CN209868217U - Cavity finish machining equipment - Google Patents

Abstract

The utility model discloses a finish machining equipment of cavity, including water tank, support frame and fourth bearing board, the universal wheel is all installed at the both ends of water tank bottom, the intermediate position department on the inside top of water tank evenly is provided with the through-hole, the support frame is installed to the one end on water tank top, the pipe that absorbs water that is connected with the water tank bottom is installed to the water pump input, the vertical third motor of installing of support frame top intermediate position department of water pump one side, the head of polishing is installed to the bottom in the pivot outside, there is the second motor water tank top both sides of support frame one side through base horizontal installation, second slide rail internally mounted have with the first slider of second slide rail assorted, second motor output horizontal installation has the first electric putter that is connected with first bearing board. The cavity finish machining equipment drives the second fixing plate to slide through the second spring so as to extrude and fix the workpiece under the action of the rubber pad, and is convenient to apply to workpieces of different sizes.

Description

Cavity finish machining equipment

Technical Field

The utility model relates to a cavity processing equipment technical field specifically is a cavity finish machining's equipment.

Background

The cavities are spaces of a mold in which a chip forming device main body is encapsulated by a plastic package material filled during injection molding in a plastic package mold, one plastic package has an upper cavity and a lower cavity which are matched, and the cavities are also used for describing the top and the bottom of the molded plastic package.

However, most of the cavity finish machining equipment in the market at present is inconvenient for processing dust generated by grinding, and most of the cavity finish machining equipment in the market at present is inconvenient for fixing workpieces, so that the cavity finish machining equipment is provided for solving the problems.

Disclosure of Invention

An object of the utility model is to provide a finish machining equipment of cavity to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a cavity finish machining device comprises a water tank, a support frame and a fourth bearing plate, wherein universal wheels are mounted at two ends of the bottom end of the water tank, an activated carbon layer is horizontally mounted at the upper end of the interior of the water tank, through holes are uniformly formed in the middle position of the top end of the interior of the water tank, the support frame is mounted at one end of the top end of the water tank, a water pump is horizontally mounted at one end of the top end of the support frame, a water suction pipe connected with the bottom end of the water tank is mounted at the input end of the water pump, a water outlet pipe penetrating through the top end of the support frame is mounted at the output end of the water pump, a third motor is vertically mounted at the middle position of the top end of the support frame at one side of the water pump, a rotating shaft penetrating through the top end of the support frame is vertically mounted at the output end of the third motor, a first sliding block matched with the second sliding rail is arranged in the second sliding rail, a first bearing plate is horizontally arranged at the top end of the first sliding block, a first electric push rod connected with the first bearing plate is horizontally arranged at the output end of the second motor, the first sliding rail is horizontally arranged at both ends of the top end of the first bearing plate, a second sliding block matched with the first sliding rail is arranged in the first sliding rail, a second bearing plate is horizontally arranged at the top end of the second sliding block, a first motor is horizontally arranged at the middle position of both ends of the top end of the second bearing plate, a lead screw is horizontally arranged at the output end of the first motor, a first sleeve matched with the lead screw is arranged outside the lead screw, the top end of the first sleeve is hinged with a first connecting rod through a hinged shaft, the top end of the first connecting rod is hinged with a fourth bearing plate through a hinged shaft, and both ends of the top end of the fourth bearing plate are vertically provided with a third sliding rail, a fourth sliding block matched with the third sliding rail is arranged in the third sliding rail, a fourth connecting rod is horizontally arranged on one side, away from the third sliding rail, of the fourth sliding block, a fourth spring is horizontally arranged on one end, close to the third sliding rail, of the outer side of the fourth connecting rod, on one side of the fourth spring, a third sleeve connected with the fourth spring is horizontally arranged on the outer side of the fourth connecting rod, a second connecting rod is hinged to the middle position of the outer side of the fourth connecting rod through a hinge shaft, the top end of the second connecting rod is hinged to a third bearing platform plate through the hinge shaft, a sliding groove is horizontally arranged on the middle position of the top end in the third bearing platform plate, third sliding blocks matched with the sliding groove are arranged at two ends in the sliding groove, a second fixing plate is vertically arranged at the middle position of the top end of the third sliding block, a rubber pad is adhered to the inner side of the second fixing plate, and first fixing plates are vertically, a second spring connected with the second fixing plate is uniformly and horizontally arranged at one end, close to the second fixing plate, of the first fixing plate, a fourth sleeve is uniformly and vertically arranged at the middle position of the top end of a fourth bearing plate on the inner side of the third slide rail, a third spring is vertically arranged in the fourth sleeve, a fifth connecting rod penetrating through the top end of the fourth sleeve is vertically arranged at the top end of the third spring, the top end of the fifth connecting rod is connected with the bottom end of the third bearing plate, second sleeves are uniformly and vertically arranged at the top ends of the second bearing plates on two sides of the first motor, a first spring is vertically arranged in the second sleeve, a third connecting rod penetrating through the top end of the second sleeve is vertically arranged at the top end of the first spring, the top end of the third connecting rod is connected with the bottom end of the fourth bearing plate, and a fourth motor is horizontally arranged at two ends of the top end of the first bearing plate on one side of the first, and a second electric push rod connected with the second bearing plate is horizontally arranged at the output end of the fourth motor.

