Compressor cylinder boring positioning clamp

Abstract

The utility model discloses a compressor cylinder boring positioning clamp, and particularly relates to the technical field of compressor tooling, the compressor cylinder boring positioning clamp comprises a clamp mounting shell, a middle hole fixing assembly, a boring positioning assembly and a driving piece, a first movable cavity is formed in the clamp mounting shell, the middle hole fixing assembly is located in the first movable cavity, and the boring positioning assembly is located in the middle hole fixing assembly. A second movable cavity is formed in the side portion of the clamp installation shell, a transmission mechanism is arranged between the driving piece and the center hole fixing assembly, and a linkage mechanism is arranged between the center hole fixing assembly and the boring hole positioning assembly. According to the utility model, the cylinder body is bored through the linkage mechanism, and the quality precision is improved by self blank hole positioning; the expanding part of the boring positioning assembly extrudes the tightening part to enable the outer sleeve to expand outwards, and after positioning and clamping are conducted, the boring positioning assembly is drawn out in a hole, and mutual interference with a subsequent machining tool is avoided; and finally, the interior of the compressor cylinder bored hole is fixed.

Description

Technical Field

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

[0002] It is known that the cylinder block is an extremely important part in the automobile air-conditioning compressor. Since the appearance of different cylinder blocks varies greatly, the internal processing dimensions are also very different. In particular, the cylinder valve plate surface has many bolt holes, locating pin holes, vent holes, crescent grooves and other features that need to be processed. Therefore, in the process of boring the compressor cylinder block with clamping tooling, the compressor cylinder block needs to be fixed, and after fixing, the compressor cylinder block needs to be positioned. The boring of the compressor cylinder block needs to correspond to the processing equipment in order to position the boring on the compressor cylinder block.

[0003] However, in actual use, since the positioning method is basically based on the external features of the compressor cylinder body, and the external structure of the compressor cylinder body is diverse, there are situations where positioning is difficult and inaccurate. Therefore, a compressor cylinder body boring positioning fixture is proposed as a further improvement. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, an embodiment of the utility model provides a compressor cylinder boring positioning fixture to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a compressor cylinder boring positioning fixture, comprising a fixture mounting shell, a center hole fixing assembly, a boring positioning assembly and a driving member, wherein the bottom of the fixture mounting shell is fixedly mounted on the top of a workbench;

[0006] A first movable cavity is provided inside the fixture installation shell and is passed through from top to bottom. The center hole fixing assembly is located in the first movable cavity, and the top of the center hole fixing assembly passes through the fixture installation shell. A second movable cavity is provided on the side of the fixture installation shell, and the boring hole positioning assembly is located in the second movable cavity, and the top of the boring hole positioning assembly passes through the fixture installation shell.

[0007] The bottom of the compressor cylinder body is placed on the fixture mounting housing, and the center hole fixing assembly is inserted into the center hole of the compressor cylinder body, and the boring hole positioning assembly is inserted into the boring hole of the compressor cylinder body;

[0008] The driving member is fixedly installed in the middle of the bottom surface of the workbench, and a transmission mechanism is arranged between the driving member and the center hole fixing assembly, and a linkage mechanism is arranged between the center hole fixing assembly and the boring hole positioning assembly.

[0009] Further, the center hole fixing assembly comprises: a cone skirt cover and a cone column;

[0010] The bottom of the cone column is fixedly connected to the bottom of the first movable cavity, and the cone skirt outer cover is movably sleeved on the top of the cone column.

[0011] Further, the transmission mechanism comprises: a connecting bar and a connecting ring;

[0012] The output end of the driving member inserted into the first movable cavity is fixedly connected to the connecting ring through a connecting strip. The connecting ring is movably sleeved on the cone column, and the top of the connecting ring is fixedly connected to the bottom of the cone skirt outer cover.

[0013] Further, the boring and positioning assembly comprises: an outer sleeve and an embedded column;

[0014] The outer sleeve is movably sleeved on the outer surface of the embedded column, and the bottom of the outer sleeve is fixedly connected to the bottom of the second movable cavity through an elastic reset member;

[0015] A limit slot is provided inside the outer sleeve, and a support portion is fixedly installed on the top of the embedded column inserted into the limit slot, and a tightening portion is fixedly installed on the inner wall of the limit slot, the sum of the widths of the tightening portion and the support portion is greater than the width of the limit slot, and the tightening portion is pressed and contacted with the support portion;

[0016] The embedded column is inserted into the side of the limiting slot and a limiting convex ring is fixedly installed thereon. The limiting convex ring is clamped with the bottom of the limiting slot.

