A machining and positioning device for an objective gear housing

Abstract

The application discloses a machining positioning device for an objective gear housing and relates to the technical field of clamping and positioning.The top of a support is provided with a placing groove for placing the objective gear housing.A main positioning mechanism penetrates a bottom positioning hole.A first side positioning mechanism penetrates a first side positioning hole and is connected with the main positioning mechanism.A second side positioning mechanism is arranged on the support and penetrates a second side positioning hole and is connected with the main positioning mechanism.The top arc surface of the arc-shaped groove is combined with the bottom outer arc surface of the objective gear housing to achieve preliminary positioning.The main positioning mechanism performs main positioning on the bottom of the objective gear housing.The first side positioning mechanism and the second side positioning mechanism perform symmetrical side positioning on the objective gear housing.The annular magnet block at one end of the positioning sleeve rod is magnetically connected with the annular electromagnet inside the positioning insertion groove.The annular magnet block at one end of the positioning sleeve rod is inserted into the positioning insertion groove of the positioning sleeve, thereby forming multidirectional positioning on the objective gear housing and improving the positioning precision and stability of the objective gear housing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of clamping positioning, in particular to a machining positioning device for an objective gear housing. BACKGROUND

[0002] The objective gear housing of a microscope is a core mechanical component of the microscope objective converter, and through multi-dimensional positioning reference, the machining precision of the gear housing itself is ensured.

[0003] In the actual use process of the prior art, since the existing clamps generally adopt a fixed rigid clamping mode, the workpiece is determined to be in place by manual visual observation or simple mechanical determination, it is difficult to determine whether the clamping is in place or whether micro-displacement occurs during the machining process, and the subsequent process reference is easily offset, and meanwhile, the objective gear housing has the characteristics of thin wall and soft material, the traditional rigid clamping force and the machining cutting force are superimposed, and indentation, deformation or even cracking is easily caused. SUMMARY

[0004] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art, and to provide a machining positioning device for an objective gear housing which improves positioning efficiency and positioning accuracy.

[0005] The technical scheme adopted to solve the above technical problem is that: a placing groove for placing the objective gear housing is processed on the top of the support, a bottom positioning hole is processed on the bottom of the objective gear housing, a main positioning mechanism for positioning the bottom of the objective gear housing is arranged on the support, the main positioning mechanism penetrates the bottom positioning hole, a first side positioning hole is processed on one side of the objective gear housing, a first side positioning mechanism for positioning one side of the objective gear housing is arranged on the support, the first side positioning mechanism penetrates the first side positioning hole and is connected with the main positioning mechanism, a second side positioning hole is processed on the other side of the objective gear housing, a second side positioning mechanism for positioning the other side of the objective gear housing is arranged on the support, the second side positioning mechanism penetrates the second side positioning hole and is connected with the main positioning mechanism; the structure of the first side positioning mechanism is the same as that of the second side positioning mechanism, the first side positioning mechanism is that: a first electric push rod is arranged on one side of the support, a first connecting rod is arranged at one end of the first electric push rod, a connecting sleeve penetrating the first side positioning hole is arranged at the top end of the first connecting rod, the connecting sleeve positions one side of the objective gear housing, a positioning sleeve rod is arranged on the connecting sleeve, and one end of the positioning sleeve rod is connected with the main positioning mechanism.

[0006] Further, the placing groove is an arc-shaped groove, and the top arc surface of the arc-shaped groove is attached to the bottom outer arc surface of the objective gear housing.

[0007] Further, the main positioning mechanism is that the support is internally processed with a groove, the groove is provided with a second electric push rod on one side, the second electric push rod is connected with the bottom of the main positioning plate on one end, a fixing shaft is arranged on the support, the fixing shaft is rotationally connected with the main positioning plate, the main positioning plate penetrates the bottom positioning hole of the objective lens gear housing and positions the bottom of the objective lens gear housing, and the side surface of the main positioning plate is in abutment with the inner side surface of the objective lens gear housing.

[0008] Further, the main positioning plate is provided with a positioning sleeve on the top, one side of the positioning sleeve is connected with one end of the positioning sleeve rod, and the other side of the positioning sleeve is connected with the second side positioning mechanism.

