrier can be press-fitted at once, significantly improving the efficiency of planetary carrier pin press-fitting.

[0019] Third, the elastic element enables the support mechanism to generate axial elastic deformation. In the initial stage of press-fitting, the pin does not contact the support mechanism, and the support mechanism plays a positioning role for the planetary carrier. As the pin is pressed in, when the pin contacts the support mechanism, the elastic element of the support mechanism is elastically compressed under the downward pressure of the pin, which can continuously provide support for the pin without interfering with the downward pressure of the pin. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the planetary carrier pin tooling after press-fitting. Figure 2 This is a schematic diagram of the overall structure of the planetary carrier pin tooling base of this utility model; Figure 3 This is a schematic diagram of the overall structure of the planetary carrier pin tooling cover plate of this utility model; Figure 4 This is a cross-sectional structural diagram of the planetary carrier pin tooling after press-fitting. Figure 5 This is an exploded structural diagram of the planetary carrier pin tooling of this utility model in the press-fit state. Explanation of reference numerals in the attached figures: 1. Base; 11. Recessed area; 111. First bearing surface; 112. Second bearing surface; 113. Connecting surface; 114. Blind hole; 12. First positioning element; 13. Mounting hole; 131. First section; 132. Second section; 14. Recess; 141. First recess; 142. Second recess; 15. Base plate; 2. Cover plate; 21. Second positioning component; 22. Positioning part; 23. Material discharge hole; 3. Supporting mechanism; 31. Elastic component; 32. Rigid component; 321. Head; 322. Tail; 4. Planet carrier; 41. Pin hole; 42. Pin; 43. Sun gear. Detailed Implementation

[0021] To make the objectives and technical solutions of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The directional terms mentioned in the following embodiments, such as up, down, left, right, front, back, bottom, and top, are only for reference to the accompanying drawings. Therefore, the directional terms used are for illustrative purposes and not for limiting the present utility model.

[0022] This utility model discloses a planetary carrier pin tooling, hereinafter referred to as the tooling. (Refer to...) Figure 1 It includes a base 1 and a cover plate 2, the cover plate 2 is detachably connected to the base 1, and the planetary carrier 4 is clamped between the base 1 and the cover plate 2.

[0023] Reference Figure 2 The base 1 has a first bearing surface 111, which abuts against the lower surface of the planet carrier 4. A second bearing surface 112 is provided around the outer periphery of the first bearing surface 111. The second bearing surface 112 is parallel to the first bearing surface 111 and is higher than the first bearing surface 111. A connecting surface 113 is connected to the ends of the first and second bearing surfaces 111 that are close to each other. The connecting surface 113 is perpendicular to the first and second bearing surfaces 111, forming a stepped structure at the ends of the first and second bearing surfaces 111 that are close to each other. A recessed area 11 with the first bearing surface 111 as its base is formed on the upper surface of the base 1. The recessed area 11 matches the shape of the planet carrier 4 and is used to place the planet carrier 4. A blind hole 114 is formed by a downward indentation at the center of the first bearing surface 111. The blind hole 114 matches the shape of the sun gear 43 of the planet carrier 4 and is used to place the sun gear 43 of the planet carrier 4. A first positioning element 12 is fixed on the second bearing surface 112. One end of the first positioning element 12 is fixed to the second bearing surface 112, and the other end protrudes from the second bearing surface 112. At least two mutually symmetrical first positioning elements 12 are provided on the second bearing surface 112. The first positioning element 12 is a positioning rod.

[0024] Reference Figure 3The cover plate 2 is provided with a second positioning member 21 that cooperates with the first positioning member 12. The second positioning member 21 is a through hole provided along the thickness direction of the cover plate 2. The first positioning member 12 is used to pass through the second positioning member 21. The first positioning member 12 and the second positioning member 21 are in clearance fit. The first positioning member 12 and the second positioning member 21 are used to realize the positioning of the cover plate 2 on the base 1.

[0025] Reference Figure 4 The base 1 is a solid structure. Vertical mounting holes 13 are formed along the height of the base 1. These mounting holes 13 are located within and penetrate the first bearing surface 111. The number and position of the mounting holes 13 correspond to the pin holes 41 on the planetary carrier 4. The mounting holes 13 are used to mount the support mechanism 3. The support mechanism 3 includes an elastic element 31 and a rigid element 32. The elastic element 31 is entirely located within the mounting hole 13. One end of the elastic element 31 is fixed to the base 1 along its length, and the other end is fixed to the rigid element 32. The elastic element 31 is a spring, and the spring extends and retracts along the length of the mounting hole 13. Before the pin 42 is pressed in, the rigid member 32, supported by the elastic member 31, has one end in the mounting hole 13 and the other end protruding from the mounting hole 13 and onto the first bearing surface 111. The outer diameter of this part of the rigid member 32 protruding from the first bearing surface 111 is smaller than the diameter of the pin hole 41. This part of the rigid member 32 is used to position the planetary carrier 4 to be pressed in the pin hole 41. The height of the rigid member 32 protruding from the first bearing surface 111 is less than the length of the pin hole 41. During pressing, after the downward-moving pin 42 contacts the rigid member 32 of the support mechanism 3, the top end of the rigid member 32 abuts against the bottom end of the pin 42. The rigid member 32 uses the elasticity of the elastic member 31 to continuously provide support for the pin 42 and moves downward as the pin 42 is pressed in until the pin 42 is fully pressed in.

