Rear shell gas leak detection machine

Abstract

The utility model relates to the technical field of automobile parts, in particular to a rear shell gas leak detection machine which comprises a support, an upper die mechanism and a lower die mechanism, the upper die mechanism and the lower die mechanism are fixed at the upper end and the lower end of the support and used for pressing a rear shell to conduct gas tightness detection, and the lower die mechanism comprises a lower pressing die plate, a gas inlet assembly and an internal expansion plugging assembly. The lower pressing template is connected with a mold filling body matched with the rear shell, the air inlet assemblies are arranged on the two sides of the mold filling body in parallel, and air inlets of the air inlet assemblies are located in the bottom of the mold filling body; the internal expansion plugging assembly is located on the right side of the mold filling body and matched with an opening in the side portion of the rear shell. The support is connected with a driving source, and the upper die mechanism and the lower die mechanism are driven by the driving source to be closed. According to the utility model, errors caused by manual operation can be effectively reduced, and the labor force of workers is reduced, so that the detection efficiency and accuracy of the gearbox rear shell are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to a rear housing gas leak detector. Background Art

[0002] The gearbox is the core component of the automobile transmission system, and its air tightness has an important impact on vehicle performance. The gearbox housing is the carrier of the entire gearbox, and there are multiple oil channels on it that provide channels for hydraulic pressure and lubrication. In order to ensure the strict sealing of the housing oil channels, the housing needs to be tested for sealing (i.e. leak testing) before assembly. At present, the commonly used sealing testing methods in the industry are air tightness testing and liquid tightness testing, and air tightness testing is more widely used because of the convenient acquisition of gas media; during air tightness testing, each open end of the oil channel needs to be effectively blocked before inflation measurement can be performed.

[0003] The traditional method of testing the air tightness of the rear housing of the gearbox usually uses manual operation for sealing, which results in a slow detection speed and is easily affected by human factors, resulting in inaccurate detection results. At the same time, during the air intake process, inflation is generally carried out at the top or side of the rear housing, and there are many openings on the top and sides of the rear housing, which are prone to leakage during the inflation process, thus affecting the accuracy of the test results.

[0004] Therefore, a device is needed that can quickly and accurately complete the air tightness detection of the rear housing of the gearbox. Utility Model Content

[0005] In order to solve the technical defects raised in the above-mentioned background technology, the purpose of the utility model is to provide a pressing device for a rear shell gas leak detector, aiming to solve the problem that when manually performing airtightness detection on the rear shell in the prior art, it is easily affected by human factors, resulting in inaccurate detection results, so that it can quickly and accurately complete the airtightness detection of the rear shell of the gearbox.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A rear shell gas leak detector comprises a bracket, an upper mold mechanism and a lower mold mechanism fixed at the upper and lower ends of the bracket, the upper mold mechanism and the lower mold mechanism are used for pressing the rear shell for airtightness detection, and is characterized in that the lower mold mechanism comprises a lower pressing plate, an air intake assembly and an inner expansion sealing assembly, the lower pressing plate is connected with a mold filling body adapted to the rear shell, the air intake assembly is arranged parallel to the two sides of the mold filling body, and the air intake of the air intake assembly is located at the bottom of the mold filling body; the inner expansion sealing assembly is located on the right side of the mold filling body, and the inner expansion sealing assembly is adapted to the opening on the side of the rear shell; the bracket is connected with a driving source, and when the upper mold mechanism and the lower mold mechanism are closed under the driving action of the driving source, the inner expansion sealing assembly seals the opening on the side of the rear shell, and inflates the rear shell through the external air source of the air intake assembly to achieve airtightness detection.

[0008] Preferably, the air intake assembly includes an air pipe joint, an air pipe and a sealing ring seat, the air pipe is arranged in the lower pressure mold plate, and one end of the air pipe extends to the side of the lower pressure mold plate and is connected to the air pipe joint, and the other end is connected to the sealing ring seat, the air pipe joint is connected to an external air source, the sealing ring seat is fixed on the lower pressure mold plate, and the sealing ring seat is located at the center of the cavity of the rear shell body, and a plurality of air intake holes are opened on the sealing ring seat, and the air intake holes are connected to the air pipe.

