Cross-shaped special-shaped mandrel

Abstract

The utility model discloses a cross-shaped special-shaped mandrel which comprises a middle block, four side faces of the middle block are respectively provided with a mandrel, an outer cylinder body is installed outside the circumference of each mandrel, one end of each mandrel is provided with an integrated connecting portion, the connecting portion and the middle block are of an integrated structure, and a matched opening is formed in the position, corresponding to the connecting portion, of one end of each outer cylinder body. A second thread is arranged at the end, close to the connecting part, of the shaft core, an inner thread matched with the second thread is arranged in the outer barrel, a first thread is arranged at the end, away from the connecting part, of the shaft core, and a locking nut is in threaded connection with the first thread. When a certain outer barrel body is seriously abraded or broken, the damaged outer barrel body is rotated to be separated from the shaft core, a new outer barrel body is installed, and the waste phenomenon caused by the fact that the whole device is discarded is avoided. According to the utility model, the locking nut is arranged, and the locking nut can further lock the outer cylinder body on the shaft core, so that the outer cylinder body is prevented from falling off.

Description

Technical Field

[0001] The utility model relates to the technical field of cross shafts, in particular to a cross-shaped mandrel. Background Art

[0002] The cross shaft refers to the universal joint, which is a universal joint. It is used in places where the direction of the transmission axis needs to be changed. It is the "joint" component of the universal transmission device of the automobile drive system. The combination of the universal joint and the transmission shaft is called a universal joint transmission device. In front-engine rear-wheel drive vehicles, the universal joint transmission device is installed between the transmission output shaft and the input shaft of the drive axle final reducer; while the front-engine front-wheel drive vehicle omits the transmission shaft, and the universal joint is installed between the front axle half shaft and the wheel, which is responsible for both driving and steering;

[0003] In the prior art, since the forces between the driving shaft and the driven shaft are not in the same straight line, the wear degree of each shaft is different. Once one of the shafts is worn or broken, the entire cross shaft needs to be replaced, resulting in waste. Utility Model Content

[0004] The utility model aims to provide a cross-shaped core shaft to solve the problem in the prior art that the forces between the driving shaft and the driven shaft are not in the same straight line, so the wear degree of each shaft is different. Once one of the shafts is worn or broken, the entire cross shaft needs to be replaced, resulting in waste.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a cross-shaped mandrel, comprising a middle block, wherein the four sides of the middle block are provided with an axis core, and an outer cylinder is installed outside the circumference of the axis core.

[0006] Preferably, one end of the shaft core is provided with an integrated connecting portion, the connecting portion and the middle block are an integral structure, and one end of the outer cylinder is provided with a matching opening at a position corresponding to the connecting portion.

[0007] Preferably, one end of the shaft core close to the connecting portion is provided with a second thread, and the interior of the outer cylinder is provided with an internal thread matching the second thread.

[0008] Preferably, a first thread is provided at one end of the shaft core away from the connecting portion, the first thread protrudes from the outer cylinder, and a locking nut is threadedly connected to the first thread.

[0009] Preferably, a serration portion is provided on the circumferential outer surface of the locking nut.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] 1. When a certain outer cylinder is seriously worn or broken, the damaged outer cylinder can be rotated to separate it from the shaft core and a new outer cylinder can be installed, thus avoiding the waste caused by the overall discarding of the device.

[0012] 2. A locking nut is provided in the utility model, and the locking nut can further lock the outer cylinder on the shaft core to prevent the outer cylinder from falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is an exploded view of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the outer cylinder of the utility model.

[0017] In the figure: 1, middle block; 2, outer cylinder; 21, matching opening; 22, internal thread; 3, shaft core; 31, first thread; 32, second thread; 33, connecting part; 4, locking nut. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1 As shown, in the embodiment of the utility model, a cross-shaped mandrel includes a middle block 1, and the four sides of the middle block 1 are provided with an axis core 3, and an outer cylinder 2 is installed on the circumference of the axis core 3. When the device is used, the bearing seat of the universal joint is installed on the outside of the outer cylinder 2. When the device is used for a long time, when the outer cylinder 2 is severely worn or broken, the outer cylinder 2 is disassembled and a new outer cylinder 2 is set on the axis core 3 for reuse, avoiding the waste caused by the overall disposal of the device;

[0020] Combination Figure 1 and Figure 2As shown, in order to connect the shaft core 3 with the middle block 1, an integrated connecting portion 33 is provided at one end of the shaft core 3. The connecting portion 33 and the middle block 1 are an integrated structure. The connecting portion 33 can increase the contact area between the shaft core 3 and the middle block 1, making the connection more firm and tight. Preferably, a matching opening 21 is opened at a position corresponding to the connecting portion 33 at one end of the outer cylinder 2 to ensure that the outer cylinder 2 and the shaft core 3 are fully adapted;

[0021] Reference Figure 2 and Figure 3 As shown, a second thread 32 is provided at one end of the shaft core 3 near the connecting portion 33, and an internal thread 22 matching the second thread 32 is provided inside the outer cylinder 2, thereby achieving mutual fixation between the outer cylinder 2 and the shaft core 3. When the outer cylinder 2 needs to be disassembled, it only needs to be disassembled through the thread, which is convenient for disassembly and assembly;

[0022] Continue to refer to Figure 2 In order to further lock the outer cylinder 2 and prevent it from falling off, a first thread 31 is provided at the end of the shaft core 3 away from the connecting portion 33. The first thread 31 protrudes from the outer cylinder 2, and a locking nut 4 is threadedly connected to the first thread 31, so that the locking nut 4 can further prevent the outer cylinder 2 from falling off the shaft core 3. Preferably, the thread directions of the first thread 31 and the second thread 32 are opposite, so that locking can be further achieved. The circumferential outer surface of the locking nut 4 is provided with a serrated portion to facilitate the rotation operation of the locking nut 4.

[0023] The working principle and use process of the utility model: When using this device, Figure 1 In the state shown, the two bearing seats of the universal joint are installed on the outer cylinder 2. When the device is used for a long time and one of the outer cylinders 2 is severely worn or broken, the locking nut 4 is first removed by rotating the corresponding locking nut 4, and then the damaged outer cylinder 2 is rotated again to separate it from the shaft core 3, and a new outer cylinder 2 is installed, thereby avoiding the waste caused by the overall disposal of the device.

[0024] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A cross-shaped mandrel, comprising a middle block (1), characterized in that: The four sides of the middle block (1) are each provided with an axis core (3), and the outer cylinder (2) is installed outside the circumference of the axis core (3); One end of the shaft core (3) is provided with an integral connecting portion (33), the connecting portion (33) and the middle block (1) are an integral structure, and one end of the outer cylinder (2) is provided with a matching opening (21) at a position corresponding to the connecting portion (33); The shaft core (3) has an end close to the connecting portion (33) provided with a second thread (32), and the outer cylinder (2) has an inner thread (22) matched with the second thread (32) provided inside.

2. The cross-shaped mandrel according to claim 1, characterized in that: A first thread (31) is provided at one end of the shaft core (3) away from the connecting portion (33), the first thread (31) protrudes from the outer cylinder (2), and a locking nut (4) is threadedly connected to the first thread (31).

3. The cross-shaped mandrel according to claim 2, characterized in that: The outer circumferential surface of the locking nut (4) is provided with a serration portion.

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