Anti-collision buffering structure of hydraulic oil cylinder of grinding machine

Abstract

The anti-collision buffering structure comprises a cylinder body, a piston and a piston rod, the cylinder body is installed on a cylinder base, the piston is installed in the cylinder body in a sliding mode, one end of the piston rod is fixedly connected with the piston, and the other end of the piston rod extends out of the cylinder base through a penetrating hole of the cylinder base. The penetrating holes comprise a shaft hole I, a shaft hole II and a shaft hole III; the piston rod penetrates through the shaft hole I and the shaft hole II and is in sliding fit with the shaft hole III; the inner end of the cylinder seat is inwards provided with a pipe hole I which is located above the shaft hole I and parallel to the shaft hole I. The pipe hole I is communicated with a pipe hole II which is laterally formed in the cylinder seat, the lower portion of the shaft hole I is communicated with a pipe hole III which is laterally formed in the same side in the cylinder seat, and the pipe hole II and the pipe hole III are communicated through an upper hole channel, a lower hole channel and a pipe hole IV. An upper spring, a lower spring and a sliding pin are arranged in the hole channel, and the sliding pin downwards presses the steel ball on the pipe hole IV under the action of the spring so as to seal an oil way formed by the pipe holes. The hydraulic oil cylinder is simple in structure and reliable in work, the service life of the hydraulic oil cylinder is prolonged, and the safety is improved.

Description

Technical Field

[0001] The utility model relates to the structure of a hydraulic component, in particular to an anti-collision buffer structure for a hydraulic cylinder of a grinding machine. Background Technique

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging). Its structure is simple and it works reliably. When realizing reciprocating motion, a deceleration device can be omitted, and there is no transmission gap, so the motion is stable. It is a hydraulic component with strong working stability that can convert hydraulic energy into mechanical energy to push an object to perform reciprocating motion, and is widely used in the hydraulic system of a grinding machine.

[0003] During the working process of the hydraulic cylinder in a grinding machine, the piston realizes continuous reciprocating motion. When the piston rod of the existing hydraulic cylinder extends and retracts to the limit position and the workbench changes direction, due to the reason of the stroke, the piston will collide with the bottom or the head of the cylinder. If it collides for a long time and many times, it will cause damage to the hydraulic cylinder (such as piston detachment, scratching of the inner diameter of the cylinder barrel, bending or breaking of the piston rod, etc.), reducing the service life of the hydraulic cylinder and affecting the grinding accuracy.

[0004] When the existing hydraulic cylinder is in use, due to the lack of effective protection measures, when the hydraulic cylinder is damaged, the installation and disassembly are time-consuming and laborious. Content of the Utility Model

[0005] Aiming at the deficiencies of the existing technology, the utility model provides an anti-collision buffer structure for a hydraulic cylinder of a grinding machine that can effectively prevent the piston from being damaged due to the collision between the piston and the cylinder seat during rapid operation.

[0006] The anti-collision buffer structure of the hydraulic cylinder of the grinding machine that can solve the problems of the existing technology includes a cylinder body, a piston and a piston rod. The cylinder body is installed on a cylinder seat. The piston is slidably installed in the cylinder body. One end of the piston rod is fixedly arranged in the piston, and the other end extends outside the cylinder seat through a through hole opened inside the cylinder seat. The difference is as follows:

[0007] 1. The through hole includes a shaft hole I, a shaft hole II and a shaft hole III from inside to outside. The shaft hole I is smaller than the shaft hole II and larger than the shaft hole III.

[0008] 2. The piston rod passes through the shaft hole I and the shaft hole II and is slidably matched with the shaft hole III.

[0009] 3. An inner end of the cylinder base is provided with a pipe hole I above and parallel to the shaft hole I. The pipe hole I communicates with a pipe hole II laterally opened inside the cylinder base. A lower part of the shaft hole I communicates with a pipe hole III laterally opened on the same side inside the cylinder base. The pipe hole II and the pipe hole III are communicated through upper and lower channels and a pipe hole IV. Springs and sliding pins are arranged in the channels. Under the action of the springs, the sliding pins press the steel balls downward against the pipe hole IV to close the oil circuit formed by the pipe holes.

