Air tightness detection device

Abstract

The utility model discloses an air tightness detection device, which particularly relates to the technical field of air tightness detection, is used for detecting the air tightness of a final transmission assembly with an oil filling port, and comprises a test tube, a gas one-way valve is arranged at one end of the test tube, and a pressure gauge is arranged on the outer surface of the test tube. A first gas rotating joint is arranged at the top of the other end of the test tube, a gas disc is arranged at one end of the first gas rotating joint, a plurality of gas outlet heads are fixedly communicated with the peripheral side of the gas disc, a second gas rotating joint is flexibly communicated with each gas outlet head, and a threaded connector is arranged at one end, opposite to the gas outlet head, of each second gas rotating joint; the threaded connector is used for being connected with an oil liquid filling port. An elastic connecting assembly is arranged on the gas rotating joint II and the gas disc; a yielding structure for pushing one threaded connector to move is arranged on the test tube; according to the utility model, the technical problem of how to quickly use a pressurization facility to be connected into the oil filling port is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to airtightness detection technical field more specifically, the utility model relates to a kind of airtightness detection device. BACKGROUND

[0002] Final transmission is the driving device of bulldozer running system, and the final transmission structure of high-power bulldozer is modular design, and the assembly part is matched, and the final transmission is assembled to the main frame of bulldozer main body structure main machine. Final transmission is a whole structure, and there are three-stage gear transmissions inside, which requires gear lubricating oil, and has strict requirements for its airtightness. In the normal operation of the bulldozer, the final transmission seal is damaged, causing oil leakage failure, which is difficult to repair and replace, causing significant economic losses.

[0003] At present, the final transmission mainly consists of a shell, a driving system, a power transmission system and a sealing system. The airtightness of the final transmission sealing system is mainly determined by the sealing elements at various positions. In order to facilitate the detection of the airtightness of the sealing elements at various positions, the existing technical means is to perform pressure treatment at the oil filling port position of the sealing system by using a pressurizing device (the current pressurizing device mainly consists of a gas pump and a connector, and the connector is used to connect the oil filling port). The airtightness is verified by referring to the standard pressure retention. However, in the actual detection process, due to the size difference of the oil filling ports of different types of final transmissions, how to quickly use the pressurizing device to connect the oil filling port is a problem to be solved at present. The existing technical means has the problem of airtightness detection connection adaptability.

[0004] Therefore, in view of the above, the present application provides an airtightness detection device to solve the problem of how to quickly use the pressurizing device to connect the oil filling port. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a technical scheme that can solve the problem of how to quickly use the pressurizing device to connect the oil filling port.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an airtightness detection device for detecting the airtightness of a final transmission assembly with an oil filling port, comprising a test tube, one end of the test tube is provided with a gas check valve, the outer surface of the test tube is provided with a pressure gauge, the top of the other end of the test tube is provided with a gas rotary joint one, one end of the gas rotary joint one is provided with a gas disc, a plurality of gas outlets are fixedly connected to the circumference of the gas disc, each gas outlet is flexibly connected to a gas rotary joint two, one end of the gas rotary joint two opposite to the gas outlet is provided with a threaded connector, and the threaded connector is used to connect the oil filling port.

[0007] The gas rotary joint two and the gas disc are provided with an elastic connecting assembly, and the test pipe is provided with a structure for giving way to move one of the threaded connectors.

[0008] In a preferred embodiment, the air joint is arranged on the end of the test pipe away from the gas one-way valve.

[0009] In a preferred embodiment, the air outlet head is provided with an on-off valve, one end of the air outlet head is fixedly connected with a spring pipe, and one end of the spring pipe is fixedly connected to the end side of the gas rotary joint one.

[0010] In a preferred embodiment, the elastic connecting assembly comprises a spring telescopic rod, the spring telescopic rod is fixedly connected to the gas disc, one end of the spring telescopic rod is fixedly connected with a traction plate, the traction plate is fixedly connected to the gas rotary joint two, a light rod is slidably connected to the traction plate, and one end of the light rod is fixedly connected to the gas disc.

[0011] In a preferred embodiment, the structure for giving way comprises a support plate, the support plate is fixedly connected to the outer surface of the test pipe, a sliding rod is slidably connected to the support plate, and one end of the sliding rod is movably connected to one of the abutting plates.

[0012] In a preferred embodiment, one end of the sliding rod is fixedly connected with a positioning column for plugging the abutting plate, a guide sliding block is rotatably connected to the top of the gas disc, and the sliding rod is slidably connected to the guide sliding block.

