Valve rod correcting mechanism

Abstract

The utility model relates to the technical field of valve rod machining, and discloses a valve rod correcting mechanism which comprises a fixing bottom plate, a fixing frame is fixedly connected to the upper portion of the fixing bottom plate, a sliding block is connected to the inner side of the fixing frame in a sliding mode, an air cylinder is fixedly installed at the bottom of the inner side of the fixing frame, and the output end of the air cylinder is fixedly connected with the sliding block. A connecting plate is fixedly connected to the front face of the sliding block, a grinding assembly is fixedly installed at the bottom of the connecting plate, and a clamping and fixing mechanism and a cooling and dust falling mechanism are arranged above the fixed bottom plate. According to the valve rod correcting mechanism, the clamping and fixing mechanism is arranged, the valve rod is prevented from deviating in the polishing and correcting process, so that the polishing and correcting precision is improved, the cooling and dust falling mechanism is arranged, and the situation that heat generated in the polishing process causes deformation of the valve rod and influences the service life of a polishing head is prevented; and meanwhile, chippings and dust generated by grinding are settled through cooling water, and pollution to the environment is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of valve stem processing, in particular to a valve stem correction mechanism. Background Art

[0002] The intake and exhaust valves in automotive engines are both circular, consisting of a valve head and a valve stem. The top surface of the valve can be flat, concave, or convex. Currently, the most widely used type is the flat-top valve, which features a simple structure and a small heat-exposed surface, and can be used for both intake and exhaust valves. Because the valve stem controls the opening and closing of the engine valve, it requires very high precision. After initial stamping and forming in the mold, the valve stem needs to be calibrated to ensure that the precision meets actual usage requirements.

[0003] According to Chinese patent publication number CN 212145786 U, a valve stem correction mechanism is disclosed, comprising a lifting device, a guide support, a sliding platform, a base, a sliding seat, and a correction wheel device. The sliding platform is mounted on the guide support, and the sliding platform and the guide support are slidably engaged. The lifting device is mounted on the lower portion of the guide support, and the lifting end of the lifting device is connected to the sliding platform. The base is mounted on the top of the sliding platform, and the base is mounted on the upper surface of the sliding platform. A first guide rail is provided on the base, and the sliding platform is mounted on the first guide rail. The first push-pull device is capable of pushing the sliding seat, so that the correction wheel of the correction wheel device is pressed against the valve stem head, adjusting the flatness of the correction wheel end. Compared with traditional manual grinding and calibration using a grinding wheel, this saves labor and reduces the operating burden on workers.

[0004] However, the valve stem correction mechanism does not have a stable clamping and fixing mechanism to clamp and fix the valve stem, which makes the valve stem easily shifted during the grinding and calibration process, thereby affecting the accuracy of the grinding and calibration. At the same time, heat is generated during the grinding process, causing deformation of the valve stem and affecting the service life of the grinding head. For this reason, we propose a valve stem correction mechanism. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a valve stem correction mechanism.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a valve stem correction mechanism, comprising a fixed base plate, a fixed frame fixedly connected to the top of the fixed base plate, a slider slidably connected to the inner side of the fixed frame, a cylinder fixedly installed on the inner bottom of the fixed frame, the output end of the cylinder is fixedly connected to the slider, the front of the slider is fixedly connected to a connecting plate, a grinding assembly is fixedly installed on the bottom of the connecting plate, and a clamping and fixing mechanism and a cooling and dust reduction mechanism are provided above the fixed base plate.

[0007] Preferably, a buffer support block is fixedly connected to the bottom of the fixed base plate. There are four buffer support blocks, which are evenly arranged at the four corners of the bottom of the fixed base plate. The buffer support blocks are provided to improve the overall stability of the mechanism.

