Elastic positioning lock pin with self-locking property

Abstract

The utility model discloses an elastic positioning lock pin with self-locking performance, which comprises a positioning cylinder, a self-locking mechanism and an external supporting mechanism, the upper end of the positioning cylinder is fixedly connected with a fixing sheet, the upper side of the fixing sheet is provided with a pressing sheet, and the upper end of the pressing sheet is fixedly connected with a positioning pin; the self-locking mechanism comprises a fixing barrel, avoiding openings, locking handles and inclined blocks, the fixing barrel is fixedly connected to the center of the upper surface of the fixing piece, the inclined blocks are fixedly connected to the upper end of the inner wall of the fixing barrel, the avoiding openings are evenly formed in the pressing piece, the locking handles are rotationally connected to the interiors of the avoiding openings, and the locking handles are fixedly connected to the inner wall of the fixing piece. The lower ends of the locking handles are installed on the inner surfaces of the inclined blocks in a matched mode. The outer supporting mechanism is arranged in the positioning cylinder, the self-locking mechanism further comprises a guide groove and a guide column, and the elastic positioning lock pin with the self-locking performance can automatically adapt to positioning holes of vehicles with different diameters and can be stably installed in fixing holes with different diameters.

Description

TECHNICAL FIELD

[0001] The utility model relates to elastic lock pin technical field, concretely is a kind of elastic positioning lock pin with self-locking. BACKGROUND

[0002] The elastic positioning lock pin with self-locking is a positioning element widely used in the field of mechanical processing, die processing and numerical control processing, and is a mechanical component composed of a self-locking indexing spring and a positioning pin.

[0003] In the prior art, a self-locking elastic positioning pin is disclosed in patent CN111306163B, which includes a hollow main pin, the main pin includes a main pin head and a main pin working part, the main pin head has two adjusting holes, the main pin head outside the adjusting holes is sleeved with a pressing sheet, the lower part of the main pin has an anti-dropping structure, a plurality of holes are arranged on the wall of the main pin, a ball is arranged in the hole, and the diameter of the ball is greater than the wall thickness of the main pin working part;A guide sleeve is sleeved on the outer wall of the middle part of the main pin, one end of a return spring abuts against the pressing sheet, the other end of the return spring abuts against the guide sleeve, and an inner annular groove is formed on the inner wall of the guide sleeve;A locking rod and a self-locking spring are arranged in the main pin, the lower end of the locking rod abuts against the self-locking spring, the upper end of the locking rod is arranged in two waist-shaped holes through an elastic pin, the two ends of the elastic pin are arranged in the mounting holes on the pressing sheet, and an inner annular groove is formed on the surface of the locking rod.

[0004] Such self-locking elastic positioning pins have some problems, such as when facing different diameter fixing holes, the installation cylinder cannot quickly and tightly adapt to the fixing hole, which may cause unstable installation of the self-locking elastic positioning pin and affect the final positioning effect, and the diameter of the positioning pin is fixed and cannot be self-adapted to positioning insertion holes of different diameters. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problems of overcoming the defects of the prior art, and provides an elastic positioning lock pin with self-locking, which can automatically adapt to positioning holes of different diameter vehicles and can be stably installed in different diameter fixing holes, thereby effectively solving the problems in the background art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an elastic positioning lock pin with self-locking, comprising a positioning cylinder, a fixed sheet is fixedly connected to the upper end of the positioning cylinder, a pressing sheet is arranged on the upper side of the fixed sheet, and a positioning pin is fixedly connected to the upper end of the pressing sheet, characterized in that: a self-locking mechanism and an outer support mechanism are further included.

[0007] The self-locking mechanism comprises a fixing cylinder, an avoiding opening, a locking handle and an inclined block, the fixing cylinder is fixedly connected to the center position of the upper surface of the fixing sheet, the upper end of the inner wall of the fixing cylinder is fixedly connected with the inclined block, the avoiding openings are uniformly arranged in the inside of the pressing sheet, the locking handles are rotationally connected in the inside of the avoiding openings, and the lower ends of the locking handles are matchedly installed with the inner surface of the inclined block;

[0008] The outer supporting mechanism is arranged in the inside of the positioning cylinder, can automatically adapt to the positioning holes of vehicles with different diameters, and can be stably installed in the fixing holes with different diameters.

[0009] Further, the self-locking mechanism further comprises a guide groove and a guide column, the guide groove is arranged at the lower end of the inside of the fixing cylinder, the guide column is fixedly connected to the lower end of the pressing sheet, and the outer surface of the guide column is slidingly connected with the inside of the guide groove, so as to provide a guide function for the movement of the positioning pin.

