Switchable positioning pin mechanism and spreader

Abstract

The utility model relates to a kind of switchable positioning pin mechanism and spreader, switchable positioning pin mechanism includes: base, top is provided with sliding slot;Positioning pin assembly, including the sliding block of the sliding connection with the sliding slot, the positioning pin of being installed on the sliding block, the positioning block of being provided at the bottom of the sliding block and having several side-by-side distribution's positioning hole, the positioning channel of being provided at the side wall of the base;And pass through the positioning channel of the base and insert the positioning hole to make the fixed position of the positioning pin switch shaft, when moving the sliding block makes the switch shaft insert different positioning hole, the switching of the position of the positioning pin is realized.Compared with prior art, the utility model has the advantages of quick switching positioning position, realizing accurate positioning, small size, high structural strength and the like.

Description

Technical Field

[0001] This utility model relates to the field of lifting equipment technology, and in particular to a switchable positioning pin mechanism and lifting equipment. Background Technology

[0002] Positioning pins on lifting fixtures are primarily used to achieve precise workpiece positioning, prevent displacement, and ensure assembly or transportation safety; they are key positioning components in lifting equipment. Positioning pins engage with pre-set holes on the workpiece (such as a car body or mechanical component) to ensure the workpiece's precise position on the lifting fixture. For example, in an automotive assembly line, positioning pins are inserted into positioning holes in the chassis to maintain a fixed relative position between the car body and the lifting fixture, preventing deviations caused by shaking during assembly. To accommodate different workpiece models, lifting fixtures may be equipped with retractable or switchable positioning pin assemblies.

[0003] Currently, in the automotive manufacturing industry, existing technologies employ complex mechanical linkage structures to achieve the movement and fixation of positioning pins. Patent publication number CN106629018A discloses a trolley positioning pin switching system. The mechanical positioning pin locking mechanism includes a drive assembly with a return spring located in the middle and two linkage mechanisms located on both sides. The two linkage mechanisms are hinged together. By pressing down on the hinge point between the two linkage mechanisms with external force, the two linkage mechanisms move towards each other, causing the ends of the two linkage mechanisms to disengage from the wedge-shaped groove of the wedge-shaped base, and compressing the return spring, thereby disengaging the mechanical positioning pin locking mechanism from the wedge-shaped base. When the external force is removed, the drive assembly moves upward under the restoring force of the return spring. At this time, the two linkage mechanisms move away from each other, causing the ends of the two linkage mechanisms to extend into the wedge-shaped groove of the wedge-shaped base, achieving locking between the mechanical positioning pin locking mechanism and the wedge-shaped base. However, this structure is not only bulky but also has significant shortcomings in precision control and ease of maintenance. Utility Model Content

[0004] The purpose of this utility model is to overcome the defects of the prior art by providing a switchable positioning pin mechanism and lifting device, which can quickly switch the positioning position and achieve precise positioning.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] In one aspect, this utility model provides a switchable positioning pin mechanism, comprising:

[0007] The base has a sliding groove on the top.

[0008] The positioning pin assembly includes a slider slidably connected to the slide groove, a positioning pin disposed on the slider, and a positioning block disposed on the bottom of the slider and having a plurality of positioning holes arranged side by side.

[0009] The positioning channel is provided on the side wall of the base;

[0010] And a switching shaft that passes through the positioning channel of the base and is inserted into the positioning hole to fix the position of the positioning pin. When the slider is moved to insert the switching shaft into different positioning holes, the position of the positioning pin is switched.

[0011] Furthermore, the switching axis includes:

[0012] Switch axis body;

[0013] A retractable spring pin is provided on the surface of the switching shaft body and can extend to press against the positioning block;

[0014] And a boss located at the outer end of the switching shaft body.

[0015] Furthermore, the switching shaft body and the boss are provided with grooves, which are arranged along the axial direction of the switching shaft and extend from the middle of the switching shaft body to the end of the boss.

