Hydraulic front axle disengaging mechanism of time-sharing four-wheel-drive system of high-speed wheel type engineering equipment

Abstract

The utility model discloses a hydraulic front axle disengagement mechanism of a time-sharing four-wheel drive system of high-speed wheel type engineering equipment, which comprises a shifting fork, and a sliding sleeve connecting part is arranged on the outer wall of the shifting fork; two axial ends of the shifting fork are respectively provided with a position sensor target and a piston; the connecting rod sequentially penetrates through the position sensor target and the shifting fork to be connected with the piston. Hydraulic pressure is adopted for driving, a front axle disengaging mechanism is controlled to act, a front axle output shaft is cut off / combined, and therefore the requirement for four-wheel-drive / two-wheel-drive power mode switching is met. The front axle disengagement mechanism adopts a split design, and the connecting rod is connected with the piston bolt, so that the processing, manufacturing, replacing and repairing cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of time-sharing four-wheel drive systems, and in particular relates to a hydraulic front axle disengagement mechanism of a time-sharing four-wheel drive system for high-speed wheeled engineering equipment. Background Art

[0002] The existing construction machinery part-time four-wheel drive system uses a mechanical push rod or lever to switch between two-wheel drive and four-wheel drive, which is prone to wear and tear and inconvenient to maintain.

[0003] The patent with application number CN200520092041.4 discloses an inter-bridge clutch device suitable for switching between two-wheel drive and four-wheel drive of various vehicles, and discloses a half-shaft separator assembly including a housing composed of an inner housing and an outer housing, the inner housing and the outer housing are fixedly connected by bolts, the inner half-shaft is installed on the inner housing through a bearing, the end of the inner half-shaft is a spline shaft, the outer edge of the sliding gear ring has a groove, the shift fork is installed in the groove of the sliding gear ring, the shift fork shaft is fixedly connected to the shift fork, the outer gear sleeve is installed on the housing through a bearing, the inner end of the outer gear sleeve has an outer spline, and the sliding gear ring selectively meshes with the splines of the inner half-shaft and the outer gear sleeve. A diaphragm is installed in the air chamber to divide the air chamber into two chambers, and an air chamber push rod is fixedly installed on one side of the diaphragm, and the air chamber push rod is installed in the guide hole of the air chamber body to ensure the stable movement of the air chamber push rod. The other end of the air chamber push rod is fixedly connected to the shift fork shaft through a pin shaft, and an elastic sleeve of the shift fork shaft is sleeved on the outside. In this patent, the fork shaft and the fork are fixedly connected. When the fork shaft or the fork is worn or directly damaged during use, the entirety needs to be replaced, which is costly and cumbersome to operate. Utility Model Content

[0004] In order to solve the above problems, the utility model aims to provide a hydraulic front axle disengagement mechanism for a time-sharing four-wheel drive system of high-speed wheeled engineering equipment.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A hydraulic front axle disengagement mechanism of a time-sharing four-wheel drive system of high-speed wheeled engineering equipment comprises a shift fork, a sliding sleeve connection portion is arranged on the upper outer wall of the shift fork; a position sensor target and a piston are arranged at both ends of the axial direction of the shift fork respectively;

[0007] The connecting rod passes through the position sensor target, the shift fork and is connected to the piston in sequence.

[0008] One end of the connecting rod is connected to the piston through a first bolt; the other end is connected to the position sensor target and the shift fork through a second bolt.

[0009] A limiting groove is arranged at one axial end of the shift fork.

[0010] A limiting hole is arranged in the position sensor target, and the limiting groove is connected with the limiting hole.

[0011] One end of the connecting rod is provided with a limiting portion adapted to the limiting groove and the limiting hole.

[0012] With the cooperation of the limiting groove, the limiting hole and the limiting part, the shift fork, the position sensor target and the connecting rod rotate in the same direction.

[0013] A piston sleeve and an end cover are arranged on the outer peripheral wall of the piston. The piston sleeve is arranged on one side of the shift fork, and the end cover is arranged away from the shift fork. The piston sleeve extends to be connected with the inside of the end cover.

[0014] The end cover is provided with a first interface and a second interface which are communicated with the piston.

[0015] The axis of the first interface is perpendicular to the axis of the piston; the second interface is coaxially arranged with the piston.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] A hydraulic front axle disengagement mechanism for a time-sharing four-wheel drive system of high-speed wheeled engineering equipment is driven by hydraulic pressure to control the front axle disengagement mechanism to operate, cut off / connect the front axle output shaft to meet the power mode switching of four-wheel drive / two-wheel drive. The front axle disengagement mechanism adopts a split design, and the connecting rod is connected to the piston bolt, which reduces the processing, manufacturing and replacement costs.