[0010] Further, the outer supporting mechanism comprises a sliding seat, a connecting rod, a supporting plate and an avoiding opening, the sliding seat is slidingly connected to the upper and lower ends of the inside of the positioning cylinder, the middle part of the sliding seat is fixedly connected with uniformly distributed ribs, the inner wall of the positioning cylinder is provided with uniformly distributed rib grooves, the ribs are slidingly connected with the radially adjacent rib grooves, one end of the sliding seat close to the center of the positioning cylinder is rotationally connected with the connecting rod, one end of the radially adjacent two connecting rods away from the center axis of the positioning cylinder is rotationally connected with one end of the same supporting plate close to the center of the positioning cylinder, the avoiding openings are uniformly arranged in the middle part of the positioning cylinder, and the supporting plates are matchedly installed with the radially adjacent avoiding openings, so as to realize the stable connection of the installation cylinder and the fixing holes with different diameters.

[0011] Further, the outer supporting mechanism further comprises a bidirectional screw rod, the bidirectional screw rod is rotationally connected to the inside of the positioning cylinder, and the inside of the sliding seat is threadedly connected with the corresponding end of the bidirectional screw rod, so as to provide a driving force for the stable connection of the installation cylinder and the fixing holes with different diameters.

[0012] Further, the lower end of the bidirectional screw rod is fixedly connected with a driving knob, so as to facilitate the rotation of the bidirectional screw rod.

[0013] Further, the fixing sheet and the pressing sheet are fixedly connected with a spring, the spring is movably sleeved on the outer surface of the fixing cylinder, so as to realize the resetting of the positioning pin.

[0014] Further, the lower end of the driving knob is provided with a socket, the inside of the socket is tightly inserted with the upper end of the anti-coming-off pin, so as to realize the limiting of the installation cylinder.

[0015] Compared with the prior art, the elastic positioning lock pin with self-locking has the following advantages:

[0016] 1. When the pressure plate moves downward, the inclined block squeezes the lower end of the locking handle, causing the locking handle to rotate outward. This allows the locking handle to automatically adapt to the positioning holes of vehicles with different diameters, making the positioning effect of the elastic positioning pin more accurate and stable.

[0017] 2. A two-way screw drives the linkage mechanism. The outer support of the linkage pushes the outer support plate to move outward. The outer support plate makes close contact with the inside of the fixing hole, which improves the stability of the connection between the positioning cylinder and the fixing hole, thereby ensuring the stable installation of the elastic positioning pin in fixing holes of different diameters. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a cross-sectional view of the internal structure of this utility model;

[0020] Figure 3 This is an enlarged structural diagram of point A in this utility model;

[0021] Figure 4 This is an enlarged structural diagram of section B of the present invention;

[0022] Figure 5 This is an enlarged structural diagram of point C in this utility model.

[0023] In the diagram: 1. Positioning cylinder, 2. Fixing plate, 3. Pressure plate, 4. Self-locking mechanism, 41. Fixing cylinder, 42. Guide groove, 43. Guide post, 44. Clearance opening, 45. Locking handle, 46. Inclined block, 5. External support mechanism, 51. Two-way screw, 52. Sliding seat, 53. Connecting rod, 54. Support plate, 55. Clearance opening, 6. Spring, 7. Positioning pin, 8. Drive button, 9. Anti-detachment pin, 10. Rib groove. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-5 This embodiment provides a technical solution: an elastic positioning pin with self-locking properties, including a positioning cylinder 1, a fixing plate 2 fixedly connected to the upper end of the positioning cylinder 1, a pressure plate 3 provided on the upper side of the fixing plate 2, a positioning pin 7 fixedly connected to the upper end of the pressure plate 3, a spring 6 fixedly connected between the fixing plate 2 and the pressure plate 3, the spring 6 being movably sleeved on the outer surface of the fixing cylinder 41, and also including a self-locking mechanism 4 and an external support mechanism 5;

