Device for enabling piston to enter cylinder

Abstract

The invention provides a device for inserting a piston into a cylinder, and belongs to the technical field of engine assembly. The invention aims to provide the piston-in-cylinder device which is convenient for personnel to operate, simple in structure, high in assembly precision, small in occupied area and capable of loading the piston into the air cylinder from the back surface. The piston cylinder entering device comprises a bottom frame and a top mounting mechanism, the top mounting mechanism comprises a bottom plate and a feeding base, the bottom plate is fixedly connected with a feeding sliding rail, the bottom of the feeding base is fixedly connected with a feeding sliding block and can slide front and back along the feeding sliding rail, the upper end of the feeding base is fixedly connected with a top strip, and the outer end of the top strip is fixedly connected with a top head; the feeding base is fixedly connected with a connecting strip which is vertically arranged, and the upper portion of the connecting strip is fixedly connected with a pull rod. And the feeding slide rail, the top strip and the pull rod are arranged in parallel. According to the scheme, the piston entering operation can be completed when an engine air cylinder opening is opposite to a worker, the worker can apply force conveniently, and the assembling precision is higher.

Description

Technical Field

[0001] The invention belongs to the technical field of engine assembly, and particularly relates to a piston-in-cylinder device. Background Art

[0002] As the automotive industry's demand for more engines grows, the requirements for production efficiency and production technology of engine production lines are becoming increasingly higher. The traditional method of manually installing pistons, piston rings, etc. into cylinders is inefficient and easily damages the cylinders, which obviously cannot meet the requirements for production efficiency and production technology.

[0003] The Chinese invention patent with the publication number "CN101829975A" discloses a tool for inserting a piston into a cylinder. The overall shape is cylindrical, and the inner hole is conical. When in use, the piston is installed in the conical cylinder and the small-diameter end of the conical cylinder is aligned with the cylinder. The operator uses a wooden stick to push the piston into the cylinder from the bottom. At this time, whether the operator pushes the piston from the front or the side, it is difficult to exert force, and the operation is inconvenient. If a small hammer is used to knock the piston from the side, it is difficult to ensure that the force of the small hammer is coaxial with the piston, which easily causes the piston to deviate and hit the conical cylinder and be damaged.

[0004] The Chinese invention patent with the publication number "CN104669199A" discloses a special tooling and method for installing a two-stroke engine piston into a cylinder body, including a support seat, a pair of limit rods, a piston horizontal support plate and two arc-shaped clamping plates. The support seat is L-shaped, including a vertical plate and a bottom plate that are vertically fixed and connected into one body. A pair of limit rods are horizontally fixed to the upper end of the vertical plate, and an elastic sleeve is sleeved on the limit rods. The piston horizontal support plate located on the lower side of the pair of limit rods is fixed to the vertical plate. When in use, the piston, connecting rod, and front and rear crankcases are installed into the support seat together, and then the operator picks up the cylinder body and presses down on the piston to install the piston into the cylinder. However, the cylinder is generally relatively heavy, and long-term manual installation is easy to make the operator tired, which reduces the installation efficiency and the installation accuracy. In addition, the cylinder is manually moved each time in this scheme, resulting in the cylinder placement position and angle cannot be unified, which is not conducive to automated assembly line processing, and further reduces the assembly efficiency of the engine.

[0005] In addition, during assembly line operation, the engine is usually fixed to the conveyor line by means of fixtures. Due to the arrangement of the working procedures, the engine cylinder bore is often required to face opposite sides of the piston installation process. In this case, a turntable needs to be added to the conveyor line, which increases the space and cost. Summary of the invention

[0006] In view of the deficiencies in the prior art, the object of the present invention is to provide a piston-in-cylinder device which is easy to operate, has a simple structure, high assembly precision, occupies little space, and can install a piston into a cylinder from the back.

[0007] The purpose of the present invention can be achieved by the following technical solutions:

[0008] A piston-in-cylinder device comprises a base frame and a top-loading mechanism, the top-loading mechanism comprises a bottom plate and a feed base, the bottom plate is fixedly connected to a feed slide rail, the bottom of the feed base is fixedly connected to a feed slider and can slide back and forth along the feed slide rail, the upper end of the feed base is fixedly connected to a top bar, and the outer end of the top bar is fixedly connected to a top head; a connecting bar is fixedly connected to the feed base, the connecting bar is vertically arranged, and a pull rod is fixedly connected to the upper part of the connecting bar; the feed slide rail, the top bar and the pull rod are arranged parallel to each other.

