Three-layer air cylinder, air cushion and press machine

Abstract

The utility model discloses a three-layer air cylinder which comprises a cylinder sleeve, a partition plate, an upper cover plate, a lower cover plate, a lower piston, a middle piston, an upper piston, an ejector rod, a limiting assembly, a positioning piece and a first elastic piece, the partition plate is arranged in the cylinder sleeve and divides the inner space of the cylinder sleeve into an upper cavity, a middle cavity and a lower cavity, and the lower piston and the lower cover plate form a lower air inlet cavity. The middle piston and the partition plate form a middle air inlet cavity, the upper piston and the partition plate form an upper air inlet cavity, air inlet holes communicated with the lower air inlet cavity, the middle air inlet cavity and the upper air inlet cavity are formed in the lower end of the ejector rod, the lower piston, the middle piston and the upper piston are positioned on the ejector rod through the limiting assembly, and at least one of the upper air inlet cavity, the middle air inlet cavity and the upper air inlet cavity is provided with a first elastic piece; the utility model further discloses the air cushion and the press machine. The air cylinder is arranged to be of a three-layer structure, and the size of the air cylinder is increased in the height direction, so that the situation that the size of the air cylinder is increased in the diameter direction is avoided, and the problem that adjacent air cylinders in adjacent air cushions possibly interfere with each other is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of presses, in particular to a three-layer cylinder, an air cushion and a press. Background Art

[0002] A press is a mechanical device that deforms a workpiece through pressure. The main body of the press includes a base, a column, and a crossbeam. Multiple sets of air cushions are arranged along the length direction of the base. The air cushions are used to stretch, press edges, and push materials.

[0003] The cylinder in the air cushion is the main working component. The cylinder is a device that can control the gas to undergo thermodynamic processes such as compression and expansion. The cylinder diameter determines the volume of the cylinder. The larger the diameter, the larger the volume of the cylinder. Therefore, the more gas is needed, the more compressed gas is, and the greater the pressure of the target gas will be. However, when the cylinder diameter is too large, the arrangement of the cylinders between multiple groups of air cushions will interfere with each other. Utility Model Content

[0004] The embodiment of the present application provides a three-layer cylinder to solve the problem that the air cushion using a single-layer cylinder will affect each other. The embodiment of the present application also provides an air cushion and a press using a three-layer cylinder.

[0005] The first aspect of the present application provides a three-layer cylinder, comprising:

[0006] Cylinder liner;

[0007] A partition plate is arranged in the cylinder sleeve and divides the space inside the cylinder sleeve into an upper cavity, a middle cavity and a lower cavity;

[0008] An upper cover plate, located at the top of the cylinder sleeve, and the upper cover plate is used to connect with the base of the press;

[0009] A lower cover plate, located at the bottom end of the cylinder sleeve;

[0010] A lower piston is slidably disposed in the lower cavity and forms a lower air inlet cavity with the lower cover plate;

[0011] A middle piston, slidably disposed in the middle cavity and forming a middle air inlet cavity with the adjacent partition below;

[0012] An upper piston is slidably disposed in the upper cavity and forms an upper air inlet cavity with the adjacent partition below;

[0013] A push rod, passing through the lower piston, the middle piston and the upper piston and then extending to the upper side of the upper cover plate, wherein the lower end of the push rod is provided with an air inlet hole connected with the lower air inlet cavity, the middle air inlet cavity and the upper air inlet cavity;

[0014] A limiting assembly, for positioning the lower piston, the middle piston and the upper piston on the push rod;

[0015] A positioning member, connected to the lower piston and used for contacting and limiting the position of the partition;

[0016] A first elastic member, wherein at least one of the upper air intake cavity, the middle air intake cavity or the upper air intake cavity is provided with the first elastic member.

