CN219359360U

CN219359360U - Blind pin puller

Info

Publication number: CN219359360U
Application number: CN202320079648.7U
Authority: CN
Inventors: 李龙生; 范旭东; 张冬生; 步宪禄; 刘旭
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2023-01-10
Filing date: 2023-01-10
Publication date: 2023-07-18
Anticipated expiration: 2033-01-10

Abstract

The utility model discloses a blind pin puller, which relates to the technical field of mechanical installation equipment and comprises the following specific schemes: the utility model provides a blind pin puller, includes the guide bar, and the slider has been cup jointed in the guide bar middle section, and the guide bar top is equipped with the step in order to support the slider, and guide bar bottom fixed connection pulls out the first end of round pin chuck, pulls out the through-hole that the round pin chuck second end was opened to have and is used for pressing from both sides tight blind pin, evenly opens at through-hole department along pulling out round pin chuck axis direction has a plurality of openings, pulls out round pin chuck second end week side and mounting threaded connection, and the through-hole internal diameter is less than blind pin external diameter. The technical problems that the existing pin puller has certain requirements on the wall thickness of a front pull rod and a chuck at a pin hole, the universality is poor, the interference between the chuck and a blind pin is possibly insufficient, the positioning pin cannot be pulled out, and the operation is inconvenient are solved.

Description

Blind pin puller

Technical Field

The utility model relates to the technical field of mechanical installation equipment, in particular to a blind pin puller.

Background

Many of the many mechanical devices, engines, etc. are currently positioned using blind pins. When some parts are assembled, interference driving cylindrical pins are required to be punched on the parts in advance, and when faults occur or the blind pins are required to be disassembled for inspection. Generally, the hammer is adopted for violent disassembly and beating, or the blind hole is drilled and then taken out, the operation steps are complex, the damage to parts is easy to cause, and the efficiency is low.

The application number CN 109397186A-blind pin puller has the working principle that: when the blind pin is used, the clamping head is inserted into the blind pin, and the blind pin is tightly clamped by the pin pulling hole due to the fact that the clamping head is pulled upwards due to the existence of the conical surface and the notch by means of a spanner tool extending into the through hole of the rear pull rod and rotating the center screw. At this time, the blind pin is pulled out by pushing the slide hammer upward and hammering the pin puller. The technical problems of the scheme are as follows:

1. the blind pin is clamped by the contraction of the chuck, and certain requirements are inevitably set on the wall thickness of the front pull rod at the pin hole and the chuck, and the usability is affected by the fact that the front pull rod is too thin or too thick, so that the pin puller with different specifications is required to be designed and processed for cylindrical pins with each specification, and the universality is poor;

2. the structure has certain requirements on the exposure height of the blind pin, and when the exposure height is too small, the condition of insufficient interference between the chuck and the blind pin can occur, so that the positioning pin cannot be pulled out smoothly;

3. when the blind pin is removed from the pin remover, the central screw needs to be reversely rotated, and the condition that the central screw is unscrewed from the chuck easily occurs at the moment; at this time, the operator needs to apply a downward force to the center screw while rotating the center screw, which is inconvenient.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model aims to provide the blind pin puller, which can clamp a blind pin by using the fixing piece in threaded fit with the bottom end of the pin pulling chuck by arranging the through hole at the bottom end of the pin pulling chuck and arranging the notch, so that the blind pin can be conveniently pulled out; simple structure, convenient operation, and can not produce the damage to product spare part and blind round pin at the pin in-process of pulling out.

In order to achieve the above object, the present utility model is realized by the following technical scheme:

the utility model provides a blind pin puller, includes the guide bar, and the slider has been cup jointed in the guide bar middle section, and the guide bar top is equipped with the step in order to support the slider, and guide bar bottom fixed connection pulls out the first end of round pin chuck, pulls out the through-hole that the round pin chuck second end was opened to have and is used for pressing from both sides tight blind pin, evenly opens at through-hole department along pulling out round pin chuck axis direction has a plurality of openings, pulls out round pin chuck second end week side and mounting threaded connection, and the through-hole internal diameter is less than blind pin external diameter.

