CN220260807U - Quick-change type self-clamping device for positioning pin - Google Patents

Abstract

The utility model provides a quick change locating pin is from clamping device, which comprises a base, the locating pin, a drive arrangement, the base center is equipped with an axial through-hole, a push rod clearance fit is in the axial through-hole, the piston fixed connection of drive arrangement of push rod lower extreme and base lower extreme, the locating pin is connected through quick change locking mechanism to the upper end of base, the locating pin is upper and lower end little middle section big step shaft, the lower extreme is the connecting portion that are used for inserting quick change locking mechanism, the upper end is the center reference column that is used for inserting the work piece hole, the center reference column is equipped with the side open-ended and accomodates the groove, accomodate the groove and the step shaft hole intercommunication that the locating pin set up, accomodate the groove and hinge a joint block tongue through the round pin axle, the gap is joined in marriage a ejector pin in the step shaft hole of locating pin, ejector pin lower extreme and push rod upper end contact, the lower extreme of block tongue is equipped with first direction arc, this first direction arc contacts with the ejector pin, drive arrangement promotes the ejector pin upward movement through the push rod, drive the other end of block tongue stretches out the opening of accomodate groove, form the location locking to the work piece.

Description

Quick-change type self-clamping device for positioning pin

Technical Field

The utility model relates to the field of automobile assembly, in particular to a quick-change type positioning pin self-clamping device used during assembly of a door lining plate.

Background

At present, when assembling parts, the door lining plate is usually fixed on a tool substrate by adopting a tool fixture, the tool fixture comprises a locating pin, a base and a driving device, wherein the locating pin and the base are integrally formed, and a push rod inside the locating pin is fixedly connected with a push rod of the base.

Disclosure of Invention

The utility model aims at solving the problems in the prior art, and provides a quick-change type positioning pin self-clamping device, which is characterized in that a positioning pin is connected with a base through a quick-change locking mechanism, a push rod pushes a push rod in the positioning pin to move upwards, so that a clamping tongue is changed into a horizontal direction from a vertical direction, one end of the clamping tongue extends out of an opening of a storage groove to clamp a door lining plate, the door lining plate can be assembled, after the assembly is completed, a return spring drives the push rod to reset, the door lining plate can be taken down, a locking ring is manually pressed down, and the positioning pin is pulled out and inserted into other bases to assemble door lining plates of different types, so that the replacement efficiency is improved.

The purpose of the utility model is realized in the following way:

the utility model provides a quick change locating pin self-clamping device, includes base, locating pin, drive arrangement, the base center is equipped with an axial through-hole, a push rod clearance fit is in the axial through-hole, push rod lower extreme and the piston fixed connection who sets up drive arrangement at the base lower extreme, the locating pin is connected through quick change locking mechanism to the upper end of base, the locating pin is the big step shaft of upper and lower extreme small middle section, and wherein the lower extreme is the connecting portion that are used for inserting quick change locking mechanism, and the upper end is the center reference column for being used for inserting the work piece hole, and the middle section is the supporting part, the center reference column is equipped with the side open-ended and accomodates the groove, accomodate the step shaft hole intercommunication that groove and locating pin set up, accomodate the groove and pass through a round pin axle articulated joint block tongue, the step shaft hole middle gap cooperation ejector pin of locating pin, the lower extreme and the push rod upper end contact of block tongue are equipped with first direction arc, this first direction arc contacts with the ejector pin, drive arrangement is through the push rod and is used for inserting the connecting portion of quick change locking mechanism, and the other end that stretches out the groove to accomodate, forms the location locking to the work piece.

The push rod is a three-stage stepped shaft with a small upper end and a large lower end, a third cavity is formed by the middle diameter section and the inner wall of the base, a second return spring is arranged in the third cavity, the stepped shaft hole is four-stage stepped, the aperture is sequentially increased from top to bottom, the push rod is a three-stage stepped shaft, a first cavity is formed by a first shaft shoulder of the push rod and a first hole shoulder of the supporting part, a second cavity is formed by a second shaft shoulder of the push rod and a second hole shoulder, a first return spring is arranged in the second cavity, the driving device is disconnected, the push rod is pushed by the second return spring to reset the piston, the push rod is reset by the first return spring to enable the push rod to move downwards, and the overhanging end of the clamping tongue is retracted to unlock a workpiece.

