Air tightness test tool for pump cover of cooling water pump of commercial vehicle

Abstract

The utility model relates to a commercial vehicle cooling water pump cover air tightness test tool comprising a seat plate, a positioning bottom plate used for installing a water pump cover is fixed on the seat plate, a positioning structure of the water pump cover is arranged on the seat plate, and a water pump cover pressing mechanism is arranged on the positioning bottom plate. The upper surface of the positioning base plate is provided with a lower sealing ring matched with the outline of a bottom face port of a flow channel cavity of the water pump cover, the positioning base plate is provided with an air inlet channel with an air outlet located in the lower sealing ring, and plugging mechanisms used for plugging a top face port and a side face port of the flow channel cavity are further arranged on the upper side and the side portion of the positioning base plate. The tool is helpful for sealing the runner cavity when the water pump cover is subjected to an air tightness test.

Description

Technical Field

[0001] The utility model relates to an airtightness testing tooling for the pump cover of a commercial vehicle cooling water pump. Background Art

[0002] The pump cover of a commercial vehicle cooling water pump is a product of low-pressure die casting of aluminum alloy (hereinafter referred to as: pump cover). Due to the easy entrainment of air during the casting process, there will be porosity, shrinkage and other compactness problems after the product is formed. Therefore, such products need to be subjected to airtightness testing after machining. Since this product has 3 runner cavities, it must pass the airtightness test before it can be delivered to the client for use. For this reason, an airtightness testing tooling for the pump cover of a commercial vehicle cooling water pump is required. Content of the Utility Model

[0003] The purpose of the utility model is to provide an airtightness testing tooling for the pump cover of a commercial vehicle cooling water pump, which helps to seal the runner cavity when the pump cover is subjected to airtightness testing.

[0004] The technical solution of the utility model lies in: an airtightness testing tooling for the pump cover of a commercial vehicle cooling water pump, including a seat plate, a positioning bottom plate for installing the pump cover is fixed on the seat plate, a positioning structure of the pump cover is arranged on the seat plate, a pump cover pressing mechanism is arranged on the positioning bottom plate, a lower sealing ring matching the port contour of the bottom surface of the runner cavity of the pump cover is arranged on the upper surface of the positioning bottom plate, an air inlet channel with an air outlet located in the area within the lower sealing ring is arranged on the positioning bottom plate, and a blocking mechanism for blocking the top port and side port of the runner cavity is also arranged on the upper side and side of the positioning seat plate.

[0005] Further, the positioning structure includes a pair of anti-fooling columns arranged in the diagonal direction of the positioning bottom plate, and a pair of positioning columns passing through the pump cover are arranged on the positioning seat plate.

[0006] Further, the pump cover pressing mechanism includes a pair of rotary clamping cylinders vertically arranged on both sides of the base, and a pressing block for pressing on the upper end surface of the pump cover is fixed on the telescopic rod of the rotary clamping cylinder.

[0007] Further, a thimble driven by a transverse cylinder and used to abut against the side surface of the pump cover is also arranged on one side of the seat plate.

[0008] Further, the air inlet of the air inlet channel is arranged on the side surface of the positioning bottom plate.

[0009] Further, the blocking mechanism includes a gantry installed on the seat plate, a pair of lifting cylinders are installed on the top of the gantry, the lower ends of the telescopic rods of the lifting cylinders are both installed with blocking blocks for covering the top port of the runner cavity, and an upper sealing ring matching the port contour of the top surface of the runner cavity is arranged on the bottom surface of the blocking block.

[0010] Further, a longitudinal cylinder is provided at the rear side of the seat plate, and a rear pressing block for covering the side port of the flow channel cavity of the water pump cover is installed on the telescopic rod of the longitudinal cylinder; an inclined cylinder is obliquely installed at the rear side of the seat plate, and an inclined pressing block for blocking the inclined port of the flow channel cavity is installed on the telescopic rod of the inclined cylinder.