As a further implementation, the diameter of the top end of the guide rod is larger than the diameter of the middle section of the guide rod.

As a further implementation manner, the first end of the pin pulling chuck is provided with a threaded hole.

As a further implementation mode, the bottom end of the guide rod is provided with external threads, and the bottom end of the guide rod is matched with the threaded hole through the external threads.

As a further implementation manner, the first end of the pin pulling chuck is of an external hexagonal structure.

As a further implementation mode, the diameter of the circumcircle of the first end of the pin pulling chuck is larger than that of the middle section of the guide rod.

As a further implementation, the fixing member is a hexagon nut.

As a further implementation manner, the openings are uniformly arranged at intervals of 60 degrees or 120 degrees along the circumferential direction of the through hole.

As a further implementation mode, the sliding block is cylindrical, through holes are formed in the sliding block along the axis direction and are used for being in sliding fit with the middle section of the guide rod, and threaded holes are formed in two sides of the sliding block.

As a further implementation, the slider is screwed with the slider handle by a threaded hole.

The beneficial effects of the utility model are as follows:

1. according to the blind pin pulling device, the through hole is formed in the bottom end of the pin pulling chuck, the notch is formed in the bottom end of the pin pulling chuck, the blind pin can be clamped by the pin pulling chuck through the threaded fit of the fixing piece and the bottom end of the pin pulling chuck, the blind pin is conveniently pulled out, and the requirement on the wall thickness of the chuck is not required too much.

2. In actual operation, the pin pulling operation can be completed by only one person, the structure is simple, the operation is convenient, and damage to product parts and blind pins can not be caused in the pin pulling process; and the blind pins corresponding to different specifications only need to be replaced by the unused pin pulling clamping heads and fixing pieces, so that the universality is strong.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.

Fig. 1 is a schematic view of the overall structure of a blind pin puller according to an embodiment of the present utility model.

Fig. 2 is a schematic diagram of a prior art blind pin puller.

Fig. 3 is a cross-sectional view of A-A in fig. 2.

In the figure: the mutual spacing or dimensions are exaggerated for the purpose of showing the positions of the various parts, and the schematic illustration is only schematic.

Wherein: 1. the clamping device comprises a front pull rod, a clamping head, a central screw, a pulling pin hole, a notch, a rear pull rod, a shaft shoulder, a sliding hammer, a plane and a clamp spring, wherein the front pull rod, the clamping head, the central screw, the pulling pin hole, the notch, the rear pull rod, the shaft shoulder, the sliding hammer, the plane and the clamp spring are arranged in sequence, and the clamping spring is arranged in sequence;

11. the guide rod, 12, the pin pulling chuck, 13, the hexagon nut, 14, the slider, 15 and the slider handle.

Detailed Description

It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the utility model. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs.

Example 1

Blind pin: i.e. a non-porous cylindrical pin, which has no threads and no through holes at the bottom of the pin holes.

The prior art is as shown in fig. 2 and 3, and the blind pin puller structurally comprises a front pull rod 1, a chuck 2, a central screw 3, a pull pin hole 4, a notch 5, a rear pull rod 6, a shaft shoulder 7, a sliding hammer 8, a plane 9 and a clamp spring 10. The middle of the front pull rod is provided with a through hole, the lower end of the front pull rod is provided with a counter bore, and the end part of the counter bore at the lower end is provided with a conical horn mouth. The upper end of the chuck is a cylinder, the lower end of the chuck is a conical head with a large lower part and a small upper part, the upper end of the chuck is a screw hole, the lower end of the chuck is a pin pulling hole, and a slot is formed from a hole arm of the pin pulling hole to the lower end. The conical surface of the conical head of the chuck 2 is matched with the conical horn mouth of the front pull rod 1, and a distance is reserved between the upper end of the chuck and the bottom of the counter bore at the lower end of the front pull rod. The lower end thread of the center screw is matched with the screw hole at the upper end of the chuck, and the head of the center screw is positioned in the counter bore at the upper end of the front pull rod. The rear pull rod is connected with the front pull rod through threads.

