A tool for assembling engine cylinder liner using a press

Abstract

The present invention discloses a tool for assembling engine cylinder sleeves by a press, which belongs to the field of cylinder sleeve assembly tooling and solves the problems of cylinder sleeve deformation, high labor intensity and low work efficiency caused by the traditional manual knocking method of assembling cylinder sleeves. The tooling includes a pressure head, a guide sleeve and a base. The base is slidably mounted on a workbench. An elastic positioning component is provided between the base and the workbench. The base above the elastic positioning component is provided with a plurality of positioning holes corresponding to the cylinder hole position along its sliding direction. The base is provided with a cylinder head positioning pin. The pressure head, guide sleeve, cylinder hole, elastic positioning component and the main shaft of the press are coaxially arranged. The tooling of the present invention can effectively solve the problem of cylinder sleeve deformation and ensure assembly quality; it can also reduce the labor intensity of workers and improve production efficiency.

Description

Technical Field

[0001] The present invention relates to a tool for assembling a cylinder sleeve, and more particularly to a tool for assembling an engine cylinder sleeve by using a press. Background Art

[0002] The FVT10 diesel engine is a V-type engine with a top cylinder bore, with two cylinder heads on the left and right, each with three cylinder bores. After the cylinder head and cylinder liner are processed, the cylinder liner needs to be assembled into the cylinder head. In the pilot production of new product development, the existing technical solution for assembling the cylinder liner of a V-type engine is: put the lower end of the cylinder liner on the cylinder bore of the cylinder head, then put the cylinder liner press tool into the inner hole at the upper end of the cylinder liner, and then use a hammer to directly hit the cylinder liner press tool. After repeated knocking, the cylinder liner is assembled in place.

[0003] The existing technical solution is to assemble the cylinder liner by manual knocking. Due to the unbalanced force on the cylinder liner, the cylinder liner is prone to skew during the assembly process, resulting in deformation of the cylinder liner when the cylinder liner is finally assembled, which seriously affects the assembly quality of the cylinder liner and thus affects the overall performance of the diesel engine. In addition, since the cylinder liner is assembled by manual knocking, the labor intensity of the workers is high and the production efficiency is low. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a tool for assembling engine cylinder liners using a press in view of the above-mentioned deficiencies in the prior art, which can effectively solve the problem of cylinder liner deformation and ensure assembly quality; and reduce the labor intensity of workers and improve production efficiency.

[0005] The technical solution of the present invention is as follows: a tool for assembling an engine cylinder liner using a press, comprising a press head, a guide sleeve and a base, the base being slidably mounted on a workbench, an elastic positioning component being provided between the base and the workbench, a plurality of positioning holes corresponding to the cylinder hole positions being provided on the base above the elastic positioning component along its sliding direction, a cylinder head positioning pin being provided on the base, and the press head, guide sleeve, cylinder hole, elastic positioning component being coaxially arranged with the main shaft of the press.

[0006] As a further improvement, a through slot penetrating the plurality of positioning holes is provided at the bottom of the base, and the through slot is slidably sleeved on the elastic positioning assembly.

[0007] Furthermore, the elastic positioning assembly includes a base positioning sleeve, a base positioning pin and a spring. The base positioning pin is movably inserted into the center hole of the workbench, the spring is installed in the inner hole of the base positioning pin and the center hole of the workbench, the base positioning sleeve is arranged on the top of the base positioning pin, and the base positioning sleeve is slidably connected to the through groove.

[0008] Furthermore, the top surface of the base positioning sleeve is a spherical surface, the bottom surface of the positioning hole is a conical surface, and the top surface of the base positioning sleeve is matched with the bottom surface of the positioning hole.

[0009] Furthermore, the guide sleeve is an arc-shaped sleeve, and the upper and lower ends of the guide sleeve are respectively provided with an upper arc surface and a lower arc surface that are adapted to the upper outer circle and the lower outer circle of the cylinder sleeve. The lower end of the guide sleeve is also provided with an outer cylinder that is adapted to the stop circle of the cylinder hole, and a clearance groove is also provided between the upper arc surface and the lower arc surface.