[0026] The self-locking mechanism 4 comprises a fixed cylinder 41, an avoiding port 44, a locking handle 45 and an inclined block 46. The fixed cylinder 41 is fixedly connected to the center of the upper surface of the fixed sheet 2. The upper end of the inner wall of the fixed cylinder 41 is fixedly connected with the inclined block 46. The avoiding ports 44 are uniformly arranged in the inside of the pressing sheet 3. The inside of the avoiding port 44 is rotatably connected with the locking handle 45. The lower end of the locking handle 45 is matchedly installed with the inner surface of the inclined block 46. The self-locking mechanism 4 further comprises a guide groove 42 and a guide column 43. The guide groove 42 is arranged at the lower end of the inside of the fixed cylinder 41. The guide column 43 is fixedly connected to the lower end of the pressing sheet 3. The outer surface of the guide column 43 is slidably connected with the inside of the guide groove 42. The positioning hole of the vehicle part is inserted with the positioning pin 7. The gravity of the vehicle part acts on the pressing sheet 3. The pressing sheet 3 moves downward. At the same time, the guide column 43 vertically slides in the inside of the guide groove 42, which guarantees the stability of the movement of the pressing sheet 3. At the same time, the spring 6 is compressed under force. The downward movement of the pressing sheet 3 drives the downward movement of the uniformly distributed locking handle 45. The lower end of the locking handle 45 rotates away from the center of the pressing sheet 3 under the extrusion of the inclined block 46. The upper end of the locking handle 45 is tightly combined with the inner wall of the positioning hole, which realizes the stable connection of the positioning hole and the positioning pin 7 and can realize self-locking;

[0027] The outer supporting mechanism 5 is arranged in the inside of the positioning cylinder 1, and comprises a sliding seat 52, a connecting rod 53, a support plate 54 and an avoiding port 55. The sliding seat 52 is slidingly connected to the upper and lower ends in the inside of the positioning cylinder 1, and the middle part of the sliding seat 52 is fixedly connected with uniformly distributed ribs. The inner wall of the positioning cylinder 1 is provided with uniformly distributed rib grooves 10, and the ribs are slidingly connected with the radially adjacent rib grooves 10. The end of the sliding seat 52 close to the center of the positioning cylinder 1 is rotatably connected with the connecting rod 53. The ends of the radially adjacent two connecting rods 53 away from the center axis of the positioning cylinder 1 are rotatably connected with the end of the same support plate 54 close to the center of the positioning cylinder 1. The avoiding ports 44 are uniformly arranged in the middle part of the positioning cylinder 1, and the support plate 54 is installed in cooperation with the radially adjacent avoiding ports 44. The outer supporting mechanism 5 further comprises a bidirectional screw 51 rotatably connected in the inside of the positioning cylinder 1. The inside of the sliding seat 52 is threadedly connected with the corresponding end of the bidirectional screw 51. The lower end of the bidirectional screw 51 is fixedly connected with a driving knob 8. The lower end of the driving knob 8 is provided with a socket. The inside of the socket is tightly inserted with the upper end of an anti-coming-off pin 9. The positioning cylinder 1 is inserted into the inside of the working plane fixing hole from top to bottom. When the lower surface of the fixing ring 2 is attached to the upper end of the fixing hole, the driving knob 8 is rotated. The rotation of the driving knob 8 drives the rotation of the bidirectional screw 51. The rotation of the bidirectional screw 51 moves the sliding seat 52 towards the center of the positioning cylinder 1. Meanwhile, the ribs slide in the corresponding rib grooves 10, providing guidance and limiting action for the movement of the sliding seat 52. Meanwhile, the movement of the two sliding seats 52 towards each other drives the movement of the ends of the connecting rods 53 away from the center of the positioning cylinder 1 towards the center of the positioning cylinder 1. In turn, the ends of the connecting rods 53 close to the center of the positioning cylinder 1 push the radially adjacent support plates 54 away from the center of the positioning cylinder 1. The support plates 54 move out of the radially adjacent avoiding ports 55 and tightly attach to the inner wall of the fixing hole, thereby realizing the stable connection of the positioning cylinder 1 and the fixing hole.

