Fixture device for circumferential welding of planet carrier

Abstract

The utility model discloses a fixture device for planet carrier circumference welding, which comprises a positioning disc, the positioning disc comprises a disc body, the edge of the disc body is provided with three positioning holes, and the three positioning holes are coaxial with bolt holes on a front side plate and a rear side plate of a planet carrier; the positioning columns penetrate through the positioning holes in a sliding fit mode and then are inserted into the corresponding bolt holes in the front side plate and the rear side plate of the planet carrier in a sliding mode. The pressing gasket is parallel to one end face, back to the positioning disc, of the planet carrier front side plate and the planet carrier rear side plate; the locking bolt penetrates through the pressing gasket and then is connected to the positioning disc in a threaded mode so that the pressing gasket can abut against the end faces of the front side plate and the rear side plate of the planet carrier in a pressing mode. By means of the structure, the front side plate and the rear side plate of the planet carrier are stably and oppositely clamped during welding, the welding quality of the front side plate and the rear side plate of the planet carrier is guaranteed, and errors of subsequent machining are reduced.

Description

Technical Field

[0001] The utility model relates to a welding fixture device, in particular to a fixture device for circumferential welding of a planetary frame. Background Art

[0002] In a coaxial gearbox, the planetary carrier, which serves as the power transmission hub, is indispensable. To save costs, the planetary carrier is usually formed by circumferentially welding the front and rear plates. How to align the front and rear plates of the planetary carrier vertically and align the three eccentric holes at the top and bottom is a key issue in the processing of this type of product. Currently, the company's production is manually aligned by visual inspection. In actual production, it has been found that the upper and lower eccentric holes will deviate, increasing the allowance for subsequent boring and easily causing stress deformation, which increases costs. The weld seam is difficult to align during welding, seriously affecting quality, increasing the labor intensity of operators, and causing defective products to flow into the next process. Utility Model Content

[0003] The purpose of the utility model is to provide a planetary carrier circumferential welding fixture device, which can keep the front side plate of the planetary carrier and the rear side plate of the planetary carrier aligned up and down during welding, thereby ensuring welding quality.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A fixture device for circumferential welding of a planetary carrier, comprising

[0006] A positioning plate, the positioning plate comprising a plate body, the edge of the plate body being provided with three positioning holes, the three positioning holes being coaxially arranged with the bolt holes on the front and rear side plates of the planet carrier;

[0007] Positioning posts, which are slidably fitted through the positioning holes and then slidably inserted into the corresponding bolt holes on the front and rear side plates of the planet carrier;

[0008] The compression gasket is arranged parallel to one end surface of the front and rear side plates of the planet carrier facing away from the positioning plate;

[0009] The locking bolt passes through the compression washer and is screwed onto the positioning plate so that the compression washer is pressed against the end surfaces of the front and rear side plates of the planet carrier.

[0010] Preferably, a retaining ring is further provided on the edge of the compression gasket, and after the compression gasket is pressed against one end surface of the front and rear side plates of the planetary carrier, the retaining ring is smoothly sleeved on the outer curved surface of the front and rear side plates of the planetary carrier.

[0011] Preferably, the positioning hole includes a first through hole and a second through hole, and the first through hole and the second through hole are coaxially arranged and stacked in a stepped manner; the positioning column includes a first guide portion and a second guide portion that are coaxially arranged, and the first guide portion slides through the first through hole portion and then slides into the bolt holes opened on the front and rear side plates of the planetary frame, and the second guide portion slides into the second through hole.

