Grinding machine tool for machining inner spherical surface

Abstract

The invention discloses a grinding machine tool for machining an inner spherical surface, and relates to the technical field of spherical workpiece grinding. A grinding assembly, a driving assembly and a driving motor are mounted on the top surface of the base; the grinding assembly comprises a spindle rotationally installed on the base, the front end of the spindle is connected with a tool apron, the rear end of the spindle is connected with the driving end of the driving motor, the middle of the tool apron is hinged to the spindle, a tool bit is installed at the front end of the tool apron, and an adjusting connecting rod is hinged to the rear end of the tool apron. A sleeve capable of sliding in the axial direction of the main shaft is arranged on the main shaft, the free end of the adjusting connecting rod is hinged to the sleeve, and a driving assembly for driving the annular groove to slide in a reciprocating mode along the main shaft is arranged on the base. According to the method, shutdown calculation and calibration are not needed, and the auxiliary time is greatly shortened; meanwhile, manual operation is replaced by mechanical transmission, personal errors and multiple clamping deviations are avoided, the problem of connection dislocation of segmented grinding is solved, and the inner spherical surface contour continuity and micron-order machining precision are guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of spherical workpiece grinding, in particular to a grinding machine for machining inner spherical surface. BACKGROUND

[0002] The inner spherical surface workpiece is a core component in the fields of aerospace, medical devices, hydraulic transmission, etc., such as artificial joints, hydraulic plunger pump cylinder bodies, etc., and the machining precision thereof directly affects the assembly precision and service life of the whole machine, and the requirements of modern industry for the surface roughness and profile of the inner spherical surface workpiece are increasingly stringent.

[0003] The current mainstream inner spherical surface grinding process adopts a segmented angle adjustment and multiple grinding mode: first, the target angle between the grinding wheel and the center line of the workpiece is calculated according to the curvature parameters of the workpiece, the tool angle is adjusted manually or mechanically and locked, and the equipment is started to complete local grinding at this angle; after the region meets the requirements, the angle is re-calculated, adjusted and ground again, and the above steps are repeated until the entire inner spherical surface is covered, and part of the process also needs to be calibrated by trial grinding with red powder, etc., to ensure smooth connection of the segmented regions.

[0004] The technical solution has the following defects: the core problem is that the machining efficiency is extremely low, and the multiple stoppage for angle adjustment, parameter calculation and trial grinding calibration occupies a large amount of auxiliary time, and the auxiliary time of some complex workpieces even exceeds the actual grinding time, which seriously restricts the batch production efficiency; secondly, the multiple angle adjustment is easy to introduce positioning errors and human operation errors, resulting in texture misalignment, stepped protrusions and other connection defects in the segmented regions, which affect the continuity of the spherical surface profile; in addition, the operation process is complicated, the skill requirement of the operator is high, and the equipment needs to be repeatedly debugged for different specifications of workpieces, which has poor universality and high adaptation cost.

[0005] Therefore, the present application is proposed. SUMMARY

[0006] The present application aims to provide a grinding machine for machining inner spherical surface to solve the problems in the background art.

[0007] To solve the above technical problems, the present application provides a grinding machine for machining inner spherical surface, which comprises: a base, a grinding assembly, a driving assembly and a driving motor are installed on the top surface of the base; The grinding assembly comprises a main shaft rotatably installed on the base, a tool holder connected to the front end of the main shaft, a driving end connected to the rear end of the main shaft, a tool head installed on the front end of the tool holder, and an adjusting connecting rod hingedly connected to the rear end of the tool holder; a sleeve capable of sliding along the axial direction of the main shaft is arranged on the main shaft, the free end of the adjusting connecting rod is hingedly connected to the sleeve, and a driving assembly capable of reciprocating along the main shaft is arranged on the driving ring groove of the base; The driving assembly comprises a swing rod rotatably installed on the base, a worm gear and a worm, the free end of the swing rod is movably connected with the sleeve, the worm gear is connected with the worm in meshing mode, the front end of the worm gear is provided with a rotating disc, the outer edge of the front end surface of the rotating disc is provided with a straight slot, a pin shaft is formed in the swing rod, and the straight slot is inserted into the pin shaft. The base is further provided with a transmission assembly for driving the worm to rotate.