[0028] The working principle of the elastic positioning lock pin with self-locking property is as follows: in working, personnel firstly insert the positioning cylinder 1 into the inside of the working plane fixing hole from top to bottom, when the lower surface of the fixing ring 2 is attached to the upper end of the fixing hole, personnel rotate the driving knob 8, the driving knob 8 rotation drives the bidirectional screw rod 51 to rotate, the bidirectional screw rod 51 rotation makes the sliding seat 52 move towards the center of the positioning cylinder 1, at the same time, the ribs slide in the corresponding rib grooves 10, which provides the guiding and limiting effect for the movement of the sliding seat 52, at the same time, the relative movement of the two sliding seats 52 drives the connecting rod 53 to move towards the center of the positioning cylinder 1, and then the end of the connecting rod 53 close to the center of the positioning cylinder 1 drives the radially adjacent support plates 54 to move away from the center of the positioning cylinder 1, the support plates 54 move out of the radially adjacent avoiding openings 55 and are tightly attached to the inner wall of the fixing hole, thereby realizing the stable connection of the positioning cylinder 1 and the fixing hole, after the stable connection, personnel stop rotating the driving knob 8, and insert the anti-coming-off pin 9 into the lower end of the driving knob 8, then personnel insert the positioning hole of the vehicle part into the positioning pin 7, the gravity of the vehicle part acts on the pressing piece 3, the pressing piece 3 moves downward, at the same time, the guide column 43 vertically slides in the guide groove 42, which guarantees the stability of the movement of the pressing piece 3, at the same time, the spring 6 is compressed under stress, the downward movement of the pressing piece 3 drives the uniformly distributed locking handles 45 to move downward, the lower end of the locking handle 45 rotates away from the center of the pressing piece 3 under the extrusion of the inclined block 46, the upper end of the locking handle 45 is tightly attached to the inner wall of the positioning hole, thereby realizing the stable connection of the positioning hole and the positioning pin 7, and the self-locking can be realized.

[0029] The above is only the embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent flow transformation by using the contents of the utility model specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the utility model.

Claims

1. A self-locking elastic positioning pin, comprising a positioning cylinder (1), a fixing plate (2) fixedly connected to the upper end of the positioning cylinder (1), a pressure plate (3) provided on the upper side of the fixing plate (2), and a positioning pin (7) fixedly connected to the upper end of the pressure plate (3), characterized in that: It also includes self-locking mechanism (4) and outer support mechanism (5); The self-locking mechanism (4) includes a fixed cylinder (41), an avoidance port (44), a locking handle (45) and an inclined block (46), the fixed cylinder (41) is fixedly connected to the center of the upper surface of the fixed sheet (2), the upper end of the inner wall of the fixed cylinder (41) is fixedly connected with the inclined block (46), the avoidance port (44) is evenly arranged in the inside of the pressing sheet (3), the inside of the avoidance port (44) is rotatably connected with the locking handle (45), and the lower end of the locking handle (45) is matched and installed with the inner surface of the inclined block (46); The outer support mechanism (5) is arranged in the inside of the positioning cylinder (1).

2. The elastic positioning lock pin with self-locking according to claim 1, characterized in that: The self-locking mechanism (4) further includes a guide groove (42) and a guide column (43), the guide groove (42) is arranged at the lower end of the inside of the fixed cylinder (41), and the guide column (43) is fixedly connected to the lower end of the pressing sheet (3), and the outer surface of the guide column (43) is slidably connected with the inside of the guide groove (42).

3. The elastic positioning lock pin with self-locking according to claim 1, characterized in that: The outer support mechanism (5) includes a sliding seat (52), a connecting rod (53), a support plate (54) and an avoidance port (55), the sliding seat (52) is slidably connected to the upper and lower ends of the inside of the positioning cylinder (1), the middle part of the sliding seat (52) is fixedly connected with evenly distributed ribs, the inner wall of the positioning cylinder (1) is provided with evenly distributed rib grooves (10), the ribs are slidably connected with the radially adjacent rib grooves (10), one end of the sliding seat (52) close to the center of the positioning cylinder (1) is rotatably connected with the connecting rod (53), the radially adjacent two connecting rods (53) are rotatably connected with the same support plate (54) at one end away from the center axis of the positioning cylinder (1), the avoidance ports (44) are evenly arranged in the middle part of the positioning cylinder (1), and the support plates (54) are matched and installed with the radially adjacent avoidance ports (44).

4. The elastic positioning lock pin with self-locking according to claim 3, characterized in that: The outer support mechanism (5) further includes a bidirectional screw (51), the bidirectional screw (51) is rotatably connected to the inside of the positioning cylinder (1), and the inside of the sliding seat (52) is threadedly connected with the corresponding end of the bidirectional screw (51).

5. The elastic positioning lock pin with self-locking according to claim 4, characterized in that: The lower end of the bidirectional screw (51) is fixedly connected with the driving knob (8).

6. The elastic detent with self-locking according to claim 1, characterized in that: The fixed sheet (2) and the pressing sheet (3) are fixedly connected with the spring (6), and the spring (6) is movably sleeved on the outer surface of the fixed cylinder (41).

7. The elastic positioning lock pin with self-locking according to claim 5, characterized in that: The lower end of the driving knob (8) is provided with a socket, and the inside of the socket is tightly inserted with the upper end of the anti-dropping pin (9).

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