CN111795780A - Fuel pump bracket air tightness test device - Google Patents

Abstract

An air tightness test device for a fuel pump support relates to the technical field of testing and testing equipment, and includes a water tank and an airtight table that can move up and down. The block of the hole; the main fixture includes a main base for placing the workpiece, a plurality of ejector rods for pressing the bottom surface of the right part of the workpiece against the main base, a receiving plate connected to the top of each ejector rod, and a connecting and receiving plate used together to drive the bearing plate to move the top cylinder up and down; the auxiliary fixture includes the auxiliary base set on the left side of the main base, the main side push cylinder set on the auxiliary base, and the side pressure block connected to the right end of the piston rod of the main side push cylinder. The right end face is provided with a special-shaped groove for matching the left side of the workpiece and the bottom surface of the left; a lifting cylinder is arranged in the water tank, and the top of the piston rod of the lifting cylinder is fixedly connected with the airtight table. The invention can improve work efficiency, reduce labor force, and improve the accuracy of air tightness test.

Description

Fuel pump bracket air tightness test device

technical field

The invention relates to the technical field of testing equipment, in particular to a device for testing the air tightness of a fuel pump bracket.

Background technique

The fuel pump bracket is an important part of the fuel pump structure. Its structure is shown in Figure 1. In order to ensure the sealing effect of the fuel pump, the fuel pump bracket needs to have strict sealing performance, so it is usually air-conditioned before leaving the factory. Confidentiality test. The traditional air tightness test of the fuel pump bracket is to hold the workpiece through a set of simple fixtures and connect the gas pipe, and then use lifting equipment such as electric hoist to hoist it into the water tank. This operation process is labor-intensive, low-efficiency, and the operation process. It may also cause loosening of the clamps, etc., which will affect the accuracy of the air tightness test.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a fuel pump support air tightness test device, which can use the cylinder to drive the air tight table to move directly into the water tank, so as to improve work efficiency, reduce labor, and improve the accuracy of air tightness test.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions: a fuel pump support air tightness test device, including a water tank and an air tight table that can move up and down, on which a main fixture, a secondary fixture and a a blocking block for blocking the corresponding holes on the workpiece; the main fixture includes a main base for placing the workpiece, a plurality of positioning pins arranged on the main base, a plurality of pins for pressing the right bottom surface of the workpiece against The ejector rod on the main base, the receiving plate connected to the top of each ejector rod, and the connecting bearing plate are used to drive the bearing plate to move the top cylinder up and down, and the bottom end of the ejector rod can block the hole at the corresponding position on the workpiece; the The auxiliary fixture includes an auxiliary base set on the left side of the main base, a main side push cylinder set on the auxiliary base, and a side pressure block connected to the right end of the piston rod of the main side push cylinder. The special-shaped grooves on the left side and the bottom surface of the left part, the side pressure block is provided with a top pin along its moving direction, the left end of the top pin is provided with a limit block, and the top pin is sleeved with a tension spring and The two ends of the tension spring abut against the right end of the limit block and the left end of the side pressure block respectively, the right end of the ejector pin is provided with a first plug that can block the hole at the corresponding position on the workpiece, and the auxiliary base is also provided with a first plug. A secondary side thrust cylinder is provided, and the right end of the piston rod of the secondary side thrust cylinder is connected with a second plug for blocking the hole corresponding to the left end of the workpiece; any one of the blocking blocks is connected with an air intake pipe, and the One end extends into one end of the blocking block and can communicate with the inside of the workpiece; a lifting cylinder is arranged below the water tank, and the top end of the piston rod of the lifting cylinder extends into the water tank and extends upward to be fixedly connected with the airtight table. The air cylinder can drive the airtight table to move up and down, so that the workpiece can be immersed in the water tank.

Further, the right end of the side pressure block is fixedly connected with a plurality of guide rods along its moving direction, the left end of the main base is correspondingly provided with a plurality of guide holes, and the right end of the guide rod is inserted into the corresponding guide holes and can be inserted into the corresponding guide holes. Move along the guide hole.

Preferably, four support rods are fixedly installed on the airtight table, a mounting plate is connected to the top of each support rod, and the top air cylinder is fixed on the mounting plate.

More preferably, each blocking block is correspondingly arranged on a separate blocking block cylinder.