[0008] Further, the main shaft is fixedly provided with a shaft sleeve, the sleeve is slidably connected with the shaft sleeve, the outer wall of the shaft sleeve is provided with a limiting key, and the inner wall of the sleeve is provided with a key groove matched with the sleeve.

[0009] Further, the top surface of the base is provided with a shaft seat, the worm gear is rotatably installed on the shaft seat, and the bottom end of the swing rod is rotatably installed on the shaft seat.

[0010] Further, an annular groove is formed in the outer wall of the sleeve, the inside of the annular groove is provided with an adjusting block, and the free end of the swing rod is rotatably connected with the adjusting block.

[0011] Further, the transmission assembly comprises a conical sleeve coaxially installed on the main shaft, a connecting shaft coaxially installed on the worm, a driven wheel installed on the connecting shaft, and a synchronous belt in transmission connection between the conical sleeve and the driven wheel.

[0012] Further, the base is provided with an adjusting member for driving the driven wheel to slide along the connecting shaft in the axial direction, the adjusting member comprises an adjusting screw rotatably installed on the base, a threaded seat threadedly connected with the adjusting screw, and the driven wheel is rotatably installed on the threaded seat.

[0013] Further, the top surface of the base is further provided with a tensioning roller for tensioning the synchronous belt, the base is symmetrically provided with a limiting frame, a sliding seat is slidably installed in the limiting frame, the tensioning roller is rotatably connected between two tensioning rollers, a tensioning spring is installed on the bottom surface of the sliding seat, and the bottom end of the tensioning spring is fixed with the base.

[0014] Further, the base comprises a bottom plate, a plurality of mounting slots are arranged on the bottom plate, a support plate is arranged on the bottom plate, a bearing plate is arranged above the support plate, the grinding assembly, the driving assembly and the driving motor are arranged on the bearing plate, a push cylinder is hingedly connected to the top surface of the support plate, the telescopic end of the push cylinder is hingedly connected to the bottom surface of the bearing plate, four support columns are symmetrically arranged on the top surface of the bottom plate, a lower sliding sleeve is arranged on the side wall of the support plate, the lower sliding sleeve is slidingly installed on the support column, a lower locking nut is threadedly connected to the support column for fixing the lower sliding sleeve, a connecting plate is arranged on the front end side wall of the bearing plate, an upper sliding sleeve is rotatably installed on the connecting plate, the upper sliding sleeve is slidingly installed on the support column, and an upper locking nut is threadedly connected to the support column for fixing the upper sliding sleeve.

[0015] Compared with the prior art, the beneficial effects of the present application are: The present application provides grinding power through the driving motor and the main shaft, and realizes real-time angle adjustment during the grinding process of the tool head through the integrated mechanical linkage structure of the conical sleeve, the synchronous belt, the worm gear, the swing rod, the sleeve and the adjusting connecting rod, without the need for shutdown calculation and calibration, greatly shortening the auxiliary time; at the same time, mechanical transmission replaces manual operation, avoiding human error and multiple clamping deviations, solving the connection misalignment problem of segmented grinding, and ensuring the continuity of the inner spherical surface profile and micron-level machining precision.

[0016] The present application can flexibly adjust the height and inclination angle of the bearing plate through the cooperation of the support columns of the base and the push cylinder, adapt to inner spherical workpieces of different sizes and installation attitudes; the adjusting screw and the automatic tensioning structure ensure stable synchronous belt transmission, adapt to different transmission needs and easy-to-damage part maintenance; simplify the operation process, reduce the dependence on the skills of the operator, and reduce downtime maintenance time. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a front view structural schematic diagram of the present application; Figure 2 It is a rear view structural schematic diagram of the present application; Figure 3 It is a side view structural schematic diagram of the present application; Figure 4 It is a structural schematic diagram of the base in the present application; Figure 5 It is a structural schematic diagram of the grinding assembly in the present application; Figure 6 It is a structural schematic diagram of the driving assembly in the present application; Figure 7 It is a structural schematic diagram of the driving assembly in the present application; Figure 8 It is a structural schematic diagram of the transmission assembly in the present application.