[0010] Furthermore, the pressure head and the press are separately arranged, the top of the pressure head is a spherical surface, and the bottom of the pressure head is provided with a positioning column adapted to the inner diameter of the cylinder sleeve, and a step surface is formed between the positioning column and the pressure head.

[0011] Furthermore, an end face positioning block is provided at one end of the base, and the distance between the end face positioning block and the cylinder head positioning pin is equal to the distance between the left cylinder head end face and the left cylinder head positioning hole. At least one left side side positioning block is provided on one side of the base, and the distance between the left side side positioning block and the cylinder head positioning pin is equal to the distance between the left cylinder head side and the left cylinder head positioning hole.

[0012] Furthermore, the distance between the end face positioning block and the cylinder head positioning pin is equal to the distance between the right cylinder head end face and the right cylinder head positioning hole, and at least one right side face positioning block is also provided on the other side of the base, and the distance between the right side face positioning block and the cylinder head positioning pin is equal to the distance between the right cylinder head side face and the right cylinder head positioning hole.

[0013] Furthermore, handles are provided at both ends of the base.

[0014] Furthermore, support plates are provided on both sides of the top surface of the base.

[0015] Beneficial Effects

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. The tooling of the present invention provides a guide sleeve on the periphery of the cylinder sleeve, utilizes the upper arc surface and the lower arc surface of the guide sleeve to closely contact the upper outer circle and the lower outer circle of the guide cylinder sleeve, and utilizes the outer cylinder to be inserted into the stop circle of the cylinder hole, so that the cylinder sleeve and the cylinder hole are on the same axis line. In the process of pressing the pressure head of the press machine to press the cylinder sleeve into the cylinder hole, the problem of cylinder sleeve deformation can be effectively solved to ensure the assembly quality.

[0018] 2. The tooling of the present invention arranges an elastic positioning component on a workbench directly below the press, and opens a plurality of positioning holes on the base corresponding to the positions of the cylinder holes. When the base moves onto the elastic positioning component, the base positioning sleeve pops out under the action of a spring and is inserted into the positioning hole, so that the press, the pressure head, and the cylinder hole are coaxially arranged, and the cylinder liner can be press-fitted. After the press-fitting is completed, the base is dragged to move so that the next positioning hole cooperates with the elastic positioning component, and the cylinder liner of the next cylinder hole can be press-fitted. This cycle is repeated to complete the press-fitting of the cylinder liners of all cylinder holes, thereby reducing the labor intensity of workers and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0020] Figure 2 It is an enlarged schematic diagram of the three-dimensional structure of the guide sleeve in the present invention;

[0021] Figure 3 It is an enlarged schematic diagram of the cross-sectional structure of the pressure head in the present invention;

[0022] Figure 4 It is a schematic diagram of the main structure when the cylinder sleeve corresponding to the left cylinder head is press-fitted according to the present invention;

[0023] Figure 5 It is a schematic diagram of the top view of the structure when the cylinder sleeve corresponding to the left cylinder head is press-fitted according to the present invention;

[0024] Figure 6 for Figure 4 Schematic diagram of the cross-sectional structure of AA;

[0025] Figure 7 for Figure 5 Schematic diagram of the cross-sectional structure of the CC;

[0026] Figure 8 for Figure 5 Schematic diagram of the cross-sectional structure of the middle BB;

[0027] Fig. 9 It is a schematic diagram of the top view of the structure when the cylinder sleeve corresponding to the right cylinder head is press-fitted according to the present invention;

[0028] Fig.10 for Figure 7 A magnified schematic diagram of the structure at K in the middle;

[0029] Fig.11 It is an enlarged schematic diagram of the cross-sectional structure of a cylinder liner in the prior art.

