Oil pump shell inner cavity detection tool

Abstract

The utility model relates to the field of oil pump production detection equipment, and discloses an oil pump shell inner cavity detection tool which comprises a detection table, the left end of the upper surface of the detection table is fixedly connected with an air source, the center of the upper surface of the detection table is fixedly connected with a rack, and the inner bottom surface of the rack is fixedly connected with a placement table. An annular groove is formed in the upper surface of the containing table, a sealing assembly is arranged in the annular groove and comprises an elastic piece, the elastic piece is fixedly connected to the inner bottom face of the annular groove, a movable annular plate is fixedly connected to the upper end of the elastic piece, and a mounting annular plate is arranged above the movable annular plate. According to the utility model, through the arrangement of the sealing assembly, the bottom of the shell can be completely sealed after the shell is placed on the placing table, and the situation that the weight of the shell completely presses the sealing gasket, so that the wedge-shaped sealing gasket is hardened and cannot rebound, and the sealing effect is influenced is avoided.

Description

Technical Field

[0001] The utility model relates to the field of oil pump production and testing equipment, in particular to an oil pump housing inner cavity testing tool. Background Art

[0002] The oil pump is a lightweight and compact pump that can be used as a hydraulic power source in certain mechanical equipment in conjunction with a cylinder or special equipment. The production quality of the oil pump housing affects the quality and service life of the oil pump. Therefore, after the oil pump housing is produced, it is generally chosen to use an internal cavity detection tool to test the integrity and air tightness of the oil pump housing to avoid cracks on the inner wall of the oil pump housing.

[0003] After searching, Chinese patent announcement number: CN212391184U discloses a device for detecting the sealing performance of an oil pump housing, which includes buckling the oil pump housing onto a sealing gasket. Under the pressure of the sealing block on the cylinder, the upper surface and the step surface of the sealing gasket can be tightly sealed with the end face that cooperates with it. Then, the air source is started to inflate the working chamber of the oil pump housing to a certain pressure through the air channel, and then the pressure is maintained for a certain period of time. If the pressure change during the pressure maintenance process is within the allowable range, it is a qualified product.

[0004] However, during actual use of the above-mentioned inspection tool, when the oil pump housing is placed above the sealing gasket for bottom sealing, the weight of the housing is completely pressed on the top of the sealing gasket, causing severe compression deformation of the sealing gasket. During long-term use, this situation will reduce the rebound efficiency of the sealing gasket, and then cause the sealing gasket to harden and be unable to rebound. When the housing is placed above the sealing gasket, the sealing performance of the housing bottom is greatly reduced, affecting the accuracy of the housing air tightness detection. Therefore, an oil pump housing inner cavity detection tool is proposed to solve the above problem. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides an oil pump housing inner cavity detection tool, which aims to improve the problem in the existing technology that when the detection tool is used, the weight of the housing is completely pressed on the sealing gasket, resulting in the sealing gasket hardening and being unable to rebound after long-term use, affecting the detection accuracy.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: an oil pump housing inner cavity detection tool, comprising a detection table, the left end of the upper surface of the detection table is fixedly connected to an air source, the center of the upper surface of the detection table is fixedly connected to a frame, the inner bottom surface of the frame is fixedly connected to a placement table, the upper surface of the placement table is provided with an annular groove, and a sealing assembly is arranged inside the annular groove, and the sealing assembly comprises: an elastic member, the elastic member is fixedly connected to the inner bottom surface of the annular groove, the upper end of the elastic member is fixedly connected to a movable ring plate, a mounting ring plate is arranged above the movable ring plate, a mounting unit is arranged at the bottom of the mounting ring plate, the upper surface of the mounting ring plate is fixedly connected to a wedge-shaped sealing gasket, the inner ring wall surface of the annular groove is fixedly connected to a fixed ring plate, the upper end of the fixed ring plate is fixedly connected to a sealing ring, and a limiting unit is arranged inside the annular groove.

[0007] As a further description of the above technical solution:

[0008] Grooves are provided on both left and right ends of the upper surface of the placing table, and a screw is rotatably connected to the surface of one side of the groove near the center of the placing table. The end of the screw away from the center of the placing table passes through the placing table, and the end of the screw away from the center of the placing table is fixedly connected to a handle, and the outer side of the screw is threadedly connected to a clamping plate, and a rubber pad is fixedly connected to one side of the clamping plate near the center of the placing table.