[0008] Preferably, the clamping and fixing mechanism includes a fixing block, a mounting plate, a gear plate, a first connecting rod, a second connecting rod, a third connecting rod, a clamping block and a first motor, the fixing block is fixedly connected above the fixed base plate, the mounting plate is fixedly installed above the fixed block, the number of the mounting plates is two and the two mounting plates are arranged in parallel, the gear plate is rotatably connected to the mounting plate through a bearing, one end of the first connecting rod is fixedly connected to the gear plate, one end of the second connecting rod is hinged to the two mounting plates, the third connecting rod is hinged to the other end of the first connecting rod and the second connecting rod, the clamping block is fixedly connected to the side of the third connecting rod, and the clamping block is driven to move through the linkage of the first connecting rod, the second connecting rod and the third connecting rod.

[0009] Preferably, the number of the gear plate, the first connecting rod, the second connecting rod, the third connecting rod and the clamping block are all two and the two gear plates are meshed with each other. The first motor is fixedly installed above the mounting plate, and the output end of the first motor is fixedly connected to the gear plate through a coupling, and the two gear plates are driven to rotate in opposite directions by the first motor.

[0010] Preferably, the cooling and dust reduction mechanism includes a fixed frame, a second motor, a screw, a threaded sleeve, a connecting box, a water tank, a connecting pipe and a nozzle. The fixed frame is fixedly connected to the top of the fixed base plate, and the second motor is fixedly installed above the fixed frame. The output end of the second motor is fixedly connected to the screw through a coupling, and the two ends of the screw are rotatably connected to the inner side of the fixed frame through bearings. The threaded sleeve is threadedly connected to the outer wall of the screw and the threaded sleeve is fitted with the inner side of the fixed frame. The screw is driven to rotate by the second motor, thereby causing the threaded sleeve to move.

[0011] Preferably, the connecting box is fixedly connected to the right side of the threaded sleeve, the water tank is fixedly installed above the fixed base plate, the two ends of the connecting pipe are respectively connected to the water tank and the connecting box, the nozzle is fixedly installed on the right side of the connecting box and the nozzle is connected to the connecting box, and the cooling water in the water tank is sprayed out through the nozzle.

[0012] Compared with the prior art, the present invention provides a valve stem correction mechanism with the following beneficial effects:

[0013] 1. This valve stem correction mechanism, by setting a clamping and fixing mechanism, stably clamps and fixes the valve stem, preventing the valve stem from positional deviation during the grinding and calibration process, thereby improving the accuracy of the grinding and calibration and improving the efficiency of the grinding and calibration.

[0014] 2. This valve stem correction mechanism is equipped with a cooling and dust reduction mechanism. The nozzle sprays cooling water to cool the grinding head and valve stem to prevent the heat generated during the grinding process from causing deformation of the valve stem and affecting the service life of the grinding head. At the same time, the cooling water settles the debris and dust generated by grinding to prevent pollution to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the utility model from a top view;

[0018] Figure 3 This is an enlarged view of point A of the present utility model;

[0019] Figure 4 It is an enlarged view of point B of the present utility model.

[0020] In the figure: 1. Fixed base plate; 2. Buffer support block; 3. Fixed frame; 4. Slider; 5. Cylinder; 6. Connecting plate; 7. Grinding assembly; 8. Clamping and fixing mechanism; 801. Fixed block; 802. Mounting plate; 803. Gear plate; 804. First connecting rod; 805. Second connecting rod; 806. Third connecting rod; 807. Clamping block; 808. First motor; 9. Cooling and dust reduction mechanism; 901. Fixed frame; 902. Second motor; 903. Screw; 904. Threaded sleeve; 905. Connecting box; 906. Water tank; 907. Connecting pipe; 908. Nozzle. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] like Figure 1-4As shown, the utility model provides a valve stem correction mechanism, including a fixed base plate 1, a fixed frame 3 is fixedly connected to the top of the fixed base plate 1, a slider 4 is slidably connected to the inner side of the fixed frame 3, a cylinder 5 is fixedly installed on the inner bottom of the fixed frame 3, the output end of the cylinder 5 is fixedly connected to the slider 4, the front of the slider 4 is fixedly connected to a connecting plate 6, a grinding assembly 7 is fixedly installed on the bottom of the connecting plate 6, and a clamping and fixing mechanism 8 and a cooling and dust reduction mechanism 9 are arranged above the fixed base plate 1.

