CN213393214U

CN213393214U - Universal transmission structure

Info

Publication number: CN213393214U
Application number: CN202022213554.3U
Authority: CN
Inventors: 罗志强; 罗桂兰
Original assignee: Dongtai Gangshun Stainless Steel Products Co ltd
Current assignee: Dongtai Gangshun Stainless Steel Products Co ltd
Priority date: 2020-10-08
Filing date: 2020-10-08
Publication date: 2021-06-08
Anticipated expiration: 2030-10-08

Abstract

The utility model relates to a shaft coupling technical field especially relates to an universal drive structure, including the cross of two universal joint forks and two universal joint forks of hookup, the cross includes two mutually perpendicular's sharp axle, its characterized in that, and the universal joint fork is split type structure, including the fork body that two laminatings set up, be equipped with the flange on the fork body, be equipped with the mounting hole on the flange, the spindle nose of cross is pegged graft in the mounting hole, and locking structure is used for two fork body locking locks. The technical problem that the existing cross shaft is inconvenient to replace is solved.

Description

Universal transmission structure

Technical Field

The utility model belongs to the technical field of the shaft coupling, especially, relate to an universal drive structure that bent axle transmission used.

Background

The universal joint is a universal mechanical transmission part for transmitting motion and torque, and is suitable for two crossed shafts with certain deflection of the connecting axis and constantly changing relative positions. The universal joint is widely applied to transmission systems of automobiles and mechanical equipment, two joint forks of the cross universal joint are respectively connected with a driving shaft and a driven shaft of two intersecting shafts in the working process, and due to the fact that the instantaneous transmission ratios of the driving shaft and the driven shaft are different, the working stability of the cross universal joint can be influenced, impact load is generated on the universal joint, and the phenomena that the cross shaft is damaged, the joint forks are partially abraded and the like can be caused. The universal joint is compact in overall structure, the cross shaft at the joint part belongs to a vulnerable part, and the cross shaft is completely wrapped between flanges of the yoke, so that once the cross shaft is damaged, the replacement process is very laborious.

Chinese patent document (publication No. CN 201547151U) discloses a universal coupling, which at least includes two single universal couplings, wherein the end of one single universal coupling is a coupling shaft, the end of the other single universal coupling is a shaft sleeve, the cross section of the coupling shaft matches with the shape and size of the cross section of the inner cavity of the shaft sleeve, the coupling shaft is inserted in the shaft sleeve, and the two single universal couplings are coupled with the shaft sleeve outside the coupling shaft through the coupling shaft. The universal coupling is particularly suitable for the connection of low-speed and heavy-load transmission shafts under severe working environments, and has the advantages of simple and environment-friendly manufacturing process and low cost.

The utility model discloses it is the same with most cross universal joints on the market: 4 sleeves are arranged on the shaft heads of the cross shaft, are compactly and firmly sleeved on the 4 shaft heads of the cross shaft, and fix the cross shaft on the flange of the yoke. When the cross shaft has a problem and needs to be replaced, 4 sleeves need to be detached from the yoke, and then the cross shaft can be detached from the yoke. Such sleeves are cumbersome to disassemble, requiring the yoke to be placed on a special table and then tools to sequentially tap the two sleeves on the same axis from the outside of the yoke to the inside. Limited by the design defects of the structure, the sleeve can be slowly separated from the shaft head of the cross shaft only by knocking back and forth for several times, then the sleeve is taken down twice, and finally the cross shaft can be dismounted. Likewise, when a new cross shaft and a new shaft sleeve are installed, a tool is required to strongly knock the sleeve, so that the sleeve is embedded into the through hole of the yoke from the outer side of the universal joint, and the cross shaft is fixed in the through hole of the yoke. The knocking process is very laborious in the process of replacing the cross shaft, so that the working difficulty and the workload of workers are increased.

Disclosure of Invention

In order to solve the technical problem, the utility model provides an universal transmission structure convenient to change and constitute spare part.

The technical scheme adopted for solving the technical problems is as follows: the utility model provides a universal drive structure, includes two universal joint forks and the cross of hookup two universal joint forks, and the cross includes two mutually perpendicular's sharp axle, and its characterized in that, universal joint fork are split type structure, including the fork body that two laminating set up, are equipped with the flange on the fork body, are equipped with the mounting hole on the flange, and the spindle nose setting of cross is in the mounting hole, and locking structure is used for two fork body locking locks.