[0009] Further, the end, where the connecting sleeve is connected with the positioning sleeve rod, is provided with a positioning laser detector, the two sides of the positioning sleeve are respectively provided with reflecting targets, the positioning sleeve rod is a hollow sleeve rod, and the horizontal line where the positioning laser detector is located is the same horizontal line as the horizontal line where the reflecting targets are located.

[0010] Further, the two sides of the positioning sleeve are respectively processed with positioning insertion grooves, each positioning insertion groove is respectively provided with an annular electromagnet, one end, where the positioning sleeve rod is connected with the positioning sleeve, is provided with a first connecting assembly or a second connecting assembly, the first connecting assembly is that one end, where the positioning sleeve rod is connected with the positioning sleeve, is provided with an annular magnetic block, the annular magnetic block is magnetically connected with the annular electromagnet, and the annular magnetic block is inserted into the positioning insertion groove.

[0011] Further, the second connecting assembly is that one end, where the positioning sleeve rod is connected with the positioning sleeve, is provided with a connecting ring, the connecting ring is inserted into the positioning insertion groove, an internal passage is processed in the connecting ring in the circumferential direction, the internal passage is filled with hydraulic oil, a plurality of pressing blocks are uniformly arranged on the side surface of the connecting ring in the circumferential direction, each pressing block is magnetically repelled from the annular electromagnet, each pressing block is fixedly connected with a first piston through a second connecting rod, each first piston is slidably connected with the internal passage, a plurality of abutting blocks are uniformly arranged on the outer circumferential side wall of the connecting ring in the circumferential direction, the plurality of abutting blocks are in abutment with the circumferential inner side surface of the positioning insertion groove, and each first piston is fixedly connected with a second piston through a third connecting rod.

[0012] Further, the shape of each abutting block is a spherical segment, and the curved surface of the spherical segment is in abutment with the circumferential inner side surface of the positioning insertion groove.

[0013] Further, the outer diameter of each positioning sleeve rod is greater than the outer diameter of the connecting ring.

[0014] The beneficial effects of the present application are as follows: (1) the present application adopts the top arc surface of the arc-shaped groove to be combined with the bottom outside arc surface of the objective lens gear shell to realize preliminary positioning, the main positioning mechanism is used for main positioning of the bottom of the objective lens gear shell, the first side positioning mechanism and the second side positioning mechanism are used for symmetric side positioning of the objective lens gear shell, the annular magnetic block at one end of the positioning sleeve rod is magnetically connected with the annular electromagnet in the positioning slot, the annular magnetic block at one end of the positioning sleeve rod is inserted into the positioning slot of the positioning sleeve, and multi-directional positioning of the objective lens gear shell is formed, the machining error caused by the insufficient single positioning reference of the traditional single positioning reference is solved, and the positioning precision and stability of the objective lens gear shell are improved.

[0015] (2) the present application adopts the positioning laser detection to be matched with the corner cube prism reflection target, the positioning laser detector is used for detecting whether the positioning connecting sleeve is correctly installed, the detection reference is ensured to be stable, and the machining error of the objective lens gear shell is reduced.

[0016] (3) the present application adopts the connecting ring at one end of the positioning sleeve rod to be inserted into the inside of the positioning slot, a plurality of pressing blocks on the connecting ring are respectively magnetically repelled with the annular electromagnet to drive the contact blocks to extend out, the plurality of contact blocks are respectively in contact with the inner side surface of the circumference of the positioning slot, the fastening connection of the positioning sleeve rod and the positioning sleeve is facilitated, stress concentration of a single connection point is avoided, and deformation of the objective lens gear shell is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic diagram of one embodiment of the machining positioning device of the objective lens gear shell.

[0018] Figure 2 is Figure 1 a structural schematic diagram from another angle.

[0019] Figure 3 is a structural schematic diagram of the objective lens gear shell.

[0020] Figure 4 is Figure 3 a structural schematic diagram from another angle.

[0021] Figure 5 is a structural schematic diagram of the first side positioning mechanism, the main positioning mechanism and the second side positioning mechanism.

[0022] Figure 6 is a structural schematic diagram of the objective lens gear shell and the main positioning mechanism.

[0023] Figure 7 is an internal structural schematic diagram of the objective lens gear shell, the first side positioning mechanism and the main positioning mechanism.

[0024] Figure 8 is a structural schematic diagram of the first side positioning mechanism and the main positioning mechanism.

