Grinding head clamp for polishing 3D mobile phone rear cover glass

Abstract

The invention discloses a grinding head clamp for 3D mobile phone rear cover glass polishing, and relates to the technical field of glass polishing, the grinding head clamp comprises a connecting shaft and a grinding head main body, the upper side of the grinding head main body is fixedly connected with a connecting handle, the inner side of the connecting shaft is provided with an insertion hole matched with the connecting handle, the lower end of the connecting shaft is fixedly connected with a fixing plate, and the fixing plate is fixedly connected with the grinding head main body. A limiting unit for clamping the connecting handle is arranged on the outer side of the fixing plate and comprises a plurality of moving holes. According to the grinding head clamp for polishing the 3D mobile phone rear cover glass, through the arrangement of a rotating ring, a connecting shaft, a conical ring, a contact rod, a moving hole, a limiting groove, limiting pipes, a bottom block and an L-shaped plate, the rotating ring can be conveniently rotated, the multiple limiting pipes can be conveniently controlled to limit a connecting handle on the grinding head body, and through a lifting rod, a stabilizing plate and a reinforcing block at the bottom, the grinding head body can be conveniently fixed; and a plurality of reinforcing blocks at the bottom limit the other part of the connecting handle, so that the clamping force of the grinding head is more uniform, and the grinding head is more stable when the 3D mobile phone rear cover glass is polished.

Description

Technical Field

[0001] The invention relates to the technical field of glass polishing, in particular to a grinding head fixture used for polishing the rear cover glass of a 3D mobile phone. Background Art

[0002] A 3D mobile phone refers to a smartphone that can achieve naked-eye 3D display or 3D interactive functions. Through special screen technology or sensors, users can experience stereoscopic visual effects without wearing 3D glasses.

[0003] After searching, the Chinese patent with application number "CN201811553878.2" is specifically a polishing machine for quickly replacing grinding heads or grinding head clamps. When the external grinding head needs to be clamped, the second outer ring sleeve is pushed, and the second outer ring sleeve pushes the second spring member to move. The second clamping member is disengaged from the pressure of the second spring member, and the second clamping member moves along the axial direction of the second through hole toward the direction of the second outer ring sleeve until the external grinding head is installed in place. The second outer ring sleeve is released, and the second spring member returns to its original position along the axial direction of the second through hole, pressing the rod of the external grinding head again to complete the fixation of the external grinding head.

[0004] When polishing the 3D collection back cover glass, the glass is polished by a rotating grinding head. The grinding head needs to be installed on the output shaft using a clamp before use. In the prior art, the shank on the grinding head is inserted into the clamp of the clamp for clamping, but part of the position of the shank of the grinding head is not limited, and only the part inserted into the clamping sleeve of the clamp is limited, which makes the stability of the grinding head low during polishing and the clamping force distribution uneven. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a grinding head fixture for polishing the back cover glass of a 3D mobile phone, which solves the problem of uneven clamping force when the grinding head fixture clamps the grinding head.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A grinding head fixture for polishing the back cover glass of a 3D mobile phone comprises a connecting shaft and a grinding head body, wherein a connecting handle is fixedly connected to the upper side of the grinding head body, a socket adapted to the connecting handle is provided on the inner side of the connecting shaft, a fixing plate is fixedly connected to the lower end of the connecting shaft, a limiting unit for clamping the connecting handle is provided on the outer side of the fixing plate, the limiting unit comprises a plurality of movable holes, the movable holes are provided on the outer side of the connecting shaft, a plurality of limiting grooves are provided on the outer side of the connecting handle, a stabilizing component for reinforcing the connecting handle is provided on the lower side of the fixing plate, a control component for controlling the stabilizing component is provided on the upper side of the fixing plate, and a reinforcing component is provided on the outer side of the control component.

[0007] Preferably, the control component includes a swivel, which is arranged on the outer side of the connecting shaft, and a conical ring and a control ring are fixedly connected to the outer side of the swivel, and the control ring is located below the conical ring. Limiting tubes are provided on the inner sides of the plurality of movable holes, and the limiting tubes are adapted to the limiting grooves. A fixing ring is fixedly connected to the outer side of the limiting tube, and a bottom block is fixedly connected to the lower side of the fixing ring, and an L-shaped plate is fixedly connected to the lower side of the bottom block, and a contact rod is fixedly connected to the side of the L-shaped plate close to the conical ring, and an arc block is provided at the outer end of the contact rod, and the arc block is against the conical ring, and a spring is fixedly connected between the connecting shaft and the bottom block.

