CN210452427U

CN210452427U - Processing positioner of camshaft

Info

Publication number: CN210452427U
Application number: CN201921043320.XU
Authority: CN
Inventors: 贾金鹏; 喻成山; 周松兵
Original assignee: Danjiangkou Huanyu Machinery Co Ltd
Current assignee: Danjiangkou Huanyu Machinery Co Ltd
Priority date: 2019-07-05
Filing date: 2019-07-05
Publication date: 2020-05-05
Anticipated expiration: 2029-07-05

Abstract

The utility model discloses a camshaft machining and positioning device, which comprises a bearing plate, wherein the upper surface of the bearing plate is provided with a chute, a sliding seat is slidably arranged in the chute, a lower driving assembly is arranged in the chute, the upper surface of the sliding seat is provided with a supporting rod, and the upper end of the supporting rod is provided with a fixed center; a fixed groove is formed in the side wall of the sliding groove, a sliding plate is installed inside the fixed groove, a height adjusting rod is installed on the upper surface of the sliding plate, and a locking assembly is installed on the outer side of the height adjusting rod; the height-adjusting rod is characterized in that a supporting plate is installed at the upper end of the height-adjusting rod, a guide groove is formed in the upper surface of the supporting plate, and an upper driving assembly is installed inside the guide groove. Has the advantages that: the device can satisfy the fixed of different length camshafts, is guaranteeing the machining precision of camshaft, and the tight inner core of clamp simultaneously can be changed, when having guaranteed camshaft machining precision, can satisfy the processing demand of more models camshaft, is fit for the small batch processing of camshaft.

Description

Processing positioner of camshaft

Technical Field

The utility model relates to a camshaft processing field, concretely relates to processing positioner of camshaft.

Background

The cam on the camshaft mainly functions in controlling the opening and closing of the air valve, the reaction is the angle of each cam on the camshaft, and the camshaft is mainly positioned through keys when being designed, processed and installed.

When the key groove on the cam shaft is machined, the cam shaft is mostly clamped and positioned through the special fixture, the fixture cannot be adjusted, the machining work of various types of cam shafts is difficult to adapt, when the cam shafts of different types are machined, the fixture needs to be integrally replaced, the operation is complex, and the special fixture for the cam shaft is not suitable for small-batch machining of the cam shafts.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a processing positioner of camshaft in order to solve above-mentioned problem, the utility model provides an it is fixed that preferred technical scheme device can satisfy different length camshafts among a great deal of technical scheme, presss from both sides tight inner core and can change, when having guaranteed camshaft machining precision, can satisfy the processing demand of more model camshafts, is fit for the technological effect of the small batch processing of camshaft, and the details are explained below.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a camshaft processing and positioning device, which comprises a bearing plate, wherein a chute is arranged on the upper surface of the bearing plate, two sliding seats are slidably arranged in the chute, the sliding seats are in clearance fit with the chute, a lower driving assembly for driving the two sliding seats to move towards or away from each other simultaneously is arranged in the chute, a vertical supporting rod is arranged on the upper surface of each sliding seat, a fixed center is arranged at the upper end of each supporting rod, the tips of the two fixed centers are opposite, and the fixed centers are used for clamping and fixing the camshaft in the length direction;

the two side walls in the width direction of the sliding chute are respectively provided with a fixed groove, the fixed grooves extend along the length direction of the sliding chute, sliding plates are slidably mounted inside the two fixed grooves, the sliding plates are in clearance fit with the two fixed grooves, the sliding plates are positioned between the two sliding seats, the upper surface of each sliding plate is provided with a height adjusting rod, and the outer side of each height adjusting rod is provided with a locking assembly for locking the position of the height adjusting rod;

the utility model discloses a cam shaft cam, including bearing board, guide block, guide way, riser, clamping inner core, two, the facing surface that presss from both sides tight inner core is the imitative face with cam surface matched with for press from both sides tight fixed to cam on the camshaft.