[0009] As a further description of the above technical solution:

[0010] The mounting unit includes an annular slot, which is opened on the upper surface of the movable ring plate. A connecting ring plate is inserted into the annular slot, and the upper surface of the connecting ring plate is fixedly connected to the bottom surface of the mounting ring plate.

[0011] As a further description of the above technical solution:

[0012] The limiting unit includes a support rod, the support rod is fixedly connected to the inner bottom surface of the annular groove, and the top end of the support rod is fixedly connected to the limiting ring plate.

[0013] As a further description of the above technical solution:

[0014] The cross section of the sealing ring is arranged in a trapezoidal structure, and the sealing ring is located directly below the inner ring end of the wedge-shaped sealing gasket.

[0015] As a further description of the above technical solution:

[0016] The elastic member is composed of a telescopic rod and a spring. The bottom end of the telescopic rod is fixedly connected to the inner bottom surface of the annular groove. The upper end of the telescopic rod is fixedly connected to the bottom surface of the movable ring plate. The spring is sleeved on the outside of the spring.

[0017] As a further description of the above technical solution:

[0018] The outer wall of the clamping plate and the inner wall of the groove are in contact with each other.

[0019] As a further description of the above technical solution:

[0020] The screw rod is threadedly connected to the placement platform.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the present invention, the sealing assembly is provided, and the bottom of the shell can be completely sealed after the shell is placed on the placement table, and the weight of the shell is prevented from being completely pressed on the sealing gasket, causing the wedge-shaped sealing gasket to harden and be unable to rebound, affecting the sealing effect. Through the cooperation of the provided annular slot and the connecting ring plate, the wedge-shaped sealing gasket can be quickly plugged in, installed and disassembled, and the operation is simple.

[0023] 2. In the present invention, the cooperation of the grooves, screws, handles, clamping plates and rubber pads can quickly clamp and fix the shell after it is placed, thereby preventing the shell from being shaken by impact during the detection process, which may affect the accuracy of the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of an oil pump housing inner cavity detection tool proposed by the present invention;

[0025] Figure 2 This is a schematic diagram of a frontal cross-section of the interior of a placement platform for a tool for inspecting the inner cavity of an oil pump housing proposed in the present invention;

[0026] Figure 3 This utility model proposes a tool for detecting the inner cavity of the oil pump housing. Figure 2 Schematic diagram at part A;

[0027] Figure 4 This is a schematic diagram of a partial cross-section of a sealing assembly of an oil pump housing inner cavity detection tool proposed in the present invention after explosion;

[0028] Figure 5 This utility model proposes a tool for detecting the inner cavity of the oil pump housing. Figure 4 Schematic diagram of part B.

[0029] Legend:

[0030] 1. Testing table; 2. Air source; 3. Rack; 4. Placement table; 5. Annular groove; 601. Elastic part; 602. Movable ring plate; 603. Annular slot; 604. Connecting ring plate; 605. Mounting ring plate; 606. Wedge-shaped sealing gasket; 607. Fixed ring plate; 608. Sealing ring; 609. Support rod; 610. Limiting ring plate; 701. Groove; 702. Screw; 703. Handle; 704. Clamping plate; 705. Rubber pad. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0032] Reference Figure 1 , the utility model provides an embodiment: an oil pump housing inner cavity detection tool, including a detection platform 1, the left end of the upper surface of the detection platform 1 is fixedly connected to the air source 2, the center of the upper surface of the detection platform 1 is fixedly connected to the frame 3, the top of the frame 3 is fixedly connected to the cylinder, the bottom end of the cylinder is fixedly connected to the sealing block, the inner bottom surface of the frame 3 is fixedly connected to the placement platform 4, the right side of the air source 2 is fixedly connected to the connecting pipe, the bottom end of the placement platform 4 is fixedly connected to the base plate, the right end of the connecting pipe passes through the base plate and is vertically upward through the center of the placement platform 4, and the outer side of the connecting pipe is fixed A pressure gauge is fixedly connected. After the shell is placed on the placement table 4, the cylinder can be started to drive the sealing block to move downward to seal the top of the shell and squeeze and fix the shell. The number and installation position of the cylinder and the sealing block can be set according to the number of air outlets of the shell. Then the gas source 2 can be started to pass the gas into the shell, and the sealing of the shell can be judged according to the value displayed on the pressure gauge. This is a simple existing technical means in this field and will not be elaborated here. An annular groove 5 is provided on the upper surface of the placement table 4, and a sealing component is provided inside the annular groove 5.