[0009] Preferably, the internal sealing assembly includes an internal expansion guide seat, an internal expansion tightening guide rod and a centering rod, the internal expansion tightening guide rod and the centering rod are respectively connected to the two ends of the internal expansion guide seat, and the internal expansion guide seat is sequentially provided with an internal expansion top block, an internal expansion movable guide rod and a compression spring, the internal expansion top block is filled to one end of the opening of the internal expansion guide seat, and one end of the internal expansion top block is connected to the centering rod, and the other end is fixedly connected to the internal expansion movable guide rod, the end of the internal expansion movable guide rod away from the internal expansion top block is connected to the compression spring, and a limiting pin is inserted at the connection between the internal expansion movable guide rod and the compression spring.

[0010] Preferably, a plurality of lifting blocks and leveling pads are provided at the edge connection between the mold filling body and the lower pressure template. The lifting blocks and leveling pads are embedded and connected in the lower pressure template. The lifting blocks are used to lift the mold filling body for easy replacement, and the leveling pads are used to quickly fix the mold filling body.

[0011] Preferably, a plurality of fool-proof blocks for protection are arranged on the lower pressing template around the mold filling body, and the fool-proof blocks are arranged at the same height as the mold filling body.

[0012] Preferably, the upper mold mechanism includes an upper pressing plate, a pressure rod assembly and an oil channel sealing assembly. A plurality of mounting holes are opened on the upper pressing plate at the pressing position corresponding to the rear shell body. The pressure rod assembly is located at the bottom end of the upper mold pressing plate, and one end of the pressure rod assembly is connected to the mounting hole. The oil channel sealing assembly is used to seal the hydraulic oil channel in the upper mold mechanism, and the oil channel sealing assembly is arranged on the outer edge of the pressure rod assembly.

[0013] Preferably, the pressure rod assembly includes a pressure rod mounting seat, a pressure rod and a pressure head, one end of the pressure rod mounting seat is fixedly connected to the upper pressure plate, the pressure rod is inserted into the pressure rod mounting seat, and a compression spring is sleeved on the outer side of the pressure rod; the pressure head is threadedly connected to the bottom end of the pressure rod.

[0014] Preferably, the oil channel plugging assembly includes a plugging fixing seat, a reinforcing rib and a planar plug, one end of the plugging fixing seat is fixedly connected to the upper pressure plate, and the other end is connected to the planar plug, the reinforcing rib is vertically fixed to the inner wall of the plugging fixing seat, and the planar plug is arranged toward one side of the pressure rod.

[0015] In summary, the beneficial effects of the utility model are:

[0016] The utility model arranges the air inlet of the air inlet assembly at the middle position of the bottom end of the rear shell body, so as to avoid leakage during the inflation process, and utilizes the internal expansion sealing assembly to automatically and quickly seal the rear shell body, so as to reduce errors caused by manual operation and reduce the labor of workers, thereby improving the detection efficiency and accuracy of the rear shell body of the gearbox. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the rear shell gas leak detector of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the upper die mechanism in the utility model;

[0019] Figure 3 It is a structural schematic diagram of the middle and lower mold mechanism of the utility model;

[0020] Figure 4 It is a top view of the lower die mechanism of the utility model;

[0021] Figure 5 It is a cross-sectional view of the internal expansion plugging component in the utility model.

[0022] Description of reference numerals in the figures:

[0023] 1. Upper die mechanism; 11. Upper pressing plate; 111. Mounting hole; 12. Press rod assembly; 121. Press rod mounting seat; 122. Press rod; 123. Press head; 124. Compression spring; 13. Oil channel plugging assembly; 131. Blocking fixing seat; 132. Reinforcement rib; 133. Plane plug; 2. Lower die mechanism; 21. Lower pressing plate; 211. Mold filling body; 22. Air intake assembly; 221 , trachea joint; 222, trachea; 223, sealing ring seat; 224, air inlet hole; 23, internal expansion plugging assembly; 231, internal expansion guide seat; 232, internal expansion tightening guide rod; 233, centering rod; 234, internal expansion top block; 235, internal expansion movable guide rod; 236, compression spring; 237, limit pin; 3, lifting block; 4, leveling pad; 5, anti-fool block; 6, rear shell; 7, bracket. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0025] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0026] In the description of the utility model, if there is a word description such as "several", it means one or more, and the meaning of "more" is two or more. Greater than, less than, and more than are understood to exclude the number itself, and above, below, and within are understood to include the number itself. If there is a description of the first, second, and third, it is only used to distinguish the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0027] The following is combined with Figure 1-5 , an embodiment of a rear shell gas leak detector of the utility model is further described in detail.

