Waterproof exhaust device

Abstract

The application relates to the technical field of vehicle-mounted automobile controllers, in particular to a waterproof exhaust device, which comprises a shell, a PCBA, an exhaust rod and a driving assembly. The shell is internally formed with an accommodating cavity. The PCBA is located in the accommodating cavity and is connected with the shell. The exhaust rod is movably arranged on the shell, the front end of the exhaust rod is located outside the shell, and the tail end of the exhaust rod is located in the accommodating cavity. The driving assembly comprises an electronic control valve, the electronic control valve is electrically connected with the PCBA, and the electronic control valve is connected with the tail end of the exhaust rod. The automobile controller can meet the waterproof grade, and the heat and gas generated during the working state of the automobile controller can be timely exhausted, so that the normal use of the automobile controller is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of vehicle controller technology, and in particular to a waterproof venting device. Background Technology

[0002] Electronic components, such as chips, on the internal circuit board of a car controller cannot come into contact with water. Water contact with the circuit board will damage the electronic components, causing the car controller to malfunction. Therefore, a high level of waterproofing is required. To address this, existing technologies use threaded connections and insert sealing rings at the threaded connections of the car controller to achieve a seal; or they place the assembled car controller into a mold and seal it with glue. By sealing the car controller, external moisture is prevented from entering the car controller, thus achieving the purpose of waterproofing.

[0003] However, as the temperature rises during operation of the chip and other components inside the car controller (such as the moving mechanism, which generates heat), the pressure inside the car controller also increases, so it is necessary to dissipate the heat and gas in a timely manner. Summary of the Invention

[0004] The main objective of this invention is to provide a waterproof venting device that, while meeting the waterproof rating requirements of automotive controllers, can also promptly expel the heat and gases generated during the operation of the automotive controller, thereby ensuring the normal use of the automotive controller.

[0005] To achieve the above objectives, the present invention provides a waterproof venting device, comprising:

[0006] A housing having an internal cavity;

[0007] PCBA, the PCBA is located within the receiving cavity, and the PCBA is connected to the housing;

[0008] An exhaust rod is movably inserted through the housing. The first end of the exhaust rod is located outside the housing, and the last end of the exhaust rod is located inside the receiving cavity. When the first end of the exhaust rod is away from the housing, the receiving cavity is in communication with the outside of the housing. When the first end of the exhaust rod is close to the housing, the receiving cavity is isolated from the outside of the housing.

[0009] The drive assembly includes an electronic control valve electrically connected to the PCBA and connected to the tail end of the exhaust rod. The electronic control valve drives the tail end of the exhaust rod to move up and down along the length of the exhaust rod, thereby causing the head end of the exhaust rod to move away from or towards the housing.

[0010] It can be further configured such that a water-locking cylinder is provided on the housing, and a through hole is opened inside the water-locking cylinder. The through hole is used to connect the receiving cavity with the outside of the housing. The exhaust rod is movably inserted into the water-locking cylinder. When the head end of the exhaust rod is separated from the through hole, the receiving cavity is connected to the outside of the housing; when the head end of the exhaust rod is in contact with the through hole, the receiving cavity is isolated from the outside of the housing.

[0011] The water-locking cylinder can be further configured such that it includes a venting section with a vent hole penetrating through it; wherein, when the first end of the exhaust rod approaches the water-locking cylinder and abuts against the venting section, the first end of the exhaust rod closes the vent hole, thereby isolating the vent hole from the outside of the housing; when the first end of the exhaust rod moves away from the water-locking cylinder and is separated from the venting section, the vent hole communicates with the outside of the housing.

[0012] The waterproof venting device may be further configured to include a sensing component electrically connected to the PCBA, wherein the sensing component is a pressure sensor and / or a temperature sensor; wherein the pressure sensor is used to detect the pressure inside the accommodating cavity, and the temperature sensor is used to detect the temperature inside the accommodating cavity.