[0018] In the drawings: 100, base; 101, bottom plate; 102, mounting notch; 103, support plate; 104, lower sliding sleeve; 105, support column; 106, lower locking nut; 107, upper sliding sleeve; 108, upper locking nut; 109, connecting plate; 110, bearing plate; 111, push cylinder; 200, grinding assembly; 201, main shaft; 202, tool holder; 203, tool head; 204, adjusting link; 205, shaft sleeve; 206, limit key; 207, sleeve; 208, annular groove; 209, adjusting block; 300, drive assembly; 301, shaft seat; 302, swing rod; 303, worm gear; 304, worm; 305, turntable; 306, pin shaft; 307, straight notch; 400, drive motor; 500, transmission assembly; 501, conical sleeve; 502, connecting shaft; 503, driven wheel; 504, synchronous belt; 505, limit frame; 506, sliding seat; 507, tensioning roller; 508, tensioning spring; 509, adjusting screw; 510, threaded seat. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0020] Please refer to Figures 1-8 The present application provides a technical solution: a grinding machine for machining inner spherical surface, comprising; The base 100 has a grinding assembly 200, a drive assembly 300 and a drive motor 400 mounted on the top surface thereof; The grinding assembly 200 comprises a main shaft 201 rotatably mounted on the base 100, the front end of the main shaft 201 being connected with a tool holder 202, the rear end being connected with the driving end of the drive motor 400, the middle part of the tool holder 202 being hinged to the main shaft 201, the front end being mounted with a tool head 203, and the rear end being hinged with an adjusting link 204; the main shaft 201 is provided with a sleeve 207 capable of sliding along the axial direction thereof, the free end of the adjusting link 204 being hinged to the sleeve 207, and the base 100 is provided with a drive assembly 300 capable of driving the annular groove 208 to slide along the main shaft 201; The driving assembly 300 comprises a swing rod 302 rotatably installed on the base 100, a worm wheel 303 and a worm 304, the free end of the swing rod 302 is movably connected with the sleeve 207, the worm wheel 303 is meshingly connected with the worm 304, the front end of the worm wheel 303 is provided with a rotating disc 305, the outer edge of the front end surface of the rotating disc 305 is provided with a straight slot 307, the swing rod 302 is provided with a pin shaft 306, and the straight slot 307 is inserted into the inside of the pin shaft 306. The base 100 is further provided with a transmission assembly 500 for driving the worm 304 to rotate.

[0021] Specifically, the base 100 provides mounting references for the grinding assembly 200, the driving assembly 300, the driving motor 400 and the transmission assembly 500; after the driving motor 400 is started, the main shaft 201 is driven to rotate, the tool holder 202 hingedly connected with the front end of the main shaft 201 rotates synchronously with the main shaft 201, and the tool head 203 forms a basic grinding motion; at the same time, the transmission assembly 500 drives the worm 304 to rotate, the rotating disc 305 is driven to rotate through the meshing transmission of the worm wheel 303 and the worm 304, the straight slot 307 on the rotating disc 305 drives the swing rod 302 to swing back and forth around the hinge point through the pin shaft 306, the free end of the swing rod 302 drives the sleeve 207 to slide along the main shaft 201 in the axial direction, the sleeve 207 pushes and pulls the tool holder 202 through the adjusting connecting rod 204, so that the tool holder 202 swings back and forth around the middle hinge point, and finally the real-time angle adjustment of the tool head 203 in the grinding process is realized, and the full profile grinding of the inner spherical surface is completed in cooperation with the rotation of the main shaft.

[0022] The rotation of the main shaft is converted into the real-time angle swing of the tool head 203, the full curvature of the inner spherical surface can be covered without stopping, the auxiliary angle adjustment time is greatly shortened, and the machining efficiency is improved; the angle adjustment is realized through mechanical structure linkage, instead of manual adjustment, human operation errors and multiple clamping positioning errors are avoided, the problems such as connection misalignment and step protrusion in the segmented grinding in the background technology are solved, the continuity of the inner spherical surface profile and the surface quality are ensured; the personnel skills are not dependent on repeated calculation of angle parameters and trial grinding calibration, the problems such as complicated operation and high skill requirement in the background technology are solved.

