CN204403191U - Expansion set buffering coupling - Google Patents

Abstract

The utility model discloses an expansion sleeve buffer coupling, which comprises a torque input end sleeve and a torque output end sleeve connected with the torque input end sleeve, and the torque output end sleeve is splined with a driven shaft connection, the torque input end casing is provided with an inner fastening sleeve and an outer fastening sleeve set on the inner fastening sleeve, the inner fastening sleeve is spline connected with the driving shaft, and the outer fastening sleeve It is splined connected with the casing at the torque input end, and the inner fastening sleeve and the outer fastening sleeve are matched with a tapered surface. The end of the inner fastening sleeve close to the torque input end sleeve is provided with a radial convex plate, and the diameter Connecting bolts extending into the outer fastening sleeve are arranged on the raised plate. The expansion sleeve buffer coupling has the advantages of simple structure, reliable use, and stronger applicability, and can be applied to working conditions with large torque, large impact, and irregular and frequent direction changes.

Description

Expansion sleeve buffer coupling

technical field

The utility model belongs to the technical field of shaft couplings, in particular to an expansion sleeve buffer shaft coupling.

Background technique

A coupling is a mechanical part used to connect two shafts (driving shaft and driven shaft) in different mechanisms to make them rotate together to transmit torque. In high-speed and heavy-duty power transmission, some couplings also have the functions of buffering, damping and improving the dynamic performance of the shafting. A general coupling consists of two halves, which are connected to the driving shaft and the driven shaft respectively. In the case of high speed, heavy load and impact, in order to achieve centering and transmit large impact torque, the drive shaft and driven shaft are mostly connected to the coupling by involute spline connection. However, affected by the size of the structure, the spline size on the drive shaft on the drive shaft is often small (such as hydraulic motors), and the coupling should be matched with traditional standard splines. When the spline size is tight, it is not easy to assemble. Hard smashing in will easily damage the internal bearing of the main machine, causing early damage to the hydraulic system. When the splines are loose, there is enough backlash between the splines for easy assembly, but under impact load conditions, the splines are easy to wear. Experiments have shown that under the condition of large impact load and frequent reversing conditions (such as the connection between the vibrating shaft in the vibrating wheel body of the road roller and the hydraulic motor), once the internal and external splines have tooth backlash, when the working reversing There will be a phenomenon of spline wear on the shaft or on the hole. Therefore, it is particularly important to design a coupling that has sufficient backlash during assembly, is easy to assemble, and can easily eliminate the backlash between the splines of the two connecting parts after assembly.

Utility model content

The purpose of the utility model is to overcome the shortcomings in the above-mentioned prior art and provide an expansion sleeve buffer coupling. The expansion sleeve buffer coupling has the advantages of simple structure, reliable use, and stronger applicability, and can be applied to working conditions with large torque, large impact, and irregular frequent reversing.

In order to achieve the above purpose, the technical solution adopted by the utility model is: an expansion sleeve buffer coupling, which is characterized in that it includes a torque input end sleeve and a torque output end sleeve connected to the torque input end sleeve. The sleeve at the torque output end is spline-connected with the driven shaft, and the sleeve at the torque input end is provided with an inner fastening sleeve and an outer fastening sleeve set on the inner fastening sleeve. The shaft is splined, the outer fastening sleeve is splined with the torque input end casing, the inner fastening sleeve and the outer fastening sleeve are tapered, and the inner fastening sleeve is close to the torque input end casing. One end is provided with a radial protruding plate, and the radial protruding plate is provided with connecting bolts extending into the outer fastening sleeve.

The above-mentioned expansion sleeve buffer coupling is characterized in that: the inner fastening sleeve is provided with a plurality of contraction joints arranged along its length direction.

The above-mentioned expansion sleeve buffer coupling is characterized in that: the sleeve at the torque input end and the sleeve at the torque output end are connected by plugging.

The above-mentioned expansion sleeve buffer coupling is characterized in that: one end of the sleeve at the torque output end is provided with a plurality of first plug-in blocks, and one end of the sleeve at the torque input end is provided with a plurality of second plug-in blocks , the second plug-in block is inserted between two adjacent first plug-in blocks, and an elastic body is filled between the first plug-in block and the adjacent second plug-in block.

The above-mentioned expansion sleeve buffer coupling is characterized in that: the outer fastening sleeve is provided with a retaining ring that is in contact with one end surface of the torque input end sleeve.

Compared with the prior art, the utility model has the following advantages:

1. The structure of the utility model is simple, and the design is novel and reasonable.

2. The utility model can conveniently eliminate the backlash of the spline after the spline is installed by adding the inner fastening sleeve and the outer fastening sleeve. So that the transmission system can meet the impact load requirements of frequent reversing.

3. The inner fastening sleeve of the utility model is provided with a plurality of shrinkage joints arranged along its length direction, so that the inner fastening sleeve can have a certain shrinkage deformation under the cooperation of the tapered surface of the outer fastening sleeve, so as to further Better eliminate the backlash of the spline between the drive shaft and the inner fastening sleeve.

4. The utility model has the advantages of low cost of realization, good use effect, and convenient popularization and use.

In summary, the utility model can meet the requirements of actual working conditions. Compared with the traditional coupling size and the overall size of the occupied space, no additional changes are required. The overall structure is simple, and the installation and disassembly are convenient. Compared with the traditional coupling, the utility model has a larger transmission torque. , longer service life.

The technical solutions of the present utility model will be further described in detail through the drawings and embodiments below.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a sectional view along line A-A of Fig. 1 .

