Air cylinder assembly tool

Abstract

The utility model discloses an air cylinder assembling tool, and relates to the technical field of air cylinder assembling, an air cylinder comprises a rear support, a rear end cover, an air cylinder assembly, a front end cover and a front support which are connected in sequence, the front end cover and the rear end cover are connected through four parallel screws, any screw is in threaded connection with a hexagon nut, and the rear support and the front support are both of a bent structure; the assembling tool comprises a vertical leaning rod, a base and a top plate, the base and the top plate are parallel to each other and arranged on the same side of the vertical leaning rod, and the top plate can slide back and forth in the extending direction of the vertical leaning rod. The base is provided with a rotation stopping groove for installing the four screws. A first fixing mechanism is arranged on the base; a second fixing mechanism is arranged on the top plate. The structure meets the current cylinder assembly requirement, and a reference basis is provided for the assembly design of other cylinders; all parts of the air cylinder can be assembled step by step from bottom to top through the tool, the hierarchy is clear, the assembling logicality is high, the process is in a controlled state, and the consistency of air cylinder products is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of cylinder assembly, and more specifically, to a cylinder assembly tooling fixture. Background Art

[0002] The company is mainly engaged in the design and development, overhaul, major overhaul and finished product production of pantograph series products in the field of rail transit.

[0003] The power air source of the pantograph product is indispensable. The cylinder is a crucial component for ensuring the air source power. The state of the cylinder directly affects the raising and lowering of the pantograph product and its subsequent sustainable and stable operation. If the positional relationship between the cylinder fixing bracket and the cylinder is offset or inclined, resulting in a positional deviation when the cylinder is installed on the pantograph underframe, it will cause unilateral accelerated wear during use, and in the long run, it will cause wear of the sealing parts and air leakage, failing to meet the requirements of raising and lowering the pantograph, leaving potential safety hazards. Therefore, the maintenance and assembly process of the cylinder is very important.

[0004] During the maintenance and repair of the cylinder, it is necessary to replace various vulnerable parts. To ensure the assembly requirements of each part, it is necessary to assemble the parts with tooling fixtures to ensure the consistency of the cylinder products. The premise of this kind of assembly tooling fixture is to ensure the stability and consistent state of the assembled parts, and ensure the sustainable and stable tooling of the cylinder. Therefore, it is necessary to consider an assembly tooling fixture to assemble each part in sequence, ensure the correct assembly method of each part, ensure that the parts are not deformed or damaged, and ensure that the cylinder is assembled on the pantograph to maintain the best working state.

[0005] In the prior art, when assembling the cylinder, sometimes no tooling fixture is used, and a simple desktop assembly method is directly adopted. This assembly method has the following disadvantages:

[0006] 1. When assembling the front bracket and the rear bracket, there is no reference positioning, and it is impossible to guarantee the relative positional relationship between the bracket and the cylinder assembly, and between the brackets, leaving potential hazards for subsequent assembly and use on the pantograph.

[0007] 2. Since the cylinder is not placed vertically and not fixed, it is easy to shake when assembling the piston, and it is easy to damage the sealing ring on the piston.

[0008] 3. When tightening the fastening bolts between the rear end cover and the front end cover of the cylinder, it is very inconvenient. It is necessary to fix the hexagon head of the bolt with a wrench and then tighten the nut with a torque wrench to reach the torque requirement. It is easy to slip, which will cause burrs on the edge of the hexagon head of the bolt.

[0009] Therefore, a cylinder assembly tooling fixture is proposed. Summary of the Utility Model

[0010] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a cylinder assembly tooling fixture.

[0011] The object of the present utility model is achieved through the following technical solutions:

[0012] A cylinder assembly tooling, the cylinder includes a rear bracket, a rear end cover, a cylinder assembly, a front end cover and a front bracket connected in sequence. The front end cover and the rear end cover are connected by four mutually parallel screw rods. Any of the screw rods is threadedly connected with a hexagonal nut. Both the rear bracket and the front bracket are bending structures; the assembly tooling includes a vertical support rod and a base and a top plate that are mutually parallel. Both the base and the top plate are arranged on the same side of the vertical support rod, and the top plate can slide back and forth along the extending direction of the vertical support rod; the base is provided with anti-rotation grooves for installing the four screw rods; a first fixing mechanism is arranged on one side of the base away from the vertical support rod; a second fixing mechanism is arranged on one side of the top plate away from the vertical support rod.