[0010] Further, the shaft hole II communicates with an oil inlet / outlet hole laterally opened inside the cylinder base.

[0011] Advantages of the present utility model:

[0012] 1. The structure of the present utility model is simple and the work is reliable. It can effectively prevent the piston of the hydraulic cylinder from hitting the cylinder base, avoid damage to the hydraulic cylinder, improve the service life, reliability and safety of the hydraulic cylinder, and the grinding machine can operate for a long time without failure.

[0013] 2. The present utility model reduces the impact during the commutation of the workbench of the grinding machine, can achieve low-roughness grinding, reduces the waviness, and improves the grinding quality of the workpiece. Description of the drawings

[0014] Figure 1 It is a schematic structural diagram of an embodiment of the present utility model.

[0015] Figure 2 is Figure 1 the A-A sectional view in

[0016] Figure 3 is Figure 1 the B-B sectional view in

[0017] Drawing number identification: 1. Cylinder body; 2. Piston; 3. Piston rod; 4. Cylinder base; 4-1. Shaft hole I; 4-2. Shaft hole II; 4-3. Pipe hole I; 4-4. Pipe hole II; 4-5. Pipe hole III; 4-6. Pipe hole IV; 4-7. Oil inlet / outlet hole; 4-8. Oil inlet / outlet pipe port; 5. Sliding pin; 6. Spring; 7. Steel ball; 8. Sealing seat cover; 9. Plug. Detailed implementation manners

[0018] The technical solutions of the present utility model will be further described below in conjunction with the embodiments shown in the drawings.

[0019] The anti-collision buffer structure of the hydraulic cylinder of the utility model grinding machine includes a cylinder block 1, a piston 2, a piston rod 3 and a cylinder seat 4. The rear end of the cylinder block 1 is an oil inlet and outlet pipe port 4-8. The front end of the cylinder block 1 is sleeved and sealed at the rear end of the cylinder seat 4. The piston 2 is slidably installed in the cylinder block 1. The rear end of the piston rod 3 is fixedly arranged inside the piston 2 through perforation. The front part of the piston rod 3 extends outside the front end of the cylinder seat 4 through a perforation hole formed inside the cylinder seat 4. A sealing seat cover 8 sleeved on the piston rod 3 is installed at the front end of the cylinder seat 4, as Figure 1 shown.

[0020] The perforation hole includes a shaft hole I 4-1, a shaft hole II 4-2 and a shaft hole III which are coaxially opened inward from the rear end face to the front end face of the cylinder seat 4. The aperture of the shaft hole I 4-1 is smaller than that of the shaft hole II 4-2 and larger than that of the shaft hole III. The shaft hole I 4-1 and the piston rod 3 form an annular oil passage I. The shaft hole II 4-2 and the piston rod 3 form an annular oil passage II. The annular oil passage II is communicated with the annular oil passage I. The shaft hole III is in sliding fit with the piston rod 3, as Figure 1 , Figure 2 , Figure 3 shown.

[0021] An oil inlet and outlet hole 4-7 is opened inward on the right end face of the cylinder seat 4. The oil inlet and outlet hole 4-7 is communicated with the annular oil passage II, as Figure 3 shown.