[0016] The base sidewall is detachably connected to a limiting block for restricting the rotation of the switching shaft, and its bottom is provided with a protrusion that matches the groove.

[0017] Furthermore, the positioning channel includes, from the inside out, a first channel segment, a second channel segment, and a third channel segment connected end to end. The diameters of the first channel segment and the third channel segment are larger than the diameter of the second channel segment, and the end of the third channel segment is provided with a stop to prevent the switching shaft from being pulled out.

[0018] Furthermore, the side of the positioning channel is provided with a pull-out channel for the switching shaft to be pulled out and pass through the first channel segment, the second channel segment, and the third channel segment.

[0019] Furthermore, two positioning holes are provided, and the distance between the two positioning holes is equal to the difference between the length of the slide groove and the length of the slider and the slide groove.

[0020] Furthermore, the distance between the two positioning holes is 1~5cm, which is the distance for switching the positioning pin.

[0021] Furthermore, the base is provided with several set screws at both ends that can abut against the positioning block.

[0022] Furthermore, dust covers are provided at both ends of the base to cover the slide groove.

[0023] Furthermore, the slider has an inverted T-shaped structure.

[0024] On the other hand, the present invention also provides a lifting device, which includes the aforementioned switchable positioning pin mechanism, and further includes a lifting device support and a rotating arm mounted on the lifting device support and rotatable, wherein the switchable positioning pin mechanism is mounted on the end of the rotating arm.

[0025] Furthermore, the spreader support is provided with a coarse positioning hole for coarse positioning, which is matched and connected with the positioning rod on the switching station. After coarse positioning, precise positioning switching is performed through the positioning pin assembly.

[0026] Furthermore, the end of the rotating arm without the positioning pin assembly is provided with several third through holes, and the lifting support is provided with a pin for inserting into the third through holes to fix the position of the rotating arm.

[0027] Compared with the prior art, the present invention has the following advantages:

[0028] (1) The switchable positioning pin mechanism of this utility model switches the positioning pin by moving the slider in the linear motion of the slide groove. It is small in size, has high positioning accuracy, and can realize the fixed switching of different workpieces with a distance difference of 1~5cm. Its shaking error is ≤1mm.

[0029] (2) The present invention achieves high load-bearing capacity through a simple structure. The present invention can bear a horizontal force of approximately 500-600 kg.

[0030] (3) The switchable positioning pin mechanism of this utility model can be obtained by modifying the structure on the existing lifting device without expanding the original size space, avoiding interference with other assembly process equipment on the line, and the modification cost is low. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the switchable positioning pin mechanism shown in Example 1;

[0032] Figure 2 This is a structural schematic diagram of the switchable positioning pin mechanism shown in Example 1 from another perspective;

[0033] Figure 3 This is a schematic diagram of the positioning pin assembly shown in Example 1;

[0034] Figure 4 This is a schematic diagram of the switching shaft shown in Example 1;

[0035] Figure 5 This is a schematic diagram of the limiting block shown in Example 1;

[0036] Figure 6 This is a schematic diagram of the base shown in Example 1;

[0037] Figure 7 This is a structural schematic diagram of the base shown in Example 1 from another perspective;

[0038] Figure 8 This is a schematic diagram of the internal structure of the base shown in Example 1;

[0039] Figure 9 This is a schematic diagram of the lifting device shown in Example 2;

[0040] Figure 10 for Figure 9 An enlarged schematic diagram of part A in the middle.