Preferably, the universal wheels are provided with two groups, each group of universal wheels are provided with two universal wheels, and the universal wheels are internally provided with braking mechanisms.

Preferably, the second bearing plate is connected with the first slide rail and the first bearing plate in a sliding manner through the second slide block to form a sliding mechanism, and the first bearing plate is connected with the second slide rail in a sliding manner through the first slide block to form a sliding mechanism.

Preferably, the first connecting rod is respectively connected with the fourth bearing plate and the first sleeve rotating mechanism through a hinge shaft, and the first connecting rod is connected with the first sleeve and the screw rod in a sliding manner through the first sleeve to form a sliding mechanism.

Preferably, the second connecting rod is rotatably connected with the third sleeve through a hinge shaft to form a rotating mechanism, the third sleeve is connected with the fourth connecting rod through a fourth spring to form a telescopic mechanism, and the fourth connecting rod is slidably connected with the third sliding rail through a fourth sliding block to form a sliding mechanism.

Preferably, the second fixing plate is connected with the sliding groove through the third sliding block to form a sliding mechanism, and the second fixing plate is connected with the first fixing plate through the second spring to form a telescopic mechanism.

Compared with the prior art, the beneficial effects of the utility model are that: (1) the workpiece to be processed is placed on the third bearing plate through the third bearing plate, the second spring, the second fixing plate, the third sliding block, the sliding chute and the rubber pad, the second fixing plate is driven to slide in the sliding chute through the third sliding block under the elastic action of the second spring, and the workpiece is extruded and fixed under the action of the rubber pad, so that the workpiece processing device is convenient to adapt to workpieces with different sizes; (2) meanwhile, the device is provided with a third motor, a rotating shaft, a polishing head, a first motor, a screw rod, a first sleeve, a first connecting rod and a third bearing plate, when a workpiece needs to be processed, the third motor is started to drive the rotating shaft to rotate so as to drive the polishing head to rotate, the first motor is started to drive the screw rod to rotate so as to drive the first sleeve to slide left and right, and the first connecting rod is driven to rotate under the action of a hinged shaft so as to drive the third bearing plate to move up and down, so that the hole depth can be controlled conveniently; (3) meanwhile, the device is provided with a second motor, a fourth motor, a first electric push rod, a first bearing plate, a first slide block, a second slide rail, a second electric push rod, a second bearing plate, a second slide block and a first slide rail, when a workpiece is processed, the second motor and the fourth motor are started, the first electric push rod is driven to stretch under the action of the second motor so as to drive the first bearing plate to slide in the second slide rail through the first slide block, and the second electric push rod is driven to stretch under the action of the fourth motor so as to drive the second bearing plate to slide in the first slide rail through the second slide block, so that the workpiece can be processed conveniently; (4) meanwhile, the device is provided with a third bearing plate, a second connecting rod, a fifth connecting rod, a third sleeve, a fourth connecting rod, a fourth slider, a third slide rail, a third spring and a fourth spring, when the cavity finish machining equipment is used, impact force generated by vibration is respectively transmitted to the second connecting rod and the fifth connecting rod through the third bearing plate, the second connecting rod transmits the force to the third sleeve and the fourth connecting rod, so that the fourth connecting rod slides in the third slide rail through the fourth slider, the impact force is eliminated under the elastic force action of the third spring and the fourth spring, the buffer and the shock absorption are facilitated, and the service life of the cavity finish machining equipment is prolonged; (5) the device is through installing through-hole, water tank, water pump, outlet pipe, the pipe that absorbs water, head and activated carbon layer simultaneously, and when the equipment of this cavity finish machining was adding man-hour, earlier pour into appropriate amount clear water into through the through-hole to the water tank inside, start the water pump after that and make the clear water of water tank inside spout the head of polishing through outlet pipe and the pipe that absorbs water respectively, and the waste water after the use recycles through-hole and activated carbon layer to be convenient for handle the sweeps in the course of working.