[0017] Further, the linkage mechanism comprises: a gear rod, a first gear and a second gear;

[0018] The top of the gear rod is fixedly mounted on the bottom of the embedded column, a rotation groove is provided on the side wall of the first movable cavity, a rotation shaft is rotatably connected in the rotation groove, the centers of the first gear and the second gear are fixedly sleeved on the rotation shaft, the gear rod inserted from the second movable cavity into the first movable cavity is meshed with the first gear, and a tooth pattern portion meshed with the second gear is provided on the side of the connecting ring;

[0019] The radius of the first gear is greater than the radius of the second gear.

[0020] Furthermore, at least one opening is provided on the upper portion of the outer sleeve; and at least one opening is provided on the top and the side wall of the cone skirt outer cover.

[0021] Furthermore, the materials of the outer sleeve and the cone skirt outer cover are both set to spring steel with good elasticity.

[0022] Technical effects and advantages of the utility model:

[0023] 1. Compared with the prior art, a transmission mechanism is provided and a driving member is used to drive the cone skirt cover to descend along the cone column, so that the diameter of the cone skirt cover at the force application point is increased eventually, and the cone skirt cover is stretched and tightened, so as to fix the center hole of the compressor cylinder body; a boring positioning assembly is provided and the tightening portion on the internal limiting groove of the outer sleeve is squeezed by the stretching portion at the top of the embedded column to make the outer sleeve bulge outward, so that the diameter of the outer sleeve becomes larger and contacts the inner wall of the boring hole of the compressor cylinder body; and after the boring positioning assembly is positioned and clamped, the embedded column continues to descend and is restricted by the limiting groove of the outer sleeve, and then the boring positioning assembly descends; the boring positioning assembly is drawn out in the hole to avoid mutual interference with subsequent processing tools; and finally the inside of the boring hole of the compressor cylinder body is fixed, so as to facilitate the processing of the inner wall of the boring hole of the compressor cylinder body.

[0024] 2. Compared with the prior art, by setting up a linkage mechanism, not only the driving member is used to drive the cone skirt outer cover to descend along the cone column, thereby increasing the diameter of the cone skirt outer cover at the force application point, and stretching and tightening the cone skirt outer cover; but the cone skirt outer cover can also be lowered to drive the gear rod to descend, thereby causing the outer sleeve to bulge outward, so that the diameter of the outer sleeve becomes larger and contacts the inner wall of the compressor cylinder bore, thereby fixing the inside of the compressor cylinder bore and finally achieving precise positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0026] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model.

[0027] Figure 3 It is a schematic diagram of the structure of the utility model from top view.

[0028] Figure 4 For this utility model Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0029] Figure 5 For this utility model Figure 1 Schematic diagram of the enlarged structure at point B in the middle.

[0030] The accompanying drawings are marked as follows:

[0031] 1. Clamp mounting housing; 11. First movable cavity; 12. Second movable cavity; 13. Rotation slot;

[0032] 2. Middle hole fixing assembly; 21. Cone skirt outer cover; 22. Cone column;

[0033] 3. Boring positioning components;

[0034] 31. outer sleeve; 311. limit slot; 312. tightening part;

[0035] 32. Embedded column; 321. Opening portion; 322. Position limiting convex ring;

[0036] 4. Driving parts; 5. Workbench;

[0037] 6. Transmission mechanism; 61. Connecting strip; 62. Connecting ring; 621. Tooth pattern portion;

[0038] 7. linkage mechanism; 71. gear rod; 72. first gear; 73. second gear; 74. rotating shaft;

[0039] 8. Elastic reset element. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0041] Example:

[0042] As attached Figure 1-5 A compressor cylinder boring positioning fixture shown includes a fixture mounting housing 1, a center hole fixing assembly 2, a boring positioning assembly 3 and a driving member 4, wherein the bottom of the fixture mounting housing 1 is fixedly mounted on the top of a workbench 5;

[0043] A first movable cavity 11 is provided inside the fixture installation housing 1 and is passed through from top to bottom. The center hole fixing component 2 is located in the first movable cavity 11, and the top of the center hole fixing component 2 passes through the fixture installation housing 1. A second movable cavity 12 is provided on the side of the fixture installation housing 1. The boring hole positioning component 3 is located in the second movable cavity 12, and the top of the boring hole positioning component 3 passes through the fixture installation housing 1.

