CN111136597B - A camshaft axial positioning device - Google Patents
A camshaft axial positioning device Download PDFInfo
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- CN111136597B CN111136597B CN201911377696.9A CN201911377696A CN111136597B CN 111136597 B CN111136597 B CN 111136597B CN 201911377696 A CN201911377696 A CN 201911377696A CN 111136597 B CN111136597 B CN 111136597B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/08—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness for measuring thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
- G01B5/0004—Supports
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Abstract
本发明公开了一种凸轮轴轴向定位装置，包括定位头、基座组件、限位支架、第一弹簧、连接组件和与凸轮轴大端的销孔配合的定位销，定位头的中心具有与凸轮轴大端的顶针孔配合的顶针，定位销安装在连接组件上，连接组件安装在定位头上且与基座组件配合，能实现定位销沿定位头径向相对于顶针的移动/复位，限位支架与定位头、基座组件配合，第一弹簧位于定位头与基座组件之间，且一端与定位头抵靠、另一端与基座组件抵靠，定位头能沿轴向相对于基座组件移动/复位，限位支架能限制定位头复位时定位头与基座组件的相对位置。采用本发明能在定位两种不同型号的凸轮轴时，避免进行更换，提高生产效率。
The invention discloses a camshaft axial positioning device, comprising a positioning head, a base assembly, a limit bracket, a first spring, a connecting assembly and a positioning pin matched with a pin hole of the big end of the camshaft. The thimble is matched with the thimble hole of the big end of the camshaft. The positioning pin is installed on the connecting assembly, and the connecting assembly is installed on the positioning head and cooperates with the base assembly, which can realize the movement/reset of the positioning pin relative to the thimble along the radial direction of the positioning head. The limit bracket cooperates with the positioning head and the base assembly, the first spring is located between the positioning head and the base assembly, one end abuts the positioning head, and the other end abuts the base assembly, and the positioning head can be axially relative to the base assembly. The base assembly moves/resets, and the limit bracket can limit the relative position of the positioning head and the base assembly when the positioning head is reset. By adopting the present invention, when two different types of camshafts are positioned, replacement can be avoided, and the production efficiency can be improved.
Description
Technical Field
The invention belongs to the field of camshaft assembly, and particularly relates to an axial positioning device of a camshaft.
Background
The existing axial positioning device for the camshaft comprises a positioning head and a positioning pin fixed on the positioning head, wherein a thimble matched with a thimble hole at the large end of the camshaft is arranged at the center of the positioning head, the positioning pin can be matched with a pinhole at the large end of the camshaft, and the positions of the thimble and the positioning pin are kept constant. The EA series engine adopts a mechanical tappet, the height difference between a base circle and a journal of a camshaft needs to be measured before the tappet is selected (namely, the tappet is grouped), and the test method comprises the following steps: the existing thimble positioning assembly is used for positioning the small end of the camshaft (see the left end of the camshaft in figures 1 and 2), the axial positioning device is used for positioning the large end of the camshaft (see the right end of the camshaft in figures 1 and 2), the thimble of the axial positioning device is inserted into the thimble hole of the large end of the camshaft, the positioning pin is inserted into the pin hole of the large end of the camshaft, the probe is respectively contacted with the base circle and the shaft neck, the axial positioning device rotates, the camshaft is driven to rotate through the positioning pin, and the data of all the base circles and the shaft neck can be obtained after the camshaft rotates for two circles. The intake camshaft of EA series engine has two types, as shown in fig. 1 and fig. 2, the two types of camshaft have different lengths (i.e. A ≠ B), the distance from the center of the pinhole at the big end of the two types of camshaft to the center of the pinhole at the top is also different (i.e. a ≠ B), the axial positioning device needs to be replaced when the production line changes the type every time, the axial positioning device is changed once every 2 days on average and once for 30 minutes, the productivity is seriously affected, and the production efficiency is low.
Disclosure of Invention
The invention aims to provide an axial positioning device of a camshaft, which is used for avoiding replacement and improving the production efficiency when two camshafts of different types are positioned.
