CN219169407U

CN219169407U - Diameter expanding device for assembled camshaft

Info

Publication number: CN219169407U
Application number: CN202223390614.4U
Authority: CN
Inventors: 姚立; 罗力成; 陈永龙; 史栎
Original assignee: Ningbo Shenglong Zhizao Camshaft Co ltd
Current assignee: Ningbo Shenglong Zhizao Camshaft Co ltd
Priority date: 2022-12-16
Filing date: 2022-12-16
Publication date: 2023-06-13
Anticipated expiration: 2032-12-16

Abstract

The utility model belongs to the technical field of mechanical expanding, and provides an expanding device for an assembled camshaft, which comprises: the columnar pressure head comprises a loading area, an extrusion area and a guide area which are connected in sequence, wherein the loading area is used for loading load, the pressure head is driven to axially move and rotate by the load, a plurality of raised guide rails are uniformly distributed on the extrusion area in the circumferential direction, the extrusion area is conical, and the diameter of the extrusion area is gradually reduced from one end close to the loading area to one end close to the guide area; the expanding ring comprises a plurality of expanding blocks, gaps are reserved among the expanding blocks, the inner peripheral surface of the expanding blocks is set to be a conical surface corresponding to the extrusion area, the inner diameter of the expanding blocks gradually decreases from one end close to the pressure head to one end close to the ejector rod, and guide grooves are formed in the inner peripheral wall of the expanding blocks corresponding to the guide rails. Compared with the prior art, the utility model has the advantages that: the pressure head drives the expanding ring to synchronously rotate in the expanding process, so that the expanding is more uniform.

Description

Diameter expanding device for assembled camshaft

Technical Field

The utility model belongs to the technical field of mechanical expanding, and particularly relates to an expanding device for an assembled camshaft.

Background

In the assembly process of the assembled camshaft, the steel pipe is usually required to be partially expanded, and then the cam sheet is pressed to form a tight interference fit after the expansion, so that the assembly is completed. As shown in fig. 7 and 8, in the conventional camshaft diameter expanding device, the die 21 in the steel pipe 22 is pressed by the punch 20, so as to expand the diameter of the steel pipe 22, the die 21 used in the diameter expansion is usually formed by a plurality of valves 23 and is placed in a circular shape in the place where the diameter expansion is required in the steel pipe 22, gaps are formed between the valves 23, and each valve 23 moves to the side far away from the center along the radial direction of the circular pipe in the diameter expansion process, so that the diameter expansion is realized. However, since the valves 23 have gaps, the steel tube 22 at the corresponding position of the gaps of the valves 23 cannot be stressed in the diameter expanding process, so that the diameter expansion is uneven.

Disclosure of Invention

The utility model aims to provide a diameter expanding device for an assembled camshaft, which drives a diameter expanding ring to rotate simultaneously in the diameter expanding process by matching a guide rail on an extrusion area of a pressure head with a guide groove on a diameter expanding block, so that the diameter is expanded more uniformly.

The technical scheme adopted for solving the technical problems is as follows: there is provided an expanding device for an assembled camshaft, comprising: the columnar pressure head comprises a loading area, an extrusion area and a guide area which are sequentially connected, wherein the diameters of the loading area, the extrusion area and the guide area are sequentially reduced, the loading area is used for loading load, the pressure head is driven to axially move and rotate by the load, a plurality of raised guide rails are uniformly distributed on the extrusion area in the circumferential direction, the extrusion area is conical, and the diameter of the extrusion area is gradually reduced from one end close to the loading area to one end close to the guide area;

the expanding ring comprises a plurality of expanding blocks, the expanding blocks are sequentially arranged in the circumferential direction to form the expanding ring, gaps are reserved among the expanding blocks, the inner circumferential surfaces of the expanding blocks are arranged to be conical surfaces corresponding to the extrusion areas, the inner diameters of the expanding blocks gradually decrease from one end close to the pressure head to one end far away from the pressure head, and guide grooves are arranged on the inner circumferential walls of the expanding blocks corresponding to the guide rails;

the cylindrical ejector rod is movably connected with the diameter expansion block at one end of the ejector rod, the diameter expansion block can radially move relative to one end of the ejector rod, a guide groove matched with the guide area is formed in one end of the ejector rod connected with the diameter expansion ring, and the guide area is inserted into the guide groove.

