Core pulling device suitable for single-face connecting bolt of large venue

Abstract

The utility model relates to the field of core-pulling devices, in particular to a core-pulling device suitable for a single-face connecting bolt in a large venue, which comprises a device shell and a handle, the front end of the device shell is provided with a central through hole I, and the rear end of the device shell is connected with the handle; the interior of the device shell is movably connected with a core column, the core column comprises a core column shell and claw pieces arranged in the core column shell, and a second center through hole is formed in the front end of the core column shell; the number of the claw pieces is not less than three, the claw pieces are circumferentially spliced into a column body around the central axis of the core column, and the front ends of the claw pieces extend out of the central through hole I and the central through hole II; the interior of the core column shell is slidably connected with a supporting plate, the front side of the supporting plate is elastically connected with a pushing block, and the pushing block abuts against the rear ends of the claw pieces; and the rear end of the core column shell is connected with a power mechanism in the handle. The device is compact and small in overall structure, convenient to carry and capable of being better suitable for high-altitude operation.

Description

Technical Field

[0001] The utility model relates to the field of core pulling devices, in particular to a core pulling device suitable for single-sided connecting bolts of large venues. Background Art

[0002] When connecting some compact structures, due to the relatively narrow installation space, ordinary bolts and nuts cannot meet the installation requirements of these occasions because they need to be installed on both sides. Therefore, rivets are generally used to fasten in these narrow spaces. However, some structural connection strength requirements are relatively high, and rivets cannot meet their requirements.

[0003] In view of the above situation, a single-sided connection bolt developed for narrow space or inconvenient installation on both sides of the connected parts has appeared on the market. The single-sided connection bolt includes a bolt column, a nut, a flat washer and a limiter. The front end of the bolt column is provided with a slot, and the limiter is rotated in the slot. The rear end of the bolt column is a threaded section, and the threaded section is covered with a flat washer and a nut. A slot hole that passes through the slot is provided inside the rear end of the bolt column. The slot hole runs through the rear end of the bolt column. A locking component is provided in the slot hole and pushed into the groove of the limiter to serve as a switch for the rotation of the limiter. In actual installation, the single-sided connection bolt is inserted into the prefabricated bolt hole on the rectangular steel pipe column and the end plate. After insertion, the locking component at the rear end of the bolt column is pulled out. The limiter is not subject to the limiting force of the locking component. The spring pops out the limiter to position it, and then tightens the nut from the outside of the connection to complete the node assembly. In this structure, the locking component limits the limiter. When installing the single-sided connection bolt, the locking component needs to be pulled out to complete the installation of the single-sided connection bolt.

[0004] Some workers on site used pliers to extract the locking parts, but because the single-sided connecting bolts were not fixed, they needed to use the other hand to fix the single-sided connecting bolts while extracting the core, which was laborious and easy to fail in extracting the core. The locking parts in the single-sided connecting bolts were similar to the core column of the rivet. Some workers often used rivet guns to pull off the rivet core column according to the extraction of the rivet core column, and used rivet guns to extract the core. However, since the pulling force required to pull off the rivet core column is large, the size of each rivet gun is large, which is inconvenient to carry during high-altitude operations and difficult to operate, resulting in increased construction difficulty. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a core pulling device for single-sided connecting bolts suitable for large venues, so as to achieve a compact and small structure, easy to carry, and meet the needs of high-altitude operations.

[0006] To achieve this technical purpose, the utility model adopts the following scheme:

[0007] A core pulling device for a single-sided connecting bolt suitable for large venues, comprising a device housing and a handle, wherein a central through hole is provided at the front end of the device housing, and a rear end is connected to the handle;

[0008] The device housing is movably connected with a core column, which includes a core column housing and a claw piece arranged inside the core column housing. The front end of the core column housing is provided with a second central through hole;

[0009] There are no less than three claws, which are assembled around the central axis of the core column to form a column, and the front ends of the claws extend out of the first central through hole and the second central through hole;

[0010] A support plate is slidably connected inside the core column housing, a push block is elastically connected to the front side of the support plate, and the push block abuts against the rear end of the claw piece;

[0011] The rear end of the core column shell is connected with the power mechanism inside the handle.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model clamps the locking component with the help of claws, and then pulls the core column backwards through a power mechanism to pull the core out. The utility model has a compact structure and is easy to operate. The overall structure is small and convenient to carry, and the utility model can better adapt to high-altitude operations.

