Self-adaptive mechanism for quickly adjusting height of positioning pin

Abstract

The utility model provides a self-adaptive mechanism for quickly adjusting the height of a positioning pin, which is characterized in that a nitrogen spring is fixedly mounted inside a shell, the shell is fixedly mounted at a preset position through a support, a guide shaft is mounted at the actuating end of the nitrogen spring, the positioning pin is arranged at one end of the guide shaft, a sliding chute is axially formed in the periphery of the guide shaft, and a spring pin is arranged on the outer wall of the shell; the execution end of the spring pin can be inserted into the sliding groove. According to the self-adaptive mechanism for quickly adjusting the height of the positioning pin, the nitrogen spring is a floating elastic structure of the guide shaft and the positioning pin, the positioning pin is always in a pop-up state, a positioning hole in a part needing to be positioned is sleeved on the periphery of the positioning pin, and the lower end of the part is pressed on the annular table, so that the extending height of the positioning pin is adaptive to the part; the sliding groove is a limiting structure for the floating amount of the positioning pin, the extension length and the retraction depth of the positioning pin are limited through the spring pin, and the positioning structure can adapt to positioning of parts of various specifications and is wide in application range and easy to operate.

Description

Technical Field

[0001] The utility model belongs to the field of positioning structures, in particular to a positioning pin height rapid adjustment adaptive mechanism. Background Art

[0002] In the prior art, there are a large number of main frames of frame structures in the tooling and jigs of agricultural machinery, engineering machinery and automobiles. When the main frames are produced and processed, the connection positions of the main frames need to be riveted or welded. After the connection is completed, the main frames need to be sprayed with anti-corrosion as a whole. When the main frames are maintained and repaired, the maintenance points of the main frames need to be found and maintained. When the main frames are installed, the frames need to be positioned through the locating pin structure. The specifications of the main frames of different products are different, which results in different lengths of the locating pins. The locating pins need to be replaced frequently, resulting in reduced production efficiency. Summary of the invention

[0003] In view of this, the utility model aims to propose a positioning pin height rapid adjustment adaptive mechanism to solve the problem that workpieces with different thickness specifications have different lengths of positioning pins and need to be repeatedly installed at the work station, resulting in reduced work efficiency.

[0004] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0005] A positioning pin height rapid adjustment adaptive mechanism comprises a nitrogen spring, a guide shaft, a positioning pin and a spring pin. The nitrogen spring is fixedly installed inside a shell, and the shell is fixedly installed to a preset position through a support. The guide shaft is installed at the execution end of the nitrogen spring, and the positioning pin is arranged at one end of the guide shaft. A slide groove is arranged axially on the periphery of the guide shaft, and a spring pin is arranged on the outer wall of the shell, and the execution end of the spring pin can be inserted into the slide groove.

[0006] Furthermore, a blind groove is provided at the lower end of the guide shaft, the periphery of the nitrogen spring is located in the blind groove, and the actuating end of the nitrogen spring can abut against the top of the blind groove.

[0007] Furthermore, a shaft sleeve is installed at the upper end of the shell, the periphery of the locating pin is located at the inner ring of the shaft sleeve, and the lower end of the shaft sleeve can abut against the upper end of the column guide shaft.

[0008] Furthermore, the side wall of the guide shaft is provided with an open groove along the axial direction, and a limit pin is installed on the side wall of the shell. The periphery of the limit pin is located in the open groove, and the periphery of the limit pin can slide in the open groove.

[0009] Furthermore, the spring pin includes a shell, which is fixedly mounted on the outer shell. A pull bolt is slidably arranged on the shell. The pull bolt and the guide shaft are arranged perpendicular to each other. A push pin is arranged at one end of the pull bolt. The execution end of the push pin is located in the slide groove. The pull bolt can drive the push pin to slide along the axial direction of the pull bolt.

[0010] Furthermore, a return spring is arranged around the pull bolt, and a retaining ring is arranged around the push pin, one end of the retaining ring can abut against the outer wall of the shell, the other end of the retaining ring is fixedly connected to one end of the return spring, and the other end of the return spring is fixedly connected to the shell.