More preferably, it also includes a cabinet, the water tank is arranged at the lower part of the cabinet, the airtight platform is located in the cabinet above the water tank, and the cabinet is provided with a cabinet door.

The beneficial effect of the invention is that: the fuel pump support workpiece is placed on the airtight table, and after the workpiece is positioned and clamped by the main clamp, the auxiliary clamp and each blocking block, the lifting cylinder can be used to drive the entire airtight table and the workpiece to quickly Descend into the water in the tank and the air intake pipe can then be vented for air tightness testing. This process can effectively improve work efficiency and reduce labor, and because the lift cylinder drives the airtight table and the workpiece to move more stably than traditional manual electric hoists, it can largely avoid the loosening of fixtures. , thereby improving the accuracy of the air tightness test.

Description of drawings

Fig. 1 is the structural representation of fuel pump bracket;

FIG. 2 is a schematic diagram of the overall structure when the lower part of the cabinet is seen through in an embodiment of the present invention;

3 is a schematic diagram of the overall structure of the cabinet when the cabinet door is closed in an embodiment of the present invention;

Fig. 4 is the partial structure schematic diagram of the main clamp and the auxiliary clamp in the embodiment;

FIG. 5 is a schematic structural diagram of the auxiliary fixture in the embodiment.

The reference numbers are:

1——Water tank 2——Airtight table 3——Workpiece

4——Blocking block 5a——Main base 5b——Ejector rod

5c - receiving plate 5d - top cylinder 6a - sub-base

6b——Main side push cylinder 6c——Side pressure block 6d——Special-shaped groove

6e——Guide rod 7——Ejector pin 7a——Limiting block

7b——The first plug 8——The secondary side thrust cylinder 8a——The second plug

9——Intake pipe 10——Lifting cylinder 11——Support rod

12 - mounting plate 13 - cabinet.

Detailed ways

In order to facilitate the understanding of those skilled in the art, the present invention will be further described below with reference to the embodiments and the accompanying drawings, and the contents mentioned in the embodiments are not intended to limit the present invention.

It should be noted in advance that, in the present invention, unless otherwise expressly specified and limited, terms such as "installation", "connection", "connection", "fixation" should be interpreted in a broad sense, for example, it may be a fixed connection, It can also be a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In addition, in the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may include direct contact between the first and second features, or may include the first and second features Not directly but through additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature. Terms "top", "bottom", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention.

As shown in Figure 1-5, the fuel pump bracket air tightness test device includes a water tank 1 and a gas tight table 2 that can move up and down. The gas tight table 2 is equipped with a main fixture, a secondary fixture, and a plurality of pieces for sealing the workpiece. The block 4 of the corresponding hole on the The bottom surface of the right part of the upper right part is pressed against the ejector rod 5b on the main base 5a, the bearing plate 5c connected to the top of each ejector rod 5b, and the connecting bearing plate 5c and used to drive the bearing plate 5c to move the top cylinder 5d up and down, and the bottom end of the ejector rod 5b The hole at the corresponding position on the workpiece 3 can be blocked; the auxiliary fixture includes the auxiliary base 6a arranged on the left side of the main base 5a, the main side pushing cylinder 6b arranged on the auxiliary base 6a, and the side connecting the right end of the piston rod of the main side pushing cylinder 6b The pressing block 6c, the right end face of the side pressing block 6c is provided with a special-shaped groove 6d for matching the left side and the bottom surface of the left part of the workpiece 3, and the side pressing block 6c is provided with a top pin 7 along its movement direction, and the left end of the top pin 7 There is a limit block 7a, a tension spring is sleeved on the ejector pin 7, and the two ends of the tension spring abut against the right end of the limit block 7a and the left end of the side pressure block 6c respectively, and the right end of the ejector pin 7 is provided with a blockable block. The first plug 7b of the hole at the corresponding position on the workpiece 3, the auxiliary base 6a is also provided with a secondary side thrust cylinder 8, and the right end of the piston rod of the secondary side thrust cylinder 8 is connected with a second plug for blocking the corresponding hole at the left end of the workpiece 3. Two plugs 8a; any one of the blocking blocks 4 is connected with an air intake pipe 9, and one end of the air intake pipe 9 extends into one end of the blocking block 4 and can be connected to the interior of the workpiece 3; the lower part of the water tank 1 is provided with a lifting cylinder 10, and the lifting cylinder 10. The top of the piston rod extends into the water tank 1 and extends upward to be fixedly connected with the airtight table 2. The lift cylinder 10 can drive the airtight table 2 to move up and down, so that the workpiece 3 can be immersed in the water tank 1.

