Press fitting jig

Abstract

The utility model relates to mechanical equipment field, concretely relates to a press -fitting clamp, including upper base, lower base, upper positioning subassembly and lower positioning subassembly, and the lower base is equipped with first mount seat for placing planet wheel big tooth, and the upper base is equipped with second mount seat for placing planet wheel small tooth and with first mount seat coaxial, and the upper base and lower base are equipped with a plurality of equal interval installation in the outside of first positioning mandrel and second positioning mandrel compression spare, and the upper positioning subassembly sets up in the upper base and positions planet wheel small tooth, and the lower positioning subassembly installs on the lower base and positions planet wheel big tooth, the utility model relates to a press -fitting clamp, can ensure the relative position accuracy of planet wheel big tooth and planet wheel small tooth when assembling, simple operation, and assembling quality and assembling efficiency are high, and can avoid the damage to gear in the use process.

Description

Technical Field

[0001] This utility model relates to the field of mechanical equipment, specifically to a press-fitting fixture. Background Technology

[0002] Double planetary gears are an important structure in planetary gear mechanisms. They typically refer to a combination of two meshing planetary gears or those meshing with other gears. Generally, they consist of large and small planetary gears, usually mounted on the same shaft and rotating as a single unit. The sun gear meshes with the large planetary gears, and the internal ring gear meshes with the small planetary gears. This structure allows for a large transmission ratio and high torque transmission within a compact space.

[0003] In existing technologies, when manufacturing double planetary gears, alignment marks are made on specific teeth or tooth grooves of the large and small gears. For example, the center lines of one tooth or tooth groove in each of the two gear rings coincide on the same radial straight line. During installation, these marks are aligned with specific positions on relevant components, depending on the type of planetary gear transmission system. If the double planetary gears do not have alignment marks, the installation position can be determined by trial assembly tooth by tooth. Through continuous attempts, the position where both the large and small teeth can correctly mesh with the sun gear, internal gear ring, and other components can be found. However, both of these methods are relatively cumbersome, involve a large workload, and are prone to damaging the gears. Problems such as excessive radial runout and uneven tooth surface contact can easily occur, leading to a chain reaction of increased transmission noise and uneven load distribution when applied to high-precision reducers.

[0004] Therefore, there is an urgent need for an assembly tool for the large and small teeth of planetary gears in a double planetary gear system, which can ensure the relative positional accuracy of the large and small teeth of planetary gears during assembly, is simple to operate, has high assembly quality and efficiency, and can avoid damage to the gears during use. Utility Model Content

[0005] The present invention aims to provide a press-fit fixture that can ensure the relative positional accuracy of the large and small teeth of the planetary gears during assembly. It is simple to operate, highly efficient, and can avoid damage to the gears during use.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a press-fitting fixture, comprising an upper base, a lower base, an upper positioning component, and a lower positioning component. The lower base is provided with a first mounting seat for placing the large teeth of the planetary gears, and the upper base is provided with a second mounting seat for placing the small teeth of the planetary gears and coaxial with the first mounting seat. The upper base and the lower base are provided with a plurality of compression members installed at equal intervals on the outside of the first positioning mandrel and the second positioning mandrel. The upper positioning component is set on the upper base to position the small teeth of the planetary gears, and the lower positioning component is installed on the lower base to position the large teeth of the planetary gears.

[0007] The beneficial effects of this solution are as follows: Through the synergistic action of the upper and lower positioning components, precise positioning is achieved during the assembly of the double planetary gears. Specifically, the coaxial design of the first and second positioning seats ensures the alignment of the axes of the large and small gears. The uniform pressing force provided by the compression component prevents gear misalignment. Compared with existing technologies, this solution eliminates the marking and alignment process, directly ensuring the meshing phase through mechanical positioning. The gears are subjected to uniform force during pressing, effectively preventing damage to the tooth surfaces. The combined use of the positioning mandrel and elastic element ensures assembly accuracy and adapts to the pressing requirements of gears of different specifications.

[0008] Furthermore, the upper positioning component includes an upper positioning seat, an upper positioning pin, and an upper locking screw. The upper positioning seat is mounted on the upper base. The upper positioning seat has an upper positioning hole through which the upper positioning pin can pass. The tail of the upper locking screw has an inwardly recessed upper T-shaped groove, and the head of the upper locking screw has an upper T-shaped end that is embedded in the upper T-shaped groove.