[0044] The bottom of the compressor cylinder is placed on the fixture mounting housing 1, and the center hole fixing assembly 2 is inserted into the center hole of the compressor cylinder, and the boring hole positioning assembly 3 is inserted into the boring hole of the compressor cylinder;

[0045] The driving member 4 is fixedly installed in the middle of the bottom surface of the workbench 5 , and a transmission mechanism 6 is arranged between the driving member 4 and the center hole fixing assembly 2 , and a linkage mechanism 7 is arranged between the center hole fixing assembly 2 and the boring hole positioning assembly 3 .

[0046] Among them, the compressor cylinder boring positioning fixture proposed in this embodiment is used to fix and position the compressor cylinder to facilitate the subsequent boring inner wall processing;

[0047] The fixture installation housing 1 uses the first active cavity 11 as a hollow structure in the middle, and the structure of the fixture installation housing 1 is consistent with the internal structure of the compressor cylinder body. The fixture installation housing 1 can be a cylindrical structure; a plurality of axial through holes are opened on the fixture installation housing 1, and the fixture installation housing 1 can be axially fixed to the upper surface of the workbench 5 by screws through the through holes;

[0048] Among them, the workbench 5 forms a supporting structure, and the workbench 5 can be a table structure similar to a processing table top; when installing, the driving member 4 can be installed on the bottom of the workbench 5 by screws, so that the driving member 4 and the fixture mounting shell 1 can be separated, thereby increasing the operating space.

[0049] When the compressor cylinder is placed on the fixture mounting housing 1, the center hole fixing assembly 2 is used to be inserted into the center hole of the compressor cylinder to fix the center hole of the compressor cylinder;

[0050] The boring hole positioning component 3 is used to insert into the boring hole of the compressor cylinder body to position the compressor cylinder body, so that the side hole of the compressor cylinder body can correspond to the position of the processing equipment.

[0051] In a preferred embodiment, as shown in the attached Figure 1-5 As shown, the middle hole fixing assembly 2 includes: a cone skirt outer cover 21 and a cone column 22;

[0052] The bottom of the cone column 22 is fixedly connected to the bottom of the first movable cavity 11 , and the cone skirt outer cover 21 is movably sleeved on the top of the cone column 22 .

[0053] Among them, the upper part of the cone column 22 can be a cone-shaped structure; the cone skirt outer cover 21 is mounted on the cone column 22, and the cone skirt outer cover 21 can be raised and lowered in the first movable cavity 11; and the interior of the cone skirt outer cover 21 is a cone-shaped hollow structure, and the inner wall of the cone skirt outer cover 21 is consistent with the cone column 22, and then the upper part of the cone skirt outer cover 21 and the cone column 22 can be a cone or a pyramid structure.

[0054] In a preferred embodiment, as shown in the attached Figure 1-5 As shown, the transmission mechanism 6 includes: a connecting bar 61 and a connecting ring 62;

[0055] The output end of the driving member 4 inserted into the first movable cavity 11 is fixedly connected to the connecting ring 62 through the connecting strip 61 . The connecting ring 62 is movably sleeved on the cone column 22 , and the top of the connecting ring 62 is fixedly connected to the bottom of the cone skirt outer cover 21 .

[0056] The driving member 4 may be a gas cylinder or an oil cylinder, and its output end is connected to the cone skirt cover 21 through a connecting strip 61, so the driving member 4 can drive the cone skirt cover 21 to rise and fall, and the specific control is:

[0057] If the center hole of the compressor cylinder is fixed, the driving member 4 pulls the connecting ring 62 through the connecting strip 61 to lower the cone skirt cover 21. When the cone skirt cover 21 slides axially relative to the cone column 22, the cone column 22 increases the diameter of the cone skirt cover 21 at the point where the cone column 22 applies force, so that the cone skirt cover 21 is stretched and tightened, thereby fixing the center hole of the compressor cylinder.