When the device is used, the bearing plate is arranged on the surface of a machine tool workbench through a bolt, the camshaft is transferred between the two fixed centers, the lower driving assembly drives the two sliding seats to slide in the sliding groove in opposite directions, the two supporting rods drive the two fixed centers to move in opposite directions, and the two fixed centers clamp and fix two ends of the camshaft; the locking of the locking component to the height-adjusting rod is released, the height-adjusting rod is moved, the supporting plate is driven to move by the height-adjusting rod under the guidance of the sliding plate and the fixed groove, when the clamping inner core and the cam on the cam shaft are positioned on the same vertical plane, the height-adjusting rod is locked and fixed by the locking component, the height of the height-adjusting rod is adjusted, the height-adjusting rod drives the supporting plate to lift, when the upper surface of the supporting plate is contacted with the lower end of the cam, the cam corresponds to the profiling surface, the upper driving component drives the two guide blocks to move in opposite directions, so that the vertical plate drives the clamping inner core to approach the cam, the profiling surface is contacted with the outer circular surface of the cam, the clamping and fixing of the cam are realized by the profiling surface, and the processing of the key groove of the cam shaft is facilitated, because the clamping inner core is detachably connected with the vertical plate, when camshaft of different models is processed, only the clamping inner core needs to be detached and replaced, the whole clamp does not need to be detached, and the operation is simpler; the device can realize the position adjustment of the fixed center, satisfies the fixation of camshafts with different lengths, and through the heightening rod with press from both sides tight inner core and can cooperate and press from both sides tight fixedly to the cam on the camshaft, guarantee the machining precision of camshaft, simultaneously press from both sides tight inner core and can change, when having guaranteed camshaft machining precision, can satisfy the processing demand of more models camshaft, be fit for the small batch processing of camshaft.

Preferably, the lower driving assembly includes a lower driving screw, the lower driving screw is rotatably installed inside the chute, any end of the lower driving screw penetrates through the chute and is provided with a lower turntable, the lower driving screw includes a first lower screw and a second lower screw, the first lower screw is coaxially connected with the second lower screw, the thread directions of the first lower screw and the second lower screw are opposite, the outer sides of the first lower screw and the second lower screw are respectively provided with a first lower moving block and a second lower moving block through threads, and the first lower moving block and the second lower moving block are both connected with the sliding seat.

Preferably, the height adjusting rod comprises a fixed cylinder body, the fixed cylinder body is vertically installed on the upper surface of the sliding plate, a vertical through groove is formed in the side wall of the fixed cylinder body in a penetrating mode, a rotating cylinder is installed inside the fixed cylinder body in a rotating mode, the upper end of the rotating cylinder penetrates out of the fixed cylinder body and is provided with a rotating nut, a lifting screw is installed inside the rotating nut through threads, the upper end of the lifting screw penetrates out of the rotating nut and is connected with the supporting plate, the bottom end of the lifting screw stretches into the inside of the fixed cylinder body and is provided with a sliding rod, and the sliding rod is in clearance fit with the through groove.

As preferred, the surface of loading board is provided with a plurality of locking hole, locking hole edge the length direction evenly distributed of fixed slot, locking subassembly includes the fixed plate, the fixed plate is installed the fixed barrel outside, the fixed plate surface runs through and is provided with the guiding hole, the guiding hole with locking hole is corresponding, the inside slidable mounting of guiding hole has the locking axle, wear out locking epaxial end the guiding hole, and install the arm-tie, wear out locking axle's bottom the guiding hole, and to locking hole extends, locking spring and clamp plate are installed to the locking axle outside, the clamp plate is located the fixed plate with between the loading board, locking spring is located the fixed plate with between the clamp plate.

Preferably, a pull ring is mounted at the upper end of the pull plate.

Preferably, the upper driving assembly comprises an upper driving screw, the upper driving screw is rotatably installed inside the guide groove, any end of the upper driving screw penetrates through the supporting plate and is provided with an upper rotary table, the upper driving screw comprises a first upper screw and a second upper screw, the first upper screw is coaxially connected with the second upper screw, the screw thread direction of the first upper screw is opposite to that of the second upper screw, a first upper moving block and a second upper moving block are respectively installed on the outer side of the first upper screw and the second upper screw through threads, and the first upper moving block and the second upper moving block are both connected with the guide block.

Preferably, the surface of the clamping inner core, which is far away from the profiling surface, is provided with an insertion block, the opposite surfaces of the two vertical plates are provided with insertion grooves, the sections of the insertion grooves and the insertion blocks are both in a dovetail shape, and the insertion grooves and the insertion blocks are in clearance fit, so that the insertion fit of the clamping inner core and the vertical plates is realized.