[0008] Preferably, an internal thread is provided on the inner side of the rotating ring, an external thread is provided on the outer side of the connecting shaft, the external thread is adapted to fit the internal thread, and a plurality of control rods are fixedly connected to the outer side of the control ring.

[0009] Preferably, the stabilizing assembly includes a bottom ring, which is rotatably connected to the lower side of the control ring, and the lower side of the bottom ring is fixedly connected to a lifting ring, and the lower side of the lifting ring is fixedly connected to a plurality of lifting rods, the lower end of the lifting rod passes through the lower side of a fixed plate, and the lower side of the fixed plate is fixedly connected to a plurality of branch blocks, and the outer sides of the plurality of branch blocks are rotatably connected to a stabilizing plate, and the stabilizing plate is fixedly connected to a reinforcement block on a side close to the connecting handle, and a rectangular groove 2 is provided at the lower end of the lifting rod, and an inclined plate 2 is rotatably connected to the inner side of the rectangular groove 2, and a rotating block 2 is fixedly connected to the upper side of the stabilizing plate, and the rotating block 2 is rotatably connected to the inclined plate 2, and the reinforcement block is an arc structure.

[0010] The cam is provided with a plurality of expansion slots on the outer side of the limit tube, and a plurality of stabilizing blocks are provided on the inner side of the plurality of expansion slots, and a moving rod is fixedly connected to the outer side of the stabilizing block, and a rectangular slot is provided on the inner side of the limit tube, and an inclined plate is rotatably connected to the inner side of the rectangular slot, and a piston disc is provided on the inner side of the limit tube, and a push block is fixedly connected to the outer side of the piston disc near the connecting handle, and the rotating block is rotatably connected to the inclined plate, and a spring is fixedly connected between the outer side of the push block and the inner wall of the limit tube, and a gas cylinder is fixedly connected to the side of the bottom block away from the connecting shaft, and a connecting pipe is fixedly connected between the gas cylinder and the limit tube, a piston disc second is provided on the inner side of the gas cylinder, a spring three is fixedly connected between one side of the piston disc second and the inner wall of the gas cylinder, and a squeezing rod is fixedly connected to the other side of the piston disc second, and the squeezing rod is slidably connected to the bottom block.

[0011] Preferably, the second piston disc is slidably connected to the air cylinder, the first piston disc is slidably connected to the limiting tube, and the stabilizing block is slidably connected to the telescopic slot.

[0012] Preferably, a through hole adapted to the connecting handle is provided on the lower side of the fixing plate, and the reinforcing block is made of rubber material.

[0013] Beneficial Effects The present invention provides a grinding head fixture for polishing the rear cover glass of a 3D mobile phone. Compared with the prior art, it has the following beneficial effects: (1) The grinding head fixture for polishing the back cover glass of a 3D mobile phone is provided with a rotating ring, a connecting shaft, a conical ring, a contact rod, a moving hole, a limiting groove, a limiting tube, a bottom block, and an L-shaped plate, so that it is convenient to rotate the rotating ring and control multiple limiting tubes to limit the connecting handle on the grinding head body. Through the lifting rod, the stabilizing plate and the reinforcing block at the bottom, the multiple reinforcing blocks at the bottom limit the other part of the connecting handle, so that the clamping force of the grinding head is more uniform, and the grinding head is more stable when polishing the back cover glass of a 3D mobile phone.

[0014] (2) The grinding head fixture for polishing the back cover glass of a 3D mobile phone is provided with a limit tube, a stabilizing block, a moving rod, an inclined plate 1, a piston disc 1, an air cylinder, a piston disc 2 and an extrusion rod. When the limit tube limits the connection handle, the multiple stabilizing blocks in the limit tube are controlled to expand, thereby increasing the limiting effect of the stabilizing block limit tube on the connection handle and improving the stability of the grinding head installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the overall three-dimensional structure diagram of the present invention; Figure 2 It is a cross-sectional three-dimensional structural diagram of the present invention; Figure 3 It is a partial three-dimensional structural diagram of the present invention; Figure 4 for Figure 3 The enlarged view of point A in the middle; Figure 5 It is a three-dimensional structural diagram of the stabilizing component in the present invention; Figure 6 for Figure 5 The enlarged view of point B in the middle; Figure 7 It is a cross-sectional three-dimensional structural diagram of the reinforcement component in the present invention; Figure 8 for Figure 7 Enlarged view of point C in the middle; Fig. 9 for Figure 7 Enlarged view of point D in the middle.

