Adjustable ball grinding machine

Abstract

The invention relates to the technical field of cable machining, in particular to an adjustable sphere grinding machine which comprises a supporting mechanism and a grinding mechanism, the supporting mechanism is used for supporting and fixing a spherical workpiece and driving the spherical workpiece to rotate, and the grinding mechanism is used for grinding the peripheral face of the spherical workpiece. The device further comprises a rotation driving source and a supporting seat, the rotation driving source is used for driving the supporting seat to rotate, and the supporting mechanism is arranged on the supporting seat in a sliding mode in the axial direction of the spherical workpiece. The synergistic effect of the supporting mechanism and the grinding mechanism can meet the grinding requirements of spherical workpieces of different sizes, the universality of the equipment is remarkably improved, and the problem that the equipment is frequently replaced due to the size change of the workpieces is solved.

Description

Technical Field

[0001] The present application relates to the field of sphere grinding, and in particular to an adjustable sphere grinding machine. Background Art

[0002] A sphere grinding machine is a high-precision device specifically used for processing spherical workpieces (such as bearing balls, valve spheres, spheres of precision instruments, etc.). The size accuracy, roundness, and surface finish of the sphere are achieved through the grinding process.

[0003] In the prior art, a sphere grinding machine includes a support mechanism and a grinding mechanism. The support mechanism is used to support and limit the sphere and drive the sphere to rotate. The grinding mechanism includes a grinding drive source and a grinding disc. The grinding drive source is used to drive the grinding disc to rotate, and the grinding disc is used to grind the outer peripheral surface of the sphere. However, the existing sphere grinding machine is only applicable to spherical workpieces of one size. For spherical workpieces of different sizes, different sphere grinding machines need to be replaced, and the applicability of the sphere grinding machine is relatively low. Summary of the Invention

[0004] In order to improve the applicability of the sphere grinding machine, the present application provides an adjustable sphere grinding machine.

[0005] An adjustable sphere grinding machine provided by the present application adopts the following technical solutions: An adjustable sphere grinding machine includes a support mechanism and a grinding mechanism. The support mechanism is used to support and fix the spherical workpiece and drive the spherical workpiece to rotate. The grinding mechanism is used to grind the outer peripheral surface of the spherical workpiece. It further includes a rotation drive source and a support base. The rotation drive source is used to drive the support base to rotate, and the support mechanism is slidably arranged on the support base along the axial direction of the spherical workpiece.

[0006] By adopting the above technical solutions, by setting a rotation drive source to drive the support base to rotate and cooperating with the slidably arranged support mechanism, multi-degree-of-freedom adjustment during the rotation of the spherical workpiece is achieved. The synergistic effect of the support mechanism and the grinding mechanism can meet the grinding requirements of spherical workpieces of different sizes, significantly improving the versatility of the equipment and avoiding the problem of frequently replacing the equipment due to changes in workpiece size.

[0007] Optionally, it further includes a sliding drive source and a sliding seat. The support mechanism is arranged on the sliding seat. The support mechanism includes a rotation drive source and an expansion assembly. The rotation drive source is used to drive the expansion assembly to rotate, and the expansion assembly is used to abut and support the inner surface of the spherical workpiece. A slide rail is arranged on the sliding seat, and a chute for the slide rail to insert and slide is opened on the support base. The sliding drive source is used to drive the sliding seat to slide on the support base.

[0008] By adopting the above technical solution, the sliding seat is driven to slide along the slide groove of the support seat by a sliding drive source, and combined with the resistance support of the expansion component on the inner surface of the spherical workpiece, the workpiece can not only rotate stably during the grinding process, but also flexibly adjust the support position according to the size change, thereby improving the grinding accuracy and workpiece clamping efficiency.

[0009] Optionally, the support mechanism further includes an adjusting driving source and an auxiliary supporting component, wherein the auxiliary supporting component is used to contact the expansion component, the auxiliary supporting component is slidably disposed on a sliding seat, and the adjusting driving source is used to drive the auxiliary supporting component to move.