[0025] Figure 9 yes Figure 8 A structural diagram from another angle.

[0026] Figure 10 This is a structural diagram of the main positioning mechanism.

[0027] Figure 11 This is a schematic diagram of the structure of the first connecting component on the positioning sleeve rod.

[0028] Figure 12 This is a schematic diagram of the structure of the second connecting component on the positioning sleeve rod.

[0029] Figure 13 This is a schematic diagram of the internal structure of the connecting ring.

[0030] Reference numerals: 1. Objective lens gear housing; 2. First side positioning mechanism; 201. Positioning sleeve; 202. Connecting sleeve; 203. First connecting rod; 204. First electric push rod; 205. Positioning laser detector; 206. Annular magnetic block; 207. Connecting ring; 208. Abutting block; 209. Pressing block; 210. Second connecting rod; 211. First piston; 212. Third connecting rod; 213. Second piston; 214. Internal channel; 3. Support; 4. Main positioning mechanism; 401. Positioning sleeve; 402. Main positioning plate; 403. Second electric push rod; 404. Fixed shaft; 405. Reflective target; 406. Positioning slot; 5. Second side positioning mechanism; 6. First side positioning hole; 7. Bottom positioning hole; 8. Second side positioning hole; 9. Placement groove; 10. Groove. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0032] Example 1

[0033] like Figures 1 to 4 As shown, the objective lens gear housing processing and positioning device of this embodiment is composed of an objective lens gear housing 1, a first side positioning mechanism 2, a support 3, a main positioning mechanism 4, a second side positioning mechanism 5, a first side positioning hole 6, a bottom positioning hole 7, a second side positioning hole 8, a placement groove 9, and a groove 10 connected together.

[0034] The support 3 is provided with a placing groove 9 on the top for placing the objective gear shell 1, the placing groove 9 is an arc-shaped groove, and the top arc-shaped surface of the arc-shaped groove is in contact with the bottom outer arc-shaped surface of the objective gear shell 1. The bottom of the objective gear shell 1 is provided with a bottom positioning hole 7, the support 3 is provided with a main positioning mechanism 4 for positioning the bottom of the objective gear shell 1, the main positioning mechanism 4 penetrates the bottom positioning hole 7, one side of the objective gear shell 1 is provided with a first side positioning hole 6, the support 3 is provided with a first side positioning mechanism 2 for positioning one side of the objective gear shell 1, the first side positioning mechanism 2 penetrates the first side positioning hole 6 and is connected with the main positioning mechanism 4, the other side of the objective gear shell 1 is provided with a second side positioning hole 8, the support 3 is provided with a second side positioning mechanism 5 for positioning the other side of the objective gear shell 1, the second side positioning mechanism 5 penetrates the second side positioning hole 8 and is connected with the main positioning mechanism 4, and the first side positioning mechanism 2 and the second side positioning mechanism 5 symmetrically position the objective gear shell 1.

[0035] As shown in Figures 5 to 9 、 Figures 11 to 13 , the structure of the first side positioning mechanism 2 is the same as that of the second side positioning mechanism 5, and the first side positioning mechanism 2 is composed of a positioning sleeve rod 201, a connecting sleeve 202, a first connecting rod 203, a first electric push rod 204, a positioning laser detector 205, and an annular magnetic block 206.

[0036] The first side positioning mechanism 2 is that the support 3 is provided with the first electric push rod 204 on one side, the first electric push rod 204 is provided with the first connecting rod 203 at one end, the first connecting rod 203 is provided with the connecting sleeve 202 penetrating the first side positioning hole 6 at the top end, the connecting sleeve 202 positions one side of the objective gear shell 1, the connecting sleeve 202 is provided with the positioning sleeve rod 201, and one end of the positioning sleeve rod 201 is connected with the main positioning mechanism 4.

[0037] The end of the connecting sleeve 202 connected with the positioning sleeve rod 201 is provided with the positioning laser detector 205, the positioning sleeve rod 201 is provided with the reflecting target 405 on both sides, the positioning sleeve rod 201 is a hollow sleeve rod, the horizontal line where the positioning laser detector 205 is located is the same horizontal line as the horizontal line where the reflecting target 405 is located.

[0038] As shown in Figures 5 to 10 , the main positioning mechanism 4 is composed of a positioning sleeve 401, a main positioning plate 402, a second electric push rod 403, a fixed shaft 404, a reflecting target 405, and a positioning slot 406.