[0041] Explanation of markings in the diagram:

[0042] 1-Base, 11-Slide groove, 12-Second through hole;

[0043] 2-Locking pin assembly, 21-Slider, 22-Locking pin, 23-Locking block, 231-Locking hole;

[0044] 3-Positioning channel, 31-First channel segment, 32-Second channel segment, 33-Third channel segment, 331-Stop, 34-Pull-out channel;

[0045] 4-Switching shaft, 41-Switching shaft body, 42-Spring pin, 43-Boss, 431-Groove;

[0046] 5-Limiting block, 51-Protrusion, 52-First through hole;

[0047] 6-Top screw;

[0048] 7-Dust cover;

[0049] 81-Lifting device support, 82-Swivel arm, 821-Third through hole, 83-Rough positioning hole, 84-Pin Detailed Implementation

[0050] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The embodiments are implemented based on the technical solution of the present invention, providing detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments. In the following embodiments or examples, unless otherwise specified, the functional components or structures are conventional components or structures used in the art to achieve the corresponding functions.

[0051] It should be noted that in the description of this utility model, the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0052] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0053] In the description of this utility model, it should be noted that "both ends" and "ends" refer to the direction of movement of the slider within the slider, and "side" and "side wall" refer to the direction perpendicular to the direction of movement of the slider within the slider in the horizontal plane.

[0054] Example 1

[0055] A switchable positioning pin mechanism, such as Figures 1-3 As shown, it includes:

[0056] Base 1, with a sliding groove 11 on the top;

[0057] The positioning pin assembly 2 includes a slider 21 slidably connected to the slide groove 11, a positioning pin 22 disposed on the slider 21, and a positioning block 23 disposed at the bottom of the slider 21 and having a plurality of positioning holes 231 arranged side by side.

[0058] Positioning channel 3 is provided on the side wall of the base 1;

[0059] And a switching shaft 4 that passes through the positioning channel 3 of the base 1 and is inserted into the positioning hole 231 to fix the position of the positioning pin 22. When the slider 21 is moved to insert the switching shaft 4 into different positioning holes 231, the position of the positioning pin 22 is switched.

[0060] In this embodiment, the slider 21, the positioning pin 22, and the positioning block 23 are an integrated structure.

[0061] In this embodiment, as Figure 4 As shown, the switching axis 4 includes:

[0062] Switch axis body 41;

[0063] A retractable spring pin 42 is disposed on the surface of the switching shaft body 41 and can extend to press against the positioning block 23;

[0064] And a boss 43 provided at the outer end of the switching shaft body 41.

[0065] In this embodiment, a groove 431 is provided at the switching shaft body 41 and the boss 43. The groove 431 is arranged along the axial direction of the switching shaft 4 and extends from the middle of the switching shaft body 41 to the end of the boss 43.

[0066] The base 1 has a detachable limiting block 5 on its side wall to restrict the rotation of the switching shaft 4, and its bottom is provided with a protrusion 51 that matches the groove 431, such as... Figure 5 As shown.

[0067] In this embodiment, the limiting block 5 is provided with a first through hole 52 for the bolt to pass through and fix, and the side wall of the base 1 is provided with a second through hole 12 for the bolt to pass through, so that the limiting block 5 and the side wall of the base 1 are connected by bolts.

[0068] In this embodiment, as Figures 6-8 As shown, the positioning channel 3 includes, from the inside out, a first channel segment 31, a second channel segment 32, and a third channel segment 33 connected end to end. The diameters of the first channel segment 31 and the third channel segment 33 are larger than the diameter of the second channel segment 32, and the end of the third channel segment 33 is provided with a stop 331 to prevent the switching shaft 4 from being pulled out.

[0069] In this embodiment, the side of the positioning channel 3 is provided with a pull-out channel 34 for the switching shaft 4 to be pulled out and pass through the first channel segment 31, the second channel segment 32, and the third channel segment 33.

[0070] In this embodiment, two positioning holes 231 are provided, and the distance between the two positioning holes 231 is equal to the difference between the length of the slide groove 11 and the length of the slider 21 and the slide groove 11.

[0071] In this embodiment, the distance between the two positioning holes 231 is 2cm, which is the distance at which the positioning pin 22 switches. That is, when positioning is performed by the positioning pin 22, the two different positioning distances differ by 2cm.