[0013] It can be further configured such that an elastic element is provided at the position where the water-locking cylinder extends to the receiving cavity, one end of the elastic element abuts against the water-locking cylinder, and the other end abuts against the tail end of the exhaust rod, the elastic element causing the head end of the exhaust rod to fit and press tightly against the water-locking cylinder.

[0014] It can be further configured such that a connector is provided inside the water-locking cylinder, the connector is located inside the through hole, the first end of the connector is connected to the tail end of the exhaust rod, the tail end of the connector is connected to the electronic control valve, and the first end of the connector also abuts against the elastic element; wherein, the elastic element applies an elastic force to the connector to make the connector move away from the water-locking cylinder, thereby the connector drives the exhaust rod to move together, and the first end of the exhaust rod is pressed against the water-locking cylinder.

[0015] It can be further configured such that the portion of the water-locking cylinder located in the receiving cavity has a limiting groove along the length direction of the exhaust rod, and the connecting member has a limiting block corresponding to the position of the limiting groove. The limiting block is located within the limiting groove, wherein the movement range of the limiting block is limited within the limiting groove.

[0016] The drive assembly may be further configured such that it includes a push block connected to the electronic control valve, the push block having a slope, and the tail end of the connector abutting against the slope; wherein the electronic control valve drives the push block to extend and retract, and simultaneously, the connector moves up and down relative to the water-locking cylinder along the slope.

[0017] It can be further configured such that a guide block is slidably connected to the upper part of the pushing block, the guide block is fixedly connected to the tail end of the water-locking cylinder, and a clearance hole is opened on the guide block at the position corresponding to the tail end of the connector. The tail end of the connector is inserted into the clearance hole and moves up and down along the clearance hole.

[0018] It can be further configured such that the pushing block is provided with a sliding groove, the guide block is provided with a sliding block, the sliding block is movably inserted into the sliding groove, and when the driving electronic control valve drives the pushing block to extend and retract, the sliding block slides in the sliding groove, thereby causing the pushing block and the guide block to slide relative to each other.

[0019] The invention employs a PCBA to control an electronic control valve, which in turn drives the exhaust rod to rise and fall relative to the housing. This achieves both connection and isolation between the housing cavity and the outside of the housing. When the housing cavity is isolated from the outside of the housing, waterproofing is achieved. When the housing cavity is connected to the outside of the housing, exhaust heat dissipation is achieved, ultimately ensuring the normal operation of the vehicle controller. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the waterproof venting device of the present invention;

[0022] Figure 2 This is an exploded structural diagram of an embodiment of the waterproof venting device of the present invention;

[0023] Figure 3 This is a cross-sectional structural diagram of an embodiment of the waterproof venting device of the present invention;

[0024] Figure 4 This is a structural schematic diagram showing the ventilation section and ventilation holes in the waterproof venting device of the present invention;

[0025] Figure 5This is a schematic diagram of the limiting groove and limiting block in the waterproof venting device of the present invention;

[0026] Figure 6 This is a schematic diagram of the sliding groove and sliding block in the waterproof venting device of the present invention.

[0027] Explanation of icon numbers:

[0028] 1. Shell; 11. Receiving cavity;

[0029] 2. PCBA; 21. Sensing components;

[0030] 3. Exhaust rod; 31. Connector; 311. Limiting block;

[0031] 4. Drive assembly; 41. Electronic control valve; 42. Push block; 421. Slope; 422. Sliding groove;

[0032] 5. Water-locking cylinder; 51. Through hole; 52. Ventilation section; 521. Ventilation hole; 53. Elastic element; 54. Limiting groove;

[0033] 6. Guide block; 61. Clearance hole; 62. Sliding block.

[0034] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0036] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0037] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0038] It should be noted that the outside of the shell is the atmosphere. For ease of explanation, the term "atmosphere" will be used to refer to the "outside of the shell" in the following embodiments.