[0011] Compared with the prior art, the utility model has the following advantages: This tooling helps to seal the flow channel cavity during the airtightness test of the water pump cover; at the same time, using a sealing ring matching the shape of the port of the flow channel cavity helps to ensure the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a structural schematic diagram of the water pump cover Figure 1 ;

[0013] Figure 2 is a structural schematic diagram of the water pump cover Figure 2 ;

[0014] Figure 3 is a structural schematic diagram of the present utility model Figure 1 ;

[0015] Figure 4 is a structural schematic diagram of the present utility model Figure 2 ;

[0016] Figure 5 is a structural schematic diagram of the present utility model Figure 3 ;

[0017] Figure 6 is a structural schematic diagram of the water pump cover of the present utility model after being installed on the test tooling;

[0018] In the figure: 1 - water pump cover, 2 - bottom port, 3 - top port, 4 - side port, 5 - inclined port, 10 - seat plate, 20 - positioning bottom plate, 21 - anti-fooling column, 22 - positioning column, 23 - lower sealing ring, 31 - air outlet, 32 - air inlet, 40 - rotary clamping cylinder, 41 - pressing block, 50 - transverse cylinder, 51 - ejector pin, 60 - gantry, 61 - lifting cylinder, 62 - blocking block, 63 - upper sealing ring, 64 - longitudinal cylinder, 65 - rear pressing block, 66 - inclined cylinder, 67 - inclined pressing block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] To make the above features and advantages of the present utility model more understandable, the following specific embodiments are given and described in detail in conjunction with the accompanying drawings, but the present utility model is not limited thereto.

[0020] Refer to Figures 3 to 6

[0021] An airtightness testing tooling for the pump cover of a commercial vehicle cooling water pump, including a base plate 10, on which a positioning base plate 20 for installing the pump cover 1 is fixed. A positioning structure for the pump cover is provided on the base plate for positioning the pump cover; a pump cover pressing mechanism is provided on the positioning base plate, and a lower sealing ring 23 matching the contour of the bottom port 2 of the flow channel cavity of the pump cover is arranged on the upper surface of the positioning base plate, so as to press and fix the pump cover after positioning, ensuring that the contour of the bottom port of the flow channel cavity can be sealed. A plugging mechanism for plugging the top port 3 and the side port 4 of the flow channel cavity is also arranged on the upper side and the side of the positioning base plate, so as to plug the top port and the side ports of the flow channel cavity, forming a sealed chamber in the flow channel cavity. An air inlet channel with an air outlet 31 located in the area within the lower sealing ring is arranged on the positioning base plate, so as to introduce air pressure into the chamber of the flow channel cavity and perform operations such as pressure holding, and judge whether there is an airtightness problem in the flow channel cavity according to whether the air pressure in the chamber changes.

[0022] In this embodiment, in order to better complete the positioning of the pump cover, the positioning structure includes a pair of anti-fooling columns 21 arranged in the diagonal direction of the positioning base plate, and a pair of positioning columns 22 passing through the pump cover are arranged on the positioning base plate.

[0023] In this embodiment, in order to clamp the pump cover, the pump cover pressing mechanism includes a pair of rotary clamping cylinders 40 vertically arranged on both sides of the base, and pressing blocks 41 for pressing on the upper end surface of the side of the pump cover are fixed on the telescopic rods of the rotary clamping cylinders.

[0024] In this embodiment, a thimble 51 driven by a transverse cylinder 50 and used to abut against the side surface of the pump cover is also arranged on one side of the base plate.

[0025] In this embodiment, the air inlet 32 of the air inlet channel is arranged on the side surface of the positioning base plate, so as to be connected with the air supply pipe, and then supply air to each sealed flow channel cavity through the air inlet channel.

[0026] In this embodiment, three independent air inlet channels are arranged on the positioning base plate, so as to supply air to three flow channel cavities independently, and then detect the airtightness.

[0027] In this embodiment, in order to plug the top port and the side port of the flow channel cavity, the plugging mechanism includes a gantry 60 installed on the base plate, a pair of lifting cylinders 61 are installed on the top of the gantry, plugging blocks 62 for plugging the top port of the flow channel cavity are installed at the lower ends of the telescopic rods of the lifting cylinders, and an upper sealing ring 63 matching the contour of the top port of the flow channel cavity is arranged on the bottom surface of the plugging block. A spring abutting against the lifting cylinder is arranged on the plugging block for plugging the circular port of the flow channel cavity.

[0028] In this embodiment, in order to better install the lower sealing ring, a lower groove corresponding to the contour of the bottom port of the flow channel cavity is provided on the positioning bottom plate, and the lower sealing ring is installed in the lower groove. In order to better install the upper sealing ring, an upper groove matching the contour of the top port of the flow channel cavity is provided on the bottom surface of the plugging block, and the upper sealing ring is installed in the upper groove.