[0039] The main positioning mechanism 4 is that a recess 10 is processed inside the support 3, one side of the recess 10 is provided with a second electric push rod 403, one end of the second electric push rod 403 is connected with the bottom of a main positioning plate 402, a fixed shaft 404 is arranged on the support 3, the fixed shaft 404 is rotationally connected with the main positioning plate 402, the main positioning plate 402 penetrates through a bottom positioning hole 7 of the objective lens gear housing 1 and positions the bottom of the objective lens gear housing 1, one side surface of the main positioning plate 402 abuts against the inner side surface of the objective lens gear housing 1. A positioning sleeve 401 is arranged on the top of the main positioning plate 402, the positioning sleeve 401 abuts against the inner side surface of the objective lens gear housing 1, one end of the positioning sleeve 401 is connected with the positioning sleeve rod 201, the other end of the positioning sleeve 401 is connected with a second side positioning mechanism 5. Positioning insertion grooves 406 are respectively processed on the two sides of the positioning sleeve 401, an annular electromagnet is respectively arranged in each positioning insertion groove 406, and one end of the positioning sleeve rod 201 connected with the positioning sleeve 401 is provided with a first connecting assembly.

[0040] The first connecting assembly is that one end of the positioning sleeve rod 201 connected with the positioning sleeve 401 is provided with an annular magnetic block 206, the annular magnetic block 206 is magnetically connected with the annular electromagnet, and the annular magnetic block 206 is inserted into the positioning insertion groove 406.

[0041] The working principle of the embodiment 1 is as follows: the objective lens gear housing 1 is placed on the placing groove 9 of the support 3, the main positioning plate 402 penetrates through the bottom positioning hole 7 of the objective lens gear housing 1, the top arc surface of the arc-shaped groove of the placing groove 9 abuts against the bottom outer arc surface of the objective lens gear housing 1, the main positioning mechanism 4 penetrates through the bottom positioning hole 7 of the objective lens gear housing 1, the main positioning mechanism 4 positions the bottom of the objective lens gear housing 1, the first side positioning mechanism 2 penetrates through the first side positioning hole 6 of the objective lens gear housing 1 and is connected with the main positioning mechanism 4, the first side positioning mechanism 2 positions one side of the objective lens gear housing 1, and the second side positioning mechanism 5 penetrates through the second side positioning hole 8 of the objective lens gear housing 1 and is connected with the main positioning mechanism 4, the second side positioning mechanism 5 positions the other side of the objective lens gear housing 1.

[0042] The working principle of the main positioning mechanism 4 positioning the bottom of the objective lens gear housing 1 is that the second electric push rod 403 drives the main positioning plate 402 to rotate on the fixed shaft 404, the main positioning plate 402 and the positioning sleeve 401 are rotated to abut against the inner side wall of the bottom of the objective lens gear housing 1, and the bottom of the objective lens gear housing 1 is positioned.

[0043] The first side positioning mechanism 2 penetrates the first side positioning hole 6 of the objective lens gear housing 1 and is connected with the main positioning mechanism 4, and the working principle of the first side positioning mechanism 2 for positioning one side of the objective lens gear housing 1 is as follows: the first electric push rod 204 pushes the first connecting rod 203 to move, the connecting sleeve 202 at one end of the first connecting rod 203 and the positioning sleeve rod 201 enter the inside of the objective lens gear housing 1 through the first side positioning hole 6 of the objective lens gear housing 1, the connecting sleeve 202 is clamped in the first side positioning hole 6 of the objective lens gear housing 1, and the annular magnetic block 206 at one end of the positioning sleeve rod 201 is magnetically connected with the annular electromagnet in the positioning slot 406, the annular magnetic block 206 at one end of the positioning sleeve rod 201 is inserted into the positioning slot 406 of the positioning sleeve 401, and one side of the objective lens gear housing 1 can be positioned.