The ejector rod is provided with a large-diameter section, a sliding bearing is in clearance fit with the outer wall of the large-diameter section, and a clamp spring is arranged at the bottom of the sliding bearing.

The upper end of the clamping tongue is provided with a second guiding arc section, the second guiding arc section is contacted with a guiding inclined plane at the top of the storage groove, the direction of the second guiding arc section is consistent with that of the guiding inclined plane at the top of the storage groove, and the clamping tongue can rotate in the horizontal direction and the vertical direction.

The pin shaft is deviated from the axis line of the locating pin and is positioned at the side close to the opening of the containing groove.

The pin shaft is hinged with the storage groove through a pin hole, and the shape of the pin hole is an oblique strip-shaped hole.

The quick-change locking mechanism comprises a connecting part, limiting steel balls, a locking ring, a compression spring and a clamping ring, wherein the clamping ring is fixedly arranged on the outer wall of a base, the connecting part is inserted into an axial through hole and connected with the base through the locking ring, an annular groove is formed in the outer wall of the connecting part and corresponds to the position of a hole in the outer wall of the base, the annular groove is used for placing the limiting steel balls, an inwards-sunken yielding groove is formed in the inner wall of the locking ring and corresponds to the position of the hole and is located above the annular groove, and the compression spring is supported between the locking ring and the base and pushes the locking ring to lean against the bottom of the clamping ring.

The top of locking ring is equipped with the anti-rotating pin, the anti-rotating pin inserts in the circumference spacing groove that the supporting part outer wall set up.

The top of the storage groove is fixedly provided with a magnet, and the clamping tongue is attracted to the magnet after returning.

The lower end of the push rod is fixedly connected with a piston of a driving device through a double-headed screw, and the driving device is an air cylinder.

By adopting the scheme, the quick-change type positioning pin self-clamping device comprises a base, a positioning pin and a driving device, wherein an axial through hole is formed in the center of the base, a push rod is in clearance fit in the axial through hole, the lower end of the push rod is fixedly connected with a piston of the driving device arranged at the lower end of the base, the upper end of the base is connected with the positioning pin through a quick-change locking mechanism, the positioning pin is a stepped shaft with small upper end and large lower end middle section, the lower end is a connecting part for inserting the quick-change locking mechanism, the upper end is a central positioning column for inserting a workpiece hole, the middle section is a supporting part, after the central positioning column is inserted into the workpiece hole, the supporting part is used for supporting the weight of work piece, the center reference column is equipped with the side open-ended and accomodates the groove, accomodate the ladder shaft hole intercommunication that groove and locating pin set up, accomodate the groove and articulate a joint through the round pin axle, a ejector pin is joined in marriage to the clearance in the ladder shaft hole of locating pin, the upper end of ejector pin can stretch out in the ladder shaft hole, the lower extreme and the push rod upper end contact of ejector pin, the lower extreme of joint is equipped with first direction arc, this first direction arc and push rod contact, drive arrangement drives the other end of joint and stretches out the opening of accomodating the groove through the push rod upward movement, can press from both sides tight work piece, forms the location locking.

The quick-change type positioning pin self-clamping device improves the replacement efficiency, reduces the labor intensity and reduces the cost.

The utility model is further described below with reference to the drawings and detailed description.

Drawings

FIG. 1 is an assembly schematic diagram of the utility model with a tooling substrate and an A workpiece.

FIG. 2 is an assembly schematic diagram of the utility model with a tooling substrate and a B workpiece.

Fig. 3 is a schematic structural view of the positioning pin when the latch of the present utility model is reset.

Fig. 4 is an enlarged schematic view at a in fig. 3.

Fig. 5 is a schematic view of the structure of the positioning pin when the latch is horizontal.

Fig. 6 is a schematic diagram of direction B of fig. 5.

Fig. 7 is a schematic view showing a state in which the locking ring is reset according to the present utility model.

Fig. 8 is a schematic view showing a state in which the locking ring of the present utility model is pressed down.

Fig. 9 is an enlarged schematic view at C in fig. 7.

Fig. 10 is a schematic diagram of the three-dimensional assembly of the utility model with a tooling substrate and a workpiece.