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

Fig. 4 is a B-B sectional view of Fig. 3 .

Explanation of reference signs:

1—torque output end bushing; 2—the first plug block; 3—elastic body;

4—Second plug-in block; 5—Torque input end bushing; 6—Retaining ring;

7—External fastening sleeve; 8—Drive shaft; 9—Inner fastening sleeve;

10—connecting bolts; 11—radial convex plate; 12—driven shaft;

13—shrinkage joint. the

Detailed ways

An expansion sleeve buffer coupling as shown in Figure 1 includes a torque input sleeve 5 and a torque output sleeve 1 connected to the torque input sleeve 5, and the torque output sleeve 1 is connected to the torque output sleeve 5. The driven shaft 12 is splined, and the torque input end casing 5 is provided with an inner fastening sleeve 9 and an outer fastening sleeve 7 sleeved on the inner fastening sleeve 9, and the inner fastening sleeve 9 is connected to the inner fastening sleeve 9. The drive shaft 8 is splined, the outer fastening sleeve 7 is splined with the torque input end sleeve 5, the inner fastening sleeve 9 and the outer fastening sleeve 7 are taper-fitted, and the inner fastening sleeve 9 A radial protruding plate 11 is provided at one end close to the sleeve 5 at the torque input end, and a connecting bolt 10 extending into the outer fastening sleeve 7 is provided on the radial protruding plate 11 . Specifically, the radial convex plate 11 is provided with threaded holes for installing the connecting bolts 10 .

As shown in Figures 3 and 4, the inner fastening sleeve 9 is provided with a plurality of contraction joints 13 arranged along its lengthwise direction. This enables the inner fastening sleeve 9 to have a certain contraction deformation under the cooperation of the tapered surface of the outer fastening sleeve 7 , so as to better eliminate the backlash of the spline between the drive shaft 8 and the inner fastening sleeve 9 .

The sleeve 5 at the torque input end is plugged in with the sleeve 1 at the torque output end. One end of the torque output sleeve 1 is provided with a plurality of first plug-in blocks 2, and one end of the torque input sleeve 5 is provided with a plurality of second plug-in blocks 4, and the second plug-in blocks 4 Inserted between two adjacent first plug-in blocks 2 , the elastic body 3 is filled between the first plug-in block 2 and the adjacent second plug-in block 4 .

As shown in FIG. 1 , the outer fastening sleeve 7 is provided with a retaining ring 6 that is in contact with one end surface of the torque input end sleeve 5 .

In this embodiment, when the expansion sleeve buffer coupling works, since the inner fastening sleeve 9 is splined with the driving shaft 8 on the prime mover, the inner fastening sleeve 9 transmits torque to the The outer fastening sleeve 7, the outer fastening sleeve 7 transmits the torque to the sleeve 5 at the torque input end through the large spline of its variable diameter; the sleeve 5 at the torque input end transmits the input torque to the torque output end through the elastic body 3 bushing 1, and finally to the driven shaft 12. The reason why the outer fastening sleeve 7 can adjust the spline tooth side clearance between the inner fastening sleeve 9 and the driving shaft 8 after the inner fastening sleeve 9 is assembled is because the gap between the inner fastening sleeve 9 and the outer fastening sleeve 7 The conical surface fitting connection method is adopted between them, and the inner fastening sleeve 9 has a number of shrinkage joints 13 on the conical surface. The splines of sleeve 9 begin to shrink under the action of the conical surface of outer fastening sleeve 7 until the tooth side clearance is completely eliminated.

The above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any simple modifications, changes and equivalent structural transformations made to the above embodiments according to the technical essence of the present utility model still belong to Within the scope of protection of the technical solution of the utility model.

Claims (5)

1. The expansion sleeve buffer coupling is characterized in that: it includes a torque input end sleeve (5) and a torque output end sleeve (1) connected to the torque input end sleeve (5), and the torque output end The sleeve (1) is splined connected with the driven shaft (12), and the sleeve (5) at the torque input end is provided with an inner tightening sleeve (9) and an inner tightening sleeve (9) The outer fastening sleeve (7), the inner fastening sleeve (9) is spline connected with the drive shaft (8), the outer fastening sleeve (7) is spline connected with the torque input end casing (5), and the The inner fastening sleeve (9) and the outer fastening sleeve (7) are tapered, and the end of the inner fastening sleeve (9) close to the torque input end sleeve (5) is provided with a radial convex plate (11) , the radial convex plate (11) is provided with connecting bolts (10) extending into the outer fastening sleeve (7). 2. The expansion sleeve buffer coupling according to claim 1, characterized in that: the inner fastening sleeve (9) is provided with a plurality of contraction joints (13) arranged along its length direction. 3. The expansion sleeve buffer coupling according to claim 1, characterized in that: the torque input end sleeve (5) is plugged in with the torque output end sleeve (1). 4. The expansion sleeve buffer coupling according to claim 3, characterized in that: one end of the sleeve (1) at the torque output end is provided with a plurality of first plug blocks (2), and the torque input end One end of the sleeve (5) is provided with a plurality of second plug-in blocks (4), and the second plug-in blocks (4) are inserted between two adjacent first plug-in blocks (2), and the first An elastic body (3) is filled between the plug-in block (2) and the second plug-in block (4) adjacent thereto. 5. The expansion sleeve buffer coupling according to claim 1, characterized in that: the outer fastening sleeve (7) is provided with a stop that is in contact with one end surface of the torque input end sleeve (5). Circle (6).