Drawings

FIG. 1 is a front view of the cross-sectional structure of the present invention;

FIG. 2 is a right side view of the structure of the present invention;

FIG. 3 is an enlarged view of the portion A of FIG. 1 according to the present invention;

FIG. 4 is an enlarged view of the portion B of FIG. 1 according to the present invention;

fig. 5 is an enlarged schematic view of the part C in fig. 1 according to the present invention.

In the figure: 1. a first motor; 2. a first electric push rod; 3. a second motor; 4. a through hole; 5. a universal wheel; 6. a first slide rail; 7. a water tank; 8. an activated carbon layer; 9. a first slider; 10. a first deck plate; 11. a second slide rail; 12. a second slider; 13. a first sleeve; 14. a second deck plate; 15. a screw rod; 16. a first connecting rod; 17. a second connecting rod; 18. polishing head; 19. a third motor; 20. a rotating shaft; 21. a water outlet pipe; 22. a water pump; 23. a support frame; 24. a third connecting rod; 25. a second sleeve; 26. a first spring; 27. a suction pipe; 28. a first fixing plate; 29. a third deck plate; 30. a chute; 31. a third slider; 32. a rubber pad; 33. a second fixing plate; 34. a second spring; 35. a third slide rail; 36. a fourth slider; 37. a third spring; 38. a fourth deck plate; 39. a fourth spring; 40. a third sleeve; 41. a fourth connecting rod; 42. a fifth connecting rod; 43. a fourth sleeve; 44. a fourth motor; 45. a second electric push rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides an embodiment: a cavity finish machining device comprises a water tank 7, a support frame 23 and a fourth bearing plate 38, wherein universal wheels 5 are mounted at two ends of the bottom end of the water tank 7, two groups of universal wheels 5 are arranged, two universal wheels 5 are arranged in each group, a brake mechanism is arranged in each universal wheel 5 and is convenient to move, an activated carbon layer 8 is horizontally mounted at the upper end of the interior of the water tank 7, through holes 4 are uniformly formed in the middle position of the top end of the interior of the water tank 7, the support frame 23 is mounted at one end of the top end of the water tank 7, a water pump 22 is horizontally mounted at one end of the top end of the support frame 23, the water pump 22 can be an ISGD single-stage water pump, a water suction pipe 27 connected with the bottom end of the water tank 7 is mounted at the input end of the water pump 22, a water outlet pipe 21 penetrating through the top end, the type of the third motor 19 can be a Y80M1-2 motor, the output end of the third motor 19 is vertically provided with a rotating shaft 20 penetrating through the top end of a support frame 23, the bottom end of the outer side of the rotating shaft 20 is provided with a polishing head 18, two sides of the top end of a water tank 7 at one side of the support frame 23 are horizontally provided with a second motor 3 through a base, the type of the second motor 3 can be a Y90S-2 motor, the top end of the water tank 7 at one side of the second motor 3 far away from the support frame 23 is horizontally provided with a second slide rail 11, a first slide block 9 matched with the second slide rail 11 is arranged in the second slide rail 11, the top end of the first slide block 9 is horizontally provided with a first bearing plate 10, the output end of the second motor 3 is horizontally provided with a first electric push rod 2 connected with the first bearing plate 10, two ends of the top end of the first bearing plate 10 are both horizontally provided with first slide rails 6, a second, a second bearing plate 14 is horizontally arranged at the top end of the second sliding block 12, the second bearing plate 14 is connected with the first sliding rail 6 and the first bearing plate 10 through the second sliding block 12 in a sliding manner to form a sliding mechanism, the first bearing plate 10 is connected with the first sliding rail 6 and the second sliding rail 11 in a sliding manner to form a sliding mechanism, so that the sliding mechanism can move horizontally, a first motor 1 is horizontally arranged at the middle position of the two ends of the top end of the second bearing plate 14, the type of the first