[0016] In the figure: 1. connecting shaft; 2. fixing plate; 3. connecting handle; 4. grinding head body; 5. limiting unit; 6. socket; 7. external thread; 51. Moving hole; 52. Limiting groove; 53. Control component; 54. Reinforcement component; 55. Stabilization component; 531, swivel; 532, conical ring; 533, control ring; 534, control rod; 535, limit tube; 536, fixed ring; 537, bottom block; 538, L-shaped plate; 539, contact rod; 5310, spring 1; 541, telescopic slot; 542, stabilizing block; 543, moving rod; 544, rectangular slot 1; 545, inclined plate 1; 546, rotating block 1; 547, pushing block; 548, piston disc 1; 549, spring 2; 5410, connecting pipe; 5411, air cylinder; 5412, spring 3; 5413, piston disc 2; 5414, extrusion rod; 551. Bottom ring; 552. Lifting ring; 553. Lifting rod; 554. Rectangular groove 2; 555. Branch block; 556. Stabilizing plate; 557. Inclined plate 2; 558. Rotating block 2; 559. Reinforcement block. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Embodiment 1 See also Figure 1 - Figure 6 The present invention provides a technical solution: a grinding head fixture for polishing the back cover glass of a 3D mobile phone, comprising a connecting shaft 1 and a grinding head body 4, a connecting handle 3 is fixedly connected to the upper side of the grinding head body 4, a socket 6 adapted to the connecting handle 3 is provided on the inner side of the connecting shaft 1, a fixing plate 2 is fixedly connected to the lower end of the connecting shaft 1, a limiting unit 5 for clamping the connecting handle 3 is arranged on the outer side of the fixing plate 2, the limiting unit 5 comprises a plurality of moving holes 51, the moving holes 51 are arranged on the outer side of the connecting shaft 1, a plurality of limiting grooves 52 are arranged on the outer side of the connecting handle 3, a stabilizing component 55 for reinforcing the connecting handle 3 is arranged on the lower side of the fixing plate 2, a control component 53 for controlling the stabilizing component 55 is arranged on the upper side of the fixing plate 2, a reinforcing component 54 is arranged on the outer side of the control component 53, when installing the grinding head body 4, the connecting handle 3 is first inserted into the socket 6, and then the connecting handle 3 is conveniently and quickly limited by the limiting unit 5, and the installation stability of the grinding head body 4 is increased.

[0019] The control assembly 53 includes a swivel 531, which is arranged on the outer side of the connecting shaft 1. A conical ring 532 and a control ring 533 are fixedly connected to the outer side of the swivel 531. The control ring 533 is located below the conical ring 532. Limiting tubes 535 are arranged on the inner sides of the plurality of moving holes 51. The limiting tubes 535 are adapted to the limiting grooves 52. A fixing ring 536 is fixedly connected to the outer side of the limiting tube 535. A bottom block 537 is fixedly connected to the lower side of the fixing ring 536. An L-shaped plate 538 is fixedly connected to the lower side of the bottom block 537. A contact rod 539 is fixedly connected to the side of the L-shaped plate 538 close to the conical ring 532. An arc block is arranged on the outer end of the contact rod 539. The arc block abuts against the conical ring 532. A spring 5310 is fixedly connected between the connecting shaft 1 and the bottom block 537. An internal thread is arranged on the inner side of the swivel 531. The external thread 7 is adapted to be arranged with the internal thread, and a plurality of control rods 534 are fixedly connected to the outer side of the control ring 533. When installing the connecting handle 3, firstly, the control ring 533 is rotated by the control rod 534, and the control ring 533 drives the swivel 531 to rotate, and the swivel 531 drives the conical ring 532 to rotate. Since the swivel 531 is threadedly connected with the connecting shaft 1, the swivel 531 drives the conical ring 532 to rise, and the conical ring 532 squeezes the contact rod 539 to move in the direction close to the connecting handle 3, and the contact rod 539 drives the L-shaped plate 538 to move, and the L-shaped plate 538 drives the bottom block 537 to move, and the bottom block 537 drives the fixed ring 536 to move, and the fixed ring 536 drives the limiting tube 535 to move, so that the plurality of limiting tubes 535 move into the limiting groove 52, so that the plurality of limiting tubes 535 perform preliminary limiting on the grinding head body 4 on the connecting handle 3.

