CN214643290U

CN214643290U - Pin puller

Info

Publication number: CN214643290U
Application number: CN202120328907.6U
Authority: CN
Inventors: 杨天文; 唐志勇; 陈阳; 季明其
Original assignee: Jouder Precision Industry Kunshan Co ltd
Current assignee: Jouder Precision Industry Kunshan Co ltd
Priority date: 2021-02-05
Filing date: 2021-02-05
Publication date: 2021-11-09
Anticipated expiration: 2031-02-05

Abstract

The utility model relates to a pin puller belongs to mould processing technology field. The pin puller comprises a double-threaded screw, an upper plate, a lower plate, a telescopic mechanism and a lifting block for pulling a pin, wherein one end of the double-threaded screw is in threaded connection with the lifting block, and the other end of the double-threaded screw is in threaded connection with the upper plate; the telescopic mechanism comprises a screw rod, two upper support rods respectively hinged with the upper plate and two lower support rods respectively hinged with the lower plate; the two upper supporting rods and the two lower supporting rods are arranged into a quadrilateral structure, and the double-headed screw is positioned on a diagonal line of the quadrilateral structure; the upper support rod and the lower support rod which are positioned on the same side of the double-head screw rod are rotationally connected through a connecting shaft; the screw rod and two even axle spiro union can make two even axles be close to each other or keep away from through rotating the screw rod to make double-end screw drive the promotion piece and promote or transfer, realize pulling out the round pin operation. The utility model discloses a pin puller solves the artifical degree of dependence of pulling pin among the prior art high, waste time and energy and the technical problem that work efficiency is low.

Description

Pin puller

Technical Field

The utility model relates to a pin puller belongs to mould processing technology field.

Background

In the disassembling and maintenance of machinery and dies, a pin which is fixedly installed is usually required to be pulled out, and at present, an impact pin puller is generally adopted in a pin pulling tool, namely, a screw is screwed into a threaded hole of the pin, and the pin is pulled out by utilizing the impact force of an impact hammer sleeved on a pin puller rod. The pin pulling mode completely depends on manual operation, the required force is large, the pins with large diameters, tightness or length can be pulled out only by impacting for many times for a long time, the working efficiency is low, and the manual strength is high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome not enough among the prior art, provide a pin puller, solve the artifical degree of dependence of pin pulling among the prior art high, waste time and energy and the technical problem that work efficiency is low.

In order to achieve the purpose, the utility model provides a pin puller, which comprises a double-end screw, an upper plate, a lower plate, a telescopic mechanism and a lifting block for pulling pins, wherein one end of the double-end screw is in threaded connection with the lifting block, and the other end of the double-end screw is in threaded connection with the upper plate;

the telescopic mechanism comprises a screw rod, two upper support rods respectively hinged with the upper plate and two lower support rods respectively hinged with the lower plate; the two upper supporting rods and the two lower supporting rods are arranged into a quadrilateral structure, and the double-headed screw is positioned on a diagonal line of the quadrilateral structure; the upper support rod and the lower support rod which are positioned on the same side of the double-head screw rod are rotationally connected through a connecting shaft; the screw rod and two even axle spiro union can make two even axles be close to each other or keep away from through rotating the screw rod to make double-end screw drive the promotion piece and promote or transfer, realize pulling out the round pin operation.

Furthermore, the lifting device also comprises a pulling screw, and one end of the lifting block, which is far away from the double-headed screw, is provided with a U-shaped through groove with a downward opening; a lug is arranged at the notch of the U-shaped through groove and used for clamping the pulling screw; when the pin is pulled out, the pulling screw penetrates through the lower plate and is in threaded connection with the fixing pin to be pulled out.

Furthermore, a lifting groove is further formed in the lifting block, and the screw rod penetrates through the lifting groove and is in threaded connection with connecting shafts on two sides of the lifting block.

Furthermore, the hypoplastron is equipped with the constant head tank to fix a position fixed pin position, the fixed pin leans on hypoplastron one end spiro union to have pulled out the screw, the nut that pulls out the screw passes the constant head tank and is located the logical groove of U-shaped.

Furthermore, the device also comprises a plurality of cushion blocks matched with the pulling screw, and the cushion blocks are connected through a sleeve rope.

Furthermore, a switching nut is arranged at the joint of the double-end screw and the lifting block.

Further, the double-end screw rod is provided with a plurality of fastening nuts beyond the upper plate part.

Furthermore, a bulge is arranged on one side of the upper plate and is rotatably connected with the handle.

Furthermore, screw rod one end is equipped with the interior hexagon of adapter adaptation with the wind gun rifle and connects the hole.

