CN202684399U - Clamping type locating pin - Google Patents

Abstract

The utility model discloses a clamping positioning pin, which aims to provide a positioning pin capable of stably positioning and clamping a workpiece with a narrow welding channel or a closed cavity structure, and simultaneously clamping and positioning can be realized on the same device , which simplifies the fixture and saves space. It includes a support seat and a pressure plate guide seat fixed on the top of the support seat. The top of the pressure plate guide seat is fixed with a positioning pin. The pressure plate guide seat is provided with an opening for the pressure plate A chute that slides up and down, the inside of the positioning pin is provided with a side opening groove communicating with the chute, the top of the pressure plate is bent to form a pressure head that can protrude from the side opening groove, and the bottom of the positioning pin is provided with The positioning platform, the lower end of the pressing plate is connected with the transmission mechanism that can control the upward and downward movement of the pressing plate.

Description

Clamping dowel

technical field

The utility model belongs to the field of automobile body welding, in particular to a positioning device on a body welding production line. 

Background technique

In the automatic welding production line of automobiles, special welding fixtures are required to position and clamp the body-in-white, etc. The positioning pins and clamping mechanisms used in the welding fixtures are usually designed separately. This separate structure will Occupies a lot of space, it is difficult to apply in the case of relatively small space, especially when the surface of the workpiece to be pressed is in a closed structure, or the workpiece is a cavity structure, such as the longitudinal beam of the cabin, due to the rear floor side beam A cavity structure is formed between the rear floor and the pressing block of the fixture cannot press the corresponding positioning block, so it is difficult for the fixture to clamp the workpiece, and the unstable positioning will easily cause large errors in the subsequent process.

China Patent Authorization Announcement No.: CN 2908891Y, authorized announcement date June 6, 2007, discloses a locating pin, the locating pin includes a pin head and a pin post, the pin head and the pin post are fixedly connected together or as a whole, Wherein, the positioning pin has one of the following structures or a combination of them: there is at least one exhaust groove or plane on the cylinder surface of the pin; There is at least one exhaust through hole on the axis. When the positioning pin of this utility model is applied in the body welding jig, a clamping device needs to be set up, which takes up a large space. At the same time, due to the limitation of the part structure, the pressing block in the jig cannot press the positioning block, which makes positioning difficult. .

Contents of utility model

The utility model aims at overcoming the deficiency of the prior art that the vehicle body cannot be firmly clamped during welding, and provides a clamping positioning pin which is convenient for positioning and clamping and occupies less space.

In order to achieve the above object, the utility model adopts the following technical solutions:

A clamping positioning pin of the utility model comprises a support base and a pressure plate guide seat fixed on the top of the support base, a positioning pin is fixed on the top of the pressure plate guide seat, and the pressure plate guide seat is provided with an opening, A chute for the pressing plate to slide up and down. The inside of the positioning pin is provided with a side opening slot communicating with the chute. The top of the pressing plate is bent to form a pressure head that can protrude from the side opening slot. The positioning pin A positioning platform is provided at the bottom, and the lower end of the pressing plate is connected with a transmission mechanism that can control the up and down movement of the pressing plate. The chute of the guide seat of the pressure plate and the side opening groove of the positioning pin are connected with each other, the pressure plate can move up and down in the chute and the side opening groove driven by the transmission mechanism, and the pressure head on the top of the pressure plate can press the workpiece on the positioning table, Play the role of pressing the workpiece. Therefore, after the positioning pin passes through the positioning hole of the workpiece, the workpiece is positioned through the positioning table, and the transmission mechanism is used to pull the pressing plate to move downward, and the pressure head and the positioning table can clamp the workpiece.

Preferably, the pressing plate is provided with a chute, and the chute is provided with a limit pin fixedly connected with the guide seat of the pressing plate. A chute is set on the pressure plate, and a limit pin is inserted in the chute to limit the range and position of the pressure plate when it moves up and down. When the pressure plate moves upward, the pressure head can be retracted into the positioning pin. When the pressure plate When moving downward, the pressure head extends out of the side opening slot and cooperates with the positioning table to compress the workpiece.

Preferably, the transmission mechanism includes a handle whose one end is movably connected to the support base, the other end can be flipped up and down, and a pull rod movably connected to the lower end of the pressing plate, and a connecting rod is provided between the middle part of the handle and the lower end of the pull rod. The handle can rotate up and down around the connection with the support seat, and the connecting rod drives the pull rod to move, so that the pressing plate can perform the pressing and loosening movements.

Preferably, the support base is provided with a guide plate for guiding the pull rod. The pull rod moves in the vertical direction all the time through the action of the guide plate, so as to avoid horizontal shaking of the pull rod.

Preferably, the positioning pin is bolted to the guide seat of the pressing plate. The locating pin can be removed from the guide seat of the pressing plate. After a period of use, the locating pin wears a lot, and the operation of replacing the locating pin is more convenient. In addition, different locating pins can be used for the positioning of different workpieces, which improves the versatility.

As a preference, a cover plate is provided on the outer side of the chute of the pressure plate guide seat, and a fixing groove matched with the limit pin is provided on the inner surface of the cover plate, and the cover plate is bolted to the pressure plate guide seat. The cover plate covers one side of the opening of the chute, so that the pressing plate will not be exposed, and the pressing plate can be protected.