[0026] Reference Figure 4The mounting hole 13 includes a first segment 131 and a second segment 132. The first segment 131 connects to the upper end of the second segment 132, and the diameter of the first segment 131 is smaller than the diameter of the second segment 132. An elastic element 31 is located in the second segment 132 of the mounting hole 13. The outer diameter of the elastic element 31 is smaller than the diameter of the second segment 132 but larger than the diameter of the first segment 131, ensuring that the elastic element 31 is always confined within the second segment 132 during movement. The rigid element 32 includes a head 321 and a tail 322. One side of the head 321 is fixed to the elastic element 31, and the other side is fixed to the tail 322. The tail 322 and the elastic element 31 are located at opposite ends of the head 321. The cross-sectional area of ​​the head 321 is larger than the cross-sectional area of ​​the tail 322, making the rigid element 32 an inverted "T" shape. The outer diameter of the head 321 is smaller than the diameter of the second section 132 of the mounting hole 13 but larger than the diameter of the first section 131 of the mounting hole 13. The outer diameter of the tail 322 is smaller than the diameter of the first section 131 of the mounting hole 13, so that the head 321 is always confined to the second section 132 during movement, while the tail 322 can move within the first and second sections 131 of the mounting hole 13. The shape and size design of the mounting hole 13 and the rigid member 32 ensures the stable installation of the support mechanism 3 in the base 1, avoids abnormal stretching of the elastic member 31 causing tooling damage, and prevents the rigid member 32 from being pulled out of the mounting hole 13.

[0027] Reference Figure 2 The base 1 also has a recess 14, which is recessed downwards along the height direction of the base 1. The recess 14 includes a first recess 141 and a second recess 142, which are radially connected along the base 1. The first recess 141 is located on the first bearing surface 111, and the second recess 142 is located on the second bearing surface 112. The first recess 141 is located at the edge of the first bearing surface 111, and the second recess 142 extends to the outer edge of the base 1. The base 1 also includes a base plate 15, which is fixed to the end of the base 1 opposite to the cover plate 2. The cross-sectional area of ​​the base plate 15 is larger than that of the base 1. The base plate 15 is used to stably place the base 1 in the use position. The end of the elastic member 31 away from the rigid member 32 is fixed to the base plate 15. The base plate 15 can be fixed to the base 1 by means of bolts or welding, but is not limited to.

[0028] Reference Figure 3A positioning part 22 is provided on the side of the cover plate 2 facing the base 1. The positioning part 22 is formed by recessing inward along the lower surface of the cover plate 2. The shape of the positioning part 22 matches the shape of the upper end of the planetary carrier 4, which is used to enhance the positioning effect of the tooling on the planetary carrier 4. A blanking hole 23 is also provided on the cover plate 2. The second positioning member 21 is located on the outer periphery of the blanking hole 23. The blanking hole 23 is a through hole and extends vertically along the thickness direction of the cover plate 2. The length of the blanking hole 23 is less than the length of the pin 42. The number and position of the blanking holes 23 correspond to the pin holes 41 on the planetary carrier 4. The blanking holes 23 are used to place the pin 42 and make the cover plate 2 play a radial limiting role on the pin 42 during the pressing of the pin 42, providing vertical guidance for the pressing of the pin 42.

[0029] The implementation principle of the planetary carrier 4-pin 42 press-fitting fixture in this embodiment of the utility model is as follows: Reference Figure 5 Before the press-fitting begins, the rigid member 32 protrudes from the first bearing surface 111 under the support of the elastic part. The side of the planetary carrier 4 with the sun gear 43 is placed in the recessed area 11 formed by the first bearing surface 111, the connecting surface 113, and the second bearing surface 112. The lower surface of the planetary carrier 4 abuts against the first bearing surface 111. The sun gear passes through the blind hole 114. The bottom surface of the positioning part 22 of the cover plate 2 abuts against the upper end surface of the planetary carrier 4. The second positioning member 21 of the cover plate 2 is sleeved on the first positioning member 12 of the base 1. There is a gap between the lower surface of the cover plate 2 and the second bearing surface 112. The front end of the rigid member 32 passes through the lower half of the pin hole 41 of the planetary carrier 4, realizing the clamping and positioning of the cover plate 2 and the base 1 on the planetary carrier 4. At this time, the support mechanism 3 is aligned with the pin hole 41 of the planetary carrier 4, and the blanking hole 23 is aligned with the pin hole 41 of the planetary carrier 4. The pin 42 to be pressed into the pin hole 41 is inserted into the blanking hole 23. The lower part of the pin 42 is restricted vertically in the blanking hole 23, and the lower end of the pin 42, under the restriction of the blanking hole 23, abuts against the upper edge of the pin hole 41 of the planetary carrier 4 vertically. The upper part of the pin 42 protrudes from the upper surface of the cover plate 2. Select a pressure head that can cover all the pins 42, start the press, and the pin 42 is pressed vertically into the pin hole 41 under the pressure of the press and the radial limiting action of the cover plate 2. After the lower end of the pin 42 contacts the top of the rigid member 32, the elastic member 31 supports the pin 42 under the pressure of the press and drives the rigid member 32 to move downward until the pin 42 is pressed in. Figure 4When the press-fitting is complete, the lower part of the pin 42 passes into the pin hole 41 and is press-fitted with the pin hole 41. The upper end face of the pin 42 is flush with the upper surface of the cover plate 2. The axial positional relationship between the pin 42 and the planetary carrier 4 is limited by the thickness of the cover plate 2. The cover plate 2 can ensure that all the pins 42 protrude from the upper surface of the planetary carrier 4 at the same height after press-fitting, while absorbing the thickness deviation of the planetary carrier 4. After press-fitting is completed, the press head is removed, and the cover plate 2 is removed by hand or tool by reaching into the second recess 142 of the base 1. The first recess 141 is then reached into to remove the press-fitted planetary carrier 4. This fixture can simultaneously provide radial restraint for multiple pins 42, provide guidance for the pins 42 throughout the press-fitting process, reduce the problem of the pins 42 tilting when pressed into the planetary carrier 4, and can achieve the press-fitting of all the pins 42 on the planetary carrier 4 at one time when a press head of appropriate size is selected, significantly improving the press-fitting efficiency of the pins 42 on the planetary carrier 4.