Reference numerals illustrate: the tool comprises a workpiece A, a positioning pin 2, a base 3, a workpiece B4, a circumferential limit groove 5, a first return spring 6, a magnet 7, a clamping tongue 8, a push rod 9, a clamp spring 10, a tool base plate 11, a sliding bearing 12, a driving device 13, a pin shaft 14, an anti-rotation pin 15, a locking ring 16, a central positioning column 17, a storage groove 18, a first hole shoulder 19, a first shaft shoulder 20, a second shaft shoulder 21, a second hole shoulder 22, a second return spring 23, a pin hole 24, a guide inclined plane 25, a supporting part 26, a limit steel ball 27, a push rod 28, a clamp ring 29, a compression spring 30, a first chamber 31, a second chamber 32, a connecting part 33, an annular groove 34, a third chamber 35, a relief groove 36, a piston 37, a hole 38, a first guide arc 39, a second guide arc 40, a large diameter section 41, a fixed connecting block A42 and a fixed connecting block B43.

Detailed Description

Referring to fig. 1 to 10, a quick-change positioning pin self-clamping device comprises a base 3, a positioning pin 2 and a driving device 13, wherein an axial through hole is formed in the center of the base 3, a push rod 28 is in clearance fit in the axial through hole, the lower end of the push rod 28 is fixedly connected with a piston 37 of the driving device 13 arranged at the lower end of the base 3 through a double-headed screw, the push rod 28 is a three-stage stepped shaft with a small upper end and a large lower end, a third cavity 35 is formed between a middle diameter section and the inner wall of the base 3, and a second return spring 23 is arranged in the third cavity 35. The driving device 13 is a cylinder. The upper end of the base 3 is connected with the locating pin 2 through the quick-change locking mechanism, the locating pin 2 is a stepped shaft with small upper end and large lower end and large middle section, the lower end is a connecting part 33 used for being inserted into the quick-change locking mechanism, the upper end is a central locating column 17 used for being inserted into a workpiece hole, the middle section is a supporting part 26, and the supporting part 26 is used for supporting the weight of a workpiece after the central locating column 17 is inserted into the workpiece hole. In this embodiment, the base 3 is mounted on the tooling substrate 11 through an a fixed connection block 42 and a B fixed connection block 43, and the base 3 is located in an arc groove between the two fixed connection blocks, wherein the a fixed connection block 42 is connected with the tooling substrate 11 through a screw, and the B fixed connection block 42 is connected with the a fixed connection block 42 through a screw. The center positioning column 17 is provided with a storage groove 18 with an open side, the storage groove 18 is communicated with a stepped shaft hole formed in the positioning pin 2, the storage groove 18 is hinged with a clamping tongue 8 through a pin shaft 14, the pin shaft 14 is hinged with the storage groove 18 through a pin hole 24, the pin hole 24 is in an oblique strip-shaped hole, the pin shaft 14 deviates from the axis line of the positioning pin 2 and is positioned at the open side close to the storage groove 18, a push rod 9 is matched in the stepped shaft hole of the positioning pin 2 in a clearance mode, and the upper end of the push rod 9 can extend out of the stepped shaft hole to enter the storage groove 18. The lower end of the push rod 9 is contacted with the upper end of the push rod 28. The ejector rod 9 is provided with a large-diameter section 41, a sliding bearing 12 is in clearance fit with the outer wall of the large-diameter section 41, and a clamp spring 10 is arranged at the bottom of the sliding bearing 12. The shape of ladder shaft hole is the level four echelonment, and the aperture increases from top to bottom in proper order, ejector pin 9 is tertiary ladder shaft, and this ladder shape is used for spacing, the first shaft shoulder 20 of ejector pin 9 and the first hole shoulder 19 of supporting part 26 form first cavity 31, the diameter of first shaft shoulder 20 is less than the diameter of first cavity 31, the second shaft shoulder 21 of ejector pin 9 and second hole shoulder 22 form second cavity 32, the diameter of second shaft shoulder 21 is less than the diameter of second cavity 32. The second chamber 32 is provided with a first return spring 6, after the central positioning column 17 is inserted into the workpiece hole, the driving device 13 pushes the ejector rod 9 to move upwards through the push rod 28, the first return spring 6 and the second return spring 23 are in a compressed state, the lower end of the clamping tongue 8 is provided with a first guiding arc section 39, the first guiding arc section 39 is contacted with the ejector rod 9, the upper end of the clamping tongue 8 is provided with a second guiding arc section 40, the second guiding arc section 40 is contacted with the guiding inclined plane 25 at the top of the accommodating groove 18 and has the same direction, when the ejector rod 9 moves upwards, the second guiding arc section 40 of the clamping tongue 8 moves along the guiding inclined plane 25 to drive the other end of the clamping tongue 8 to extend out of the opening of the accommodating groove 18, and when the first shaft shoulder 20 is contacted with the first hole shoulder 19, the ejector rod 9 moves to the highest position, the clamping tongue 8 is in a horizontal direction, and the workpiece is clamped, so that positioning locking is formed on the workpiece. The driving device 13 is disconnected, the second return spring 23 pushes the push rod 28 to reset the piston 37, the first return spring 6 resets to enable the ejector rod 9 to move downwards, the overhanging end of the clamping tongue 8 is retracted to unlock the workpiece, and the workpiece can be removed at the moment. The top of the containing groove 18 is fixedly provided with a magnet 7, and the clamping tongue 8 is attracted to the magnet 7 after returning. The latch 8 is rotatable in a horizontal direction and a vertical direction.