The invention relates to an axial positioning device of a camshaft, which comprises a positioning head, a base component, a limiting support, a first spring, a connecting component and a positioning pin matched with a pin hole at the large end of the camshaft, wherein the center of the positioning head is provided with a thimble matched with a thimble hole at the large end of the camshaft, the positioning pin is arranged on the connecting component, the connecting component is arranged on the positioning head and matched with the base component, so that the positioning pin can move/reset relative to the thimble along the radial direction of the positioning head, the limiting support is matched with the positioning head and the base component, the first spring is positioned between the positioning head and the base component, one end of the first spring is abutted against the positioning head, the other end of the first spring is abutted against the base component, the positioning head can move/reset relative to the base component along the axial direction, and the limiting support can limit the.
Preferably, one end of the positioning pin is provided with a baffle plate; the connecting assembly comprises a connecting seat, a second spring, a third spring and a T-shaped pin sleeve, wherein the third spring is vertically fixed on the side wall of the connecting seat, one end of the connecting seat is provided with a first blind hole, the other end of the connecting seat is provided with a wedge-shaped inclined plane, the center of the pin sleeve is provided with a stepped hole, the aperture of a small hole of the stepped hole is matched with the diameter of a positioning pin, the aperture of a large hole is matched with the diameter of a baffle plate, the vertical part of the pin sleeve is fixedly connected with the first blind hole, the horizontal part of the pin sleeve is positioned outside the first blind hole, the positioning pin passes through the small hole of the stepped hole and extends out of the pin sleeve, the baffle plate is abutted against the step end face in the stepped hole, one part of the second spring is positioned in the first blind hole and abutted against the bottom face of the; the side wall of the positioning head is provided with an assembly mounting groove capable of accommodating the connecting assembly along the axial direction, and a third spring mounting hole is formed in the assembly mounting groove along the radial direction of the positioning head; the base component comprises a base and a wedge-shaped boss which is arranged on the base and has the same inclination angle with the wedge-shaped inclined plane; one part of the third spring is installed in the third spring installation hole, the other part of the third spring and the connecting seat are located in the component installation groove, the component cover plate fixedly connected to the notch of the component installation groove is limited, the positioning pin protrudes out of the top surface of the positioning head and is parallel to the axis of the positioning head, and the wedge-shaped inclined surface is in contact fit with the wedge-shaped boss, so that the positioning pin can move/reset relative to the ejector pin along the radial direction of the positioning head, and the purpose that the position of the positioning pin relative to the ejector pin is adjustable is achieved.
Preferably, the base component further comprises a steel ball cover plate and N steel balls, the steel ball cover plate is provided with N steel ball holes with the diameter smaller than that of the steel balls, and the back of the steel ball cover plate is provided with a bulge; the wedge-shaped surface of the wedge-shaped boss is provided with N hemispherical grooves, N steel balls are respectively arranged in the N hemispherical grooves, a steel ball cover plate covers the N steel balls and is supported and fixedly connected to the wedge-shaped boss through a protrusion, the N steel balls correspond to the N steel ball holes, and the steel balls can rotate in the hemispherical grooves and partially protrude out of the steel ball holes; the part of the steel ball protruding out of the steel ball hole is in contact with the wedge-shaped inclined plane. When the positioning pin and the connecting seat move, the wedge-shaped inclined surface is contacted with the steel ball, so that friction is reduced, and the positioning pin and the connecting seat move more smoothly.
Preferably, the lateral wall symmetry of connecting seat is provided with two sliders, a spout has been seted up respectively along the locating head radial in the both sides of subassembly mounting groove, and two sliders are located two spouts respectively and can slide along the spout. The slider cooperates with the spout and carries on spacingly to the connecting seat, appears the deviation when can avoiding locating pin and connecting seat to remove.
