Valve rod end face grinding machine

Abstract

The utility model discloses a valve rod end face grinding machine which comprises a mounting plate, a grinding device is arranged on the mounting plate and comprises a motor and a grinding head connected with the motor, and a driving unit is arranged between the grinding head and an output shaft of the motor. The driving unit comprises a spline shaft connected with the output shaft and a spline sleeve connected with the grinding head, an elastic piece is connected between the motor and the grinding head, and the elastic piece is used for enabling the grinding head to continuously move away from the motor. Through combination of spline transmission and the elastic piece, the distance between the grinding head and the end face of the valve rod body is automatically adjusted, valve rods with different lengths rapidly correspond to the length of the grinding head, and the grinding efficiency is improved. And meanwhile, the cam driving positioning device is simple in structure, reliable in clamping and convenient to operate. And an electromagnetic auxiliary reset mechanism improves the equipment response speed and the working efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to a grinding machine technical field especially a valve stem end face grinding machine. BACKGROUND

[0002] In the valve stem manufacturing process, end face grinding is the key process to ensure valve sealing and assembly accuracy. The traditional grinding machine usually adopts fixed grinding head structure, and the distance between the grinding head and the valve stem end face cannot be self-adaptively adjusted according to the length of the valve stem. For valve stems of different lengths, the operator needs to manually adjust the position of the grinding head, which not only increases the operation complexity, but also easily leads to unstable grinding quality due to adjustment errors. SUMMARY

[0003] The utility model provides a valve stem end face grinding machine in view of the prior art's insufficient.

[0004] To solve the above technical problems, the utility model discloses the following technical scheme: a valve stem end face grinding machine includes a mounting plate, the mounting plate is provided with a grinding device, the grinding device includes a motor and a grinding head connected with the motor, a drive unit is arranged between the grinding head and the output shaft of the motor, the drive unit includes a spline shaft connected with the output shaft and a spline sleeve connected with the grinding head, an elastic member is connected between the motor and the grinding head, and the elastic member is used for the grinding head to continuously move away from the motor.

[0005] In the above scheme, preferably, the grinding head is connected with the sleeve through the connecting piece, the sleeve is provided with a first folded edge, and the spline sleeve is arranged at the first folded edge.

[0006] In the above scheme, preferably, the spline shaft bottom matches the first folded edge and is provided with a protrusion, and the protrusion is used to limit the first folded edge.

[0007] In the above scheme, preferably, the mounting plate bottom is provided with a positioning device, the positioning device includes a first positioning block, a second positioning block, a sliding rod and a return spring, the first positioning block is fixedly provided with a sliding rod, the second positioning block is slidably arranged on the sliding rod, the return spring is arranged through the sliding rod and between the first positioning block and the second positioning block, and the valve stem body is placed between the first positioning block and the second positioning block.

[0008] In the above scheme, preferably, one side of the second positioning block is provided with a cam, and the cam drives the second positioning block to lock the valve stem body against the return spring.

[0009] In the above scheme, preferably, a handle is arranged on the cam, and the handle drives the cam to rotate.

[0010] Preferably, the elastic member comprises a tube body and a rod body, a first spring is arranged between the rod body and the tube body, and the tube body drives the grinding head to move away from the valve rod body under the action of the first spring.

[0011] Preferably, the rod body is provided with an electromagnet, the tube body is provided with a magnetic member, the magnetic member and the electromagnet are arranged to be opposite in the same polarity, and the first magnet drives the tube body to move away from the first electromagnet after the electromagnet is electrified.

[0012] The utility model discloses the beneficial effects are: through the combination of spline drive and elastic member, realize the automatic regulation of the distance between the end face of grinding head and valve rod body, realize the length of quick corresponding grinding head of different valve rod, provide grinding efficiency. At the same time, the cam drive positioning device structure is simple, clamps reliably and is convenient to operate. Electromagnetic auxiliary reset mechanism improves the equipment response speed and working efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the perspective view of the utility model.

[0014] Figure 2 It is the front view of the utility model.

[0015] Figure 3 It is the internal structure diagram of the utility model.

[0016] Figure 4 It is the A place enlarged view of the utility model. Figure 3

[0017] Figure 5 It is the positioning device schematic view of the utility model.

[0018] Figure 6 It is the internal schematic view of the elastic member of the utility model. DETAILED DESCRIPTION

[0019] The utility model will be described further in detail in combination with the drawings and specific embodiment: refer to Figures 1-6 A valve rod end face grinding machine includes a positioning device and a grinding device, wherein the positioning device and the grinding device are both installed on the mounting plate 1, and the mounting plate 1 is fixedly provided with the positioning device at the bottom.

[0020] Further, the positioning device includes a first positioning block 11, a second positioning block 12, a slide rod 13 and a reset spring 14. The first positioning block 11 is fixed to the bottom surface of the mounting plate 1 by bolts, and the side wall is vertically welded with the slide rod 13. Meanwhile, the side wall is provided with an opening, and the opening is used to place the positioning rod, and the slide rod 13 is slidably connected with the second positioning block 12, and the second positioning block 12 is also provided with an opening, and the openings of the two groups of positioning blocks​

[0021] Further, the reset spring 14 is sleeved on the slide rod 13 and compressed between the first positioning block 11 and the second positioning block 12, and under the action of the elastic force of the reset spring 14, the second positioning block 12 is away from the first positioning block 11. At this time, the valve stem body 15 placed therebetween can be taken out at will. In addition, a cam 16 is arranged on one side of the second positioning block 12, the cam 16 rotates on one side of the second positioning block through a rotating shaft, and the outer edge of the cam 16 is in contact with the second positioning block 12. Moreover, a handle 17 is connected to the cam 16, and rotating the handle 17 can drive the cam 16 to rotate, so as to force the second positioning block 12 to slide along the slide rod 13 towards the first positioning block 11, thereby clamping the valve stem body 15 placed therebetween.