[0020] The stabilizing assembly 55 comprises a bottom ring 551, which is rotatably connected to the lower side of the control ring 533, a lifting ring 552 is fixedly connected to the lower side of the bottom ring 551, a plurality of lifting rods 553 are fixedly connected to the lower side of the lifting ring 552, the lower end of the lifting rod 553 passes through the lower side of the fixing plate 2, a plurality of branch blocks 555 are fixedly connected to the lower side of the fixing plate 2, the outer sides of the plurality of branch blocks 555 are all rotatably connected to a stabilizing plate 556, a reinforcing block 559 is fixedly connected to the side of the stabilizing plate 556 close to the connecting handle 3, a rectangular groove 554 is provided at the lower end of the lifting rod 553, an inclined plate 557 is rotatably connected to the inner side of the rectangular groove 554, and a rotating block 556 is fixedly connected to the upper side of the stabilizing plate 556. 58. The rotating block 558 is rotatably connected to the inclined plate 557. The reinforcement block 559 is an arc-shaped structure. A through hole adapted to the connecting handle 3 is provided on the lower side of the fixed plate 2. The reinforcement block 559 is made of rubber material. When the limiting tube 535 limits the connecting handle 3, the control ring 533 drives the bottom ring 551 to rise, the bottom ring 551 drives the lifting ring 552 to rise, the lifting ring 552 drives the lifting rod 553 to rise, the lifting rod 553 drives the inclined plate 557 to rotate, the inclined plate 557 drives the reinforcement block 559 on the stabilizing plate 556 to approach the connecting handle 3, so that multiple reinforcement blocks 559 limit another position of the connecting handle 3, so that the clamping force of the grinding head body 4 is evenly distributed, thereby increasing the stability of the clamping.

[0021] Embodiment 2 like Figure 7 - Fig. 9 As shown, a grinding head fixture for polishing the back cover glass of a 3D mobile phone comprises a connecting shaft 1 and a grinding head body 4, a connecting handle 3 is fixedly connected to the upper side of the grinding head body 4, a socket 6 adapted to the connecting handle 3 is provided on the inner side of the connecting shaft 1, a fixing plate 2 is fixedly connected to the lower end of the connecting shaft 1, a limiting unit 5 for clamping the connecting handle 3 is provided on the outer side of the fixing plate 2, the limiting unit 5 comprises a plurality of movable holes 51, the movable holes 51 are provided on the outer side of the connecting shaft 1, a plurality of limiting grooves 52 are provided on the outer side of the connecting handle 3, a stabilizing component 55 for reinforcing the connecting handle 3 is provided on the lower side of the fixing plate 2, a control component 53 for controlling the stabilizing component 55 is provided on the upper side of the fixing plate 2, a reinforcing component 54 is provided on the outer side of the control component 53, when installing the grinding head body 4, the connecting handle 3 is first inserted into the socket 6, and then the connecting handle 3 is limited quickly and conveniently through the limiting unit 5, and the installation stability of the grinding head body 4 is increased.