[0013] In a preferred embodiment, the support plate is provided with a locking structure, the locking structure comprises a bracket, the bracket is fixedly connected to the side of the support plate, a plug rod is slidably connected to the bracket, a limiting ring is fixedly connected to the outer surface of the plug rod, a compression spring is sleeved on the plug rod, the compression spring is arranged on the inner side of the bracket, and the plug rod is plugged on the sliding rod.

[0014] In a preferred embodiment, the test pipe is fixedly connected with a handle.

[0015] The technical effects and advantages of the utility model are as follows:

[0016] 1. The air tightness detection device, by setting the sealable rotation gas disc on one end of the test pipe, by setting a plurality of threaded connectors of different models on the gas disc, the oil filling port threaded connection of the final transmission assembly can meet the adaptation requirement, therefore, a plurality of threaded connectors are integrated on the test pipe, so that the final transmission assembly air tightness detection has adaptability and high detection efficiency.

[0017] 2. The air tightness detection device, through the setting of the let go structure, the elastic connection assembly and the locking structure, the elastic connection assembly can provide elastic traction for the threaded connector to facilitate movement and reset, the let go structure can be used for controlling the movement and fixation of one of the threaded connectors, under the effective stabilization of the threaded connector test position, the threaded connector position of the position can be more prominent, thereby the threaded connectors of other positions can avoid the test position, and the air tightness detection connection is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other implementation drawings can also be obtained according to the provided drawings without creative labor.

[0019] Figure 1 It is the overall structure diagram of the present application;

[0020] Figure 2 It is the test pipe structure diagram of the present application;

[0021] Figure 3 It is the structure diagram of the gas outlet, threaded connector and elastic connection assembly of the present application;

[0022] Figure 4 It is the present application Figure 1 The enlarged view of A part in the present application;

[0023] Figure 5 It is the structure diagram of the slide rod, gas rotary joint two and threaded connector of the present application.

[0024] The figure mark is: 1, test pipe; 2, gas one-way valve; 3, pressure gauge; 4, gas rotary joint one; 41, gas disc; 42, gas outlet; 5, spring pipe; 6, gas rotary joint two; 7, threaded connector; 8, elastic connection assembly; 81, spring telescopic rod; 82, traction plate; 83, polished rod; 9, let go structure; 91, support plate; 92, slide rod; 10, air joint; 11, handle; 12, on-off valve; 13, abutting plate; 14, positioning column; 15, guide sliding block; 16, locking structure; 161, support; 162, plug rod; 163, limiting ring; 164, compression spring. DETAILED DESCRIPTION

[0025] The following specific embodiments illustrate the embodiments of the present application, and those skilled in the art can easily understand other advantages and effects of the present application from the disclosed content of the specification. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] In combination with reference to Figures 1-5 The present application provides a kind of air tightness detection device, it is used to the air tightness detection of the terminal transmission assembly with oil filling port, including test tube 1.

[0027] The existing oil filling port is mainly installed and connected in the way of internal thread connection, test tube 1 can be used as compressed air delivery pipeline.

[0028] In the embodiment: test tube 1 is fixedly connected with handle 11.

[0029] Handle 11 can be conveniently hand-held test tube 1 and move.

[0030] In the embodiment: one end of test tube 1 is provided with gas check valve 2, air joint 10 is provided at the end of gas check valve 2 away from test tube 1, and pressure gauge 3 is provided on the outer surface of test tube 1.

[0031] The working principle of gas check valve 2 is to realize gas one-way flow control through the cooperation of valve core and valve seat, because gas check valve 2 is a general standard part or component known by those skilled in the art, so it will not be described in detail here, one end of air joint 10 can be connected with the output end of existing air pump through flexible pipeline, so that air pump can inject air into test tube 1 through air joint 10 and gas check valve 2 in turn, and pressure gauge 3 can be used to detect air pressure data in test tube 1.

[0032] In the embodiment: the top of the other end of test tube 1 is provided with gas rotary joint one 4, gas rotary joint one 4 is provided with air disc 41 at one end, a plurality of air outlets 42 are fixedly connected on the circumferential side of air disc 41, and switch valve 12 is provided on air outlet 42.

[0033] The gas rotary joint one 4 is specifically selected from the FAI gas rotary joint in the FEIDA series, which mainly comprises two rotating parts of an inner part and an outer part. The inner part is made of a sealing gasket material to have good sealing performance. The outer part is supported by high-strength bearings and is matched with high-quality lubricating grease to ensure stable operation for a long time. Since the gas rotary joint one 4 is a general standard part or a component known by those skilled in the art, it will not be described in more detail here. In the present application, the gas disc 41 can be sealingly connected to the test pipe 1 through the gas rotary joint one 4. In this way, the compressed air in the test pipe 1 can be pressed out through the gas disc 41 towards the air outlet head 42. The function of the on-off valve 12 is to open and close the air flow of the air outlet head 42.