[0017] The beneficial effect of the above embodiment is that by setting the cylinder into a three-layer structure, the cylinder volume is increased in the height direction, thereby avoiding increasing the cylinder volume in the diameter direction, and solving the problem of possible mutual interference between adjacent cylinders in adjacent air cushions.

[0018] Based on the above embodiments, the embodiments of the present application may also be improved as follows:

[0019] In one embodiment of the present application: the ejector includes:

[0020] A first rod body, on which the lower piston, the middle piston and the upper piston are installed;

[0021] The second rod body is threadedly connected to the upper end of the first rod body. The beneficial effect of this step is that the mandrel is divided into two assembleable parts, which is convenient for processing, transporting and assembling the mandrel.

[0022] In one embodiment of the present application: the limit assembly includes a plurality of limit members, the limit members are threadedly connected to the first rod body, and lock the corresponding lower piston, middle piston, and upper piston to the corresponding shaft shoulders of the first rod body. The beneficial effect of this step: the limit members connected by threads facilitate the installation of the lower piston, middle piston, and upper piston.

[0023] In one embodiment of the present application: the upper piston is provided with a positioning boss, the upper cover is provided with a positioning groove, one end of the first elastic member is sleeved on the positioning boss, and the other end is inserted into the positioning groove. The beneficial effect of this step: the first elastic member can be stably limited in the upper cavity.

[0024] In one embodiment of the present application, it further comprises: a guide sleeve connected to the upper cover plate, and the push rod slides through the guide sleeve. The beneficial effect of this step: the guide sleeve is smaller in size than the upper cover plate, is easy to process, and is also easy to replace after being damaged.

[0025] The second aspect of the present application provides an air cushion using the three-layer air cylinder, comprising:

[0026] A guide rail connected to the base;

[0027] A slider, slidably disposed on the guide rail;

[0028] Locking piece, connecting the upper cover plate and the slider to the guide rail

[0029] The beneficial effect of the above embodiment is that by cooperating with the guide rail slider and the locking piece, the three-layer cylinder forms a displaceable structure in the base, which is convenient for adjusting the processing position according to the workpieces of different structural shapes. Compared with the air cushion structure fixed by bolts, it does not require complicated disassembly and installation process. The cylinder can slide along the guide rail to adjust the position only after the locking piece is loosened, thereby having the advantage of convenient position adjustment.

[0030] In one embodiment of the present application: the locking member is a hydraulic locking structure. Beneficial effect of this step: the hydraulic locking enables the upper cover plate and the slider to clamp the guide rail on both sides of the guide rail, thereby stably positioning the three-layer cylinder.

[0031] The third aspect of the present application provides a press including the air cushion. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0033] Figure 1 It is a schematic diagram of the structure of a three-layer cylinder;

[0034] Figure 2 is a first structural schematic diagram of an air cushion;

[0035] Figure 3 is a second structural schematic diagram of the air cushion;

[0036] Figure 4 A schematic diagram of the structure in which an air cushion is installed in a base.

[0037] Among them, 1 cylinder liner, 2 partition plate, 3 upper cover plate, 4 lower cover plate, 5 lower piston, 6 middle piston, 7 upper piston, 8 push rod, 9 limit assembly, 10 positioning piece, 11 first elastic piece, 12 upper cavity, 13 middle cavity, 14 lower cavity, 15 first groove, 16 second groove, 17 guide sleeve, 18 guide rail, 19 slider, 20 locking piece. DETAILED DESCRIPTION

[0038] In this application, unless otherwise clearly specified and limited, the terms in this application should be understood in a broad sense, such as connection can be fixed connection, detachable connection or integration, direct connection or indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of different terms in this utility model can be understood according to specific circumstances, and the scope of the specific meaning should be limited to realizing the functions of this application.