[0023] As a technical optimization scheme of the present application, the shaft sleeve 205 is fixedly installed on the main shaft 201, the sleeve 207 is slidably connected with the shaft sleeve 205, the outer wall of the shaft sleeve 205 is provided with a limiting key 206, and the inner wall of the sleeve 207 is provided with a key groove matched with the sleeve 207.

[0024] Specifically, the shaft sleeve 205 fixed on the main shaft 201 provides sliding support for the sleeve 207, the limiting key 206 on the outer wall of the shaft sleeve 207 is in guided cooperation with the matching key groove on the inner wall of the sleeve 207, which limits the circumferential rotation of the sleeve 207 along the main shaft 201 and only allows it to slide smoothly in the axial direction; through the guiding and limiting of the limiting key 206 and the key groove, the circumferential deviation or jamming of the sleeve 207 during sliding is avoided, the axial sliding of the sleeve 207 is ensured to be accurately synchronized with the pushing and pulling action of the adjusting link 204, the problem of slight deviation in angle adjustment in the background art is solved, and the profile accuracy of the inner spherical surface is further improved.

[0025] As a technical optimization scheme of the present application, the top surface of the base 100 is provided with a shaft seat 301, and the worm gear 303 is rotatably installed on the shaft seat 301. The bottom end of the swing rod 302 is rotatably installed on the shaft seat 301.

[0026] Specifically, the shaft seat 301 on the top surface of the base 100 provides a unified rotating installation reference for the worm gear 303 and the swing rod 302: the worm gear 303 is rotatably installed on the shaft seat 301 to ensure stable meshing clearance with the worm 304; the bottom end of the swing rod 302 is hingedly connected to the shaft seat 301 to ensure that the swing rod 302 swings back and forth around the fixed pivot point and avoids deviation of the swing trajectory; the shaft seat 301 provides precise positioning for the worm gear 303 and the swing rod 302, reduces the meshing transmission clearance and swing trajectory deviation, and ensures that the rotational motion of the rotating disc 305 can be accurately converted into the axial sliding of the sleeve 207, thereby ensuring the accuracy of the angle adjustment of the tool bit 203 and solving the problem of insufficient angle adjustment accuracy in the background art.

[0027] As a technical optimization scheme of the present application, an annular groove 208 is formed on the outer wall of the sleeve 207, and an adjusting block 209 is arranged inside the annular groove 208. The free end of the swing rod 302 is rotatably connected to the adjusting block 209.

[0028] Specifically, the annular groove 208 on the outer wall of the sleeve 207 provides a space for the adjusting block 209 to move, and the free end of the swing rod 302 is rotatably connected to the adjusting block 209. When the swing rod 302 swings back and forth, the adjusting block 209 rotates adaptively in the annular groove 208, smoothly converting the swing motion of the swing rod into the axial sliding of the sleeve 207; the adjusting block 209 and the annular groove 208 are matched in a way that converts the rigid connection between the swing rod 302 and the sleeve 207 into flexible transmission, avoiding jamming or local stress concentration during sliding, and improving the continuity and smoothness of angle adjustment.

[0029] As a technical optimization scheme of the present application, the transmission assembly 500 includes a conical sleeve 501 coaxially installed on the main shaft 201, a connecting shaft 502 coaxially installed on the worm 304, a driven wheel 503 installed on the connecting shaft 502, and a synchronous belt 504 in transmission connection between the conical sleeve 501 and the driven wheel 503.

[0030] Specifically, the transmission structure adopted by the transmission assembly 500 is that the main shaft 201 rotates to drive the coaxially installed conical sleeve 501 to rotate synchronously, the power is transmitted to the driven wheel 503 on the worm 304 through the synchronous belt 504, the driven wheel 503 drives the worm 304 to rotate through the connecting shaft 502, and the synchronous linkage of the angle adjustment power and the grinding power is realized; the angle adjustment mechanism is driven by the rotation power of the main shaft 201, the equipment structure is simplified, the manufacturing cost is reduced, and the high cost problem of the complex servo system of the high-end numerical control equipment in the background art is avoided.