[0039] like Figures 1 to 6 As shown, the present invention proposes a waterproof venting device, comprising: a housing 1, a PCBA 2, and an venting rod 3. A receiving cavity 11 is formed inside the housing 1; the PCBA 2 is located inside the receiving cavity 11 and is connected to the housing 1; the venting rod 3 is movably inserted through the housing 1, with its head end outside the housing 1 and its tail end inside the receiving cavity 11. When the head end of the venting rod 3 is away from the housing 1, the receiving cavity 11 communicates with the outside of the housing 1; when the head end of the venting rod 3 is close to the housing 1, the receiving cavity 11 is isolated from the outside of the housing 1.

[0040] The drive assembly 4 includes an electronic control valve 41, which is electrically connected to the PCBA2 and connected to the tail end of the exhaust rod 3. The electronic control valve 41 drives the tail end of the exhaust rod 3 to move up and down along the length of the exhaust rod 3, thereby causing the head end of the exhaust rod 3 to move away from or closer to the housing 1.

[0041] Visit Figure 1 and Figure 2 The invention employs PCBA2 to control the electronic control valve 41, which in turn drives the first end of the exhaust rod 3 to rise and fall relative to the housing 1, thereby achieving both connection and isolation between the housing 11 and the atmosphere. When the housing 11 is isolated from the atmosphere, the waterproof requirement is met; when the housing 11 is connected to the atmosphere, the exhaust heat dissipation requirement is met, ultimately ensuring the normal operation of the vehicle controller.

[0042] Specifically, in this embodiment, the housing 1 includes an upper cover and a lower cover that fit together, facilitating the installation of other components. For this purpose, the exhaust rod 3 is located on the upper cover, and its length direction aligns with the direction of gravity. This facilitates installation and debugging while further enhancing the seal between the rod and the housing 1 under its own weight, improving waterproofing. The lower cover is equipped with a guide pin, which is electrically connected to the PCBA2 to supply power. The PCBA2 is fixedly mounted on the lower cover. The electronic control valve 41 is fixed to the upper cover with screws. This can be achieved by creating mounting holes around the electronic control valve 41, and using a positioning tube on the upper cover. The mounting holes and positioning tube are then connected with screws to complete the fixation.

[0043] Visit Figure 3 In other embodiments, the housing 1 may be further configured such that a water-locking cylinder 5 is provided on the housing 1, and a through hole 51 is provided inside the water-locking cylinder 5. The through hole 51 is used to connect the receiving cavity 11 with the outside of the housing 1. The exhaust rod 3 is movably inserted into the water-locking cylinder 5. When the first end of the exhaust rod 3 is separated from the through hole 51, the receiving cavity 11 is connected to the outside of the housing 1. When the first end of the exhaust rod 3 is in contact with the through hole 51, the receiving cavity 11 is isolated from the outside of the housing 1.

[0044] Specifically, the upper shell has an opening, and the water-locking cylinder 5 is inserted downwards along the opening. The shell around the opening is recessed downwards, and the inner space formed by the recess fits snugly against the head end of the water-locking cylinder 5. Furthermore, an annular groove can be provided at the corresponding recess in the shell 1, and an O-ring is installed in the annular groove. The water-locking cylinder 5 presses the O-ring tightly into the annular groove, further improving the sealing between it and the shell 1 and enhancing the waterproof effect.

[0045] Specifically, the first end of the water-locking cylinder 5 is shaped like an inverted frustum to fit the inner space of the exhaust rod 3, which increases the sealing area between it and the exhaust rod 3, further increases the sealing effect, and improves the waterproofness of the device.

[0046] Specifically, the head end of the water-locking cylinder 5 is recessed downwards at the position corresponding to the through hole 51, and the recessed inner space fits with the head end of the exhaust rod 3. In this way, when the receiving cavity 11 is isolated from the atmosphere, the sealing performance of the device can be further improved; when the receiving cavity 11 is connected to the atmosphere, the volume at the gas outlet is increased, the pressure at the gas outlet decreases, which is conducive to the rapid discharge of gas.