[0009] Furthermore, the lower positioning component includes a lower positioning seat, a lower positioning pin, and a lower locking screw. The lower positioning seat is mounted on the lower base. The lower positioning seat has an upper positioning hole through which the lower positioning pin can pass. The tail of the lower locking screw has an inwardly recessed upper T-shaped groove, and the head of the lower locking screw has an upper T-shaped end that is embedded in the upper T-shaped groove.

[0010] Furthermore, the upper positioning seat has an upper support on the side of the upper locking screw, and the lower positioning seat has a lower support on the side of the lower locking screw. Both the upper and lower supports have bolt holes, and both the upper and lower locking screws have threaded sections that mate with the bolt holes.

[0011] Furthermore, the first mounting base is provided with a through hole, and a plug is provided at the bottom of the through hole. A first elastic reset member is provided on the plug. A lower positioning spindle is provided inside the through hole. The bottom of the lower positioning spindle is connected to the first elastic reset member, and the top of the lower positioning spindle protrudes through the through hole.

[0012] Furthermore, the portion of the planetary gear small teeth pressed into the inner hole of the planetary gear large teeth can drive the top of the lower positioning mandrel to retract into the through hole.

[0013] Furthermore, the second mounting base is provided with an upper positioning mandrel that is coaxial with the lower positioning mandrel and can pass through the inner hole of the planetary gear pinion. The positioning mandrel has a radial hole, and a ball screw is provided in the radial hole to prevent the planetary gear pinion from slipping.

[0014] Furthermore, the compression component includes a slide rod disposed on the upper base and a slide sleeve disposed on the lower base. A second elastic reset component is sleeved on the slide rod, and the slide rod is located inside the slide sleeve and can be driven to compress within the slide sleeve. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 An enlarged schematic diagram of part A in the middle; Figure 3 for Figure 1 Enlarged schematic diagram of part B.

[0016] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: upper base 1, lower base 2, first mounting seat 3, planetary gear large tooth 4, second mounting seat 5, planetary gear small tooth 6, upper positioning seat 7, upper positioning pin 8, upper locking screw 9, upper positioning hole 10, upper T-slot 11, upper T-shaped end 12, lower positioning seat 13, lower positioning pin 14, lower locking screw 15, lower positioning hole 16, lower T-slot 17, lower T-shaped end 18, upper support 19, lower support 20, bolt hole 21, through hole 22, plug 23, first elastic reset element 24, lower positioning mandrel 25, upper positioning mandrel 26, radial hole 27, ball screw 28, slide rod 29, slide sleeve 30, and second elastic reset element 31. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] Example 1 The basic implementation examples are as follows: Figure 1 and attached Figure 2The press-fit fixture shown includes an upper base 1, a lower base 2, an upper positioning component, and a lower positioning component. The lower base 2 is provided with a first mounting seat 3 for placing the large planetary gear 4, and the upper base 1 is provided with a second mounting seat 5 for placing the small planetary gear 6 and coaxial with the first mounting seat 3. The upper base 1 and the lower base 2 are provided with multiple compression components installed at equal intervals on the outside of the first positioning mandrel and the second positioning mandrel. The upper positioning component is set on the upper base 1 to position the small planetary gear 6, and the lower positioning component is installed on the lower base 2 to position the large planetary gear 4. During the press-fitting process, the top of the upper base 1 is pressed, and the upper positioning component, the upper base 1, the second mounting seat 5, and the small planetary gear 6 move downwards relatively statically without misalignment. The coaxial design of the first mounting seat 3 and the second mounting seat 5 ensures that the axes of the large and small gears coincide, and the uniform pressing force provided by the compression components avoids gear skewing.

