Tripod universal joint convenient to assemble

Abstract

The utility model discloses a tripod universal joint convenient to assemble, and relates to the technical field of tripod universal joints, the tripod universal joint convenient to assemble comprises a tripod frame and a ball ring, three pin shafts are installed at the circumferential end of the tripod frame in an array mode, an adjusting mechanism facilitating rapid assembly of the ball ring is arranged on the tripod frame, and the adjusting mechanism is connected with the tripod frame. The three-pin frame is provided with a limiting mechanism facilitating limiting of the adjusting mechanism, the adjusting mechanism comprises three movable columns, three fastening threaded rods and a rotating disc, the limiting mechanism comprises a plug pin, and the number of the movable columns and the number of the fastening threaded rods are both three. The movable column, the first conical teeth and the second conical teeth are arranged to be matched, after the three ball rings are connected to the circumferential end of the pin shaft in a sleeving mode, the three fastening threaded rods can be driven to rotate at the same time for assembly by rotating the rotating disc under the cooperation of the second conical teeth and the first conical teeth, and the assembly efficiency is improved. And the assembly efficiency of the single universal joint is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of three-ball pin universal joints, and particularly relates to a three-ball pin universal joint convenient for assembly. Background Technique

[0002] The three-ball pin universal joint mainly consists of a three-pin frame, three ball rings and a housing, etc. There are three pin shafts distributed at a certain angle on the three-pin frame, and each pin shaft is equipped with a ball ring. The ball ring cooperates with the inner spherical surface of the housing to achieve constant velocity transmission.

[0003] At present, the existing three-ball pin universal joint (such as patent number: CN205154941U) discloses a three-ball pin universal joint convenient for assembly. This utility model uses this gap as a raceway, and there are several needle rollers that can roll around the axis of the pin shaft in the raceway. The outer end opening of the ball ring converges towards the axis of the pin shaft, and its diameter D2 is smaller than the diameter D1 of the circle where the axis trajectory of the needle roller is located when the needle roller rolls, so that there are fewer parts and it is convenient for assembly.

[0004] However, during the implementation of the above technical solution, it is found that there are at least the following technical problems: When the existing ball ring is assembled with the three-pin frame and the pin shaft, usually the ball rings need to be assembled one by one, and the fastening screw rods are tightened one by one, which takes a lot of time, resulting in low production efficiency and being unfavorable for some large-scale production work. Moreover, due to the one-by-one installation, there may be certain differences in the installation positions and states of each fastening screw rod, and it is difficult to ensure the consistency of the installation of the three fastening screw rods and the ball ring, which may affect the performance of the entire universal joint. Content of the Utility Model

[0005] (1) Technical Problems to be Solved

[0006] Aiming at the deficiencies of the prior art, the utility model provides a three-ball pin universal joint convenient for assembly, which solves the technical problems that when the existing ball ring is assembled with the three-pin frame and the pin shaft, usually the ball rings need to be assembled one by one, and the fastening screw rods are tightened one by one, which takes a lot of time, resulting in low production efficiency and being unfavorable for some large-scale production work. Moreover, due to the one-by-one installation, there may be certain differences in the installation positions and states of each fastening screw rod, and it is difficult to ensure the consistency of the installation of the three fastening screw rods and the ball ring, which may affect the performance of the entire universal joint.

[0007] (2) Technical Solutions

[0008] To achieve the above purposes, the utility model is realized through the following technical solutions:

