Turnover type positioning pin

Abstract

The turnover type positioning pin comprises a base, a swing rod and a pin body, the middle of the swing rod is hinged to the side of the base through a horizontally-arranged rotating shaft, the pin body is of a cylindrical structure, and the pin body is connected to one end of the swing rod; the axis of the pin body is perpendicular to the axis of the rotating shaft. After the technical scheme is adopted, when production tasks are switched between a vehicle body which needs to be positioned and a vehicle body which does not need to be positioned, the pin body can be quickly switched between a put-in-use state and a non-put-in-use state through simple overturning operation, disassembly and assembly operation is not needed, and the working efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile production, especially relates to a positioning pin, more specifically, a kind of overturnable positioning pin. BACKGROUND

[0002] In the automobile assembly line, the bodies of multiple different platforms are often produced in line, and among them, according to the different matching accuracy, some models of the body need to be accurately positioned, at which time the body bottom needs to be connected with the corresponding supporting components of the production line through the positioning pin, and the bodies of other models only need to be supported and do not need the positioning pin, and the previously installed positioning pin will interfere with the body of the new production task. Therefore, when switching between different body production tasks, the positioning pin often needs to be switched, for example, after completing the assembly work of the body that needs accurate positioning, the positioning pin must be removed before the subsequent production of the body that does not need accurate positioning. This work is currently generally carried out manually, resulting in low work efficiency and affecting the production rhythm of the production line. Therefore, how to quickly switch the positioning pin when switching between different body production tasks is a problem to be solved. SUMMARY

[0003] The utility model embodiment provides an overturnable positioning pin to quickly switch the positioning pin when switching between different body production tasks, thereby improving work efficiency.

[0004] To achieve the above purpose, the utility model embodiment provides an overturnable positioning pin, characterized by comprising base, swing lever and pin body, the middle part of the swing lever is hinged to the side of the base through the horizontal shaft, the pin body is a cylindrical structure, and the pin body is connected to one end of the swing lever; the axis of the pin body is perpendicular to the axis of the shaft.

[0005] Further, the overturnable positioning pin further comprises a first limiting plate connected to the side of the base and a second limiting plate connected to the side of the base, and the first limiting plate and the second limiting plate are located on the swing lever's rotation track; when the front side of the swing lever contacts the first limiting plate, the orientation of the pin body is vertically upward.

[0006] Further, the angle between the surface of the first limiting plate and the surface of the second limiting plate is 90°, and the first limiting plate and the second limiting plate are symmetrically distributed on both sides of the shaft; when the back side of the swing lever contacts the second limiting plate, the orientation of the pin body is horizontal.

[0007] Further, the first limiting plate and the base are detachably connected; the second limiting plate and the base are detachably connected.

[0008] Further, the side of the first limiting plate close to the swing lever is connected with a buffer plate, and the side of the second limiting plate close to the swing lever is connected with a buffer plate.

[0009] Further, the pivot is further sleeved with a butterfly spring, the outer end of the pivot is a threaded end, and the threaded end is screwed with a locking nut; the butterfly spring is located between the swing lever and the locking nut.

[0010] Further, the end of the pin body away from the swing lever further comprises a guide section, the outer diameter of the guide section is smaller than the outer diameter of the swing lever; and the end of the guide section is further provided with a conical surface.

[0011] Further, the upper end of the swing lever is connected with an upper lever, and the lower end of the swing lever is connected with a lower lever; the upper lever and the lower lever both protrude from the outer side of the swing lever in the horizontal direction.

[0012] Further, the tiltable positioning pin further comprises two horizontally arranged air cylinders, the two air cylinders are arranged in an upper and lower spaced manner and are located on the same side of the swing lever, the axis of the air cylinder is perpendicular to the axial direction of the pivot; the piston rod end of the air cylinder is further connected with a disc-shaped push disc; when the upper air cylinder is extended and retracted, the upper lever can be in contact with the upper push disc; when the lower air cylinder is extended and retracted, the lower lever can be in contact with the lower push disc.

[0013] Further, the tiltable positioning pin further comprises a position sensor for detecting the position of the lower lever.

[0014] The above technical scheme has the following beneficial effects:

[0015] After the technical scheme is adopted, when the production task switching is performed between the vehicle body that needs to be positioned and the vehicle body that does not need to be positioned, the disassembly and assembly operation is not needed, but through the simple flipping operation, the pin body can be quickly converted between the in-use state (i.e. the state that the pin body is vertically upward and can be inserted into the positioning hole of the vehicle body) and the non-in-use state (i.e. the state that the pin body is not upward and is lower than the bottom surface of the vehicle body), the vehicle body can be positioned in the upright state, and the pin body does not contact the vehicle body in the non-in-use state, so that the work efficiency is greatly improved.