[0033] Reference Figure 3-Figure 5The sealing assembly includes: an elastic member 601, which is fixedly connected to the inner bottom surface of the annular groove 5. The elastic member 601 is composed of a telescopic rod and a spring. The bottom end of the telescopic rod is fixedly connected to the inner bottom surface of the annular groove 5, and the telescopic rod and the upper end are fixedly connected to the bottom surface of the movable ring plate 602. The spring is sleeved on the outside of the spring. The upper end of the elastic member 601 is fixedly connected to the movable ring plate 602. When the movable ring plate 602 moves downward, it can squeeze the elastic member 601 so that the elastic member 601 is compressed to generate elastic potential energy. A mounting ring plate 605 is provided above the movable ring plate 602, and a mounting unit is provided at the bottom of the mounting ring plate 605. The mounting unit includes an annular slot 603, which is opened on the upper surface of the movable ring plate 602. A connecting ring plate 604 is inserted into the annular slot 603. The upper surface of the connecting ring plate 604 is fixedly connected to the bottom surface of the mounting ring plate 605. Then, when the mounting ring plate 605 needs to be disassembled and replaced, it can be directly lifted up. The upper surface of the mounting ring plate 605 is fixedly connected to a wedge-shaped sealing gasket 606. When the wedge-shaped sealing gasket 606 moves, it can drive the mounting ring plate 605 to move synchronously. When the wedge-shaped sealing gasket 606 needs to be replaced after long-term use, it can be directly lifted up. When the shell is placed on the placement table 4 for inspection, the wedge-shaped sealing gasket 606 will be squeezed downward, so that the wedge-shaped sealing gasket 606 enters the inside of the annular groove 5. At the same time, the wedge-shaped sealing gasket 606 will fit tightly with the bottom surface of the shell under the action of the elastic potential energy of the elastic member 601, thereby achieving sealing of the bottom of the shell, avoiding the weight of the shell being completely applied to the sealing gasket, resulting in the sealing gasket hardening and being unable to rebound after long-term use, and then the bottom of the shell cannot be completely sealed.

[0034] The inner ring wall surface of the annular groove 5 is fixedly connected with a fixed ring plate 607, and the upper end of the fixed ring plate 607 is fixedly connected with a sealing ring 608. The cross-section of the sealing ring 608 is arranged in a trapezoidal structure. The sealing ring 608 is located directly below the inner ring end of the wedge-shaped sealing gasket 606. When the wedge-shaped sealing gasket 606 is squeezed and moves downward, the inclined surface of its inner wall will fit together with the outer inclined surface of the sealing ring 608 and squeeze each other. At this time, the sealing ring 608 will seal the gap between the wedge-shaped sealing gasket 606 and the inner wall of the annular groove 5 to prevent the wedge-shaped sealing gasket 606 from hardening after long-term use, resulting in a gap between the inner wall of the annular groove 5, and further affecting the air tightness detection of the shell.

[0035] A limiting unit is set inside the annular groove 5, and the limiting unit includes a support rod 609. The support rod 609 is fixedly connected to the inner bottom surface of the annular groove 5, and the top of the support rod 609 is fixedly connected to the limiting ring plate 610. Through the cooperation of the set support rod 609 and the limiting ring plate 610, the moving distance of the mounting ring plate 605 can be limited, which can prevent the mounting ring plate 605 from moving downward too much, resulting in exceeding the compression limit of the elastic part 601 and affecting the service life of the elastic part 601.

[0036] Reference Figure 2 , grooves 701 are provided on both ends of the upper surface of the placing table 4, and a screw 702 is rotatably connected to the surface of one side of the groove 701 near the center of the placing table 4. The screw 702 is threadedly connected to the placing table 4, and the end of the screw 702 away from the center of the placing table 4 passes through the placing table 4. The end of the screw 702 away from the center of the placing table 4 is fixedly connected to a handle 703. The staff can drive the screw 702 to rotate by rotating the handle 703. The outer side of the screw 702 is threadedly connected to a clamping plate 704. The outer wall of the clamping plate 704 fits with the inner wall of the groove 701. 1 can guide and limit the movement of the clamping plate 704, so that the clamping plate 704 can only move linearly in the left and right directions. When the shell is placed on the placement table 4, the handle 703 can be rotated to drive the clamping plate 704 to move toward the outer wall of the shell within the limit of the groove 701. At this time, the clamping plate 704 can clamp and fix the shell, so that the shell can remain stably placed during the air tightness test. A rubber pad 705 is fixedly connected to one side of the clamping plate 704 near the center of the placement table 4. The rubber pad 705 can prevent the clamping plate 704 from making hard contact with the outer wall of the shell, which may cause damage to the outer wall of the shell.