Compared with the prior art, the utility model discloses the beneficial effect who reaches is:

the connecting shaft is in rotary threaded connection with the screw rod, the rotary motion of the screw rod is converted into linear motion of the connecting shaft, motion conversion is achieved, meanwhile the purpose of saving labor for the first time is achieved by the aid of the labor-saving wedge principle of the screw rod, the upper supporting rod, the connecting shaft and the lower supporting rod form a rhombic structure, secondary labor is saved according to the stress principle of the triangular structure, labor intensity is reduced, and actual working efficiency is effectively improved.

The lifting block is provided with a U-shaped through groove near one end of the lower plate, a protruding block is arranged at the notch of the U-shaped through groove, and the protruding block is completely attached to the cushion block during pin pulling, so that the effect of the pin pulling is enhanced.

The plurality of cushion blocks are arranged, one cushion block is correspondingly provided with the pulling screws, and the plurality of cushion blocks improve the continuity of the pulling pin in the actual operation process through the sleeve ropes.

Screw rod one end is equipped with the interior hexagon of adapter adaptation with the wind big gun and connects the hole, through regard as the screw rod power supply with the wind big gun rifle, makes the pulling pin not rely on manual operation completely, has indirectly reduced manipulation strength.

Drawings

Fig. 1 is a schematic structural diagram of a pin remover according to an embodiment of the present invention;

fig. 2 is an exploded view of a pin puller according to an embodiment of the present invention;

FIG. 3 is a force diagram of the screw of FIG. 1;

fig. 4 is a force diagram of a diamond structure formed by the upper support rod, the connecting shaft and the lower support rod in fig. 1.

In the figure: 1. tightening the nut; 2. an upper plate; 3. an upper support rod; 4. a double-ended screw; 5. a connecting shaft; 6. a wind gun; 7. a threaded pin shaft; 8. cushion blocks; 9. a lower support bar; 10. pulling out the screw; 11. a fixing pin; 12. a lower plate; 13. a pin shaft; 14. sleeving a rope; 15. a lifting block; 16. a screw; 17. a switching nut; 18. a handle; 19. a cotter pin; 20. and (7) a gasket.

Detailed Description

The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

As shown in fig. 1, the pin puller comprises a double-thread screw 4, an upper plate 2, a lower plate 12, a telescopic mechanism and a lifting block 15 for pulling pins;

one end of the double-threaded screw rod 4 is in threaded connection with a threaded hole in the top of the lifting block 15, and a switching nut 17 is arranged at the joint for fastening, so that the double-threaded screw rod 4 is prevented from rotating in the threaded hole in the end face of the lifting block 15. The other end is in threaded connection with threaded holes distributed on the upper plate 2, and a part of the threaded connection exceeding the upper plate 2 is sleeved with a plurality of fastening nuts 1, so that the mechanical strength of connection between the upper plate 2 and the double-headed screw rod 4 is enhanced.

The telescopic mechanism comprises a screw 16, two upper supporting rods 3 respectively hinged with the upper plate 2 and two lower supporting rods 9 respectively hinged with the lower plate 12;

through holes are formed in the two sides of the upper plate 2, and are matched with the corresponding pin shafts 13, gaskets 20 and split pins 19 to be rotatably connected with the upper supporting rods 3; correspondingly, through holes are also formed in the two sides of the lower plate 12, the corresponding pin shaft 13, the corresponding gasket 20 and the corresponding cotter pin 19 are matched and rotatably connected with the lower support rod 9, and in an initial working state, one end, far away from the double-end screw rod 4, of the lifting block 15 is attached to the lower plate 12. Two go up bracing piece 3 and two lower support bars 9 and set up about 4 symmetries of double threaded screw, form the rhombus structure, it still is equipped with even axle 5 with the articulated department of lower support bar 9 to go up bracing piece 3, it is concrete, the external diameter middle part perpendicular to axis direction of even axle 5 is equipped with a screw thread through-hole for spiro union screw 16, the middle part of even 5 both ends faces of axle respectively is equipped with a step hole, the outer end in this step hole is straight hole, inside is the screw hole, the bracing piece 3 links firmly with lower support bar 9 to cooperate corresponding thread pin axle 7. In actual work, the double-end screw 4 is lifted or lowered by converting the rotary motion of the screw 16 into the linear motion of the connecting shaft 5, so that the lifting block 15 is driven to perform stretching and retracting actions.

In one embodiment, as shown in fig. 3, the screw 16 has threads with M12 × P1.75 regular coarse threads, and the helix angle of the screw 16 is 4.17 degrees, so that 13.7 kgf is generated in the axial direction of the screw 16 for every 1 kgf used in the radial direction of the screw 16.