motor 1 can be Y90S-6, a screw rod 15 is horizontally arranged at the output end of the first motor 1, a first sleeve 13 matched with the screw rod 15 is arranged at the outer side of the screw rod 15, the top end of the first sleeve 13 is hinged with a first connecting rod 16 through a hinged shaft, the first connecting rod 16 is respectively connected with a fourth bearing plate 38 and a rotating mechanism of the first sleeve 13 through a hinged shaft, and the first connecting rod 16 is connected with the first sleeve 13 and, the hole depth is convenient to control, the top end of the first connecting rod 16 is hinged with a fourth bearing plate 38 through a hinged shaft, both ends of the top end of the fourth bearing plate 38 are vertically provided with a third slide rail 35, a fourth slider 36 matched with the third slide rail 35 is arranged in the third slide rail 35, one side of the fourth slider 36 far away from the third slide rail 35 is horizontally provided with a fourth connecting rod 41, one end of the outer side of the fourth connecting rod 41 close to the third slide rail 35 is horizontally provided with a fourth spring 39, the outer side of the fourth connecting rod 41 at one side of the fourth spring 39 is horizontally provided with a third sleeve 40 connected with the fourth spring 39, the middle position of the outer side of the fourth connecting rod 41 is hinged with a second connecting rod 17 through a hinged shaft, the second connecting rod 17 is rotatably connected with the third sleeve 40 through a hinged shaft to form a rotating mechanism, and the third sleeve 40 is connected with the fourth spring 39 through the fourth connecting rod 41 to, the fourth connecting rod 41 is connected with the third slide rail 35 through the fourth slide block 36 in a sliding way to form a sliding mechanism, so that the buffering and the shock absorption are convenient, the top end of the second connecting rod 17 is hinged with the third bearing plate 29 through a hinge shaft, the middle position of the top end inside the third bearing plate 29 is horizontally provided with a slide groove 30, the two ends inside the slide groove 30 are respectively provided with a third slide block 31 matched with the slide groove 30, the middle position of the top end of the third slide block 31 is vertically provided with a second fixing plate 33, the second fixing plate 33 is connected with the slide groove 30 through the third slide block 31 in a sliding way to form a sliding mechanism, the second fixing plate 33 is connected with the first fixing plate 28 through a second spring 34 to form a telescopic mechanism, so that workpieces with different sizes can be fixed conveniently, the inner side of the second fixing plate 33 is pasted with a rubber pad 32, and the middle positions of the, a second spring 34 connected with the second fixed plate 33 is uniformly and horizontally installed at one end of the first fixed plate 28 close to the second fixed plate 33, a fourth sleeve 43 is uniformly and vertically installed at the middle position of the top end of a fourth bearing plate 38 at the inner side of a third slide rail 35, a third spring 37 is vertically installed inside the fourth sleeve 43, a fifth connecting rod 42 penetrating through the top end of the fourth sleeve 43 is vertically installed at the top end of the third spring 37, the top end of the fifth connecting rod 42 is connected with the bottom end of the third bearing plate 29, second sleeves 25 are uniformly and vertically installed at the top ends of the second bearing plates 14 at two sides of the first motor 1, a first spring 26 is vertically installed inside the second sleeve 25, a third connecting rod 24 penetrating through the top end of the second sleeve 25 is vertically installed at the top end of the first spring 26, the top end of the third connecting rod 24 is connected with the bottom end of the fourth bearing plate 38, a fourth motor 44 is horizontally installed at two ends of the top end of the first bearing plate 10 at one side of, the model of the fourth motor 44 may be Y112M-6 motor, and the output end of the fourth motor 44 is horizontally installed with a second electric push rod 45 connected with the second bearing plate 14.

