Cylinder sleeve honing clamp

Abstract

The utility model belongs to the technical field of machining, and particularly relates to a cylinder sleeve honing clamp which comprises a connecting disc, a through opening is formed in the middle of the connecting disc, a first annular groove communicated with the through opening is formed in the lower side wall of the connecting disc, and a plurality of annular supports are arranged on the lower side of the connecting disc. The upper side wall of the annular support is provided with an annular boss, the annular boss is clamped with the first annular groove, the lower side wall of the annular support is provided with a second annular groove, the second annular groove is matched with the annular boss, and the annular boss is provided with a plurality of connecting holes. And the connecting holes are uniformly and annularly distributed relative to the circle center of the annular boss. The multi-point clamping device has the advantages that clean compressed air is adopted to drive the single-acting air cylinder to conduct multi-point clamping on the outer wall of a workpiece, the multi-point clamping device is suitable for machining workpieces of different sizes, it is guaranteed that the workpieces are evenly stressed, the machining precision is improved, meanwhile, the single-acting air cylinder can be independently detached, and later maintenance is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, and in particular to a cylinder liner honing fixture. Background Technology

[0002] Currently, most of the fixtures used in honing cylinder liner inner bores are rubber sleeve fixtures, end face clamping fixtures, or water passage transition fit fixtures. These three types of tooling all have their own limitations. As OEMs gradually increase their requirements for inner bore dimensional accuracy, shape accuracy, and geometric tolerances, it is now necessary to design a new type of honing fixture to meet production needs.

[0003] To address the above problems, we propose a cylinder liner honing fixture. Utility Model Content

[0004] The purpose of this utility model is to solve the problems in the background art by proposing a cylinder liner honing fixture.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a cylinder liner honing fixture, comprising a connecting plate, a through-hole in the middle of the connecting plate, an annular groove I communicating with the through-hole in the lower side wall of the connecting plate, multiple annular supports on the lower side of the connecting plate, an annular boss in the upper side wall of the annular supports, the annular boss engaging with the annular groove I, an annular groove II matching the annular boss in the lower side wall of the annular supports, multiple connecting holes in the annular boss being evenly distributed in a ring about the center of the annular boss, a bolt being movably inserted into the connecting holes, a threaded hole corresponding to the connecting hole in the inner bottom wall of the annular groove I, the bolt being threadedly connected to the threaded hole I, multiple slots evenly distributed in the outer side wall of the annular supports, the slots being staggered from the connecting holes, a guide hole in the middle of the inner bottom wall of the slot, and a single-acting cylinder being disposed in the connecting hole.

[0006] In the aforementioned cylinder liner honing fixture, the single-acting cylinder includes a cylinder liner. A sliding cavity is formed in the middle of the cylinder liner. A through hole is formed in the inner bottom wall of the sliding cavity, and the through hole corresponds to a guide hole. A piston is slidably mounted on the inner side wall of the sliding cavity. A piston rod is fixedly inserted in the middle of the piston. A spring is fitted on the outer side wall of the piston rod between the inner bottom wall of the sliding cavity and the piston. The cylinder liner has threaded holes 2, 3, 2, and 3 located at the four corners of the cylinder liner. Threaded holes 2, 3, 2, and 3 all penetrate the front and rear side walls of the cylinder liner. A base is fitted on the outer side wall of the cylinder liner. The base is sealed and engaged with the front side wall of the cylinder liner. An air inlet is fixedly provided in the middle of the outer side wall of the base. A positioning hole 1 corresponding to threaded holes 2, 3, 2, and 3 is formed on the outer side wall of the base.

[0007] In the cylinder liner honing fixture described above, the outer wall of the piston rod is slidably disposed with the through hole, and a gasket is provided at the end of the piston rod.

[0008] In the cylinder liner honing fixture described above, the inner bottom wall of the annular groove one is provided with a plurality of annularly evenly distributed positioning holes two, which are offset from the threaded hole one, and the positioning holes two penetrate the connecting plate.

[0009] In the aforementioned cylinder liner honing fixture, threaded hole two and threaded hole three are arranged diagonally, and the inner bottom wall of the groove is provided with two threaded holes four corresponding to guide hole two and guide hole three.

[0010] In the cylinder liner honing fixture described above, the air inlet is securely connected to a multi-pipe exhaust connector, and the multi-pipe exhaust connector is supplied with compressed air.

[0011] In the cylinder liner honing fixture described above, the connecting disc is fixedly connected to the honing machine.