When the blind pin is used, the chuck 2 is inserted into the blind pin, the central screw 3 is rotated by a spanner tool extending into the through hole of the rear pull rod 6, and when the chuck 2 is pulled upwards due to the existence of the conical surface and the notch 5, the inner diameter of the pin hole of the chuck 2 is contracted, and the blind pin is tightly clamped by the pin hole. At this time, the blind pin is pulled out by pushing the slide hammer 8 upward to hammer the pin puller, which has the technical problems pointed out in the background art.

In an exemplary embodiment of the present utility model, referring to fig. 1, a blind pin puller includes a guide bar 11 having a set length and divided into three sections along the length direction, which are divided into a guide bar top end, a guide bar middle section and a guide bar bottom end, taking a vertical placement state of the guide bar 11 as an example.

The slider 14 has been cup jointed to the guide bar middle section week side, realizes that guide bar 11 and slider 14 slide cup joint, and guide bar top diameter is greater than guide bar middle section diameter, realizes that the guide bar top is equipped with the step for the guide bar middle section, and the step forms in guide bar top and guide bar middle section junction, and the step is used for supporting slider 14, restriction slider 14's position prevents that slider 14 from following the guide bar top and deviate from along the gliding in-process in guide bar middle section upwards.

The bottom end of the guide rod is fixedly connected with the first end of the pin pulling chuck 12, and the second end of the pin pulling chuck is provided with a through hole for clamping the blind pin. A plurality of openings are uniformly formed at the through hole along the axial direction of the pin pulling chuck 12, and the second end circumference side of the pin pulling chuck is in threaded connection with a fixing piece (a hexagon nut 13).

The inner diameter of the through hole is smaller than the outer diameter of the blind pin, and due to the existence of the notch, the bottom end of the pin pulling chuck 12 can be properly expanded outwards when being matched with the blind pin, so that the pin pulling chuck 12 is wrapped on the periphery of the top of the blind pin. By rotating the fixing piece, the blind pin is clamped at the bottom end of the pin pulling joint, and the blind pin is pulled out through the sliding block 14.

Taking the view direction of fig. 1 as an example, the first end of the pin pulling chuck 12 is the top end of the pin pulling chuck, and the second end of the pin pulling chuck 12 is the bottom end of the pin pulling chuck.

Specifically, the diameter of the middle section of the guide rod is equal to the diameter of the bottom end of the guide rod, the bottom end of the guide rod is provided with external threads, the first end of the pin pulling chuck is provided with a threaded hole, and the bottom end of the guide rod is fixedly matched with the threaded hole through the external threads.

In order to limit the sliding block 14 when moving downwards along the guide rod, the first end of the pin pulling chuck is of an external hexagonal structure, and the diameter of the circumcircle of the first end of the pin pulling chuck is larger than the diameter of the middle section of the guide rod. The first end of the pin pulling chuck is of an external hexagonal structure, so that the pin pulling chuck is conveniently connected with the bottom end of the guide rod by threads by using a spanner.

It can be understood that the second end of the pin pulling chuck is cylindrical, a through hole is formed in the second end of the pin pulling chuck, a plurality of openings are formed in the side wall surface of the through hole at the second end of the pin pulling chuck, and the openings are uniformly formed at intervals of 120 degrees along the circumferential direction of the through hole, so that three openings are formed. In other examples, six notches may be provided at 60 ° intervals. The gap has a set length, but the length of the gap is smaller than the length of the through hole.

The mounting is hexagon nut 13, before pressing from both sides tight blind round pin, and hexagon nut 13 cooperation is close to top position at the chuck second end of pulling out the round pin, and this cooperation part does not set up the opening, and the opening is close to the chuck second end bottom of pulling out the round pin and sets up, is convenient for when pulling out the outside expansion of pin chuck second end, can not receive the influence of hexagon nut 13 fastening.

