Air tightness detection device for AMT gearbox of commercial vehicle

Abstract

The utility model specifically relates to a commercial vehicle AMT gearbox air tightness detection device, and aims to solve the problem that an adjusting transposition mechanism in a conventional AMT gearbox air tightness detection device is easy to fall off and damage. The device comprises a mobile vehicle body, and an air pump and a supporting assembly which are arranged on the mobile vehicle body, wherein the supporting assembly comprises a transverse supporting frame and a longitudinal supporting frame; a first lead screw nut assembly and a first driving assembly connected with the first lead screw nut assembly are arranged at the upper end of the longitudinal supporting frame, a reciprocating device and a second lead screw nut assembly installed in the reciprocating device are arranged on the transverse supporting frame, an air tightness detection device is arranged on a transmission nut of the reciprocating device through a connecting piece, and the air tightness detection device is in sealed connection with an air pump through an air pipe; a transmission nut in the first driving assembly is connected with the reciprocating device through a connecting rod; during working, the first lead screw nut assembly drives the reciprocating device to longitudinally move in the horizontal direction, and the second lead screw nut assembly drives the air tightness detection device to transversely move in the horizontal direction.

Description

TECHNICAL FIELD

[0001] The utility model relates to a gearbox airtightness detection device, concretely relates to a commercial vehicle AMT gearbox airtightness detection device. BACKGROUND

[0002] The commercial vehicle AMT gearbox is an automatic transmission device, aiming at realizing automatic gear shifting operation to adapt to the driving demand under different vehicle speeds and engine rotating speeds. Compared with the traditional manual gearbox, it has higher automation degree and operation convenience. During the gearbox assembly process, the operator needs to fill the gearbox with oil and ensure that the commercial vehicle AMT gearbox is in a sealed state, therefore, it is necessary to detect the airtightness of the commercial vehicle AMT gearbox.

[0003] The Chinese patent with the application number CN202322581396.0 discloses an AMT gearbox airtightness detection device, which comprises a bottom plate, a moving wheel arranged at the bottom of the bottom plate, a push handle and a support frame fixedly installed at the top of the bottom plate, an adjusting transposition mechanism arranged outside the support frame, a sealing detection mechanism arranged at the top of the bottom plate, the sealing detection mechanism comprising a lifting assembly and a detection assembly, the lifting assembly being arranged at the bottom of the adjusting transposition mechanism, and the detection assembly being arranged between the bottom plate and the lifting assembly. In the use process, the sealing detection mechanism arranged in the AMT gearbox airtightness detection device is driven by a third motor to move the sealing pipe downward, the sealing pipe is inserted into the oil filling port of the gearbox, and the third screw rod is locked with the threaded cylinder, so as to avoid the situation that the sealing pipe is pushed out due to excessive internal pressure of the gearbox.

[0004] The adjusting transposition mechanism of the above-mentioned AMT gearbox airtightness detection device is provided with an adjusting transposition mechanism outside the support frame, but the adjusting transposition mechanism is not provided with a support assembly, and the adjusting transposition mechanism only has a single support pad, which is easy to cause the adjusting transposition mechanism to fall off, thereby causing damage to the adjusting transposition mechanism and requiring a large amount of time to repair the adjusting transposition mechanism. UTILITY MODEL CONTENTS

[0005] The main purpose of the utility model is to solve the problem that the adjusting transposition mechanism of the existing AMT gearbox airtightness detection device is easy to fall off and be damaged, and to provide a commercial vehicle AMT gearbox airtightness detection device.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions:

[0007] A commercial vehicle AMT gearbox airtightness detection device, comprising a moving vehicle body, an air pump arranged on the moving vehicle body, and an air pipe sealedly connected at one end of the air pump, the other end of the air pipe being sealedly connected with an airtightness detection device, wherein the special feature is that:

[0008] The mobile vehicle body is further provided with a support assembly;

[0009] The support assembly comprises a limiting assembly, which comprises a support frame, the support frame comprising a longitudinal support frame and a transverse support frame arranged at the upper end of the longitudinal support frame; the upper end of the longitudinal support frame is provided with a first screw nut assembly, and the longitudinal support frame is provided with a guide groove at a position corresponding to the first screw nut assembly;

[0010] The first screw nut assembly is driven by a first driving assembly, which drives the first screw nut assembly to rotate when working, so that the transmission nut moves along the horizontal longitudinal direction on the first screw nut assembly;