[0012] Compared with existing technologies, the advantages of this cylinder liner honing fixture are:

[0013] 1. Using compressed air as the clamping medium is clean, hygienic, and has low maintenance costs;

[0014] 2. Each single-acting cylinder is independently external, facilitating future maintenance and replacement;

[0015] 3. By using multiple clamping points to tighten the outer circle of the cylinder liner, the uniformity of the force on the outer circle can be ensured, as well as the dimensional accuracy, shape accuracy, and geometric tolerances of the inner hole.

[0016] 4. It can adapt to complex cylinder liner outer diameter structures;

[0017] 5. If the cylinder liners to be processed are of different heights or sizes, the number of annular supports can be increased or decreased as appropriate.

[0018] 6. The ring bracket can be used for coarse centering of the cylinder liner. When the piston rod is clamped, it can be used for precise centering because the force is the same.

[0019] In summary, this utility model uses clean compressed air to drive a single-acting cylinder to clamp the outer wall of the workpiece at multiple points, which is suitable for processing workpieces of different sizes, ensuring uniform force on the workpiece, improving processing accuracy, and the single-acting cylinder can be disassembled independently for easy maintenance. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a cylinder liner honing fixture proposed in this utility model;

[0021] Figure 2 This is a schematic diagram of the connecting disc of a cylinder liner honing fixture proposed in this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of an annular bracket for a cylinder liner honing fixture proposed in this utility model;

[0023] Figure 4 for Figure 1 Enlarged view of section A;

[0024] Figure 5 This is a schematic diagram of the cylinder structure of a cylinder liner honing fixture proposed in this utility model;

[0025] Figure 6 This is an internal view of the cylinder of a cylinder liner honing fixture proposed in this utility model.

[0026] In the diagram: 1 Connecting plate, 2 Through port, 3 Annular groove one, 4 Annular bracket, 5 Annular boss, 6 Connecting hole, 7 Bolt one, 8 Threaded hole one, 9 Groove, 10 Guide hole one, 11 Cylinder liner, 12 Sliding cavity, 13 Through hole, 14 Piston, 15 Piston rod, 16 Spring, 17 Threaded hole two, 18 Threaded hole three, 19 Guide hole two, 20 Guide hole three, 21 Base, 22 Air inlet, 23 Positioning hole one, 24 Gasket, 25 Positioning hole two. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0028] Reference Figures 1-6A cylinder liner honing fixture includes a connecting plate 1, which is arranged in a ring shape. A through-hole 2 is opened in the middle of the connecting plate 1. An annular groove 3 communicating with the through-hole 2 is opened on the lower side wall of the connecting plate 1. Multiple annular supports 4 are arranged on the lower side of the connecting plate 1. Annular bosses 5 are arranged on the upper side wall of the annular supports 4. The annular bosses 5 and the annular grooves 3 engage with each other. The annular grooves 3 and the annular bosses 5 facilitate quick positioning between the annular supports 4 and the connecting plate 1. When connecting the annular supports 4 and the connecting plate 1, the annular bosses 5 are inserted into the annular grooves 3, and the centers of the annular grooves 3 and the annular bosses 5 will coincide.

[0029] The inner bottom wall of the annular groove 3 is provided with multiple annularly evenly distributed positioning holes 25. The positioning holes 25 penetrate the connecting plate 1. The inner wall of the positioning holes 25 is smooth. The connecting plate 1 is fixedly connected to the honing machine. The connection method is as follows: select bolts 2 that match the positioning holes 25, insert bolts 2 into the positioning holes 25 from the lower side of the connecting plate 1, and then screw bolts 2 into the corresponding bolt holes of the honing machine. Tighten bolts 2 to press and fix the connecting plate 1 on the honing machine.

[0030] The lower side wall of the annular bracket 4 is provided with an annular groove 2, which matches the annular boss 5. When the annular brackets 4 are connected to each other, the principle is the same as that of connecting the connecting plate 1. The annular boss 5 on the annular bracket 4 is inserted into the annular groove 2 of another annular bracket 4 from below. The two annular brackets 4 will be set coaxially. The annular boss 5 is provided with multiple connecting holes 6. The inner wall of the connecting holes 6 is smooth. The connecting holes 6 are evenly distributed in annular shape about the center of the annular boss 5. A bolt 7 is movably inserted into the connecting hole 6. The inner bottom wall of the annular groove 3 is provided with a threaded hole 8 corresponding to the connecting hole 6. The bolt 7 is threadedly connected to the threaded hole 8.

