CN218556339U - A cam positioning tool - Google Patents

Abstract

The utility model relates to a cam location frock belongs to cam processing technology field. The problem of the precision control degree of difficulty is big when the cam outline is processed is solved. Including base, location axle, first location axle and second location axle, the central processing of base has the centre bore, and centre bore department processing has the second constant head tank of symmetry, fixes a position epaxial first location axle and the second location axle of installing, fixes a position the centre bore that the axle passed the base, and the both ends of second location axle are located the second constant head tank, and the center pin of first location axle and second location axle is perpendicular with A face. The utility model firstly positions the inner hole of the spline on the cam, thereby aligning the center of the part, having high positioning precision, being convenient for milling the appearance, and ensuring that the relative deviation between the inner hole center line of the spline and the cam center line is not more than 0.5 degrees; the utility model discloses simple structure, it is with low costs, the operation of being convenient for, greatly reduced the precision control degree of difficulty, guarantee finished product quality.

Description

A cam positioning tool

technical field

The utility model relates to a positioning tool, which belongs to the technical field of cam processing.

Background technique

The cam is a rotary or sliding part in mechanical transmission. The cam transmission structure is simple and compact, and the cam profile can be easily designed to achieve the expected movement law of the follower. It transmits the motion to the roller moving close to its edge or on the groove surface The needle bar moves freely, or it takes the force from the rollers and the needle bar. During the use of the cam, the centerline of the spline groove and the centerline of the cam must have a certain positional relationship requirement, which puts forward higher requirements on the machining accuracy of the cam, even if the centerline of the cam and the centerline of the spline internal control are centered. However, since the outer contour of the cam is arc-shaped, the positioning accuracy is low, which makes it difficult to center during processing and affects the accuracy of the finished product.

Therefore, there is an urgent need to propose a cam positioning tool to solve the above technical problems.

Utility model content

The research and development of the utility model solves the problem that the accuracy control is difficult when the cam outer contour is processed. A brief overview of the present invention is given below in order to provide a basic understanding of certain aspects of the present invention. It should be understood that this summary is not an exhaustive summary of the invention. It is not intended to identify the key or important part of the present invention, nor is it intended to limit the scope of the present invention.

Technical scheme of the utility model:

A cam positioning tool, including a base, a positioning shaft, a first positioning shaft and a second positioning shaft, a center hole is processed in the center of the base, a symmetrical second positioning groove is processed at the center hole, and a second positioning groove is installed on the positioning shaft. A positioning shaft and a second positioning shaft, the positioning shaft passes through the central hole of the base, the two ends of the second positioning shaft are located in the second positioning groove, the central axis of the first positioning shaft and the second positioning shaft is perpendicular to the A surface, A The plane is perpendicular to the base, and a perpendicular line of the base is located on the A plane.

Preferably: it also includes a second bolt, the positioning shaft is a stepped shaft, the positioning shaft includes a first stage, a second stage and a third stage, the first stage, the second stage and the third stage are arranged coaxially in sequence, and an array arrangement is processed on the first stage The connection holes of the second stage and the third stage are all processed with radial through holes, the first positioning shaft is connected with the radial through hole of the third stage, and the second positioning shaft is connected with the radial through hole of the second stage, The second bolt is connected with the base through the connecting hole.

Preferably: the center of the cam has a spline inner hole, and the spline inner hole has symmetrically arranged first and second tooth grooves, the cam is connected to the three-stage through the spline inner hole, and the two ends of the first positioning shaft are respectively arranged In the first tooth groove, the second tooth groove.

Preferably: the cam is processed with a circular array of through holes, the center of the base has a circular boss, the circular boss of the base is processed with a threaded hole corresponding to the through hole, and the first bolt is connected to the threaded hole through the through hole .

Preferably: the number of said through holes is six.

Preferably: the base is square, and wide grooves are processed on both sides of the base.

Preferably: the degree of symmetry between the first positioning axis and the second positioning axis relative to the surface B is not greater than 0.03.

The utility model has the following beneficial effects:

The utility model first positions the cam in the inner hole of the spline to align the center of the part, has high positioning accuracy, is convenient for milling shape processing, and ensures the relative offset between the center line of the inner hole of the spline and the center line of the cam.

The utility model is simple in structure, low in cost, easy to operate, greatly reduces the difficulty of precision control, and ensures the quality of finished products.

Description of drawings

Fig. 1 is a structural schematic diagram of a cam positioning tool;

Fig. 2 is A-A sectional view among Fig. 1;

Fig. 3 is the structural representation of base;

Fig. 4 is the structural representation of positioning shaft;

Fig. 5 is a structural schematic diagram of the cam.

In the figure: 1-base, 2-positioning shaft, 3-first positioning shaft, 4-second positioning shaft, 5-first bolt, 6-second bolt, 7-cam, 11-second positioning slot, 12 - wide groove, 13 - threaded hole, 21 - first stage, 22 - second stage, 23 - third stage, 71 - spline inner hole, 711 - first tooth groove, 712 - second tooth groove.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is described below through specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and not intended to limit the scope of the present invention. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessarily confusing the concept of the present invention.

In this utility model, unless otherwise specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connection, or integration; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

Specific embodiment 1: This embodiment is described in conjunction with Fig. 1-5. A cam positioning tool of this embodiment includes a base 1, a positioning shaft 2, a first positioning shaft 3 and a second positioning shaft 4. The base 1 The center is processed with a center hole, and the center hole is processed with a symmetrical second positioning groove 11. The positioning shaft 2 is equipped with a first positioning shaft 3 and a second positioning shaft 4. The positioning shaft 2 passes through the center hole of the base 1, and the second The two ends of the positioning shaft 4 are located in the second positioning groove 11, the central axis of the first positioning shaft 3 and the second positioning shaft 4 are perpendicular to the A surface, and the A surface is vertically arranged with the plane of the base 1 in Fig. 1, and one of the base 1 The vertical line is located on the A surface; this device firstly positions the spline inner hole 71 to the cam 7, and finds the center of the part. The relative deviation of the center line is not more than 0.5°; the device has a simple structure, low cost, and is easy to operate, which greatly reduces the difficulty of precision control and ensures the quality of finished products.