[0012] Preferably, the positioning plate is provided with an axially extending protrusion, which extends into the front and rear side plates of the star frame and is arranged close to the compression gasket, and the locking bolt passes through the compression gasket and is screwed into the protrusion.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] This solution ensures that the front and rear side plates of the planetary carrier remain aligned during welding by creating three locating holes on the locating plate that are coaxial with the front and rear side plates of the planetary carrier. Locating posts are inserted into the locating holes to align the locating plate and the front and rear side plates of the planetary carrier. Furthermore, a clamping washer and locking bolts are used to clamp the front and rear side plates of the planetary carrier between the locating plate and the clamping washer, preventing the front and rear side plates from separating during welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic structural diagram of the positioning plate in the present utility model;

[0017] Figure 3 This is a structural schematic diagram of the front and rear side plates of the planet carrier clamped by the present invention.

[0018] Reference numerals: 1. Positioning plate 11. Positioning hole 111. First through hole 112. Second through hole 12. Protruding portion 2. Positioning column 21. First guide portion 22. Second guide portion 3. Compression washer 31. Retaining ring 4. Locking bolt 5. Front and rear side plates of planet carrier. DETAILED DESCRIPTION

[0019] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0020] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0022] It's important to note that the planet carrier front and rear side plates are welded together by aligning the front and rear plates. However, if these plates are not secured during the welding process, welding stress and misalignment can cause them to shift after welding. To address this issue, this proposal proposes a circumferential welding fixture for the planet carrier to improve the welding accuracy of the front and rear plates.

[0023] Specific as Figures 1 to 3 As shown, it includes a positioning plate 1 having a smooth working surface so that after one end surface of the front and rear side plates of the planetary carrier abuts against the working surface, the three bolt holes opened on the front and rear side plates of the planetary carrier can remain coaxially aligned with the three positioning holes 11 opened on the positioning plate 1.

[0024] like Figure 1As shown, a positioning post 2 is also slidably inserted into the positioning hole. This positioning post also slidably inserts into bolt holes provided in the front and rear side plates of the planetary carrier to ensure that the bolt holes of the front and rear side plates of the planetary carrier remain aligned during welding. Based on the principle of three points defining a plane, when the three bolt holes of the front and rear side plates of the planetary carrier remain coaxial, the mating surfaces of the front and rear side plates of the planetary carrier can also be parallel and sealed. Furthermore, during the welding process, it is necessary to address the problem of separation between the front and rear side plates of the planetary carrier due to welding stress. To this end, a compression gasket 3 is also provided in this solution. This compression gasket is located on one end of the front and rear side plates of the planetary carrier, facing away from the working surface of the positioning plate, and is parallel to this end surface. When the compression gasket cooperates with the positioning plate to tightly clamp the front and rear side plates of the planetary carrier, separation due to welding stress can be effectively prevented during welding, thereby ensuring welding quality.

[0025] It should be noted that if Figure 1 As shown, the pressure of the compression gasket on the front and rear side plates of the planet carrier is achieved by a locking bolt 4. Specifically, the locking bolt passes through the compression gasket 4 and is screwed onto the positioning plate 1. By turning the locking bolt, the pressure of the compression gasket on the front and rear side plates of the planet carrier can be easily adjusted.

[0026] In addition, it should be noted that in order to further improve the positioning accuracy of the front and rear side plates of the planetary carrier, the clamping gasket 3 in this solution is also provided with a circle of retaining rings 31 on its edge. It should be noted that the outline of the area enclosed by the retaining ring is the same as the cross-section of one end of the front and rear side plates of the planetary carrier against which the clamping gasket abuts. That is, when the clamping gasket is pressed against the end faces of the front and rear side plates of the planetary carrier with pressure, the ends of the front and rear side plates of the planetary carrier can be smoothly inserted into the retaining rings. The retaining rings play a further guiding role here, so as to achieve two positioning of the front and rear side plates of the planetary carrier through cooperation with the positioning columns, thereby improving the positioning accuracy of the front and rear side plates of the planetary carrier after being clamped.