Preferably, an adjusting gasket is provided between the positioning pin and the guide seat of the pressing plate. For workpieces with different thicknesses, adjusting gaskets of different thicknesses can be used to adjust the distance between the indenter and the positioning table, so it can adapt to workpieces with different wall thicknesses and improve the versatility.

Therefore, the utility model has the following beneficial effects: the workpiece with a narrow welding channel or a closed cavity structure can be stably positioned and clamped, and the clamping and positioning can be realized on the same device at the same time, which simplifies the fixture and saves space.

Description of drawings

Fig. 1 is a kind of structural representation of the utility model.

Fig. 2 is a sectional view of the utility model.

Among the figure, positioning pin 1, pressing plate 2, support seat 3, pressing plate guide seat 4, pull bar 5, handle 6, connecting rod 7, guide plate 8, cover plate 9, limit pin 10, positioning platform 11.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described.

In the embodiment shown in Figure 1 and Figure 2, a clamping positioning pin is provided with a pressure plate guide seat 4 on the top of the support seat 3, and the pressure plate guide seat 4 positions its bottom surface through the steps on the support seat 3 , is fixedly connected with the support base 3 by bolts. A chute provided on the outer side of the pressure plate guide seat 4, a cover plate 9 is provided on the outside of the chute of the pressure plate guide seat 4, and a positioning pin 1 is fixed on the top of the pressure plate guide seat 4 by bolts. The inside of the positioning pin 1 is provided with a side opening groove communicating with the chute. The pressure plate 2 can slide up and down in the chute and the side opening groove. Stretch out, the bottom of positioning pin 1 is provided with positioning platform 11, and the workpiece is clamped through the cooperation of pressure head 2 and positioning platform 11. There is a chute on the pressing plate 2, and a limit pin 10 is arranged in the chute. The corresponding positions of the cover plate 9 are respectively provided with fixing grooves for fixing the limit pins 10 . The lower end of the pressing plate 2 is connected to the pull rod 5 through a pin shaft, and a guide plate 8 is arranged between the pull rod 5 and the support seat 3 to limit the movement direction of the pull rod 5 and prevent the pull rod 5 from swinging. The lower end of the pull rod 5 is connected to the connecting rod 7 through a pin shaft, and the other end of the connecting rod 7 is connected to the middle part of the handle 6 by a pin shaft. Movement, so that the pressure plate 2 slides up and down to achieve the compression and release of the workpiece.

In actual use, usually multiple positioning pins are used to position the workpiece. Initially, the pressing plate 2 is in a loose state, the handle 6 is located on the upper side, and the pressing head on the pressing plate 2 is located inside the side opening groove of the positioning pin 1, and does not extend out of the side opening groove. At this time, the workpiece is installed on the positioning pin 1 through the positioning hole, the workpiece is initially positioned through the positioning table 11, and then the handle 6 is pulled to rotate downward, and the pressure plate 2 is moved downward through the action of the connecting rod 7 and the pull rod 5, and the pressure plate 2 The chute on the top is limited by the limit pin 10, so it can only slide along the limit pin 10. The pressure head on the top of the pressure plate 2 protrudes from the side opening groove, and presses the workpiece tightly against the positioning table under the positioning pin 1. 11 on. After the welding is completed, pull the handle 6 to rotate upwards, thereby driving the pressing plate 2 to move upwards, and the pressure head of the pressing plate 2 gradually retreats into the positioning pin 1, and then the workpiece can be taken out from the positioning pin 1 smoothly.

Claims (7)

1. clamped-in style alignment pin, it is characterized in that, the pressing plate guide holder (4) that it comprises supporting seat (3) and is fixed on supporting seat (3) top, described pressing plate guide holder (4) top is fixed with alignment pin (1), described pressing plate guide holder (4) is provided with an opening, but the chute that supply plate (2) slides up and down, the inside of described alignment pin (1) is provided with the side open groove that communicates with chute, described pressing plate (2) top is bent to form the pressure head that can stretch out from side open groove, described alignment pin (1) bottom is provided with positioning table (11), and described pressing plate (2) lower end links to each other with the transmission mechanism that controlled superzapping plate (2) moves up and down.

2. clamped-in style alignment pin according to claim 1 is characterized in that, described pressing plate (2) is provided with skewed slot, is provided with the spacer pin (10) that is fixedly connected with pressing plate guide holder (4) in the described skewed slot.

3. clamped-in style alignment pin according to claim 1 and 2, it is characterized in that, described transmission mechanism comprises an end and the handle (6) that supporting seat (3) is flexibly connected, the other end can spin upside down, and the pull bar (5) that is flexibly connected with pressing plate (2) lower end, the connecting rod (7) that is provided with between the middle part of described handle (6) and pull bar (5) lower end.

4. clamped-in style alignment pin according to claim 3 is characterized in that, described supporting seat (3) is provided with the guide plate (8) that pull bar (5) is play the guiding role.

5. clamped-in style alignment pin according to claim 1 is characterized in that, described alignment pin (1) is connected with pressing plate guide holder (4) bolt.

6. clamped-in style alignment pin according to claim 1, it is characterized in that, the chute outside of described pressing plate guide holder (4) is provided with cover plate (9), described cover plate (9) medial surface is provided with the holddown groove that matches with spacer pin (10), and described cover plate (9) is connected with pressing plate guide holder (4) bolt.

7. according to claim 1 and 2 or 5 or 6 described clamped-in style alignment pins, it is characterized in that, be provided with the adjusting pad between described alignment pin (1) and the pressing plate guide holder (4).

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