[0031] As a technical optimization scheme of the present application, the base 100 is provided with an adjusting part for driving the driven wheel 503 to slide axially along the connecting shaft 502, the adjusting part comprises an adjusting screw 509 rotatably installed on the base 100, and a threaded seat 510 is threadedly connected to the adjusting screw 509, and the driven wheel 503 is rotatably installed on the threaded seat 510.

[0032] Specifically, the adjusting screw 509 on the base 100 is in threaded cooperation with the threaded seat 510, when the adjusting screw 509 is rotated, the threaded seat 510 moves axially along the adjusting screw, drives the driven wheel 503 rotatably installed on the threaded seat 510 to slide axially along the connecting shaft 502, and then adjusts the center distance between the driven wheel 503 and the conical sleeve 501; by fine-tuning the position of the driven wheel 503, the tension of the synchronous belt 504 can be accurately adjusted, so as to avoid the synchronous belt from slipping due to being too loose or being worn out due to being too tight, and the poor adaptability of the transmission parts in the background art is solved.

[0033] As a technical optimization scheme of the present application, the base 100 is provided with a tensioning roller 507 for tensioning the synchronous belt 504, and a limiting frame 505 is symmetrically installed on the base 100, a sliding seat 506 is slidably installed in the limiting frame 505, the tensioning roller 507 is rotatably connected between the two tensioning rollers 507, a tensioning spring 508 is installed on the bottom surface of the sliding seat 506, and the bottom end of the tensioning spring 508 is fixed to the base 100.

[0034] Specifically, the limiting frame 505 on the base 100 provides sliding guidance for the sliding seat 506, and the tensioning spring 508 on the bottom surface of the sliding seat 506 always exerts an upward elastic force on the sliding seat 506 to push the tensioning roller 507 to compress the synchronous belt 504, when the synchronous belt 504 is loose, the tensioning spring 508 automatically compensates the tension through elastic expansion; the automatic tensioning structure avoids the loosening and slipping of the synchronous belt 504 due to wear and thermal expansion and contraction in long-term operation, ensures the continuity and accuracy of power transmission, reduces the angle adjustment error, and solves the problem of grinding precision fluctuation caused by unstable transmission in the background art.

[0035] As a technical optimization scheme of the application, the base 100 comprises a bottom plate 101, a plurality of mounting slots 102 are arranged on the bottom plate 101, a support plate 103 is arranged on the bottom plate 101, a bearing plate 110 is arranged above the support plate 103, the grinding assembly 200, the driving assembly 300 and the driving motor 400 are arranged on the bearing plate 110, the support plate 103 is further hinged with a push cylinder 111, the telescopic end of the push cylinder 111 is hinged with the bottom surface of the bearing plate 110, the top surface of the bottom plate 101 is symmetrically installed with four support columns 105, the side wall of the support plate 103 is provided with a lower sliding sleeve 104, the lower sliding sleeve 104 is slidingly installed on the support column 105, the lower locking nut 106 for fixing the lower sliding sleeve 104 is threadedly connected on the support column 105, the connecting plate 109 is installed on the front end side wall of the bearing plate 110, the upper sliding sleeve 107 is rotatably installed on the connecting plate 109, the upper sliding sleeve 107 is slidingly installed on the support column 105, and the upper locking nut 108 for fixing the upper sliding sleeve 107 is threadedly connected on the support column 105.

[0036] Specifically, the bottom plate 101 of the base 100 is fixed by the mounting slots 102; the support plate 103 slides along the support column 105 by the lower sliding sleeve 104, and the height is fixed by the lower locking nut 106; the bearing plate 110 adjusts the up-down position along the support column 105 by the upper sliding sleeve 107 on the connecting plate 109, the push cylinder 111 can fine-tune the inclination angle of the bearing plate 110, and after adjustment is completed, it is fixed by the upper locking nut 108, so as to realize the initial alignment of the tool head 203 and the workpiece; the height and inclination angle of the bearing plate 110 can be adjusted to adapt to different sizes and different installation attitudes of the inner spherical surface workpiece, and the problem of high cost of repeated replacement and debugging of equipment for different specifications of workpieces in the background art is solved.