[0047] It should be noted that in this embodiment, the telescopic end of the electronic control valve 41 (that is, the part connected to the tail end of the exhaust rod 3) can be set in the same direction as the axial direction of the through hole 51. Thus, the position of the exhaust rod 3 relative to the water-locking cylinder 5 can be directly controlled by the electronic control valve 41, and finally the connection or isolation between the receiving cavity 11 and the atmosphere can be controlled.

[0048] Visit Figure 4In other embodiments, the water-locking cylinder 5 may be further configured to include a venting section 52, on which a venting hole 521 is provided; wherein, when the first end of the exhaust rod 3 approaches the water-locking cylinder 5 and abuts against the venting section 52, the first end of the exhaust rod 3 closes the venting hole 521, thereby isolating the venting hole 521 from the outside of the housing 1; when the first end of the exhaust rod 3 moves away from the water-locking cylinder 5 and is separated from the venting section 52, thereby communicating with the outside of the housing 1.

[0049] In this way, the volume of gas discharged from the receiving cavity 11 can be further increased through the vent 521, which is beneficial for rapid heat dissipation.

[0050] In other embodiments, the waterproof venting device may be further configured to include a sensing component 21 electrically connected to the PCBA2, wherein the sensing component 21 is a pressure sensor and / or a temperature sensor; wherein the pressure sensor is used to detect the pressure inside the receiving cavity 11, and the temperature sensor is used to detect the temperature inside the receiving cavity 11.

[0051] Thus, according to Pv=nRT, it can be known that the pressure P and temperature T in the enclosed space are inversely proportional. That is, measuring one of the values ​​can determine the other value. Therefore, when the detected temperature or pressure exceeds the critical threshold, a signal is sent to PCBA2, which in turn controls the extension or retraction of the electronic control valve 41.

[0052] Even better, a pressure sensor and a temperature sensor can be set up at the same time. When the containment cavity 11 is connected to the atmosphere, n changes and P and T are not in one-to-one correspondence. The pressure and temperature of the gas in the containment cavity 11 can be better fed back through the two sensors, and the working state of the electronic control valve 41 can be controlled more sensitively and accurately.

[0053] In other embodiments, it can be further configured such that an elastic element 53 is provided at the position where the water-locking cylinder 5 extends to the receiving cavity 11, one end of the elastic element 53 abuts against the water-locking cylinder 5, and the other end abuts against the tail end of the exhaust rod 3, so that the elastic element 53 makes the head end of the exhaust rod 3 fit and press against the water-locking cylinder 5.

[0054] Specifically, the elastic element 53 is preferably a spring, which distributes the elastic force more evenly. The elastic element 53 further presses the vent rod 3 against the water-locking cylinder 5, improving the sealing effect between the vent rod 3 and the water-locking cylinder 5, which is beneficial for waterproofing.

[0055] In other embodiments, it can be further configured such that a connector 31 is provided inside the water-locking cylinder 5, the connector 31 is located inside the through hole 51, the first end of the connector 31 is connected to the tail end of the exhaust rod 3, the tail end of the connector 31 is connected to the electronic control valve 41, and the first end of the connector 31 also abuts against the elastic member 53; wherein, the elastic member 53 applies an elastic force to the connector 31 to make the connector 31 move away from the water-locking cylinder 5, thereby the connector 31 drives the exhaust rod 3 to move together, and the first end of the exhaust rod 3 is pressed against the water-locking cylinder 5.

[0056] In this way, the connection 31 makes it easy to install the elastic element 53 inside the water-locking cylinder 5, reducing the production difficulty of the device and improving the production efficiency.

[0057] Visit Figure 5 In other embodiments, it can be further configured such that the portion of the water-locking cylinder 5 located in the receiving cavity 11 has a limiting groove 54 along the length direction of the exhaust rod 3, and the connecting member 31 is provided with a limiting block 311 at the position corresponding to the limiting groove 54. The limiting block 311 is located within the limiting groove 54, wherein the movement range of the limiting block 311 is limited within the limiting groove 54.

