CN214699095U

CN214699095U - Local pressure boost leak protection formula reduction gear shell structure assembly

Info

Publication number: CN214699095U
Application number: CN202120754835.1U
Authority: CN
Inventors: 隋景玉; 郝毅兴; 王立帅; 孟瑶; 王桃桃; 滕树全; 张成钺
Original assignee: Shandong Pengxiang Automobile Co Ltd
Current assignee: Shandong Pengxiang Automobile Co Ltd
Priority date: 2021-04-14
Filing date: 2021-04-14
Publication date: 2021-11-12
Anticipated expiration: 2031-04-14

Abstract

The utility model discloses a local pressurization leakage-proof type speed reducer shell structure assembly, which is characterized in that the assembly comprises a speed reducer shell, a leakage-proof pressurization fixing plate, a speed reducer fastening bolt and a leakage-proof pressurization jacking bolt; the leakage-proof pressurizing fixing plate is an auxiliary part which can be disassembled and assembled at any time, and does not need to be matched for a road vehicle with better working condition, and can be added for an engineering vehicle with severe working condition to improve the leakage-proof performance; the leakage-proof pressurizing jacking bolt can increase pressure between the reducer shell and the axle housing mounting surface to firmly compress the reducer shell and the axle housing, so that the problem of oil leakage caused by heavy-load deformation of the axle housing of the engineering vehicle and deformation of the axle housing in a sensitive position after the axle housing is subjected to thrust load of the upper thrust rod is solved; in addition, the increase of the local external diameter of the large installation surface of the reducer shell increases the contact area between the reducer shell and the axle housing, and the appearance of the leakage-proof pressurizing fixing plate coincides with that of the outer arc surface of the reducer shell, so that the assembly looks more attractive.

Description

Local pressure boost leak protection formula reduction gear shell structure assembly

Technical Field

The utility model relates to a heavily block car axle technical field, specifically say and a local pressure boost leak protection formula reduction gear shell structure assembly.

Background

The traditional drive axle assembly is influenced by multiple speed ratios of the same axle type, so that the driven bevel gear has multiple offset distances, and the shell of the speed reducer needs to take account of the multiple offset distances occupied by the driven bevel gear during working in design, so that a large driven bevel gear avoiding notch needs to be formed on the large surface of the shell of the speed reducer, which is mounted with the axle housing, in order to avoid the interference of the driven bevel gear and the shell of the speed reducer, and as a result, after the axle housing is assembled with the shell of the speed reducer, the local contact area is too small; for engineering vehicles, under the combined action of axle housing heavy load deformation and upper thrust rod loading, the axle housing has larger load deformation at the position of the opening on the reinforcing ring; the two points are main reasons for oil leakage of the engineering vehicle axle assembly, and oil leakage positions are all at upper openings of mounting surfaces of the axle housing and the reducer shell; however, if the same bridge type is matched and installed on a road vehicle, the vehicle has good use condition due to small bearing of the bridge assembly, so that the same oil leakage problem hardly exists on the road vehicle type.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the deficiencies of the prior art and providing a local pressure boost leak protection reduction gear shell structure assembly.

The utility model provides a technical scheme is: a local pressurization leakage-proof type speed reducer shell structure assembly is characterized by comprising a speed reducer shell, a leakage-proof pressurization fixing plate, a speed reducer fastening bolt and a leakage-proof pressurization jacking bolt; the number of the speed reducer fastening bolts is 2, through holes with the same size as the shaft diameter of the speed reducer fastening bolts are respectively arranged on the speed reducer shell and the leakage-proof pressurizing fixing plate, and the speed reducer shell and the leakage-proof pressurizing fixing plate are assembled together through the speed reducer fastening bolts; the leakage-proof pressurizing and jacking bolt is fixedly assembled with the leakage-proof pressurizing and jacking fixing plate through threaded connection, the lower end of the leakage-proof pressurizing and jacking bolt is jacked on the back of the large mounting face of the axle housing of the speed reducer, and a clearance of 3-5mm is reserved between the hexagonal head mounting face of the upper end bolt of the leakage-proof pressurizing and jacking bolt and the threaded hole mounting face.

Furthermore, an outer arc surface is arranged between the two through holes which are assembled and connected with the speed reducer shell and the leakage-proof pressurizing fixing plate, and the radius of the outer arc surface is 5-6mm larger than that of the rest outer arc surfaces on the large installation surface of the speed reducer shell and the axle housing.

Furthermore, after the leakproof pressurizing fixing plate is assembled with the shell of the speed reducer, the outer arc surface of the fixing plate of the leakproof pressurizing fixing plate is completely matched with the outer arc surface of the shell of the speed reducer along the vertical direction, namely the two are equal in radius and the position of the circle center is the same.