[0023] The bottom of the fixed base plate 1 is fixedly connected with a buffer support block 2. There are four buffer support blocks 2 and they are evenly arranged at the four corners of the bottom of the fixed base plate 1. The buffer support blocks 2 are provided to improve the overall stability of the mechanism.

[0024] The clamping and fixing mechanism 8 includes a fixed block 801, a mounting plate 802, a gear plate 803, a first connecting rod 804, a second connecting rod 805, a third connecting rod 806, a clamping block 807 and a first motor 808. The fixed block 801 is fixedly connected to the top of the fixed base plate 1, and the mounting plate 802 is fixedly installed above the fixed block 801. There are two mounting plates 802 and the two mounting plates 802 are arranged in parallel. The gear plate 803 is rotatably connected to the mounting plate 802 through a bearing. One end of the first connecting rod 804 is fixedly connected to the gear plate 803, one end of the second connecting rod 805 is hinged to the two mounting plates 802, and the third connecting rod 806 is hinged to the other end of the first connecting rod 804 and the second connecting rod 805. The clamping block 807 is fixedly connected to the side of the third connecting rod 806, and the clamping block 807 is driven to move through the linkage of the first connecting rod 804, the second connecting rod 805 and the third connecting rod 806.

[0025] There are two gear plates 803, first connecting rod 804, second connecting rod 805, third connecting rod 806 and clamping block 807, and the two gear plates 803 are meshed with each other. The first motor 808 is fixedly installed above the mounting plate 802. The output end of the first motor 808 is fixedly connected to the gear plate 803 through a coupling, and the two gear plates 803 are driven to rotate in opposite directions by the first motor 808.

[0026] In this embodiment, the valve stem is stably clamped and fixed by providing a clamping and fixing mechanism 8 to prevent the valve stem from positional displacement during the grinding and calibration process, thereby improving the accuracy of the grinding and calibration and improving the efficiency of the grinding and calibration.

[0027] like Figure 1-4As shown, on the basis of Example 1, the utility model provides a technical solution: the cooling and dust reduction mechanism 9 includes a fixed frame 901, a second motor 902, a screw 903, a threaded sleeve 904, a connecting box 905, a water tank 906, a connecting pipe 907 and a nozzle 908, the fixed frame 901 is fixedly connected to the top of the fixed base plate 1, the second motor 902 is fixedly installed above the fixed frame 901, the output end of the second motor 902 is fixedly connected to the screw 903 through a coupling, and the two ends of the screw 903 are rotatably connected to the inner side of the fixed frame 901 through bearings, the threaded sleeve 904 is threadedly connected to the outer wall of the screw 903 and the threaded sleeve 904 is in contact with the inner side of the fixed frame 901, and the screw 903 is driven to rotate by the second motor 902, so that the threaded sleeve 904 moves.

[0028] The connecting box 905 is fixedly connected to the right side of the threaded sleeve 904, the water tank 906 is fixedly installed above the fixed base plate 1, and the two ends of the connecting pipe 907 are respectively connected to the water tank 906 and the connecting box 905. The nozzle 908 is fixedly installed on the right side of the connecting box 905 and the nozzle 908 is connected to the connecting box 905. The cooling water in the water tank 906 is sprayed out through the nozzle 908.

[0029] In this embodiment, by setting up a cooling and dust reduction mechanism 9, the nozzle 908 sprays cooling water to cool the grinding head and the valve stem to prevent the heat generated during the grinding process from causing deformation of the valve stem and affecting the service life of the grinding head. At the same time, the cooling water settles the debris and dust generated by grinding to prevent pollution to the environment.

[0030] The working principle of this valve stem correction mechanism is described in detail below.