[0011] Compared with the prior art, the positioning pin height quick adjustment adaptive mechanism described in the utility model has the following beneficial effects:

[0012] (1) The positioning pin height quick adjustment adaptive mechanism described in the utility model, the nitrogen spring is a floating elastic structure of the guide shaft and the positioning pin, the outer periphery of the nitrogen spring can be fixedly installed to a preset fixed position through the outer shell and the support, the positioning pin is always in a pop-up state, the positioning hole on the part to be positioned is sleeved on the outer periphery of the positioning pin, the lower end of the part is pressed onto the ring table, so that the extended height of the positioning pin is adapted to the part, the slide groove is a limiting structure for the floating amount of the positioning pin, and the extension length and retraction depth of the positioning pin are limited by the spring pin. The positioning structure can adapt to the positioning of parts of various specifications, has a wide range of uses, and is simple to operate.

[0013] (2) The positioning pin height quick adjustment adaptive mechanism described in the utility model has a blind groove at the lower end of the guide shaft, and the outer periphery of the nitrogen spring is located in the blind groove, thereby reducing the size of the component and saving installation space;

[0014] The lower end of the sleeve can abut against the upper end of the column guide shaft. The sleeve is used to limit the upper limit of the movement of the guide shaft to prevent the guide shaft from popping out due to the action of the nitrogen spring, resulting in a reduction in the life of the parts or a production accident.

[0015] The cooperation of the opening groove and the limit pin is used to prevent the guide shaft from rotating relative to the housing, thereby improving the stability of the parts in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0017] Figure 1 It is a structural schematic diagram of the positioning pin height rapid adjustment adaptive mechanism according to an embodiment of the utility model;

[0018] Figure 2 It is a cross-sectional schematic diagram of the positioning pin height rapid adjustment adaptive mechanism according to an embodiment of the utility model;

[0019] Figure 3 This is a schematic structural diagram of the guide shaft, nitrogen spring and spring pin assembly described in an embodiment of the utility model.

[0020] Description of reference numerals:

[0021] 1-support; 2-housing; 21-limit pin; 3-nitrogen spring; 4-guide shaft; 41-slide groove; 42-opening groove; 5-sleeve; 6-locating pin; 7-spring pin; 71-housing; 72-pull bolt; 73-lift pin; 74-retaining ring. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0023] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0025] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0026] like Figure 1-Figure 3As shown, the positioning pin height quick adjustment adaptive mechanism includes a nitrogen spring 3, a guide shaft 4, a positioning pin 6 and a spring pin 7. The nitrogen spring 3 is fixedly installed inside the housing 2, and the housing 2 is fixedly installed to a preset position through a support 1. The execution end of the nitrogen spring 3 is installed with the guide shaft 4, and one end of the guide shaft 4 is provided with a positioning pin 6, and the upper part of the positioning pin 6 is a conical structure, and the lower part of the positioning pin 6 is connected to the guide shaft 4 through a ring stage. The outer periphery of the guide shaft 4 is axially provided with a slide groove 41, and the outer wall of the housing 2 is provided with a spring pin 7, and the execution end of the spring pin 7 can be inserted into the slide groove 41. The spring 3 is a floating elastic structure of the guide shaft 4 and the locating pin 6. The periphery of the nitrogen spring 3 can be fixedly installed to a preset fixed position through the outer shell 2 and the support 1. The locating pin 6 is always in a pop-up state. The locating hole on the part to be positioned is sleeved on the periphery of the locating pin 6. The lower end of the part is pressed onto the ring stage so that the protruding height of the locating pin 6 is adapted to the part. The slide groove 41 is a limiting structure for the floating amount of the locating pin 6, and the protruding length and retraction depth of the locating pin 6 are limited by the spring pin 7. The positioning structure can adapt to the positioning of parts of various specifications, has a wide range of uses, and is easy to operate.

[0027] like Figure 2 As shown, a blind groove is provided at the lower end of the guide shaft 4, the periphery of the nitrogen spring 3 is located in the blind groove, and the actuating end of the nitrogen spring 3 can abut against the top of the blind groove, thereby reducing the size of the component and saving installation space. A sleeve 5 is installed at the upper end of the outer shell 2, the periphery of the locating pin 6 is located at the inner ring of the sleeve 5, and the lower end of the sleeve 5 can abut against the upper end of the column guide shaft 4. The sleeve 5 is used to limit the upper limit of the movement of the guide shaft 4 to prevent the guide shaft 4 from popping out due to the action of the nitrogen spring 3, resulting in a reduced life of the parts or a production accident.

