Buffer mechanism for air tightness detection equipment

Abstract

The utility model discloses a buffer mechanism used on air tightness detection equipment, the buffer mechanism is fixedly connected with one end of a piston rod of a cylinder, the buffer mechanism comprises a fixed plate, a connecting rod, an elastic assembly and a connecting assembly, the elastic assembly is located between the fixed plate and the connecting assembly, and the connecting rod is connected with the elastic assembly. The connecting rod is connected with one end of the connecting assembly, the connecting assembly can move back and forth in the length direction of the connecting rod, one end of the connecting rod is fixedly connected with the fixing plate, and the connecting rod is sleeved with the elastic assembly. According to the buffering mechanism, the elastic assembly and the connecting assembly are additionally arranged between the fixing plate and the piston rod of the air cylinder, when the fixing plate is in complete contact with the sealing face of a product, redundant thrust output by the air cylinder can be absorbed through deformation of the elastic piece in the elastic assembly, and the buffering effect on the product is achieved; product damage caused by high air inlet speed of the air cylinder can be prevented, the sealing performance can be ensured, and finally the sealing performance detection of the product by the air tightness detection equipment is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of air tightness detection equipment, and in particular relates to a buffer mechanism used on air tightness detection equipment. Background Art

[0002] The intake manifold is located between the throttle and the engine intake valve, and is used to guide air into each cylinder. Therefore, the sealing of the intake manifold is particularly important. With the development of the automotive industry, in order to reduce weight, more and more companies use intake manifolds made of plastic, which require multiple bolt holes for mounting bolts. The bolt holes are usually formed by inserting threaded metal parts into the intake manifold. Hot or cold insertion can be selected, but there may be airtightness problems after the metal parts are inserted into the intake manifold. If the airtightness between the metal parts and the intake manifold is poor, it will affect the safety of the intake manifold.

[0003] Therefore, it is necessary to test the air tightness between the metal parts and the intake manifold. The air tightness testing equipment currently used is to fix the metal contoured plugging block directly on the cylinder piston rod. When the cylinder is inflated, the piston rod moves forward. The speed at which the piston rod moves forward is completely determined by the intake speed. If the intake speed is too fast, it will cause product damage; if the intake speed is too slow, it will affect the sealing effect, and the intake speed needs to be adjusted before each use, which is cumbersome. Utility Model Content

[0004] In view of this, in order to solve the problems of the prior art, the utility model provides a buffer mechanism for air tightness detection equipment, which can prevent the cylinder from damaging the product due to the fast air intake speed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A buffer mechanism for an air tightness detection device, the buffer mechanism is fixedly connected to one end of a piston rod of a cylinder, the buffer mechanism comprises a fixed plate, a connecting rod, an elastic component and a connecting component, the elastic component is located between the fixed plate and the connecting component, the connecting rod is connected to one end of the connecting component and the connecting component can move back and forth along the length direction of the connecting rod, one end of the connecting rod is fixedly connected to the fixed plate, and the elastic component is sleeved on the outer circumference of the connecting rod.

[0007] According to some preferred implementation aspects of the utility model, the elastic component includes an elastic member and a fixing sleeve, the elastic member is sleeved outside the end of the connecting rod close to the fixing plate, and one end of the fixing sleeve is fixedly connected to one side of the fixing plate.

[0008] According to some preferred implementation aspects of the utility model, the interior of the fixing sleeve has a cavity, part of the elastic member is located in the cavity, the remaining part of the elastic member is located outside the cavity, and one end of the elastic member abuts against the inner wall of one end of the fixing sleeve close to the fixing plate.

[0009] According to some preferred implementation aspects of the utility model, the connecting assembly includes a first connecting plate, a second connecting plate and a support rod for fixedly connecting the first connecting plate and the second connecting plate, the first connecting plate is parallel to the second connecting plate, and the support rod is perpendicular to the first connecting plate.

[0010] According to some preferred implementation aspects of the present invention, there is a gap between the first connecting plate and the second connecting plate, the first connecting plate is close to the fixed plate, and one end of the connecting rod away from the fixed plate passes through the thickness direction of the first connecting plate.

[0011] According to some preferred implementation aspects of the utility model, a locking piece is provided at one end of the connecting rod away from the fixing plate, and the end of the elastic piece away from the fixing plate abuts against a side of the first connecting plate away from the second connecting plate. The locking piece can ensure that the first connecting plate will not fall off the connecting rod, thereby ensuring that the elastic piece can always be between the first connecting plate and the inner wall of the end of the fixing sleeve close to the fixing plate.

[0012] According to some preferred implementation aspects of the utility model, the buffer mechanism has a first state and a second state. When the buffer mechanism is in the first state, there is a gap between one end of the connecting rod away from the fixed plate and one side of the second connecting plate close to the first connecting plate; when the buffer mechanism is in the second state, one end of the connecting rod away from the fixed plate abuts against one side of the second connecting plate close to the first connecting plate.