[0022] The reinforcement component 54 includes a plurality of expansion slots 541 on the outer side of the limiting tube 535, and a stabilizing block 542 is arranged on the inner side of each of the expansion slots 541. A moving rod 543 is fixedly connected to the outer side of the stabilizing block 542. A rectangular slot 544 is arranged on one end of the moving rod 543 and is located on the inner side of the limiting tube 535. An inclined plate 545 is rotatably connected to the inner side of the rectangular slot 544. A piston disc 548 is arranged on the inner side of the limiting tube 535. A push block 547 is fixedly connected to the side of the piston disc 548 close to the connecting handle 3. A rotating block 546 is fixedly connected to the outer side of the pushing block 547. The rotating block 546 and the inclined plate A spring 549 is fixedly connected between the outer side of the push block 547 and the inner wall of the limiting tube 535, a gas cylinder 5411 is fixedly connected to the side of the bottom block 537 away from the connecting shaft 1, a connecting tube 5410 is fixedly connected between the gas cylinder 5411 and the limiting tube 535, a piston disc 5413 is arranged on the inner side of the gas cylinder 5411, a spring 3 5412 is fixedly connected between one side of the piston disc 5413 and the inner wall of the gas cylinder 5411, an extrusion rod 5414 is fixedly connected to the other side of the piston disc 5413, the extrusion rod 5414 is slidably connected to the bottom block 537, and the piston disc 5413 is fixedly connected to the inner wall of the gas cylinder 5411. The piston plate 1 548 is slidably connected to the gas cylinder 5411, the piston plate 1 548 is slidably connected to the limiting tube 535, and the stabilizing block 542 is slidably connected to the telescopic slot 541. When the limiting tube 535 moves into the limiting slot 52, the bottom block 537 drives the gas cylinder 5411 to move, and the gas cylinder 5411 drives the extrusion rod 5414 on the piston plate 2 5413 to move. When the extrusion rod 5414 contacts the connecting shaft 1, the limiting tube 535 is continuously controlled to move, so that the extrusion rod 5414 drives the piston plate 2 5413 to move away from the connecting shaft 1, and the piston plate 2 5413 pushes out the gas in the gas cylinder 5411 and passes through the connecting tube 541 0, the gas is delivered to the limiting tube 535, the gas pushes the piston plate 548 to move, the piston plate 548 drives the push block 547 to move, the push block 547 drives the inclined plate 545 to rotate, the inclined plate 545 drives the moving rod 543 to move, the moving rod 543 drives the stabilizing block 542 to move, so that the multiple stabilizing blocks 542 are expanded outward, and because the limiting tube 535 is located in the limiting groove 52, the stabilizing block 542 is against the inner wall of the limiting groove 52 and the moving hole 51, so that the limiting effect of the limiting tube 535 on the connecting handle 3 is increased, the stability of the installation of the grinding head body 4 is enhanced, and it is convenient to polish the back cover glass of the 3D mobile phone later.

[0023] Working principle: When in use, the staff first inserts the connecting handle 3 into the socket 6, and then rotates the control ring 533 to control the conical ring 532 on the rotating ring 531 to rise. Under the action of the contact rod 539, the L-shaped plate 538, the bottom block 537, and the fixed ring 536, the multiple limiting tubes 535 are controlled to move toward the connecting handle 3, so that the multiple limiting tubes 535 can initially limit the connecting handle 3. At the same time, the control ring 533 controls the lifting rod 553 to rise under the action of the bottom ring 551 and the lifting ring 552. Under the action of the inclined plate 2 557 and the stabilizing plate 556, the multiple reinforcement blocks 559 are controlled to clamp and limit the other part of the connecting handle 3, so that the clamping force on the grinding head body 4 is more uniform. At the same time, the limiting tube 535 drives the extrusion rod 5414 to move. When the extrusion rod 5414 contacts the connecting shaft 1, under the action of the piston disk 2 5413, the connecting tube 5410, the piston disk 1 548 and the inclined plate 1 545, the multiple stabilizing blocks 542 are controlled to expand outward, thereby increasing the stability of the limiting tube 535 in limiting the connecting handle 3.

[0024] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A grinding head fixture for polishing the back cover glass of a 3D mobile phone, comprising a connecting shaft (1) and a grinding head body (4), wherein a connecting handle (3) is fixedly connected to the upper side of the grinding head body (4), and a socket (6) adapted to the connecting handle (3) is provided on the inner side of the connecting shaft (1), characterized in that: The lower end of the connecting shaft (1) is fixedly connected to a fixing plate (2), and a limiting unit (5) for clamping the connecting handle (3) is arranged on the outer side of the fixing plate (2), and the limiting unit (5) comprises a plurality of movable holes (51), and the movable holes (51) are arranged on the outer side of the connecting shaft (1). A plurality of limiting grooves (52) are arranged on the outer side of the connecting handle (3), and a stabilizing component (55) for reinforcing the connecting handle (3) is arranged on the lower side of the fixing plate (2), and a control component (53) for controlling the stabilizing component (55) is arranged on the upper side of the fixing plate (2), and a reinforcing component (54) is arranged on the outer side of the control component (53).

