Air tightness detection equipment for bridge assembly

Abstract

The utility model discloses a bridge assembly air tightness detection device, which relates to the technical field of air tightness detection, and comprises a supporting mechanism and a detection mechanism, the supporting mechanism comprises a support, two first supporting arms are fixedly connected with two ends of the top of the support, the top end of each first supporting arm is provided with a limiting groove matched with an axle housing, and the detection mechanism is fixedly connected with the support. A second supporting arm is arranged between the two first supporting arms, and the second supporting arm is fixedly connected to one side of the support and used for supporting a speed reducer. The detection mechanism comprises a gas delivery pipe communicated with an inner cavity of the axle assembly, the gas delivery pipe is sequentially connected with a pressure regulating valve, a pressure sensor and a gas flow tester in the gas delivery direction, and the pressure regulating valve, the pressure sensor and the gas flow tester are all connected with the controller. The bridge assembly air tightness detection equipment is accurate in sealing detection result and simple and convenient in air tightness detection.

Description

Technical Field

[0001] The utility model relates to the technical field of air tightness detection, in particular to an air tightness detection device for an axle assembly. Background Art

[0002] Oil leakage in automotive axle assemblies is common due to defects such as pores, pinholes, and gaps in component joints that are difficult to detect in a timely manner. This causes significant economic losses and negative social impacts for axle manufacturers. Existing airtightness testing equipment is primarily limited to performing independent leak tests on key components.

[0003] Currently, oil leakage detection for completed axle assemblies is typically performed by injecting oil into the axle assembly and then continuously testing it for a long period of time. This method is ineffective in detecting leakage in a short period of time, resulting in many axle assemblies being discovered to have air holes, sand holes, and gaps in the joints of components only after the vehicle is in operation. This leads to frequent oil leaks, seriously affecting product quality and reliability, and causing significant economic losses.

[0004] Therefore, it is necessary to propose a bridge assembly air tightness detection device to solve the above problems. Utility Model Content

[0005] (1) Technical problems solved

[0006] The purpose of the utility model is to provide a bridge assembly air tightness detection device to solve the problem of difficulty in detecting the sealing performance of the bridge assembly proposed in the above background technology.

[0007] (2) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: an axle assembly air tightness detection device, comprising:

[0009] Support mechanism: The support mechanism includes a support, two first support arms are fixedly connected to the top ends of the support, the top ends of the first support arms are provided with a limiting groove adapted to the axle housing, a second support arm is provided between the two first support arms, and the second support arm is fixedly connected to one side of the support for supporting the reducer;

[0010] Detection mechanism: The detection mechanism includes an air supply pipe connected to the inner cavity of the axle assembly, and the air supply pipe is connected with a pressure regulating valve, a pressure sensor and a gas flow tester in sequence along the air supply direction. The pressure regulating valve, pressure sensor and gas flow tester are all connected to the controller.

[0011] Preferably, the two first support arms are symmetrically distributed on both sides of the quick threaded connector.

[0012] Preferably, the fixed position of the first support arm corresponds to the position of the circular cross-section of the bridge housing, and the limiting groove is arc-shaped.

[0013] Preferably, an elastic gasket is fixedly connected to the inner side of the limiting groove and the top end of the second support arm.

[0014] Preferably, the outer side of the bridge housing is fixedly connected with an interface communicating with the inner cavity of the bridge housing.

[0015] Preferably, an external thread is provided on the outer side of the interface, and one end of the gas pipe is sealed and connected to the interface through a quick threaded connector.

[0016] Preferably, the interface is located in the middle of the bridge housing.

[0017] Preferably, it further includes a barcode scanner, which is connected to the controller, and a device information barcode is pasted on the outside of the bridge housing.

[0018] (3) Beneficial effects

[0019] Compared with the existing technology, the present invention provides an axle assembly air tightness detection device with the following beneficial effects:

[0020] 1. The bridge assembly air tightness testing equipment is equipped with a second support arm and a first support arm. Under their joint action, it provides balanced support for the bridge housing assembly, preventing its internal components from exerting unnecessary pressure on the seal under the action of gravity, and ensuring the accuracy of the sealing test results.

[0021] 2. The bridge assembly air tightness testing equipment is equipped with a pressure regulating valve, a pressure sensor and a gas flow tester. The gas flow rate flowing through the gas pipe when the pressure is stabilized is tested by the gas flow tester. The leakage rate is calculated based on the gas flow rate to determine whether the part is qualified, making the air tightness testing easier. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional schematic diagram of the support of the utility model;

[0023] Figure 2 This is a schematic diagram of the main view of the interface of the utility model.

[0024] In the figure: 1. Limiting groove; 2. Quick threaded connector; 3. Reducer; 4. Bridge housing; 5. Support; 6. Elastic gasket; 7. Second support arm; 8. Air pipe; 9. Interface; 10. First support arm. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] See also Figure 1-2 As shown, a bridge assembly air tightness detection device includes a supporting mechanism and a detection mechanism, the vehicle axle assembly includes a reducer 3 and a bridge housing 4, the supporting mechanism includes a support 5, two first support arms 10 are fixedly connected to the top ends of the support 5, the top of the first support arm 10 is provided with a limiting groove 1 adapted to the bridge housing 4, a second support arm 7 is provided between the two first support arms 10, the second support arm 7 is fixedly connected to one side of the support 5 for supporting the reducer 3; the detection mechanism includes an air pipe 8 connected to the inner cavity of the bridge housing 4, and a pressure regulating valve, a pressure sensor and a gas flow tester are sequentially connected to the air pipe 8 along the air supply direction, and the pressure regulating valve, the pressure sensor and the gas flow tester are all connected to the controller.