Preferably, the limiting bracket is U-shaped; the side wall of the base is symmetrically provided with two first bracket mounting grooves along the axial direction, the two first bracket mounting grooves extend along the bottom of the base and are communicated at the center of the bottom to form a U-shaped limiting groove, and the center of the top of the base is provided with a second blind hole; two second support mounting grooves are symmetrically formed in the side wall of the positioning head along the axial direction, and a guide cylinder is arranged in the center of the bottom of the positioning head; the positioning head is right opposite to the base, the guide cylinder is inserted into the second blind hole, one part of the first spring is located in the guide cylinder and is abutted against the bottom of the positioning head, the other part of the first spring is located in the second blind hole and is abutted against the bottom surface of the second blind hole, the limiting support spans in the U-shaped limiting groove, the top two ends of the top of the bottom of the second blind hole are respectively located in the two second support mounting grooves and are fixedly connected with the positioning head, the positioning head can move/reset relative to the base along the axial direction, the limiting support can move/reset relative to the base under the driving of the positioning head, and the limiting support.
Preferably, the base component further comprises a sleeve, the sleeve is provided with an external thread, the second blind hole is provided with an internal thread, the sleeve is in threaded connection with the second blind hole, part of the sleeve protrudes out of the top surface of the base, and the guide cylinder is inserted into the sleeve and is in clearance fit with the sleeve.
Preferably, the bottom edge of the base is symmetrically provided with two connecting support lugs, and the base can be more conveniently assembled on the driving cylinder through the two connecting support lugs.
Preferably, the bottom of the limiting support is provided with a limiting circular truncated cone, the center of the bottom of the base is provided with a circular groove matched with the limiting circular truncated cone, the two first support mounting grooves are communicated through the circular groove, and when the limiting support stretches across the U-shaped limiting groove, the limiting circular truncated cone is positioned in the circular groove and is in clearance fit with the circular groove. The limiting round platform enables the limiting support to have higher strength.
Preferably, the inclination angle of the wedge-shaped slope α = arctan (a-B)/(B-a); the positioning method comprises the following steps that A represents the length of a first camshaft to be positioned, a represents the distance between the center of a thimble hole of the large end of the first camshaft to be positioned and the center of a pinhole, B represents the length of a second camshaft to be positioned, B represents the distance between the center of the thimble hole of the large end of the second camshaft to be positioned and the center of the pinhole, A is less than B, and a is greater than B.
The axial position of the ejector pin and the position of the positioning pin relative to the ejector pin can be adjusted, and when two types of camshafts are positioned, the axial positioning device does not need to be replaced, so that the influence of machine type switching on the productivity is thoroughly eliminated, and the production efficiency is improved; the invention has simple structure, reliable performance, convenient installation and use and strong practicability.
Drawings
Fig. 1 is a schematic structural view of a first camshaft.
Fig. 2 is a schematic structural view of a second camshaft.
Fig. 3 is a schematic structural diagram of the embodiment.
FIG. 4 is a schematic view of the assembly of the first spring and the base assembly according to the embodiment.
FIG. 5 is a partially exploded view of the base assembly of the embodiment.
FIG. 6 is a schematic view of the structure of the steel ball cover plate and the steel ball in the embodiment.
Fig. 7 is an isometric view of the base assembly of the example embodiment.
Fig. 8 is a schematic structural view of a limiting bracket in the embodiment.
Fig. 9 is an assembly diagram of the connection assembly and the positioning head in the embodiment.
FIG. 10 is a schematic structural diagram of the positioning head in the embodiment.
Fig. 11 is a schematic structural view of the connecting assembly in the embodiment.
Fig. 12 is an exploded view of the connecting assembly of the embodiment.
Fig. 13 is a view showing a state in which the second camshaft is positioned and the positioning pin is compressed by the large end of the camshaft.
Fig. 14 is a diagram showing a state in which the second camshaft is positioned, the positioning head and the positioning pin are compressed by the large end of the camshaft, and the positioning pin and the connecting seat are translated to the reference circle where the pin hole is located.
Fig. 15 is a view showing a state in which the positioning head is compressed by the large end of the camshaft and the positioning pin is inserted into the pin hole, for positioning the second camshaft.