Also includes the second bolt 6, the positioning shaft 2 is a stepped shaft, the positioning shaft 2 includes a first stage 21, a second stage 22 and a third stage 23, the first stage 21, the second stage 22 and the third stage 23 are arranged coaxially in sequence, and a The axial connecting holes arranged in an array are processed on the stage 21, the radial through holes are processed on the second stage 22 and the third stage 23, the first positioning shaft 3 is connected with the radial through holes of the third stage 23, and the first The second positioning shaft 4 is connected to the radial through hole of the second stage 22, and the second bolt 6 is connected to the base 1 through the connecting hole.

The center of the cam 7 has a spline inner hole 71, and the spline inner hole 71 has a symmetrically arranged first tooth groove 711 and a second tooth groove 712. The cam 7 is connected with the three-stage 23 through the spline inner hole 71, and the first positioning shaft The two ends of 3 are arranged in the first tooth groove 711 and the second tooth groove 712 respectively.

The cam 7 is processed with a circular array of through holes 72, the center of the base 1 has a circular boss, the circular boss of the base 1 is processed with a threaded hole 13 corresponding to the through hole, and the first bolt 5 passes through the through hole 72 Connect with threaded hole 13;

The number of the through holes 72 is six.

The base 1 is square, and wide grooves 12 are processed on both sides of the base 1; the device and the machine tool are fixed through the wide grooves 12, and the A surface and the B surface are positioned, and the second positioning shaft 4 and the second positioning groove 11 are used to The cooperation makes the positioning shaft 2 perpendicular to the A surface, thereby realizing the positioning of the first positioning shaft 3, and the first tooth groove 711 and the second tooth groove 712 of the cam 7 cooperate with the first positioning shaft 3 to realize the positioning of the cam 7. The center line of the spline inner hole 71 is matched with the B surface, and the precise positioning of the cam 7 is realized by positioning the center line of the spline inner hole 71, and then the outer contour of the cam 7 is processed by the milling cutter of the machine tool, so that the cam The center line of 7 is centered with the center line of spline inner hole 71.

The symmetry of the first positioning axis 3 and the second positioning axis 4 with respect to the B surface is not more than 0.03, the B surface is perpendicular to the plane of the base 1 in Figure 1, and the other perpendicular line of the base 1 is located on the B surface, two perpendicular The intersection point of the set perpendicular line is the center of the center hole.

It should be noted that, in the above embodiments, as long as the technical solutions that are not contradictory can be permutated and combined, those skilled in the art can exhaust all possibilities according to the mathematical knowledge of permutations and combinations. The schemes are described one by one, but it should be understood that the technical schemes after permutation and combination have been disclosed by the utility model.

The above descriptions are only preferred embodiments of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (7)

1. The utility model provides a cam location frock which characterized in that: including base (1), location axle (2), first location axle (3) and second location axle (4), the center processing of base (1) has the centre bore, and centre bore department processing has second constant head tank (11) of symmetry, installs first location axle (3) and second location axle (4) on location axle (2), and the centre bore of base (1) is passed in location axle (2), and the both ends of second location axle (4) are located second constant head tank (11), and the center pin of first location axle (3) and second location axle (4) is perpendicular with the A face, and the A face is perpendicular with base (1), and a perpendicular bisector of base (1) is located the A face.

2. The cam positioning tool according to claim 1, characterized in that: still include second bolt (6), location axle (2) are the step shaft, and location axle (2) include one stage (21), two-stage (22) and three-stage (23), one stage (21), two-stage (22) and three-stage (23) coaxial setting in order, processing has the connecting hole that the array was arranged on one stage (21), all has processed radial through-hole on two-stage (22), the three-stage (23), first location axle (3) are connected with the radial through-hole of three-stage (23), second location axle (4) are connected with the radial through-hole of two-stage (22), and second bolt (6) pass the connecting hole and are connected with base (1).

3. The cam positioning tool according to claim 2, characterized in that: the center of the cam (7) is provided with a spline inner hole (71), the spline inner hole (71) is provided with a first tooth groove (711) and a second tooth groove (712) which are symmetrically arranged, the cam (7) is connected with the three stages (23) through the spline inner hole (71), and two ends of the first positioning shaft (3) are respectively arranged in the first tooth groove (711) and the second tooth groove (712).

4. The cam positioning tool according to claim 3, characterized in that: through holes (72) in a circumferential array are processed on the cam (7), a circular boss is arranged at the center of the base (1), a threaded hole (13) corresponding to the through holes is processed on the circular boss of the base (1), and the first bolt (5) penetrates through the through holes (72) to be connected with the threaded hole (13).

5. The cam positioning tool according to claim 4, characterized in that: the number of the through holes (72) is six.

6. The cam positioning tool according to claim 2, characterized in that: the base (1) is square, and wide grooves (12) are machined on two sides of the base (1).

7. The cam positioning tool according to claim 6, characterized in that: the symmetry degree of the first positioning shaft (3) and the second positioning shaft (4) relative to the B surface is not more than 0.03, the B surface is vertical to the base (1), and the other perpendicular bisector of the base (1) is positioned on the B surface.

Images