[0009] The piston-in-cylinder device and the worker's workstation of this solution are respectively located on both sides of the conveyor line. When the engine is transported to the workstation and stops, the engine cylinder port is facing away from the worker (towards the piston-in-cylinder device). The worker aligns the piston assembly with the cylinder port and holds the pull rod and pulls it toward himself. The piston assembly can be pushed into the cylinder by the push head. The operation is very simple, and it is more convenient for the worker to exert force when pulling than pushing from the front or side. The worker can complete other engine assembly processes when the engine cylinder surface is facing away from him, and install the piston assembly into the cylinder from the back without the need to set up an additional turntable to turn the engine, which saves costs and also leaves more space for the worker to operate at the worker's workstation. The slide rails, push bars and pull rods are parallel to each other to ensure that the direction of force is consistent with the direction of equipment travel, which is more labor-saving. During top installation, the push head and the piston assembly are coaxial, which is more accurate and avoids wear or strain on the cylinder body caused by the deviation of the piston assembly.

[0010] In the above-mentioned piston-in-cylinder device, a feed limit block and a fixed frame are also fixedly connected to the bottom plate, the feed limit block is close to the front end of the feed slide rail, and the fixed frame is close to the rear end of the feed slide rail; the fixed frame is fixedly provided with a limit rod, and a bumper is provided at one end of the limit rod facing the connecting strip, and a bumper block is provided at a position on the connecting strip corresponding to the bumper, and a connecting part is provided on the fixed frame and the connecting strip, and a tension spring is connected between the two connecting parts.

[0011] When the worker pulls the top loading mechanism, it drives the tension spring to be stretched. When it is pulled into place, the limit block at the front end of the feed slide rail conflicts with the feed base to limit it, preventing the worker from using too much force and causing damage to the engine and piston. When the worker lets go, the tension spring retracts and drives the top loading mechanism to retreat, preventing the top loading mechanism from interfering with other processes of engine production. Subsequently, the bumper and the bump block conflict with each other to limit its retraction, so that it stays in a position that is convenient for the worker to pull without interfering with production.

[0012] In the above piston-in-cylinder device, the top loading mechanism also includes an adjustment plate, the front and rear parts of the adjustment plate are fixedly connected with translation rails, the bottom surface of the bottom plate is fixedly connected with a translation slider adapted to the translation rails, and the bottom plate can translate left and right along the translation rails. The adjustment plate is arranged under the bottom plate, and the bottom plate is arranged to debug the horizontal position of the top loading mechanism. After the debugging is completed, it is fixed so that the top head and the piston assembly are coaxial, and the piston assembly is assembled more accurately.

[0013] Furthermore, two bearing assemblies are fixedly connected to the middle part of the adjustment plate, a translation screw is connected between the two bearing assemblies, a translation block is fixedly connected to the bottom surface of the base plate, an inwardly concave limiting groove is provided on the bottom surface of the translation block, a translation nut is fixedly connected in the limiting groove, the translation nut is adapted to the translation screw and the two are threadedly connected; the translation rail and the translation screw are arranged parallel to each other.

[0014] When rotating the translation screw to adjust the horizontal position of the top-mounted mechanism, because the upper end of the nut is fixed to the translation block, the translation nut does not rotate and will move on the screw with the thread, driving the base plate to translate left and right. The translation nut and the translation screw cooperate to adjust the horizontal position of the top-mounted mechanism, which is simple, labor-saving and more accurate. When the adjustment is completed, the translation nut is stuck in the limit groove, which can also play a positioning role for the upper base plate, avoiding left and right horizontal movement of the base plate when the top-mounted mechanism is pulled.

[0015] The above-mentioned piston-in-cylinder device also includes a lifting mechanism, which includes a lifting positioning plate, a guide column and a worm gear lifting assembly. The lifting positioning plate is fixedly connected to the base frame, a guide sleeve is fixedly connected to the lifting positioning plate, the guide column passes through the guide sleeve and the upper end of the guide column is fixedly connected to the top loading mechanism, and the worm gear lifting assembly is fixedly connected to the lower bottom surface of the lifting positioning plate and can drive the top loading mechanism to lift and lower.

