Clamping device for engine valve detection

Abstract

The utility model discloses an engine valve detection clamping device, which belongs to the technical field of valve detection, and comprises a three-jaw chuck which is arranged on a roundness measuring instrument workbench and can rotate, and the three-jaw chuck detachably clamps a vertical connecting rod. The top end of the connecting rod is detachably connected with a suction cup coaxial with the connecting rod, and the diameter of the opening end of the suction cup is smaller than that of the bottom end of the valve head. As the diameter of the opening end of the sucker is smaller than that of the bottom end of the valve head, when the valve is adsorbed on the sucker, part of the bottom end of the valve head is still exposed out of the sucker, and jumping detection can be conveniently carried out on the bottom surface of the valve; and meanwhile, the air valve is adsorbed on the suction cup, so that the air valve is clamped on the roundness measuring instrument, the top perpendicularity and the rod cylindricity of the air valve can be conveniently detected, the purpose of detecting the top perpendicularity, the rod cylindricity and the bottom surface run-out of the air valve through one-time clamping is achieved, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of valve detection technology, specifically relating to an engine valve detection clamping device. Background Technology

[0002] As a crucial component of an engine, the valve is specifically responsible for introducing air into the engine and expelling combustion gases. Structurally, it is divided into intake valves and exhaust valves. A valve consists of a valve head and a stem. The valve head is generally flat-topped, and the stem is cylindrical. Flat-topped valve heads are simple in structure, easy to manufacture, and can be used for both intake and exhaust valves. To ensure proper valve operation, the valve head's flat-top perpendicularity, stem's cylindricity, and bottom surface runout need to be checked. Currently, most valves use roundness testers to inspect the form and position tolerances above the valve. Roundness testers are divided into sensor rotary type and table rotary type. When using a table rotary roundness tester, the valve top or bottom must be selected to engage with the table. Therefore, it is impossible to complete the measurement of top perpendicularity and bottom surface runout in a single clamping, requiring the valve to be clamped at least twice on the roundness tester, resulting in wasted time and reduced work efficiency. Utility Model Content

[0003] To address the problem that existing technologies require valves to be clamped at least twice on a roundness tester during valve inspection, resulting in wasted time and reduced work efficiency, this invention provides an engine valve inspection clamping device that can inspect the valve's top verticality, stem cylindricity, and bottom runout in a single operation after valve clamping, eliminating the need for multiple valve clamping operations and improving work efficiency.

[0004] The technical solution adopted by this utility model for an engine valve detection clamping device is as follows:

[0005] An engine valve testing clamping device includes a three-jaw chuck that can rotate on the roundness tester's worktable. The three-jaw chuck has a detachable clamping gripper for a vertical connecting rod. A suction cup arranged coaxially with the connecting rod is detachably connected to the top of the connecting rod, and the diameter of the opening end of the suction cup is smaller than the diameter of the bottom end of the valve head.

[0006] A further improvement of this utility model is that each jaw of the three-jaw chuck can be detachably connected to an arc-shaped plate that cooperates with the connecting rod at the end away from the three-jaw chuck.

[0007] A further improvement of the above-mentioned technical solution of this utility model is that: the side wall of the connecting rod is coaxially fixedly sleeved with a clamping block that cooperates with the arc-shaped plate.

[0008] A further improvement of the above-mentioned technical solution of this utility model is that: the diameter of the clamping block is smaller than the diameter of the circle formed by the arc plates when the three-jaw chuck is in the released state, and at the same time, the diameter of the clamping block is larger than the diameter of the circle formed by the arc plates when the three-jaw chuck is in the clamping state.

[0009] A further improvement of this utility model is that: the top end of the connecting rod is provided with an internal threaded hole, and the bottom of the suction cup is provided with a screw that mates with the internal threaded hole.

[0010] A further improvement of the present invention is that: a drive motor for driving the three-jaw chuck to rotate is provided on the roundness tester worktable, and the three-jaw chuck is located above the drive motor and fixedly connected to the output shaft of the drive motor.

[0011] A further improvement of the above-mentioned technical solution of this utility model is that: a protective cover for protecting the drive motor is provided on the roundness tester worktable, and the output shaft of the drive motor passes through the top of the protective cover and is connected to the three-jaw chuck.

[0012] A further improvement of the above-mentioned technical solution of this utility model is that: the top of the protective cover is provided with a through hole for the output shaft of the drive motor to pass through.