[0018] An upper limit groove of the shift fork and a limit hole are arranged in the position sensor target, and a limit part which is adapted to the limit groove and the limit hole is arranged at one end of the connecting rod. With the cooperation of the limit groove, the limit hole and the limit part, the position sensor target, the shift fork and the connecting rod move synchronously; the working state of the front axle disengagement mechanism is detected through the two extreme positions within the travel of the position sensor target. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the specific embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of a hydraulic front axle disengagement mechanism of a time-sharing four-wheel drive system of a high-speed wheeled engineering equipment in the utility model;

[0021] Figure 2 for Figure 1 Exploded diagram of

[0022] Figure 3 for Figure 1 A cross-sectional view of

[0023] Figure 4 It is a structural schematic diagram of the shift fork, connecting rod and position sensor target in the utility model;

[0024] Figure 5 It is a structural schematic diagram of the shift fork in the utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the position sensor target in the utility model;

[0026] Figure 7 It is a structural schematic diagram of the connecting rod in the utility model;

[0027] Figure 8 This is a diagram showing the use state of the front axle disengagement mechanism in the utility model;

[0028] Fig. 9 for Figure 8 Schematic diagram of the structure of the middle sleeve.

[0029] Figure markings: 1-shift fork, 101-sleeve connecting part, 102-limiting groove, 2-position sensor target, 21-limiting hole, 3-piston, 4-connecting rod, 41-limiting part, 5-first bolt, 6-second bolt, 7-piston sleeve, 8-end cover, 81-first interface, 82-second interface, 9-front axle output shaft, 10-rear axle output shaft, 11-sleeve, 110-guide chamfer. DETAILED DESCRIPTION

[0030] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but it should not be understood that the scope of the subject matter described in the present invention is limited to the following embodiments. Without departing from the above-mentioned technical ideas of the present invention, various modifications, substitutions and changes made according to the common technical knowledge and customary means in the field are included in the scope of the present invention.

[0031] Reference Figures 1 to 9 The utility model discloses a hydraulic front axle disengagement mechanism of a time-sharing four-wheel drive system for high-speed wheeled engineering equipment, which is driven by hydraulic pressure to control the front axle disengagement mechanism to move and cut off / connect the front axle output shaft 9 to meet the power mode switching between four-wheel drive and two-wheel drive.

[0032] The front axle disengagement mechanism comprises a fork 1, and a through hole is arranged in the axial direction of the fork 1; Figure 8 and Fig. 9 A sleeve connecting portion 101 is provided on the outer wall of the shift fork 1, and an arc portion adapted to the outer wall of the sleeve 11 is provided on the sleeve connecting portion 101. The sleeve 11 is provided with a guide chamfer 110 so that when the front axle disengagement mechanism performs reciprocating motion, the sleeve 11 and the rear axle output shaft 10 are more easily combined and wear is reduced.

[0033] The two ends of the fork 1 are provided with a position sensor target 2 and a piston 3 respectively; a connecting rod 4 is installed in the through hole of the fork 1, specifically, the connecting rod 4 passes through the position sensor target 2 and the through hole of the fork 1 in sequence and is connected to the piston 3, the connecting rod 4 is connected to the piston 3 through a first bolt 5, and the connecting rod 4 is connected to the inner wall of the piston 3. In the utility model, the front axle disengagement mechanism adopts a split design, and the connecting rod is connected to the piston bolt, which reduces the processing and manufacturing and replacement costs.

[0034] The connecting rod 4 and the piston 3 are of split design. The connecting rod 4 is connected to the position sensor target 2 and the fork 1 through the second bolt 6. The position sensor target 2 and the connecting rod 4 move synchronously. The two extreme positions within the stroke are detected by different position sensors and different signals are output to transmit the information of the action of the front axle disengagement mechanism.

[0035] Reference Figures 4 to 7 A limiting groove 102 communicating with the through hole is provided at one axial end of the shift fork 1. A limiting hole 21 is provided in the position sensor target 2, and the limiting groove 102 communicates with the limiting hole 21. A limiting portion 41 adapted to the limiting groove 102 and the limiting hole 21 is provided at one end of the connecting rod 4.