[0010] By adopting the above technical solution, the driving source is adjusted to drive the auxiliary support assembly to move, and the support assembly contacts the expansion assembly, thereby improving the support stability of the expansion assembly, further enhancing the uniform support force on the inner wall of the workpiece, preventing the workpiece from shifting or deforming due to uneven force during the grinding process, and ensuring high-precision grinding effects.

[0011] Optionally, the expansion assembly includes an expansion drive structure and multiple groups of support rods, the multiple groups of support rods are arranged around the central axis of the spherical workpiece, the support rods are extended and retracted along the radial direction of the spherical workpiece, and the expansion drive structure is used to drive the support rods to extend and retract.

[0012] By adopting the above technical solution, the expansion drive structure drives multiple groups of radially retractable support rods to resist the inner wall of the workpiece. The arrangement design of the support rods makes the workpiece evenly stressed, avoiding surface damage caused by local stress concentration, and is suitable for spherical workpieces with different inner diameters.

[0013] Optionally, the expansion drive structure includes a sliding rod, which is arranged on a rotating drive source for sliding along the axial direction of the spherical workpiece. A driving bevel is formed on the outer peripheral surface of the sliding rod. The distance between the driving bevel and the central axis of the spherical workpiece decreases along the moving direction of the sliding rod. The driving bevel is used to interfere with the support rod.

[0014] By adopting the above technical solution, the driving inclined surface of the sliding rod cooperates with the support rod, and the synchronous radial expansion and contraction of the support rod is realized through axial movement, which simplifies the driving structure, improves the linear control accuracy of the adjustment, and ensures that the expansion and contraction amount of the expansion component is accurately matched with the workpiece size.

[0015] Optionally, the expansion drive structure also includes a handwheel and a rotating block arranged on the handwheel, the handwheel is rotatable around the central axis of the spherical workpiece and is arranged on the rotary drive source, a threaded hole is opened on the rotating block, and the sliding rod is threadedly connected to the rotating block.

[0016] By adopting the above technical solution, the threaded connection design between the handwheel and the rotating block enables the operator to precisely adjust the axial position of the sliding rod by manually rotating the handwheel, achieving a stepless adjustment function, taking into account both operation convenience and adjustment accuracy, without the need to set a driving source, and saving energy consumption.

[0017] Optionally, the rotary driving source is a driving motor. A plurality of sliding grooves are formed on the outer peripheral surface of the output shaft of the driving motor. The plurality of sliding grooves are distributed around the rotation axis of the output shaft of the driving motor. A locking block is slidably arranged in the sliding groove. A locking elastic member is connected between the locking block and the bottom wall of the sliding groove. The locking elastic member is used to drive the locking block to pop out of the sliding groove. A locking hole for the locking block to insert is formed on the handwheel. A recovery inclined surface is formed on the locking block. The hole wall of the locking hole is used to slidably abut against the recovery inclined surface to press the locking block back into the sliding groove.

[0018] By adopting the above technical solution, the cooperation between the sliding groove, the locking block and the locking elastic member on the output shaft of the driving motor and the locking hole of the handwheel realizes the quick locking and unlocking of the handwheel and the output shaft of the driving motor, which is convenient for quickly fixing the position of the handwheel before the equipment runs, preventing the handwheel from accidentally rotating during the grinding process, and improving the safety of the equipment.

[0019] Optionally, it further includes an unlocking ring. The unlocking ring is rotatably arranged on the output shaft of the driving motor. The unlocking ring is located on one side of the handwheel close to the rotation axis of the output shaft of the driving motor. A plurality of jacks corresponding to the locking blocks one by one are formed on the unlocking ring. The jacks are used for the locking blocks to insert. An installation groove is formed on the outer peripheral surface of the output shaft of the driving motor. A clamping block is slidably arranged in the installation groove. A locking elastic member is connected between the clamping block and the bottom wall of the installation groove. The locking elastic member is used to drive the clamping block to pop out of the installation groove. A locking hole and an unlocking hole for the clamping block to insert are formed on the unlocking ring. The locking hole and the unlocking hole are distributed around the central axis of the unlocking ring. When the clamping block inserts into the locking hole, the locking block inserts into the jack. When the clamping block inserts into the unlocking hole, the locking block exits the jack and is pressed back into the sliding groove by the inner wall surface of the unlocking ring.

