Force-multiplying air cylinder structure

Abstract

The utility model discloses a double-force air cylinder structure which comprises a first cavity, a second cavity, an input push rod and an output push rod. The first cavity and the second cavity are communicated with each other. One end of the input push rod is located in the first cavity, and the first cavity is divided into a first chamber and a second chamber which are sealed and isolated; the other end of the input push rod slidably penetrates through the first cavity and extends into the second cavity; one end of the output push rod is located in the second cavity, and a gap is reserved between the output push rod and the input push rod; the other end of the output push rod slidably penetrates through the second cavity and divides the second cavity into a hydraulic oil filling chamber and a third chamber which are sealed and isolated; and sealing elements are arranged in a communicating area of the first cavity and the second cavity and a penetrating area of the second cavity and the output push rod. By means of the arrangement, the service life of the device can be prolonged while double-force transmission is achieved, and the operation reliability of the device is correspondingly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of air cylinder especially is concerned with a force multiplication cylinder structure. BACKGROUND

[0002] In the development history of industrial power transmission and force amplification technology, the traditional force multiplication mechanism has always occupied an important position, but with the continuous upgrading and diversified development of modern manufacturing industry, its limitations are increasingly prominent.

[0003] The traditional force multiplication mechanism usually includes a cylinder body, an input push rod and an output push rod. The input push rod and the output push rod are both slidingly installed in the cylinder body, and one end of the output push rod extends to the outside of the cylinder body. The cylinder body is divided into multiple chambers by the input push rod and the output push rod, so that when the outermost chamber and the chamber formed between the input push rod and the output push rod are injected with compressed gas, the input push rod can slide to be in close contact with the output push rod under the action of the compressed gas, and the output push rod is synchronously moved, realizing force multiplication output. Therefore, there is a phenomenon of hard collision between the input push rod and the output push rod during operation, which is easy to produce a large impact force. This not only accelerates the wear of the parts and reduces the service life of the equipment, but also may cause unstable force transmission, affecting the performance and reliability of the entire system.

[0004] Therefore, a force multiplication cylinder structure is needed to solve the above problems. SUMMARY

[0005] The utility model aims at providing a force multiplication cylinder structure to realize force multiplication transmission while prolonging the service life of the device and improving the reliability of the device operation.

[0006] To solve the above technical problems, the utility model provides a force multiplication cylinder structure, which comprises two first and second cavities in communication, an input push rod and an output push rod.

[0007] One end of the input push rod is located in the first cavity, and the first cavity is divided into a first chamber and a second chamber in sealed isolation.

[0008] The other end of the input push rod slidingly penetrates the first cavity and extends into the second cavity.

[0009] One end of the output push rod is located in the second cavity, and a gap is reserved between the input push rod and the output push rod.

[0010] The other end of the output push rod slidingly penetrates the second cavity and divides the second cavity into a hydraulic oil filling chamber and a third chamber in sealed isolation.

[0011] The communication area of the first cavity and the second cavity and the through area of the second cavity and the output push rod are provided with sealing members;

[0012] The first cavity is provided with an air inlet, the second cavity and the third cavity are provided with pressure ports, and the hydraulic oil filling chamber is filled with hydraulic oil liquid.

[0013] Further, the end of the input push rod abutting against the inner wall of the first cavity and the end of the output push rod abutting against the inner wall of the second cavity are provided with annular sealing rings.

[0014] Further, the end of the input push rod abutting against the inner wall of the first cavity and the end of the output push rod abutting against the inner wall of the second cavity are further provided with buffer rubber pads.

[0015] Further, the end of the input push rod extending through the second cavity is sleeved with a thin-wall spring type sealing sleeve on the outer wall of the end;

[0016] One end of the thin-wall spring type sealing sleeve is fixed at the communication area of the first cavity and the second cavity, and the other end is fixedly connected with the end of the input push rod.

[0017] Further, the end of the thin-wall spring type sealing sleeve is provided with a jacking block.

[0018] The jacking block is detachably connected with the end of the input push rod in the second cavity.

[0019] Further, the jacking block is integrally formed with the thin-wall spring type sealing sleeve.

[0020] Further, the connection between the jacking block and the input push rod is provided with an oil pressure sealing ring.

[0021] Further, the sealing member is a sealing ring.

[0022] Compared with the prior art, the utility model has at least the following beneficial effects:

[0023] By setting the first cavity, the second cavity, the input push rod and the output push rod, and by separating the first cavity and the second cavity into the first chamber, the second chamber, the hydraulic oil filling chamber and the third chamber through the input push rod and the output push rod respectively, and by forming a gap between the input push rod and the output push rod, when the input push rod is powered, the power transmission between the input push rod and the output push rod can be completed through the hydraulic oil, that is, they are always in a non-contact state, so as to avoid the problems of unstable force transmission and component wear caused by collision, so as to achieve force multiplication transmission while prolonging the service life of the device and improving the reliability of the device operation.