[0020] The upper positioning assembly includes an upper positioning seat 7, an upper positioning pin 8, and an upper locking screw 9. The upper positioning seat 7 is mounted on the upper base 1. The upper positioning seat 7 has an upper positioning hole 10 through which the upper positioning pin 8 can pass and which is perpendicular to the second mounting seat 5. The tail of the upper locking screw 9 has an inwardly recessed upper T-shaped groove 11, and the head of the upper locking screw 9 has an upper T-shaped end 12 that is embedded in the upper T-shaped groove 11. The lower positioning assembly includes a lower positioning seat 13, a lower positioning pin 14, and a lower locking screw 15. The lower positioning seat 13 is mounted on the lower base 2. The lower positioning seat 13 has a lower positioning hole 16 through which the lower positioning pin 14 can pass and which is perpendicular to the first mounting seat 3. The tail of the lower locking screw 15 has an inwardly recessed upper T-shaped groove 11, and the head of the lower locking screw 15 has an upper T-shaped end 12 that is embedded in the upper T-shaped groove 11. As shown in the attached figure. Figure 2 As shown, the upper T-shaped end 12 is embedded in the upper T-shaped groove 11, and the lower T-shaped end 18 is embedded in the lower T-shaped groove 17. The T-shaped groove design allows the operator to adjust the position of the upper positioning pin 8 and the lower positioning pin 14 by simply operating the upper locking screw 9 and the lower locking screw 15. The upper positioning seat 7 has an upper support 19 on the side of the upper locking screw 9, and the lower positioning seat 13 has a lower support 20 on the side of the lower locking screw 15. Both the upper support 19 and the lower support 20 have bolt holes 21. Both the upper locking screw 9 and the lower locking screw 15 have threaded sections that mate with the bolt holes 21. The bolt holes 21 are used to mate with the threaded sections on the upper locking screw 9 and the lower locking screw 15 to achieve fixation and enhance installation stability.

[0021] The upper base 1, lower base 2, upper positioning seat 7, and lower positioning seat 13 can all be fixedly installed in the corresponding positions mentioned above using bolts, or other mechanical installation methods can be used, which will not be elaborated here. The upper positioning pin 8 and lower positioning pin 14 are perpendicular to the first mounting seat 3 and the second mounting seat 5, respectively, which can ensure that the upper positioning pin 8 is perpendicularly abutted on the tooth surface of the planetary gear small tooth 6, and the lower positioning pin 14 is perpendicularly abutted on the tooth surface of the planetary gear large tooth 4, thereby achieving radial positioning of the planetary gear large tooth 4 and the planetary gear small tooth 6.

[0022] The compression component includes a slide rod 29 mounted on the upper base 1 and a slide sleeve 30 mounted on the lower base 2. A second elastic reset component 31 is fitted onto the slide rod 29. The slide rod 29 is located within the slide sleeve 30 and can be driven to compress within the slide sleeve 30. The slide rod 29 and the slide sleeve 30 are in a clearance fit, with the outer diameter of the slide rod 29 slightly smaller than the inner diameter of the slide sleeve 30, forming a sliding pair. The top end of the slide rod 29 is fixed to the upper base 1 by threads or snap fasteners, and the bottom of the slide sleeve 30 is fixed to the lower base 2 by bolts. The second elastic reset component 31 is preferably a helical spring, with its two ends abutting against the lower end face of the upper base 1 and the upper end face of the slide sleeve 30, respectively. When the upper base 1 is subjected to an external force and moves downward, the slide rod 29 slides along the inner wall of the slide sleeve 30, and the spring is compressed; after the external force is removed, the spring pushes the slide rod 29 to reset.

[0023] Example 2 The basic implementation examples are as follows: Figure 1 and attached Figure 3 As shown, the first mounting base 3 has a through hole 22, and a plug 23 is provided at the bottom of the through hole 22. A first elastic reset member 24 is provided on the plug 23. A lower positioning spindle 25 is provided inside the through hole 22. The bottom of the lower positioning spindle 25 is connected to the first elastic reset member 24, and the top of the lower positioning spindle 25 protrudes through the through hole 22. The through hole 22 penetrates the first positioning base axially, and its diameter forms a clearance fit with the lower positioning spindle 25. The plug 23 is fixed to the bottom of the through hole 22 by a threaded connection or an interference fit. The first elastic reset member 24 is preferably a helical spring, one end of which abuts against the inner side of the plug 23, and the other end is connected to the annular boss at the bottom of the lower positioning spindle 25.