[0044] The laser beam emitted by the emission module of the positioning laser detector 205 is emitted to the reflection target 405, the reflection target 405 adopts an angle pyramid prism structure and has an automatic reflection characteristic, light path deviation caused by slight vibration or installation deviation can be effectively inhibited, reflected light returns along the original path, the receiving module of the positioning laser detector 205 receives the reflected light spot, and the positioning laser detector 205 is used for detecting whether the positioning connecting sleeve 202 is correctly installed. Meanwhile, in the machining process of the objective lens gear housing 1, the objective lens gear housing 1 is displaced or tilted due to cutting impact, thermal deformation or clamping looseness, the position of the reflected light spot detected by the positioning laser detector 205 will change, the first side positioning mechanism 2 needs to be positioned and installed again, and the positioning and machining efficiency of the objective lens gear housing 1 is improved.

[0045] The second side positioning mechanism 5 penetrates the second side positioning hole 8 of the objective lens gear housing 1 and is connected with the main positioning mechanism 4, the working principle of the second side positioning mechanism 5 for positioning the other side of the objective lens gear housing 1 is the same as that of the first side positioning mechanism 2 penetrating the first side positioning hole 6 of the objective lens gear housing 1 and being connected with the main positioning mechanism 4.

[0046] Embodiment 2

[0047] As shown in Figures 12 to 13 The one end of the positioning sleeve rod 201 connected with the positioning sleeve 401 is provided with a second connecting assembly, and the second connecting assembly is composed of a connecting ring 207, an abutting block 208, a pressing block 209, a second connecting rod 210, a first piston 211, a third connecting rod 212, a second piston 213 and an internal passage 214.

[0048] The second connecting assembly is that one end of the positioning sleeve rod 201 connected with the positioning sleeve 401 is provided with a connecting ring 207, and the outer diameter of the positioning sleeve rod 201 is greater than that of the connecting ring 207. The connecting ring 207 is inserted with the positioning slot 406, the inner part of the connecting ring 207 is processed with an internal passage 214 in the circumferential direction, the internal passage 214 is filled with hydraulic oil, the side of the connecting ring 207 is uniformly provided with a plurality of pressing blocks 209 in the circumferential direction, each pressing block 209 is respectively magnetically repelled with the annular electromagnet, each pressing block 209 is respectively fixedly connected with the first piston 211 through the second connecting rod 210, each first piston 211 is respectively slidably connected with the internal passage 214, the outer circumferential side wall of the connecting ring 207 is uniformly provided with a plurality of abutting blocks 208 in the circumferential direction, and the plurality of abutting blocks 208 are respectively abutted with the inner circumferential side of the positioning slot 406. Each first piston 211 is fixedly connected with the second piston 213 through the third connecting rod 212. The shape of the abutting block 208 is a spherical segment, and the curved surface of the spherical segment is abutted with the inner circumferential side of the positioning slot 406.

[0049] The other structures of the embodiment 2 are the same as those of the embodiment 1.

[0050] The working principle of the second connecting assembly in the embodiment 2 connected with the positioning sleeve 401 is that the connecting ring 207 at one end of the positioning sleeve rod 201 is inserted into the inner part of the positioning slot 406, the plurality of pressing blocks 209 on the connecting ring 207 are respectively magnetically repelled with the annular electromagnet, each pressing block 209 drives the first piston 211 to slide in the internal passage 214 through the second connecting rod 210, the hydraulic oil in the internal passage 214 pushes the second piston 213 to slide in the internal passage 214, the second piston 213 drives the abutting block 208 to extend out through the third connecting rod 212, and the plurality of abutting blocks 208 are respectively abutted with the inner circumferential side of the positioning slot 406, so that the positioning sleeve rod 201 is tightly connected with the positioning sleeve 401.

[0051] The above only describes the preferred embodiments of the present application and is not used to limit the protection scope of the present application.