[0030] Except for the selection of a larger-sized press head, the press and press head involved in this application adopt the same structure as the prior art. For example, the press can be a stamping press, and the press head can be a rigid press block connected to the pressure output end of the stamping press and moving linearly in the vertical direction under the drive of the press drive structure. The side of the press head facing the cover plate 2 is a plane.

[0031] Of course, the above embodiments are the preferred embodiments of this utility model, and are only used to illustrate the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly, and should not be used to limit the protection scope of this utility model. All modifications made in accordance with the spirit and essence of the main technical solution of this utility model should be included within the protection scope of this utility model.

Claims

1. A planetary carrier pin tooling, characterized in that, It includes a base and a cover plate, the base and the cover plate are used to clamp on both sides of the planetary carrier, the base is provided with a first positioning member, the cover plate is provided with a second positioning member and a material discharge hole, the second positioning member is located on the outer periphery of the material discharge hole, and the second positioning member is used to connect with the first positioning member; A support mechanism is provided on the base. The support mechanism is located inside the first positioning member. During press-fitting, the support mechanism abuts against the pin.

2. The planetary carrier pin tooling as described in claim 1, characterized in that, The base is provided with a first bearing surface, which is used to abut against the planetary carrier; the support mechanism includes a first end and a second end, which are arranged opposite to each other. The first end is fixed to the base, and the second end faces the cover plate and protrudes from the first bearing surface. When the planetary carrier pin is press-fitted, the second end supports the pin and moves away from the cover plate.

3. The planetary carrier pin tooling as described in claim 2, characterized in that, The support mechanism includes an elastic element and a rigid element. One end of the elastic element is fixed to the base, and the other end is fixed to the rigid element. The second end is located at the end of the rigid element. When the elastic element undergoes elastic deformation, the second end moves in a direction away from or close to the cover plate.

4. The planetary carrier pin tooling as described in claim 3, characterized in that, The base has mounting holes located within the first bearing surface area. The mounting holes are positioned along the height of the base, and the elastic member and a portion of the rigid member are located within the mounting holes.

5. The planetary carrier pin tooling as described in claim 4, characterized in that, The mounting hole includes a first section and a second section, which are connected. The diameter of the hole in the first section is smaller than that in the second section, and the elastic element is confined within the second section. The rigid element includes a head and a tail. One side of the head is fixed to the elastic element, and the other side is fixed to the tail. The outer diameter of the head is larger than that in the first section, and the head is confined within the second section.

6. The planetary carrier pin tooling as described in claim 2, characterized in that, The base is also provided with a second bearing surface, which surrounds the outer periphery of the first bearing surface. The second bearing surface and the first bearing surface form a stepped structure. The second bearing surface is higher than the first bearing surface. The first positioning member is located in the area of ​​the second bearing surface. The shape of the stepped structure matches the shape of the planetary carrier. The first bearing surface is recessed downward to form a blind hole. The support mechanism is distributed around the outer periphery of the blind hole.

7. The planetary carrier pin tooling as described in claim 1, characterized in that, The cover plate has a positioning part on the side facing the base, and the shape of the positioning part matches the shape of the planetary carrier.

8. The planetary carrier pin tooling as described in claim 1, characterized in that, The base also includes a bottom plate, which is fixed to one end of the base opposite to the cover plate.

9. A planetary carrier pin tooling as described in claim 6, characterized in that, The base is also provided with a recess, the recess including a second recess located on the second bearing surface, the second recess extending to the outer edge of the base.

10. The planetary carrier pin tooling as described in claim 9, characterized in that, The recess further includes a first recess located at the edge of the first bearing surface, and the first recess communicates with the second recess.

Images