[0020] By adopting the above technical solution, the cooperation design of the unlocking ring with the clamping block and the locking hole enables the insertion or withdrawal operation of the locking block to be completed with one key by rotating the unlocking ring to switch the position of the clamping block. When machining a spherical workpiece, the clamping block inserts into the locking hole, and the handwheel rotates forward to ensure the stable support of the inner part of the spherical workpiece by the support rod. After the machining of the spherical workpiece is completed, when the handwheel needs to rotate reversely to drive the support rod to contract, at this time, press the clamping block to make the clamping block exit the locking hole, and rotate the unlocking ring to insert the clamping block into the unlocking hole. The unlocking ring presses the locking block back into the sliding groove, and the handwheel can rotate reversely smoothly, improving the operation convenience.

[0021] Optionally, a support block is provided at the end of the support rod, and a buffer elastic member is connected between the support block and the support rod. The buffer elastic member is used to drive the support block to press against the inner wall of the spherical workpiece.

[0022] By adopting the above technical solution, the buffer elastic member at the end of the support rod provides a flexible buffer force for the support block, enabling the support block to automatically adapt to minor deformations when contacting the inner wall of the workpiece, reducing the risk of scratching the workpiece surface caused by rigid impact, and at the same time ensuring uniform distribution of the supporting force.

[0023] Optionally, an elastic buffer pad is provided at the end of the support block away from the support rod.

[0024] By adopting the above technical solution, the elastic buffer pad at the end of the support block further absorbs the vibration during the grinding process, reduces the friction noise between the workpiece and the support mechanism, and prevents indentations on the inner wall of the workpiece caused by direct contact with hard materials, improving the surface finish of the finished product.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The synergistic effect of the support mechanism and the grinding mechanism can meet the grinding requirements of spherical workpieces of different sizes, significantly improving the versatility of the equipment and avoiding the problem of frequent equipment replacement due to changes in workpiece size; 2. The threaded connection design of the handwheel and the rotating block realizes the stepless adjustment function, taking into account both the operation convenience and the adjustment accuracy, without the need to set a drive source, saving energy consumption; 3. The design of the unlocking ring enables the handwheel to rotate reversely smoothly, improving the operation convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of Embodiment 1 of the present application.

[0027] Figure 2 is a schematic structural diagram of Embodiment 1 of the present application highlighting the rotational drive source.

[0028] Figure 3 is a schematic structural diagram of Embodiment 2 of the present application highlighting the expansion assembly.

[0029] Figure 4 is Figure 3 the enlarged view at A in

[0030] Figure 5 is a cross-sectional view of the handwheel, unlocking ring and output shaft of the drive motor in Embodiment 2 of the present application.

[0031] Figure 6 is a cross-sectional view of the unlocking ring and the output shaft of the drive motor in Embodiment 2 of the present application.

[0032] Figure 7It is a top view of the drive motor and the unlocking ring in Embodiment 2 of the present application.

[0033] Figure 8 It is a cross-sectional view of the sliding rod and the extension rod in Embodiment 2 of the present application.

[0034] Description of reference numerals: 1, support mechanism; 11, rotation drive source; 111, drive motor; 112, sliding groove; 113, mounting groove; 12, expansion assembly; 121, expansion drive structure; 122, support rod; 123, sliding rod; 124, drive slope; 125, handwheel; 126, rotating block; 127, locking hole; 128, guiding groove; 13, adjustment drive source; 14, auxiliary support assembly; 141, rotating motor; 142, ejector rod; 2, grinding mechanism; 3, rotation drive source; 4, support seat; 41, sliding groove; 5, sliding drive source; 6, sliding seat; 61, sliding rail; 7, lock block; 71, recovery slope; 8, locking elastic member; 9, unlocking ring; 91, jack; 92, lock hole; 93, unlocking hole; 100, clamping block; 101, locking elastic member; 102, support block; 103, buffer elastic member; 104, buffer pad; 105, base; 106, extension rod; 107, guiding block; 108, connecting plate; 109, sleeve; 110, reset elastic member. Detailed implementation manners

[0035] The following will further describe the present application in detail with reference to the Figure 1-8 accompanying drawings.