Compared with the prior art, the utility model has the advantages that: when the expanding device is used, each expanding block is connected to the ejector rod, the expanding blocks are connected to one end of the ejector rod to form an expanding ring, then the ejector rod and the expanding ring at one end of the ejector rod are placed in the cam shaft, the positions of the expanding ring correspond to the positions of the cam shaft to be expanded, the ejector rod is arranged on the workbench, the pressure head stretches into the cam shaft from the other end of the cam shaft, the pressure head is driven to axially move by load, a guide area at one end of the pressure head stretches into the expanding ring, at the moment, the load drives the pressure head to rotate, a guide rail at the extrusion area is matched with a guide groove on the expanding block, then the load drives the pressure head to rotate while transversely moving along the guide groove on the expanding block, the conical extrusion area enables the expanding block to move along the clamping block to be far away from the round side, the expanding of the supporting wheel shaft is realized, meanwhile, the load drives the pressure head to rotate simultaneously through the matching of the guide rail and the guide groove on the extrusion area, and the expanding ring is more uniformly stressed, and the gap on the expanding ring is avoided. Therefore, the expanding device drives the expanding ring to synchronously rotate in the expanding process by the pressure head, so that the expanding is more uniform.

In the above-mentioned a hole enlargement device for assembled camshaft, the hole enlargement piece with be equipped with the draw-in groove on the terminal surface that the ejector pin links to each other, the draw-in groove extends along radial, the ejector pin with correspond on the terminal surface that the hole enlargement ring links to each other the draw-in groove is equipped with a plurality of fixture blocks, the fixture block is followed the circumference interval equipartition of ejector pin, the draw-in groove with fixture block sliding fit. . The clamping connection of clamping block on clamping groove and the ejector pin is passed through to the expanding piece to connect on the ejector pin, at the expanding in-process, the ejector pin passes through the bearing and connects on the workstation, and the ejector pin can not relative workstation axial displacement, plays the restriction effect to the lateral shifting of pressure head, and when pressure head axial displacement, the radial removal in circular one side was kept away from to extrusion expanding piece, the radial outwards removal of clamping groove on the expanding piece along the clamping block realized the expanding, and when the pressure head passed through the cooperation of clamping groove and ejector pin clamping block when the guide rail drive expanding piece rotated, the expanding piece drove the ejector pin and rotates together relative workstation.

In the above-mentioned expanding device for assembled camshaft, the circumference is equipped with the spread groove on the peripheral wall of expanding the piece, every link to each other between the spread groove forms the go-between, be equipped with the elastic ring in the go-between, the elastic ring is used for connecting to tighten up expanding the piece. When the expanding block is connected to one end of the ejector rod through the clamping groove and the clamping block on the ejector rod in a clamping mode, the expanding block forms an expanding ring to be connected to one end of the ejector rod, the connecting groove on the expanding block is connected to form a connecting ring, and then the elastic ring is connected to the connecting ring, so that the expanding ring is stably connected to one end of the ejector rod, and the ejector rod is convenient to drive the expanding ring to be placed in the cam shaft. The elastic ring is connected with each expanding block, and after expanding, the expanding blocks can be conveniently restored to the original positions under the action of the elastic ring.

In the above-mentioned expanding device for assembled camshaft, the elastic ring is a rubber elastic ring, and is simple and easy to obtain.

In the above-mentioned a hole enlargement device for assembled camshaft, the guide rail is followed the axial extension of extrusion district, the guide slot is followed the internal perisporium axial extension of hole enlargement piece reaches the both ends of the internal perisporium of hole enlargement piece, the guide slot with the draw-in groove is linked together, and convenient processing also makes things convenient for the hole enlargement piece to radially move under the effect of extrusion district.

In the above-mentioned a hole enlargement device for assembled camshaft, the quantity of hole enlargement piece is three, and three hole enlargement pieces form the ring that expands, and processing is convenient, can guarantee moreover that the hole enlargement is even.

Drawings

FIG. 1 is a schematic illustration of the use of one embodiment of the present utility model;

FIG. 2 is a schematic overall structure of an embodiment of the present utility model;

FIG. 3 is a schematic view of the structure of a ram according to one embodiment of the utility model;

FIG. 4 is a schematic view of a diameter-expanding ring according to an embodiment of the present utility model;

FIG. 5 is a schematic diagram showing a second structure of an expanding ring according to an embodiment of the present utility model;

FIG. 6 is a schematic view showing the structure of a jack according to one embodiment of the present utility model;

FIG. 7 is a schematic diagram of a prior art expanding device;

fig. 8 is a schematic diagram of a prior art expanding device.