[0024] And according to the force multiplication principle formula, before the device is shipped, the ratio relationship between the two ends of the input push rod and the cross section of one end of the output push rod located in the second cavity can be adjusted according to the application requirements to correspondingly complete the output force adjustment, so as to better adapt to different working conditions and realize efficient and accurate production operation. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a structural schematic view of the force multiplication cylinder structure in an embodiment of the utility model;

[0026] Figure 2 It is a sectional view of the force multiplication cylinder structure in an embodiment of the utility model;

[0027] Figure 3 It is a structural schematic view of the thin-wall spring type sealing sleeve and the jacking block in the force multiplication cylinder structure in an embodiment of the utility model.

[0028] Drawing reference: 1, first cavity; 11, first chamber; 12, second chamber; 2, second cavity; 21, hydraulic oil filling chamber; 22, third chamber; 3, input push rod; 4, output push rod; 5, air inlet; 6, pressure port; 7, annular sealing ring; 8, buffer rubber pad; 9, thin-wall spring type sealing sleeve; 91, jacking block; 92, oil pressure sealing ring. DETAILED DESCRIPTION

[0029] The force multiplication cylinder structure of the utility model will be described in more detail below in conjunction with the schematic view, wherein the preferred embodiment of the utility model is shown, and it should be understood that the utility model described herein can be modified by those skilled in the art, and the advantageous effects of the utility model can still be achieved. Therefore, the following description should be understood as extensive knowledge for those skilled in the art, and not as a limitation on the utility model.

[0030] The utility model is described in more detail by way of example with reference to the drawings in the following paragraphs. The advantages and features of the utility model will be more apparent from the following description. It should be noted that the drawings are all in a very simplified form and all use non-precise proportions, merely for the purpose of facilitating and clarifying the purpose of assisting in the description of the embodiments of the utility model.

[0031] As shown in Figure 1 and Figure 2 embodiments of the utility model disclose a force-amplifying cylinder structure, which comprises two mutually communicating first cavity 1 and second cavity 2, input push rod 3 and output push rod 4.

[0032] Wherein, one end of the input push rod 3 is located in the first cavity 1, and the first cavity 1 is divided into a first chamber 11 and a second chamber 12 in a sealed and isolated manner.The first chamber 11 is used as the access point of the power source, and the second chamber 12 is used for balancing and buffering the pressure suffered by the input push rod 3.

[0033] The other end of the input push rod 3 is slidably penetrated through the first cavity 1 and extends into the second cavity 2, and is used for power transmission to realize the function of force amplification.Specifically, when a smaller air pressure acts on one end of the input push rod 3, and this force is transmitted to the second cavity 2, other components (such as the output push rod 4) in the second cavity 2 can be driven to work, realizing the function of output force amplification.

[0034] One end of the output push rod 4 is located in the second cavity 2, and the other end of the output push rod 4 is slidably penetrated through the second cavity 2, and is used as an execution element to complete force transmission.

[0035] It should be noted that a gap is reserved between the output push rod 4 and the input push rod 3 to ensure that the output push rod 4 and the input push rod 3 do not contact each other, so as to avoid wear caused by hard contact between the two, thereby affecting the service life of the overall device.

[0036] In addition, the output push rod 4 divides the second cavity 2 into a hydraulic oil filling chamber 21 and a third chamber 22 in a sealed and isolated manner, that is, hydraulic oil is injected into the gap formed between the output push rod 4 and the input push rod 3, so that the hydraulic oil can be used as an intermediate medium to complete force transmission when the input push rod 3 transmits force, compared with the hard contact mode between the input push rod 3 and the output push rod 4 in the prior art, the device can effectively prolong the service life of the device.

[0037] It should be particularly noted that the communication area between the first cavity 1 and the second cavity 2 and the penetration area between the second cavity 2 and the output push rod 4 are all provided with sealing members to ensure that each chamber is independent of each other.

[0038] The first chamber 11 is provided with an air inlet 5, the second chamber 12 and the third chamber 22 are provided with pressure ports 6 for balancing the gas, and the hydraulic oil filling chamber 21 is filled with hydraulic oil liquid.

[0039] The device is provided with a first cavity 1, a second cavity 2, an input push rod 3 and an output push rod 4, and the first cavity 1 and the second cavity 2 are separated into a first chamber 11, a second chamber 12, a hydraulic oil filling chamber 21 and a third chamber 22 by the input push rod 3 and the output push rod 4 respectively, and a gap is formed between the input push rod 3 and the output push rod 4, so that when the input push rod 3 is powered, the power transmission between the input push rod 3 and the output push rod 4 can be completed by hydraulic oil, that is, the two are always in a non-contact state, so that the problem of unstable force transmission and component wear caused by collision can be avoided, thereby achieving force amplification transmission while prolonging the service life of the device and improving the reliability of the device operation.

[0040] Furthermore, according to the force amplification principle formula, before the device is shipped, the ratio relationship between the two ends of the input push rod 3 and the cross section of one end of the output push rod 4 located in the second cavity 2 can be adjusted according to the application requirements to correspondingly complete the output force adjustment, so as to better adapt to different working conditions and realize efficient and accurate production operation.