[0013] Further, in the present utility model, the first fixing mechanism includes two first pressing plates detachably arranged on both sides of the base; a first inclined portion is arranged on one side of the base away from the vertical support rod, and the included angle between the first inclined portion and the top surface of the base is adapted to the bending angle of the rear bracket.

[0014] Further, in the present utility model, a chute is opened at one end of the vertical support rod away from the base, and the extending direction of the chute is the same as the extending direction of the vertical support rod; the top plate is slidably arranged in the chute.

[0015] Further, in the present utility model, the second fixing mechanism includes two second pressing plates detachably arranged on both sides of the top plate; a second inclined portion is arranged on one side of the top plate away from the vertical support rod, and the included angle between the second inclined portion and the top surface of the top plate is adapted to the bending angle of the front bracket.

[0016] Further, in the present utility model, a ball head positioning post is arranged on the top of the base.

[0017] Further, in the present utility model, a positioning pin penetrates through the top plate.

[0018] The beneficial effects of the present utility model are:

[0019] The present utility model provides a cylinder assembly tooling, whose structure meets the current cylinder assembly requirements, provides a reference basis for the assembly design of other cylinders; can use this tooling to gradually assemble the various components of the cylinder from bottom to top, with distinct levels, clear, strong assembly logic, and the process is in a controlled state, ensuring the consistency of cylinder products. Description of the Drawings

[0020] Figure 1 It is a structural schematic diagram of the cylinder of the embodiment of the present utility model;

[0021] Figure 2 The structural schematic diagram of the assembly tooling for the embodiment of the present utility model;

[0022] Figure 3 is Figure 2 front view of;

[0023] Figure 4 The schematic diagram of the assembly process for the embodiment of the present utility model;

[0024] Figure 5 The structural schematic diagram of the completed cylinder assembly for the embodiment of the present utility model.

[0025] In the figure: 101 - rear bracket; 102 - rear end cover; 103 - cylinder assembly; 104 - front end cover; 105 - front bracket; 106 - screw rod; 107 - hexagon nut; 201 - vertical rod; 202 - base; 203 - top plate; 204 - anti-rotation groove; 205 - first pressing plate; 206 - first inclined part; 207 - sliding groove; 208 - second pressing plate; 209 - second inclined part; 301 - ball head positioning post; 401 - positioning pin. Specific embodiments

[0026] Next, in combination with the embodiments, the technical solutions of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present utility model.

[0027] Please refer to Figures 1-5 , the present utility model provides a technical solution:

[0028] A cylinder assembly tooling, the cylinder includes a rear bracket 101, a rear end cover 102, a cylinder assembly 103, a front end cover 104 and a front bracket 105 connected in sequence. The front end cover 104 and the rear end cover 102 are connected by four mutually parallel screw rods 106. Any screw rod 106 is threadedly connected with a hexagon nut 107. Both the rear bracket 101 and the front bracket 105 are bent structures; the assembly tooling includes a vertical rod 201 and a base 202 and a top plate 203 that are parallel to each other. Both the base 202 and the top plate 203 are arranged on the same side of the vertical rod 201, and the top plate 203 can slide back and forth along the extending direction of the vertical rod 201; the base 202 is provided with an anti-rotation groove 204 for installing the four screw rods 106; a first fixing mechanism for fixing the rear bracket 101 during assembly is arranged on one side of the base 202 away from the vertical rod 201; a second fixing mechanism for fixing the front bracket 105 during assembly is arranged on one side of the top plate 203 away from the vertical rod 201.

[0029] AsFigure 1 As shown, the anti-rotation grooves 204 are two parallel long groove structures located on the upper surface of the base 202. The two anti-rotation grooves 204 extend along the Y-axis direction, and the width of the anti-rotation grooves 204 is the same as the distance between two opposite parallel faces among the six side faces of the hexagon nut 107. Thus, during assembly, first move the hexagon nut 107 on any screw 106 to one end of the screw 106, and then place the four hexagon nuts 107 in pairs in the two anti-rotation grooves 204. In this way, the four screws 106 can only move along the Y-axis direction in the horizontal direction.