[0009] A three-ball pin universal joint convenient for assembly, comprising a three-pin frame and a ball ring. Three pin shafts are arrayedly installed at the circumferential end of the three-pin frame. An adjusting mechanism for facilitating the rapid assembly of the ball ring is provided on the three-pin frame. A limiting mechanism for limiting the adjusting mechanism is provided on the three-pin frame. The adjusting mechanism includes a movable column, a fastening threaded rod, and a rotating disc. The limiting mechanism includes a pin. The number of the movable column and the fastening threaded rod is three each. Thread grooves are respectively formed through the side ends of the three pin shafts. The three movable columns are respectively rotatably installed on the inner side walls of the thread grooves. The three fastening threaded rods are respectively threadedly and rotatably installed on the inner side walls of the thread grooves. The rotating disc is located at the lower end of the three-pin frame. A second conical tooth is fixedly installed at the upper end of the rotating disc. A plurality of limiting grooves are arrayedly formed at the lower end of the three-pin frame. An installation groove is formed at the lower end of the three-pin frame. An annular rail is further formed at the lower end of the three-pin frame. The number of the ball rings is three. The three ball rings are respectively sleeved on the circumferential ends of the pin shafts. First conical teeth are fixedly installed at the circumferential ends of the three movable columns. The second conical tooth meshes with the three first conical teeth. Receiving columns are provided at the side ends of the three movable columns. Two slots are respectively formed at the side ends of the three receiving columns. First springs are fixedly installed between the three receiving columns and the three movable columns. Telescopic rods are further fixedly installed between the three receiving columns and the three movable columns. The three telescopic rods are respectively located on the inner side walls of the three first springs.

[0010] Preferably: Two insertion rods are fixedly installed at the side end of the fastening threaded rod. The size of each insertion rod is adapted to each slot. Each insertion rod is respectively slidably located on the inner side wall of each slot.

[0011] Preferably: A fixing ring is fixedly installed at the upper end of the rotating disc. The fixing ring is rotatably installed on the inner side wall of the annular rail. The pin is slidably installed through the inner side wall of the circular groove. The end of the pin is slidably installed on the inner side wall of the limiting groove. A second spring is fixedly installed between the pin and the rotating disc.

[0012] (III) Beneficial effects

[0013] 1. By setting the cooperation of the movable column, the first conical tooth and the second conical tooth, after the three ball rings are sleeved on the circumferential ends of the pin shafts, by rotating a rotating disc, under the cooperation of the second conical tooth and the first conical tooth, the three fastening threaded rods can be simultaneously driven to rotate for assembly, improving the assembly efficiency of a single universal joint, making the assembly convenient, and at the same time ensuring the consistency of the assembly.

[0014] 2. This device is provided with a limit mechanism. After each ball ring and fastening threaded rod are assembled, the fastening threaded rod can be limited by a pin that is clamped in the limit groove to avoid the phenomenon of fastening threaded rod loosening due to vibration and other reasons during subsequent use, thereby ensuring the stability of the entire universal joint during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings.

[0016] Figure 1 This is a structural diagram of the tripod stand of the utility model;

[0017] Figure 2 This is a structural diagram of the rotating disk of the utility model;

[0018] Figure 3 This is a structural diagram of the movable column of the utility model;

[0019] Figure 4 It is a schematic diagram of the exploded structure of the pin shaft of the utility model.

[0020] Legend: 1. Three-pin bracket; 11. Pin shaft; 12. Threaded groove; 13. Limiting groove; 14. Mounting groove; 15. Annular rail; 2. Ball ring; 3. Movable column; 31. First conical tooth; 32. First spring; 33. Supporting column; 34. Slot; 35. Telescopic rod; 4. Fastening threaded rod; 41. Insert rod; 5. Rotating disk; 51. Circular groove; 52. Second conical tooth; 53. Fixed ring; 6. Latch pin; 61. Second spring. DETAILED DESCRIPTION

[0021] The embodiment of the present application provides a three-ball and pin universal joint that is easy to assemble, and effectively solves the problem that when assembling the existing ball ring 2, the tripod frame 1, and the pin shaft 11, the ball ring 2 usually needs to be assembled one by one, and the fastening threaded rods 4 need to be tightened one by one, which takes a lot of time and leads to low production efficiency, which is not conducive to some large-scale production work. In addition, since the installation is performed one by one, there may be certain differences in the installation position and state of each fastening threaded rod 4, making it difficult to ensure the consistency of the installation of the three fastening threaded rods 4 and the ball ring 2, which may affect the technical problem of the performance of the entire universal joint. The device is provided with a movable column 3, a first conical tooth 31 and a second conical tooth 52, and after the three ball rings 2 are sleeved on the circumferential ends of the pin shaft 11, a rotating disk 5 can be rotated to simultaneously drive the three fastening threaded rods 4 to rotate for assembly under the cooperation of the second conical tooth 52 and the first conical tooth 31, thereby improving the assembly efficiency of a single universal joint, making the assembly convenient, and ensuring the consistency of the assembly.