[0039] Embodiment 1

[0040] like Figure 1 As shown, a three-layer cylinder includes: a cylinder sleeve 1, a partition plate 2, an upper cover plate 3, a lower cover plate 4, a lower piston 5, a middle piston 6, an upper piston 7, a push rod 8, a limit assembly 9, a positioning member 10, and a first elastic member 11. The partition plate 2 is arranged in the cylinder sleeve 1, and divides the space in the cylinder sleeve 1 into an upper cavity 12, a middle cavity 13, and a lower cavity 14. The upper cover plate 3 is located at the top of the cylinder sleeve 1, and the upper cover plate 3 is used to connect with the base of the press. The lower cover plate 4 is located at the bottom of the cylinder sleeve 1. The lower piston 5 is slidably arranged in the lower cavity 14 and forms a lower air intake cavity between the lower cover plate 4. The middle piston 6 is slidably arranged in the middle cavity 1 3 and form a middle air inlet cavity with the adjacent partition 2 below, the upper piston 7 is slidably arranged in the upper cavity 12 and forms an upper air inlet cavity with the adjacent partition 2 below, the push rod 8 passes through the lower piston 5, the middle piston 6, and the upper piston 7 and then extends to the top of the upper cover plate 3, and the lower end of the push rod 8 is provided with an air inlet hole connected with the lower air inlet cavity, the middle air inlet cavity, and the upper air inlet cavity. The limiting assembly 9 positions the lower piston 5, the middle piston 6, and the upper piston 7 on the push rod 8, the positioning member 10 is connected to the lower piston 5, and is used for contacting and limiting with the partition 2, and at least one of the upper air inlet cavity, the middle air inlet cavity or the upper air inlet cavity is provided with a first elastic member 11.

[0041] Specifically, Figure 1 As shown, the upper cover plate 3 and the lower cover plate 4 are locked by means of screws, and the screws pass through the upper cover plate 3 and the lower cover plate 4 and are connected with nuts.

[0042] Specifically, Figure 1 As shown, the push rod 8 includes: a first rod body and a second rod body. The first rod body is installed with a lower piston 5, a middle piston 6, and an upper piston 7. The second rod body is threadedly connected to the upper end of the first rod body, dividing the push rod 8 into two assembleable parts, which is convenient for processing, transportation, and assembly of the push rod 8.

[0043] Specifically, Figure 1As shown, the cylinder sleeve 1 includes three independent cylinder bodies arranged in sequence from top to bottom, a partition 2 is arranged between adjacent cylinder bodies, and both ends of the partition 2 are respectively plugged and connected with the corresponding cylinder bodies. A sealing ring is provided on the outer periphery of the partition 2 through a sealing ring groove, and the sealing between the partition 2 and the cylinder body is achieved through the sealing ring. A sealing ring is inserted into the inner ring of the partition 2 through a sealing ring groove and is sleeved on the outer side of the first rod body, and the sealing between the partition 2 and the first rod body is achieved through the sealing ring. The lower piston 5, the middle piston 6, and the upper piston 7 are sleeved with guide rings on their outer peripheries, and are slidably inserted into the cylinder body through the guide rings.

[0044] Specifically, Figure 1 As shown, the limit assembly 9 includes a plurality of limit members, which are threadedly connected to the first rod body and lock the corresponding lower piston 5, middle piston 6, and upper piston 7 to the corresponding axial shoulders of the first rod body. The threaded limit members facilitate the installation of the lower piston 5, middle piston 6, and upper piston 7.

[0045] Specifically, Figure 1 As shown, the limiter is a threaded member with a threaded hole in the middle, and the lower cover body is provided with a first groove 15 corresponding to the lower end of the first rod body. The lower end of the first rod body is inserted into the first groove 15 and is threadedly connected to a limiter. The lower cover body is also provided with an air inlet connected to the first groove 15, and the air inlet is connected to the air circuit system through a pipeline, and the air circuit system supplies high-pressure gas to the three-layer cylinders. The three cylinder bodies are also respectively provided with air ports, which are connected to the air circuit system through pipes. The air ports are used to discharge or inhale the gas in the area above the corresponding pistons during the movement of the lower piston 5, the middle piston 6, and the upper piston 7.