[0031] Bolt 7 is used to fasten multiple annular brackets 4 to the connecting plate 1. The process is as follows: Select a bolt 7 of appropriate length, insert bolt 7 into a connecting hole 6 on one annular bracket 4, then put the remaining annular brackets 4 onto bolt 7 in sequence, and make the annular boss 5 engage with the annular groove 2. Then, insert the assembled annular brackets 4 into the annular groove 3 on the connecting plate 1, align bolt 7 with the threaded hole 8 in the annular groove 3, and tighten bolt 7. Since the annular groove 2 engages with the annular boss 5, and the annular boss 5 engages with the annular groove 3, the connecting holes 6 are aligned with each other, and the connecting holes 6 are aligned with the threaded hole 8. At this time, insert bolts 7 of the same specification into the remaining connecting holes 6 of the annular brackets 4 and tighten bolts 7, so that the multiple annular brackets 4 are fixed as a whole on the connecting plate 1.

[0032] Multiple slots 9 are evenly provided on the outer side wall of the ring bracket 4. The slots 9 are staggered from the connecting holes 6. A guide hole 10 is provided in the middle of the inner bottom wall of the slot 9. A single-acting cylinder is installed in the connecting hole 6.

[0033] A single-acting cylinder includes a cylinder liner 11. A sliding cavity 12 is formed in the middle of the cylinder liner 11. A through hole 13 is formed in the inner bottom wall of the sliding cavity 12, corresponding to a guide hole 10. The size of the through hole 13 is smaller than that of the guide hole 10. A piston 14 is slidably mounted on the inner side wall of the sliding cavity 12. A piston rod 15 is fixedly inserted in the middle of the piston 14. A spring 16 is sleeved on the outer side wall of the piston rod 15, located between the inner bottom wall of the sliding cavity 12 and the piston 14. Threaded holes 17, 18, 19, and 20 are respectively located at the four corners of the cylinder liner 11. Threaded holes 17, 18, 19, and 20 all penetrate the front and rear side walls of the cylinder liner 11. A base 21 is sleeved on the outer side wall of the cylinder liner 11, and the base 21 is sealed and engaged with the front side wall of the cylinder liner 11. Threaded holes 17 and 18 are used for fixing connecting parts. The base 21 is connected to the cylinder liner 11. Guide holes 19 and 20 are used to fix the cylinder liner 11 to the annular bracket 4. An air inlet 22 is fixedly provided in the middle of the outer side wall of the base 21. The outer side wall of the base 21 has a positioning hole 23 corresponding to the threaded hole 17, threaded hole 18, guide hole 19 and guide hole 20. Screws are inserted into the positioning holes 23 corresponding to the threaded holes 17 and 18, and screwed into the threaded holes 17 and 18. Tightening the screws can fix the base 21 and the cylinder liner 11. The outer side wall of the piston rod 15 is slidably arranged with the through hole 13. A washer 24 is provided at the end of the piston rod 15. When the piston rod 15 presses outward against the outer wall of the workpiece, the washer 24 increases the friction between the piston rod 15 and the workpiece, making the clamping more stable. At the same time, the washer 24 protects the outer wall of the workpiece from being worn by the end of the piston rod 15.

[0034] Threaded hole 17 and threaded hole 18 are diagonally arranged. At this time, guide hole 19 and guide hole 20 are also diagonally arranged, so that the force between cylinder liner 11 and annular bracket 4 and between cylinder liner 11 and base 21 is uniform, improving the stability of the connection. The inner bottom wall of slot 9 is provided with two threaded holes 4 corresponding to guide hole 19 and guide hole 20. Positioning hole 25 is offset from threaded hole 8. Long bolts are inserted into positioning holes 23 corresponding to guide hole 29 and guide hole 20, so that the end of the long bolt is screwed into threaded hole 4. After tightening the long bolt, cylinder liner 11 will be fastened to annular bracket 4.

[0035] The air inlet 22 is securely connected to the multi-pipe air outlet connector, which is supplied with compressed air. The operating steps for this fixture are as follows:

[0036] 1. Fix the connecting plate 1 to the honing machine and the ring bracket 4 to the connecting plate 1 to complete the assembly of the fixture. After the fixture is assembled, use the multi-pipe air exhaust connector to split the compressed air and connect it to the air inlet 22 on the base 21 respectively.

[0037] 2. Push the cylinder liner to be processed under the fixture by the swing arm of the machine tool, so that the cylinder liner is located in the middle of the annular bracket 4;

[0038] 3. Open the compressed air valve. The piston 14 in the single-acting cylinder is pushed by the compressed air, causing its piston rod 15 to extend and clamp the outer circle of the cylinder liner.

[0039] 4. The honing head descends to hone the inner bore of the cylinder liner. After honing, the compressed air valve is closed. The single-acting cylinder relies on the elastic force of the spring 16 inside the cylinder liner 11 to make the piston 14 drive the piston rod 15 back to its original position. After the clamp is raised, the cylinder liner is lowered normally.