[0013] Due to the adoption of the above technical solution, the technical progress achieved by this utility model includes:

[0014] In this invention, since the diameter of the suction cup opening is smaller than the diameter of the valve head bottom, the bottom of the valve head is adsorbed onto the suction cup, with a portion still protruding from the suction cup. This facilitates the detection of valve runout on the bottom surface. Simultaneously, adsorbing the valve onto the suction cup allows it to be clamped onto a roundness tester, facilitating the detection of valve top verticality and stem cylindricity. This achieves the goal of detecting valve top verticality, stem cylindricity, and bottom runout in a single clamping operation. Compared to existing technologies that require at least two clamping operations for valve testing, this invention significantly improves work efficiency.

[0015] Meanwhile, the arc-shaped plate in this invention can clamp the connecting rod more firmly; at the same time, the cooperation between the arc-shaped plate and the clamping block of the same specification in this invention can prevent the connecting rod from being pulled out of the three-jaw chuck when the valve is pulled off the suction cup. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an engine valve detection clamping device according to the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of an engine valve detection clamping device according to this utility model when the three-jaw chuck is in the clamping state;

[0018] Figure 3 This is a schematic diagram of the structure of the three-jaw chuck of the engine valve detection clamping device of this utility model when it is in the released state;

[0019] Figure 4 This is a schematic diagram of the connection structure of the connecting rod and suction cup of an engine valve detection clamping device according to this utility model.

[0020] In the attached diagram: 1. Roundness gauge; 11. Worktable; 12. Three-jaw chuck; 13. Curved plate; 14. Protective cover;

[0021] 2. Connecting rod; 21. Clamping block;

[0022] 3. Suction cup; 31. Screw;

[0023] 4. Valve. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. In the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily obscuring the concept of this utility model.

[0025] First refer to Figure 1 , Figure 2 and Figure 3 As can be seen, the present invention includes a roundness tester 1. The roundness tester 1 has a drive motor with its output shaft facing upward on its worktable 11. The drive motor is covered with a protective cover 14. The top of the protective cover 14 has a through hole corresponding to the position of the output shaft of the drive motor. The output shaft of the drive motor passes through the through hole and extends to the top of the protective cover 14. The output shaft of the drive motor is fixedly connected to a three-jaw chuck 12. Each jaw of the three-jaw chuck 12 is fixedly connected to an arc-shaped plate 13 that cooperates with the connecting rod 2.

[0026] Continue to refer to Figure 1 , Figure 2 and Figure 3 It is understood that this utility model also includes a vertical connecting rod 2 connected to the three-jaw chuck 12. The top of the connecting rod 2 is provided with an upward-facing suction cup 3. The diameter of the opening end of the suction cup 3 is smaller than the diameter of the bottom end of the valve head 4. The connection between the suction cup 3 and the connecting rod 2 is specifically referenced... Figure 4 It can be seen that the suction cup 3 is a screw suction cup 3 commonly used in the prior art. At the same time, the top of the connecting rod 2 is provided with an internal thread hole that matches the screw of the suction cup 3. Through the mutual cooperation between the screw of the suction cup 3 and the internal thread hole of the connecting rod 2, the suction cup 3 and the connecting rod 2 are fixedly connected together.

[0027] refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 It can be seen that the connecting rod 2 of this utility model is fixedly sleeved with an annular clamping block 21 on its side wall. The diameter of the clamping block 21 is smaller than the diameter of the circle formed by the arc plate 13 when the three-jaw chuck 12 is in the released state, and at the same time, the diameter of the clamping block 21 is larger than the diameter of the circle formed by the arc plate 13 when the three-jaw chuck 12 is in the clamping state; continue to refer to Figure 1 , Figure 2 and Figure 3 It can be seen that when the connecting rod 2 is clamped on the three-jaw chuck 12, the bottom end of the connecting rod 2 is in contact with the end face of the three-jaw chuck 12. When the three-jaw chuck 12 is in the clamping state, the arc plate 13 is in contact with the side wall of the connecting plate. At this time, the clamping block 21 is located below the arc plate 13, and the top of the clamping block 21 is in contact with the bottom of the arc plate 13.