In an embodiment, the effective lengths of the upper support rod 3, the lower support rod 9 and the screw 16 in the initial state are equal, specifically, as shown in fig. 4, it is known that the effective lengths of the upper support rod 3, the lower support rod 9 and the screw 16 in the initial state are equal, and the upper support rod 3, the lower support rod 9 and the connecting shaft 5 form a diamond structure, and it can be known from an equilateral triangle that three inner angle included angles of a triangle formed by 2 upper support rods 3 and the screw 16 are all 60 degrees, that is, in the initial state, the included angle α =60 ° between the upper support rod 3 and the screw 16. Analysis shows that the range of the included angle alpha between the upper supporting rod 3 and the screw 16 is more than or equal to 60 degrees and less than 90 degrees. According to the stress analysis, the included angle α =60 ° between the support rod 3 and the screw 16 in the initial state, and when the included angle α between the support rod 3 and the screw 16 in the horizontal position is increased to 70 °, 2.74 kg of the pulling force is generated on the lifting block 15 in the vertical direction for every 1 kg of force used by the screw 16 in the vertical position. The drawing force gradually increases as the angle between the upper support rod 3 and the screw 16 gradually increases. In summary, the pulling force of the lifting block 15 on the pin is more than 1.73 times of the acting force of the screw 16. This design utilizes the laborsaving principle of screw rod 16's wedge to reach laborsaving purpose for the first time, goes up bracing piece 3, even axle 5 and lower support bar 9 and constitutes the rhombus structure, reaches the secondary laborsavingly according to the atress principle of triangle-shaped structure again, has not only reduced artifical intensity and has still effectively improved actual work efficiency.

In one embodiment, the coupling shaft 5 at the end of the screw 16 is cylindrical, and the coupling shaft 5 at the front end of the screw 16 has a flat surface on its outer diameter to facilitate effective engagement with the cylindrical end surface at the front end of the screw 16.

Promote piece 15 and keep away from 4 one end of double-end screw is equipped with the U-shaped and leads to the groove, and this U-shaped leads to the groove bottom and is equipped with U type lug, and the lug has guaranteed to have for the U type that even fixed pin 11 one side on the machine has vertical lateral wall also can not influence pulling out of fixed pin 11, can realize pulling out the operation through U type opening and lateral wall laminating. The middle upper part of the lifting block 15 is also provided with an oblong lifting groove, the two ends of the lifting groove are communicated, and a screw 16 passes through the lifting groove and is in threaded connection with the connecting shafts 5 at the two ends.

In one embodiment, a plurality of spacers 20 are disposed between the screw 16 and the coupling shaft 5 at the front end of the screw 16.

The up end of hypoplastron 12 is equipped with a constant head tank, and this constant head tank communicates with each other from top to bottom, is convenient for fix a position fixed pin 11's position, and under initial operating condition, the screw 10 that plays pulls out and the screw hole spiro union on fixed pin 11, and the nut that plays to pull out screw 10 passes the constant head tank and is located the U-shaped logical groove of promotion piece 15. The locating slot is oblong in this embodiment, but is not limited to this, and other fluting structures such as circular, square also can be chooseed for use, when satisfying the pull-up, fixed pin 11 just can pass the locating slot can.

The pin puller provided by the embodiment of the invention further comprises a plurality of cushion blocks 8, one cushion block 8 is correspondingly provided with a plurality of pulling screws 10, and the cushion blocks 8 are connected through the sleeve ropes 14, so that the continuity of pin pulling is improved in the actual operation.

In one embodiment, the pulling-out screws 10 can correspond to a plurality of corresponding cushion blocks 8, which is beneficial to improving the pulling-out strength of the pulling pin.

The utility model provides an embodiment, upper plate 2 one side is equipped with the arch, and protruding both ends are equipped with the through-hole, and the cooperation is connected handle 18 and protruding rotation with round pin axle 13, gasket 20 and split pin 19 of this through-hole looks adaptation, and under the operating condition, handle 18 and double-end screw 4 perpendicular setting, under the end condition, handle 18 is parallel with double-end screw 4, is favorable to saving space area.

One end of the screw rod 16 is provided with an inner hexagonal connection hole matched with the adapter of the air cannon gun 6, the air cannon gun 6 can rotate forward and backward, and the air cannon gun 6 is connected with the inner hexagonal interface during working. The air gun 6 is used as a power source of the screw 16, so that the pin pulling does not depend on manual operation completely, and the operation intensity is reduced indirectly.

The embodiment of the utility model provides a concrete operation flow of pin pulling device as follows:

the screw 16 is rotated to make the two connecting shafts 5 approach each other, thereby driving the upper plate 2 to move in a direction away from the lower plate 12, and the double-head screw 4 drives the lifting block 15 to perform lifting operation under the driving of the upper plate 2 until the fixing pin 11 in transmission connection with the lifting block 15 is pulled up.