Furthermore, the inner side of the leakage-proof pressurizing fixing plate is provided with an interference avoiding notch, so that the leakage-proof pressurizing fixing plate is prevented from being assembled and interfered with the shell of the speed reducer.

Furthermore, the specification of the leak-proof pressurizing puller bolt is M16, the mechanical performance grade is 10.9 grade, and the tightening torque is 300 MPa.

The utility model has the advantages that: 1. the local outer diameter of the large mounting surface of the shell of the speed reducer is increased, so that the contact area between the shell of the speed reducer and an axle housing is increased, and the increased position is just at the position of the opening of the shell of the speed reducer, namely the position with the minimum contact area; 2. the leakage-proof pressurizing fixing plate and the leakage-proof pressurizing jacking bolt are additionally arranged at the local easy-loading deformation positions of the shell and the axle housing mounting surface of the speed reducer, the bolt is M16 in specification, the mechanical performance grade is 10.9 grade, the tightening torque is about 300MPa, and the pressure of not less than 10 tons is additionally increased at the bolt jacking position, so that the shell and the axle housing mounting surface of the speed reducer are firmly pressed together, and the oil leakage problem caused by heavy-load deformation of the axle housing of the engineering vehicle and deformation of the axle housing at a sensitive position after the axle housing is subjected to thrust load of an upper thrust rod is avoided; 3. the appearance of the leakage-proof pressurizing fixing plate is overlapped with the appearance of the outer arc surface of the shell of the speed reducer, so that the assembly looks more attractive; 4. the leak protection pressure boost fixed plate is the accessory that can dismouting at any time, to the better vehicle on road of service condition, need not match this piece, and to the abominable engineering car of service condition, can increase this piece and improve the leak protection performance.

Description of the drawings:

fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a view of the present invention in the direction of a;

fig. 3 is a schematic front view of the leakage-proof pressurizing fixing plate of the present invention;

fig. 4 is a schematic perspective view of the leakage-proof pressurizing fixing plate of the present invention;

fig. 5 is a front view of the reducer case of the present invention;

fig. 6 is a rear view structure diagram of the reducer case of the present invention.

In the figure: 1 reduction gear shell, 2 leak protection pressure boost fixed plates, 3 reduction gear fastening bolt, 4 leak protection pressure boost jack bolt, 11 outer arc face, the big face of 12 axle housing installation, 13 remaining outer arc face, 21 screw holes, 22 fixed plate outer arc face, 23 keep away the interference incision.

The specific implementation mode is as follows:

for a better understanding and appreciation of the invention, specific embodiments thereof are described in detail below with reference to the accompanying drawings.

As shown in fig. 1, 2, 3, 4, 5 and 6, a local pressurization leakage-proof type speed reducer shell structure assembly is composed of a speed reducer shell 1, a leakage-proof pressurization fixing plate 2, a speed reducer fastening bolt 3 and a leakage-proof pressurization jacking bolt 4; the leak-proof pressurizing puller bolt is M16 with the specification of 4, the mechanical performance grade is 10.9 grade, and the tightening torque is about 300 MPa; the number of the reducer fastening bolts is 2, and the reducer fastening bolts are assembled with the reducer shell 1 and the leakage-proof pressurizing fixing plate 2 through holes which are formed in the reducer shell 1 and the leakage-proof pressurizing fixing plate 2 and have the same diameter as the shaft diameter of the through holes; a threaded hole 21 is formed between through holes on two sides of the leakage-proof pressurizing fixing plate 2, the threaded hole 21 and the threads of the leakage-proof pressurizing jacking bolt 4 are equal in size, the leakage-proof pressurizing jacking bolt 4 and the leakage-proof pressurizing fixing plate 2 are connected, assembled and fixed together through threads, the lower end of the leakage-proof pressurizing jacking bolt 4 is propped against the back surface of the large installation surface 12 of the axle housing of the reducer shell 1, and a 3-5mm gap is reserved between the hexagonal head installation surface of the bolt at the upper end of the leakage-proof pressurizing jacking bolt 4 and the installation surface of the threaded hole 21; machining an outer arc surface 11 between two through holes which are formed in the reducer shell 1 and are assembled and connected with the leakage-proof pressurizing fixing plate 2, wherein the radius of the outer arc surface 11 is slightly larger than the radius of the rest outer arc surfaces 13 on the reducer shell 1 and the axle housing installation large surface 12 by 5-6 mm; after the leakage-proof pressurizing fixing plate 2 and the reducer housing 1 are assembled, the outer arc surface 22 of the fixing plate of the leakage-proof pressurizing fixing plate 2 is completely matched with the outer arc surface 11 of the reducer housing 1 along the vertical direction, namely the two are equal in radius processing and the circle center is the same in position; an interference avoiding notch 23 is processed on the inner side of the leakage-proof pressurizing fixing plate 2 to avoid the assembly interference of the leakage-proof pressurizing fixing plate 2 and the reducer shell 1.