[0072] In this embodiment, the base 1 has several set screws 6 at both ends that can abut against the positioning block 23. Once the position of the set screws 6 is determined, the set screws 6 are fixed with thread-locking adhesive.

[0073] In this embodiment, the base 1 has screw holes at both ends, and the set screw 6 passes through the screw holes.

[0074] In this embodiment, the installation process of the set screw 6 is as follows:

[0075] Taking the installation of the set screw 6 at the left end of the base 1 as an example, move the slider 21 to the left end of the slide groove 11, apply threadlocker to the screw hole, and screw the set screw 6 into the screw hole so that the end of the set screw 6 abuts against the end of the positioning block 23. Then, insert the switching shaft 4 so that it passes through the positioning channel 3, and adjust the position of the set screw 6 until it smoothly inserts into the positioning hole 231 at the right end of the positioning block 23, thus completing the installation of the set screw 6. The entire installation process must be carried out while the threadlocker is still wet. This process can further improve the positioning accuracy of the entire switchable positioning pin mechanism.

[0076] Similarly, the set screw 6 at the left end of the base 1 is installed by moving the slider 21 to the right end of the slide groove 11, applying threadlocker to the screw hole, and screwing the set screw 6 into the screw hole so that the end of the set screw 6 abuts against the end of the positioning block 23. Then, insert the switching shaft 4 so that it passes through the positioning channel 3, and adjust the position of the set screw 6 until it smoothly inserts into the positioning hole 231 at the left end of the positioning block 23, thus completing the installation of the set screw 6. The entire installation process must be performed while the threadlocker is still wet. This process can further improve the positioning accuracy of the entire switchable positioning pin mechanism.

[0077] In this embodiment, dust covers 7 are provided at both ends of the base 1 to cover the slide groove 11, so as to prevent external dust from falling into the slide groove 11 and thus affecting the positioning accuracy.

[0078] In this embodiment, the slider 21 has an inverted T-shaped structure, which allows the slider 21 to withstand forces from both sides and ends, resulting in good load-bearing capacity.

[0079] In this embodiment, the working process of the switchable positioning pin mechanism is as follows:

[0080] Insert the slider 21 into the groove 11, install the dust covers 7 on both sides of the base 1, and install the set screw 6. Align the spring pin 42 of the switching shaft 4 with the pull-out channel 34, insert the switching shaft 4 into the base 1, and rotate the switching shaft 4 so that the spring pin 42 faces upward. At this time, insert the protrusion 41 of the limiting block 5 into the groove 431 of the boss 43, and fix the limiting block 5 to the side wall of the base 1 with the bolt. Move the slider 21 to one end of the groove 11, insert the switching shaft 4 into the positioning hole 231 at the other end, so that the spring pin 42 abuts against the inner wall of the positioning hole 23 while the switching shaft 4 is positioned, thus positioning the positioning pin 22 and the workpiece.

[0081] When it is necessary to switch the position of the positioning pin 22 to position another workpiece, the switching shaft 4 is pulled outward. During the outward pulling process, the spring pin 42 automatically extends and retracts to abut against the inner wall of the positioning channel 3. When it moves to the stop block 331, it reaches the maximum distance that the switching shaft 4 can move, so that the switching shaft 4 can move without falling out due to excessive movement. Slide the slider 21 to move to the other end of the slide groove 11, and insert the switching shaft 4 into another positioning hole 231 to position the positioning pin 22 and the workpiece.

[0082] When maintenance is required, the bolts are removed and the limiting block 5 is removed, so that the switching shaft 4 can rotate. When the spring pin 42 rotates to the pull-out channel 34, the spring pin 42 can be pulled out smoothly.

[0083] Example 2

[0084] A type of lifting device, such as Figure 9 and 10 As shown, it includes a switchable positioning pin mechanism as described in Embodiment 1, and also includes a lifting support 81 and a rotating arm 82 mounted on the lifting support 81 and rotatable, with the switchable positioning pin mechanism installed at the end of the rotating arm 82.