The utility model discloses a festival fork is split type, can be with its synthetic complete festival fork through a locking structure, and its structure does not have the difference with the festival fork of current cross universal joint with the function. And 4 spindle noses of cross can joint respectively in 4 mounting holes of two sets of forks, and the cross only can pass the mounting hole and can move about in the mounting hole, and the central point of cross can not pass the mounting hole. Through setting up the yoke into split type, when the cross goes wrong and needs to be changed, only need open locking structure, two yoke bodies just lose the constraint, then break off the yoke off with the fingers and thumb from keeping away from flange one side, the spindle nose of cross alright follow the mounting hole of yoke and withdraw from, then alright light take out the cross. When a new cross shaft is replaced, the shaft heads of the cross shaft are inserted into the corresponding mounting holes respectively, then the two pairs of fork bodies are folded, the contact surfaces of the two pairs of fork bodies are attached to each other, and the two fork bodies limit the cross shaft, so that the mounting purpose is achieved. Finally, one end of the joint fork consisting of the fork body is locked, and the utility model discloses just install and finish.

Furthermore, the locking structure is a shaft sleeve, and one end of the fork body, which is far away from the flange, is inserted in an inner cavity of the shaft sleeve. The shaft sleeve can fix the joint fork inserted in the shaft sleeve, and the phenomenon of position deviation of the two fork bodies due to vibration is prevented.

Furthermore, the locking structure is a shaft sleeve, the universal joint fork is cylindrical, and threads matched with each other are arranged on the outer peripheral surface of one end, far away from the flange, of the universal joint fork and the inner wall surface of the inner cavity of the shaft sleeve. The shaft sleeve can be conveniently disassembled and assembled by adopting threaded connection, and the device is very convenient and labor-saving. Meanwhile, the stability of the threaded connection is good, and the working stability of the yoke can be ensured.

Furthermore, the locking structure is a bolt, the fork bodies are provided with bolt holes, and the bolt penetrates through the bolt holes to be matched with the nut to lock and buckle the two fork bodies. When the yoke is disassembled and assembled, only the bolt needs to be loosened and screwed, and meanwhile, the connection performance of bolt connection is good.

Further, a sleeve is slidably disposed on one end of the spline shaft, a key groove is formed in the sleeve to engage with the spline shaft, and another sleeve is slidably disposed on the other end of the spline shaft. In devices using a universal joint transmission, a plurality of universal joints are often provided, and a coupling shaft is provided between universal joint forks. The coupling shaft can be subjected to tensile force and punching force in the transmission process, and the coupling shaft can be damaged by fatigue after a long time. A spline shaft is used to replace a common coupling shaft, and the spline shaft can move in a shaft sleeve at a small distance. When the shaft sleeve is subjected to tensile force transmitted from the joint fork, the shaft sleeve is far away from the insertion end of the spline shaft, and the length of the spline shaft inserted into the shaft sleeve is reduced; when the shaft sleeve is subjected to the stamping force transmitted from the joint fork, the shaft sleeve can be driven to move towards the spline shaft, and the original insertion length of the spline shaft and the shaft sleeve is recovered. Under the alternating action of tensile load and stamping load, the position between the shaft sleeve and the spline shaft is kept unchanged, and the structure enables the spline shaft to effectively eliminate impact load and tensile load on the spline shaft. The spline shaft replaces a transmission shaft between common yoke forks, but the phenomenon of fracture caused by stretching and punching is avoided.

Furthermore, the flange is provided with a reinforcing rib. The reinforcing ribs are arranged to increase the strength of the flange and prevent the flange from being broken from the fork body.

Compared with the prior art, the utility model provides a universal joint convenient to detach when changing the cross, labour saving and time saving more. Structurally, the shaft sleeve of the cross shaft is omitted, the cross shaft is arranged on a joint yoke of the universal joint in a clamping mode, and the joint yoke is designed in a split mode, so that the joint yoke and the cross shaft are separated easily and are as simple as common cross universal joints.

Drawings

Fig. 1 is a schematic diagram of a conventional gimbal structure.

FIG. 2 is a schematic diagram of a cross.

Fig. 3 is a schematic structural diagram of the present invention.

Fig. 4 is an expanded view of the present invention.

In the figure: 1. a fork body; 2. a shaft sleeve; 3. a spline shaft; 4. a cross shaft; 5. mounting holes; 1-1, flange; 1-2, reinforcing ribs; 4-1 and a shaft head.