[0028] A rear housing gas leak detector, such as Figure 1 , 2As shown, it includes a bracket 7 (not shown in the figure), an upper mold mechanism 1 and a lower mold mechanism 2 fixed at the upper and lower ends of the bracket 7 (not shown in the figure), the upper mold mechanism 1 and the lower mold mechanism 2 are used to press the rear shell 6 for air tightness detection, the lower mold mechanism 2 includes a lower pressing plate 21, an air intake assembly 22 and an inner expansion plugging assembly 23, the lower pressing plate 21 is connected with a mold filling body 211 adapted to the rear shell 6, the air intake assembly 22 is arranged parallel to both sides of the mold filling body 211, and the air intake of the air intake assembly 22 is located at the bottom of the mold filling body 211; the inner expansion plugging assembly 23 is located on the right side of the mold filling body 211, and the inner expansion plugging assembly 23 is adapted to the opening on the side of the rear shell 6; a driving source is connected to the bracket 7, when the upper mold mechanism 1 and the lower mold mechanism 2 are closed under the driving action of the driving source, the inner expansion plugging assembly 23 blocks the opening on the side of the rear shell 6, and inflates the rear shell 6 through the external air source of the air intake assembly 22 to achieve air tightness detection.

[0029] Specifically, in order to quickly perform air tightness detection on the rear housing 6 of the gearbox and reduce manual intervention, the utility model adopts the method of combining the upper mold mechanism 1 and the lower mold mechanism 2 to provide a relatively sealed detection environment for the rear housing 6, and uses the internal expansion sealing component 23 on the lower mold mechanism 2 to tightly seal the side opening of the rear housing 6, and at the same time, by setting the air intake component 22 at the bottom end of the mold filling body 211, it is avoided that it leaks during the inflation process; wherein, the lower pressure template 21 is composed of a base plate and a padding block, the padding block is used to increase the height of the base plate to avoid being affected by other equipment when it is working, and the air intake component 22 is externally connected to an air source, and the air source adopts an air compressor to provide gas through compressed air.

[0030] It is worth noting that the upper mold mechanism 1 is movably connected to the top end of the bracket 7 (not shown in the figure), the lower mold mechanism 2 is fixed to the bottom end of the bracket 7 (not shown in the figure), and the driving source adopts a lifting cylinder, which is installed on the bracket 7 (not shown in the figure), and the output end of the lifting cylinder is transmission-connected to the upper mold mechanism 1. Driven by the lifting cylinder, the upper mold mechanism 1 can be lifted and lowered along the bracket 7 (not shown in the figure), thereby realizing mold closing or demolding with the lower mold mechanism 2.

[0031] In this embodiment, if Figure 2As shown, the upper mold mechanism 1 includes an upper pressing plate 11, a pressure rod assembly 12 and an oil channel plugging assembly 13. A plurality of mounting holes 111 are provided at the pressing position of the upper pressing plate 11 corresponding to the rear shell 6. The pressure rod assembly 12 is located at the bottom end of the upper mold pressing plate, and one end of the pressure rod assembly 12 is connected to the mounting hole 111. The oil channel plugging assembly 13 is used to plug the hydraulic oil channel in the upper mold mechanism 1, and the oil channel plugging assembly 13 is arranged on the outer edge of the pressure rod assembly 12; the pressure rod assembly 12 includes a pressure rod mounting seat 121, a pressure rod 122 and a pressure head 123, one end of the pressure rod mounting seat 121 is fixedly connected to the upper pressing plate 11, the pressure rod 122 is inserted into the pressure rod mounting seat 121, and a compression spring 124 is sleeved on the outer side of the pressure rod 122; the pressure head 123 is threadedly connected to the bottom end of the pressure rod 122.