[0022] Further, the grinding device is installed above the mounting plate 1, and the grinding device comprises a motor 2, a grinding head 3 and a driving unit connecting the two. The motor 2 is fixed on the mounting plate 1 through a support, and the output shaft 4 thereof is connected with a spline shaft 5. The grinding head 3 is fixed through a connecting piece 7 and a sleeve 8, and the connecting piece 7, the grinding head 3 and the sleeve 8 rotate synchronously. Further, the sleeve 8 is provided with a first folded edge 9 extending radially at the top, and the first folded edge 9 is provided with a spline sleeve 6. The spline shaft 5 is matched and engaged with the spline sleeve 6 to realize the transmission of power from the motor 2 to the grinding head 3. Moreover, the spline shaft 5 is provided with an annular protrusion 10 at the bottom, which abuts against the first folded edge 9 when the grinding head 3 and the sleeve 8 move downward to limit the stroke and prevent the spline from disengaging.

[0023] The motor 2 housing and the grinding head 3 are connected with an elastic member, and the elastic member is used for continuously moving the grinding head 3 away from the motor 2. At the same time, in order to facilitate the elastic member to move the grinding head 3 away from the valve stem body 15 when the motor 2 is powered off.

[0024] The elastic member comprises a tube body 18 and a rod body 19, one end of the rod body 19 is fixed to a connecting sleeve 23 located on the output shaft 4, and the other end is inserted into the tube body 18. A first spring 20 is arranged between the rod body 19 and the tube body 18, and the other end of the tube body 18 is located on the connecting piece 7, so that the connecting sleeve 23 and the connecting piece 7 can rotate synchronously.

[0025] The first spring 20 pulls the pipe body 18 to drive the grinding head 3 to move close to the motor 2 in normal state, and the grinding head 3 is quickly reset. Further, the electromagnet 21 is embedded at the end of the rod body 19, the electromagnet 21 is electrically connected with the motor 2, and the two are synchronously powered on or powered off. The magnetic member 22 is fixed at the corresponding position in the pipe body 18, the magnetic member 22 can use a permanent magnet, and the two are arranged with the same polarity. When the electromagnet 21 is powered on, the repulsive force drives the pipe body 18 and the grinding head 3 to quickly move away from the motor 2, and the grinding head 3 has self-adaptive pressing force when contacting the end surface of the valve rod body 15. By rotating the grinding head 3, the end surface of the grinding head 3 of various lengths can be polished and cut.

[0026] The above examples are only used to illustrate the technical solutions of the present application, but not to limit it. Although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can be modified, or some technical features can be replaced by equivalent ones. The modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A valve stem end face grinding machine, characterized in that: The device includes a mounting plate (1), on which a grinding device is provided. The grinding device includes a motor (2) and a grinding head (3) connected to the motor (2). A drive unit is provided between the grinding head (3) and the output shaft (4) of the motor (2). The drive unit includes a spline shaft (5) connected to the output shaft (4) and a spline sleeve (6) connected to the grinding head (3). An elastic element is connected between the motor (2) and the grinding head (3). The elastic element is used to continuously move the grinding head (3) away from the motor (2).

2. The valve stem end face grinding machine according to claim 1, characterized in that: The grinding head (3) is connected to the kit (8) via a connector (7). The kit (8) has a first folded edge (9) and the spline sleeve (6) is located at the first folded edge (9).

3. A valve stem end face grinding machine according to claim 2, characterized in that: The bottom of the spline shaft (5) is provided with a protrusion (10) matching the first fold (9), and the protrusion (10) is used to restrict the first fold (9).

4. A valve stem end face grinding machine according to claim 1 or 3, characterized in that: The mounting plate (1) is provided with a positioning device at its bottom. The positioning device includes a first positioning block (11), a second positioning block (12), a slide rod (13), and a return spring (14). The slide rod (13) is fixed on the first positioning block (11). The second positioning block (12) is slidably arranged on the slide rod (13). The return spring (14) is arranged through the slide rod (13) and between the first positioning block (11) and the second positioning block (12). The valve stem body (15) is placed between the first positioning block (11) and the second positioning block (12).

5. A valve stem end face grinding machine according to claim 4, characterized in that: A cam (16) is provided on one side of the second positioning block (12). The cam (16) rotates and drives the second positioning block (12) to overcome the return spring (14) and lock the valve stem body (15).

6. A valve stem end face grinding machine according to claim 5, characterized in that: A handle (17) is provided on the cam (16), and the handle (17) drives the cam (16) to rotate.

7. A valve stem end face grinding machine according to claim 6, characterized in that: The elastic element includes a tube (18) and a rod (19). A first spring (20) is provided between the rod (19) and the tube (18). Under the action of the first spring (20), the tube (18) drives the grinding head (3) to move away from the valve stem body (15).

8. A valve stem end face grinding machine according to claim 7, characterized in that: An electromagnet (21) is provided on the rod (19), and a magnetic component (22) is provided in the tube (18). The magnetic component (22) and the electromagnet (21) are arranged opposite each other with the same pole. When the electromagnet (21) is energized, the first magnet drives the tube (18) to move away from the first electromagnet (21).

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