[0041] Specifically, the force amplification principle formula is Where F is the output force of the output push rod 4, P is the pressure received by the input push rod 3, S1 is the effective cross-sectional area of one end of the input push rod 3, S2 is the effective cross-sectional area of the other end of the input push rod 3 (such as the effective cross-sectional area located in the second cavity 2), and S3 is the effective cross-sectional area of the output push rod 4 (the part connected to the load). This formula is based on Pascal's law, that is, the force generated by hydraulic or pneumatic pressure is proportional to the effective action area, so before the device is shipped, the effective cross-sectional area ratio of the input push rod 3 and the output push rod 4 can be adjusted to realize the adjustment of the force amplification multiple according to the requirements, so as to meet different application requirements.

[0042] In further embodiments, the input push rod 3 and the output push rod 4 are further limited to better separate the first cavity 1 into the first chamber 11 and the second chamber 12 and separate the second cavity 2 into the hydraulic oil filling chamber 21 and the third chamber 22. Specifically, an annular sealing ring 7 is arranged on the end of the input push rod 3 abutting the inner wall of the first cavity 1 and the end of the output push rod 4 abutting the inner wall of the second cavity 2.

[0043] Furthermore, the end of the input push rod 3 abutting the inner wall of the first cavity 1 and the end of the output push rod 4 abutting the inner wall of the second cavity 2 are also provided with a buffer rubber pad 8 to improve the stability of the device operation.

[0044] As Figure 2 And Figure 3 As shown in other embodiments, in order to better isolate the hydraulic oil filling chamber 21 and the second chamber 12, a thin-walled spring type sealing sleeve 9 is sleeved on the outer wall of the end of the input push rod 3 extending through the second cavity 2.

[0045] One end of the thin-walled spring type sealing sleeve 9 is fixed at the communication between the first cavity 1 and the second cavity 2, and the other end is fixedly connected with the end of the input push rod 3, that is, by arranging the thin-walled spring type sealing sleeve 9, the end of the input push rod 3 is wrapped, so as to ensure the isolation effect of the hydraulic oil filling chamber 21 and the second chamber 12 without affecting the sliding of the input push rod 3.

[0046] In addition, the end of the thin-walled spring type sealing sleeve 9 is provided with a jacking block 91, and the jacking block 91 is detachably connected with the input push rod 3 at one end of the second cavity 2. By changing the size of the end of the jacking block 91 (that is, the effective cross-sectional area S2 of the input push rod 3 in the above formula), the adjustment of the force amplification multiple can be realized.

[0047] In this embodiment, in order to ensure the sealing performance, the jacking block 91 and the thin-walled spring type sealing sleeve 9 are integrally formed.

[0048] It should be noted that the connection between the jacking block 91 and the input push rod 3 is provided with an oil pressure sealing ring 92, which further improves the sealing performance.

[0049] In this embodiment, the sealing member in the first cavity 1 and the second cavity 2 is a sealing ring.

[0050] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A force-multiplying cylinder structure, characterized in that, It includes two interconnected first and second cavities, an input push rod, and an output push rod; One end of the input push rod is located inside the first cavity, and the first cavity is divided into a sealed and isolated first chamber and a second chamber. The other end of the input push rod slides through the first cavity and extends into the second cavity; One end of the output push rod is located inside the second cavity, and a gap is reserved between it and the input push rod; The other end of the output push rod slides through the second cavity and divides the second cavity into a sealed and isolated hydraulic oil-filled chamber and a third chamber; The communication area between the first cavity and the second cavity, as well as the through area between the second cavity and the output push rod, are all provided with sealing elements; Furthermore, the first chamber is provided with an air inlet, the second chamber and the third chamber are both provided with pressure ports, and the hydraulic oil filling chamber is filled with hydraulic oil.

2. The force-multiplying cylinder structure as described in claim 1, characterized in that, An annular sealing ring is provided on the end of the input push rod that is in contact with the inner wall of the first cavity and the end of the output push rod that is in contact with the inner wall of the second cavity.

3. The multiplier cylinder structure as described in claim 1 or 2, characterized in that, The end of the input push rod that is in contact with the inner wall of the first cavity and the end of the output push rod that is in contact with the inner wall of the second cavity are also provided with buffer pads.

4. The force-multiplying cylinder structure as described in claim 1, characterized in that, A thin-walled spring-type sealing sleeve is fitted onto the outer wall of one end of the input push rod that extends through to the second cavity. One end of the thin-walled spring-type sealing sleeve is fixed to the connection between the first cavity and the second cavity, and the other end is fixedly connected to the end of the input push rod.

5. The force-multiplying cylinder structure as described in claim 4, characterized in that, A lifting block is provided at the end of the thin-walled spring-type sealing sleeve; The lifting block and the input push rod are detachably connected at one end of the second cavity.

6. The force-multiplying cylinder structure as described in claim 5, characterized in that, The lifting block and the thin-walled spring-type sealing sleeve are integrally formed.

7. The force-multiplying cylinder structure as described in claim 5, characterized in that, A hydraulic sealing ring is provided at the connection between the lifting block and the input push rod.

8. The force-multiplying cylinder structure as described in claim 1, characterized in that, The sealing element is a sealing ring.

Images