[0085] In this embodiment, the lifting support 81 is provided with a coarse positioning hole 83 for coarse positioning, which is matched and connected with the positioning rod on the switching station. After coarse positioning, precise positioning switching is performed through the positioning pin assembly 2.

[0086] In this embodiment, the end of the rotating arm 82 without the positioning pin assembly is provided with a plurality of third through holes 821, and the lifting support 81 is provided with a pin 84 for inserting into the third through holes 821 and fixing the position of the rotating arm 82.

[0087] When using the lifting device, it is first matched and connected to the positioning rod on the switching station through the coarse positioning hole 83 for coarse positioning. After coarse positioning, the rotating arm 82 is rotated and the pin 84 is inserted into one of the third through holes 821 to fix the rotating arm 82 for further positioning; finally, precise positioning is achieved through the positioning pin assembly 2.

[0088] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.

Claims

1. A switchable positioning pin mechanism, characterized in that, include: The base (1) has a sliding groove (11) on the top. The positioning pin assembly (2) includes a slider (21) slidably connected to the slide groove (11), a positioning pin (22) disposed on the slider (21), and a positioning block (23) disposed at the bottom of the slider (21) and having a plurality of positioning holes (231) arranged side by side. Positioning channel (3) provided on the side wall of the base (1); And a switching shaft (4) that passes through the positioning channel (3) of the base (1) and is inserted into the positioning hole (231) to fix the position of the positioning pin (22). When the slider (21) is moved to insert the switching shaft (4) into different positioning holes (231), the position of the positioning pin (22) is switched.

2. The switchable positioning pin mechanism according to claim 1, characterized in that, The switching axis (4) includes: Switch the shaft body (41); A retractable spring pin (42) is provided on the surface of the switching shaft body (41) and can extend to abut against the positioning block (23). And a boss (43) provided at the outer end of the switching shaft body (41).

3. The switchable positioning pin mechanism according to claim 2, characterized in that, The switching shaft body (41) and the boss (43) are provided with grooves (431). The base (1) has a detachable limit block (5) on its side wall for limiting the rotation of the switching shaft (4), and a protrusion (51) matching the groove (431) is provided at its bottom.

4. The switchable positioning pin mechanism according to claim 1, characterized in that, The positioning channel (3) includes, from the inside out, a first channel segment (31), a second channel segment (32), and a third channel segment (33) connected end to end. The diameters of the first channel segment (31) and the third channel segment (33) are larger than the diameter of the second channel segment (32), and the end of the third channel segment (33) is provided with a stop (331) to prevent the switching shaft (4) from being pulled out.

5. A switchable positioning pin mechanism according to claim 4, characterized in that, The positioning channel (3) is provided with a pull-out channel (34) on the side for the switching shaft (4) to be pulled out and pass through the first channel segment (31), the second channel segment (32), and the third channel segment (33).

6. The switchable positioning pin mechanism according to claim 1, characterized in that, There are two positioning holes (231), and the distance between the two positioning holes (231) is equal to the difference between the length of the slide groove (11) and the length of the slider (21) and the slide groove (11).

7. The switchable positioning pin mechanism according to claim 1, characterized in that, The base (1) has several set screws (6) at both ends that can abut against the positioning block (23).

8. The switchable positioning pin mechanism according to claim 1, characterized in that, The base (1) is provided with dust covers (7) at both ends for covering the slide (11).

9. A switchable positioning pin mechanism according to claim 1, characterized in that, The slider (21) has an inverted T-shaped structure.

10. A lifting device, characterized in that, It includes a switchable positioning pin mechanism as described in any one of claims 1 to 9, and further includes a lifting support (81) and a rotating arm (82) mounted on the lifting support (81) and rotatable, wherein the switchable positioning pin mechanism is mounted on the rotating arm (82).

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