Center fork for mounting cross shaft

Abstract

The utility model discloses a center fork for installing a cross axle, which relates to the technical field of automobile universal joints, and comprises a center fork main body detachably connected with a transmission shaft, one end of the center fork main body is provided with an accommodating groove for inserting the transmission shaft, and the inner side wall of the accommodating groove is provided with a plurality of clamping blocks. The transmission shaft is located among the multiple clamping blocks, and a driving piece is arranged on the center fork body and used for driving the multiple clamping blocks to be close to or away from each other at the same time so that a clamping area formed by the multiple clamping blocks close to each other can wrap and clamp the transmission shaft. According to the center fork, the driving piece and the clamping blocks are arranged, after the transmission shaft is inserted into the containing groove in the center fork body, the driving piece can drive the clamping blocks to move close to one another at the same time, and then the transmission shaft can be wrapped and clamped through the clamping area formed by the clamping blocks close to one another; quick fixed connection between the center fork body and the transmission shaft is achieved, and operation is easy and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile universal joints, in particular to a center fork used for installing a cross shaft. Background Art

[0002] The center fork is also called the universal joint fork. It is one of the key parts in the transmission shaft system of automobiles and tractors. It is a part that realizes variable-angle power transmission and is used in the position where the direction of the transmission axis needs to be changed. It is the "joint" part of the universal transmission device of the automobile drive system. The combination of the center fork and the transmission shaft is called a universal transmission device.

[0003] In actual use, the connection between the center fork and the transmission shaft may become loose and fall off after long-term use. Generally, the staff will use bolts to lock the two together. Figure 1 As shown, 101 is a center fork, 103 is a cross shaft for connecting two center forks 101, 102 is a transmission shaft connected to one of the center forks 101, and 104 is a fastening bolt 104 that locks the center fork and the transmission shaft.

[0004] For example, the patent document with authorization announcement number CN212106675U discloses a bidirectional limiting anti-loosening universal joint fork, which includes a universal joint fork body and a transmission shaft, a spline is arranged at the end of the transmission shaft, a spline groove is arranged inside the through hole of the universal joint fork body, the transmission shaft and the universal joint fork body are axially connected through the splines and spline grooves that cooperate with each other, a locking gap is arranged on the side of the universal joint fork body, locking blocks are arranged on both sides of the locking gap, locking screw holes are arranged on the locking blocks, and locking bolts are arranged in the locking screw holes, fork ears are arranged on both sides of the end of the universal joint fork body, and a cross shaft mounting hole is arranged on the fork ears, a limiting hole is arranged on the side of the universal joint fork body, a limiting pin is inserted in the limiting hole, and an annular limiting groove is arranged on the spline of the transmission shaft, the limiting groove divides the spline into two parts, and the limiting pin is clamped in the limiting groove.

[0005] The above-mentioned universal joint fork realizes the fixed connection between the universal joint fork body and the transmission shaft by providing splines and spline grooves on the basis of the fastening bolts. However, since the above-mentioned two locking arrangements require the provision of multiple circumferentially arranged locking bolts, the disassembly and assembly of the locking bolts is relatively complicated and tedious, requiring the staff to invest more time, resulting in low disassembly and assembly efficiency.

[0006] Therefore, we propose a center fork for cross-axle installation to solve the problems in the prior art. Utility Model Content

[0007] In order to overcome the shortcomings of the prior art, the utility model provides a center fork for cross-axis installation. During the process of connecting the center fork with the transmission shaft, the cooperation of the provided drive ring and multiple clamping blocks can drive a single drive ring to achieve clamping and fixing of the transmission shaft by multiple clamping blocks. The operation is convenient and easy to use.

[0008] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0009] A center fork for cross-axis installation comprises a center fork main body for detachably connecting to a transmission shaft, a receiving groove for inserting the transmission shaft is provided at one end of the center fork main body, and a plurality of clamping blocks are provided on the inner side wall of the receiving groove, the transmission shaft is located between the plurality of clamping blocks, a driving member is provided on the center fork main body, and the driving member is used to drive the plurality of clamping blocks to approach or move away from each other at the same time, so that the clamping area formed by the plurality of clamping blocks approaching each other can wrap and clamp the transmission shaft.

[0010] As a preferred technical solution of the utility model, the driving member includes a driving ring movable on the center fork body, and a connecting block with one end extending out of the accommodating groove is fixedly provided on the clamping block, and the connecting block is wedge-matched with the driving ring.

[0011] As a preferred technical solution of the utility model, the end of the connecting block located outside the accommodating groove is provided with a slope facing the driving ring, and the driving ring cooperates with the sloped wedge so that the movement of the driving ring on the center fork body can drive the clamping block to move radially along the accommodating groove.