The quick-change locking mechanism comprises a connecting part 33, a limiting steel ball 27, a locking ring 16, a compression spring 30 and a clamping ring 29, wherein the clamping ring 29 is fixedly arranged on the outer wall of the base 3, the connecting part 33 is inserted into an axial through hole and connected with the base 3 through the locking ring 16, an anti-rotation pin 15 is arranged at the top of the locking ring 16, the anti-rotation pin 15 is inserted into a circumferential limiting groove 5 arranged on the outer wall of the supporting part 26, the positioning pin 2 is prevented from rotating circumferentially, and in the embodiment, the number of the anti-rotation pins 15 is 2. The outer wall of the connecting portion 33 is provided with an annular groove 34, the annular groove 34 corresponds to the position of a hole 38 in the outer wall of the base 3 and is used for placing the limiting steel ball 27, the inner wall of the locking ring 16 is provided with an inward concave yielding groove 36, the yielding groove 36 corresponds to the position of the hole 38 and is located above the annular groove 34, the compression spring 30 is supported between the locking ring 16 and the base 3 and pushes the locking ring 16 to lean against the bottom of the clamping ring 29. When the assembly of the workpiece A1 is completed, the air cylinder is closed, the clamping tongue 8 is reset, the workpiece A1 is removed, the workpiece B4 is replaced to be continuously assembled, the locking ring 16 is pushed downwards after the assembly is completed, the locating pin 2 is lifted upwards, the limiting steel balls 27 move into the yielding groove 36 from the space formed by the annular groove 34 and the hole 38, and the locating pin 2 can be easily pulled out; the locking ring 16 is pushed down again, and the positioning pin 2 is inserted into the locking ring 16, thus completing the assembly. In this embodiment, the supporting portion 26 of the positioning pin 2 can be processed into different heights, so as to be convenient for adapting to workpieces with different heights; the center positioning column 17 can be processed into workpiece holes with different diameters, so that the workpiece holes with different diameters can be adapted conveniently; the center positioning column 17 and the clamping tongue 8 can be processed into workpieces with different heights, so that the workpieces with different thicknesses can be conveniently adapted.

Claims (10)

1. The utility model provides a quick change locating pin self-clamping device, includes base (3), locating pin (2), drive arrangement (13), its characterized in that: the center of the base (3) is provided with an axial through hole, a push rod (28) is in clearance fit in the axial through hole, the lower end of the push rod (28) is fixedly connected with a piston (37) of a driving device (13) arranged at the lower end of the base (3), the upper end of the base (3) is connected with a positioning pin (2) through a quick-change locking mechanism, the positioning pin (2) is a stepped shaft with a small upper end and a large lower end, the lower end is a connecting part (33) for inserting the quick-change locking mechanism, the upper end is a central positioning column (17) for inserting a workpiece hole, the middle section is a supporting part (26), the central positioning column (17) is provided with a storage groove (18) with a side opening, the storage groove (18) is communicated with a stepped shaft hole arranged at the positioning pin (2), the storage groove (18) is hinged with a clamping tongue (8) through a pin shaft (14), the middle part of the stepped shaft hole of the positioning pin (2) is in clearance fit with a push rod (9), the lower end of the push rod (9) is in contact with the upper end of the push rod (28), the lower end of the clamping tongue (8) is provided with a guide section (39) which is provided with a guide section (39) with a guide section (13) with an arc-shaped groove (13) which is arranged at the lower end, the arc-shaped groove (9) extends out of the arc-shaped groove (13) and is provided with a guide groove (9), forming a positioning lock for the workpiece.