[0058] In this way, when the connecting piece 31 moves up and down along the water-locking cylinder 5 driven by the electronic control valve 41, it is limited. On the one hand, this prevents the electronic control valve 41 from excessively compressing the elastic element 53, which would reduce the deformation and elastic potential energy of the elastic element 53. On the other hand, it also prevents the elastic element 53 from continuously pressing against the extension section of the electronic control valve 41, and avoids stress concentration and fatigue caused by prolonged pressure, which could lead to damage. This improves the stability and lifespan of the device.

[0059] Looking back Figure 2 and Figure 3 In other embodiments, the drive assembly 4 may be further configured to include a push block 42 connected to the electronic control valve 41. The push block 42 is provided with a slope 421, and the tail end of the connector 31 abuts against the slope 421. The electronic control valve 41 drives the push block 42 to extend and retract, while the connector 31 moves up and down relative to the water-locking cylinder 5 along the slope 421.

[0060] In this way, by setting the slope 421 on the push block 42, the extension and retraction direction of the electronic control valve 41 can be changed, thereby improving the utilization rate of space.

[0061] In other embodiments, the push block 42 may be further configured such that a guide block 6 is slidably connected to the upper part of the push block 42, the guide block 6 is fixedly connected to the tail end of the water-locking cylinder 5, and a clearance hole 61 is provided on the guide block 6 at the position corresponding to the tail end of the connector 31. The tail end of the connector 31 is inserted into the clearance hole 61 and moves up and down along the clearance hole 61.

[0062] In this way, the smoothness of the movement of the tail end of the connector 31 along the slope 421 is improved.

[0063] Visit Figure 6 In other embodiments, it can be further configured such that the push block 42 is provided with a sliding groove 422 and the guide block 6 is provided with a sliding block 62. The sliding block 62 is movably inserted into the sliding groove 422. When the electronic control valve 41 drives the push block 42 to extend and retract, the sliding block 62 slides in the sliding groove 422, thereby causing the push block 42 and the guide block 6 to slide relative to each other.

[0064] Specifically, the inner space of the sliding groove 422 is rectangular, and the shape of the sliding block 62 is adapted to the inner space of the sliding groove 422. Here, in order to further improve the smoothness of the sliding when the guide block 6 slides, the length direction of the sliding groove 422 is parallel to the extension direction of the extension end of the electronic control valve 41. In this way, it is also convenient to process and control the gap between the sliding groove 422 and the sliding block 62, thereby improving the sliding accuracy.

[0065] The working principle of this embodiment:

[0066] 1S. After the entire device is installed, the receiving cavity 11 is in a closed space isolated from the atmosphere;

[0067] 2S. When the temperature sensor and / or air pressure sensor detect that the temperature or air pressure exceeds the preset critical threshold, the signal is transmitted to PCBA2;

[0068] 3S.PCBA2 receives a signal and controls the extension end of the electronic control valve 41 to pull back the push block 42. At this time, the tail of the connector 31 rises along the slope 421, simultaneously driving the exhaust rod 3 to rise, thereby venting air. (It should be noted that the gas in the receiving cavity 11 can enter through the gap between the tail end of the connector 31 and the water-locking cylinder 5, or it can enter the interior of the water-locking cylinder 5 through the limiting groove 54 and rise to the through hole 51 where the elastic element 53 is located. Venting can be carried out through the gap between the exhaust rod 3 and the water-locking cylinder 5, or through the vent hole 521.)

[0069] 4S. When the temperature sensor and / or air pressure sensor detect that the temperature or air pressure has returned to the pre-set critical threshold, the signal is transmitted to PCBA2;

[0070] 5S.PCBA2 receives a signal and then controls the extension end of the electronic control valve 41 to retract from the push block 42. At this time, the tail of the connector 31 descends along the slope 421 (under the elastic force of the spring and gravity), and at the same time drives the exhaust rod 3 to descend, so that the head end of the exhaust rod 3 fits with the head end of the water-locking cylinder 5, isolating the gas in the accommodating cavity 11 from the atmosphere, thereby closing the exhaust.