[0016] The worm gear lifting assembly is compact and helps save space. The worm gear lifting assembly has a good self-locking function to prevent the top loading mechanism from falling due to gravity. Together with the guide column and guide sleeve, the lifting of the top loading mechanism is smoother and more accurate, thereby improving the accuracy of the piston entering the cylinder of the device and improving its universality when facing different production lines.

[0017] The above-mentioned piston-in-cylinder device also includes a piston sleeve and a conveyor line installed in front of the top loading mechanism. The conveyor line is provided with a tooling fixture for fixing the engine, and the top head faces the conveyor line; the top head is columnar and horizontally arranged, one end of the top head is fixedly connected to the push rod, and the other end faces the conveyor line. A sleeve limiting groove is provided on the top head, and the length of the sleeve limiting groove is greater than the length of the piston sleeve.

[0018] To facilitate piston assembly, use an inner-conical piston sleeve, install the piston assembly in the piston sleeve and clamp the piston sleeve at the cylinder mouth, pull the top-loading mechanism to install the piston. After assembly, the piston sleeve falls and is clamped in the sleeve limit groove of the top head. It will not fall out when the top-loading mechanism is retracted, thus preventing the sleeve from falling and being damaged.

[0019] Furthermore, the plug is made of nylon material, and the end of the plug facing the conveyor line is semicircular. The plug made of nylon material has moderate strength, and will not be easily deformed when subjected to force to cause force deviation, nor will it be too hard to cause damage to the piston.

[0020] In the above piston-in-cylinder device, a reinforcing frame is fixed on the connecting bar, and the reinforcing frame is in the shape of a right triangle, and the two right-angled sides of the reinforcing frame are respectively against the connecting bar and the feed base. The reinforcing frame and the pull rod are on the same side of the connecting bar to strengthen the strength of this side when pulling.

[0021] In the above-mentioned piston-in-cylinder device, one end of the translation screw is fixedly connected with a handwheel assembly, and turning the handwheel to complete the debugging is more labor-saving and convenient.

[0022] In the above piston-in-cylinder device, a handle is provided at the outer end of the pull rod to facilitate workers to hold it.

[0023] Compared with the prior art, the technical effects of the present invention are:

[0024] First, the piston-in-cylinder device can complete the piston-in-cylinder operation when the engine cylinder port is facing away from the worker, and other engine assembly processes can be completed at this time without the need to set up an additional turntable to turn the engine, which saves costs and also leaves more space for workers to operate at their workstations.

[0025] Secondly, the worker of the piston-in-cylinder device only needs to align the piston assembly with the cylinder mouth, hold the pull rod and pull it toward himself to push the piston assembly into the cylinder. The operation is very simple, and it is more convenient for the worker to apply force when pulling than pushing from the front or side. The direction of force is consistent with the direction of equipment movement, which saves more effort and improves production efficiency.

[0026] Third, the piston-in-cylinder device can adjust the height and horizontal position of the top-loading mechanism to adapt to different assembly lines, and has high universality. After debugging is completed, the top head and the piston assembly are coaxial during top loading, the equipment will not shift, the top loading is more precise, and the deflection of the piston assembly causing wear or strain on the cylinder body can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the piston-in-cylinder device of the present invention.

[0028] Figure 2 This is a schematic diagram of the top loading mechanism structure of the present invention.

[0029] Figure 3 The present invention Figure 2 Magnified view of area A.

[0030] Figure 4 It is a schematic diagram of the structure of the adjustment plate of the present invention.

[0031] Figure 5 It is a structural schematic diagram of the lifting mechanism of the present invention.

[0032] Figure 6 It is a top view of the whole machine of the present invention.

[0033] Figure 7 It is a schematic diagram of the structure of the piston sleeve and the top head of the present invention.