[0013] According to some preferred implementation aspects of the utility model, when the buffer mechanism is in the first state, the gap between the end of the connecting rod away from the fixed plate and the side of the second connecting plate close to the first connecting plate is smaller than the distance between the end of the fixing sleeve away from the fixed plate and the side of the first connecting plate away from the second connecting plate. When the piston rod of the cylinder extends outward to push the entire buffer mechanism forward, the first connecting plate will continuously compress the elastic member until the end of the connecting rod provided with the locking member abuts against the second connecting plate, at which time the maximum movement stroke of the elastic member is reached. When the piston rod continues to extend outward, it will only drive the buffer mechanism as a whole forward, and the first connecting plate will no longer compress the elastic member.

[0014] According to some preferred implementation aspects of the utility model, one end of the piston rod is fixedly connected to the second connecting plate, and the connecting rod is parallel to the piston rod.

[0015] According to some preferred implementation aspects of the present invention, a support block is further included, and the support block is located below the connecting assembly, and the support block is used to support the connecting assembly.

[0016] Compared with the prior art, the utility model is advantageous in that: a buffer mechanism for airtightness testing equipment of the utility model adds an elastic component and a connecting component between the fixed plate and the cylinder piston rod. When the fixed plate is in full contact with the sealing surface of the product, the deformation of the elastic part in the elastic component can absorb the excess thrust output by the cylinder, thereby buffering the product, preventing the cylinder from damaging the product due to rapid air intake speed, and ensuring the sealing, thereby ultimately realizing the sealing detection of the product by the airtightness testing equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the buffer mechanism and the cylinder in the preferred embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the main structure of the buffer mechanism and the cylinder in the preferred embodiment of the utility model;

[0020] Among them: fixed plate-1, connecting rod-2, elastic component-3, elastic member-31, fixed sleeve-32, connecting component-4, first connecting plate-41, second connecting plate-42, support rod-43, support block-5, locking member-6, cylinder-7, piston rod-71, cylinder body-72, support plate-8. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solution in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0022] Reference Figure 1 and Figure 2The buffer mechanism used for the air tightness detection device of this embodiment includes a fixing plate 1, a connecting rod 2, an elastic component 3, a connecting component 4 and a support block 5. The elastic component 3 is located between the fixing plate 1 and the connecting component 4. The support block 5 is located below the connecting component 4 to support the connecting component 4. The side of the connecting component 4 close to the cylinder 7 is fixedly connected to the piston rod 71 of the cylinder 7. A support plate 8 is provided on one side of the cylinder body 72 of the cylinder 7. The support plate 8 is fixedly connected to the cylinder body 72 to play a fixed supporting role for the cylinder body 72. One end of the piston rod 71 passes through the thickness direction of the support plate 8 and is fixedly connected to one side of the connecting component 4.

[0023] Furthermore, the connecting assembly 4 includes a first connecting plate 41, a second connecting plate 42, and a plurality of supporting rods 43 for fixedly connecting the first connecting plate 41 and the second connecting plate 42, and the first connecting plate 41 is close to the fixing plate 1. There is a gap between the first connecting plate 41 and the second connecting plate 42, the first connecting plate 41 is parallel to the second connecting plate 42, and the supporting rods 43 are perpendicular to the first connecting plate 41; one end of the piston rod 71 is fixedly connected to the second connecting plate 42.

[0024] Specifically, the connecting rod 2 is parallel to the piston rod 71. In this embodiment, the axis of the connecting rod 2 coincides with the axis of the piston rod 71. One end of the connecting rod 2 is fixedly connected to the fixed plate 1. The end of the connecting rod 2 away from the fixed plate 1 penetrates the thickness direction of the first connecting plate 41 and the connecting rod 2 is slidably connected to the first connecting plate 41, so that the first connecting plate 41 can move back and forth along the length direction of the connecting rod 2. A locking member 6 is provided at the end of the connecting rod 2 away from the fixed plate 1. The locking member 6 is located on the side of the first connecting plate 41 close to the second connecting plate 42 to ensure that the first connecting plate 41 will not fall off the connecting rod 2.

[0025] Furthermore, the elastic component 3 includes an elastic member 31 and a fixing sleeve 32. The elastic member 31 is sleeved on the outside of the end of the connecting rod 2 close to the fixing plate 1. The fixing sleeve 32 has a cavity inside, part of the elastic member 31 is located in the cavity, and the remaining part of the elastic member 31 is located outside the cavity. The end of the fixing sleeve 32 away from the connecting component 4 is fixedly connected to the side of the fixing plate 1 close to the elastic member 31. The elastic member 31 is always between the side of the first connecting plate 41 away from the second connecting plate 42 and the inner wall of the end of the fixing sleeve 32 close to the fixing plate 1, and one end of the elastic member 31 abuts against the inner wall of the end of the fixing sleeve 32 close to the fixing plate 1, and the other end of the elastic member 31 abuts against the side of the first connecting plate 41 away from the second connecting plate 42. The elastic member 31 of this embodiment is preferably a spring.