[0037] Working principle: Place the shell on the placement table 4, and make the opening below the shell be located at the center of the placement table 4. At this time, the shell will squeeze the wedge-shaped sealing gasket 606 to make it enter the inside of the annular groove 5. The wedge-shaped sealing gasket 606 will fit tightly with the bottom surface of the shell under the elastic potential energy of the elastic part 601. At the same time, the sealing ring 608 can seal and fill the gap between the wedge-shaped sealing gasket 606 and the inner wall of the annular groove 5 to avoid the gap after long-term use affecting the sealing effect on the bottom of the shell, and at the same time avoid the weight of the shell from being completely pressed on the wedge-shaped sealing gasket 606, causing it to harden and be unable to rebound. The handle 703 can then be rotated to drive the clamping plate 704 to move toward the shell to clamp and fix the shell to ensure the stability of the shell during the inspection process. When the wedge-shaped sealing gasket 606 needs to be replaced, it can be disassembled by simply lifting it up, which is easy to do.

[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A tool for inspecting the inner cavity of an oil pump housing, comprising a test bench (1), wherein the left end of the upper surface of the test bench (1) is fixedly connected to an air source (2), the center of the upper surface of the test bench (1) is fixedly connected to a frame (3), and the inner bottom surface of the frame (3) is fixedly connected to a placement table (4), characterized in that: An annular groove (5) is provided on the upper surface of the placing table (4), and a sealing assembly is provided inside the annular groove (5). The sealing assembly includes an elastic member (601), and the elastic member (601) is fixedly connected to the inner bottom surface of the annular groove (5). The upper end of the elastic member (601) is fixedly connected to a movable ring plate (602), and a mounting ring plate (605) is provided above the movable ring plate (602). The bottom of the mounting ring plate (605) is provided with a mounting unit, and the upper surface of the mounting ring plate (605) is fixedly connected to a wedge-shaped sealing gasket (606). The inner ring wall surface of the annular groove (5) is fixedly connected to a fixed ring plate (607), and the upper end of the fixed ring plate (607) is fixedly connected to a sealing ring (608). A limiting unit is provided inside the annular groove (5).

2. The oil pump housing inner cavity detection tool according to claim 1, characterized in that: The left and right ends of the upper surface of the placing platform (4) are provided with grooves (701), and a screw rod (702) is rotatably connected to the surface of one side of the groove (701) near the center of the placing platform (4). The end of the screw rod (702) away from the center of the placing platform (4) passes through the placing platform (4), and the end of the screw rod (702) away from the center of the placing platform (4) is fixedly connected to a handle (703). The outer side of the screw rod (702) is threadedly connected to a clamping plate (704), and the side of the clamping plate (704) near the center of the placing platform (4) is fixedly connected to a rubber pad (705).

3. The oil pump housing inner cavity detection tool according to claim 1, characterized in that: The mounting unit comprises an annular slot (603), the annular slot (603) being provided on the upper surface of the movable ring plate (602), a connecting ring plate (604) being inserted into the annular slot (603), and the upper surface of the connecting ring plate (604) being fixedly connected to the bottom surface of the mounting ring plate (605).

4. The oil pump housing inner cavity detection tool according to claim 1, characterized in that: The limiting unit comprises a support rod (609), the support rod (609) is fixedly connected to the inner bottom surface of the annular groove (5), and the top end of the support rod (609) is fixedly connected to a limiting ring plate (610).

5. The oil pump housing inner cavity detection tool according to claim 1, characterized in that: The cross section of the sealing ring (608) is arranged in a trapezoidal structure, and the sealing ring (608) is located directly below the inner ring end of the wedge-shaped sealing gasket (606).

6. The oil pump housing inner cavity detection tool according to claim 1, characterized in that: The elastic member (601) is composed of a telescopic rod and a spring. The bottom end of the telescopic rod is fixedly connected to the inner bottom surface of the annular groove (5). The upper end of the telescopic rod is fixedly connected to the bottom surface of the movable ring plate (602). The spring is sleeved on the outside of the spring.

7. The oil pump housing inner cavity detection tool according to claim 2, characterized in that: The outer wall of the clamping plate (704) and the inner wall of the groove (701) are in contact with each other.

8. The oil pump housing inner cavity detection tool according to claim 2, characterized in that: The screw rod (702) is threadedly connected to the placement platform (4).

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