[0036] Embodiment 1: Embodiment 1 of the present application discloses an adjustable spherical grinding machine. Referring to Figure 1 , the adjustable spherical grinding machine includes a support mechanism 1 and a grinding mechanism 2. The support mechanism 1 is used to support and fix a spherical workpiece and drive the spherical workpiece to rotate. The grinding mechanism 2 is used to grind the outer peripheral surface of the spherical workpiece. The support mechanism 1 can rotate relative to the grinding mechanism 2, and the support mechanism 1 can also move relative to the grinding mechanism 2.

[0037] Referring to Figure 1 and Figure 2 , the adjustable spherical grinding machine further includes a base 105, a rotation drive source 3 and a support seat 4. The rotation drive source 3 is arranged in the inner cavity of the base 105. The support seat 4 is rotatably mounted on the base 105 through a bearing assembly, and the base 105 rotatably supports the support seat 4. The rotation drive source 3 is a motor, and the output shaft of the rotation drive source 3 is fixedly connected to the support seat 4. The rotation drive source 3 is used to drive the support seat 4 to rotate.

[0038] Referring to Figure 2, the adjustable spherical grinding machine further includes a sliding drive source 5 and a sliding seat 6. The sliding drive source 5 is used to drive the sliding seat 6 to slide on the support seat 4, and the support mechanism 1 is fixedly installed on the sliding seat 6. Two slide rails 61 are fixedly installed on the bottom surface of the sliding seat 6, and two slide grooves 41 corresponding to the slide rails 61 one by one are formed on the upper surface of the support seat 4. The slide rails 61 are slidably installed in the slide grooves 41, and both the slide grooves 41 and the slide rails 61 extend along the direction parallel to the axial direction of the spherical workpiece. The sliding drive source 5 is fixedly installed on the support seat 4. The sliding drive source 5 is a cylinder, and the drive shaft of the sliding drive source 5 is fixedly connected to the sliding seat 6.

[0039] Referring to Figure 2 , the support mechanism 1 includes a rotation drive source 11 and an expansion assembly 12. The rotation drive source 11 is fixedly installed on the sliding seat 6. The rotation drive source 11 is a motor, and the expansion assembly 12 is fixedly connected to the output shaft of the rotation drive source 11. The expansion assembly 12 is used to expand and contract to limit and support the inner wall of the spherical workpiece, so as to drive the spherical workpiece to move.

[0040] Referring to Figure 2 , the support mechanism 1 further includes an adjustment drive source 13 and an auxiliary support assembly 14. The auxiliary support assembly 14 is slidably installed on the sliding seat 6, and the adjustment drive source 13 is used to drive the auxiliary support assembly 14 to slide. The auxiliary support assembly 14 includes a rotation motor 141 and a top rod 142. The adjustment drive source 13 is a cylinder, and the drive shaft of the adjustment drive source 13 is fixedly connected to the motor base of the rotation motor 141. The top rod 142 is fixedly connected to the output shaft of the rotation motor 141, and the rotation motor 141 drives the top rod 142 to rotate. The end of the top rod 142 away from the rotation motor 141 abuts against the expansion assembly 12.

[0041] In other embodiments, a lead screw nut mechanism can be used to drive the expansion assembly 12 and the auxiliary support assembly 14 to move synchronously.

[0042] The implementation principle of an adjustable spherical grinding machine according to an embodiment of the present application is as follows: First, start the expansion assembly 12 to limit and fix the inner wall of the spherical workpiece, then start the sliding drive source 5 to drive the sliding seat 6 to move, move the spherical workpiece to a position aligned with the grinding mechanism 2, start the adjustment drive source 13 to drive the auxiliary support assembly 14 to move until the top rod 142 abuts against the expansion assembly 12. Start the rotation drive source 11 and the rotation motor 141 to drive the spherical workpiece to rotate, and then start the grinding mechanism 2 to grind the spherical workpiece. While grinding, start the rotation drive source 3 to drive the spherical workpiece to rotate to ensure that the outer peripheral surface of the spherical workpiece can be fully and evenly ground.

