TWM615642U - Cushioning hydraulic cylinder structure - Google Patents

Abstract

The buffer hydraulic cylinder structure of this creation includes a hydraulic cylinder body with an oil chamber inside, one side of the hydraulic cylinder body is provided with an oil inlet and outlet, and the upper part of the hydraulic cylinder body is provided with a perforation. A piston body includes a rod part and a piston part integrally formed, the rod part is arranged on one side of the piston part, and the piston part is arranged in the oil chamber to divide the oil chamber into upper and lower spaces. A top plate is arranged at one end of the rod.

Description

Buffer hydraulic cylinder structure

This creation is related to the cushioning equipment used in stamping, especially a cushioning hydraulic cylinder structure.

In the stamping process, a buffer cylinder is needed to withstand the pressure of the die pressing during stamping. As shown in Figure 1, the structure of the general buffer cylinders on the market mostly includes a hydraulic cylinder 1 and an oil chamber 2. A piston 3 is provided in the oil chamber 2. A piston rod 4 penetrates into the hydraulic cylinder 1 from outside the hydraulic cylinder 1 and abuts against the piston 3. The other end of the piston rod 4 is provided with a top plate 5. The hydraulic cylinder 1 is connected to an oil groove 7 by an oil pipe 6.

Although the structure of this buffer cylinder can provide the basic buffer function, because the piston rod is only placed on the piston, the piston rod 4 and the piston 3 are not locked and fixed with each other. The structure of the piston 3 can only rely on its outer periphery to abut the inner wall of the oil chamber 2 to maintain its stability, and the piston rod 4 from top to bottom only depends on the position that passes through the hydraulic cylinder 1. It is supported by a perforation 8 and is structurally unstable. As a result, during the movement of the piston and the piston rod, the linkage between the piston and the piston rod will not be tight, which will cause the piston to deviate when moving, which will easily cause the inner wall of the oil chamber to wear. The oil seal is not tight and so on.

The main purpose of this creation is to provide a cushioning hydraulic cylinder structure in which the piston and the piston rod are integrated and can move synchronously at the same time. In order to achieve the above-mentioned main purpose, the cushioning hydraulic cylinder structure of the present creation includes a hydraulic cylinder body with an oil chamber inside, one side of the hydraulic cylinder body is provided with an oil inlet and outlet, and the hydraulic cylinder body is provided with a through hole above the hydraulic cylinder body. A piston body includes a rod part and a piston part integrally formed, the rod part is arranged on one side of the piston part, and the piston part is arranged in the oil chamber to divide the oil chamber into upper and lower spaces. A top plate is arranged at one end of the rod.

In the cushioning hydraulic cylinder structure created by the above-mentioned structure, when the piston body is moving, the piston part and the rod part can be moved together due to the connection between the piston part and the rod part.

Preferably, the piston part is further provided with a through hole, which penetrates the piston part and communicates with the upper and lower spaces of the oil chamber.

Preferably, the inner peripheral wall of the perforation is provided with an oil seal sleeve and a dust cover.

Preferably, the piston body extends upward through the perforation of the hydraulic cylinder with its rod portion to pass through the hydraulic cylinder and can be tightly sealed with the oil seal sleeve in the perforation.

The applicant first explains here that throughout the specification, including the embodiments described below and the claims in the scope of the patent application, the nouns related to directionality are based on the directions in the drawings. Secondly, in the following embodiments and drawings, the same element numbers represent the same or similar elements or their structural features.

Please refer to Figures 1 to 6, the structure of the buffer hydraulic cylinder of this creation includes:

An oil hydraulic cylinder 10 is provided with an oil chamber 11 therein. The oil hydraulic cylinder 10 has an oil inlet and outlet 12, and an oil pipe 13 can connect the oil chamber 11 with an external oil storage tank. A through hole 14 is provided above the hydraulic cylinder 10, and an oil seal sleeve 141 and a dust cover 142 are provided on the inner peripheral wall of the through hole 14. The hydraulic cylinder 10 can be divided into an upper cover 101, a lower cover 102, and a pipe body 103 located between the upper cover 101 and the lower cover 102, and the oil chamber 11 is located on the pipe body 103. The upper cover 101 and the lower cover 102 are respectively provided with a plurality of through holes 104. A plurality of bolts 15 respectively pass through the through holes 104 and pass through the lower cover 102 to the upper cover 101 so that the upper cover 101 and the lower cover 102 can be locked and fixed.