[0037] The grinding machine tool realizes integrated operation of rotary grinding and real-time angle adjustment by a mechanical linkage structure, and the core cooperates with the grinding assembly 200, the driving assembly 300, the driving motor 400 and the transmission assembly 500 on the base 100, and the specific principle is as follows: Basic grinding power transmission: after the driving motor 400 is started, the main shaft 201 rotates around its axis, the tool holder 202 hinged with the front end of the main shaft 201 rotates synchronously with the main shaft, the tool head 203 on the tool holder 201 rotates at high speed, forming a basic grinding motion, and aligning the inner spherical surface of the workpiece to be machined for grinding operation; Real-time angle adjustment transmission path: when the main shaft 201 rotates, the coaxially installed conical sleeve 501 on the main shaft 201 drives the driven wheel 503 on the worm 304 to rotate through the synchronous belt 504, the synchronous belt 504 is kept in a tensioned state by the tensioning roller 507 cooperating with the tensioning spring 508, the adjusting screw 509 can fine-tune the position of the driven wheel 503 through the threaded seat 510 to adapt to the transmission demand, the driven wheel 503 drives the connecting shaft 502 and the worm 304 to rotate, the worm 304 meshes with the worm gear 303 to drive the worm gear 303 to rotate on the shaft seat 301, and then the front end of the rotating disc 305 is synchronously rotated; the straight slot 307 at the front end of the rotating disc 305 is inserted on the pin shaft 306 of the swing rod 302, and when the rotating disc 305 rotates, the straight slot 307 drives the swing rod 302 to reciprocating swing around the bottom hinge point of the shaft seat 301, the free end of the swing rod 302 is rotationally connected with the adjusting block 209 in the annular groove 208 of the sleeve 207, and the sleeve 207 slides along the axial direction of the main shaft 201 stably through the cooperation of the limiting key 206 on the shaft sleeve 205 and the key groove of the sleeve 207, when the sleeve 207 slides, the rear end hinged adjusting connecting rod 204 is pulled, because the middle part of the tool holder 202 is hinged with the main shaft 201, the push-pull force of the adjusting connecting rod 204 makes the tool holder 202 reciprocating swing around the hinge point, and then the tool head 203 changes the grinding angle in real time to accurately adapt to the change of the curvature of the inner spherical surface. The bottom plate 101 of the base 100 is fixed through the mounting slot 102, the supporting plate 103 slides along the support column 105 through the lower sliding sleeve 104, and the height is fixed by the lower locking nut 106; the supporting plate 110 adjusts the position along the support column 105 through the upper sliding sleeve 107 on the connecting plate 109, cooperates with the extension and retraction action of the push cylinder 111 to fine-tune the inclination angle of the supporting plate 110, is fixed through the upper locking nut 108, and ensures the initial alignment accuracy of the tool head 203 and the inner spherical surface of the workpiece. The whole machine realizes the grinding power output through the rotation of the main shaft, converts the rotation of the main shaft into the real-time angle swing of the tool head 203, completes the full profile grinding of the inner spherical surface without stopping, and solves the problems of low efficiency and large connection error in traditional segmented angle adjustment grinding.

[0038] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0039] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature described. The specification can include implicit combinations of explicitly mentioned features and / or explicit combinations of implicitely mentioned features. Each embodiment depends on the explicit combinations of features and / or the implicit combinations of features made specifically within that embodiment, and each such embodiment can be combined with every other such embodiment to create further embodiments.

Claims

1. A grinding machine for machining an inner spherical surface, characterized in that: The utility model provides a kind of grinding machine, including; Base (100), its top surface is equipped with grinding assembly (200), drive assembly (300) and drive motor (400); The grinding assembly (200) includes the main shaft (201) rotationally installed on the base (100), the main shaft (201) front end is connected with tool holder (202), rear end is connected with drive motor (400) drive end, the middle part of tool holder (202) is hinged with the main shaft (201), front end is equipped with tool bit (203), rear end is hinged with adjusting connecting rod (204);The sleeve (207) that can slide along the axis of the main shaft (201) is provided on the main shaft (201), the free end of the adjusting connecting rod (204) is hinged with the sleeve (207), the drive assembly (300) that the drive annular groove (208) reciprocatingly slides along the main shaft (201) is provided on the base (100); The drive assembly (300) includes the swing lever (302) rotationally installed on the base (100), worm gear (303) and worm (304), the free end of the swing lever (302) is movably connected with the sleeve (207), the worm gear (303) is meshed with the worm (304), the front end of the worm gear (303) is equipped with rotary disc (305), the outer edge of the front end surface of the rotary disc (305) is equipped with straight slot (307), the swing lever (302) is provided with pin shaft (306), and the straight slot (307) is inserted into the pin shaft (306) inside; The base (100) is also provided with a transmission assembly (500) for driving the worm (304) to rotate.