[0030] Among them: 1-workbench, 2-pressure head, 3-guide sleeve, 4-base, 5-positioning hole, 6-cylinder head positioning pin, 7-cylinder hole, 8-through groove, 9-base positioning sleeve, 10-base positioning pin, 11-spring, 12-cylinder sleeve, 13-left side positioning block, 14-left cylinder head, 15-left cylinder head positioning hole, 16-right side positioning block, 17-right cylinder head, 18-handle, 19-support plate, 20-stop circle, 21-end face positioning block, 2a-positioning column, 2b-step surface, 3a-upper arc surface, 3b-lower arc surface, 3c-outer cylinder, 3d-make way groove, 12a-upper outer circle, 12b-lower outer circle, 12c-boss. DETAILED DESCRIPTION

[0031] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0032] See also Figure 1-11 The present invention discloses a tool for assembling an engine cylinder sleeve by a press, comprising a press head 2, a guide sleeve 3 and a base 4, wherein the base 4 is slidably mounted on a workbench 1, and an elastic positioning component is provided between the base 4 and the workbench 1, wherein the base 4 above the elastic positioning component is provided with a plurality of positioning holes 5 corresponding to the positions of cylinder holes 7 along its sliding direction, and the number of positioning holes 5 is consistent with the number of cylinder holes 7, and the base 4 is dragged to slide relative to the workbench 1, so that different positioning holes 5 can be switched to contact with the elastic positioning component, so as to realize the switching of different cylinder holes 7, and a cylinder head positioning pin 6 is provided on the base 4, wherein the middle part of the cylinder head positioning pin 6 is conical, the upper part is cylindrical, and the head is bullet-shaped, which can increase the rigidity of the pin and smoothly insert and position the left cylinder head 14 or the right cylinder head 17, wherein the press head 2, the guide sleeve 3, the cylinder hole 7, the elastic positioning component and the main shaft of the press are coaxially arranged to ensure that they are coaxial with the cylinder sleeve 12 and the cylinder hole 7 when the press is pressed down.

[0033] Preferably, a through slot 8 penetrating the plurality of positioning holes 5 is provided at the bottom of the base 4 , and the through slot 8 is slidably sleeved on the elastic positioning assembly to guide the sliding of the base 4 .

[0034] Preferably, the elastic positioning assembly includes a base positioning sleeve 9, a base positioning pin 10 and a spring 11, wherein the base positioning pin 10 is movably inserted in the center hole of the workbench 1, the spring 11 is installed in the inner hole of the base positioning pin 10 and the center hole of the workbench 1, and the two ends of the spring 11 are respectively connected to the bottom of the center hole of the workbench 1 and the bottom of the inner hole of the base positioning pin 10, the base positioning sleeve 9 is sleeved on the top of the base positioning pin 10, and the base positioning sleeve 9 is slidably connected to the through groove 8, and the base positioning sleeve 9 is popped out and inserted into the positioning hole 5 under the elastic force of the spring 11 to realize the positioning of the base 4.

[0035] Preferably, the top surface of the base positioning sleeve 9 is a spherical surface, the bottom surface of the positioning hole 5 is a conical surface, and the top surface of the base positioning sleeve 9 is adapted to the bottom surface of the positioning hole 5, so that the base positioning sleeve 9 fits tightly with the positioning hole 5, thereby realizing the center positioning of the positioning hole 5 on the base 4 and the cylinder hole 7 and the press.

[0036] Preferably, the guide sleeve 3 is an arc-shaped sleeve, and the upper and lower ends of the guide sleeve 3 are respectively provided with an upper arc surface 3a and a lower arc surface 3b that are adapted to the upper outer circle 12a and the lower outer circle 12b of the cylinder sleeve 12, for positioning the cylinder sleeve 12. The lower end of the guide sleeve 3 is also provided with an outer cylinder 3c that is adapted to the stop circle 20 of the cylinder hole 7, for positioning the guide sleeve 3. A clearance groove 3d is also provided between the upper arc surface 3a and the lower arc surface 3b to prevent the guide sleeve 3 from interfering with the boss 12c of the cylinder sleeve 12.