[0043] In this embodiment, by setting a rotation driving source 3 to drive the support base 4 to rotate and cooperating with the slidably arranged support mechanism 1, multi-degree-of-freedom adjustment of the spherical workpiece during rotation is achieved. The synergistic effect of the support mechanism 1 and the grinding mechanism 2 can meet the grinding requirements of spherical workpieces of different sizes, significantly improving the versatility of the equipment and avoiding the problem of frequently replacing the equipment due to changes in the workpiece size.

[0044] Embodiment 2: Referring to Figure 3 , different from Embodiment 1, in this embodiment, the expansion assembly 12 includes an expansion driving structure 121 and multiple groups of support rods 122. The expansion driving structure 121 is used to drive the support rods 122 to expand and contract. There are three groups of support rods 122 arranged around the central axis of the spherical workpiece, and the support rods 122 extend radially along the spherical workpiece and expand and contract.

[0045] Referring to Figure 3 And Figure 4 , the rotation driving source 11 is a driving motor 111. The expansion driving structure 121 includes a handwheel 125, a rotating block 126 and a sliding rod 123. The handwheel 125 is rotatably installed on the output shaft of the driving motor 111, and the sliding rod 123 is slidably installed on the output shaft of the driving motor 111. The handwheel 125 is fixedly connected to the rotating block 126. A threaded hole extending along the axial direction of the output shaft of the driving motor 111 is formed in the rotating block 126, and the sliding rod 123 is threadedly connected to the rotating block 126 and slidably installed in the threaded hole of the rotating block 126.

[0046] Referring to Figure 5 , a plurality of sliding grooves 112 are formed on the outer peripheral surface of the output shaft of the driving motor 111. The plurality of sliding grooves 112 are arranged around the axial direction of the output shaft of the driving motor 111. A locking block 7 is slidably installed in the sliding groove 112, and a locking elastic member 8 is press-fitted between the locking block 7 and the bottom wall of the sliding groove 112. The locking elastic member 8 expands and contracts along the direction of ejecting the locking block 7 out of the sliding groove 112.

[0047] Referring to Figure 5 , a locking hole 127 for inserting the locking block 7 is formed through the handwheel 125. A recovery inclined surface 71 is formed at the end of the locking block 7, and the hole wall of the locking hole 127 is used to slidably abut against the recovery inclined surface 71 to press the locking block 7 back into the sliding groove 112. For example, when the handwheel 125 rotates clockwise as positive rotation, the recovery inclined surface 71 is inclined more towards the right as it is farther away from the bottom wall of the sliding groove 112.

[0048] Referring to Figure 5, the adjustable sphere grinding machine further includes an unlocking ring 9 which is rotatably mounted on the output shaft of the driving motor 111, and the unlocking ring 9 is radially located between the output shaft of the driving motor 111 and the handwheel 125. A plurality of jacks 91 corresponding to the lock blocks 7 one by one are formed through the unlocking ring 9, and the lock blocks 7 are inserted and passed through the jacks 91.

[0049] Refer to Figure 6 , an installation groove 113 is formed on the outer peripheral surface of the output shaft of the driving motor 111, a clamping block 100 is slidably mounted in the installation groove 113, and a locking elastic member 101 is press-fitted between the clamping block 100 and the bottom wall of the installation groove 113. The locking elastic member 101 expands and contracts along the direction of ejecting the clamping block 100 out of the installation groove 113. A locking hole 92 and an unlocking hole 93 for the clamping block 100 to insert are formed on the unlocking ring 9, and the locking hole 92 and the unlocking hole 93 are arranged around the central axis of the unlocking ring 9.

[0050] Refer to Figure 5 and Figure 6 and Figure 7 , it is assumed that the clockwise rotation of the handwheel 125 is the forward rotation, and the arrangement direction of the unlocking hole 93 and the locking hole 92 is clockwise. The sum of the width and the spacing between the unlocking hole 93 and the locking hole 92 is less than or equal to the width of the locking hole 127 and the sum of the spacing between the locking hole 127 and the adjacent locking hole 127. When the clamping block 100 is inserted into the locking hole 92, the lock block 7 is inserted into the jack 91. When the clamping block 100 is inserted into the unlocking hole 93, the lock block 7 exits the jack 91 and is pressed back into the sliding groove 112 by the inner wall surface of the unlocking ring 9.