[0024] The portion of the planetary gear small tooth 6 pressed into the inner hole of the planetary gear large tooth 4 can drive the top of the lower positioning mandrel 25 to retract into the through hole 22; the positioning mandrel is initially ejected by the first elastic reset member 24, providing a precise positioning reference for the planetary gear large tooth 4; when the planetary gear small tooth 6 is pressed into place, its inner hole end face pushes the lower positioning mandrel 25 to overcome the elastic force and completely retract into the through hole 22, realizing automatic avoidance of the lower positioning mandrel 25 during the pressing process of the planetary gear small tooth 6; the second mounting base 5 is provided with an upper positioning mandrel 26 that is coaxial with the lower positioning mandrel 25 and can pass through the inner hole of the planetary gear small tooth 6, and the positioning mandrel has a radial hole 27, in which a ball screw 28 is provided to prevent the planetary gear small tooth 6 from sliding; the upper positioning mandrel 26 and the lower positioning mandrel 25 maintain a coaxial relationship to ensure the alignment of the planetary gear small tooth 6 and the planetary gear large tooth 4 during the pressing process. The radial hole 27 is opened along the radial direction of the upper positioning mandrel 26. The ball screw 28 is installed in the radial hole 27, and the steel ball protrudes from the surface of the upper positioning mandrel 26 by spring pressure. When the inner hole of the planetary gear pinion 6 is fitted into the upper positioning mandrel 26, the steel ball of the ball screw 28 generates frictional resistance with the inner hole wall, thereby preventing the planetary gear pinion 6 from sliding axially during the press-fitting process.

[0025] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A press-fitting fixture, characterized in that: It includes an upper base, a lower base, an upper positioning component, and a lower positioning component. The lower base is provided with a first mounting seat for placing the large teeth of the planetary gears, and the upper base is provided with a second mounting seat for placing the small teeth of the planetary gears and coaxial with the first mounting seat. The upper base and the lower base are provided with multiple compression members that are equally spaced and installed on the outside of the first positioning mandrel and the second positioning mandrel. The upper positioning component is set on the upper base to position the small teeth of the planetary gears, and the lower positioning component is installed on the lower base to position the large teeth of the planetary gears.

2. The press-fitting fixture according to claim 1, characterized in that: The upper positioning assembly includes an upper positioning seat, an upper positioning pin, and an upper locking screw. The upper positioning seat is mounted on the upper base. The upper positioning seat has an upper positioning hole through which the upper positioning pin can pass and which is perpendicular to the second mounting seat. The tail of the upper locking screw has an inwardly recessed upper T-shaped groove, and the head of the upper locking screw has an upper T-shaped end that is embedded in the upper T-shaped groove.

3. The press-fitting fixture according to claim 2, characterized in that: The lower positioning assembly includes a lower positioning seat, a lower positioning pin, and a lower locking screw. The lower positioning seat is mounted on the lower base. The lower positioning seat has a lower positioning hole through which the lower positioning pin can pass and which is perpendicular to the first mounting seat. The tail of the lower locking screw has an inwardly recessed upper T-shaped groove, and the head of the lower locking screw has an upper T-shaped end that is embedded in the upper T-shaped groove.

4. A press-fitting fixture according to claim 3, characterized in that: The upper positioning seat has an upper support on the side of the upper locking screw, and the lower positioning seat has a lower support on the side of the lower locking screw. Both the upper and lower supports have bolt holes, and both the upper and lower locking screws have threaded sections that mate with the bolt holes.

5. A press-fitting fixture according to claim 1, characterized in that: The first mounting base has a through hole, and a plug is provided at the bottom of the through hole. A first elastic reset member is provided on the plug. A lower positioning spindle is provided inside the through hole. The bottom of the lower positioning spindle is connected to the first elastic reset member, and the top of the lower positioning spindle protrudes through the through hole.

6. A press-fitting fixture according to claim 5, characterized in that: The portion of the planetary gear small teeth pressed into the inner hole of the planetary gear large teeth can drive the top of the lower positioning mandrel to retract into the through hole.

7. A press-fitting fixture according to claim 5, characterized in that: The second mounting base has an upper positioning mandrel that is coaxial with the lower positioning mandrel and can pass through the inner hole of the planetary gear pinion. The positioning mandrel has a radial hole, and a ball screw is installed in the radial hole to prevent the planetary gear pinion from slipping.

8. A press-fitting fixture according to claim 1, characterized in that: The compression component includes a slide rod disposed on the upper base and a slide sleeve disposed on the lower base. A second elastic reset component is sleeved on the slide rod. The slide rod is located inside the slide sleeve and can be driven to compress within the slide sleeve.

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