[0028] The working principle of the engine valve detection clamping device in this embodiment is as follows: When this utility model is not in use, the connecting rod 2 is first clamped on the three-jaw chuck 12. At this time, the clamping block 21 is located below the arc plate 13, and the top of the clamping block 21 is in contact with the bottom of the arc plate 13.

[0029] When using this invention, the valve 4 is held head-down and adsorbed onto the coaxial suction cup 3. Since the diameter of the opening of the suction cup 3 is smaller than the diameter of the bottom of the valve 4 head, by adsorbing the bottom of the valve 4 head onto the suction cup 3, a portion of the bottom of the valve 4 head still protrudes from the suction cup 3. Figure 2 As shown, the roundness tester 1 can be used to conveniently detect the runout of the bottom surface of the valve 4, and can also be used to simultaneously detect the cylindricity of the valve stem and the verticality of the top of the valve 4. After the valve 4 is tested, the tester manually separates the valve 4 from the suction cup 3. When separating the valve 4 from the suction cup 3, the valve 4 needs to be pulled upward. When the valve 4 and the suction cup 3 are not separated, pulling the valve 4 upward can drive the suction cup 3 and the connecting rod 2 to move upward. At this time, since the arc plate 13 and the clamping block 21 are in contact with each other, the arc plate 13 can prevent the connecting rod 2 from moving upward, preventing the connecting rod 2 from disengaging from the three-jaw chuck 12, thus facilitating the next use of the roundness tester 1.

[0030] In the above embodiments, this utility model provides an engine valve detection clamping device. Since the diameter of the suction cup opening is smaller than the diameter of the valve head bottom, the bottom of the valve head is adsorbed onto the suction cup, and a portion of the bottom of the valve head still protrudes from the suction cup. This facilitates the detection of valve runout. Simultaneously, the valve is adsorbed onto the suction cup, thereby clamping the valve onto the roundness tester, which facilitates the detection of valve top verticality and stem cylindricity. This achieves the goal of detecting valve top verticality, stem cylindricity, and bottom runout with a single clamping. Compared to the prior art, which requires at least two clamping operations for valve detection, this utility model improves work efficiency.

[0031] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the design concept of the present invention should fall within the protection scope of the present invention. The technical content for which protection is sought in the present invention has been fully described in the claims.

Claims

1. An engine valve detection clamping device, comprising a three-jaw chuck (12) arranged on a roundness tester (1) worktable (11) and capable of self-rotation, characterized in that: The three-jaw chuck (12) detachably clamps a vertical connecting rod (2), a top end of the connecting rod (2) is detachably connected with a suction disc (3) coaxially arranged with the connecting rod (2), and a diameter of an opening end of the suction disc (3) is smaller than a diameter of a bottom end of a head of the valve (4).

2. An engine valve inspection clamp as defined in claim 1 wherein: An arc-shaped plate (13) matched with the connecting rod (2) is detachably connected to each jaw of the three-jaw chuck (12) away from an end of the three-jaw chuck (12).

3. An engine valve inspection clamp as defined in claim 2 wherein: A clamping block (21) matched with the arc-shaped plate (13) is coaxially fixed on a side wall of the connecting rod (2).

4. An engine valve inspection clamp as defined in claim 3 wherein: The diameter of the clamping block (21) is smaller than a diameter of a circle formed by the arc-shaped plate (13) when the three-jaw chuck (12) is in a loosened state, and the diameter of the clamping block (21) is greater than a diameter of a circle formed by the arc-shaped plate (13) when the three-jaw chuck (12) is in a clamped state.

5. An engine valve inspection clamp as defined in claim 1 wherein: An internally threaded hole is formed in the top end of the connecting rod (2), and a screw rod matched with the internally threaded hole is arranged on the bottom of the suction disc (3).

6. An engine valve inspection clamp as defined in claim 1 wherein: A driving motor for driving the three-jaw chuck (12) to rotate is arranged on a workbench (11) of the roundness tester (1), and the three-jaw chuck (12) is arranged above the driving motor and fixedly connected with an output shaft of the driving motor.

7. The engine valve inspection clamp of claim 6, wherein: A protective cover (14) for protecting the driving motor is arranged on the workbench (11) of the roundness tester (1), and the output shaft of the driving motor penetrates a top portion of the protective cover (14) and is connected with the three-jaw chuck (12).

8. The engine valve inspection clamp of claim 7, wherein: A through hole for penetrating the output shaft of the driving motor is formed in the top portion of the protective cover (14).

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