[0016] Meanwhile, the technical scheme also has the following characteristics:

[0017] By arranging two levers for the swing lever and the air cylinders corresponding to the levers, the remote control of the flipping operation can be realized, the automatic operation can be realized, the efficiency is further improved, and the labor intensity is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings described below are only some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0019] Figure 1 is a structure schematic diagram of a tiltable positioning pin (the pin body is in a non-use state) of an embodiment of the present application;

[0020] Figure 2 is a structure schematic diagram of a tiltable positioning pin (the pin body is in a non-use state) of an embodiment of the present application;

[0021] Figure 3 is an application schematic diagram of a tiltable positioning pin of an embodiment of the present application.

[0022] The drawings show that: 1, the mounting connecting plate; 2, the base; 3, the buffer plate; 4, the second limiting plate; 5, the gland; 6, the rotating shaft; 7, the lower lever; 8, the swing lever; 9, the locking nut; 10, the butterfly spring; 11, the first limiting plate; 13, the upper lever; 14, the pin body; 15, the guide section; 20, the air cylinder; 21, the push disc; 22, the sensor support; 30, the support arm. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0024] As shown in Figure 1 , the present application provides a tiltable positioning pin, which comprises a base 2, a swing lever 8 and a pin body 14. The middle part of the swing lever 8 is hinged to the side of the base 2 through a horizontally arranged rotating shaft 6. The pin body 14 is in a cylindrical structure, and is connected to one end of the swing lever 8. The axis of the pin body 14 is perpendicular to the axis of the rotating shaft 6.

[0025] To solve the above problems, in the present application, instead of using a detachable positioning pin, a whole assembly is made. The assembly can be installed on an assembly line (for example, installed on the inner side of a support arm 30 like Figure 3 ), and the pin body 14 of the positioning pin is connected to the swing lever 8, and the swing lever 8 is connected to the base 2 of the tiltable positioning pin. In application, when the pin body 14 is in a non-use state (see Figure 2) When the body is placed, the pin body 14 can be inserted into the pin hole (positioning hole) arranged on the body, so that positioning is realized. Therefore, when the production task is switched between the body that needs to be positioned and the body that does not need to be positioned, the pin body 14 can be quickly converted between the use state and the non-use state through simple overturning operation, without disassembly and assembly operation, and the work efficiency is greatly improved.

[0026] Further, the overturnable positioning pin further comprises a first limiting plate 11 connected to the side of the base 2 and a second limiting plate 4 connected to the side of the base 2. The first limiting plate 11 and the second limiting plate 4 are located on the rotation track of the swing lever 8, that is, the two limiting plates provide two mechanical limit positions for the swing lever 8. One limit position corresponds to the use state of the pin body 14, and the other limit position corresponds to the non-use state of the pin body 14. When the front side of the swing lever 8 is in contact with the first limiting plate 11, the orientation of the pin body 14 is vertically upward (use state), so that the position of the swing lever 8 can be accurately limited during operation, and the pin body 14 cannot be aligned with the positioning hole of the body in the use state.

[0027] Further, for the non-use state, the most preferred way is to arrange the pin body 14 horizontally, that is, when the rear side of the swing lever 8 is in contact with the second limiting plate 4, the orientation of the pin body 14 is horizontal. Therefore, the included angle between the pin body 14 in the use state and the non-use state is 90°, and the included angle between the plate surface of the first limiting plate 11 and the plate surface of the second limiting plate 4 is 90°. At the same time, in order to minimize the size of the equipment, the swing lever 8 is arranged to be inclined at an angle of 45° with the vertical plane in the use state and the non-use state. At this time, as shown in FIGS. 1 and 2, the first limiting plate 11 and the second limiting plate 4 are symmetrically distributed on both sides of the rotation shaft 6. Figure 1 、 Figure 2

[0028] Further, in order to finely adjust the positions of the two limiting plates when needed, so as to ensure the accuracy of the position of the pin body 14 (mainly the vertical position in the use state), the first limiting plate 11 and the base 2 are detachably connected. The second limiting plate 4 and the base 2 are detachably connected, for example, connected by bolts.

[0029] Further, a buffer plate 3 can be arranged on the side of the first limiting plate 11 close to the swing lever 8, and a buffer plate 3 can be arranged on the side of the second limiting plate 4 close to the swing lever 8. The buffer plate 3 can be used to absorb the vibration and impact when the swing lever 8 is in contact with the corresponding limiting plate, so as to avoid the precision reduction caused by equipment damage and wear. ​

[0030] Furthermore, in order to ensure that the pin 14 remains vertical when it is in use but not inserted into the pin hole, and that it will not tilt or even flip due to equipment vibration or accidental collision, a certain clamping force should be added between the rocker arm 8 and the base 2. For this purpose, a butterfly spring 10 can be installed on the outer sleeve of the rotating shaft 6, and a pressure cover 5 can be installed on the outer sleeve of the butterfly spring 10. The pressure cover 5 is then pressed with a locking nut 9, which in turn presses the butterfly spring 10. By adjusting the locking nut 9, the butterfly spring 10 can be adjusted to a suitable elastic force, so that the rocker arm 8 is properly pressed, and will not easily shake or be difficult to move.