[0040] The advantages of this fixture are:

[0041] 1. Using compressed air as the clamping medium is clean, hygienic, and has low maintenance costs;

[0042] 2. Each single-acting cylinder is independently external, facilitating future maintenance and replacement;

[0043] 3. By using multiple points to clamp the outer circle of the cylinder liner, the uniformity of the force on the outer circle can be ensured, and the dimensional accuracy, shape accuracy and geometric tolerance of the inner hole can be guaranteed.

[0044] 4. It can adapt to complex cylinder liner outer diameter structures;

[0045] 5. If the cylinder liners to be processed are of different heights or sizes, the number of annular supports 4 can be increased or decreased as appropriate.

[0046] 6. The annular bracket 4 can perform coarse centering of the cylinder liner. When the piston rod 15 is clamped, it can be precisely centered because the force is the same.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cylinder liner honing fixture, comprising a connecting disc (1), characterized in that, The connecting plate (1) has a through opening (2) in the middle. The lower side wall of the connecting plate (1) has an annular groove (3) communicating with the through opening (2). Multiple annular supports (4) are provided on the lower side of the connecting plate (1). An annular boss (5) is provided on the upper side wall of the annular support (4). The annular boss (5) and the annular groove (3) engage with each other. An annular groove (2) is provided on the lower side wall of the annular support (4). The annular groove (2) matches the annular boss (5). Multiple connecting holes (6) are provided on the annular boss (5). (6) The annular boss (5) is evenly distributed in a ring. A bolt (7) is movably inserted into the connecting hole (6). A threaded hole (8) corresponding to the connecting hole (6) is opened on the inner bottom wall of the annular groove (3). The bolt (7) is threadedly connected to the threaded hole (8). Multiple slots (9) are evenly opened on the outer side wall of the annular bracket (4). The slots (9) are staggered from the connecting hole (6). A guide hole (10) is opened in the middle of the inner bottom wall of the slot (9). A single-acting cylinder is installed in the connecting hole (6).

2. The cylinder liner honing fixture according to claim 1, characterized in that, The single-acting cylinder includes a cylinder liner (11), a sliding cavity (12) is provided in the middle of the cylinder liner (11), a through hole (13) is provided in the inner bottom wall of the sliding cavity (12), the through hole (13) corresponds to the guide hole (10), a piston (14) is slidably arranged on the inner side wall of the sliding cavity (12), a piston rod (15) is fixedly inserted in the middle of the piston (14), a spring (16) is sleeved on the outer side wall of the piston rod (15) between the inner bottom wall of the sliding cavity (12) and the piston (14), and threaded holes (17) and threaded threads are respectively located at the four corners of the cylinder liner (11) are provided inside the cylinder liner (11). Hole 3 (18), guide hole 2 (19) and guide hole 3 (20), threaded hole 2 (17), threaded hole 3 (18), guide hole 2 (19) and guide hole 3 (20) all penetrate the front and rear side walls of cylinder liner (11), a base (21) is fitted on the outer side wall of cylinder liner (11), the base (21) is sealed and engaged with the front side wall of cylinder liner (11), an air inlet (22) is fixedly provided in the middle of the outer side wall of the base (21), and a positioning hole 1 (23) corresponding to threaded hole 2 (17), threaded hole 3 (18), guide hole 2 (19) and guide hole 3 (20) is opened on the outer side wall of the base (21).

3. A cylinder liner honing fixture according to claim 2, characterized in that, The outer wall of the piston rod (15) is slidably disposed with the through hole (13), and a gasket (24) is provided at the end of the piston rod (15).

4. A cylinder liner honing fixture according to claim 1, characterized in that, The inner bottom wall of the annular groove (3) is provided with a plurality of annularly evenly distributed positioning holes (25). The positioning holes (25) are offset from the threaded hole (8) and the positioning holes (25) penetrate the connecting plate (1).

5. A cylinder liner honing fixture according to claim 2, characterized in that, The threaded hole 2 (17) and threaded hole 3 (18) are arranged diagonally, and the inner bottom wall of the groove (9) is provided with two threaded holes 4 corresponding to guide hole 2 (19) and guide hole 3 (20).

6. A cylinder liner honing fixture according to claim 2, characterized in that, The air inlet (22) is securely connected to the multi-pipe air outlet connector, which is supplied with compressed air.

7. A cylinder liner honing fixture according to claim 1, characterized in that, The connecting plate (1) is fixedly connected to the honing machine.

Images