[0030] As Figure 2 or Figure 3 shown, a stepped surface for placing the rear bracket 101 can be machined on the upper surface of the base 202. The height of the stepped surface is equal to the thickness of the rear bracket 101. After the rear bracket 101 is fixed to the base 202 by the first fixing mechanism, this stepped surface is used to place a part of the rear bracket 101. In addition, springs are installed under the first pressing plates 205 and the second pressing plates 208. After loosening the screws, the two first pressing plates 205 and the two second pressing plates 208 are separated from the rear bracket 101 and the front bracket 105 respectively, ensuring convenient removal after the cylinder is assembled.

[0031] The rear end cover 102 and the front end cover 104 of the cylinder are both cuboid structures, and four through holes adapted to the four screws 106 are respectively designed at the four corners of the two, facilitating the connection of the front end cover 104 and the rear end cover 102 by the four screws 106.

[0032] In this embodiment, the first fixing mechanism includes two first pressing plates 205 detachably arranged on both sides of the base 202; a first inclined portion 206 is provided on one side of the base 202 away from the vertical support rod 201, and the included angle between the first inclined portion 206 and the top surface of the base 202 is adapted to the bending angle of the rear bracket 101. The connection mode of the two first pressing plates 205 and the base 202 can adopt bolt connection, which is convenient for disassembly.

[0033] As Figure 4 shown, in order to facilitate the detachable connection between the top plate 203 and the vertical support rod 201, a sliding groove 207 is specifically opened at the top end of the vertical support rod 201, and the extending direction of the sliding groove 207 is the same as the extending direction of the vertical support rod 201; at the same time, a slider adapted to this sliding groove 207 can be installed on the side wall of the top plate 203 opposite to the second inclined portion 209. After the cylinder is assembled, as Figure 5 shown, place the top plate 203 on the top of the assembled cylinder and make the slider located in the sliding groove 207.

[0034] In this embodiment, the second fixing mechanism includes two second pressing plates 208 detachably arranged on both sides of the top plate 203; a second inclined portion 209 is arranged on one side of the top plate 203 away from the vertical leaning rod 201, and the angle between the second inclined portion 209 and the top surface of the top plate 203 is adapted to the bending angle of the front bracket 105. The connection method of the two second pressing plates 208 and the top plate 203 can also be bolted, which is convenient for disassembly.

[0035] In this embodiment, a ball head positioning column 301 is arranged on the top of the base 202. A countersunk hole is provided on the upper surface of the base 202, and a spring (not shown in the figure) and a pressure regulating nut (not shown in the figure) are installed in the hole to ensure that the ball head positioning column 301 automatically retracts and retracts. Under the action of the spring, the ball head positioning column 301 extends into the gas delivery threaded hole on the rear end cover 102 of the cylinder to play an accurate positioning role.

[0036] An exhaust threaded hole is designed on the front end cover 104 of the cylinder. In order to position the front end cover 104 of the cylinder by edge and point, ensure accurate positioning of the front end cover 104 of the cylinder, and ensure the correct position relationship of each part, a positioning pin 401 is specially provided on the top plate 203. During assembly, this positioning pin 401 extends into the exhaust threaded hole.

[0037] Assembly process:

[0038] Before assembly, the base 202 can be installed on the workstation table using bolts or other fasteners, and the cylinder can be assembled after the installation.

[0039] Step 1: Install four screw rods 106: Move the hexagonal nuts 107 on the four screw rods 106 to one end of the screw rods 106, and then place the four hexagonal nuts 107 in pairs in the two anti-rotation grooves 204;

[0040] Step 2: Install the rear bracket 101: Loosen the two first pressing plates 205, and then Figure 3 As shown, the rear bracket 101 is installed on the base 202, and the left and right first pressing plates 205 are pressed against the rear bracket 101 by tightening screws, ensuring that one side of the rear bracket 101 is in contact with the first inclined portion 206, and one side is in contact with the stepped surface on the upper surface of the base 202. At this time, the rear bracket 101 limits the position of the two screws 106 close to the first inclined portion 206, so that the two screws 106 cannot move on the base 202;

[0041] Step 3: Install the rear cover 102: Four screws 106 are respectively inserted into the four through holes on the rear cover 102, and then the rear cover 102 is placed on the base 202, and one side of the base 202 is in contact with the vertical support rod 201. At this time, the X-axis and Y-axis degrees of freedom of the rear cover 102 are both restricted, and it can only move in the Z-axis direction;