[0027] In addition, it should be noted that, based on the above scheme, some improvements have been made to ensure that the positioning column will not fall out of the positioning hole during the welding process. Specifically, the positioning hole includes a first through hole 111 and a second through hole 112. Among them, the first through hole and the second through hole are coaxial and overlapped together in the form of a stepped hole. In addition, it should be noted that the first through hole has the same caliber as the bolt hole opened on the front and rear side plates of the planetary frame, while the second through hole is larger than the first through hole. At the same time, the positioning column 2 is composed of a coaxial first guide portion 21 and a second guide portion 22. The first guide portion can be inserted into the first through hole and the bolt hole in a sliding manner to guide the front and rear side plates of the planetary frame. The second guide portion is inserted into the second through hole in a sliding manner to prevent the guide column from slipping out.

[0028] Furthermore, it should be noted that, in this embodiment, to facilitate the connection between the locking bolt and the positioning plate, an axially protruding projection 12 is provided on the positioning plate 1. This projection extends toward the interior of the front and rear side plates of the planetary carrier and is close to the compression gasket. After passing through the compression gasket, the locking bolt can be conveniently threaded into the projection 12. It should also be noted that the closer the projection is to the compression gasket, the less exposed the locking bolt is, and the probability of the locking bolt twisting and deforming during welding is relatively reduced, thereby ensuring the stability of the compression gasket during welding.

[0029] Working principle: Before welding the front and rear side plates of the planetary carrier, first insert the orientation column 2 into the positioning hole, then align the front and rear side plates of the planetary carrier and insert the guide column into the bolt hole of the front and rear side plates of the planetary carrier. After the above steps are completed, place the clamping gasket on the end surface of the front and rear side plates of the planetary carrier facing away from the positioning plate, then pass the locking bolt through the clamping gasket and tighten it so that the clamping gasket and the guide plate hold the front and rear side plates of the planetary carrier. At this time, the front and rear side plates of the planetary carrier are firmly fixed, and the front and rear side plates of the planetary carrier will not move relative to each other during the welding process, thus ensuring the welding quality of the front and rear side plates of the planetary carrier.

[0030] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fixture device for circumferential welding of a planetary carrier, characterized in that: include A positioning plate (1), the positioning plate (1) comprising a plate body, the edge of the plate body being provided with three positioning holes (11), the three positioning holes (11) being coaxially arranged with the bolt holes on the front and rear side plates (5) of the planetary carrier; A positioning column (2), wherein the positioning column (2) is slidably fitted through the positioning hole (11) and then slidably inserted into the bolt holes on the corresponding front and rear side plates (5) of the planetary frame; A compression gasket (3) is arranged parallel to an end surface of the front and rear side plates (5) of the planetary carrier and facing away from the positioning plate (1); The locking bolt (4) passes through the compression washer (3) and is screwed onto the positioning plate (1) so that the compression washer (3) is pressed against the end surfaces of the front and rear side plates (5) of the planet carrier.

2. A fixture device for circumferential welding of a planetary carrier according to claim 1, characterized in that: The edge of the compression gasket (3) is further provided with a retaining ring (31). After the compression gasket (3) is pressed against one end surface of the front and rear side plates (5) of the planetary carrier, the retaining ring (31) is smoothly sleeved on the outer curved surface of the front and rear side plates (5) of the planetary carrier.

3. A fixture device for circumferential welding of a planetary carrier according to claim 2, characterized in that: The positioning hole (11) includes a first through hole (111) and a second through hole (112), and the first through hole (111) and the second through hole (112) are coaxially arranged and stacked in a stepped manner; the positioning column (2) includes a first guide portion (21) and a second guide portion (22) coaxially arranged, and the first guide portion (21) slides through the first through hole (111) and then slides into the bolt holes provided on the front and rear side plates (5) of the planetary frame, and the second guide portion (22) slides into the second through hole (112).

4. A fixture device for circumferential welding of a planetary carrier according to claim 3, characterized in that: The positioning plate (1) is provided with an axially extending protrusion (12), which extends into the front and rear side plates of the star frame and is arranged close to the compression gasket (3), and the locking bolt (4) passes through the compression gasket (3) and is screwed into the protrusion (12).

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