Fig. 16 is a comparison diagram of the state in which the first and second camshafts are positioned.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The axial positioning device for the camshaft shown in fig. 1 to 16 comprises a positioning head 1, a positioning pin 2, a base assembly 3, a limiting bracket 4, a first spring 5 and a connecting assembly 7.
As shown in fig. 9 and 10, the center of the positioning head 1 has a thimble 11 matched with a thimble hole 61 of the large end of the camshaft, an assembly mounting groove 12 capable of accommodating the connecting assembly 7 is axially formed in the side wall of the positioning head 1, a third spring mounting hole 13 is radially formed in the assembly mounting groove 12 along the positioning head 1, a sliding groove 17 is radially formed in each of two sides of the assembly mounting groove 12 along the positioning head 1, two second support mounting grooves 15 are axially symmetrically formed in the side wall of the positioning head 1, the width of each second support mounting groove 15 is slightly larger than that of the corresponding limiting support 4, a second connecting hole 18 is formed in each second support mounting groove 15, the assembly mounting groove 12 is located between the two second support mounting grooves 15, and a guide cylinder 16 is arranged at the center of the bottom of the positioning head 1.
As shown in fig. 9, 11, and 12, positioning pin 2 can be fitted into pin hole 62 at the large end of the camshaft, and one end of positioning pin 2 has stopper plate 21. The connecting assembly 7 comprises a connecting seat 71, a second spring 72, a third spring 73 and a T-shaped pin sleeve 74, the third spring 73 is vertically welded on the side wall of the connecting seat 71, one end of the connecting seat 71 is provided with a first blind hole 711, the other end of the connecting seat 71 is provided with a wedge-shaped inclined surface 712, the first blind hole 711 is provided with internal threads, the side wall of the connecting seat 71 is symmetrically provided with two sliding blocks 75, the vertical part of the pin sleeve 74 is provided with external threads, the center of the pin sleeve 74 is provided with a stepped hole 741, the small hole diameter of the stepped hole 741 is matched with the diameter of the positioning pin 2, the large hole diameter is matched with the diameter of the baffle plate 21, the vertical part of the pin sleeve 74 is in threaded connection with the first blind hole 711, the horizontal part of the pin sleeve 74 is positioned outside the first blind hole 711, the positioning pin 2 passes through the small hole of the stepped hole 741 to extend out of the pin sleeve 74, the baffle plate 21 is abutted, the other part of the second spring 72 is located in the large hole of the stepped hole 741 and the end part abuts against the stopper 21, and the positioning pin 2 can move/return relative to the pin sleeve 74 under the elastic force of the second spring 72.
As shown in fig. 9, a part of the third spring 73 is installed in the third spring installation hole 13, the other part of the third spring 73 and the connection seat 71 are located in the assembly installation groove 12, the two sliders 75 are respectively located in the two sliding grooves 17, the connection assembly 7 is limited by the assembly cover plate 14 screwed at the groove of the assembly installation groove 12, and the positioning pin 2 protrudes out of the top surface of the positioning head 1 and is parallel to the axis of the positioning head 1.