[0032] Specifically, when the upper mold mechanism 1 is pressing the rear shell 6, its pressure rod assembly 12 will correspond to the pressing hole position on the rear shell 6, wherein the compression spring 124 arranged on the outer side of the pressure rod 122 allows the upper mold mechanism 1 to produce a certain amount of deformation during mold closing and control it within a normal deformation range. At the same time, the pressure head 123 is installed on the pressure rod 122 in a threaded connection manner, so that the pressure head 123 can be replaced according to the size of the rear shell 6, thereby improving the practicality of the pressure rod assembly 12.

[0033] In this embodiment, the oil channel plugging assembly 13 includes a plugging fixing seat 131, a reinforcing rib 132 and a planar plug 133. One end of the plugging fixing seat 131 is fixedly connected to the upper pressure plate 11, and the other end is connected to the planar plug 133. The reinforcing rib 132 is vertically fixed on the inner wall of the plugging fixing seat 131, and the planar plug 133 is arranged toward the side of the pressure rod 122.

[0034] Specifically, when the oil channel on the rear housing 6 is blocked, the flat plug 133 is used to block the oil channel holes respectively; obviously, the shape of the flat plug 133 should match the shape of the oil channel hole to be blocked, so that the oil channel hole can be completely blocked and the blocking performance can be improved. The blocking fixing seat 131 is designed to enable the flat plug 133 to be quickly installed. A mounting hole 111 is provided at the bottom end of the blocking fixing seat 131, and the flat plug 133 is plugged into the mounting hole 111. The reinforcing rib 132 is fixed to the inner wall of the blocking fixing seat 131 by screws to improve the stability of the blocking fixing seat 131.

[0035] In this embodiment, if Figure 3 , 4As shown, the air intake assembly 22 includes an air pipe joint 221, an air pipe 222 and a sealing ring seat 223. The air pipe 222 is arranged in the lower pressure template 21, and one end of the air pipe 222 extends to the side of the lower pressure template 21 and is connected to the air pipe joint 221, and the other end is connected to the sealing ring seat 223. The air pipe joint 221 is connected to an external air source, and the sealing ring seat 223 is fixed on the lower pressure template 21, and the sealing ring seat 223 is located at the center of the cavity of the rear shell body 6. A plurality of air intake holes 224 are opened on the sealing ring seat 223, and the air intake holes 224 are connected to the air pipe 222.

[0036] Specifically, in order to prevent air leakage during the detection process, the air pipe joint 221 is installed at 90° on the two side walls of the lower pressure template 21, and the air pipe 222 is hidden in the lower pressure template 21, which saves space and shortens the distance with the sealing ring seat 223. The sealing ring seat 223 is arranged at the bottom center of the two cavities of the rear shell body 6, and a plurality of air inlet holes 224 are opened on the sealing ring seat 223 to increase the air intake speed and improve the efficiency of the fast air tightness detection.

[0037] In this embodiment, if Figure 5 As shown, the internal sealing assembly includes an internal expansion guide seat 231, an internal expansion tightening guide rod 232 and a centering rod 233. The internal expansion tightening guide rod 232 and the centering rod 233 are respectively connected to the two ends of the internal expansion guide seat 231. The internal expansion guide seat 231 is sequentially provided with an internal expansion top block 234, an internal expansion movable guide rod 235 and a compression spring 236. The internal expansion top block 234 fills one end of the opening of the internal expansion guide seat 231, and one end of the internal expansion top block 234 is connected to the centering rod 233, and the other end is fixedly connected to the internal expansion movable guide rod 235. The end of the internal expansion movable guide rod 235 away from the internal expansion top block 234 is connected to the compression spring 236, and a limiting pin 237 is inserted at the connection between the internal expansion movable guide rod 235 and the compression spring 236.