In the figure, 1, a pressure head; 2. a loading area; 3. an extrusion zone; 4. a guide region; 5. a guide rail; 6. an expanding ring; 7. a diameter expanding block; 8. a gap; 9. a conical surface; 10. a guide groove; 11. a push rod; 12. a guide groove; 13. a clamping groove; 14. a clamping block; 15. a connecting groove; 16. a connecting ring; 17. an elastic ring; 18. a cam shaft; 19. a cam plate; 20. a punch; 21. a mold; 22. a steel pipe; 23. a valve.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

As shown in fig. 1 to 6, the present utility model provides an expanding device for an assembled camshaft, comprising: comprising the following steps: the columnar pressure head 1 comprises a loading area 2, an extrusion area 3 and a guide area 4 which are sequentially connected, wherein the diameters of the loading area 2, the extrusion area 3 and the guide area 4 are sequentially reduced, the loading area 2 is used for loading load, the pressure head 1 is driven by the load to axially move and rotate, a plurality of raised guide rails 5 are uniformly distributed on the extrusion area 3 in the circumferential direction, the extrusion area 3 is conical, and the diameter of the extrusion area 3 is gradually reduced from one end close to the loading area 2 to one end close to the guide area 4; the expanding ring 6 comprises a plurality of expanding blocks 7, the expanding blocks 7 are sequentially arranged in the circumferential direction to form the expanding ring 6, gaps 8 are reserved among the expanding blocks 7, the inner circumferential surface of the expanding blocks 7 is provided with conical surfaces 9 corresponding to the extrusion areas 3, the inner diameter of the expanding blocks 7 is gradually reduced from one end close to the pressure head 1 to one end far away from the pressure head 1, and guide grooves 10 are formed in the inner circumferential wall of the expanding blocks 7 corresponding to the guide rails 5; the cylindrical ejector rod 11, the expanding block 7 is movably connected at one end of the ejector rod 11, the expanding block 7 can radially move relative to one end of the ejector rod 11, one end of the ejector rod 11 connected with the expanding ring 6 is provided with a guide groove 12 matched with the guide area 4, and the guide area 4 is inserted into the guide groove 12.

Further, the end surface of the expanding block 7 connected with the ejector rod 11 is provided with a clamping groove 13, the clamping groove 13 extends along the radial direction, the end surface of the ejector rod 11 connected with the expanding ring 6 is provided with a plurality of clamping blocks 14 corresponding to the clamping groove 13, the clamping blocks 14 are uniformly distributed along the circumferential direction of the ejector rod 11 at intervals, and the clamping groove 13 is in sliding fit with the clamping blocks 14. The expanding block 7 is connected to the ejector rod 11 through the clamping grooves 13 and the clamping blocks 14 on the ejector rod 11, in the expanding process, the ejector rod 11 is connected to the workbench through a bearing, the ejector rod 11 cannot axially move relative to the workbench, a constraint effect is achieved on the transverse movement of the pressing head 1, when the pressing head 1 axially moves, the expanding block 7 is extruded to radially move away from one side of a circle, the clamping grooves 13 on the expanding block 7 radially outwards move along the clamping blocks 14 to realize expanding, and when the pressing head 1 drives the expanding block 7 to rotate through the guide rail 5, the expanding block 7 drives the ejector rod 11 to rotate relative to the workbench through the matching of the clamping grooves 13 and the clamping blocks 14 of the ejector rod 11.

Further, connecting grooves 15 are formed in the peripheral wall of the expanding block 7 along the circumferential direction, connecting rings 16 are formed by connecting the connecting grooves 15, elastic rings 17 are arranged in the connecting rings 16, and the elastic rings 17 are used for connecting the tightening expanding block 7. When the expanding block 7 is connected to one end of the ejector rod 11 through the clamping groove 13 and the clamping block 14 on the ejector rod 11 in a clamping way, the expanding block 7 forms an expanding ring 6 to be connected to one end of the ejector rod 11, the connecting groove 15 on the expanding block 7 is connected to form a connecting ring 16, and then the elastic ring 17 is connected to the connecting ring 16, so that the expanding ring 6 is stably connected to one end of the ejector rod 11, and the ejector rod 11 is convenient to drive the expanding ring 6 to be placed in the cam shaft 18. The elastic ring 17 is connected with each expanding block 7, and after expanding, the expanding blocks 7 can be conveniently restored to the original positions under the action of the elastic ring 17.

Preferably, the elastic ring 17 is a rubber elastic ring, which is simple and easy to obtain.

Preferably, the guide rail 5 extends along the axial direction of the extrusion area 3, the guide groove 10 extends along the axial direction of the inner peripheral wall of the expanding block 7 to the two ends of the inner peripheral wall of the expanding block 7, the guide groove 10 is communicated with the clamping groove 13, and the radial movement of the expanding block 7 under the action of the extrusion area 3 is convenient for processing.

Preferably, the number of the expanding blocks 7 is three, and the three expanding blocks 7 form a warp expanding ring, so that the processing is convenient, and the uniform expanding can be ensured.