[0011] The transverse support frame is provided with a reciprocating device, which comprises a mounting frame, the mounting frame being slidably connected with the transverse support frame, and the mounting frame being capable of moving along the horizontal longitudinal direction on the transverse support frame; one end of the mounting frame close to the longitudinal support frame is connected with the transmission nut of the first screw nut assembly; the mounting frame is provided with a second screw nut assembly; a second driving assembly is arranged at the end of the mounting frame away from the longitudinal support frame, for driving the screw of the second screw nut assembly to rotate, so that the transmission nut of the second screw nut assembly moves along the horizontal transverse direction;

[0012] The air tightness detection device is fixedly connected to the transmission nut of the second screw nut assembly through a connecting piece, and the detection end thereof is arranged downward, for being inserted into the oil filling port of the commercial vehicle AMT gearbox during detection, and for inflating the inside of the commercial vehicle AMT gearbox through the air pump and the air pipe, so as to detect the air tightness of the inside of the commercial vehicle AMT gearbox.

[0013] Further, the transverse support frame is of a hollow rectangular structure, and portions of the transverse support frame parallel to the arrangement direction of the wheels of the mobile vehicle body are each provided with a mounting groove; one or more concave connecting plates are fixedly installed on the upper end surface of the transverse support frame, each of the connecting plates is provided with a mounting hole at each end corresponding to the position of the mounting groove of the transverse support frame, and a limiting rod with a size matching that of the mounting hole is fixedly installed in the mounting hole; a adjusting connecting piece is sleeved on the middle section of each of the limiting rods, and the base of each of the adjusting connecting pieces is fixedly installed on the mounting frame, so that when the mounting frame moves along the horizontal longitudinal direction, the adjusting connecting pieces mounted thereon slide along the horizontal longitudinal direction on the middle sections of the limiting rods.

[0014] Further, the left and right sides of the upper end surface and the lower end surface of the connecting piece are each provided with two positioning bosses, and a sliding connecting rod is slidably connected to each of the positioning bosses; the two ends of the four sliding connecting rods are fixedly connected to the inner walls of the mounting frame, for ensuring the balance of the connecting piece during movement.

[0015] Further, two ends of each of the limiting rods are threaded, and nuts are mounted on the threaded ends, for fixing the limiting rods in the connecting plates.

[0016] Further, a locking bolt is arranged on each of the connecting plates at a position corresponding to the transverse support frame, for fixing the connecting plates on the support frame.

[0017] Further, the first driving assembly comprises a first driving motor and a transmission belt, the first driving motor is arranged on the moving vehicle body, and the transmission belt is arranged between an output end of the first driving motor and an input end of the first screw nut assembly; when the first driving motor works, the first screw nut assembly is driven to rotate by the transmission belt, so that the transmission nut and the mounting frame connected with the transmission nut through the connecting rod move along the horizontal direction of the first screw nut assembly.

[0018] Further, the moving vehicle body is arranged in a hollow structure at a position corresponding to the transverse support frame; when detection is performed, the moving vehicle body is moved to a proper position, so that the commercial vehicle AMT gearbox is located in the hollow position for detection.

[0019] Compared with the prior art, the commercial vehicle AMT gearbox air tightness detection device has the following beneficial effects:

[0020] The support frame in the original device is improved to be L-shaped, and the limiting rod and the adjusting connecting piece for connecting the reciprocating device and the transverse support frame are additionally arranged, so that the reciprocating device can be kept stable during the adjusting process and will not fall off the transverse support frame, the risk of failure during the working process is reduced, and the maintenance cost is saved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural schematic view of an embodiment of the commercial vehicle AMT gearbox air tightness detection device of the utility model;

[0022] Figure 2 is Figure 1 is a local enlarged schematic view of region A;

[0023] Figure 3 is a three-dimensional structural schematic view of the support assembly and the moving vehicle body in the embodiment of the commercial vehicle AMT gearbox air tightness detection device of the utility model;

[0024] Figure 4 is Figure 3 is a local enlarged schematic view of region B.

[0025] EXPLANATION OF REFERENCE NUMERALS:

[0026] 1-Support assembly; 11-Connector; 12-First lead screw and nut assembly; 13-Reciprocating device; 131-Mounting frame; 132-Second lead screw and nut assembly; 133-Sliding connecting rod; 14-Limiting assembly; 141-Supporting frame; 142-Limiting rod; 143-Connecting plate; 144-Locking bolt; 145-Adjusting connector; 2-First drive assembly; 3-Moving vehicle body; 4-Air pump; 5-Air tightness detection device; 6-Air pipe. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0028] A device for testing the air tightness of AMT transmissions in commercial vehicles, such as Figures 1-4 As shown, it includes a mobile vehicle body 3, and an air pump 4 and a support assembly 1 arranged sequentially on the mobile vehicle body 3. The mobile vehicle body 3 is also provided with a first drive assembly 2. One end of the air pipe 6 is sealed and connected to the air pump 4, and the other end of the air pipe 6 is sealed and connected to an airtightness detection device 5.