Claims

1. A machining positioning device for an objective gear housing, characterized by: The top of the support (3) is provided with a placing groove (9) for placing the objective gear shell (1), the bottom of the objective gear shell (1) is provided with a bottom positioning hole (7), the support (3) is provided with a main positioning mechanism (4) for positioning the bottom of the objective gear shell (1), the main positioning mechanism (4) penetrates the bottom positioning hole (7), one side of the objective gear shell (1) is provided with a first side positioning hole (6), the support (3) is provided with a first side positioning mechanism (2) for positioning one side of the objective gear shell (1), the first side positioning mechanism (2) penetrates the first side positioning hole (6) and is connected with the main positioning mechanism (4), the other side of the objective gear shell (1) is provided with a second side positioning hole (8), the support (3) is provided with a second side positioning mechanism (5) for positioning the other side of the objective gear shell (1), the second side positioning mechanism (5) penetrates the second side positioning hole (8) and is connected with the main positioning mechanism (4). The first side positioning mechanism (2) and the second side positioning mechanism (5) have the same structure, the first side positioning mechanism (2) comprises a first electric push rod (204) arranged on one side of the support (3), one end of the first electric push rod (204) is provided with a first connecting rod (203), the top end of the first connecting rod (203) is provided with a connecting sleeve (202) penetrating the first side positioning hole (6), the connecting sleeve (202) positions one side of the objective gear shell (1), the connecting sleeve (202) is provided with a positioning sleeve rod (201), one end of the positioning sleeve rod (201) is connected with the main positioning mechanism (4). The main positioning mechanism (4) comprises a main positioning plate (402), the top of the main positioning plate (402) is provided with a positioning sleeve (401), one side of the positioning sleeve (401) is connected with one end of the positioning sleeve rod (201), the other side of the positioning sleeve (401) is connected with the second side positioning mechanism (5). One end of the connecting sleeve (202) and the positioning sleeve rod (201) is provided with a positioning laser detector (205), the two sides of the positioning sleeve (401) are respectively provided with a reflection target (405), the positioning sleeve rod (201) is a hollow sleeve rod, the horizontal line where the positioning laser detector (205) is located and the horizontal line where the reflection target (405) is located are the same horizontal line.

2. The machining positioning device for an objective gear housing according to claim 1, characterized in that: The placing groove (9) is an arc-shaped groove, the top arc surface of the arc-shaped groove is attached to the bottom outer arc surface of the objective gear shell (1).

3. The machining positioning device of an objective gear housing according to claim 1, characterized in that The main positioning mechanism (4) comprises a recess (10) formed in the support (3), one side of the recess (10) is provided with a second electric push rod (403), one end of the second electric push rod (403) is connected with the bottom of the main positioning plate (402), the support (3) is provided with a fixed shaft (404), the fixed shaft (404) is rotationally connected with the main positioning plate (402), the main positioning plate (402) penetrates the bottom positioning hole (7) of the objective gear shell (1) and positions the bottom of the objective gear shell (1), one side surface of the main positioning plate (402) abuts against the inner side surface of the objective gear shell (1).

4. The machining positioning device of an objective gear housing according to claim 1, characterized in that: The positioning sleeve (401) is provided with positioning slots (406) on both sides, and each positioning slot (406) is provided with an annular electromagnet; one end of the positioning sleeve rod (201) connected with the positioning sleeve (401) is provided with a first connecting assembly or a second connecting assembly.

5. The machining positioning device for an objective gear housing according to claim 4, characterized in that: The first connecting assembly is that one end of the positioning sleeve rod (201) connected with the positioning sleeve (401) is provided with an annular magnetic block (206), the annular magnetic block (206) is magnetically connected with the annular electromagnet, and the annular magnetic block (206) is inserted into the positioning slot (406).

6. The machining positioning device of an objective gear housing according to claim 5, characterized in that: The second connecting assembly is that one end of the positioning sleeve rod (201) connected with the positioning sleeve (401) is provided with a connecting ring (207), the connecting ring (207) is inserted into the positioning slot (406), the inside of the connecting ring (207) is provided with an internal passage (214) in the circumferential direction, the internal passage (214) is filled with hydraulic oil, the side of the connecting ring (207) is uniformly provided with a plurality of pressing blocks (209) in the circumferential direction, each pressing block (209) is magnetically repelled with the annular electromagnet, each pressing block (209) is fixedly connected with a first piston (211) through a second connecting rod (210), each first piston (211) is slidably connected with the internal passage (214), and the outer circumferential side wall of the connecting ring (207) is uniformly provided with a plurality of abutting blocks (208) in the circumferential direction, the plurality of abutting blocks (208) are abutted with the inner circumferential side of the positioning slot (406), and each first piston (211) is fixedly connected with a second piston (213) through a third connecting rod (212).

7. The machining positioning device of an objective gear housing according to claim 5, characterized in that: The shape of each abutting block (208) is a spherical segment, and the curved surface of the spherical segment is abutted with the inner circumferential side of the positioning slot (406). The outer diameter of each positioning sleeve rod (201) is greater than the outer diameter of the connecting ring (207).

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