As shown in fig. 4 to 8, the limiting bracket 4 is U-shaped, and has a first connecting hole 41 at two ends of the top and a limiting circular truncated cone 42 at the bottom. Base component 3 includes base 30, sleeve 34, set up on base 30 and the wedge boss 31 that inclination is the same with wedge inclined plane 712, a steel ball apron 32 and 24 steel balls 33, second blind hole 302 has been seted up at the top center of base 30, second blind hole 302 has the internal thread, circular slot 303 has been seted up at the bottom center of base 30, the bottom border symmetry of base 30 is provided with two connection lugs 35, two first support mounting grooves 301 have been seted up along axial symmetry to the lateral wall of base 30, two first support mounting grooves 301 extend and communicate through circular slot 303 in the bottom along the bottom of base 30, form the spacing groove of U-shaped, the width of first support mounting groove 301 slightly is greater than the width of spacing support 4, sleeve 34 has the external screw thread, sleeve 34 spiro union is in second blind hole 302. The steel ball cover plate 32 is provided with 24 steel ball holes 321 with the diameter smaller than that of the steel balls, and the back of the steel ball cover plate 32 is provided with four protrusions 322; the wedge-shaped surface of the wedge-shaped boss 31 is provided with 24 hemispherical grooves 311, 24 steel balls 33 are respectively arranged in the 24 hemispherical grooves 311, a steel ball cover plate 32 covers the 24 steel balls 33 and is supported and screwed on the wedge-shaped boss 31 through four protrusions 322, the 24 steel balls 33 correspond to the 24 steel ball holes 321, and the steel balls 33 can rotate in the hemispherical grooves 311 and partially protrude out of the steel ball holes 321. As shown in fig. 16, the inclination angle of the wedge-shaped slope 712 (i.e. the angle between the oblique line of the wedge-shaped slope 712 and the axis of the positioning head 1): α = arctan (a-B)/(B-a); the positioning method comprises the following steps that A represents the length of a first camshaft to be positioned, a represents the distance between a thimble hole and a pin hole of the large end of the first camshaft to be positioned, B represents the length of a second camshaft to be positioned, B represents the distance between the thimble hole and the pin hole of the large end of the second camshaft to be positioned, A is smaller than B, and a is larger than B.
As shown in fig. 3, the positioning head 1 faces the base 30, the guide cylinder 16 is inserted into the sleeve 34 and is in clearance fit with the sleeve 34, one part of the first spring 5 is located in the guide cylinder 16, and the end of the first spring is abutted against the bottom of the positioning head 1, the other part of the first spring 5 is located in the sleeve 34, and the end of the first spring is abutted against the bottom surface of the second blind hole 302, the limiting bracket 4 spans across the U-shaped limiting groove, the limiting circular truncated cone 42 is located in the circular groove 303 and is in clearance fit with the circular groove 303, two ends of the top of the limiting bracket 4 are respectively located in the two second bracket mounting grooves 15 and are screwed with the second connecting hole 18 through the first connecting hole 41 by screws, so that the limiting bracket 4 is fixedly connected with the positioning head 1, the part of the steel ball 33 protruding from the steel ball hole 321 contacts with the wedge-shaped inclined plane 712, the positioning head 1 can move/reset relative to the base 30 in the axial direction under the elastic force of the first, the positioning pin 2 and the connecting seat 71 can move/reset relative to the thimble 11 along the radial direction of the positioning head 1 under the elastic force of the third spring 73.
As shown in fig. 1 and fig. 2, in the present embodiment, the length of the first camshaft 6 to be positioned is a, the distance between the center of the thimble hole 61 at the large end of the first camshaft and the center of the pin hole 62 is a, the length of the second camshaft 6 to be positioned is B, the distance between the center of the thimble hole 61 at the large end of the second camshaft and the center of the pin hole 62 is B, a < B, and a > B.
If the height difference between the base circle and the journal of the first camshaft (namely, the short camshaft) is measured, the camshaft axial positioning device is assembled on a driving cylinder at the large end of the camshaft through a connecting support lug 35, and after the device is started, a left thimble positioning assembly is put in place to determine the small end position of the camshaft; then, the axial positioning device of the camshaft is put in place, the positioning pin 2 is compressed by the large end of the camshaft, the positioning pin 2 is positioned in the reference circle of the pin hole 62, then the axial positioning device is driven to rotate, the positioning pin 2 enters the pin hole 62, the large end of the camshaft is positioned, and at the moment, the positioning head 1 and the positioning pin 2 are both in an initial state (see fig. 16); and finally, driving the axial positioning device to drive the first cam shaft to rotate through the positioning pin 2, and starting detection.