[0031] Furthermore, to facilitate insertion into the positioning hole, a guide section 15 can be provided at the end of the pin 14 away from the rocker arm 8. The outer diameter of the guide section 15 is smaller than the outer diameter of the rocker arm 8, and the end of the guide section 15 can also be provided with a conical surface, which is more convenient for practical application.

[0032] Furthermore, for ease of operation, an upper lever 13 is connected to the upper end of the swing arm 8, and a lower lever 7 is connected to the lower end of the swing arm 8; both the upper lever 13 and the lower lever 7 protrude horizontally from the outer side of the swing arm 8. At this time, the swing arm 8 can be rotated by moving the corresponding lower lever 7, without having to directly move the swing arm 8 itself.

[0033] Furthermore, to further enhance the level of automation, two horizontally positioned cylinders 20 can be installed in the tilting positioning pin (the cylinders 20 can be directly connected to the base 2, but this will inevitably lead to a significant increase in the volume of the base 2, therefore, it can be like...). Figure 3 As shown, cylinder 20 is mounted on a bracket in the middle of a set of support arms 30 (it is only necessary to ensure the relative positional relationship between cylinder 20 and lever). The two cylinders 20 are spaced apart vertically and are both located on the same side of the rocker arm 8. The axis of cylinder 20 is perpendicular to the axis of rotating shaft 6. The piston rod end of cylinder 20 is also connected to a disc-shaped push plate 21 (the area of ​​push plate 21 is larger than the area of ​​piston rod end, since the trajectories of upper lever 13 and lower lever 7 are both arcs when rocker arm 8 rotates). This ensures that the push plate 21 always contacts the corresponding lever. When the upper cylinder 20 extends or retracts, the upper lever 13 contacts the upper push plate 21; when the lower cylinder 20 extends or retracts, the lower lever 7 contacts the lower push plate 21. Thus, the action of the cylinder 20 pushes the upper lever 13 or the lower lever 7, causing the swing arm 8 to swing to the first limit position (i.e., the pin 14 is in the active state) or the second limit position (the pin 14 is in the inactive state). At this time, remote operation can be achieved, eliminating the need for staff to manually switch states on-site, greatly reducing labor intensity.

[0034] Further, the tiltable positioning pin further comprises a position sensor (for example, a proximity switch) for detecting the position of the lower push lever 7. Since the swing lever 8 has two limit positions, two position sensors are generally required to be arranged. When the first sensor is triggered, the sensor feeds back a signal to the control system (not shown in the figure), so that the control system knows that the pin body 14 enters the service state (vertical upward state) at this time, and the production line can produce the vehicle body that needs accurate positioning. When the second sensor is triggered, the second sensor feeds back a signal to the control system, so that the control system knows that the pin body 14 enters the hidden state (the pin body 14 is pulled down) at this time, and the vehicle body that does not need positioning can be produced at this time.

[0035] One specific embodiment of the present application is shown in the drawings. Figure 3 As shown, the base 2 is provided with a mounting connecting plate 1 with a bolt hole. The tiltable positioning pin can be connected with a support arm 30 on the assembly line through a bolt. The support arm 30 is used to support the vehicle body, and the tiltable positioning pin is used to provide positioning service for the vehicle body. Before the vehicle body that needs accurate positioning is assembled, the control system gives an action signal to the lower air cylinder 20, and the piston rod of the air cylinder 20 extends (the initial state of the two air cylinders 20 is retracted), and the push disc 21 at the end of the piston rod contacts and pushes the lower push lever 7, so that the swing lever 8 rotates in the counterclockwise direction from outside to inside. Figure 3 When the front side of the swing lever 8 is in close contact with the buffer plate 3 on the first limit plate 11, the lower push lever 7 moves above the position sensor (the position sensor is mounted on the sensor bracket 22) on the outer side and triggers the position sensor, and at this time, the position sensor feeds back a signal to the control system, and the control system sends an action signal to make the piston rod of the air cylinder 20 retract. At this time, the swing lever 8 is in the first limit position, the orientation of the pin body 14 is vertical upward, the pin body 14 enters the service state, and can be used for positioning the vehicle body. Conversely, when the vehicle body that does not need positioning is assembled, the control system gives an action signal to the upper air cylinder 20, and the piston rod of the air cylinder 20 extends, and the push disc 21 at the end of the piston rod contacts and pushes the upper push lever 13, so that the swing lever 8 rotates in the clockwise direction from inside to outside. Figure 3 When the rear side of the swing lever 8 is in close contact with the buffer plate 3 on the second limit plate 4, the lower push lever 7 moves above the position sensor on the inner side and triggers the position sensor, and at this time, the position sensor feeds back a signal to the control system, and the control system sends an action signal to make the piston rod of the upper air cylinder 20 retract. At this time, the swing lever 8 is in the second limit position, the pin body 14 is in the non-service state, and no longer provides positioning service, and at this time, the pin body 14 is located below the bottom surface of the vehicle body, and does not affect the normal production.