[0022] Embodiment

[0023] The technical solution in the embodiment of the present application is to effectively solve the technical problem that when the existing ball ring 2 and the three-pin bracket 1 and the pin shaft 11 are assembled, it is usually necessary to assemble the ball ring 2 one by one and tighten the fastening threaded rods 4 one by one, which takes a lot of time, resulting in low production efficiency and being unfavorable for some large-scale production work. Moreover, due to the one-by-one installation, there may be certain differences in the installation positions and states of each fastening threaded rod 4, and it is difficult to ensure the consistency of the installation of the three fastening threaded rods 4 and the ball ring 2, which may affect the performance of the entire universal joint. The general idea is as follows: A three-ball pin universal joint that is convenient for assembly, including a three-pin bracket 1 and a ball ring 2. Three pin shafts 11 are arrayedly installed at the circumferential end of the three-pin bracket 1. An adjusting mechanism for facilitating the quick assembly of the ball ring 2 is provided on the three-pin bracket 1. A limiting mechanism for limiting the adjusting mechanism is provided on the three-pin bracket 1. The adjusting mechanism includes a movable column 3, a fastening threaded rod 4, and a rotating disk 5. The limiting mechanism includes a pin 6. The number of the movable column 3 and the fastening threaded rod 4 is three each. Threaded grooves 12 are respectively formed through the side ends of the three pin shafts 11. The three movable columns 3 are respectively rotatably installed on the inner side walls of the threaded grooves 12. The three fastening threaded rods 4 are respectively threadedly and rotatably installed on the inner side walls of the threaded grooves 12. The rotating disk 5 is located at the lower end of the three-pin bracket 1. A second bevel gear 52 is fixedly installed at the upper end of the rotating disk 5. A plurality of limiting grooves 13 are arrayedly formed at the lower end of the three-pin bracket 1. An installation groove 14 is formed at the lower end of the three-pin bracket 1. An annular track 15 is further formed at the lower end of the three-pin bracket 1. The number of the ball rings 2 is three. The three ball rings 2 are respectively sleeved on the circumferential ends of the pin shafts 11. When the user assembles each ball ring 2 on the circumferential end of the pin shaft 11, the three ball rings 2 can be respectively sleeved on the circumferential ends of the pin shafts 11;

[0024] First bevel gears 31 are fixedly installed at the circumferential ends of the three movable columns 3. The second bevel gear 52 meshes with the three first bevel gears 31. Receiving columns 33 are provided at the side ends of the three movable columns 3. Two slots 34 are respectively formed at the side ends of the three receiving columns 33. First springs 32 are fixedly installed between the three receiving columns 33 and the three movable columns 3. Expansion rods 35 are also fixedly installed between the three receiving columns 33 and the three movable columns 3. The three expansion rods 35 are all located on the inner side walls of the three first springs 32. The user can rotate the rotating disk 5. The rotation of the rotating disk 5 drives the second bevel gear 52 to rotate. The rotation of the second bevel gear 52 will synchronously drive the three first bevel gears 31 to rotate. The rotation of the three first bevel gears 31 will simultaneously drive the movable column 3 to rotate. The rotation of the movable column 3 will drive the receiving column 33 to rotate through the first spring 32 and the expansion rod 35. The rotation of the receiving column 33 will drive the insertion rod 41 to rotate through the slot 34;

[0025] Two insertion rods 41 are fixedly installed at the side end of the fastening threaded rod 4. The size of each insertion rod 41 is adapted to each slot 34. Each insertion rod 41 is respectively slidably located on the inner side wall of each slot 34. The rotation of the insertion rod 41 will drive the three fastening threaded rods 4 to rotate simultaneously. The thread on the fastening threaded rod 4 is adapted to the thread groove 12. During the rotation of the fastening threaded rod 4, it will gradually slide into the interior of the thread groove 12. At this time, the receiving column 33 will be stressed and slide in the thread groove 12, and the first spring 32 and the telescopic rod 35 will be compressed. When the three fastening threaded rods 4 move to the appropriate assembly position, the limit assembly of the ball ring 2 is completed;