[0034] In the present embodiment, each air outlet head 42 is flexibly connected to a gas rotary joint two 6. The gas rotary joint two 6 is provided with a threaded connector 7 at an end opposite to the air outlet head 42. The threaded connector 7 is used to connect the oil filling port.

[0035] In the present application, the gas rotary joint two 6 and the gas rotary joint one 4 are of the same type and principle. In the present application, a plurality of threaded connectors 7 of different specifications are provided. Specifically, when the air tightness of the oil filling port is detected, the gas disc 41 can be rotated so that one of the threaded connectors 7 on the gas disc 41 is horizontally arranged with the test pipe 1. Then, the on-off valves 12 on the other side of the threaded connectors 7 are closed. In order to facilitate the quick selection of the threaded connector 7 that is suitable for the oil filling port, the threaded connector 7 can be specifically marked with a model number. In this way, the test pipe 1 can be quickly and fixedly connected to the oil filling port through the threaded connector 7 that is suitable for the threaded specification of the oil filling port. This can solve the problem of inconvenient assembly and low adaptability caused by the size difference of the oil filling ports of different types of final transmissions when a single threaded connector 7 is used.

[0036] Then, under the action of the external air pump, the compressed air can pass through the air joint 10, the gas check valve 2, the gas rotary joint one 4, the gas disc 41, the air outlet head 42 and the threaded connector 7 in sequence. Finally, the compressed air can enter the cavity of the final transmission assembly through the oil filling port. By observing the pressure gauge 3, the air injection of the air pump is stopped when the pressure value is reached. The pressure is observed according to the pressure retention standard. If the standard is not met, soap water can be applied to the sealing connections of the final transmission assembly sealing system to find the air leakage position. In this way, the early failure of important components can be effectively avoided at the lowest cost, the failure rate is greatly reduced, and the cost of repair and maintenance of customers is reduced.

[0037] In the present embodiment, one end of the air outlet head 42 is fixedly connected to a spring tube 5. One end of the spring tube 5 is fixedly connected to the end side of the gas rotary joint one 4.

[0038] The spring tube 5 is a flexible tube shaped like a spring, so that when the threaded connector 7 adjusts the connection distance with the oil filler, the deformation of the spring tube 5 can make the compressed air in the test tube 1 effectively enter the threaded connector 7.

[0039] In the embodiment, the gas rotary joint two 6 and the gas disc 41 are provided with an elastic connection assembly 8, the elastic connection assembly 8 includes a spring telescopic rod 81, the spring telescopic rod 81 is fixedly connected to the gas disc 41, one end of the spring telescopic rod 81 is fixedly connected to a traction plate 82, the traction plate 82 is fixedly connected to the gas rotary joint two 6, and a light rod 83 is slidably connected to the traction plate 82, one end of the light rod 83 is fixedly connected to the gas disc 41.

[0040] The spring telescopic rod 81 in the application is composed of a telescopic rod and a spring sleeved on the telescopic rod, the threaded connector 7 is arranged on the rotating part of the gas rotary joint two 6, and the traction plate 82 is arranged on the fixed part of the gas rotary joint two 6, the threaded connector 7 can be sealingly and rotatably connected to the traction plate 82 through the gas rotary joint two 6, when the position of the threaded connector 7 is adjusted by moving the traction plate 82, the telescopic rod can be telescopic, the spring is in a tensile deformation state, and the traction plate 82 can slide on the light rod 83.

[0041] In the embodiment, the test tube 1 is provided with a space structure 9 for moving one of the threaded connectors 7, the space structure 9 includes a support plate 91, the support plate 91 is fixedly connected to the outer surface of the test tube 1, a sliding rod 92 is slidably connected to the support plate 91, and each gas rotary joint two 6 is fixedly connected with an abutting plate 13, one end of the sliding rod 92 is movably connected to one of the abutting plates 13.

[0042] In use, the sliding rod 92 is pushed to slide on the support plate 91, one end of the sliding rod 92 is in a palm structure, so that the sliding rod 92 can move the abutting plate 13 fixed to the fixed part of the gas rotary joint two 6, at this time, the telescopic rod is in an extended state, the spring is in a tensile deformation state, and the traction plate 82 can slide on the light rod 83, so that the threaded connector 7 on the gas rotary joint two 6 at this position can be extended outward, and the purpose of adjusting the position of the threaded connector 7 at this position is to make one of the threaded connectors 7 for connecting the oil filler farther away from the gas disc 41 than the other threaded connectors 7, so that the extended threaded connector 7 can better cooperate with the oil filler in threaded connection.