[0042] Step 4. Install the cylinder assembly 103: Place the cylinder assembly 103 on the rear end cover 102 and position the cylinder assembly 103 between the four screw rods 106;

[0043] Step 5. Install the front end cover 104: Pass the four screw rods 106 through the four through holes on the front end cover 104 respectively, then place the front end cover 104 on the cylinder assembly 103, and one end of the cylinder assembly 103 penetrates through the front end cover 104. And one side of the front end cover 104 abuts against the vertical support rod 201. At this time, both the X-axis degree of freedom and the Y-axis degree of freedom of the front end cover 104 are restricted, and it can only move in the Z-axis direction;

[0044] Step 6. Install the top plate 203: Then place the slider in the chute 207 until the bottom surface of the top plate 203 abuts against the upper surface of the front end cover 104;

[0045] Step 7. Install the front bracket 105: Loosen the two second pressing plates 208, and then as Figure 5 shown, install the front bracket 105 on the front end cover 104, and use fastening screws to press the left and right second pressing plates 208 against the front bracket 105 to ensure that one side of the front bracket 105 fits against the second inclined portion 209 and one side fits against the upper surface of the front end cover 104;

[0046] Step 8. Install accessories such as washers and nuts, and lock each nut as required: Looking from Figure 5 the perspective of, install the gasket and the lock nut on the top ends of the four screw rods 106 respectively, and lock them to make the assembled cylinder into a whole.

[0047] Step 9. Dismantle: Loosen the two first pressing plates 205 and the two second pressing plates 208, and then remove the assembled cylinder from this assembly fixture.

[0048] The above is only the preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed within the scope of the concept described herein through the above teachings or the technology or knowledge in related fields. And any changes and variations made by those skilled in the art without departing from the spirit and scope of the present invention shall fall within the protection scope of the appended claims of the present invention.

Claims

1. A cylinder assembly tool, the cylinder comprising a rear support (101), a rear cover (102), a cylinder assembly (103), a front cover (104) and a front support (105) connected in sequence, the front cover (104) and the rear cover (102) being connected by four mutually parallel screws (106), any of the screws (106) being threadedly connected with a hexagonal nut (107), the rear support (101) and the front support (105) both being bent structures; characterized in that: The assembly tool comprises a vertical leaning rod (201) and a base (202) and a top plate (203) which are parallel to each other. The base (202) and the top plate (203) are both arranged on the same side of the vertical leaning rod (201), and the top plate (203) can slide back and forth along the extension direction of the vertical leaning rod (201); a rotation-stop groove (204) for mounting four screw rods (106) is arranged on the base (202); a first fixing mechanism is arranged on a side of the base (202) away from the vertical leaning rod (201); and a second fixing mechanism is arranged on a side of the top plate (203) away from the vertical leaning rod (201).

2. The cylinder assembly tool according to claim 1, characterized in that: The first fixing mechanism comprises two first pressing plates (205) detachably arranged on both sides of the base (202); a first inclined portion (206) is arranged on a side of the base (202) away from the vertical leaning rod (201), and the angle between the first inclined portion (206) and the top surface of the base (202) is adapted to the bending angle of the rear bracket (101).

3. The cylinder assembly tool according to claim 1, characterized in that: A slide groove (207) is provided at one end of the vertical leaning rod (201) away from the base (202); the extension direction of the slide groove (207) is the same as the extension direction of the vertical leaning rod (201); and the top plate (203) is slidably disposed in the slide groove (207).

4. The cylinder assembly tool according to claim 3, characterized in that: The second fixing mechanism comprises two second pressing plates (208) detachably arranged on both sides of the top plate (203); a second inclined portion (209) is arranged on a side of the top plate (203) away from the vertical leaning rod (201), and the angle between the second inclined portion (209) and the top surface of the top plate (203) is adapted to the bending angle of the front bracket (105).

5. The cylinder assembly tool according to claim 1, characterized in that: A ball head positioning column (301) is provided on the top of the base (202).

6. The cylinder assembly tool according to claim 1, characterized in that: The top plate (203) is provided with a positioning pin (401).

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