Has the advantages that: the device can realize the position control of fixed top, satisfies the fixed of different length camshafts, can cooperate through heightening the pole and pressing from both sides tight inner core and press from both sides tight fixedly to the cam on the camshaft, guarantees the machining precision of camshaft, presss from both sides tight inner core simultaneously and can change, when having guaranteed camshaft machining precision, can satisfy the processing demand of more models camshafts, is fit for the small batch processing of camshaft.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a front view of the present invention;

fig. 2 is a schematic view of the internal structure of the present invention;

fig. 3 is a left-side view of the internal structure of the present invention;

FIG. 4 is a left side view internal structure of the height adjusting rod of the present invention;

FIG. 5 is a left side internal view of the upper drive assembly of the present invention;

fig. 6 is a top view of the clamping core and riser of the present invention.

The reference numerals are explained below:

1. a carrier plate; 101. a chute; 102. fixing grooves; 103. a locking hole; 2. a sliding seat; 3. a support bar; 4. fixing the centre; 5. a sliding plate; 6. a height adjusting rod; 601. a lifting screw; 602. rotating the nut; 603. a rotating cylinder; 604. fixing the cylinder; 605. a through groove; 606. a slide bar; 7. a lower drive assembly; 701. a first lower moving block; 702. a lower drive screw; 703. a first lower screw; 704. a second lower screw; 705. a second lower moving block; 706. a lower turntable; 8. a locking assembly; 801. a pull ring; 802. pulling a plate; 803. a fixing plate; 804. a guide hole; 805. a locking spring; 806. pressing a plate; 807. a locking shaft; 9. a support plate; 901. a guide groove; 10. an upper drive assembly; 1001. a first upper screw; 1002. an upper drive screw; 1003. a first upper moving block; 1004. a second upper screw; 1005. a second upper moving block; 1006. an upper turntable; 11. a guide block; 12. a vertical plate; 1201. inserting grooves; 13. clamping the inner core; 1301. an insertion block; 1302. a profiling surface.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1 to 6, the utility model provides a camshaft machining and positioning device, including a bearing plate 1, a chute 101 is arranged on the upper surface of the bearing plate 1, two sliding seats 2 are slidably mounted inside the chute 101, the sliding seats 2 are in clearance fit with the chute 101, a lower driving assembly 7 for driving the two sliding seats 2 to move towards or away from each other simultaneously is mounted inside the chute 101, a vertical support rod 3 is mounted on the upper surface of the sliding seat 2, a fixed center 4 is mounted on the upper end of the support rod 3, and the tips of the two fixed centers 4 are opposite to each other for clamping and fixing the camshaft in the length direction;

two side walls in the width direction of the sliding groove 101 are respectively provided with a fixed groove 102, the fixed grooves 102 extend along the length direction of the sliding groove 101, sliding plates 5 are slidably mounted inside the two fixed grooves 102, the sliding plates 5 are in clearance fit with the two fixed grooves 102, the sliding plates 5 are positioned between the two sliding seats 2, the upper surface of each sliding plate 5 is provided with a height adjusting rod 6, and the outer side of each height adjusting rod 6 is provided with a locking assembly 8 for locking the position of the height adjusting rod 6;

bearing board 1 is worn out to heightening pole 6 upper end, and install horizontally backup pad 9, backup pad 9 upper surface is provided with guide way 901, guide way 901 extends along the width direction of spout 101, the inside slidable mounting of guide way 901 has two guide blocks 11, guide block 11 and guide way 901 clearance fit, guide way 901 internally mounted has the last drive assembly 10 that is used for driving two guide blocks 11 simultaneously to move in opposite directions or back to back of the body, guide block 11 upper surface installs riser 12, the face demountable installation in opposite directions of two risers 12 has the tight inner core 13 of clamp, the face of two tight inner cores 13 of clamp is the profile surface 1302 with cam surface matched with, be used for pressing from both sides tight fixedly to the cam on the camshaft.

As an alternative embodiment, the lower driving assembly 7 includes a lower driving screw 702, the lower driving screw 702 is rotatably installed inside the sliding chute 101, either end of the lower driving screw 702 penetrates through the sliding chute 101 and is installed with a lower rotating disc 706, the lower driving screw 702 includes a first lower screw 703 and a second lower screw 704, the first lower screw 703 and the second lower screw 704 are coaxially connected, the thread directions of the first lower screw 703 and the second lower screw 704 are opposite, the outer sides of the first lower screw 703 and the second lower screw 704 are respectively installed with a first lower moving block 701 and a second lower moving block 705 through threads, both the first lower moving block 701 and the second lower moving block 705 are connected with the sliding seats 2, so that when the two sliding seats 2 need to move towards or away from each other, because the sliding seats 2 are in clearance fit with the sliding chute 101, and the thread directions of the first lower screw 703 and the second lower screw 704 are opposite, the lower driving screw 702 is driven to rotate by the lower rotating disc 706, the first lower moving block 701 moves outside the first lower screw 703 by using screw transmission, and the second lower moving block 705 moves outside the second lower screw 704, so that the first lower moving block 701 and the second lower moving block 705 move towards or away from each other, and the first lower moving block 701 and the second lower moving block 705 respectively drive the two sliding seats 2 to move towards or away from each other.