When the air-tightness test device for the fuel pump support provided by the above embodiment is in operation, firstly, the position of the air-tight table 2 is above the water tank 1, and the workpiece of the fuel pump bracket is placed on the air-tight table 2, and passes through the main fixture and the auxiliary fixture successively. , After the workpiece 3 is positioned and clamped by each block 4, the lifting cylinder 10 can be used to drive the entire airtight table 2 and the workpiece 3 to quickly drop into the water in the water tank 1, and then the air intake pipe 9 can be ventilated to ensure air tightness. After the test, observe whether there are air bubbles in the water tank 1 to evaluate the airtightness. After the test is completed, push the airtight table 2 upward through the lifting cylinder 10, and then the workpiece 3 can be pushed up from the water tank 1, and then in turn The workpiece 3 can be removed by loosening each blocking block 4, the auxiliary fixture and the main fixture. This process can effectively improve work efficiency and reduce labor, and because the lift cylinder 10 drives the airtight table 2 and the workpiece 3 to move with better stability than the traditional manual electric hoist, it can largely avoid fixtures loose, thereby improving the accuracy of the air tightness test.

It should be noted that those skilled in the art should know that each cylinder structural component in the device has a normal waterproof effect. Sealing is performed, and the structures such as the shaft hole on the workpiece 3 can be sealed by setting a stopper at the bottom end of the ejector rod 5b. Those skilled in the art do not have any technical obstacles for setting the position and quantity of the ejector rod 5b. The corresponding design can be carried out according to the actual structure of the workpiece 3 .

In the above embodiment, by providing the ejector pin 7 and enabling the ejector pin 7 to move synchronously with the side pressing block 6c, the ejector pin 7 does not need to be equipped with an additional air cylinder, which saves the cost and makes the structure of the auxiliary clamp more compact, and The tension spring (not shown in the drawings) set on the ejector pin 7 enables the ejector pin 7 to generate a certain thrust to the right end, and at the same time, a sufficient assembly distance can be reserved, for example, when the first plug on the right end of the ejector pin 7 When the 7b is in contact with the left end of the workpiece 3, it can be moved to the left properly and the tension spring can be further tensioned to ensure that the first plug 7b can be firmly attached to the workpiece 3. Of course, in the normal assembly state, the ejector pin 7 is pulled. The left end face of the workpiece 3 can also be pressed against under the force of the spring.

Further, on the above basis, the right end of the side pressing block 6c is fixedly connected with a plurality of guide rods 6e along its moving direction, the left end of the main base 5a is correspondingly provided with a plurality of guide holes, and the right end of the guide rod 6e is inserted into the corresponding guide hole. It can move along the guide hole, which can effectively improve the stability of the side pressing block 6c during the moving process.

Preferably, four support rods 11 are fixedly installed on the airtight table 2, a mounting plate 12 is connected to the top of each support rod 11, and the top cylinder 5d is fixed on the mounting plate 12. When the lift cylinder 10 drives the airtight table 2 When moving up and down, the support rod 11 , the mounting plate 12 and the top air cylinder 5d also move synchronously with the airtight table 2 .

More preferably, each blocking block 4 is correspondingly arranged on a separate blocking block cylinder, and the orientation direction of the blocking block 4 is not specifically limited, because the structural positions of some holes are different for different fuel pump brackets , so the specific orientation of the blocking block 4 can be set according to the actual structure of the workpiece 3 , and there is no obstacle for those skilled in the art.

In addition, in this embodiment, the test device further includes a cabinet 13, the water tank 1 is arranged at the lower part of the cabinet 13, the airtight table 2 is located in the cabinet 13 above the water tank 1, the cabinet 13 is provided with a cabinet door, and the cabinet 12 is divided into The upper cabinet and the lower cabinet, the left part of the lower cabinet can place electrical equipment, the right part can place the water tank 1, the left part of the upper cabinet can be set with a control center and a control panel, and the right part can accommodate an airtight table 2. For the main fixture, auxiliary fixture and blocking block 4, etc., each section of the upper cabinet and the lower cabinet can be provided with cabinet doors separately, which is convenient for related operations or maintenance.