[0058] If the compressor cylinder is to be released, the driving member 4 pushes the connecting ring 62 through the connecting strip 61 to lift the cone skirt outer cover 21. When the cone skirt outer cover 21 slides axially relative to the cone column 22, the cone skirt outer cover 21 will gradually tighten due to the reduction in diameter of the point where the cone column 22 applies force to the cone skirt outer cover 21, thereby completing the release of the compressor cylinder.

[0059] In a preferred embodiment, as shown in the attached Figure 1-5 As shown, the boring positioning assembly 3 includes: an outer sleeve 31 and an embedded column 32;

[0060] The outer sleeve 31 is movably sleeved on the outer surface of the embedded column 32, and the bottom of the outer sleeve 31 is fixedly connected to the bottom of the second movable cavity 12 through an elastic reset member 8;

[0061] The outer sleeve 31 has a limit slot 311 formed inside, and the inner column 32 is inserted into the limit slot 311 and fixedly mounted with a spread portion 321 on the top thereof, and a tightening portion 312 is fixedly mounted on the inner wall of the limit slot 311. The sum of the widths of the tightening portion 312 and the spread portion 321 is greater than the width of the limit slot 311, and the tightening portion 312 is pressed and contacts the spread portion 321.

[0062] The embedded column 32 is inserted into the side of the limiting slot 311 and fixedly mounted with a limiting convex ring 322 . The limiting convex ring 322 is engaged with the bottom of the limiting slot 311 .

[0063] The outer sleeve 31 is lifted and lowered in the second movable cavity 12 of the clamp installation housing 1, and the elastic reset member 8 can lift the outer sleeve 31; and the elastic reset member 8 can be a spring, an elastic washer, etc.

[0064] The embedded column 32 can be raised and lowered in the limit slot 311 provided in the outer sleeve 31;

[0065] The specific control of the decline is:

[0066] When the gear rod 71 drives the embedded column 32 to descend, the gear rod 71 pulls the embedded column 32 to move axially in the limiting groove 311 inside the outer sleeve 31, and then the expansion portion 321 at the top of the embedded column 32 squeezes the tightening portion 312 on the limiting groove 311 inside the outer sleeve 31 to make the outer sleeve 31 bulge outward, so that the diameter of the outer sleeve 31 increases and contacts the inner wall of the compressor cylinder bore, thereby achieving precise positioning; if the gear rod 71 continues to pull, the embedded column 32 pulls the outer sleeve When the cylinder 31 moves downward, the expansion portion 321 slides over the tightening portion 312, and the limiting groove 311 provided on the outer sleeve 31 blocks the limiting convex ring 322; at this time, after the boring positioning assembly 3 is positioned and clamped, the gear rod 71 continues to pull the embedded column 32 and the outer sleeve 31 to descend at the same time and compress the elastic reset member 8; in this way, the boring positioning assembly 3 is drawn out in the hole to avoid interference with subsequent processing tools; finally, the positioning is completed, which is convenient for processing the inner wall of the boring hole of the compressor cylinder body;

[0067] The top of the outer sleeve 31 may be provided with a chamfer or a slope structure to facilitate the outer sleeve 31 to enter the inside of the boring hole;

[0068] In a preferred embodiment, as shown in the attached Figure 1-5 As shown, the linkage mechanism 7 includes: a gear rod 71, a first gear 72 and a second gear 73;

[0069] The top of the gear rod 71 is fixedly mounted on the bottom of the embedded column 32. A rotation groove 13 is provided on the side wall of the first movable cavity 11. A rotation shaft 74 is rotatably connected in the rotation groove 13. The centers of the first gear 72 and the second gear 73 are fixedly sleeved on the rotation shaft 74. The gear rod 71 that penetrates from the second movable cavity 12 into the first movable cavity 11 is meshed with the first gear 72. A toothed portion 621 that meshes with the second gear 73 is provided on the side of the connecting ring 62.

[0070] The radius of the first gear 72 is greater than the radius of the second gear 73 .