If the height difference between the base circle and the journal of a second type of camshaft (namely a long camshaft) is measured, the camshaft axial positioning device is assembled on a driving cylinder at the large end of the camshaft through a connecting support lug 35, and after the device is started, a left thimble positioning assembly is put in place to determine the small end position of the camshaft; then, the axial positioning device of the camshaft is put in place, the positioning pin 2 is firstly compressed by the large end of the camshaft (see fig. 13), then the positioning head 1 is compressed by the large end of the camshaft to drive the wedge-shaped inclined plane 712 of the connecting seat 71 to slide on the steel ball 33, the positioning pin 2 and the connecting seat 71 are translated to the reference circle where the pin hole 62 is located (see fig. 14), then the axial positioning device is driven to rotate, the positioning pin 2 enters the pin hole 62 (see fig. 15) to realize the positioning of the large end of the camshaft, and at the moment, the positioning head 1 and the positioning pin 2 are both in a compressed state; and finally, driving the axial positioning device to drive the second type of camshaft to rotate through the positioning pin 2, and starting detection. After the driving cylinder drives the axial positioning device of the camshaft to move back, the positioning head 1 is reset under the elastic force of the first spring 5, and the positioning pin 2 is reset (i.e. returns to the initial state position, see fig. 3) under the elastic force of the second spring 72 and the third spring 73.
Claims (6)
1. The utility model provides a camshaft axial positioning device, including location head (1) and with pinhole (62) complex locating pin (2) of camshaft main aspects, the center of location head (1) have with thimble hole (61) complex thimble (11) of camshaft main aspects, its characterized in that: the device also comprises a base component (3), a limiting bracket (4), a first spring (5) and a connecting component (7); one end of the positioning pin (2) is provided with a baffle plate (21); the connecting assembly (7) comprises a connecting seat (71), a second spring (72), a third spring (73) and a T-shaped pin sleeve (74), the third spring (73) is vertically fixed on the side wall of the connecting seat (71), one end of the connecting seat (71) is provided with a first blind hole (711), the other end of the connecting seat is provided with a wedge-shaped inclined surface (712), the side wall of the connecting seat (71) is symmetrically provided with two sliding blocks (75), the center of the pin sleeve (74) is provided with a stepped hole (741), the aperture of the small hole of the stepped hole is matched with the diameter of the positioning pin, the aperture of the large hole is matched with the diameter of the baffle plate (21), the vertical part of the pin sleeve (74) is fixedly connected with the first blind hole, the horizontal part of the pin sleeve is positioned outside the first blind hole, the positioning pin (2) passes through the small hole of the stepped hole and extends out of the pin sleeve, the baffle plate (21) is abutted against the end surface of, the other part of the second spring (72) is positioned in the large hole of the stepped hole and abutted against the baffle plate, and the positioning pin (2) can move/reset relative to the pin sleeve; the side wall of the positioning head (1) is provided with an assembly mounting groove (12) capable of accommodating a connecting assembly along the axial direction, a third spring mounting hole (13) is formed in the assembly mounting groove (12) along the radial direction of the positioning head, two sides of the assembly mounting groove (12) are respectively provided with a sliding groove (17) along the radial direction of the positioning head, two sliding blocks are respectively positioned in the two sliding grooves and can slide along the sliding grooves, the side wall of the positioning head (1) is symmetrically provided with two second support mounting grooves (15) along the axial direction, and the center of the bottom of the positioning head (1) is provided with a guide cylinder (16; one part of the third spring (73) is arranged in the third spring mounting hole (13), the other part of the third spring (73) and the connecting seat (71) are positioned in the component mounting groove (12) and limited by a component cover plate (14) fixedly connected at the notch of the component mounting groove, and the positioning pin (2) protrudes out of the top surface of the positioning head (1) and is parallel to the axis of the positioning head (1); the base component (3) comprises a base (30) and a wedge-shaped boss (31) which is arranged on the base and has the same inclination angle with the wedge-shaped inclined plane (712), two first support mounting grooves (301) are symmetrically formed in the side wall of the base (30) along the axial direction, the two first support mounting grooves extend along the bottom of the base and are communicated with each other in the center of the bottom to form a U-shaped limiting groove, and a second blind hole (302) is formed in the center of the top of the base (30); the positioning head (1) is right opposite to the base (30), the guide cylinder (16) is inserted into the second blind hole (302), one part of the first spring (5) is positioned in the guide cylinder (16) and is abutted against the bottom of the positioning head (1), the other part of the first spring (5) is positioned in the second blind hole (302) and is abutted against the bottom surface of the second blind hole, and the wedge-shaped inclined plane (712) is in contact fit with the wedge-shaped boss (31); spacing support (4) are the U-shaped, spacing support (4) span at the spacing inslot of U-shaped, and the top both ends are located two second support mounting grooves (15) respectively and location head (1) fixed connection, location head (1) can move/reset for base (30) along the axial, spacing support (4) can move/reset for base (30) under the drive of location head (1), locating pin (2) and connecting seat (71) can move/reset for thimble (11) along the radial of location head (1) under the spring action of third spring (73), spacing support (4) can restrict the relative position of location head and base subassembly when the location head resets.