[0012] As a preferred technical solution of the utility model, the inner side wall of the accommodating groove is provided with a spline groove, and one end of the transmission shaft located in the accommodating groove is provided with a spline matched with the spline groove.

[0013] As a preferred technical solution of the utility model, resistance rubber is arranged on one side of the plurality of clamping blocks close to each other.

[0014] As a preferred technical solution of the utility model, a limiting groove is provided on the side wall of the accommodating groove opposite to the transmission shaft, and the size of the limiting groove is matched with the size of the end of the transmission shaft.

[0015] As a preferred technical solution of the utility model, the drive ring is threadedly sleeved on the outside of the center fork body.

[0016] As a preferred technical solution of the present utility model, a plurality of the clamping blocks are arranged in a circumferential array.

[0017] Compared with the prior art, the utility model can achieve the following beneficial effects:

[0018] 1. By setting a driving member and a plurality of clamping blocks, after the transmission shaft is inserted into the receiving groove on the center fork body, the driving member can be used to simultaneously drive the plurality of clamping blocks to move closer to each other, and then the clamping area formed by the plurality of clamping blocks can wrap and clamp the transmission shaft, thereby realizing a quick and fixed connection between the center fork body and the transmission shaft, and the operation is simple.

[0019] 2. By setting resistance rubber, etc., the friction force between the clamping block and the transmission shaft can be increased by using the resistance rubber, so as to ensure stable transmission between the center fork body and the transmission shaft.

[0020] 3. By setting the limit groove, the transmission shaft can be kept coaxial with the receiving groove during the process of being inserted into the receiving groove until it is fully inserted, thereby improving the stability and accuracy of the assembly and installation between the center fork body and the transmission shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the center fork and the transmission shaft in the prior art;

[0022] Figure 2 It is a partial structural schematic diagram of the first embodiment of the utility model;

[0023] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0024] Figure 4 This is a front view structural diagram of the first embodiment of the utility model;

[0025] Figure 5 This is a schematic diagram of the local structure of the second embodiment of the present utility model. Figure 1 ;

[0026] Figure 6 This is a schematic diagram of the local structure of the second embodiment of the present utility model. Figure 2 .

[0027] Among them: 1. Center fork body; 2. Transmission shaft; 3. Accommodating groove; 4. Clamping block; 5. Driving ring; 6. Connecting block; 7. Inclined surface; 8. Spline groove; 9. Spline; 10. Resistance rubber; 11. Limiting groove. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, purpose and efficacy of the utility model easy to understand, the utility model is further described below in conjunction with specific embodiments, but the following embodiments are only preferred embodiments of the utility model, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the utility model. The experimental methods in the following embodiments are conventional methods unless otherwise specified, and the materials, reagents, etc. used in the following embodiments are all commercially available unless otherwise specified.

[0029] Embodiment one:

[0030] like Figure 2-Figure 4 As shown, the utility model provides a center fork for cross-axis installation, including a center fork body 1 for detachably connecting with a transmission shaft 2, and a receiving groove 3 for inserting the transmission shaft 2 is opened at one end of the center fork body 1. Preferably, the shape of the receiving groove 3 is set to be circular. At the same time, a plurality of clamping blocks 4 are arranged on the inner side wall of the receiving groove 3. When the transmission shaft 2 is inserted into the receiving groove 3, the transmission shaft 2 is located between the plurality of clamping blocks 4. A driving member is arranged on the center fork body 1, and the driving member is used to drive the plurality of clamping blocks 4 to move toward or away from each other at the same time. When the driving member drives the plurality of clamping blocks 4 to move toward each other, the clamping area formed by the plurality of clamping blocks 4 approaching each other wraps and clamps the transmission shaft 2, that is, the connection and locking of the plurality of clamping blocks 4 to the transmission shaft 2 is realized to ensure the subsequent transmission.

[0031] The utility model sets a driving member and a plurality of clamping blocks 4 that cooperate with each other. Before the transmission shaft 2 is inserted into the accommodating groove 3, the plurality of clamping blocks 4 are in a state of being away from each other, that is, in a free state. Then, the transmission shaft 2 can be inserted between the plurality of clamping blocks 4, and then the driving member is driven to move on the center fork body 1, so that the plurality of clamping blocks 4 move closer to each other inside the accommodating groove 3, thereby clamping and locking the transmission shaft 2.

[0032] It should be noted that in order to ensure that the multiple clamping blocks 4 are in a state of being away from each other in the initial state, elastic parts such as springs can be provided so that the springs exert a certain force on the clamping blocks 4 to drive the multiple clamping blocks 4 away from each other; this is a conventional technical means in the prior art, and in order to avoid cumbersome writing, it will not be repeated here. Alternatively, when the transmission shaft 2 is inserted into the receiving groove 3, the clamping block 4 located above can be lifted upward to ensure that the multiple clamping blocks 4 are in a state of being away from each other.