2. The grinding head fixture for polishing the rear cover glass of a 3D mobile phone according to claim 1, characterized in that: The control assembly (53) comprises a rotating ring (531), the rotating ring (531) being arranged on the outside of the connecting shaft (1), the outer side of the rotating ring (531) being fixedly connected to a conical ring (532) and a control ring (533), the control ring (533) being located below the conical ring (532), and the inner sides of the plurality of movable holes (51) being provided with a limiting tube (535), the limiting tube (535) being adapted to the limiting groove (52), the outer side of the limiting tube (535) being fixedly connected to a A fixing ring (536), wherein a bottom block (537) is fixedly connected to the lower side of the fixing ring (536), an L-shaped plate (538) is fixedly connected to the lower side of the bottom block (537), a contact rod (539) is fixedly connected to the side of the L-shaped plate (538) close to the conical ring (532), an arc block is provided at the outer end of the contact rod (539), the arc block is abutted against the conical ring (532), and a spring 1 (5310) is fixedly connected between the connecting shaft (1) and the bottom block (537).

3. The grinding head fixture for polishing the rear cover glass of a 3D mobile phone according to claim 2, characterized in that: An internal thread is provided on the inner side of the rotating ring (531), an external thread (7) is provided on the outer side of the connecting shaft (1), the external thread (7) is adapted to fit the internal thread, and a plurality of control rods (534) are fixedly connected to the outer side of the control ring (533).

4. The grinding head fixture for polishing the rear cover glass of a 3D mobile phone according to claim 2, characterized in that: The stabilizing component (55) comprises a bottom ring (551), the bottom ring (551) being rotatably connected to the lower side of the control ring (533), the lower side of the bottom ring (551) being fixedly connected to a lifting ring (552), the lower side of the lifting ring (552) being fixedly connected to a plurality of lifting rods (553), the lower ends of the lifting rods (553) passing through the lower side of the fixing plate (2), the lower side of the fixing plate (2) being fixedly connected to a plurality of branch blocks (555), the outer sides of the plurality of branch blocks (555) being A stabilizing plate (556) is rotatably connected, and a reinforcing block (559) is fixedly connected to the side of the stabilizing plate (556) close to the connecting handle (3). A rectangular groove (554) is provided at the lower end of the lifting rod (553), and an inclined plate (557) is rotatably connected to the inner side of the rectangular groove (554). A rotating block (558) is fixedly connected to the upper side of the stabilizing plate (556), and the rotating block (558) is rotatably connected to the inclined plate (557). The reinforcing block (559) is an arc-shaped structure.

5. The grinding head fixture for polishing the rear cover glass of a 3D mobile phone according to claim 2, characterized in that: The reinforcement component (54) comprises a plurality of telescopic grooves (541) formed on the outer side of a position limiting tube (535), a stabilizing block (542) being provided on the inner side of each of the plurality of telescopic grooves (541), a moving rod (543) being fixedly connected to the outer side of the stabilizing block (542), a rectangular groove (544) being formed on one end of the moving rod (543) and located on the inner side of the position limiting tube (535), an inclined plate (545) being rotatably connected to the inner side of the rectangular groove (544), a piston disc (548) being provided on the inner side of the position limiting tube (535), a push block (547) being fixedly connected to the side of the piston disc (548) close to the connecting handle (3), a rotating block (546) being fixedly connected to the outer side of the pushing block (547), and the rotating block (546) being fixedly connected to the outer side of the rotating block (546). The bottom block (537) is fixedly connected to the bottom block (537) at a side away from the connecting shaft (1) with a gas cylinder (5411), and a connecting pipe (5410) is fixedly connected between the gas cylinder (5411) and the limiting pipe (535). A piston disc (5413) is provided on the inner side of the gas cylinder (5411), and a spring (5412) is fixedly connected between one side of the piston disc (5413) and the inner wall of the gas cylinder (5411). The other side of the piston disc (5413) is fixedly connected to an extrusion rod (5414), and the extrusion rod (5414) is slidably connected to the bottom block (537).

6. The grinding head fixture for polishing the rear cover glass of a 3D mobile phone according to claim 5, characterized in that: The second piston disc (5413) is slidably connected to the air cylinder (5411), the first piston disc (548) is slidably connected to the limit tube (535), and the stabilizing block (542) is slidably connected to the telescopic slot (541).

7. The grinding head fixture for polishing the rear cover glass of a 3D mobile phone according to claim 4, characterized in that: A through hole adapted to the connecting handle (3) is provided on the lower side of the fixing plate (2), and the reinforcing block (559) is made of rubber material.

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