The utility model discloses a local pressure boost leak protection formula retarder housing structure assembly, the during operation to the better vehicle for the road of use operating mode, when retarder assembly and axle housing assembly assemble, retarder housing and axle housing reinforcing ring installation face directly through the round bolt assembly fastening on the graduated circle can. For the engineering vehicle with severe working conditions, when the speed reducer assembly is assembled with the axle housing assembly, all the other bolts except the speed reducer fastening bolt are assembled and fastened, then the leakproof supercharging fixing plate is assembled on the shell of the speed reducer, and the length of the speed reducer fastening bolt is increased by the thickness of the fixing plate compared with the common bolt when the fixing plate is not assembled. After the speed reducer fastening bolt penetrates through the anti-leakage pressurizing fixing plate and the speed reducer shell and is tightly screwed on the axle housing, the anti-leakage pressurizing fixing plate is firmly fixed with the speed reducer shell and the axle housing assembly; at the moment, the leakage-proof pressurizing jacking bolt is assembled in a threaded hole in the leakage-proof pressurizing fixing plate, the bolt is M16 in specification, the mechanical performance grade is 10.9, the tightening torque is 300MPa, the lower end face of the bolt is tightly jacked on the shell of the speed reducer, and a gap of 3-5mm is reserved between the upper hexagonal head mounting face of the bolt and the threaded hole mounting face to avoid the problem of virtual tightening of the lower end face. After the operation is finished, in other words, the bolt is pushed tightly at the position, pressure of not less than 10 tons is additionally increased between the speed reducer shell and the axle housing assembly, the speed reducer shell and the axle housing are firmly pressed together, and the oil leakage problem caused by heavy load deformation of the axle housing of the engineering vehicle and deformation of a sensitive position after the axle housing is subjected to thrust load of the thrust rod on the axle housing is avoided.

It should be understood that technical features not described in detail in the specification belong to the prior art. Although the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many more forms without departing from the spirit and scope of the present invention.

Claims

1. A local pressurization leakage-proof type speed reducer shell structure assembly is characterized by comprising a speed reducer shell (1), a leakage-proof pressurization fixing plate (2), a speed reducer fastening bolt (3) and a leakage-proof pressurization jacking bolt (4); the number of the speed reducer fastening bolts (3) is 2, through holes with the same size as the shaft diameter of the speed reducer fastening bolts (3) are respectively arranged on the speed reducer shell (1) and the leakage-proof pressurizing fixing plate (2), and the speed reducer shell (1) and the leakage-proof pressurizing fixing plate (2) are assembled together through the speed reducer fastening bolts (3); the leakage-proof pressurizing fixing plate (2) is provided with a threaded hole (21) between through holes on two sides, the threaded hole (21) is equal to the thread size of the leakage-proof pressurizing jacking bolt (4), the leakage-proof pressurizing jacking bolt (4) is fixedly assembled with the leakage-proof pressurizing fixing plate (2) through threaded connection, the lower end of the leakage-proof pressurizing jacking bolt (4) is propped against the back surface of the large mounting surface (12) of the axle housing on the reducer shell (1), and a clearance of 3-5mm is reserved between the hexagonal head mounting surface of the upper end bolt of the leakage-proof pressurizing jacking bolt (4) and the mounting surface of the threaded hole (21).

2. The assembly of claim 1, wherein an outer arc surface (11) is arranged between the two through holes for assembling and connecting the reducer casing (1) and the leakage-proof pressurizing fixing plate (2), and the radius of the outer arc surface (11) is 5-6mm larger than the radius of the rest outer arc surfaces (13) on the reducer casing (1) and the axle housing installation large surface (12).

3. The assembly of claim 1, wherein after the anti-leakage pressurizing fixing plate (2) is assembled with the reducer casing (1), the outer arc surface (22) of the fixing plate of the anti-leakage pressurizing fixing plate (2) is completely matched with the outer arc surface (11) of the reducer casing (1) along the vertical direction, that is, the two have the same radius and the same center position.

4. The assembly of claim 1, wherein the inner side of the leakage-proof pressurizing fixing plate (2) is provided with an interference avoiding notch (23) to avoid the assembly interference between the leakage-proof pressurizing fixing plate (2) and the reducer housing (1).

5. The local pressurization leakage-proof type speed reducer shell structure assembly according to claim 1, wherein the leakage-proof pressurization jacking bolt (4) is in a specification of M16, the mechanical performance grade is 10.9 grade, and the tightening torque is 300 MPa.