The above-mentioned embodiment is a preferred implementation scheme of the present invention. In addition, the present invention can also be implemented in other ways, and any obvious replacements are within the protection scope of the present invention without departing from the concept of the technical solution.

In order to make it easier for those skilled in the art to understand the improvements of the present invention relative to the prior art, some drawings and descriptions of the present invention have been simplified, and for the sake of clarity, some other elements are also omitted in this application document, One of ordinary skill in the art would realize that these omitted elements may also constitute the subject matter of the present invention.

Claims (5)

1. A fuel pump support air tightness test device, characterized in that it includes a water tank (1) and an airtight table (2) that can move up and down, and the airtight table (2) is provided with a main fixture, an auxiliary fixture and a a block (4) for blocking the corresponding hole on the workpiece (3); The main fixture includes a main base (5a) for placing the workpiece (3), a plurality of positioning pins arranged on the main base (5a), and a plurality of positioning pins for pressing the right bottom surface of the workpiece (3) against the main base (5a). The ejector rod (5b) on the base (5a), the receiving plate (5c) connected to the top of each ejector rod (5b), and the connecting bearing plate (5c) are used to drive the bearing plate (5c) to move the top cylinder (5d) up and down, The bottom end of the top rod (5b) can block the hole at the corresponding position on the workpiece (3); The auxiliary fixture comprises an auxiliary base (6a) arranged on the left side of the main base (5a), a main side thrust cylinder (6b) arranged on the auxiliary base (6a), and a main side thrust cylinder (6b) connected to the right end of the piston rod. A side pressure block (6c), the right end surface of the side pressure block (6c) is provided with a special-shaped groove (6d) for matching the left side surface and the left bottom surface of the workpiece (3). The upper edge of the side pressure block (6c) is A top pin (7) is provided in the direction of movement of the top pin, a limit block (7a) is provided at the left end of the top pin (7), a tension spring is sleeved on the top pin (7), and two ends of the tension spring are provided. Abut against the right end of the limiting block (7a) and the left end of the side pressure block (6c) respectively, and the right end of the ejector pin (7) is provided with a first plug ( 7b), a secondary side thrust cylinder (8) is also provided on the secondary base (6a), and the right end of the piston rod of the secondary side thrust cylinder (8) is connected with a hole for blocking the corresponding hole at the left end of the workpiece (3). second plug (8a); Any one of the blocking blocks (4) is connected with an air inlet pipe (9), and one end of the air inlet pipe (9) extends into one end of the blocking block (4) and can communicate with the inside of the workpiece (3); A lifting cylinder (10) is arranged below the water tank (1), and the top end of the piston rod of the lifting cylinder (10) extends into the water tank (1) and extends upward to be fixedly connected with the airtight platform (2). The lift cylinder (10) can drive the airtight table (2) to move up and down, so that the workpiece (3) can be immersed in the water tank (1). 2. The device for testing the air tightness of a fuel pump support according to claim 1, characterized in that: the right end of the side pressure block (6c) is fixedly connected with a plurality of guide rods (6e) along its moving direction, and the main The left end of the base (5a) is correspondingly provided with a plurality of guide holes, and the right end of the guide rod (6e) is inserted into the corresponding guide holes and can move along the guide holes. 3 . The air tightness test device for a fuel pump support according to claim 2 , wherein four support rods ( 11 ) are fixedly installed on the air tight table ( 2 ), and the top of each support rod ( 11 ) is fixed at the top of each support rod ( 11 ). A mounting plate (12) is connected, and the top cylinder (5d) is fixed on the mounting plate (12). 4 . The air tightness test device for a fuel pump support according to claim 3 , wherein each blocking block ( 4 ) is correspondingly arranged on a separate blocking block cylinder. 5 . 5. The device for testing the air tightness of a fuel pump support according to claim 4, characterized in that it further comprises a cabinet (13), the water tank (1) is arranged at the lower part of the cabinet (13), and the air tightness table (2) In a cabinet (13) located above the water tank (1), the cabinet (13) is provided with a cabinet door.

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