The height-adjusting rod 6 comprises a fixed cylinder 604, the fixed cylinder 604 is vertically arranged on the upper surface of the sliding plate 5, a vertical through groove 605 is arranged on the side wall of the fixed cylinder 604 in a penetrating way, a rotating cylinder 603 is rotatably arranged in the fixed cylinder 604, the upper end of the rotating cylinder 603 penetrates out of the fixed cylinder 604 and is provided with a rotating nut 602, a lifting screw 601 is arranged in the rotating nut 602 through threads, the upper end of the lifting screw 601 penetrates out of the rotating nut 602 and is connected with the supporting plate 9, the bottom end of the lifting screw 601 extends into the fixed cylinder 604 and is provided with a sliding rod 606, and the sliding rod 606 is in clearance fit with the through groove 605, so that when the height of the height-adjusting rod 6 needs to be adjusted, the rotating cylinder 603 is rotatably arranged in the fixed cylinder 604, the rotation of the rotating nut 602 is convenient to realize, and the sliding rod 606 is in clearance fit with, when the height adjustment is performed, the turning nut 602 is rotated, and the lifting screw 601 is raised or lowered inside the turning nut 602 by screw transmission, so that the height adjustment rod 6 is extended or shortened, thereby achieving height adjustment of the height adjustment rod 6.

The surface of the bearing plate 1 is provided with a plurality of locking holes 103, the locking holes 103 are uniformly distributed along the length direction of the fixing groove 102, the locking assembly 8 comprises a fixing plate 803, the fixing plate 803 is installed at the outer side of the fixing cylinder 604, a guide hole 804 penetrates through the surface of the fixing plate 803, the guide hole 804 corresponds to the locking hole 103, a locking shaft 807 is installed inside the guide hole 804 in a sliding manner, the upper end of the locking shaft 807 penetrates through the guide hole 804 and is provided with a pull plate 802, the bottom end of the locking shaft 807 penetrates through the guide hole 804 and extends towards the locking hole 103, a locking spring 805 and a pressing plate 806 are installed outside the locking shaft 807, the pressing plate 806 is located between the fixing plate 803 and the bearing plate 1, the locking spring 805 is located between the fixing plate 803 and the pressing plate 806, and the locking shaft 807 is arranged to slide upwards inside the guide hole 804 by overcoming the elasticity of the locking spring 805 when the locking fastening of the, until the bottom end of the locking shaft 807 is separated from the locking hole 103, the locking and fixing of the height-adjusting rod 6 are released; when the height adjusting rod 6 needs to be locked, the locking shaft 807 and the locking hole 103 are coaxial, the pulling plate 802 is loosened, the locking spring 805 pushes the pressing plate 806 to move downwards under the action of elasticity of the locking spring, the bottom end of the locking shaft 807 extends into the locking hole 103, and the locking and fixing of the height adjusting rod 6 are completed.

The pull plate 802 is provided with a pull ring 801 at the upper end, so that the pull plate 802 can be conveniently pulled to move through the pull ring 801.

The upper driving assembly 10 comprises an upper driving screw 1002, the upper driving screw 1002 is rotatably installed inside the guide groove 901, either end of the upper driving screw 1002 penetrates through the support plate 9 and is provided with an upper rotary disc 1006, the upper driving screw 1002 comprises a first upper screw 1001 and a second upper screw 1004, the first upper screw 1001 and the second upper screw 1004 are coaxially connected, the screw thread directions of the first upper screw 1001 and the second upper screw 1004 are opposite, a first upper moving block 1003 and a second upper moving block 1005 are respectively installed on the outer sides of the first upper screw 1001 and the second upper screw 1004 through screw threads, the first upper moving block 1003 and the second upper moving block 1005 are both connected with the guide blocks 11, so that when the two guide blocks 11 are required to move towards or away from each other, the upper driving screw 1002 is driven to rotate through the upper rotary disc 1006 due to the clearance fit between the guide blocks 11 and the guide groove 901, and the screw thread directions of the first upper screw 1001 and the second upper screw 1004 are opposite, the first upper moving block 1003 moves outside the first upper screw 1001 through screw transmission, the second upper moving block 1005 moves outside the second upper screw 1004, so that the first upper moving block 1003 and the second upper moving block 1005 move towards or away from each other, and the two guide blocks 11 are driven to move towards or away from each other through the first upper moving block 1003 and the second upper moving block 1005 respectively.