[0046] Specifically, Figure 1 As shown, the positioning member 10 is installed in the groove body opened at the upper end of the lower piston 5, and the adjacent partition 2 above the positioning member 10 is opened with a second groove 16 corresponding to the positioning member 10. The positioning member 10 is in contact with the bottom of the second groove 16 to determine the movement position of the push rod 8.

[0047] Specifically, Figure 1 As shown, the upper piston 7 is provided with a positioning boss, the upper cover plate 3 is provided with a positioning groove, the first elastic member 11 adopts a cylindrical compression spring, one end of the first elastic member 11 is sleeved on the positioning boss, and the other end is inserted into the positioning groove, and the first elastic member 11 can be stably limited in the upper cavity 12 through the cooperation of the positioning boss and the positioning groove.

[0048] Specifically, Figure 1 As shown, the three-layer cylinder also includes: a guide sleeve 17, the guide sleeve 17 is connected to the upper cover plate 3, the push rod 8 slides through the guide sleeve 17, and the guide sleeve 17 is small in size relative to the upper cover plate 3, which is easy to process and replace after damage.

[0049] By setting the cylinder into a three-layer structure, the cylinder volume is increased in the height direction, thereby avoiding increasing the cylinder volume in the diameter direction, and solving the problem of mutual interference between adjacent cylinder positions in adjacent air cushions.

[0050] Embodiment 2

[0051] like Figure 2-4 As shown, an air cushion using the three-layer cylinder disclosed in Example 1 includes: a guide rail 18, a slider 19, and a locking piece 20. The guide rail 18 is connected to the same base plate, the base plate is connected to the base, the slider 19 is slidably set on the guide rail 18, the locking piece 20 connects the upper cover plate 3 and the slider 19 to the guide rail 18, and the upper end of the push rod 8 is connected to the top crown. The guide rail 18, the slider 19 cooperates with the locking piece 20, so that the three-layer cylinder forms a displaceable structure in the base, which is convenient for adjusting the position of the cylinder and the top crown according to workpieces of different structural shapes. Compared with the air cushion structure fixed and installed by bolts, it does not require complicated disassembly and installation processes. Only after the locking piece 20 is loosened, the cylinder can slide along the guide rail 18 to adjust the position, thereby having the advantage of convenient position adjustment.

[0052] Specifically, Figure 2 As shown, the locking member 20 is a hydraulic locking structure, and the hydraulic locking enables the upper cover plate 3 and the slider 19 to clamp the guide rail 18 on both sides of the guide rail 18, thereby stably positioning the three-layer cylinder.

[0053] Specifically, Figure 2 As shown, the guide rail 18 is provided with a T-shaped guide groove, the slider 19 is an inverted T-shaped structure and is inserted into the guide groove with clearance and sliding. Through the T-shaped guide structure, the three-layer cylinder can be guided to move along the direction of the guide groove.

[0054] Specifically, Figure 2 As shown, the locking member 20 includes: a cylinder sleeve 1, a locking rod, and a second elastic member. The upper end of the locking rod is connected to the slider 19, and the lower end of the locking rod is slidably set in the cylinder sleeve 1 and divides the cylinder sleeve 1 into a first cavity and a second cavity. The first cavity is located above the second cavity, and the first cavity is used to pass hydraulic oil. The second elastic member is located in the second cavity. The second elastic member applies an upward elastic force to the locking rod, and the position of the locking rod is controlled by the hydraulic oil, thereby realizing the function of the slider 19 and the upper cover plate 3 clamping the guide rail 18 or loosening the guide rail 18. This structure can easily realize the function of switching the air cushion between the positioning state and the displaceable state.