[0051] Refer to Figure 4 and Figure 8 , an extension rod 106 is fixedly connected to the output shaft of the driving motor 111, and the sliding rod 123 is sleeved on the extension rod 106. A guiding block 107 is integrally formed on the extension rod 106, and a guiding groove 128 extending along the axial direction of the output shaft of the driving motor 111 is formed on the inner wall of the sliding rod 123. The guiding block 107 is inserted into the guiding groove 128 to guide the sliding of the sliding rod 123 and prevent the sliding rod 123 from rotating. The rotation of the handwheel 125 drives the rotation block 126 to rotate, thereby driving the sliding rod 123 to slide.

[0052] In other embodiments, the handwheel 125 and the rotation block 126 may not be provided, and the sliding rod 123 can be driven to move by an electric push rod, a cylinder or an oil cylinder.

[0053] Refer to Figure 4, a driving inclined surface 124 is formed on the outer peripheral surface of the sliding rod 123. The distance between the driving inclined surface 124 and the central axis of the output shaft of the driving motor 111 decreases along the moving direction of the sliding rod 123. The driving inclined surface 124 is used to abut against the support rod 122. In this embodiment, the end of the sliding rod 123 away from the output shaft of the driving motor 111 is frustum-shaped, and the driving inclined surface 124 is formed on the outer surface of this end.

[0054] Refer to Figure 4 , a connecting disk 108 is fixedly connected to the end of the extension rod 106 away from the output shaft of the driving motor 111. A plurality of sleeves 109 corresponding to the support rods 122 one by one are fixedly connected to the connecting disk 108. The sleeves 109 are sleeved on the support rods 122, and the support rods 122 are slidably installed in the sleeves 109. A reset elastic member 110 is connected between the support rod 122 and the sleeve 109. The reset elastic member 110 is used to drive the support rod 122 to reset to the contracted state, so that the support rod 122 is separated from the inner wall of the spherical workpiece. The length of the support rod 122 is adjustable, so as to be applicable to spherical workpieces of different sizes.

[0055] Refer to Figure 4 , a support block 102 is connected to the end of the support rod 122 away from the sliding rod 123. A buffer elastic member 103 is connected between the support block 102 and the support rod 122. The buffer elastic member 103 is a compression spring. The buffer elastic member 103 is used to drive the support block 102 to abut against the inner wall of the spherical workpiece. An arc surface is formed on the surface of the support block 102 close to the inner wall of the spherical workpiece, so as to improve the adaptability to the inner wall surface of the spherical workpiece. A buffer pad 104 is fixed on the arc surface of the support block 102. The buffer pad 104 is a sponge pad or a rubber pad.

[0056] The above are all the preferred embodiments of this application. The protection scope of this application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. An adjustable spherical grinding machine, comprising a support mechanism (1) and a grinding mechanism (2). The support mechanism (1) is used to support and fix a spherical workpiece and drive the spherical workpiece to rotate. The grinding mechanism (2) is used to grind the outer peripheral surface of the spherical workpiece, characterized in that: It further includes a rotational driving source (3) and a supporting base (4), wherein the rotational driving source (3) is used to drive the supporting base (4) to rotate, and the supporting mechanism (1) is slidably arranged on the supporting base (4) along the axial direction of the spherical workpiece.

2. The adjustable spherical grinding machine according to claim 1, wherein: It further includes a sliding driving source (5) and a sliding seat (6), the supporting mechanism (1) is arranged on the sliding seat (6), the supporting mechanism (1) includes a rotational driving source (11) and an expansion assembly (12), the rotational driving source (11) is used to drive the expansion assembly (12) to rotate, the expansion assembly (12) is used to abut and support the inner surface of the spherical workpiece, a slide rail (61) is arranged on the sliding seat (6), a chute (41) for inserting and sliding of the slide rail (61) is formed on the supporting base (4), and the sliding driving source (5) is used to drive the sliding seat (6) to slide on the supporting base (4).