[0031] like Figure 1-4 As shown, when in use, the valve stem is placed between the two clamping blocks 807, and the first motor 808 is started to drive the gear plate 803 to rotate. Since the two gear plates 803 are meshed with each other, the two gear plates 803 rotate in opposite directions. Through the hinged connection of the first connecting rod 804, the second connecting rod 805 and the third connecting rod 806, the two clamping blocks 807 are driven to approach each other, thereby clamping and fixing the valve stem, starting the cylinder 5 to drive the slider 4 to move, and at the same time drive the grinding assembly 7 to move up and down, adjust the grinding assembly 7 to a suitable height, and start the grinding assembly 7 for grinding correction; during the grinding correction process, start the second motor 902 to drive the screw 903 to rotate, so that the threaded sleeve 904 moves and drives the connecting box 905 and the nozzle 908 to move, and align the nozzle 908 with the grinding correction position, and the cooling water in the water tank 906 enters the connecting box 905 through the connecting pipe 907, and is then sprayed out through the nozzle 908 to achieve the effect of cooling and dust reduction.

Claims

1. A valve stem correction mechanism, comprising a fixed base plate (1), characterized in that: A fixed frame (3) is fixedly connected to the top of the fixed base plate (1), a slider (4) is slidably connected to the inner side of the fixed frame (3), a cylinder (5) is fixedly installed on the inner bottom of the fixed frame (3), an output end of the cylinder (5) is fixedly connected to the slider (4), a connecting plate (6) is fixedly connected to the front side of the slider (4), a grinding assembly (7) is fixedly installed on the bottom of the connecting plate (6), and a clamping and fixing mechanism (8) and a cooling and dust reduction mechanism (9) are arranged on the top of the fixed base plate (1).

2. A valve stem correction mechanism according to claim 1, characterized in that: The bottom of the fixed bottom plate (1) is fixedly connected with a buffer support block (2), and the buffer support blocks (2) are four in number and are evenly arranged at the four corners of the bottom of the fixed bottom plate (1).

3. A valve stem correction mechanism according to claim 1, characterized in that: The clamping and fixing mechanism (8) comprises a fixing block (801), a mounting plate (802), a gear plate (803), a first connecting rod (804), a second connecting rod (805), a third connecting rod (806), a clamping block (807) and a first motor (808), wherein the fixing block (801) is fixedly connected above the fixing base plate (1), the mounting plate (802) is fixedly mounted above the fixing block (801), and the number of the mounting plates (802) is two and the two mounting plates are The plates (802) are arranged in parallel, the gear plate (803) is rotatably connected to the mounting plate (802) via a bearing, one end of the first connecting rod (804) is fixedly connected to the gear plate (803), one end of the second connecting rod (805) is hinged to the two mounting plates (802), the third connecting rod (806) is hinged to the other ends of the first connecting rod (804) and the second connecting rod (805), and the clamping block (807) is fixedly connected to the side of the third connecting rod (806).

4. A valve stem correction mechanism according to claim 3, characterized in that: The number of the gear plate (803), the first connecting rod (804), the second connecting rod (805), the third connecting rod (806) and the clamping block (807) is two, and the two gear plates (803) are meshed with each other. The first motor (808) is fixedly mounted above the mounting plate (802), and the output end of the first motor (808) is fixedly connected to the gear plate (803) via a coupling.

5. A valve stem correction mechanism according to claim 1, characterized in that: The cooling and dust reduction mechanism (9) comprises a fixed frame (901), a second motor (902), a screw (903), a threaded sleeve (904), a connecting box (905), a water storage tank (906), a connecting pipe (907) and a nozzle (908); the fixed frame (901) is fixedly connected to the top of the fixed base plate (1); the second motor (902) is fixedly installed on the top of the fixed frame (901); the output end of the second motor (902) is fixedly connected to the screw (903) via a coupling; both ends of the screw (903) are rotatably connected to the inner side of the fixed frame (901) via bearings; the threaded sleeve (904) is threadedly connected to the outer wall of the screw (903) and the threaded sleeve (904) fits the inner side of the fixed frame (901).

6. A valve stem correction mechanism according to claim 5, characterized in that: The connecting box (905) is fixedly connected to the right side of the threaded sleeve (904); the water storage tank (906) is fixedly installed above the fixed bottom plate (1); the two ends of the connecting pipe (907) are respectively connected to the water storage tank (906) and the connecting box (905); the nozzle (908) is fixedly installed on the right side of the connecting box (905) and the nozzle (908) is connected to the connecting box (905).

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