[0043] In the embodiment, one end of the sliding rod 92 is fixedly connected with a positioning column 14 for plugging the abutting plate 13, and the top of the gas disc 41 is rotatably connected with a guide sliding block 15, the sliding rod 92 is slidably connected to the guide sliding block 15.

[0044] The positioning column 14 is inserted on the abutting plate 13 to lock the threaded connector 7, so as to prevent the air disc 41 from rotating. The guide block 15 is rotatably connected to the air disc 41 through a rotating shaft. When the slide rod 92 slides through the guide block 15, the air disc 41 cannot rotate the guide block 15. The guide block 15 is arranged to provide sliding support for the middle part of the slide rod 92, so as to improve the stability of the slide rod 92.

[0045] In the embodiment, the support plate 91 is provided with a locking structure 16. The locking structure 16 comprises a support 161 fixedly connected to the side of the support plate 91. A plug rod 162 is slidably connected to the support 161. The outer surface of the plug rod 162 is fixedly connected with a limiting ring 163. A compression spring 164 is arranged on the plug rod 162 and located on the inner side of the support 161. The plug rod 162 is inserted into the slide rod 92.

[0046] In the application, the plug rod 162 can be provided with a pull rod. The pull rod can drive the plug rod 162 to move longitudinally on the support 161. When the slide rod 92 abuts against the abutting plate 13, the plug rod 162 is inserted into the slide rod 92. Similarly, the plug rod 162 is pulled downward by the pull rod. At this time, the plug rod 162 can extrude the compression spring 164 through the limiting ring 163. In this way, the plug rod 162 can be separated from the slide rod 92, so as to release the locking of the slide rod 92 on the position of the threaded connector 7.

Claims

1. An airtightness testing device for performing airtightness testing on a final drive assembly with an oil filling port, characterized in that: The utility model provides a kind of gas testing device, including test tube (1), the one end of the test tube (1) is equipped with gas one-way valve (2), the outer surface of the test tube (1) is equipped with pressure gauge (3), the top of the other end of the test tube (1) is equipped with gas rotary joint one (4), the one end of the gas rotary joint one (4) is equipped with gas disc (41), the circumferential side of the gas disc (41) is fixedly connected with multiple gas outlet head (42), each gas outlet head (42) is flexibly connected with gas rotary joint two (6), the one end of the gas rotary joint two (6) away from the gas outlet head (42) is equipped with threaded connector (7), and the threaded connector (7) is used to connect oil liquid filling mouth; The gas rotary joint two (6) and gas disc (41) are provided with an elastic connection assembly (8), and the test tube (1) is provided with a give-way structure (9) for moving one of the threaded connectors (7).

2. The air tightness detection device according to claim 1, wherein: The gas one-way valve (2) is provided with an air connector (10) away from the test tube (1).

3. The air tightness detection device according to claim 1, wherein: The gas outlet head (42) is provided with an on-off valve (12), and the one end of the gas outlet head (42) is fixedly connected with a spring tube (5).

4. The air tightness detection device according to claim 1, wherein: The elastic connection assembly (8) includes a spring telescopic rod (81), which is fixedly connected to the gas disc (41), and one end of the spring telescopic rod (81) is fixedly connected to a traction plate (82), which is fixedly connected to the gas rotary joint two (6). The traction plate (82) is slidably connected to a light rod (83), and one end of the light rod (83) is fixedly connected to the gas disc (41).

5. The air tightness detection device according to claim 1, wherein: The give-way structure (9) includes a support plate (91) fixedly connected to the outer surface of the test tube (1), and a sliding rod (92) slidably connected to the support plate (91). Each gas rotary joint two (6) is fixedly connected to an abutting plate (13), and one end of the sliding rod (92) is movably connected to one of the abutting plates (13).

6. The air tightness detection device according to claim 5, wherein: One end of the sliding rod (92) is fixedly connected to a positioning column (14) for inserting the abutting plate (13), and the top of the gas disc (41) is rotatably connected to a guide sliding block (15). The sliding rod (92) is slidably connected to the guide sliding block (15).

7. The air tightness detection device according to claim 5, wherein: The support plate (91) is provided with a locking structure (16), which includes a bracket (161) fixedly connected to the side of the support plate (91), a plug rod (162) slidably connected to the bracket (161), a limiting ring (163) fixedly connected to the outer surface of the plug rod (162), a compression spring (164) sleeved on the plug rod (162), and the compression spring (164) is arranged on the inner side of the bracket (161). The plug rod (162) is inserted into the sliding rod (92).

8. The air tightness detection device of claim 1, wherein: The test tube (1) is fixedly connected with a handle (11).

Images