[0036] In the above detailed description, various features are combined together in a single embodiment to simplify this disclosure. This approach to disclosure should not be construed as reflecting an intention that embodiments of the claimed subject matter require more features than are explicitly stated in each claim. Rather, as reflected in the appended claims, the invention is presented with fewer features than all of the features in a single disclosed embodiment. Therefore, the appended claims are hereby explicitly incorporated into the detailed description, with each claim representing a separate preferred embodiment of the invention.

[0037] The disclosed embodiments have been described above to enable any person skilled in the art to implement or use this invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments without departing from the spirit and scope of this disclosure. Therefore, this disclosure is not limited to the embodiments given herein, but is consistent with the widest scope of the principles and novel features disclosed in this application.

[0038] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A tip-pable dowel pin characterized by, The base (2), the swing lever (8) and the pin body (14), the middle part of the swing lever (8) is hinged to the side of the base (2) through the horizontal pivot (6), the pin body (14) is a cylindrical structure, and the pin body (14) is connected to one end of the swing lever (8); the axis of the pin body (14) is perpendicular to the axis of the pivot (6).

2. The knock-over dowel pin of claim 1 wherein, It also includes a first limiting plate (11) connected to the side of the base (2) and a second limiting plate (4) connected to the side of the base (2), the first limiting plate (11) and the second limiting plate (4) are located on the rotation track of the swing lever (8); when the front side of the swing lever (8) is in contact with the first limiting plate (11), the orientation of the pin body (14) is vertically upward.

3. The knock-over dowel pin of claim 2, wherein, The angle between the plate surface of the first limiting plate (11) and the plate surface of the second limiting plate (4) is 90°, and the first limiting plate (11) and the second limiting plate (4) are symmetrically distributed on both sides of the pivot (6); when the rear side of the swing lever (8) is in contact with the second limiting plate (4), the orientation of the pin body (14) is horizontal.

4. The knock-over dowel pin of claim 3 wherein, The first limiting plate (11) and the base (2) are detachably connected; the second limiting plate (4) and the base (2) are detachably connected.

5. The knock-over dowel pin of claim 3 wherein, The side surface of the first limiting plate (11) close to the swing lever (8) is connected with a buffer plate (3), and the side surface of the second limiting plate (4) close to the swing lever (8) is connected with a buffer plate (3).

6. The knock-over dowel pin of claim 2 wherein, The pivot (6) is further sleeved with a butterfly spring (10), the outer side end of the pivot (6) is a threaded end, the threaded end is screwed with a locking nut (9), and the butterfly spring (10) is located between the swing lever (8) and the locking nut (9).

7. The knock-over dowel pin of claim 2 wherein, The end of the pin body (14) away from the swing lever (8) further comprises a guide section (15), the outer diameter of the guide section (15) is smaller than the outer diameter of the swing lever (8), and the end of the guide section (15) is further provided with a conical surface.

8. The knock-over dowel pin of claim 2 wherein, The upper end of the swing lever (8) is connected with an upper lever (13), and the lower end of the swing lever (8) is connected with a lower lever (7); the upper lever (13) and the lower lever (7) both protrude outward from the swing lever (8) in the horizontal direction.

9. The knock-over dowel pin of claim 8, wherein, It also includes two horizontally arranged air cylinders (20), the two air cylinders (20) are arranged in an upper and lower spaced manner and are located on the same side of the swing lever (8), the axis of the air cylinder (20) is perpendicular to the axis of the pivot (6), the piston rod end of the air cylinder (20) is further connected with a disc-shaped push disc (21), when the upper air cylinder (20) is stretched and contracted, the upper lever (13) can be in contact with the upper push disc (21), and when the lower air cylinder (20) is stretched and contracted, the lower lever (7) can be in contact with the lower push disc (21).

10. The knock-over dowel pin of claim 9, wherein, It also includes a position sensor for detecting the position of the lower lever (7).

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