[0036] With the cooperation of the limit groove 102, the limit hole 21 and the limit portion 41, the shift fork 1, the position sensor target 2 and the connecting rod 4 rotate in the same direction. The position sensor target 2 and the shift fork 1 act synchronously to calibrate the action of the front axle disengagement mechanism at the two extreme positions of the stroke.

[0037] A piston sleeve 7 and an end cover 8 are provided on the outer peripheral wall of the piston 3 . The end cover 8 is provided away from the shift fork 1 . The piston sleeve 7 is provided on one side of the shift fork 1 . The piston sleeve 7 extends to be connected with the inside of the end cover 8 .

[0038] The end cover 8 is provided with a first interface 81 and a second interface 82 which are in communication with the piston 3 . The axis of the first interface 81 is perpendicular to the axis of the piston 3 ; the second interface 82 is coaxially arranged with the piston 3 .

[0039] When in use, the first interface 81 and the second interface 82 are respectively connected to the large and small chambers in the cylinder body of the piston 3. Through the hydraulic drive action, the hydraulic oil is pressurized by the pump, and the hydraulic oil pushes the piston 3 through the second interface 82, so that the fork 1 shifts the sleeve 11 to combine with the rear axle output shaft 10 to transmit power, and the piston 3 is reset through the first interface 81 to cut off the front axle power output.

[0040] The above is a detailed introduction to the hydraulic front axle disengagement mechanism of a time-sharing four-wheel drive system for high-speed wheeled engineering equipment provided by the utility model. This article uses specific examples to illustrate the structure and working principle of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A hydraulic front axle disengagement mechanism for a time-sharing four-wheel drive system of high-speed wheeled engineering equipment, characterized in that: It comprises a shift fork (1), wherein a sliding sleeve connecting portion (101) is arranged on the upper outer wall of the shift fork (1); a position sensor target (2) and a piston (3) are respectively arranged at two axial ends of the shift fork (1); The connecting rod (4) passes through the position sensor target (2), the shift fork (1) and is connected to the piston (3) in sequence.

2. The hydraulic front axle disengagement mechanism of a time-sharing four-wheel drive system of high-speed wheeled engineering equipment according to claim 1, characterized in that: One end of the connecting rod (4) is connected to the piston (3) via a first bolt (5); the other end is connected to the position sensor target (2) and the shift fork (1) via a second bolt (6).

3. A hydraulic front axle disengagement mechanism for a time-sharing four-wheel drive system of high-speed wheeled engineering equipment according to any one of claims 1 or 2, characterized in that: A limiting groove (102) is provided at one axial end of the shift fork (1).

4. The hydraulic front axle disengagement mechanism of a time-sharing four-wheel drive system of high-speed wheeled engineering equipment according to claim 3, characterized in that: A limiting hole (21) is provided in the position sensor target (2), and the limiting groove (102) is connected to the limiting hole (21).

5. The hydraulic front axle disengagement mechanism of a time-sharing four-wheel drive system of high-speed wheeled engineering equipment according to claim 4, characterized in that: One end of the connecting rod (4) is provided with a limiting portion (41) adapted to the limiting groove (102) and the limiting hole (21).

6. The hydraulic front axle disengagement mechanism of a time-sharing four-wheel drive system of high-speed wheeled engineering equipment according to claim 5, characterized in that: With the cooperation of the limiting groove (102), the limiting hole (21) and the limiting portion (41), the shift fork (1), the position sensor target (2) and the connecting rod (4) rotate in the same direction.

7. The hydraulic front axle disengagement mechanism of a time-sharing four-wheel drive system of high-speed wheeled engineering equipment according to claim 1, characterized in that: A piston sleeve (7) and an end cover (8) are arranged on the outer peripheral wall of the piston (3); the piston sleeve (7) is arranged on one side of the shift fork (1), the end cover (8) is arranged away from the shift fork (1), and the piston sleeve (7) extends to connect with the inside of the end cover (8).

8. The hydraulic front axle disengagement mechanism of a time-sharing four-wheel drive system of high-speed wheeled engineering equipment according to claim 7, characterized in that: The end cover (8) is provided with a first interface (81) and a second interface (82) which are in communication with the piston (3).

9. The hydraulic front axle disengagement mechanism of a time-sharing four-wheel drive system of high-speed wheeled engineering equipment according to claim 8, characterized in that: The axis of the first interface (81) is perpendicular to the axis of the piston (3); the second interface (82) is coaxially arranged with the piston (3).

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