[0034] In the figure, 1 is a base frame, 2 is a top mounting mechanism, 21 is a bottom plate, 211 is a feed slide rail, 212 is a feed limit block, 213 is a fixed frame, 214 is a limit rod, 215 is a bumper, 216 is a connecting part, 217 is a tension spring, 218 is a translation slider, 219 is a translation block, 2191 is a limit groove, 22 is a feed base, 221 is a feed slider, 222 is a connecting strip, 223 is a bumper, 23 is a top strip, 231 is a top head, 2311 is a sleeve limit groove, 24 is a pull rod, 241 is a handle, 25 is an adjustment plate, 251 is a translation slide rail, 252 is a bearing assembly, 253 is a translation screw rod, 254 is a translation nut, 255 is a handwheel assembly, 3 is a conveyor line, and 31 is a fixture. DETAILED DESCRIPTION

[0035] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0036] like Figure 1 , Figure 2 , Figure 3 As shown, a piston-in-cylinder device comprises a base frame 1 and a top-loading mechanism 2 fixedly connected to the base frame 1, the top-loading mechanism 2 comprises a bottom plate 21 and a feeding base 22, a feeding slide rail 211 is fixedly connected to the bottom plate 21, a feeding slider 221 is fixedly connected to the bottom of the feeding base 22 and can slide forward and backward along the feeding slide rail 211, a feeding limit block 212 is arranged in front of the feeding slide rail 211, a fixing frame is arranged behind the feeding slide rail 211, a limiting rod 214 is fixedly arranged on the fixing frame 213, and the limiting rod 214 faces the connecting rod 211. A butt 215 is provided at one end of the connecting strip 222, and a butt block 223 is provided at a position on the connecting strip 222 corresponding to the butt 215. A connecting portion 216 is provided on the fixing frame 213 and the connecting strip 222, and a tension spring 217 is connected between the two connecting portions 216. A reinforcing frame 26 is also fixed to the connecting strip 222, and the reinforcing frame 26 is a right-angled triangle. The two right-angled sides of the reinforcing frame 26 respectively abut against the connecting strip 222 and the feed base 22 to increase the strength of the connecting strip 222.

[0037] Furthermore, a top bar 23 is fixedly connected to the upper end of the feed base 22, and a top head 231 is fixedly connected to the outside of the top bar 23; a connecting bar 222 is fixedly connected to the feed base 22, the connecting bar 22 is vertically arranged, a pull rod 24 is fixedly connected to the upper part of the connecting bar 222, and a handle 241 is provided at the outer end of the pull rod, and the feed slide rail 211, the top bar 23 and the pull rod 24 are arranged parallel to each other.

[0038] Furthermore, the top-mounting mechanism 2 also includes an adjustment plate 25, the front and rear parts of the adjustment plate 25 are fixedly connected with a translation rail 251, and the bottom surface of the bottom plate 21 is fixedly connected with a translation slider 218 adapted to the translation rail 251. The bottom plate 21 can translate left and right along the translation rail 251 to debug the horizontal position of the top-mounting mechanism 2. After the debugging is completed, it is fixed to make the top head 231 and the piston assembly coaxial, and the piston assembly is assembled more accurately.

[0039] Further, such as Figure 4 As shown, the middle part of the adjustment plate 25 is fixedly connected with two bearing assemblies 252, a translation screw 253 is connected between the two bearing assemblies 252, a handwheel assembly 255 is provided at one end of the translation screw 253, a translation block 219 is fixedly connected to the bottom surface of the bottom plate 21, a concave limiting groove 2191 is provided on the bottom surface of the translation block 219, a translation nut 254 is fixedly connected in the limiting groove 2191, the translation nut 254 is adapted to the translation screw 253 and the two are threadedly connected, the translation rail 251 and the translation screw 253 are arranged parallel to each other, and the translation screw 253 is rotated to debug the top When the loading mechanism 2 is in a horizontal position, because the upper end of the translation nut 254 is fixed to the translation block 219, the translation nut 254 does not rotate and will move on the translation screw 253 along with the thread, driving the bottom plate 21 to translate left and right. The translation nut 254 and the translation screw 253 cooperate to adjust the horizontal position of the top loading mechanism 2, which is simple, labor-saving and more accurate. When the adjustment is completed, the translation nut 253 is stuck in the limit groove 2191, which can also play a positioning role for the upper bottom plate 21, avoiding the bottom plate 21 from moving left and right when the top loading mechanism 2 is pulled.