[0071] The linkage mechanism 7 utilizes the toothed portion 621 of the connecting ring 62 to mesh with the second gear 73, and the second gear 73 rotates coaxially with the first gear 72 through the rotating shaft 74, and the first gear 72 meshes with the gear rod 71. Then, when the driving member 4 pushes the connecting ring 62 through the connecting strip 61 to lift the cone skirt outer cover 21 and make the cone skirt outer cover 21 slide axially relative to the cone column 22, the connecting ring 62 is lifted to make the second gear 73 drive the first gear 72 to rotate, and then the first gear 72 rotates to drive the gear rod 71 to lift, and finally the gear rod 71 drives the embedded column 32 to lift; similarly, the driving member 4 pulls the cone skirt outer cover 21 down through the connecting strip 61, so that the gear rod 71 pulls the embedded column 32 down;

[0072] The radius of the first gear 72 is larger than the radius of the second gear 73, so that the lifting and lowering displacement distance of the boring positioning assembly 3 is larger than the lifting and lowering displacement distance of the cone skirt outer cover 21, so as to achieve the effect of amplifying and transmitting the lifting and lowering displacement of the cone skirt outer cover 21;

[0073] Specific embodiment: the lifting displacement of the cone skirt outer cover 21 is 2-3 cm, and the lifting displacement of the boring hole positioning component 3 is 4-6 cm.

[0074] In a preferred embodiment, as shown in the attached Figure 1-5 As shown, at least one opening is provided on the upper portion of the outer sleeve 31; at least one opening is provided on the top and side wall of the cone skirt outer cover 21; so as to facilitate expansion by utilizing the openings; wherein, there are very small gaps on the outer sleeve 31 and the cone skirt outer cover 21 for easy expansion.

[0075] In a preferred embodiment, as shown in the attached Figure 1-5 As shown, the materials of the outer sleeve 31 and the cone skirt outer cover 21 are both set to spring steel with good elasticity;

[0076] For example use: Material 65Mn spring steel.

[0077] Working principle of the utility model: when in use, first place the compressor cylinder body on the fixture mounting housing 1, insert the center hole fixing component 2 into the center hole of the compressor cylinder body; and insert the boring hole positioning component 3 into the boring hole of the compressor cylinder body;

[0078] Subsequently, the driving member 4 pulls the cone skirt cover 21 downward through the connecting strip 61, and the cone skirt cover 21 slides down along the outer wall of the cone column 22. The diameter of the cone column 22 at the point where the cone skirt cover 21 is applied with force increases, and the cone skirt cover 21 is stretched and tightened, thereby fixing the center hole of the compressor cylinder body.

[0079] When the cone skirt outer cover 21 descends, the linkage mechanism 7 is used to pull the toothed rod 71 to pull the embedded column 32 down in the limiting groove 311 inside the outer sleeve 31, so that the open portion 321 at the top of the embedded column 32 squeezes the tightening portion 312 on the limiting groove 311 inside the outer sleeve 31 to make the outer sleeve 31 bulge outward, so that the diameter of the outer sleeve 31 becomes larger and contacts the inner wall of the compressor cylinder bore, thereby fixing the inside of the compressor cylinder bore. At this time, after the boring hole positioning assembly 3 is positioned and clamped, the toothed rod 71 continues to pull the embedded column 32 and the outer sleeve 31 to descend at the same time and compress the elastic reset member 8; in this way, the boring hole positioning assembly 3 is drawn out in the hole to avoid interference with subsequent processing tools; and finally accurate positioning is achieved;

[0080] If the compressor cylinder needs to be released, the driving member 4 pushes the connecting ring 62 through the connecting strip 61 to lift the cone skirt cover 21, so that the diameter of the cone column 22 at the point where the cone skirt cover 21 is applied with force is reduced, and the cone skirt cover 21 is gradually tightened, thereby completing the release of the center hole of the compressor cylinder;

[0081] The cone skirt outer cover 21 is lifted, and the gear rod 71 lifts the embedded column 32 through the linkage mechanism 7, and then the elastic reset member 8 is used to lift the embedded column 32 and the outer sleeve 31. Subsequently, the outer sleeve 31 is restricted by the second movable cavity 12, so that the embedded column 32 is lifted in the limiting groove 311 opened in the outer sleeve 31, so that the expansion part 321 of the embedded column 32 and the tightening part 312 of the outer sleeve 31 are out of contact with each other, and the diameter of the outer sleeve 31 becomes smaller, thereby completing the release of the boring of the compressor cylinder body; finally, the compressor cylinder body is released.