3. The adjustable spherical grinding machine according to claim 2, wherein: The supporting mechanism (1) further includes an adjusting driving source (13) and an auxiliary supporting assembly (14), the auxiliary supporting assembly (14) is used to abut against the expansion assembly (12), the auxiliary supporting assembly (14) is slidably arranged on the sliding seat (6), and the adjusting driving source (13) is used to drive the auxiliary supporting assembly (14) to move.

4. The adjustable spherical grinding machine according to claim 2, wherein: The expansion assembly (12) includes an expansion driving structure (121) and multiple groups of support rods (122), the multiple groups of support rods (122) are arranged around the central axis of the spherical workpiece, the support rods (122) expand and contract along the radial direction of the spherical workpiece, and the expansion driving structure (121) is used to drive the support rods (122) to expand and contract.

5. The adjustable spherical grinding machine according to claim 4, characterized in that: The expansion driving structure (121) includes a sliding rod (123), the sliding rod (123) is slidably arranged on the rotational driving source (11) along the axial direction of the spherical workpiece, a driving inclined surface (124) is formed on the outer peripheral surface of the sliding rod (123), the distance between the driving inclined surface (124) and the central axis of the spherical workpiece decreases along the moving direction of the sliding rod (123), and the driving inclined surface (124) is used to abut against the support rod (122).

6. The adjustable spherical grinder according to claim 5, characterized in that: The expansion driving structure (121) further includes a handwheel (125) and a rotating block (126) arranged on the handwheel (125), the handwheel (125) is rotatably arranged on the rotational driving source (11) around the central axis of the spherical workpiece, a threaded hole is formed in the rotating block (126), and the sliding rod (123) is threadedly connected with the rotating block (126).

7. The adjustable spherical grinder according to claim 6, characterized in that: The rotation drive source (11) is a drive motor (111). A plurality of sliding grooves (112) are formed on the outer peripheral surface of the output shaft of the drive motor (111). The plurality of sliding grooves (112) are distributed around the rotation axis of the output shaft of the drive motor (111). A locking block (7) is slidably arranged in the sliding groove (112). A locking elastic member (8) is connected between the locking block (7) and the bottom wall of the sliding groove (112). The locking elastic member (8) is used to drive the locking block (7) to pop out of the sliding groove (112). A locking hole (127) for inserting the locking block (7) is formed on the handwheel (125). A recovery inclined surface (71) is formed on the locking block (7). The hole wall of the locking hole (127) is used to slidably abut against the recovery inclined surface (71) to press the locking block (7) back into the sliding groove (112).

8. The adjustable spherical grinding machine according to claim 7, characterized in that: It further includes an unlocking ring (9). The unlocking ring (9) is rotatably arranged on the output shaft of the drive motor (111). The unlocking ring (9) is located on one side of the handwheel (125) close to the rotation axis of the output shaft of the drive motor (111). A plurality of jacks (91) corresponding to the locking blocks (7) one by one are formed on the unlocking ring (9). The jacks (91) are used for inserting the locking blocks (7). An installation groove (113) is formed on the outer peripheral surface of the output shaft of the drive motor (111). A clamping block (100) is slidably arranged in the installation groove (113). A locking elastic member (101) is connected between the clamping block (100) and the bottom wall of the installation groove (113). The locking elastic member (101) is used to drive the clamping block (100) to pop out of the installation groove (113). A locking hole (92) and an unlocking hole (93) for inserting the clamping block (100) are formed on the unlocking ring (9). The locking hole (92) and the unlocking hole (93) are distributed around the central axis of the unlocking ring (9). When the clamping block (100) is inserted into the locking hole (92), the locking block (7) is inserted into the jack (91). When the clamping block (100) is inserted into the unlocking hole (93), the locking block (7) exits the jack (91) and is pressed back into the sliding groove (112) by the inner wall surface of the unlocking ring (9).

9. The adjustable spherical grinding machine according to claim 4, wherein: A support block (102) is arranged at the end of the support rod (122). A buffer elastic member (103) is connected between the support block (102) and the support rod (122). The buffer elastic member (103) is used to drive the support block (102) to extrude and abut against the inner wall of the spherical workpiece.

10. The adjustable spherical grinding machine according to claim 9, wherein: An elastic buffer pad (104) is arranged at the end of the support block (102) away from the support rod (122).

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