In the initial state, the lower end of the lifting block 15 is attached to the upper end surface of the lower plate 12, a pulling screw 10 with proper length is screwed into a threaded hole on a fixed pin 11 to be pulled out, a positioning groove of the lower plate 12 of the pin puller is attached to a plane where a machine needs to pull out a pin, a screw cap of the pulling screw 10 penetrates through the positioning groove and is positioned in a U-shaped through groove of the lifting block 15, a cushion block 8 matched with the pulling screw 10 is inserted into the lower end of a screw cap of the pulling screw 10, a left hand supports a towing handle 18, a right hand holds a wind cannon gun 6, the wind cannon gun 6 is connected with an inner hexagonal connecting hole on a screw rod 16, the wind cannon gun 6 is adjusted to rotate forwards, the wind cannon gun 6 drives the screw rod 16 to rotate forwards by pressing a switch of the wind cannon gun 6, the distance between connecting shafts 5 positioned on the left side and the right side of the lifting block 15 is pulled close, the distance between an upper supporting rod 3 and a lower supporting rod 9 is shortened, and the distance in the left and right directions is lengthened, because the lower end face of the lower plate 12 is attached to the surface of the machine and is kept still, a string formed by connecting the double-headed screw, the lifting block 15, the fork-shaped cushion block 8, the pulling screw 10 and the fixing pin 11 in the vertical height direction moves upwards along with the upper plate 2 until the fixing pin 11 is pulled out. The pulled-out fixing pin 11 can be laterally taken out from the opening of the U-shaped convex block, specifically, the fixing pin 11 screwed with the pulling screw and the cushion block 8 are laterally taken out from the opening of the U-shaped convex block, then the cushion block 8 is pulled out by hand, and finally the pulling screw 10 is unloaded, so that the separation of the pulling screw 10 and the fixing pin 11 is realized.

When the wind gun returns to the initial state, the handle 18 is pressed downwards, the wind gun 6 is adjusted to be reversed, the switch of the wind gun 6 is pressed, the wind gun 6 drives the screw rod 16 to be reversed, the distance between the connecting shafts 5 positioned on the left side and the right side of the lifting block 15 is lengthened, the distance between the upper supporting rod 3 and the lower supporting rod 9 which form a rhombus in the front-back direction is lengthened, the distance in the up-down height direction is shortened, and the lifting block 15 descends along with the upper plate 2 and returns to be attached to the lower plate 12.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.

Claims

1. The pin puller is characterized by comprising a double-threaded screw (4), an upper plate (2), a lower plate (12), a telescopic mechanism and a lifting block (15) for pulling a pin, wherein one end of the double-threaded screw is in threaded connection with the lifting block, and the other end of the double-threaded screw is in threaded connection with the upper plate;

the telescopic mechanism comprises a screw rod (16), two upper supporting rods (3) respectively hinged with the upper plate and two lower supporting rods (9) respectively hinged with the lower plate; the two upper supporting rods and the two lower supporting rods are arranged into a quadrilateral structure, and the double-headed screw is positioned on a diagonal line of the quadrilateral structure; the upper support rod and the lower support rod which are positioned on the same side of the double-head screw rod are rotationally connected through a connecting shaft (5); the screw rod and two even axle spiro union can make two even axles be close to each other or keep away from through rotating the screw rod to make double-end screw drive the promotion piece and promote or transfer, realize pulling out the round pin operation.

2. The pin puller according to claim 1, further comprising a pulling screw (10), wherein a U-shaped through groove with a downward opening is formed at one end of the lifting block, which is far away from the double-headed screw rod; a lug is arranged at the notch of the U-shaped through groove and used for clamping the pulling screw; when the pin is pulled out, the pulling screw penetrates through the lower plate and is in threaded connection with the fixing pin (11) to be pulled out.

3. The pin puller according to claim 1, wherein the lifting block is further provided with a lifting groove, and the screw penetrates through the lifting groove and is in threaded connection with the connecting shafts on two sides of the lifting block.

4. The pin puller according to claim 2, wherein the lower plate is provided with a positioning groove for positioning a fixing pin, a pulling screw is screwed on one end of the fixing pin close to the lower plate, and a nut of the pulling screw passes through the positioning groove and is positioned in the U-shaped through groove.

5. The pin puller according to claim 1, further comprising a spacer (8) associated with the puller screw, said spacer being provided in plurality and connected by a noose (14).

6. The pin puller according to claim 1, wherein a coupling nut (17) is provided at the junction of the double-ended screw and the lifting block.

7. Pin puller according to claim 1, characterised in that the double-ended screw is provided with a plurality of fastening nuts (1) beyond the upper plate part.

8. The pin puller according to claim 1, wherein the upper plate is provided with a protrusion on one side, the protrusion being rotatably connected to the handle (18).

9. The pin puller according to claim 1, wherein one end of the screw is provided with an internal hexagonal socket adapted to the adapter of the gun (6).