2. A grinding machine for machining an inner spherical surface as claimed in claim 1, characterized in that: The main shaft (201) is fixedly installed with a shaft sleeve (205), the sleeve (207) is slidably connected to the shaft sleeve (205), and the outer wall of the shaft sleeve (205) is provided with a limiting key (206), and the inner wall of the sleeve (207) is provided with a key groove matched with the sleeve (207).

3. A grinding machine for machining an inner spherical surface as claimed in claim 1, characterized in that: The top surface of the base (100) is provided with a shaft seat (301), the worm gear (303) is rotationally installed on the shaft seat (301), and the bottom end of the swing lever (302) is rotationally installed on the shaft seat (301).

4. A grinding machine for machining an inner spherical surface as claimed in claim 1, characterized in that: The outer wall of the sleeve (207) is provided with an annular groove (208), the inside of the annular groove (208) is provided with an adjusting block (209), and the free end of the swing lever (302) is rotationally connected to the adjusting block (209).

5. A grinding machine for machining an inner spherical surface as claimed in claim 1, characterized in that: The transmission assembly (500) includes a conical sleeve (501) coaxially installed on the main shaft (201), a connecting shaft (502) coaxially installed on the worm (304), a driven wheel (503) installed on the connecting shaft (502), and a synchronous belt (504) in transmission connection between the conical sleeve (501) and the driven wheel (503).

6. A grinding machine for machining an inner spherical surface as claimed in claim 5, characterized in that: The base (100) is provided with an adjusting member for driving the driven wheel (503) to slide along the connecting shaft (502) in the axial direction, the adjusting member includes an adjusting screw (509) rotationally installed on the base (100), a threaded seat (510) threadedly connected to the adjusting screw (509), and the driven wheel (503) is rotationally installed on the threaded seat (510).

7. A grinding machine for machining an inner spherical surface as claimed in claim 5, characterized in that: The base (100) top surface is further provided with a tensioning roller (507) of a tensioning synchronous belt (504), the base (100) is symmetrically provided with a limiting frame (505), the limiting frame (505) is slidably provided with a sliding seat (506), the tensioning roller (507) is rotatably connected between the two tensioning rollers (507), the sliding seat (506) is provided with a tensioning spring (508) at the bottom surface, and the tensioning spring (508) is fixed at the bottom end of the base (100).

8. A grinding machine for machining an inner spherical surface as claimed in claim 1, characterized in that: The base (100) comprises a bottom plate (101), a plurality of mounting notches (102) are arranged on the bottom plate (101), a supporting plate (103) is arranged on the bottom plate (101), a bearing plate (110) is arranged above the supporting plate (103), the grinding assembly (200), the driving assembly (300) and the driving motor (400) are arranged on the bearing plate (110), the supporting plate (103) is further hingedly provided with a push cylinder (111), the push cylinder (111) is hingedly connected to the bottom surface of the bearing plate (110), the bottom plate (101) is symmetrically provided with four supporting columns (105), a lower sliding sleeve (104) is arranged on the side wall of the supporting plate (103), the lower sliding sleeve (104) is slidably arranged on the supporting column (105), a lower locking nut (106) is threadedly connected to the supporting column (105) and used for fixing the lower sliding sleeve (104), a connecting plate (109) is arranged on the front end side wall of the bearing plate (110), an upper sliding sleeve (107) is rotatably arranged on the connecting plate (109), the upper sliding sleeve (107) is slidably arranged on the supporting column (105), and an upper locking nut (108) is threadedly connected to the supporting column (105) and used for fixing the upper sliding sleeve (107).

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