Further, the sliding block 14 is cylindrical, the sliding block acts as a sliding hammer, a through hole is formed in the sliding block 14 along the axis direction and is used for being in sliding fit with the middle section of the guide rod, and threaded holes are formed in two sides of the sliding block 14. The slider 14 is screwed with the slider handle 15 through a screw hole. The two slider handles 15 of this embodiment are perpendicular to the slider 14, and the slider handles 15 are used in cooperation with the slider 14, so that the operation is convenient when the blind pin is pulled out.

It should be noted that, in the present embodiment, the form of the slider 14 and the slider handle 15 is only convenient for use, and may be designed in other forms; the shape, position and number of the openings in the pin extraction chuck 12 can also be freely selected according to different working conditions.

The inner diameter of the through hole at the bottom end of the pin pulling chuck is slightly smaller than the outer diameter of the blind pin, when the pin pulling chuck is used, the hexagonal nut 13 is screwed to a position close to the upper end of the pin pulling chuck by using a corresponding wrench, no gap exists at the position, and then the pin pulling chuck 12 is inserted into the top end of the blind pin (the blind pin can be smashed by using a rubber hammer and other tools), so that the pin pulling chuck 12 and the blind pin are in interference fit and clamped.

The hexagonal nut 13 is screwed down to the notch by using a spanner, so that the blind pin is clamped by the pin pulling chuck through the hexagonal nut 13, the sliding block 14 is pushed upwards, the pin puller is hammered, and the blind pin is pulled out.

According to the blind pin pulling device, through holes are formed in the bottom ends of the pin pulling chucks and the openings are formed in the bottom ends of the pin pulling chucks, and the blind pins can be clamped by the pin pulling chucks 12 through threaded fit of the hexagonal nuts (fixing pieces) and the bottom ends of the pin pulling chucks, so that the blind pins can be pulled out conveniently. The fixing effect of the hexagon nut 13 solves the problems that in the prior art, certain requirements are required on the wall thickness of the front pull rod and the chuck at the pin hole, usability is affected by the fact that the front pull rod and the chuck are too thin or too thick, and therefore the pin puller with different specifications is required to be designed and processed for cylindrical pins with each specification, and the universality is poor.

During actual operation, the pin pulling operation can be completed by only one person, the operation is simple and convenient, and the pin pulling efficiency is high; the cylindrical pins corresponding to different specifications can be replaced by the pin pulling clamping heads and the fixing pieces which are not needed, so that the universality is high.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The utility model provides a blind pin puller, its characterized in that, including the guide bar, the slider has been cup jointed to the guide bar middle section, and the guide bar top is equipped with the step in order to support the slider, and guide bar bottom fixed connection pulls out the first end of round pin chuck, pulls out the through-hole that the round pin chuck second end was opened to have and is used for pressing from both sides tight blind pin, evenly opens a plurality of openings along pulling out round pin chuck axis direction in through-hole department, pulls out round pin chuck second end week side and mounting threaded connection, and the through-hole internal diameter is less than blind pin external diameter.

2. The blind pin puller of claim 1, wherein the diameter of the top end of the guide bar is greater than the diameter of the middle section of the guide bar.

3. The blind pin puller of claim 1, wherein the pin puller jaw is threaded at a first end thereof.

4. A blind pin puller according to claim 3, wherein the bottom end of the guide bar is provided with external threads, and the bottom end of the guide bar is engaged with the threaded hole by the external threads.

5. The blind pin puller of claim 4, wherein said pin puller first end is of an external hexagonal configuration.

6. The blind pin puller of claim 5, wherein the diameter of the circumcircle at the first end of the pin puller is greater than the diameter of the middle section of the guide bar.

7. The blind pin puller of claim 1, wherein said fastener is a hex head nut.

8. The blind pin puller according to claim 1, wherein the slits are uniformly opened at intervals of 60 ° or 120 ° along the circumferential direction of the through hole.

9. The blind pin puller according to claim 1, wherein the slider is cylindrical, a through hole is formed in the slider along the axial direction and is used for sliding fit with the middle section of the guide rod, and threaded holes are formed in two sides of the slider.

10. The blind pin puller of claim 9, wherein the slider is threadably connected to the slider handle by a threaded hole.