Detailed Description

The present invention will be further described with reference to the accompanying drawings, and fig. 1 is a schematic structural diagram of a conventional universal joint. The joint yoke of the existing universal joint is integral, so that the cross shaft 4 is difficult to disassemble. And the flange 1-1 of the yoke is thin. The yoke flange 1-1 of this joint becomes thinner due to wear during use and is easily broken from the yoke. The flange 1-1 of the utility model is provided with the reinforcing ribs 1-2, so that the wall body of the flange 1-1 is thicker, and the problem can not occur.

Fig. 3 is an embodiment of the utility model, this universal drive structure includes two universal joint forks and cross 4, and cross 4 includes two mutually perpendicular's sharp axle, and two universal joint forks can be around the diversified swing in cross 4 center, and the universal joint fork includes the fork body 1 that two laminating set up, is equipped with flange 1-1 on the fork body 1, is equipped with mounting hole 5 on the flange 1-1, and the spindle nose 4-1 of cross 4 is pegged graft in the installation. The two fork bodies 1 are inserted into a shaft sleeve 2, the shaft sleeve 2 restrains the two fork bodies 1, and the two fork bodies 1 are closed to restrain the cross shaft 4 in the mounting hole 5. Because the end part of the straight line shaft in the cross shaft 4 is provided with the reducing type shaft head 4-1, the inner diameter of the mounting hole 5 is larger than the outer diameter of the shaft head 4-1 of the cross shaft 4, and the central part of the cross shaft 4 can not pass through, the shaft head 4-1 of the cross shaft 4 is clamped in the mounting hole 5. Or, the end of the fork body 1 far from the flange 1-1 and the inner wall surface of the inner cavity of the shaft sleeve 2 can be provided with mutually matched threads, so that the fork body 1 can rotate into the shaft sleeve 2 through the threads. Therefore, the assembly of the shaft sleeves 2 of the fork body 1 is more labor-saving, and the length of the fork body 1 inserted into the shaft sleeves 2 can be adjusted.

The two fork bodies 1 can be locked in a bolt connection mode, and design requirements of the structure are further guaranteed. The method specifically comprises the following steps: set up a bolt hole respectively on two forks bodies 1, two bolt hole positions align, through passing a bolt two bolt holes again with the nut cooperation of the other end, and then can be with two forks bodies 1 locking lock to guarantee cross 4 joints in mounting hole 5.

A spline shaft 3 can be arranged on the shaft sleeve 2, and the spline shaft 3 is used for replacing a generally damageable connecting shaft. The key groove matched with the spline shaft 3 is arranged in the shaft sleeve 2, so that the spline shaft 3 can be connected with the shaft sleeves 2 at two ends, and the working stability of the universal joint is ensured by utilizing the characteristic that the spline shaft 3 can slide on the shaft sleeves 2. Specifically, the shaft sleeve 2 is slidably disposed on one end portion of the spline shaft 3, a key groove engaged with the spline shaft 3 is provided in the shaft sleeve 2, and the other shaft sleeve 2 is slidably disposed on the other end portion of the spline shaft 3, so that the impact between the shaft sleeves 2 can be alleviated.

Claims

1. The utility model provides a universal drive structure, includes two universal joint forks and the cross of hookup two universal joint forks, and the cross includes two mutually perpendicular's sharp axle, and its characterized in that, universal joint fork are split type structure, including the fork body that two laminating set up, are equipped with the flange on the fork body, are equipped with the mounting hole on the flange, and the spindle nose of cross is pegged graft in the mounting hole, and locking structure is used for two fork body locking locks.

2. The universal drive of claim 1, wherein the locking structure is a bushing, and an end of the fork body remote from the flange is inserted into an inner cavity of the bushing.

3. The universal drive of claim 1, wherein the locking structure is a bushing, the yoke is cylindrical, and threads are formed on an outer peripheral surface of an end of the yoke remote from the flange and an inner wall surface of an inner cavity of the bushing to engage with each other.

4. The universal transmission structure according to claim 1, wherein the locking structure is a bolt, the fork body is provided with a bolt hole, and the bolt passes through the bolt hole and cooperates with the nut to lock and fasten the two fork bodies.

5. A universal drive according to claim 2 or 3, wherein a sleeve is slidably disposed on one end of the spline shaft, the sleeve having a keyway for engaging the spline shaft, and the other end of the spline shaft having another sleeve slidably disposed thereon.

6. The universal drive of claim 1, wherein the flange has ribs.