[0055] Specifically, a piston is arranged at the lower end of the locking rod, and the piston is slidably inserted in the cylinder sleeve 1, and the upper end of the locking rod is threadedly connected to the slider 19. The second elastic member adopts a compression spring, and the cylinder sleeve 1 and the piston corresponding to the compression spring are both provided with a positioning groove. The hydraulic system controls the hydraulic oil to enter the first cavity, and cooperates with the second elastic member to realize the function of the locking rod moving up and down. When the first cavity enters the oil, the piston moves downward under pressure and compresses the spring, and the locking rod drives the slider 19 to move downward, so that the slider 19 and the upper cover plate 3 clamp the guide rail 18 on both sides of the guide rail 18, thereby locking the upper cover plate 3 and the slider 19 to the guide rail 18. When the hydraulic system controls the hydraulic oil to be discharged from the first cavity, the spring applies an upward reset force to the piston, and the clamping force jointly generated by the slider 19 and the upper cover plate 3 disappears, and the upper cover plate 3 and the slider 19 are in a displaceable state.

[0056] Embodiment 3

[0057] A press machine comprises the air cushion disclosed in the second embodiment.

[0058] The above are only embodiments of the utility model. The common sense such as the known specific structures and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field are aware of all the common technical knowledge in the technical field to which the utility model belongs before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement the scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for the ordinary technicians in the relevant field to implement this application. It should be pointed out that for the technicians in this field, without departing from the structure of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent.

Claims

1. A three-layer cylinder, characterized in that: include: Cylinder liner; A partition plate is arranged in the cylinder sleeve and divides the space inside the cylinder sleeve into an upper cavity, a middle cavity and a lower cavity; An upper cover plate, located at the top of the cylinder sleeve, and the upper cover plate is used to connect with the base of the press; A lower cover plate, located at the bottom end of the cylinder sleeve; A lower piston is slidably disposed in the lower cavity and forms a lower air inlet cavity with the lower cover plate; A middle piston, slidably disposed in the middle cavity and forming a middle air inlet cavity with the adjacent partition below; An upper piston is slidably disposed in the upper cavity and forms an upper air inlet cavity with the adjacent partition below; A push rod, passing through the lower piston, the middle piston and the upper piston and then extending to the upper side of the upper cover plate, wherein the lower end of the push rod is provided with an air inlet hole connected with the lower air inlet cavity, the middle air inlet cavity and the upper air inlet cavity; A limiting assembly, for positioning the lower piston, the middle piston and the upper piston on the push rod; A positioning member, connected to the lower piston and used for contacting and limiting the position of the partition; A first elastic member, wherein at least one of the upper air intake cavity, the middle air intake cavity or the upper air intake cavity is provided with the first elastic member.

2. The three-layer cylinder according to claim 1, characterized in that: The top rod comprises: A first rod body, on which the lower piston, the middle piston and the upper piston are installed; The second rod body is threadedly connected to the upper end of the first rod body.

3. The three-layer cylinder according to claim 2, characterized in that: The limiting assembly includes a plurality of limiting members, which are threadedly connected to the first rod body and lock the corresponding lower piston, middle piston and upper piston to the corresponding shaft shoulders of the first rod body.

4. The three-layer cylinder according to claim 1, characterized in that: The upper piston is provided with a positioning boss, the upper cover plate is provided with a positioning groove, one end of the first elastic member is sleeved on the positioning boss, and the other end is inserted into the positioning groove.

5. The three-layer cylinder according to claim 1, characterized in that: Also includes: A guide sleeve is connected to the upper cover plate, and the ejector rod slides through the guide sleeve.

6. An air cushion using the three-layer air cylinder according to any one of claims 1 to 5, characterized in that: include: A guide rail connected to the base; A slider, slidably disposed on the guide rail; The locking member connects the upper cover plate and the sliding block to the guide rail.

7. The air cushion according to claim 6, characterized in that The locking member is a hydraulic locking structure.

8. A press machine, characterized in that: Comprising the air cushion according to any one of claims 6 or 7.

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