[0026] A fixed ring 53 is fixedly installed at the upper end of the rotating disc 5. The fixed ring 53 is rotatably installed on the inner side wall of the annular rail 15. The insertion pin 6 is slidably installed through the inner side wall of the circular groove 51. The end of the insertion pin 6 is slidably installed on the inner side wall of the limit groove 13. A second spring 61 is fixedly installed between the insertion pin 6 and the rotating disc 5. Insert the insertion rods 41 at the side ends of the three fastening threaded rods 4 into each slot 34 to complete the initial fixation of each fastening threaded rod 4. At this time, the user can pull the insertion pin 6 downward. When the insertion pin 6 moves downward, the second spring 61 is stretched. When the insertion pin 6 slides out of the inner side wall of the limit groove 13, the rotating disc 5 is no longer limited.

[0027] Aiming at the problems existing in the prior art, the utility model provides a three-ball pin universal joint which is convenient for assembly. By setting the movable column 3, the first bevel gear 31 and the second bevel gear 52 to cooperate, after the three ball rings 2 are sleeved on the circumferential end of the pin shaft 11, by rotating a rotating disc 5, under the cooperation of the second bevel gear 52 and the first bevel gear 31, the three fastening threaded rods 4 can be driven to rotate simultaneously for assembly, improving the assembly efficiency of a single universal joint, making the assembly convenient, and at the same time ensuring the consistency of the assembly.

[0028] Working principle:

[0029] When the user assembles each ball ring 2 at the circumferential end of the pin shaft 11, the three ball rings 2 can be respectively sleeved on the circumferential end of the pin shaft 11, and the insertion rods 41 at the side ends of the three fastening threaded rods 4 are inserted into each slot 34 to complete the initial fixation of each fastening threaded rod 4. At this time, the user can pull the bolt 6 downward. When the bolt 6 moves downward, the second spring 61 is stretched. When the bolt 6 slides away from the inner wall of the limit groove 13, the rotating disk 5 is no longer limited, and the user can rotate the rotating disk 5. When the rotating disk 5 rotates, it drives the second bevel gear 52 to rotate. When the second bevel gear 52 rotates, it will synchronously drive the three first bevel gears 31 to rotate. When the three first bevel gears 31 rotate, they will simultaneously drive the movable column 3 to rotate. When the movable column 3 rotates, it will drive the receiving column 33 to rotate through the first spring 32 and the telescopic rod 35. When the receiving column 33 rotates, it will drive the insertion rod 41 to rotate through the slot 34. When the insertion rod 41 rotates, it will drive the three fastening threaded rods 4 to rotate simultaneously. The threads on the fastening threaded rods 4 are adapted to the thread grooves 12. During the rotation of the fastening threaded rods 4, they will gradually slide into the interior of the thread grooves 12. At this time, the receiving column 33 will slide in the thread groove 12 under force, and the first spring 32 and the telescopic rod 35 are compressed. When the three fastening threaded rods 4 move to the appropriate assembly position, the limit assembly of the ball ring 2 is completed. At this time, the user can stop rotating the rotating disk 5 and release the bolt 6. The second spring 61 will rebound and drive the bolt 6 to be inserted into the limit groove 13 at the lower end of the three-pin bracket 1 again, completing the rapid assembly of the ball ring 2. When assembling the existing ball ring 2, three-pin bracket 1 and pin shaft 11, usually each ball ring 2 needs to be assembled one by one, and each fastening threaded rod 4 needs to be tightened one by one, which takes a lot of time, resulting in low production efficiency and being not conducive to some large-scale production work. Moreover, due to the individual installation, there may be certain differences in the installation positions and states of each fastening threaded rod 4, making it difficult to ensure the consistency of the installation of the three fastening threaded rods 4 and the ball ring 2, which may affect the performance of the entire universal joint. By setting the cooperation of the movable column 3, the first bevel gear 31 and the second bevel gear 52, after the three ball rings 2 are sleeved on the circumferential end of the pin shaft 11, by rotating a rotating disk 5, under the cooperation of the second bevel gear 52 and the first bevel gear 31, the three fastening threaded rods 4 can be driven to rotate simultaneously for assembly, improving the assembly efficiency of a single universal joint, making the assembly convenient, and at the same time ensuring the consistency of the assembly. And by setting a limit mechanism, after the assembly of each ball ring 2 and the fastening threaded rod 4 is completed, the fastening threaded rod 4 can also be limited by the bolt 6 being clamped in the limit groove 13, avoiding the phenomenon that the fastening threaded rod 4 may become loose due to vibration or other reasons during subsequent use, and ensuring the stability of the entire universal joint during use.