[0029] The support assembly 1 includes a limiting assembly 14 fixedly connected to the mobile vehicle body 3. The limiting assembly 14 includes a support frame 141, which includes a longitudinal support frame and a transverse support frame disposed on the longitudinal support frame. The mobile vehicle body 3 is configured with a hollow structure at the position corresponding to the transverse support frame. The longitudinal connecting frame is fixedly connected to the mobile vehicle body 3, and a first lead screw nut assembly 12 is fixedly installed on its left side. A guide groove is provided on the longitudinal connecting frame at the position corresponding to the first lead screw nut assembly 12. The transverse support frame is a hollow rectangular structure, and mounting grooves are provided on the part of it parallel to the wheel arrangement direction of the mobile vehicle body 3. Two concave connecting plates 143 are also fixedly installed on the upper end surface of the support frame 141 by two locking bolts 144. Each connecting plate 143 has mounting holes at both ends corresponding to the mounting grooves on the support frame 141. A limiting rod 142 of the same size is fixedly installed in the mounting holes. An adjusting connecting piece 145 is sleeved on the middle section of each limiting rod 142.

[0030] The support assembly 1 also includes a reciprocating device 13 slidably connected to the transverse support frame. The reciprocating device 13 includes a mounting frame 131, and two adjusting connectors 145 are fixedly mounted on the upper surface of the mounting frame 131. A connecting rod is provided at one end of the mounting frame 131 near the first lead screw nut assembly 12, passing through a guide groove and connected to the transmission nut on the first lead screw nut assembly 12, so that when the transmission nut moves, it drives the mounting frame 131 to move longitudinally in the horizontal direction. A second drive motor is provided at one end of the mounting frame 131 away from the first lead screw nut assembly 12. A second lead screw nut assembly 132 is provided inside the mounting frame 131, with one end of the second lead screw nut assembly 132 connected to the second drive motor and the other end fixed. The air tightness detection device 5 is fixedly connected to the transmission nut of the second lead screw nut assembly 132 via the connector 11, with its detection end facing downwards. When the second drive motor is working, it drives the lead screw of the second lead screw nut assembly 132 to rotate, causing the transmission nut and the air tightness detection device 5 fixedly installed on it via the connector 11 to move laterally in the horizontal direction on the second lead screw nut assembly 132. Two positioning bosses are respectively provided on the left and right sides of the upper and lower end faces of the connector 11. Each positioning boss is slidably connected to a sliding connecting rod 133. The two ends of the four sliding connecting rods 133 are fixedly connected to the inner wall of the mounting frame 131 to ensure the balance of the connector 11 when it moves.

[0031] The first drive assembly 2 includes a first drive motor and a conveyor belt. The first drive motor is mounted on the moving vehicle body 3, and the conveyor belt is positioned between the output end of the drive motor and the input end of the first lead screw and nut assembly 12.

[0032] During use, firstly, the air tightness testing device for commercial vehicle AMT transmission described in this utility model is moved to an appropriate position so that the commercial vehicle AMT transmission is located in the hollow position set on the moving vehicle body 3;

[0033] Secondly, the first drive motor in the first drive assembly 2 starts to work, and drives the lead screw of the first lead screw nut assembly 12 to rotate through the conveyor belt set on its output end, which in turn drives the transmission nut set on it to move. The transmission nut drives the mounting frame 131 connected to it through the connecting rod to move longitudinally in the horizontal direction, thereby initially realizing the position adjustment. During this process, the two adjustment connecting parts 145 set on the upper surface of the mounting frame 131 slide on their corresponding limit rods 142, thereby ensuring that the mounting frame 131 will not fall off the support frame 141 during the adjustment process.

[0034] Then, the second drive motor in the reciprocating device 13 starts to work, driving the lead screw of the second lead screw nut assembly 132 to rotate, further driving the transmission nut and the airtightness detection device 5 installed on it via the connector 11 to move laterally in the horizontal direction, thereby completing the precise positioning of the airtightness detection device 5; during this process, the connector 11 moves left and right on the sliding connecting rod 133, and the four sliding connecting rods 133 can further ensure the balance of the connector 11 during the movement process;

[0035] Finally, the testing end of the air tightness testing device 5 is inserted into the oil filler port of the commercial vehicle AMT transmission, and air is pumped into the interior of the commercial vehicle AMT transmission housing through the air pump 4 and the air pipe 6 to test the air tightness inside the commercial vehicle AMT transmission.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. For those skilled in the art, modifications can be made to the specific technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions protected by this utility model.