[0038] Specifically, when the opening on the side of the rear shell body 6 is blocked, the internal blocking component equipotentially arranged on one side of the rear shell body 6 drives the internal expansion movable guide rod 235 to overcome the elastic force of the compression spring 236 to push out the internal expansion top block 234 through the internal expansion tightening guide rod 232. At the same time, the limit pin 237 inserted at the connection between the internal expansion movable guide rod 235 and the compression spring 236 limits the extension distance of the internal expansion movable guide rod 235, thereby accurately controlling the internal expansion top block 234 to push the centering rod 233 into the corresponding opening on the side of the rear shell body 6, thereby blocking the opening on the side of the rear shell body 6. After the blocking is completed, the compression spring 236 returns to its original position under its own elastic force, and at the same time drives the internal expansion top block 234 to retract, so that the centering rod 233 withdraws from the opening on the side of the rear shell body 6.

[0039] In this embodiment, a plurality of lifting blocks 3 and leveling pads 4 are provided at the edge connection between the mold filling body 211 and the lower pressure template 21. The lifting blocks 3 and the leveling pads 4 are embedded and connected in the lower pressure template 21. The lifting blocks 3 are used to lift the mold filling body 211 for easy replacement, and the leveling pads 4 are used to quickly fix the mold filling body 211.

[0040] Specifically, in order to install the mold filling body 211 on the lower pressure template 21 more quickly and easily, a plurality of lifting blocks 3 and leveling pads 4 are arranged at the edge connection between the mold filling body 211 and the lower pressure template 21. The leveling pads 4 can help the mold filling body 211 to be quickly positioned with the lower pressure template 21 and ensure a stable state during the installation process. The lifting blocks 3 are arranged so that when the mold filling body 211 is disassembled and assembled, the mold filling body 211 can be ejected by the lifting action of the lifting blocks 3, thereby reducing manual violent disassembly and avoiding damage to the mold filling blocks.

[0041] In this embodiment, a plurality of fool-proofing blocks 5 for protection are arranged around the mold filling body 211 on the lower pressing plate 21 , and the fool-proofing blocks 5 are arranged at the same height as the mold filling body 211 .

[0042] Specifically, the purpose of setting the fool-proof block 5 is to play a preventive and corrective behavioral restraint means, using a limiting method to avoid errors, in order to prevent the gas leak detector from being in working state, so that the operator can directly and accurately complete the correct operation without paying attention, experience and professional knowledge. At the same time, it can also prevent the user's operating errors from causing machine or personal injury (including unconscious actions or subconscious misoperations or careless body movements), and there will be preventive measures for these possible situations, so as to protect the operator's personal safety and equipment damage.

[0043] The working principle of this utility model:

[0044] During the process of testing the air tightness of the rear shell 6, the pressed rear shell 6 is placed on the mold filling, and then the opening on the side of the rear shell 6 is blocked by the conical blocking block arranged on the lower pressing plate 21 and the inner expansion blocking assembly 23 located on the side of the rear shell 6, and the inner expansion tightening guide rod 232 drives the inner expansion movable guide rod 235 to overcome the elastic force of the compression spring 236 to push out the inner expansion ejecting block 234, thereby pushing the centering rod 233 into the corresponding opening to achieve the blocking of the side opening of the rear shell 6; then the upper The mold mechanism 1 and the lower mold mechanism 2 are molded together, so that the pressure rod assembly 12 fits with the stamping hole on the outer surface of the rear shell body 6, and the oil channel sealing assembly 13 seals the oil channel hole of the rear shell body 6. In this way, the oil channel sealing assembly 13 is used to seal multiple connected oil channels on the rear shell body 6, so that the rear shell body 6 is in a sealed environment; finally, the rear shell body 6 is inflated and tested by the inflation assembly arranged inside the mold filling body 211, so that it can quickly and accurately complete the air tightness test of the gearbox rear shell body 6.