[0030] Finally, it should be noted that: Obviously, the above embodiments are merely examples given to clearly illustrate the present utility model, rather than limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation manners here. And the obvious changes or modifications derived therefrom still fall within the protection scope of the present utility model.

Claims

1. A tripod universal joint that is easy to assemble, comprising a tripod bracket (1) and a ball ring (2), wherein three pins (11) are mounted in an array at the circumferential end of the tripod bracket (1), characterized in that: The tripod bracket (1) is provided with an adjustment mechanism for facilitating quick assembly of the ball ring (2), and the tripod bracket (1) is provided with a limiting mechanism for facilitating limiting the position of the adjustment mechanism; The adjusting mechanism comprises a movable column (3), a fastening threaded rod (4) and a rotating disk (5), the limiting mechanism comprises a latch (6), the movable column (3) and the fastening threaded rod (4) are each three in number, the side ends of the three pin shafts (11) are each penetrated with a threaded groove (12), the three movable columns (3) are respectively rotatably mounted on the inner side walls of the threaded groove (12), the three fastening threaded rods (4) are respectively threadedly rotatably mounted on the inner side walls of the threaded groove (12), the rotating disk (5) is located at the lower end of the tripod frame (1), and the upper end of the rotating disk (5) is fixedly mounted with a second conical tooth (52).

2. A tripod universal joint that is easy to assemble as claimed in claim 1, characterized in that: The lower end of the three-pin frame (1) is provided with a plurality of limit slots (13) in an array, the lower end of the three-pin frame (1) is provided with a mounting slot (14), and the lower end of the three-pin frame (1) is also provided with a ring rail (15).

3. A tripod universal joint that is easy to assemble as claimed in claim 2, characterized in that: The number of the ball rings (2) is three, and the three ball rings (2) are respectively sleeved on the circumferential ends of the pin shaft (11).

4. A tripod universal joint that is easy to assemble as claimed in claim 3, characterized in that: The circumferential ends of the three movable columns (3) are all fixedly mounted with first conical teeth (31), the second conical teeth (52) and the three first conical teeth (31) are all meshed with each other, the side ends of the three movable columns (3) are all provided with receiving columns (33), and the side ends of the three receiving columns (33) are all provided with two slots (34); A first spring (32) is fixedly installed between the three receiving columns (33) and the three movable columns (3), and a telescopic rod (35) is also fixedly installed between the three receiving columns (33) and the three movable columns (3), and the three telescopic rods (35) are all located on the inner side walls of the three first springs (32).

5. A tripod universal joint that is easy to assemble as claimed in claim 4, characterized in that: Two insertion rods (41) are fixedly mounted on the side ends of the fastening threaded rod (4), and the size of each insertion rod (41) is adapted to each slot (34); Wherein, each of the insertion rods (41) is slidably located on the inner side wall of each slot (34).

6. A tripod universal joint that is easy to assemble as claimed in claim 5, characterized in that: A fixing ring (53) is fixedly mounted on the upper end of the rotating disk (5), and the fixing ring (53) is rotatably mounted on the inner side wall of the annular rail (15). The latch (6) penetrates and is slidably mounted on the inner side wall of the circular groove (51), and the end of the latch (6) is slidably mounted on the inner side wall of the limiting groove (13); Wherein, a second spring (61) is fixedly installed between the latch (6) and the rotating disk (5).

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