[0026] In this embodiment, the buffer mechanism has a first state and a second state. When the buffer mechanism is in the first state, the cylinder 7 has not been inflated, and the piston rod 71 has not started to move. At this time, there is a gap between the end of the connecting rod 2 away from the fixed plate 1 and the side of the second connecting plate 42 close to the first connecting plate 41, and there is a gap between the end of the fixing sleeve 32 away from the fixed plate 1 and the first connecting plate 41. When the cylinder 7 is inflated, the piston rod 71 is pushed forward to drive the first connecting plate 41 to continuously approach the fixing sleeve 32 and compress the elastic member 31 until the maximum movement stroke of the elastic member 31 is reached, and the second state of the buffer mechanism is reached. At this time, the end of the connecting rod 2 away from the fixed plate 1 is in contact with the side of the second connecting plate 42 close to the first connecting plate 41. In this state, when the piston rod 71 continues to extend outward, it will only drive the buffer mechanism as a whole to move forward, and the first connecting plate 41 will no longer continue to compress the elastic member 31 until the maximum stroke of the cylinder 7 is reached, and the piston rod 71 will no longer continue to extend.

[0027] Therefore, in order to ensure that the elastic member 31 can exert its maximum buffering effect and absorb the thrust of the cylinder 7 during the extension of the piston rod 71 of the cylinder 7, when the buffer mechanism is in the first state, the gap between the end of the connecting rod 2 away from the fixed plate 1 and the side of the second connecting plate 42 close to the first connecting plate 41 is set to be smaller than the distance between the end of the fixing sleeve 32 away from the fixed plate 1 and the side of the first connecting plate 41 away from the second connecting plate 42.

[0028] The working process of the buffer mechanism in this embodiment is briefly described below:

[0029] The air pump delivers air to drive the cylinder 7 to work, so that the piston rod 71 of the cylinder 7 extends outward to push the entire buffer mechanism forward until the side of the fixed plate 1 away from the fixed sleeve 32 contacts the sealing surface of the product. Then, the first connecting plate 41 begins to compress the elastic part 31 to cause it to begin to deform, absorbing the thrust output by the cylinder 7 until the cylinder 7 reaches the maximum stroke.

[0030] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly. They cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A buffer mechanism for airtightness detection equipment, characterized in that: The buffer mechanism is fixedly connected to one end of the piston rod of the cylinder, and the buffer mechanism includes a fixed plate, a connecting rod, an elastic component and a connecting component. The elastic component is located between the fixed plate and the connecting component. The connecting rod is connected to one end of the connecting component and the connecting component can move back and forth along the length direction of the connecting rod. One end of the connecting rod is fixedly connected to the fixed plate, and the elastic component is sleeved on the outer periphery of the connecting rod.

2. The buffer mechanism according to claim 1, characterized in that: The elastic component comprises an elastic member and a fixing sleeve. The elastic member is sleeved outside the end of the connecting rod close to the fixing plate. One end of the fixing sleeve is fixedly connected to one side of the fixing plate.

3. The buffer mechanism according to claim 2, characterized in that: The fixing sleeve has a cavity inside, part of the elastic member is located in the cavity, and the remaining part of the elastic member is located outside the cavity. One end of the elastic member abuts against the inner wall of one end of the fixing sleeve close to the fixing plate.

4. The buffer mechanism according to claim 2, characterized in that: The connection assembly includes a first connection plate, a second connection plate, and a support rod for fixedly connecting the first connection plate and the second connection plate, the first connection plate is parallel to the second connection plate, and the support rod is perpendicular to the first connection plate.

5. The buffer mechanism according to claim 4, characterized in that: There is a gap between the first connecting plate and the second connecting plate, the first connecting plate is close to the fixing plate, and one end of the connecting rod away from the fixing plate penetrates through the thickness direction of the first connecting plate.

6. The buffer mechanism according to claim 5, characterized in that: A locking piece is disposed at one end of the connecting rod away from the fixing plate, and one end of the elastic piece away from the fixing plate abuts against a side of the first connecting plate away from the second connecting plate.

7. The buffer mechanism according to claim 6, characterized in that: The buffer mechanism has a first state and a second state. When the buffer mechanism is in the first state, there is a gap between one end of the connecting rod away from the fixed plate and one side of the second connecting plate close to the first connecting plate; when the buffer mechanism is in the second state, one end of the connecting rod away from the fixed plate abuts against one side of the second connecting plate close to the first connecting plate.

8. The buffer mechanism according to claim 7, characterized in that: When the buffer mechanism is in the first state, the gap between the end of the connecting rod away from the fixed plate and the side of the second connecting plate close to the first connecting plate is smaller than the distance between the end of the fixing sleeve away from the fixed plate and the side of the first connecting plate away from the second connecting plate.

9. The buffer mechanism according to claim 4, characterized in that: One end of the piston rod is fixedly connected to the second connecting plate, and the connecting rod is parallel to the piston rod.

10. The buffer mechanism according to claim 1, characterized in that: It also includes a support block, which is located below the connecting assembly and is used to support the connecting assembly.

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