Working principle: when in use, the cam plate 19 is firstly arranged on the riding wheel shaft, and then the diameter of the cam shaft 18 is enlarged at the position where the cam plate 19 is arranged, so that the cam shaft 18 is tightly matched with the cam plate 19. During expanding, each expanding block 7 is firstly connected to the ejector rod 11, a plurality of expanding blocks 7 are connected to one end of the ejector rod 11 to form an expanding ring 6, then the ejector rod 11 and the expanding ring 6 at one end of the ejector rod 11 are placed in the cam shaft 18, the position of the expanding ring 6 corresponds to the position of the cam shaft 18 to be expanded, the ejector rod 11 is arranged on a workbench, then the pressure head 1 stretches into the other end of the cam shaft 18, the pressure head 1 is driven to axially move by load, the guide area 4 at one end of the pressure head 1 stretches into the expanding ring 6, at the moment, the load drives the pressure head 1 to rotate, the guide rail 5 at the extrusion area 3 is matched with the guide groove 10 on the expanding block 7, then the load drives the pressure head 1 to rotate while transversely moving, the guide rail 5 on the extrusion area 3 moves along the guide groove 10 on the expanding block 7, the tapered extrusion area 3 enables the expanding block 7 to move along the clamping block 14 to be far away from the round side, the expanding of the supporting wheel shaft is realized, meanwhile, the pressure head 1 is driven to rotate in the expanding process, the pressure head 1 is driven to rotate by load, the guide area 4 at the moment, the guide rail 5 at the extrusion area 3 is matched with the guide groove 10 on the expanding block 6, and the gap of the guide groove 6 is not uniformly matched with the guide groove 8 is prevented from rotating. Therefore, the expanding device drives the expanding ring 6 to synchronously rotate in the expanding process through the pressure head 1, so that the expanding is more uniform.

The specific embodiments described herein are offered by way of example only. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the scope of the utility model as defined.

Claims

1. An expanding device for an assembled camshaft, comprising:

the columnar pressure head (1) comprises a loading area (2), an extrusion area (3) and a guide area (4) which are sequentially connected, wherein the diameters of the loading area (2), the extrusion area (3) and the guide area (4) are sequentially reduced, the loading area (2) is used for loading loads, the pressure head (1) is driven to axially move and rotate through the loads, a plurality of raised guide rails (5) are uniformly distributed on the extrusion area (3) in the circumferential direction, the extrusion area (3) is conical, and the diameter of the extrusion area (3) is gradually reduced from one end close to the loading area (2) to one end close to the guide area (4);

the expanding ring (6) comprises a plurality of expanding blocks (7), the expanding blocks (7) are sequentially arranged in the circumferential direction to form the expanding ring (6), gaps (8) are reserved among the expanding blocks (7), the inner circumferential surface of the expanding blocks (7) is set to be a conical surface (9) corresponding to the extrusion area (3), the inner diameter of the expanding blocks (7) is gradually reduced from one end close to the pressure head (1) to one end far away from the pressure head (1), and guide grooves (10) are formed in the inner circumferential wall of the expanding blocks (7) corresponding to the guide rails (5);

the diameter-enlarging block (7) is movably connected to one end of the ejector rod (11), the diameter-enlarging block (7) can radially move relative to one end of the ejector rod (11), one end of the ejector rod (11) connected with the diameter-enlarging ring (6) is provided with a guide groove (12) matched with the guide area (4), and the guide area (4) is inserted into the guide groove (12).

2. The expanding device for the assembled camshaft according to claim 1, wherein the end surface of the expanding block (7) connected with the ejector rod (11) is provided with a clamping groove (13), the clamping groove (13) extends along the radial direction, the end surface of the ejector rod (11) connected with the expanding ring (6) is provided with a plurality of clamping blocks (14) corresponding to the clamping groove (13), the clamping blocks (14) are uniformly distributed along the circumferential direction of the ejector rod (11) at intervals, and the clamping groove (13) is in sliding fit with the clamping blocks (14).

3. The expanding device for the assembled camshaft according to claim 2, wherein connecting grooves (15) are formed in the peripheral wall of the expanding block (7) along the circumferential direction, each connecting groove (15) is connected to form a connecting ring (16), an elastic ring (17) is arranged in the connecting ring (16), and the elastic ring (17) is used for connecting and tightening the expanding block (7).

4. A diameter-enlarging device for assembled camshafts according to claim 3, characterized in that the elastic ring (17) is a rubber elastic ring.

5. A diameter-enlarging device for assembled camshaft according to claim 2, wherein the guide rail (5) extends along the axial direction of the pressing area (3), the guide groove (10) extends along the inner peripheral wall of the diameter-enlarging block (7) to both ends of the inner peripheral wall of the diameter-enlarging block (7), and the guide groove (10) communicates with the clamping groove (13).

6. A diameter-enlarging device for assembled camshafts according to claim 1, characterized in that the number of diameter-enlarging blocks (7) is three.