The working principle is as follows: when the cavity finish machining equipment is used, the cavity finish machining equipment is moved to a proper position through the universal wheel 5, then a workpiece to be machined is placed on the third bearing plate 29, the second fixing plate 33 is driven to slide in the sliding groove 30 through the third sliding block 31 under the action of the elastic force of the second spring 34 so as to extrude and fix the workpiece under the action of the rubber pad 32, therefore, the cavity finish machining equipment is suitable for workpieces with different sizes, when the workpiece needs to be machined, an external power supply is firstly switched on, the third motor 19 is started to drive the rotating shaft 20 to rotate so as to drive the grinding head 18 to rotate, the first motor 1 is started to drive the screw rod 15 to rotate so as to drive the first sleeve 13 to slide left and right, the first connecting rod 16 is driven to rotate under the action of the hinge shaft so as to drive the third bearing plate 29 to move up and down, so that the hole depth can be conveniently controlled, and when the workpiece is machined, the second, the first electric push rod 2 is driven to stretch under the action of the second motor 3 so as to drive the first bearing plate 10 to slide in the second slide rail 11 through the first slide block 9, the second electric push rod 45 is driven to stretch under the action of the fourth motor 44 so as to drive the second bearing plate 14 to slide in the first slide rail 6 through the second slide block 12 so as to facilitate the processing of workpieces, when the cavity finish machining equipment is used, impact force generated by vibration is respectively transmitted to the second connecting rod 17 and the fifth connecting rod 42 through the third bearing plate 29, the second connecting rod 17 transmits the force to the third sleeve 40 and the fourth connecting rod 41 so as to enable the fourth connecting rod 41 to slide in the third slide rail 35 through the fourth slide block 36, so that the impact force is eliminated under the elastic force action of the third spring 37 and the fourth spring 39, the buffering and the shock absorption are facilitated, and the service life of the cavity finish machining equipment is prolonged, when this cavity finish machining's equipment is adding man-hour, earlier pour into appropriate amount clear water into to water tank 7 inside through-hole 4, start water pump 22 makes the inside clear water of water tank 7 spout respectively through outlet pipe 21 and suction pipe 27 to the head 18 of polishing, and the waste water after the use recycles through-hole 4 and active carbon layer 8 to be convenient for handle the sweeps in the course of working, above do the utility model discloses a whole theory of operation.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (6)