[0045] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A rear housing gas leak detector, comprising a bracket, an upper mold mechanism and a lower mold mechanism fixed at the upper and lower ends of the bracket, wherein the upper mold mechanism and the lower mold mechanism are used to press the rear housing to perform airtightness detection, and is characterized in that: The lower mold mechanism includes a lower pressure template, an air intake assembly and an inner expansion sealing assembly. The lower pressure template is connected to a mold filling body adapted to the rear shell body. The air intake assembly is arranged parallel to both sides of the mold filling body, and the air inlet of the air intake assembly is located at the bottom of the mold filling body; the inner expansion sealing assembly is located on the right side of the mold filling body, and the inner expansion sealing assembly is adapted to the opening on the side of the rear shell body; the bracket is connected to a driving source, and when the upper mold mechanism and the lower mold mechanism are closed under the driving action of the driving source, the inner expansion sealing assembly seals the opening on the side of the rear shell body, and inflates the rear shell body through the external air source of the air intake assembly to achieve air tightness detection.

2. The rear housing gas leak detector according to claim 1, characterized in that: The air intake assembly includes an air pipe joint, an air pipe and a sealing ring seat. The air pipe is arranged in the lower pressure mold plate, and one end of the air pipe extends to the side of the lower pressure mold plate and is connected to the air pipe joint, and the other end is connected to the sealing ring seat. The air pipe joint is connected to an external air source. The sealing ring seat is fixed on the lower pressure mold plate, and the sealing ring seat is located at the center of the cavity of the rear shell body. A plurality of air intake holes are opened on the sealing ring seat, and the air intake holes are connected to the air pipe.

3. The rear housing gas leak detector according to claim 2, characterized in that: The internal expansion sealing assembly includes an internal expansion guide seat, an internal expansion tightening guide rod and a centering rod, the internal expansion tightening guide rod and the centering rod are respectively connected to the two ends of the internal expansion guide seat, the internal expansion guide seat is sequentially provided with an internal expansion top block, an internal expansion movable guide rod and a compression spring, the internal expansion top block is filled to one end of the opening of the internal expansion guide seat, and one end of the internal expansion top block is connected to the centering rod, and the other end is fixedly connected to the internal expansion movable guide rod, the end of the internal expansion movable guide rod away from the internal expansion top block is connected to the compression spring, and a limited position pin is inserted at the connection between the internal expansion movable guide rod and the compression spring.

4. The rear housing gas leak detector according to claim 3, characterized in that: A plurality of lifting blocks and leveling pads are provided at the edge connection between the mold filling body and the lower pressure template. The lifting blocks and leveling pads are embedded and connected in the lower pressure template. The lifting blocks are used to lift the mold filling body for easy replacement, and the leveling pads are used to quickly fix the mold filling body.

5. The rear housing gas leak detector according to claim 4, characterized in that: A plurality of fool-proof blocks for protection are arranged on the lower pressing template around the mold filling body, and the fool-proof blocks are arranged at the same height as the mold filling body.

6. The rear housing gas leak detector according to claim 5, characterized in that: The upper mold mechanism includes an upper pressing plate, a pressure rod assembly and an oil channel plugging assembly. A plurality of mounting holes are provided on the upper pressing plate at the pressing position corresponding to the rear shell body. The pressure rod assembly is located at the bottom end of the upper mold pressing plate, and one end of the pressure rod assembly is connected to the mounting hole. The oil channel plugging assembly is used to plug the hydraulic oil channel in the upper mold mechanism, and the oil channel plugging assembly is arranged on the outer edge of the pressure rod assembly.

7. The rear housing gas leak detector according to claim 6, characterized in that: The pressure rod assembly includes a pressure rod mounting seat, a pressure rod and a pressure head. One end of the pressure rod mounting seat is fixedly connected to the upper pressure plate, the pressure rod is inserted into the pressure rod mounting seat, and a pressure spring is sleeved on the outer side of the pressure rod; the pressure head is threadedly connected to the bottom end of the pressure rod.

8. The rear housing gas leak detector according to claim 7, characterized in that: The oil channel plugging assembly includes a plugging fixing seat, a reinforcing rib and a flat plug. One end of the plugging fixing seat is fixedly connected to the upper pressure plate, and the other end is connected to the flat plug. The reinforcing rib is vertically fixed to the inner wall of the plugging fixing seat, and the flat plug is arranged toward one side of the pressure rod.

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