[0037] Preferably, the ram 2 and the press are separately arranged to facilitate replacement of different rams for use. The top of the ram 2 is a spherical surface, so that the main axis of the press acts on the center line of the ram 2. A positioning column 2a adapted to the inner diameter of the cylinder sleeve 12 is provided at the bottom of the ram 2 for positioning the ram 2 so that it is coaxial with the cylinder sleeve 12. A step surface 2b is formed between the positioning column 2a and the ram 2. The step surface 2b is used to transmit the force of the press to the cylinder sleeve 12 to achieve extrusion assembly of the cylinder sleeve.

[0038] Preferably, an end face positioning block 21 is provided at one end of the base 4, and the distance between the end face positioning block 21 and the cylinder head positioning pin 6 is equal to the distance between the end face of the left cylinder head 14 and the left cylinder head positioning hole 15. At least one left side side positioning block 13 is provided on one side of the base 4, wherein the distance between the left side side positioning block 13 and the cylinder head positioning pin 6 is equal to the distance between the side face of the left cylinder head 14 and the left cylinder head positioning hole 15. Through the cooperation of the end face positioning block 21 and the left side side positioning block 13, a pre-positioning function is played when the pin is inserted, so that the insertion of the left cylinder head 14 is smoother.

[0039] Preferably, the distance between the end face positioning block 21 and the cylinder head positioning pin 6 is equal to the distance between the end face of the right cylinder head 17 and the right cylinder head positioning hole. At least one right side positioning block 16 is also provided on the other side of the base 4. The distance between the right side positioning block 16 and the cylinder head positioning pin 6 is equal to the distance between the side face of the right cylinder head 17 and the right cylinder head positioning hole. Through the cooperation of the end face positioning block 21 and the right side positioning block 16, a pre-positioning effect is achieved when the pin is inserted, so that the insertion of the right cylinder head 17 is smoother.

[0040] Preferably, handles 18 are provided at both ends of the base 4 to facilitate dragging the base 4 .

[0041] Preferably, support plates 19 are provided on both sides of the top surface of the base 4 for supporting the cylinder cover.

[0042] When assembling the cylinder sleeve 12 corresponding to the left cylinder head 14, the tooling of the present invention is used to position the left cylinder head 14 through the cylinder head positioning pin 6 and place it on the support plate 19, and then the lower outer circle 12b of the lower end of the cylinder sleeve 12 is placed on the opening of the cylinder hole 7 of the left cylinder head 14, and then the outer cylinder 3c of the guide sleeve 3 is inserted into the stop circle 20 of the cylinder hole 7, and then the upper outer circle 12a and the lower outer circle 12b of the cylinder sleeve 12 are closely attached to the upper arc surface 3a and the lower arc surface 3b of the guide sleeve 3, so that the center of the cylinder sleeve 12 is aligned with the center of the cylinder hole 7 of the left cylinder head 14; then, the positioning column 2a at the lower part of the pressure head 2 is inserted into the cylinder sleeve 12, and the press machine is operated, and the pressure head 2 is pressed on the upper end surface of the cylinder sleeve 12 through the step surface 2b, so that the cylinder sleeve 12 is inserted into the cylinder hole 7 of the left cylinder head 14. The force is evenly applied during the process to avoid deformation of the cylinder sleeve. When the main shaft of the press presses the cylinder sleeve 12 downward for a distance (about 30 mm), the guide sleeve 3 is removed, and then the cylinder sleeve 12 is pressed downward until the lower annular surface of the middle boss of the cylinder sleeve 12 is pressed against the shoulder surface of the cylinder hole stop 20. Among them, the guide sleeve 3 is made into an arc shape for easy installation and removal; after the cylinder sleeve 12 of a cylinder hole 7 is pressed, the handle 18 is dragged to make the spherical surface of the upper part of the base positioning sleeve 9 press against the conical surface of the next positioning hole 5, so as to realize the center positioning of the next cylinder hole 7 on the main shaft of the press, and the cylinder sleeve of the second cylinder hole is pressed according to the above-mentioned pressing operation. In this cycle, the cylinder sleeves 12 of all cylinder holes 7 are pressed, which effectively reduces the labor intensity and improves the work efficiency. Similarly, the cylinder sleeve 12 corresponding to the right cylinder head 17 can be pressed by repeating the above-mentioned pressing process, so that the cylinder sleeves corresponding to the two cylinder heads can be pressed on one tooling, which has a wide range of applications.