The surface of the clamping inner core 13 far away from the profiling surface 1302 is provided with an inserting block 1301, the opposite surfaces of the two vertical plates 12 are provided with inserting grooves 1201, the sections of the inserting grooves 1201 and the inserting blocks 1301 are both dovetail-shaped, and are in clearance fit for realizing inserting fit of the clamping inner core 13 and the vertical plates 12, so that the inserting blocks 1301 can be inserted into the inserting grooves 1201, namely detachable connection between the clamping inner core 13 and the vertical plates 12 is realized, and the clamping inner core 13 is convenient to fix and replace.

By adopting the structure, when the device is used, the bearing plate 1 is arranged on the surface of a machine tool workbench through a bolt, the camshaft is transferred between the two fixed centers 4, the lower driving assembly 7 drives the two sliding seats 2 to slide in the sliding groove 101 in opposite directions, the two supporting rods 3 drive the two fixed centers 4 to move in opposite directions, and the two ends of the camshaft are clamped and fixed through the two fixed centers 4; the locking of the locking component 8 to the height adjusting rod 6 is released, the height adjusting rod 6 is moved, the supporting plate 9 is driven to move by the height adjusting rod 6 under the guiding of the sliding plate 5 and the fixing groove 102, when the clamping inner core 13 and the cam on the cam shaft are positioned on the same vertical plane, the height adjusting rod 6 is locked and fixed by the locking component 8, the height of the height adjusting rod 6 is adjusted, the height adjusting rod 6 drives the supporting plate 9 to lift, when the upper surface of the supporting plate 9 is contacted with the lower end of the cam, the cam corresponds to the profiling surface 1302, the two guide blocks 11 are driven to move in opposite directions by the upper driving component 10, so that the vertical plate 12 drives the clamping inner core 13 to approach to the cam, the profiling surface 1302 is contacted with the outer circular surface of the cam, the clamping and fixing of the cam are realized by the profiling surface 1302, the processing of the key slot of the cam shaft is convenient, and the clamping inner core, when the camshaft with different models is processed, only the clamping inner core 13 needs to be disassembled and replaced, the whole clamp does not need to be disassembled, and the operation is simpler; the device can realize the position control of fixed top 4, satisfies the fixed of different length camshafts, can cooperate through heightening pole 6 and tight inner core 13 of clamp to press from both sides tight fixedly to the cam on the camshaft, guarantees the machining precision of camshaft, presss from both sides tight inner core 13 simultaneously and can change, when having guaranteed camshaft machining precision, can satisfy the processing demand of more models camshaft, is fit for the small batch processing of camshaft.

The above embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention, and all should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a processing positioner of camshaft which characterized in that: the camshaft clamping device comprises a bearing plate (1), wherein a sliding groove (101) is formed in the upper surface of the bearing plate (1), two sliding seats (2) are slidably mounted in the sliding groove (101), the sliding seats (2) are in clearance fit with the sliding groove (101), a lower driving assembly (7) used for driving the two sliding seats (2) to move in the opposite direction or the opposite direction simultaneously is mounted in the sliding groove (101), a vertical supporting rod (3) is mounted on the upper surface of the sliding seat (2), a fixed tip (4) is mounted at the upper end of the supporting rod (3), and the tips of the two fixed tips (4) are opposite to each other and used for clamping and fixing the camshaft in the length direction;

fixing grooves (102) are formed in two side walls of the sliding groove (101) in the width direction, the fixing grooves (102) extend along the length direction of the sliding groove (101), sliding plates (5) are slidably mounted in the two fixing grooves (102), the sliding plates (5) are in clearance fit with the two fixing grooves (102), the sliding plates (5) are located between the two sliding seats (2), a height adjusting rod (6) is mounted on the upper surface of each sliding plate (5), and a locking assembly (8) used for locking the position of each height adjusting rod (6) is mounted on the outer side of each height adjusting rod (6);

the upper end of the height-adjusting rod (6) penetrates out of the bearing plate (1) and is provided with a horizontal supporting plate (9), the upper surface of the supporting plate (9) is provided with a guide groove (901), the guide groove (901) extends along the width direction of the sliding groove (101), two guide blocks (11) are slidably mounted in the guide groove (901), the guide blocks (11) are in clearance fit with the guide groove (901), an upper driving assembly (10) for driving the two guide blocks (11) to move towards or away from each other simultaneously is arranged in the guide groove (901), vertical plates (12) are mounted on the upper surface of the guide block (11), clamping inner cores (13) are detachably mounted on the opposite surfaces of the two vertical plates (12), and the opposite surfaces of the two clamping inner cores (13) are profiling surfaces (1302) matched with cam surfaces and used for clamping and fixing cams on a cam shaft.