[0027] The two first support arms 10 provide horizontal support for the axle housing 4, and the second support arm 7 supports the reducer 3, preventing the axle housing 4 from rotating and preventing its internal components from exerting unnecessary pressure on the seals under the action of gravity, thereby ensuring the accuracy of the sealing test results;

[0028] During the inspection, the air supply pipe 8 is connected to the air source, and compressed air is introduced into the inner cavity of the bridge housing 4 through the air supply pipe 8. When the inflation reaches the preset pressure, the inner cavity of the axle assembly is maintained at a constant pressure with the cooperation of the pressure regulating valve and the pressure sensor. The gas flow rate flowing through the air supply pipe 8 when the pressure is stabilized is tested by a gas flow tester, and the leakage rate is calculated based on the gas flow rate. If the leakage rate is within the preset range, it is judged to be a qualified part. On the contrary, if it is greater than this value, the software determines that the bridge assembly test has failed.

[0029] During pressure stabilization, the pressure sensor detects the pipeline pressure. When the pressure is lower than the preset value, the controller controls the pressure regulating valve to increase the gas flow; otherwise, the controller controls the pressure regulating valve to reduce the gas flow, so as to maintain a constant pressure in the axle assembly cavity.

[0030] In some embodiments, two first support arms 10 are symmetrically located on either side of the quick-thread connector 2. The fixed positions of the first support arms 10 correspond to the circular cross-section of the axle housing 4, and the retaining groove 1 is arc-shaped. By symmetrically distributing the two first support arms 10 on the quick-thread connector 2, the axle housing assembly is subjected to balanced forces, providing more stable support. The arc-shaped retaining groove 1 facilitates the rotation of the axle housing assembly, allowing the second support arm 7 and the first support arm 10 to jointly support it.

[0031] To prevent the paint surface of the axle housing assembly from being worn, elastic gaskets 6 are fixedly connected to the inner side of the limit groove 1 and the top of the second support arm 7. By providing the elastic gaskets 6, the paint surface of the axle housing assembly is protected and prevented from direct friction with the metal frame.

[0032] In some embodiments, a port 9 is fixedly attached to the exterior of the axle housing 4, communicating with the interior of the axle housing 4. Port 9 is externally threaded, and one end of the air pipe 8 is sealedly connected to port 9 via a quick-thread connector 2. By providing a port 9 with external threads and connecting the quick-thread connector 2, which matches port 9, to the end of the air pipe 8, the connection between the air pipe 8 and the axle housing assembly is simplified, improving operational efficiency. Preferably, port 9 is located in the middle of the axle housing 4 to help maintain air pressure balance at both ends.

[0033] In some embodiments, a barcode scanner is also included, connected to a controller. A barcode is affixed to the exterior of the axle housing 4. Before testing, the device information barcode on the exterior of the axle housing 4 is scanned with the scanner to obtain the device number. After the airtightness test is completed, the device number is associated with the test value and stored in the device controller's database for easy data traceability. The controller can be a computer or a conventional control device.

[0034] The gas flow tester adopts the D670 computer flow tester from ATEQ, and the quick threaded connector 2 adopts an existing connector that is compatible with the external thread of the interface 9 .

[0035] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bridge assembly air tightness detection device, characterized in that: include: Support mechanism: The support mechanism includes a support (5), two first support arms (10) are fixedly connected to the top ends of the support (5), a limiting groove (1) adapted to the bridge housing (4) is provided at the top of the first support arm (10), a second support arm (7) is provided between the two first support arms (10), and the second support arm (7) is fixedly connected to one side of the support (5) for supporting the reducer (3); Detection mechanism: The detection mechanism includes an air supply pipe (8) connected to the inner cavity of the vehicle axle assembly, and the air supply pipe (8) is connected to a pressure regulating valve, a pressure sensor and a gas flow tester in sequence along the air supply direction, and the pressure regulating valve, pressure sensor and gas flow tester are all connected to the controller.

2. The axle assembly air tightness testing device according to claim 1, characterized in that: The two first support arms (10) are symmetrically distributed on both sides of the quick threaded connector (2).

3. The axle assembly air tightness testing device according to claim 1, characterized in that: The fixed position of the first support arm (10) corresponds to the position of the circular cross-section of the bridge housing (4), and the limiting groove (1) is arc-shaped.

4. The axle assembly air tightness testing device according to claim 1, characterized in that: The inner side of the limiting groove (1) and the top end of the second support arm (7) are both fixedly connected with an elastic gasket (6).

5. The axle assembly air tightness testing device according to claim 1, characterized in that: An interface (9) communicating with the inner cavity of the bridge housing (4) is fixedly connected to the outer side of the bridge housing (4).

6. The axle assembly air tightness testing device according to claim 5, characterized in that: The outer side of the interface (9) is provided with an external thread, and one end of the gas pipe (8) is sealedly connected to the interface (9) via a quick threaded connector (2).

7. The axle assembly air tightness testing device according to claim 5, characterized in that: The interface (9) is located in the middle of the bridge housing (4).

8. The axle assembly air tightness testing device according to claim 1, characterized in that: It also includes a barcode scanner, which is connected to the controller, and a device information barcode is pasted on the outside of the bridge housing (4).

Images