A rear axle shell reduction device for excavators

Abstract

The utility model relates to the field of reducer housings, and in particular to a rear axle reducer housing for excavators. The technical problem to be solved by the utility model is to provide a rear axle reducer housing for excavators that can improve the installation tightness of the reducer housing and prevent the vibration from causing the bolts to loosen and affect the connection stability. A rear axle reducer housing for excavators includes a reducer housing body, a main cone bearing seat, connecting bolts, sealing washers, bolt rods, bolt heads, fastening sleeves, washers, elastic parts and pins. The utility model achieves the effect of improving the installation tightness of the reducer housing and preventing the vibration from causing the bolts to loosen and affect the connection stability.

Description

Technical Field

[0001] The utility model relates to the field of reducer housings, in particular to a rear axle reducer housing for an excavator. Background Art

[0002] The rear axle reducer housing for excavators usually refers to the reducer housing in the rear axle of the excavator. Its main function is to accommodate and protect the gears, bearings and other transmission elements inside the reducer. At the same time, it also serves as the installation basis for these transmission elements. The operating environment of the excavator is complex and changeable, and it is often necessary to operate under harsh conditions. Therefore, the rear axle reducer housing is usually made of high-strength materials, such as cast iron or alloy steel, to ensure that it has sufficient strength and durability. The main reducers are usually fixedly connected by multiple bolts. When driving or operating on roads with complex road conditions, large and frequent vibrations will be generated, which will make the bolts easily loosen and fall off, affecting the installation stability of the main reducer housing. Therefore, it is urgent to develop a rear axle reducer housing for excavators that can improve the installation tightness of the reducer housing and prevent the vibration from causing the bolts to loosen and affect the connection stability. Utility Model Content

[0003] In order to overcome the disadvantage that the main reducers are usually fixedly connected by multiple bolts, which may cause large and frequent vibrations when driving or working on roads with complex road conditions, making the bolts easily loose and fall off, thereby affecting the installation stability of the main reducer housing, the technical problem to be solved by the utility model is to provide a rear axle reducer housing for excavators that can improve the installation tightness of the reducer housing and prevent the vibration from causing the bolts to loosen and affect the connection stability.

[0004] The utility model is achieved by the following specific technical means:

[0005] A rear axle shell reducer for an excavator comprises a shell reducer body; a main cone bearing seat fixedly connected to the shell reducer body; and a sealing gasket is arranged on the end surface of the connection between the shell reducer body and the main cone bearing seat.

[0006] The shell reducing body is fixedly connected to the main cone bearing seat by a high-tightening connecting bolt; the connecting bolt includes a bolt rod and a bolt head fixedly arranged at one end of the bolt rod; a clamping groove is arranged on the outer diameter surface of one end of the bolt rod close to the bolt head, and a clamping sleeve is fixedly arranged in the clamping groove; a washer is arranged on the side of the bolt head close to the bolt rod; a protruding ring is arranged on the surface of one end of the washer close to the bolt head, and an annular groove is arranged on the surface of one end of the bolt head close to the washer, and the protruding ring of the washer is slidably arranged in the annular groove of the bolt head; an elastic member is also fixedly arranged in the annular groove of the bolt head.

[0007] Furthermore, one end of the fastening sleeve is a conical ring structure, the outer diameter of the side close to the bolt head is larger than the outer diameter of the side away from the bolt head, and a plurality of open grooves are provided on the conical sleeve-shaped fastening sleeve; the conical ring structure enables the fastening sleeve to be clamped to the mounting hole, and the open grooves enable the conical sleeve-shaped fastening sleeve to be radially deformed, which is conducive to clamping the mounting hole.

[0008] Furthermore, the fastening sleeve is a split structure, including two clamping blocks, and the two clamping blocks are fixedly connected to the bolt rod through pins respectively; the split structure facilitates the connection between the fastening sleeve and the bolt rod.

[0009] Furthermore, the outer diameter surface of the fastening sleeve is provided with anti-skid patterns, so that the fastening sleeve and the side wall of the mounting hole are clamped more tightly.

[0010] Furthermore, the fastening sleeve is made of spring steel; the spring steel has good elasticity, which facilitates clamping the mounting hole and prevents the fastening sleeve from being deformed.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The utility model achieves the effect of improving the installation fastness of the reducer housing and preventing the generated vibration from causing the bolts to loosen and affect the connection stability.

[0013] The shell reducing body and the main cone bearing seat are fixedly connected by high-tightening connecting bolts, which make the connection between the shell reducing body and the main cone bearing seat more tightly, and prevent the bolts from loosening and affecting the connection stability between the shell reducing body and the main cone bearing seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0015] Figure 2 It is a cross-sectional structural schematic diagram of the utility model.

[0016] Figure 3 It is a schematic diagram of the cross-sectional structure of the connecting bolt of the utility model.

[0017] Figure 4 It is a schematic diagram of the three-dimensional structure of the fastening sleeve of the utility model.