2. The machining positioning device for the camshaft according to claim 1, wherein: the lower driving component (7) comprises a lower driving screw rod (702), the lower driving screw rod (702) is rotatably installed inside the sliding chute (101), either end of the lower driving screw rod (702) penetrates out of the sliding chute (101), and a lower rotary table (706) is installed, the lower driving screw (702) comprises a first lower screw (703) and a second lower screw (704), the first lower screw rod (703) is coaxially connected with the second lower screw rod (704), and the thread directions of the first lower screw rod (703) and the second lower screw rod (704) are opposite, a first lower moving block (701) and a second lower moving block (705) are respectively arranged on the outer sides of the first lower screw rod (703) and the second lower screw rod (704) through threads, the first lower moving block (701) and the second lower moving block (705) are both connected with the sliding seat (2).

3. The machining positioning device for the camshaft according to claim 1, wherein: heightening pole (6) are including fixed barrel (604), fixed barrel (604) are vertical to be installed sliding plate (5) upper surface, fixed barrel (604) lateral wall runs through and is provided with vertical logical groove (605), fixed barrel (604) internal rotation installs and rotates a section of thick bamboo (603), the upper end of rotating a section of thick bamboo (603) is worn out fixed barrel (604), and installs and rotate nut (602), it installs lifting screw (601) to rotate nut (602) inside through the screw thread, lifting screw (601) upper end is worn out rotation nut (602), and with backup pad (9) are connected, lifting screw (601) bottom stretches into inside fixed barrel (604), and installs slide bar (606), slide bar (606) with lead to groove (605) clearance fit.

4. The machining positioning device for the camshaft according to claim 1, wherein: the surface of the bearing plate (1) is provided with a plurality of locking holes (103), the locking holes (103) are uniformly distributed along the length direction of the fixing groove (102), the locking assembly (8) comprises a fixing plate (803), the fixing plate (803) is installed on the outer side of the fixing barrel (604), a guide hole (804) penetrates through the surface of the fixing plate (803), the guide hole (804) corresponds to the locking holes (103), a locking shaft (807) is installed inside the guide hole (804) in a sliding mode, the upper end of the locking shaft (807) penetrates out of the guide hole (804) and is provided with a pulling plate (802), the bottom end of the locking shaft (807) penetrates out of the guide hole (804) and extends towards the locking holes (103), a locking spring (805) and a pressing plate (806) are installed on the outer side of the locking shaft (807), and the pressing plate (806) is located between the fixing plate (803) and the bearing plate (1), the locking spring (805) is located between the fixing plate (803) and the pressing plate (806).

5. The machining positioning device for the camshaft according to claim 4, wherein: and a pull ring (801) is installed at the upper end of the pull plate (802).

6. The machining positioning device for the camshaft according to claim 1, wherein: the upper driving assembly (10) comprises an upper driving screw rod (1002), the upper driving screw rod (1002) is rotatably installed inside the guide groove (901), either end of the upper driving screw rod (1002) penetrates through the supporting plate (9), and is provided with an upper rotating disc (1006), the upper driving screw (1002) comprises a first upper screw (1001) and a second upper screw (1004), the first upper screw (1001) and the second upper screw (1004) are coaxially connected, and the thread directions of the first upper screw rod (1001) and the second upper screw rod (1004) are opposite, a first upper moving block (1003) and a second upper moving block (1005) are respectively arranged on the outer sides of the first upper screw rod (1001) and the second upper screw rod (1004) through threads, the first upper moving block (1003) and the second upper moving block (1005) are connected to the guide block (11).

7. The machining positioning device for the camshaft according to claim 1, wherein: the surface, far away from the profiling surface (1302), of the clamping inner core (13) is provided with an inserting block (1301), the opposite surfaces of the two vertical plates (12) are provided with inserting grooves (1201), the sections of the inserting grooves (1201) and the inserting blocks (1301) are both in a dovetail shape, and are in clearance fit, so that the inserting fit of the clamping inner core (13) and the vertical plates (12) is realized.