[0043] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A tool for assembling an engine cylinder liner using a press, characterized in that: The invention comprises a pressing head (2), a guide sleeve (3) and a base (4), wherein the base (4) is slidably mounted on a workbench (1), an elastic positioning component is provided between the base (4) and the workbench (1), a plurality of positioning holes (5) corresponding to the position of a cylinder hole (7) are provided on the base (4) above the elastic positioning component along its sliding direction, a cylinder head positioning pin (6) is provided on the base (4), the pressing head (2), the guide sleeve (3), the cylinder hole (7) and the elastic positioning component are coaxially arranged with the main shaft of the press, and is characterized in that the bottom of the base (4) is provided with a A through groove (8) is provided which passes through a plurality of positioning holes (5); the through groove (8) is slidably sleeved on an elastic positioning component; the elastic positioning component comprises a base positioning sleeve (9), a base positioning pin (10) and a spring (11); the base positioning pin (10) is movably plugged into a center hole opened on a workbench (1); the spring (11) is installed in an inner hole of the base positioning pin (10) and in the center hole of the workbench (1); the base positioning sleeve (9) is sleeved on the top of the base positioning pin (10), and the base positioning sleeve (9) is slidably connected to the through groove (8).

2. A tool for assembling an engine cylinder liner by a press machine according to claim 1, characterized in that: The top surface of the base positioning sleeve (9) is a spherical surface, the bottom surface of the positioning hole (5) is a conical surface, and the top surface of the base positioning sleeve (9) is matched with the bottom surface of the positioning hole (5).

3. The tooling for assembling an engine cylinder liner by a press machine according to claim 1, characterized in that: The guide sleeve (3) is an arc-shaped sleeve, and the upper and lower ends of the guide sleeve (3) are respectively provided with an upper arc surface (3a) and a lower arc surface (3b) that match the upper outer circle (12a) and the lower outer circle (12b) of the cylinder sleeve (12). The lower end of the guide sleeve (3) is also provided with an outer cylinder (3c) that matches the stop circle (20) of the cylinder hole (7), and a clearance groove (3d) is also provided between the upper arc surface (3a) and the lower arc surface (3b).

4. The tooling for assembling an engine cylinder liner by a press machine according to claim 1, characterized in that: The pressure head (2) and the press are arranged separately, the top of the pressure head (2) is a spherical surface, the bottom of the pressure head (2) is provided with a positioning column (2a) adapted to the inner diameter of the cylinder sleeve (12), and a step surface (2b) is formed between the positioning column (2a) and the pressure head (2).

5. The tooling for assembling an engine cylinder liner by a press machine according to claim 1, characterized in that: An end surface positioning block (21) is provided at one end of the base (4), and the distance between the end surface positioning block (21) and the cylinder head positioning pin (6) is equal to the distance between the end surface of the left cylinder head (14) and the left cylinder head positioning hole (15). At least one left side surface positioning block (13) is provided at one side of the base (4), and the distance between the left side surface positioning block (13) and the cylinder head positioning pin (6) is equal to the distance between the side surface of the left cylinder head (14) and the left cylinder head positioning hole (15).

6. A tool for assembling an engine cylinder liner by a press machine according to claim 5, characterized in that: The distance between the end surface positioning block (21) and the cylinder head positioning pin (6) is equal to the distance between the end surface of the right cylinder head (17) and the right cylinder head positioning hole. The other side of the base (4) is further provided with at least one right side surface positioning block (16). The distance between the right side surface positioning block (16) and the cylinder head positioning pin (6) is equal to the distance between the side surface of the right cylinder head (17) and the right cylinder head positioning hole.

7. A tool for assembling an engine cylinder liner by a press machine according to any one of claims 1 to 6, characterized in that: Handlebars (18) are also provided at both ends of the base (4).

8. The tool for assembling an engine cylinder liner by a press machine according to claim 7, characterized in that: Support plates (19) are also provided on both sides of the top surface of the base (4).

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