[0040] Further, such as Figure 5 As shown, the lifting mechanism 5 includes a lifting positioning plate 51, a guide column 52 and a worm gear lifting assembly 53. The lifting positioning plate 51 is fixedly connected to the base frame 1. A guide sleeve 54 is fixedly connected to the lifting positioning plate 51. The guide sleeve 54 is in a "T" shape as a whole, including a gasket 541 and a hollow cylindrical sleeve body 542. The sleeve body 542 passes through the lifting positioning plate 51. The gasket 541 is stuck on the upper surface of the lifting positioning plate 51 and is fixedly connected to the lifting positioning plate 541. The guide column 52 passes through the guide sleeve 54 and the upper end of the guide column 52 is fixedly connected to the top mounting mechanism 2. The worm gear lifting assembly 53 includes a worm wheel, a worm and a lead screw. The worm wheel is fixedly connected to the lower bottom surface of the lifting positioning plate 51, the lead screw passes through the lifting positioning plate 541 and the upper end is fixedly connected to the top mounting mechanism 2. Furthermore, a locking mechanism and a parameter display device are also provided at the end of the worm. The locking mechanism locks the worm to further improve the stability of the lifting, and the parameter display device visualizes the lifting height.

[0041] Further, such as Figure 6 , Figure 7As shown, a conveyor line 3 and a piston sleeve 4 are provided in front of the top loading mechanism 2, and a tooling fixture 31 for fixing the engine is provided on the conveyor line 3; the top head 231 is columnar and horizontally arranged, one end of the top head 231 is fixedly connected to the top rod 23, and the other end faces the conveyor line 3, and a sleeve limiting groove 2311 is provided on the top head 231, and the length of the sleeve limiting groove 2311 is greater than the length of the piston sleeve 4. In order to facilitate the assembly of the piston, with the inner cone-shaped piston sleeve 4, the piston assembly is installed in the piston sleeve 4 and the piston sleeve 4 is clamped at the cylinder port, and the top loading mechanism 2 is pulled to install the piston. After the assembly is completed, the piston sleeve 4 falls and is clamped in the sleeve limiting groove 2311 of the top head 231, and will not fall out when the top loading mechanism 2 is retracted, so as to prevent the sleeve from falling and breaking.

[0042] As a preferred solution, the plug 231 is made of nylon material, and the end of the plug 231 facing the conveyor line 3 is semicircular. The plug made of nylon material has moderate strength, and will not be easily deformed when subjected to force, causing force deflection, nor will it be too hard to cause damage to the piston.

[0043] When in use, the engine is transported to the workstation via the conveyor line 3 and stops. At this time, the engine cylinder port is facing away from the worker (towards the piston cylinder device). The worker installs the piston assembly assembled by the piston, piston rod, piston ring, etc. into the inner cone-shaped piston sleeve 4, and clamps the piston sleeve 4 at the engine cylinder port. Then the worker grabs the handle 241 to pull the top loading mechanism 2, and the top head 231 supports the piston assembly and pushes the piston assembly into the cylinder port. The piston sleeve 4 falls off from the cylinder port under the action of gravity and falls into the sleeve limiting groove 2311. The worker lets go and the top loading mechanism 2 Under the action of the tension spring 217, the bumper 215 and the bumper block 223 are retracted to limit the retraction of the top loading mechanism 2, completing the entire piston-in-cylinder process. The operation is very simple, and it is more convenient for workers to use force when pulling than pushing from the front or side. At the same time, because there is no need to set up an additional turntable to turn the engine, it saves costs while leaving more space for workers to operate at their workstations. Compared with manual operation, the top loading mechanism 2 has the same axis as the piston assembly during top loading, and the top loading is more precise, avoiding wear or strain on the cylinder body caused by the deviation of the piston assembly.

[0044] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope defined by the claims of the present invention.