[0029] In this embodiment, in order to plug the side port of the flow channel cavity, a longitudinal cylinder 64 is provided at the rear side of the seat plate. A rear pressing block 65 for covering the side port of the flow channel cavity of the water pump cover is installed on the telescopic rod of the longitudinal cylinder. A sealing ring matching the contour of the side port of the flow channel cavity is provided on the rear pressing block. An obliquely installed oblique cylinder 66 is horizontally arranged at the rear side of the seat plate. An oblique pressing block 67 for plugging the oblique port 5 of the flow channel cavity is installed on the telescopic rod of the oblique cylinder. A spring matching the oblique cylinder is provided on the oblique pressing block.

[0030] In this embodiment, each sealing ring adopts a high-quality O-ring. After the O-ring is embedded in the corresponding groove, it will be 1.2 MM higher than the jig plate. When the water pump cover is placed in the tooling, the reverse side will fit with the O-ring, and then when the cylinder presses down, the O-ring will generate a certain amount of deformation to achieve the sealing effect.

[0031] If the present utility model discloses or involves mutually fixedly connected components or structural parts, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connected by bolts or screws), or can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutually fixed connection can also be replaced by an integral structure (for example, manufactured by integral forming using a casting process) (except when it is obviously impossible to adopt the integral forming process).

[0032] In addition, the terms used to represent the positional relationship or shape in any of the technical solutions disclosed in the present utility model, unless otherwise stated, include states or shapes similar, analogous or close to it.

[0033] Any component provided by the present utility model can either be assembled from multiple separate components or be a single component manufactured by an integral forming process.

[0034] The above are only the preferred embodiments of the present utility model, and all equivalent changes and modifications made according to the scope of the patent application of the present utility model shall fall within the scope covered by the present utility model.

Claims

1. A commercial vehicle cooling water pump cover air tightness test tool, including a seat plate, characterized in that: A positioning base plate for installing a water pump cover is fixed on the seat plate, a positioning structure for the water pump cover is arranged on the seat plate, a water pump cover clamping mechanism is arranged on the positioning base plate, a lower sealing ring matching the contour of the bottom port of the flow channel cavity of the water pump cover is arranged on the upper surface of the positioning base plate, an air inlet channel with an air outlet located in the area within the lower sealing ring is arranged on the positioning base plate, and a sealing mechanism for sealing the top port and side port of the flow channel cavity is also arranged on the upper and side parts of the positioning base plate.

2. The commercial vehicle cooling water pump cover air tightness test tool according to claim 1, characterized in that: The positioning structure includes a pair of fool-proofing columns arranged in the diagonal direction of the positioning base plate, and a pair of positioning columns passing through the water pump cover are arranged on the positioning seat plate.

3. The commercial vehicle cooling water pump cover air tightness test tool according to claim 1 or 2, characterized in that: The water pump cover clamping mechanism comprises a pair of rotating clamping cylinders vertically arranged on both sides of the base, and a pressing block for pressing on the upper end surface of the water pump cover is fixed on the telescopic rod of the rotating clamping cylinder.

4. The commercial vehicle cooling water pump cover air tightness test tool according to claim 3, characterized in that: One side of the seat plate is also provided with a ejector pin which is driven by a transverse cylinder and is used for abutting against the side surface of the water pump cover.

5. The commercial vehicle cooling water pump cover air tightness test tool according to claim 1, 2 or 4, characterized in that: The air inlet of the air inlet channel is arranged on the side of the positioning base plate.

6. The commercial vehicle cooling water pump cover air tightness test tool according to claim 1, 2 or 4, characterized in that: The sealing mechanism includes a door frame installed on a seat plate, a pair of lifting cylinders are installed on the top of the door frame, and the lower ends of the telescopic rods of the lifting cylinders are installed with sealing blocks for sealing the top surface ports of the flow channel cavity. The bottom surface of the sealing block is provided with an upper sealing ring that matches the contour of the top surface port of the flow channel cavity.

7. The commercial vehicle cooling water pump cover air tightness test tool according to claim 6, characterized in that: A longitudinal cylinder is arranged on the rear side of the seat plate, and a rear pressure block for sealing the side port of the flow channel cavity of the water pump cover is installed on the telescopic rod of the longitudinal cylinder; an oblique cylinder is obliquely installed on the rear side of the seat plate, and an oblique pressure block for sealing the oblique port of the flow channel cavity is installed on the telescopic rod of the oblique cylinder.

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