[0028] An open groove 42 is axially provided on the side wall of the guide shaft 4, and a limit pin 21 is installed on the side wall of the outer shell 2. The periphery of the limit pin 21 is located in the open groove 42, and the periphery of the limit pin 21 can slide in the open groove 42. The cooperation between the open groove 42 and the limit pin 21 is used to prevent the guide shaft 4 from rotating relative to the outer shell 2, thereby improving the stability of the parts in use.

[0029] The spring pin 7 includes a shell 71, which is fixedly mounted on the outer shell 2. A pull bolt 72 is slidably arranged on the shell 71. The pull bolt 72 and the guide shaft 4 are arranged perpendicular to each other. A push pin 73 is arranged at one end of the pull bolt 72. The execution end of the push pin 73 is located in the slide groove 41. The pull bolt 72 can drive the push pin 73 to slide along the axial direction of the pull bolt 72.

[0030] The cam 74 is provided with a plurality of locking cams 76 which are provided on the cam face 71 so that the locking cam 74 can be locked to the locking cam 71. The cam 74 is provided with a plurality of locking cams 76 which are provided on the cam face 71. The plurality of locking cams 76 are provided with a plurality of locking cams 76 which can be locked to the locking cam 71. The plurality of locking cams 76 are provided with a plurality of locking cams 76 which can be locked to the locking cam 71.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. The positioning pin height quick adjustment adaptive mechanism is characterized by: The invention comprises a nitrogen spring (3), a guide shaft (4), a positioning pin (6) and a spring pin (7); the nitrogen spring (3) is fixedly installed inside a housing (2), and the housing (2) is fixedly installed at a preset position through a support (1); the guide shaft (4) is installed at the execution end of the nitrogen spring (3), and the positioning pin (6) is arranged at one end of the guide shaft (4); a slide groove (41) is arranged axially on the periphery of the guide shaft (4); a spring pin (7) is arranged on the outer wall of the housing (2), and the execution end of the spring pin (7) can be inserted into the slide groove (41).

2. The positioning pin height rapid adjustment adaptive mechanism according to claim 1, characterized in that: A blind groove is provided at the lower end of the guide shaft (4), the periphery of the nitrogen spring (3) is located in the blind groove, and the actuating end of the nitrogen spring (3) can abut against the top of the blind groove.

3. The positioning pin height rapid adjustment adaptive mechanism according to claim 1, characterized in that: The upper end of the housing (2) is mounted with a shaft sleeve (5), the periphery of the positioning pin (6) is located at the inner ring of the shaft sleeve (5), and the lower end of the shaft sleeve (5) can abut against the upper end of the column guide shaft (4).

4. The positioning pin height rapid adjustment adaptive mechanism according to claim 1, characterized in that: An open groove (42) is provided on the side wall of the guide shaft (4) along the axial direction, a limit pin (21) is installed on the side wall of the housing (2), the periphery of the limit pin (21) is located in the open groove (42), and the periphery of the limit pin (21) can slide in the open groove (42).

5. The positioning pin height rapid adjustment adaptive mechanism according to claim 1, characterized in that: The spring pin (7) comprises a shell (71), the shell (71) is fixedly mounted on the outer shell (2), a pull bolt (72) is slidably arranged on the shell (71), the pull bolt (72) and the guide shaft (4) are arranged perpendicular to each other, a push pin (73) is arranged at one end of the pull bolt (72), the execution end of the push pin (73) is located in the slide groove (41), and the pull bolt (72) can drive the push pin (73) to slide along the axial direction of the pull bolt (72).

6. The positioning pin height rapid adjustment adaptive mechanism according to claim 5, characterized in that: A return spring is arranged on the periphery of the pull bolt (72), and a retaining ring (74) is arranged on the periphery of the ejector pin (73). One end of the retaining ring (74) can abut against the outer wall of the housing (2), and the other end of the retaining ring (74) is fixedly connected to one end of the return spring, and the other end of the return spring is fixedly connected to the housing (71).

Images