Claims

1. A piston-in-cylinder device, characterized in that: The invention comprises a bottom frame (1) and a top-loading mechanism (2), wherein the top-loading mechanism (2) comprises a bottom plate (21) and a feeding base (22), wherein a feeding slide rail (211) is fixedly connected to the bottom plate (21), a feeding slider (221) is fixedly connected to the bottom of the feeding base (22) and can slide forward and backward along the feeding slide rail (211), a top bar (23) is fixedly connected to the upper end of the feeding base (22), and a top head (231) is fixedly connected to the outer end of the top bar (23); The feeding base (22) is fixedly connected with a connecting bar (222), the connecting bar (22) is vertically arranged, and the upper part of the connecting bar (222) is fixedly connected with a pulling rod (24); The feed slide rail (211), the top bar (23) and the pull rod (24) are arranged parallel to each other.

2. The piston-in-cylinder device according to claim 1, characterized in that: The bottom plate (21) is also fixedly connected with a feed limit block (212) and a fixing frame (213), wherein the feed limit block (212) is close to the front end of the feed slide rail (211), and the fixing frame (213) is close to the rear end of the feed slide rail (211); The fixing frame (213) is fixedly provided with a limiting rod (214), one end of the limiting rod (214) facing the connecting strip (222) is provided with a bumper (215), a bumper block (223) is provided at a position on the connecting strip (222) corresponding to the bumper (215), the fixing frame (213) and the connecting strip (222) are provided with a connecting portion (216), and a tension spring (217) is connected between the two connecting portions (216).

3. The piston-in-cylinder device according to claim 1, characterized in that: The top-mounted mechanism (2) further comprises an adjustment plate (25), the front and rear parts of the adjustment plate (25) being fixedly connected to a translation slide rail (251), the bottom surface of the bottom plate (21) being fixedly connected to a translation slider (218) adapted to the translation slide rail (251), and the bottom plate (21) being capable of translationally moving left and right along the translation slide rail (251).

4. The piston-in-cylinder device according to claim 3, characterized in that: Two bearing assemblies (252) are fixedly connected to the middle of the adjustment plate (25), a translation screw (253) is connected between the two bearing assemblies (252), a translation block (219) is fixedly connected to the bottom surface of the bottom plate (21), a concave limiting groove (2191) is provided on the bottom surface of the translation block (219), a translation nut (254) is fixedly connected in the limiting groove (2191), the translation nut (254) is adapted to the translation screw (253) and the two are threadedly connected, and the translation rail (251) and the translation screw (253) are arranged parallel to each other.

5. The piston-in-cylinder device according to claim 1, characterized in that: The lifting mechanism (5) also includes a lifting mechanism (5), which includes a lifting positioning plate (51), a guide column (52) and a worm gear lifting assembly (53). The lifting positioning plate (51) is fixedly connected to the base frame (1). A guide sleeve (54) is fixedly connected to the lifting positioning plate (51). The guide column (52) passes through the guide sleeve (54) and the upper end of the guide column (52) is fixedly connected to the top loading mechanism (2). The worm gear lifting assembly (53) is fixedly connected to the lower bottom surface of the lifting positioning plate (51) and can drive the top loading mechanism (2) to move up and down.

6. The piston-in-cylinder device according to claim 1, characterized in that: It also includes a conveyor line (3) and a piston sleeve (4), wherein the conveyor line (3) is provided with a fixture (31) for fixing the engine; The ejector head (231) is columnar and horizontally arranged, one end of the ejector head (231) is fixedly connected to the ejector rod (23), and the other end faces the conveyor line (3). A sleeve limiting groove (2311) is provided on the ejector head (231), and the length of the sleeve limiting groove (2311) is greater than the length of the piston sleeve (4).

7. The piston-in-cylinder device according to claim 6, characterized in that: The top head (231) is made of nylon material, and one end of the top head (231) facing the conveying line (3) is semicircular.

8. The piston-in-cylinder device according to claim 1, characterized in that: A reinforcing frame (26) is also fixedly provided on the connecting strip (222), and the reinforcing frame (26) is in the shape of a right-angled triangle, and two right-angled sides of the reinforcing frame (26) respectively abut against the connecting strip (222) and the feeding base (22).

9. The piston-in-cylinder device according to claim 2, characterized in that: One end of the translation screw rod (253) is fixedly connected to a hand wheel assembly (255).

10. The piston-in-cylinder device according to claim 1, characterized in that: The outer end of the pull rod (24) is provided with a handle (241).

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