2. The quick-change dowel self-clamping device of claim 1, wherein: the push rod (28) is a three-stage stepped shaft with a small upper end and a large lower end, wherein a third chamber (35) is formed by a middle diameter section and the inner wall of the base (3), a second return spring (23) is arranged in the third chamber (35), the shape of the stepped shaft hole is in a four-stage stepped shape, the aperture is sequentially increased from top to bottom, the push rod (9) is a three-stage stepped shaft, a first chamber (31) is formed by a first shaft shoulder (20) of the push rod (9) and a first hole shoulder (19) of the supporting part (26), a second chamber (32) is formed by a second shaft shoulder (21) of the push rod (9) and a second hole shoulder (22), a first return spring (6) is arranged in the second chamber (32), a driving device (13) is disconnected, the second return spring (23) pushes the push rod (28) to reset a piston (37), the first return spring (6) is reset to enable the push rod (9) to move downwards, and the overhanging end of the clamping tongue (8) is retracted to unlock a workpiece.

3. The quick-change dowel self-clamping device according to claim 1 or 2, characterized in that: the ejector rod (9) is provided with a large-diameter section (41), a sliding bearing (12) is in clearance fit with the outer wall of the large-diameter section (41), and a clamp spring (10) is arranged at the bottom of the sliding bearing (12).

4. The quick-change dowel self-clamping device of claim 1, wherein: the upper end of the clamping tongue (8) is provided with a second guiding arc section (40), the second guiding arc section (40) is contacted with a guiding inclined plane (25) at the top of the containing groove (18) and has the same direction, and the clamping tongue (8) can rotate in the horizontal direction and the vertical direction.

5. The quick-change dowel self-clamping device of claim 1, wherein: the pin shaft (14) is deviated from the axis line of the positioning pin (2) and is positioned at the opening side close to the accommodating groove (18).

6. The quick-change dowel self-clamping device of claim 1, wherein: the pin shaft (14) is hinged with the storage groove (18) through a pin hole (24), and the pin hole (24) is in an inclined strip-shaped hole.

7. The quick-change dowel self-clamping device of claim 1, wherein: the quick-change locking mechanism comprises a connecting portion (33), limiting steel balls (27), a locking ring (16), a compression spring (30) and a clamping ring (29), wherein the clamping ring (29) is fixedly arranged on the outer wall of a base (3), the connecting portion (33) is inserted into an axial through hole and connected with the base (3) through the locking ring (16), an annular groove (34) is formed in the outer wall of the connecting portion (33), the annular groove (34) corresponds to the position of a hole (38) in the outer wall of the base (3) and is used for accommodating the limiting steel balls (27), an inwards-sunken yielding groove (36) is formed in the inner wall of the locking ring (16), the yielding groove (36) corresponds to the position of the hole (38) and is located above the annular groove (34), and the compression spring (30) is supported between the locking ring (16) and the base (3) and pushes the locking ring (16) to be abutted to the bottom of the clamping ring (29).

8. The quick change dowel self-clamping device of claim 7, wherein: the top of locking ring (16) is equipped with anti-rotating pin (15), anti-rotating pin (15) inserts in circumference spacing groove (5) that supporting part (26) outer wall set up.

9. The quick-change dowel self-clamping device of claim 1, wherein: the top of the containing groove (18) is fixedly provided with a magnet (7), and the clamping tongue (8) is attracted to the magnet (7) after returning.

10. The quick-change dowel self-clamping device of claim 1, wherein: the lower end of the push rod (28) is fixedly connected with a piston (37) of the driving device (13) through a double-headed screw, and the driving device (13) is an air cylinder.