[0071] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A waterproof venting device, characterized in that, include: A housing having an internal cavity; PCBA, the PCBA is located within the receiving cavity, and the PCBA is connected to the housing; An exhaust rod is movably inserted through the housing. The first end of the exhaust rod is located outside the housing, and the last end of the exhaust rod is located inside the receiving cavity. When the first end of the exhaust rod is away from the housing, the receiving cavity is in communication with the outside of the housing. When the first end of the exhaust rod is close to the housing, the receiving cavity is isolated from the outside of the housing. A drive assembly includes an electronic control valve electrically connected to the PCBA and connected to the tail end of the exhaust rod. The electronic control valve drives the tail end of the exhaust rod to move up and down along the length of the exhaust rod, thereby causing the head end of the exhaust rod to move away from or towards the housing. The housing is provided with a water-locking cylinder, and a through hole is opened inside the water-locking cylinder. The through hole is used to connect the receiving cavity with the outside of the housing. The exhaust rod is movably inserted into the water-locking cylinder. When the head end of the exhaust rod is away from the through hole, the receiving cavity is connected to the outside of the housing; when the head end of the exhaust rod is in contact with the through hole, the receiving cavity is isolated from the outside of the housing. The water-locking cylinder also includes a venting section, on which a venting hole is formed. When the head end of the exhaust rod approaches the water-locking cylinder and abuts against the venting section, the head end of the exhaust rod closes the venting hole, thereby isolating the venting hole from the outside of the housing. When the head end of the exhaust rod moves away from the water-locking cylinder and is separated from the venting section, the venting hole communicates with the outside of the housing. The waterproof venting device further includes a sensing component electrically connected to the PCBA, wherein the sensing component is a pressure sensor and / or a temperature sensor; wherein the pressure sensor is used to detect the pressure inside the receiving cavity, and the temperature sensor is used to detect the temperature inside the receiving cavity.

2. The waterproof venting device as described in claim 1, characterized in that, An elastic element is provided at the position where the water-locking cylinder extends to the receiving cavity. One end of the elastic element abuts against the water-locking cylinder, and the other end abuts against the tail end of the exhaust rod. The elastic element causes the head end of the exhaust rod to fit and press tightly against the water-locking cylinder.

3. The waterproof venting device as described in claim 2, characterized in that, A connector is provided inside the water-locking cylinder. The connector is located inside the through hole. The first end of the connector is connected to the tail end of the exhaust rod. The tail end of the connector is connected to the electronic control valve. The first end of the connector also abuts against the elastic element. The elastic element applies an elastic force to the connector to move the connector away from the water-locking cylinder. As a result, the connector drives the exhaust rod to move together, and the first end of the exhaust rod is pressed against the water-locking cylinder.

4. The waterproof venting device as described in claim 3, characterized in that, The portion of the water-locking cylinder located in the receiving cavity has a limiting groove along the length of the exhaust rod. The connector is provided with a limiting block corresponding to the position of the limiting groove. The limiting block is located within the limiting groove, and the movement range of the limiting block is limited within the limiting groove.

5. The waterproof venting device as described in claim 2, characterized in that, The drive assembly further includes a push block connected to the electronic control valve. The push block has a slope, and the tail end of the connector abuts against the slope. The electronic control valve drives the push block to extend and retract, while the connector moves up and down relative to the water-locking cylinder along the slope.

6. The waterproof venting device as described in claim 5, characterized in that, The push block is slidably connected to a guide block, which is fixedly connected to the tail end of the water-locking cylinder. The guide block has a clearance hole at the position corresponding to the tail end of the connector. The tail end of the connector is inserted into the clearance hole and moves up and down along the clearance hole.

7. The waterproof venting device as described in claim 6, characterized in that, The push block is provided with a sliding groove, and the guide block is provided with a sliding block. The sliding block is movably inserted into the sliding groove. When the drive electronic control valve drives the push block to extend and retract, the sliding block slides in the sliding groove, thereby causing the push block and the guide block to slide relative to each other.

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