Claims

1. A commercial vehicle AMT transmission air tightness testing device, comprising a mobile vehicle body (3), an air pump (4) mounted on the mobile vehicle body (3), and an air pipe (6) with one end sealed to the air pump (4), the other end of the air pipe (6) being sealed to an air tightness testing device (5), characterized in that: The mobile vehicle body (3) is also equipped with a support assembly (1); The support component (1) includes a limiting component (14), the limiting component (14) includes a support frame (141), the support frame (141) includes a longitudinal support frame and a transverse support frame disposed at the upper end of the longitudinal support frame; the upper end of the longitudinal support frame is provided with a first lead screw nut assembly (12), and a guide groove is provided on the longitudinal support frame at a position corresponding to the first lead screw nut assembly (12); The first lead screw nut assembly (12) is driven by the first drive assembly (2). When the first drive assembly (2) is working, it drives the first lead screw nut assembly (12) to rotate, so that the transmission nut moves longitudinally along the horizontal direction on the first lead screw nut assembly (12). A reciprocating device (13) is installed on the transverse support frame. The reciprocating device (13) includes a mounting frame (131). The mounting frame (131) is slidably connected to the transverse support frame. The mounting frame (131) can move longitudinally along the horizontal direction on the transverse support frame. The end of the mounting frame (131) near the longitudinal support frame is connected to the transmission nut of the first lead screw nut assembly (12). A second lead screw nut assembly (132) is provided on the mounting frame (131). A second drive assembly is provided at the end of the mounting frame (131) away from the longitudinal support frame. It is used to drive the lead screw of the second lead screw nut assembly (132) to rotate, so that the transmission nut of the second lead screw nut assembly (132) moves laterally along the horizontal direction. The air tightness testing device (5) is fixedly connected to the transmission nut of the second lead screw nut assembly (132) via a connector (11). Its testing end is set downwards and is used to insert into the oil filler port of the commercial vehicle AMT gearbox during testing. Air is pumped into the inside of the commercial vehicle AMT gearbox housing via an air pump (4) and an air pipe (6) to test the air tightness inside the commercial vehicle AMT gearbox.

2. The air tightness testing device for a commercial vehicle AMT transmission according to claim 1, characterized in that: The transverse support frame is a hollow rectangular structure, and the part of it parallel to the wheel arrangement direction of the mobile vehicle body (3) is provided with mounting grooves; One or more concave connecting plates (143) are fixedly installed on the upper end surface of the transverse support frame. Each connecting plate (143) has a mounting hole at both ends corresponding to the mounting groove on the transverse support frame. A limiting rod (142) of the same size is fixedly installed in the mounting hole. An adjusting connector (145) is fitted on the middle section of each limiting rod (142). The base of each adjusting connector (145) is fixedly installed on the mounting frame (131), so that when the mounting frame (131) moves longitudinally in the horizontal direction, the adjusting connector (145) installed on it moves longitudinally in the horizontal direction on the middle section of the limiting rod (142).

3. The air tightness testing device for a commercial vehicle AMT transmission according to claim 2, characterized in that: The upper and lower surfaces of the connector (11) are each provided with two positioning bosses. Each positioning boss is slidably connected with a sliding connecting rod (133). The two ends of the four sliding connecting rods (133) are fixedly connected to the inner wall of the mounting frame (131) to ensure the balance of the connector (11) when it moves.

4. The air tightness testing device for a commercial vehicle AMT transmission according to claim 3, characterized in that: Each of the limiting rods (142) has threads machined at both ends and nuts installed on them to fix the limiting rods (142) in the connecting plate (143).

5. The air tightness testing device for a commercial vehicle AMT transmission according to claim 4, characterized in that: Each of the connecting plates (143) is provided with a locking bolt (144) at the position corresponding to the transverse support frame on its upper end face, for fixing the connecting plate (143) to the support frame (141).

6. A commercial vehicle AMT transmission air tightness testing device according to any one of claims 1-5, characterized in that: The first drive assembly (2) includes a first drive motor and a conveyor belt. The first drive motor is mounted on the moving vehicle body (3), and the conveyor belt is located between the output end of the first drive motor and the input end of the first lead screw nut assembly (12). When the first drive motor is working, it drives the first lead screw nut assembly (12) to rotate through the conveyor belt, so that the transmission nut and the mounting frame (131) connected to it by the connecting rod move longitudinally along the horizontal direction on the first lead screw nut assembly (12).

7. The air tightness testing device for a commercial vehicle AMT transmission according to claim 6, characterized in that: The position of the mobile vehicle body (3) corresponding to the transverse support frame is set as a hollow structure; during the test, the mobile vehicle body (3) is moved to an appropriate position so that the commercial vehicle AMT gearbox is located in the hollow position for testing.

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