A piston body 20 includes a rod part 21 and a piston part 22. The rod part 21 is elongated and is arranged on one side of the piston part 22. The piston body 20 divides the oil chamber 11 into two upper and lower spaces with its piston portion 22 arranged in the oil chamber 11 of the hydraulic cylinder, and the piston body 20 extends upward through the hydraulic cylinder with its rod 21 The perforation 14 penetrates the hydraulic cylinder 10 and can be tightly fitted with the oil seal sleeve 141 in the perforation 14. At least one oil seal 23 is provided between the outer periphery of the piston portion 22 and the inner wall of the oil chamber 11. The piston portion 22 is further provided with a through hole 24, which penetrates the piston portion 22 and communicates with the upper and lower spaces of the oil chamber 11.

A top plate 30 is fixed at one end of the rod 21.

When using the structure of this creation, the installation and use methods are the same as the general buffer cylinder, and the same is set under the punch. The detailed content will not be explained here. However, because the piston part 22 and the rod part 21 of the piston body 20 in this creation are integrated, it is best to be integrally formed. Unlike the previous products, only the piston rod is placed on the piston, so the piston body 20 is On the whole, it can support multiple parts of the outer ring of the piston part 22 at the perforation 14 above the hydraulic cylinder, so when the piston body 20 is moving, the parts will not move separately. The problem of unstable or separate movement or non-parallel movement of the piston portion 22.

Furthermore, because the through hole 24 provided in the piston part 22 communicates with the upper and lower spaces of the oil chamber 11, when the piston body 20 is moving downward and the piston part 22 is pressed downward, the second space 16 in the oil chamber 11 In addition to the internal oil being squeezed back by the piston part 22 to the outer oil reservoir, a part of the oil can enter the first space 17 of the oil chamber 11 upwards, so that the piston body 20 can be properly lubricated and can also be reduced. The vacuum state of the first space 17 makes the movement of the piston body 20 faster and smoother.

1: Hydraulic cylinder block 2: oil chamber 3: Piston 4: Piston rod 5: Top plate 6: Tubing 7: oil tank 8: Piercing 10: Hydraulic cylinder block 101: upper cover 102: lower cover 103: tube body 104: Through hole 11: oil chamber 12: oil inlet and outlet 13: Tubing 14: Piercing 141: oil seal sleeve 142: Dust cover 15: Bolt 16: second space 17: The first space 20: Piston body 21: Rod 22: Piston 23: Oil seal sleeve 24: Through hole 30: top plate

Figure 1 is a schematic diagram of the products used in the past. Figure 2 is a three-dimensional exploded view of the creation. Figure 3 is a cross-sectional view of the creation. Figure 4 is a cross-sectional view of the creation, showing the state of movement of the piston body.

10: Hydraulic cylinder block

101: upper cover

102: lower cover

103: tube body

104: Through hole

11: oil chamber

14: Piercing

15: Bolt

20: Piston body

21: Rod

22: Piston

24: Through hole

30: top plate

Claims (4)

A buffer hydraulic cylinder structure, including: A hydraulic cylinder with an oil chamber inside, the hydraulic cylinder has an oil inlet and outlet, and a perforation is provided above the hydraulic cylinder; A piston body includes a rod part and a piston part integrally formed. The rod part is elongated and arranged on one side of the piston part. The piston body has its piston part arranged in the oil chamber of the hydraulic cylinder. The oil chamber is divided into two upper and lower spaces. The piston body extends upward through the perforation of the hydraulic cylinder to pass through the hydraulic cylinder. The piston part is additionally provided with a through hole that penetrates the piston part to communicate with each other. The upper and lower spaces of the oil chamber; A top plate is fixed on one end of the rod. The buffer hydraulic cylinder structure according to claim 1, wherein the hydraulic cylinder body can be divided into an upper cover, a lower cover, and a pipe body located between the upper cover and the lower cover, the oil chamber is located in the pipe body, the upper cover and The lower cover is respectively provided with a plurality of through holes, and a plurality of bolts are respectively penetrated through the through holes and penetrated from the lower cover to the upper cover so that the upper cover and the lower cover can be locked and fixed. According to claim 2, the buffer hydraulic cylinder structure, wherein an oil seal sleeve is provided between the outer periphery of the piston part and the inner wall of the oil chamber. According to claim 3, the buffer hydraulic cylinder structure, wherein the inner peripheral wall of the perforation is provided with an oil seal sleeve and a dust cover.

Images