[0082] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0083] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A compressor cylinder bore positioning fixture, comprising a fixture mounting housing (1), a center hole fixing assembly (2), a bore positioning assembly (3) and a driving member (4), characterized in that: The bottom of the fixture mounting housing (1) is fixedly mounted on the top of the workbench (5); The fixture installation shell (1) has a first movable cavity (11) extending vertically therethrough, the center hole fixing component (2) is located in the first movable cavity (11), and the top of the center hole fixing component (2) passes through the fixture installation shell (1), and a second movable cavity (12) is provided on the side of the fixture installation shell (1), the boring hole positioning component (3) is located in the second movable cavity (12), and the top of the boring hole positioning component (3) passes through the fixture installation shell (1); The bottom of the compressor cylinder body is placed on the fixture mounting housing (1), and the center hole fixing component (2) is inserted into the center hole of the compressor cylinder body, and the boring hole positioning component (3) is inserted into the boring hole of the compressor cylinder body; The driving member (4) is fixedly mounted in the middle of the bottom surface of the workbench (5), and a transmission mechanism (6) is provided between the driving member (4) and the center hole fixing assembly (2), and a linkage mechanism (7) is provided between the center hole fixing assembly (2) and the boring hole positioning assembly (3).

2. A compressor cylinder boring positioning fixture according to claim 1, characterized in that: The center hole fixing assembly (2) comprises: a cone skirt outer cover (21) and a cone column (22); The bottom of the cone column (22) is fixedly connected to the bottom of the first movable cavity (11), and the cone skirt outer cover (21) is movably sleeved on the top of the cone column (22).

3. A compressor cylinder boring positioning fixture according to claim 2, characterized in that: The transmission mechanism (6) comprises: a connecting strip (61) and a connecting ring (62); The output end of the driving member (4) inserted into the first movable cavity (11) is fixedly connected to a connecting ring (62) via a connecting strip (61); the connecting ring (62) is movably sleeved on the cone column (22); and the top of the connecting ring (62) is fixedly connected to the bottom of the cone skirt outer cover (21).

4. A compressor cylinder boring positioning fixture according to claim 3, characterized in that: The boring positioning assembly (3) comprises: an outer sleeve (31) and an embedded column (32); The outer sleeve (31) is movably sleeved on the outer surface of the embedded column (32), and the bottom of the outer sleeve (31) is fixedly connected to the bottom of the second movable cavity (12) via an elastic reset member (8); A limit slot (311) is provided inside the outer sleeve (31), and an expansion portion (321) is fixedly installed on the top of the embedded column (32) that is inserted into the limit slot (311), and a tightening portion (312) is fixedly installed on the inner wall of the limit slot (311), the sum of the widths of the tightening portion (312) and the expansion portion (321) is greater than the width of the limit slot (311), and the tightening portion (312) is pressed and contacted with the expansion portion (321); The embedded column (32) is inserted into the side surface of the limiting slot (311) to fix a limiting convex ring (322), and the limiting convex ring (322) is clamped with the bottom of the limiting slot (311).

5. A compressor cylinder boring positioning fixture according to claim 4, characterized in that: The linkage mechanism (7) comprises: a gear rod (71), a first gear (72) and a second gear (73); The top of the gear rod (71) is fixedly mounted on the bottom of the embedded column (32); a rotation groove (13) is provided on the side wall of the first movable cavity (11); a rotation shaft (74) is rotatably connected in the rotation groove (13); the centers of the first gear (72) and the second gear (73) are fixedly sleeved on the rotation shaft (74); the gear rod (71) that penetrates from the second movable cavity (12) into the first movable cavity (11) is meshedly connected with the first gear (72); and a toothed portion (621) that meshes with the second gear (73) is provided on the side of the connecting ring (62); The radius of the first gear (72) is greater than the radius of the second gear (73).

6. A compressor cylinder boring positioning fixture according to claim 4, characterized in that: The outer sleeve (31) has at least one opening at its upper portion; and the cone skirt outer cover (21) has at least one opening at its top and side wall.

7. A compressor cylinder boring positioning fixture according to claim 4, characterized in that: The materials of the outer sleeve (31) and the cone skirt outer cover (21) are both spring steel with good elasticity.

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