1. The utility model provides a finish machining's of cavity equipment, includes water tank (7), support frame (23) and fourth cushion cap board (38), its characterized in that: universal wheels (5) are installed at two ends of the bottom end of the water tank (7), an activated carbon layer (8) is horizontally installed at the upper end of the interior of the water tank (7), through holes (4) are evenly formed in the middle position of the top end of the interior of the water tank (7), a support frame (23) is installed at one end of the top end of the water tank (7), a water pump (22) is horizontally installed at one end of the top end of the support frame (23), a water suction pipe (27) connected with the bottom end of the water tank (7) is installed at the input end of the water pump (22), a water outlet pipe (21) penetrating through the top end of the support frame (23) is installed at the output end of the water pump (22), a third motor (19) is vertically installed at the middle position of the top end of the support frame (23) on one side of the water pump (22), a rotating shaft (20) penetrating through, a second motor (3) is horizontally arranged on two sides of the top end of the water tank (7) on one side of the support frame (23) through a base, a second sliding rail (11) is horizontally arranged on the top end of the water tank (7) on one side of the support frame (23) far away from the second motor (3), a first sliding block (9) matched with the second sliding rail (11) is arranged in the second sliding rail (11), a first bearing plate (10) is horizontally arranged on the top end of the first sliding block (9), a first electric push rod (2) connected with the first bearing plate (10) is horizontally arranged at the output end of the second motor (3), first sliding rails (6) are horizontally arranged at two ends of the top end of the first bearing plate (10), a second sliding block (12) matched with the first sliding rails (6) is arranged in the first sliding rail (6), and a second bearing plate (14) is horizontally arranged at the top end of the second sliding block (12), a first motor (1) is horizontally arranged in the middle of two ends of the top end of the second bearing plate (14), a lead screw (15) is horizontally arranged at the output end of the first motor (1), a first sleeve (13) matched with the lead screw (15) is arranged on the outer side of the lead screw (15), a first connecting rod (16) is hinged to the top end of the first sleeve (13) through a hinged shaft, a fourth bearing plate (38) is hinged to the top end of the first connecting rod (16) through a hinged shaft, third sliding rails (35) are vertically arranged at two ends of the top end of the fourth bearing plate (38), a fourth sliding block (36) matched with the third sliding rails (35) is arranged inside the third sliding rails (35), a fourth connecting rod (41) is horizontally arranged on one side, far away from the third sliding rails (35), of one end, close to the third sliding rails (35), of the outer side of the fourth connecting rod (41) is horizontally arranged with a fourth spring (39), a third sleeve (40) connected with the fourth spring (39) is horizontally arranged on the outer side of a fourth connecting rod (41) on one side of the fourth spring (39), a second connecting rod (17) is hinged to the middle position of the outer side of the fourth connecting rod (41) through a hinge shaft, the top end of the second connecting rod (17) is hinged to a third bearing plate (29) through a hinge shaft, a sliding groove (30) is horizontally arranged at the middle position of the top end inside the third bearing plate (29), third sliding blocks (31) matched with the sliding groove (30) are arranged at two ends inside the sliding groove (30), a second fixing plate (33) is vertically arranged at the middle position of the top end of each third sliding block (31), a rubber pad (32) is adhered to the inner side of each second fixing plate (33), and first fixing plates (28) are vertically arranged at the middle positions of two ends of the top end of each third bearing plate (29), a second spring (34) connected with the second fixing plate (33) is uniformly and horizontally installed at one end, close to the second fixing plate (33), of the first fixing plate (28), a fourth sleeve (43) is uniformly and vertically installed at the middle position of the top end of a fourth bearing plate (38) on the inner side of the third sliding rail (35), a third spring (37) is vertically installed inside the fourth sleeve (43), a fifth connecting rod (42) penetrating through the top end of the fourth sleeve (43) is vertically installed at the top end of the third spring (37), the top end of the fifth connecting rod (42) is connected with the bottom end of the third bearing plate (29), second sleeves (25) are uniformly and vertically installed at the top ends of second bearing plates (14) on two sides of the first motor (1), a first spring (26) is vertically installed inside the second sleeve (25), and a third connecting rod (24) penetrating through the top end of the second sleeve (25) is vertically installed at the top end of the first spring (26), and the top of third connecting rod (24) is connected with fourth cushion cap board (38) bottom, the both ends on first cushion cap board (10) top of first slide rail (6) one side all have fourth motor (44) through base horizontal installation, and fourth motor (44) output horizontal installation has second electric putter (45) that are connected with second cushion cap board (14).

2. A cavity finishing apparatus as claimed in claim 1, wherein: the universal wheels (5) are arranged in two groups, each universal wheel (5) is provided with two universal wheels, and a braking mechanism is arranged inside each universal wheel (5).

3. A cavity finishing apparatus as claimed in claim 1, wherein: the second bearing plate (14) is connected with the first sliding rail (6) and the first bearing plate (10) through a second sliding block (12) in a sliding mode to form a sliding mechanism, and the first bearing plate (10) is connected with the second sliding rail (11) through a first sliding block (9) in a sliding mode to form the sliding mechanism.

4. A cavity finishing apparatus as claimed in claim 1, wherein: the first connecting rod (16) is respectively connected with the fourth bearing plate (38) and the first sleeve (13) through a hinge shaft to form a rotating mechanism, and the first connecting rod (16) is connected with the first sleeve (13) and the screw rod (15) in a sliding mode to form a sliding mechanism.

5. A cavity finishing apparatus as claimed in claim 1, wherein: the second connecting rod (17) is rotatably connected with the third sleeve (40) through a hinge shaft to form a rotating mechanism, the third sleeve (40) is connected with the fourth connecting rod (41) through a fourth spring (39) to form a telescopic mechanism, and the fourth connecting rod (41) is slidably connected with the third sliding rail (35) through a fourth sliding block (36) to form a sliding mechanism.

6. A cavity finishing apparatus as claimed in claim 1, wherein: the second fixing plate (33) is connected with the sliding groove (30) through a third sliding block (31) in a sliding mode to form a sliding mechanism, and the second fixing plate (33) is connected with the first fixing plate (28) through a second spring (34) to form a telescopic mechanism.