[0033] Regarding the arrangement of the driving member mentioned above, the driving member includes a driving ring 5 that moves on the center fork body 1, and preferably, the driving ring 5 is threadedly sleeved on the outside of the center fork body 1. A connecting block 6 with one end extending out of the receiving groove 3 is fixedly provided on the clamping block 4, and the connecting block 6 is wedge-matched with the driving ring 5. Furthermore, an inclined surface 7 facing the driving ring 5 is formed at one end of the connecting block 6 located outside the receiving groove 3, and the driving ring 5 is wedge-matched with the inclined surface 7, so that the movement of the driving ring 5 on the center fork body 1 can drive the clamping block 4 to move radially along the receiving groove 3. Figure 2 In the state shown, the driving ring 5 is driven from left to right to move, and then the driving ring 5 can be pressed against the driving inclined surface 7, which will cause the connecting block 6 to drive the clamping block 4 to move along the radial direction of the receiving groove 3, that is, the multiple clamping blocks 4 will approach each other until the multiple clamping blocks 4 clamp and wrap the end of the transmission shaft 2. Further, a resistance rubber 10 can also be provided on the side where the multiple clamping blocks 4 are close to each other, and the friction force between the clamping block 4 and the transmission shaft 2 can be increased by using the resistance rubber 10.

[0034] In order to prevent good pre-assembly between the center fork body 1 and the transmission shaft 2, a spline groove 8 can be provided on the inner wall of the accommodating groove 3, and a spline 9 matched with the spline groove 8 is provided at one end of the transmission shaft 2 located in the accommodating groove 3.

[0035] Embodiment two:

[0036] like Figure 5-Figure 6 As shown, the difference between this embodiment and the first embodiment is that a limiting groove 11 is provided on the side wall of the receiving groove 3 opposite to the transmission shaft 2, and the size of the limiting groove 11 is adapted to the size of the end of the transmission shaft 2. By setting the limiting groove 11, the transmission shaft 2 can be kept coaxial with the receiving groove 3 during the process of inserting the transmission shaft 2 into the receiving groove 3 until it is fully inserted, thereby improving the stability and accuracy of the assembly and installation between the center fork body 1 and the transmission shaft 2.

[0037] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A center fork for mounting a cross shaft, characterized in that: The invention comprises a central fork body (1) for being detachably connected to a transmission shaft (2), wherein one end of the central fork body (1) is provided with a receiving groove (3) for inserting the transmission shaft (2), and a plurality of clamping blocks (4) are arranged on the inner side wall of the receiving groove (3), and the transmission shaft (2) is located between the plurality of clamping blocks (4). A driving member is arranged on the central fork body (1), and the driving member is used to drive the plurality of clamping blocks (4) to move closer to or farther from each other at the same time, so that the clamping area formed by the plurality of clamping blocks (4) approaching each other wraps and clamps the transmission shaft (2).

2. The center fork for mounting a cross shaft according to claim 1, characterized in that: The driving member comprises a driving ring (5) movable on the central fork body (1), and a connecting block (6) having one end extending out of the receiving groove (3) is fixedly provided on the clamping block (4), and the connecting block (6) is wedge-matched with the driving ring (5).

3. The center fork for mounting a cross shaft according to claim 2, characterized in that: An end of the connecting block (6) located outside the receiving groove (3) is provided with an inclined surface (7) facing the driving ring (5), and the driving ring (5) and the inclined surface (7) are wedge-matched, so that the movement of the driving ring (5) on the center fork body (1) can drive the clamping block (4) to move radially along the receiving groove (3).

4. The center fork for mounting a cross shaft according to any one of claims 1 to 3, characterized in that: The inner side wall of the receiving groove (3) is provided with a spline groove (8), and one end of the transmission shaft (2) located in the receiving groove (3) is provided with a spline (9) matched with the spline groove (8).

5. The center fork for mounting a cross shaft according to claim 4, characterized in that: Resistance rubber (10) is provided on each side of the plurality of clamping blocks (4) that are close to each other.

6. The center fork for mounting a cross shaft according to claim 5, characterized in that: A limiting groove (11) is provided on the side wall of the accommodating groove (3) opposite to the transmission shaft (2), and the size of the limiting groove (11) is adapted to the size of the end of the transmission shaft (2).

7. The center fork for mounting a cross shaft according to claim 2 or 3, characterized in that: The drive ring (5) is threadedly sleeved on the outside of the center fork body (1).

8. The center fork for mounting a cross shaft according to claim 1, characterized in that: A plurality of the clamping blocks (4) are arranged in a circumferential array.

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