2. The camshaft axial positioning device as set forth in claim 1, wherein: the base component (3) further comprises a steel ball cover plate (32) and N steel balls (33), the steel ball cover plate (32) is provided with N steel ball holes (321) with the diameter smaller than that of the steel balls, and the back of the steel ball cover plate (32) is provided with a protrusion (322); the wedge-shaped surface of the wedge-shaped boss (31) is provided with N hemispherical grooves (311), N steel balls are respectively arranged in the N hemispherical grooves, a steel ball cover plate (32) covers the N steel balls (33) and is supported and fixedly connected to the wedge-shaped boss (31) through a protrusion (322), the N steel balls (33) correspond to the N steel ball holes (321), and the steel balls (33) can rotate in the hemispherical grooves and partially protrude out of the steel ball holes (321); the part of the steel ball protruding out of the steel ball hole (321) is in contact with the wedge-shaped inclined surface (712).
3. The camshaft axial positioning device as set forth in claim 2, wherein: the base component (3) further comprises a sleeve (34), the sleeve (34) is provided with an external thread, the second blind hole (302) is provided with an internal thread, the sleeve is in threaded connection with the second blind hole, part of the sleeve protrudes out of the top surface of the base, and the guide cylinder (16) is inserted into the sleeve (34) and is in clearance fit with the sleeve.
4. The camshaft axial positioning device as set forth in claim 2, wherein: the bottom edge of the base (30) is symmetrically provided with two connecting lugs (35).
5. The camshaft axial positioning device as set forth in claim 2, wherein: the bottom of spacing support (4) has spacing round platform (42), the bottom center of base (30) seted up with spacing round platform assorted circular slot (303), this circular slot will two first support mounting grooves (301) intercommunication, when spacing support (4) span in the spacing inslot of U-shaped, spacing round platform (42) are located circular slot (303) and circular slot clearance fit.
6. The camshaft axial positioning device as claimed in any one of claims 1 to 5, wherein: the angle of inclination α = arctan (a-B)/(B-a) of the wedge ramp (712); the positioning method comprises the following steps that A represents the length of a first camshaft to be positioned, a represents the distance between the center of a thimble hole of the large end of the first camshaft to be positioned and the center of a pinhole, B represents the length of a second camshaft to be positioned, B represents the distance between the center of the thimble hole of the large end of the second camshaft to be positioned and the center of the pinhole, A is less than B, and a is greater than B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911377696.9A CN111136597B (en) | 2019-12-27 | 2019-12-27 | A camshaft axial positioning device |
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| CN111843886A (en) * | 2020-09-22 | 2020-10-30 | 苏州鼎纳自动化技术有限公司 | Rotary carrier mechanism |
| CN112146873A (en) * | 2020-10-21 | 2020-12-29 | 淮安辰锟科技有限公司 | A detection device and detection method of a camshaft signal wheel |
| CN114129821B (en) * | 2020-12-21 | 2024-03-19 | 艾诺克医美科技(珠海)有限公司 | Multi-needle injection needle head capable of controlling needle-out length with high precision |
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