[0018] The markings in the accompanying drawings are: 1-reducing shell body, 2-main cone bearing seat, 3-connecting bolt, 4-sealing washer, 31-bolt rod, 32-bolt head, 33-fastening sleeve, 34-washer, 35-elastic part, 36-pin, 331-block. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings: Example

[0020] A rear axle shell reduction for an excavator, such as Figure 1-4 As shown, it includes a shell reduction body 1; a main cone bearing seat 2 fixedly connected to the shell reduction body 1; and a sealing gasket 4 is provided on the end surface of the connection between the shell reduction body 1 and the main cone bearing seat 2;

[0021] The shell reduction body 1 is fixedly connected to the main cone bearing seat 2 by a high-tightness connecting bolt 3; the connecting bolt 3 includes a bolt rod 31 and a bolt head 32 fixedly arranged at one end of the bolt rod 31; a clamping groove is arranged on the outer diameter surface of one end of the bolt rod 31 close to the bolt head 32, and a fastening sleeve 33 is fixedly arranged in the clamping groove; a washer 34 is arranged on the side of the bolt head 32 close to the bolt rod 31; a protruding ring is arranged on the surface of the washer 34 close to one end of the bolt head 32, and an annular groove is arranged on the surface of the bolt head 32 close to one end of the washer 34, and the protruding ring of the washer 34 is slidably arranged in the annular groove of the bolt head 32; an elastic member 35 is also fixedly arranged in the annular groove of the bolt head 32.

[0022] Working principle:

[0023] The utility model rear axle reducer housing, the reducer housing body 1 and the main cone bearing seat 2 are fixedly connected by high-tightening connecting bolts 3, so that the connection between the reducer housing body 1 and the main cone bearing seat 2 is more tightened, and the bolts are prevented from loosening and affecting the connection stability between the reducer housing body 1 and the main cone bearing seat 2.

[0024] The bolt rod 31 of the connecting bolt 3 is provided with a clamping groove, and a fastening sleeve 33 is fixedly arranged in the clamping groove; the fastening sleeve 33 is a tapered collar structure, and the outer diameter of the side close to the bolt head 32 is larger than the outer diameter of the side away from the bolt head 32, and a plurality of opening grooves are evenly and equidistantly provided on the tapered sleeve-shaped fastening sleeve 33; when the connecting bolt 3 is installed, the fastening sleeve 33 enters the mounting hole with the bolt rod 31, and under the extrusion of the mounting hole, the fastening sleeve 33 deforms and contracts, generating an outward expansion force, and extruding and rubbing with the side wall of the mounting hole, so that the fastening sleeve 33 clamps the side wall of the mounting hole to prevent the bolt from loosening when vibration occurs, and at the same time, the outer diameter surface of the fastening sleeve 33 is provided with anti-slip patterns, so that the friction between the fastening sleeve 33 and the side wall of the mounting hole is increased, and the clamping is tighter.

[0025] A washer 34 is provided on the side of the bolt head 32 close to the bolt rod 31, and a protruding ring is provided on the surface of the washer 34 close to one end of the bolt head 32, and an annular groove is provided on the surface of the bolt head 32 close to one end of the washer 34. The protruding ring of the washer 34 is slidably set in the annular groove set in the bolt head 32; an elastic member 35 is also fixedly set in the annular groove set in the bolt head 32; the washer 34 squeezes the elastic member 35 so that the elastic member 35 generates a force that pushes the bolt head 32 outward, thereby pre-tightening the connecting bolt 3 to prevent the vibration from loosening the connecting bolt 3, further increasing the installation tightness.

[0026] Although the present disclosure has been described in detail with reference to the exemplary embodiments, the present disclosure is not limited thereto, and it will be apparent to those skilled in the art that various modifications and changes may be made thereto without departing from the scope of the present disclosure.

Claims

1. A rear axle reducer for an excavator, comprising a reducer body (1); a main cone bearing seat (2) fixedly connected to the reducer body (1); a sealing gasket (4) being provided on the end surface of the connection between the reducer body (1) and the main cone bearing seat (2); It is characterized in that The shell reducing body (1) is fixedly connected to the main cone bearing seat (2) by means of a high-tightness connecting bolt (3); the connecting bolt (3) comprises a bolt rod (31) and a bolt head (32) fixedly arranged at one end of the bolt rod (31); a clamping groove is arranged on the outer diameter surface of one end of the bolt rod (31) close to the bolt head (32), and a fastening sleeve (33) is fixedly arranged in the clamping groove; a washer (34) is arranged on one side of the bolt head (32) close to the bolt rod (31); a protruding ring is arranged on the surface of one end of the washer (34) close to the bolt head (32), and a ring groove is arranged on the surface of one end of the bolt head (32) close to the washer (34), and the protruding ring of the washer (34) is slidably arranged in the ring groove of the bolt head (32); and an elastic member (35) is also fixedly arranged in the ring groove of the bolt head (32).

2. The rear axle shell reduction for an excavator according to claim 1, characterized in that: One end of the fastening sleeve (33) is a conical collar structure, the outer diameter of the side close to the bolt head (32) is larger than the outer diameter of the side away from the bolt head (32), and a plurality of open grooves are formed on the conical collar-shaped fastening sleeve (33).

3. The rear axle shell reduction for an excavator according to claim 1, characterized in that: The fastening sleeve (33) is a split structure, comprising two clamping blocks (331), and the two clamping blocks (331) are fixedly connected to the bolt rod (31) via pins (36) respectively.

4. The rear axle shell reduction for an excavator according to claim 1, characterized in that: The outer diameter surface of the fastening sleeve (33) is provided with anti-slip patterns.

5. The rear axle shell reduction for an excavator according to claim 1, characterized in that: The fastening sleeve (33) is made of spring steel.

Images