[0022] A pipe hole I 4-3 is opened inward on the rear end face of the cylinder seat 4. The pipe hole I 4-3 is directly above the shaft hole I 4-1 and parallel to the shaft hole I 4-1. The length of the pipe hole I 4-3 is smaller than that of the shaft hole I 4-1. A pipe hole II 4-4 is opened inward on the left end face of the cylinder seat 4. The inner end of the pipe hole II 4-4 is communicated with the front end of the pipe hole I 4-3. The outer end of the pipe hole II 4-4 is plugged. A pipe hole III 4-5 is opened inward on the left end face of the cylinder seat 4 below the pipe hole II 4-4. The inner end of the pipe hole III 4-5 is communicated with the lower part of the annular oil passage I. The outer end of the pipe hole III 4-5 is plugged; for the upper and lower pipe holes II 4-4 and pipe holes III 4-5, an upper and lower coaxial hole passage and a pipe hole IV 4-6 are opened inward on the left side of the upper end face of the cylinder seat 4. The aperture of the hole passage is larger than that of the pipe hole IV 4-6 and the length of the hole passage is also larger than that of the pipe hole IV 4-6. The upper end of the hole passage is plugged by a plug 9. A sliding pin 5 and a steel ball 7 are arranged up and down in the hole passage. A spring 6 is press-fitted between the sliding pin 5 and the plug 9. The elastic force of the spring 6 acts downward on the sliding pin 5. The sliding pin 5 presses the steel ball 7 downward against the upper end pipe orifice of the pipe hole IV 4-6 to close the pipe hole IV 4-6, as Figure 2 shown.

[0023] The operation mode of the utility model is as follows:

[0024] The inlet and outlet oil pipe openings 4-8 of the cylinder block 1 intake oil while the inlet and outlet oil holes 4-7 return oil. When the piston 2 moves forward rapidly and approaches the cylinder seat 4, the reversing solenoid valve is energized and the signal lamp lights up. Due to the inertia of the hydraulic stroke, the piston 2 still moves forward rapidly and may collide with the cylinder seat 4. At this time, the hydraulic oil enters through the pipe hole III 4-5, then through the pipe hole IV 4-6 and pushes the steel ball 7 upward. The hydraulic oil enters the pipe hole II 4-4 through the hole passage, and then through the pipe hole I 4-3 to reach the rear end of the cylinder seat 4, that is, the front end of the piston 2, thereby forming an effective anti-collision buffer resistance and ensuring that the piston 2 does not collide with the cylinder seat 4 before the end of the commutation.

Claims

1. Anti-collision and buffer structure of a grinding machine hydraulic cylinder, comprising a cylinder block (1), a piston (2) and a piston rod (3). The cylinder block (1) is installed on a cylinder seat (4). The piston (2) is slidably installed inside the cylinder block (1). One end of the piston rod (3) is fixedly arranged inside the piston (2), and the other end extends outside the cylinder seat (4) through a through hole opened inside the cylinder seat (4). It is characterized in that: The through hole includes a shaft hole I (4-1), a shaft hole II (4-2) and a shaft hole III from the inside to the outside. The shaft hole I (4-1) is smaller than the shaft hole II (4-2) and larger than the shaft hole III; The piston rod (3) passes through the shaft hole I (4-1) and the shaft hole II (4-2) and is in sliding fit with the shaft hole III; An inner end of the cylinder seat (4) is internally provided with a pipe hole I (4-3) above and parallel to the shaft hole I (4-1). The pipe hole I (4-3) is communicated with a pipe hole II (4-4) laterally opened inside the cylinder seat (4). The lower part of the shaft hole I (4-1) is communicated with a pipe hole III (4-5) laterally opened on the same side inside the cylinder seat (4). The pipe hole II (4-4) and the pipe hole III (4-5) are communicated through upper and lower channels and a pipe hole IV (4-6). Springs (6) and sliding pins (5) are arranged in the upper and lower parts of the channel. Under the action of the spring (6), the sliding pin (5) presses a steel ball (7) downward to press tightly on the pipe hole IV (4-6) to close the oil circuit formed by each pipe hole.

2. The anti-collision buffer structure of the grinding machine hydraulic cylinder according to claim 1, wherein: The shaft hole II (4-2) is communicated with an oil inlet and outlet hole (4-7) laterally opened inside the cylinder seat (4).

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