[0014] Further, the preferred embodiment of the present invention is:

[0015] The power mechanism includes a gear shaft, an arc-shaped handle and a push rod. The two ends of the gear shaft are rotatably connected to the side walls of the handle respectively. A small gear is arranged in the middle of the gear shaft. Large gears are arranged on both sides of the small gear respectively.

[0016] A movable groove is provided at the bottom of the handle corresponding to the arc handle, and the arc handle extends out of the movable groove; the arc handle includes a connecting rod and an arc rack, the upper end of the connecting rod is hinged to the inner wall of the handle, the lower end of the connecting rod is connected to the lower end of the arc rack, and the arc rack is meshed with the pinion;

[0017] The rear end of the core column housing is respectively provided with a push rod corresponding to the two large gears, and the lower surface of each push rod is respectively provided with teeth meshing with the large gears.

[0018] A return spring is arranged between the bottom of the handle and the connecting rod.

[0019] The device shell includes a front shell, a middle shell and a rear shell. The end of the front shell is provided with a central through hole. The front shell is threadedly connected with the middle shell, the middle shell is threadedly connected with the rear shell, and the rear shell is fixedly connected with the handle.

[0020] The core column shell includes a core column front section shell, a core column middle section shell and a core column rear section shell. The front end of the core column front section shell is provided with a central through hole 2. The core column front section shell and the core column middle section shell are threadedly connected, the core column middle section shell and the core column rear section shell are threadedly connected, and the core column rear section shell is connected to the push rod.

[0021] A cross slide bar is arranged on the rear surface of the support plate, and a cross slideway 1 adapted to the cross slide bar is arranged on the middle shell of the core column. The support plate slides inside the middle shell of the core column through the cooperation of the cross slide bar and the cross slideway 1.

[0022] A cross slide 2 is arranged on the middle shell corresponding to the cross slide 1 on the middle shell of the core column, and four ends of the cross slide rod respectively correspond to the cross slide 1 and the cross slide 2 and extend to the outside of the middle shell.

[0023] The upper surface of the handle is provided with wave patterns.

[0024] The inner surface of the claw piece is provided with a groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the single-sided connection bolt before the core is pulled out;

[0026] Figure 2 It is a schematic diagram of the structure after the core of the single-sided connection bolt is pulled out;

[0027] Figure 3 It is a schematic diagram of the structure of the utility model;

[0028] Figure 4 It is a schematic diagram of the split structure of the utility model;

[0029] Figure 5 It is a schematic diagram of the structure inside the stem and the handle;

[0030] Figure 6 Schematic diagram of the internal structure of the core column;

[0031] Figure 7 for Figure 5 A magnified view of part A;

[0032] Figure 8 for Figure 7 B-direction view;

[0033] The markings in the figure are: device shell 1; front shell 101; middle shell 102; rear shell 103; center through hole 1 104; center through hole 2 204; core column 2; core column front shell 201; core column middle shell 202; core column rear shell 203; handle 3; claw piece 4; push block 5; spring 6; support plate 7; cross slide bar 8; slideway 1 9; push rod 10; gear shaft 11; large gear 12; small gear 13; rotating shaft 14; connecting rod 15; arc rack 16; slideway 2 17; reset spring 18. DETAILED DESCRIPTION

[0034] In order to fully understand the purpose, features and effects of the present invention, the present invention is described in detail through the following specific implementation methods, but the present invention is not limited thereto.

[0035] A core pulling device for single-sided connecting bolts suitable for large venues comprises a device housing 1, a handle 3 and a core column 2 arranged inside the device housing 1.

[0036] The device shell 1 is composed of a front shell 101, a middle shell 102 and a rear shell 103. The front end of the front shell 101 is provided with a central through hole 104. The front shell 101 and the middle shell 1020 are threadedly connected, the middle shell 102 and the rear shell 103 are also threadedly connected, and the rear shell 103 is fixedly connected to the handle 3.

[0037] The device housing 1 has a stem 2 movably mounted inside, and the stem 2 is composed of a stem housing and a claw piece 4 placed inside the stem housing. The stem housing is composed of a stem front housing 201, a stem middle housing 202, and a stem rear housing 203, wherein a central through hole 204 is provided at the front end of the stem front housing 201, the stem front housing 201 is threadedly connected to the stem middle housing 202, and the stem middle housing 202 is threadedly connected to the stem rear housing 203.

[0038] Three claw pieces 4 are movably installed inside the outer shell 201 of the front section of the core column, and the inner surface of the claw piece 4 is provided with a groove. The three claw pieces 4 are assembled circumferentially around the central axis of the core column 2 to form a column, and the column gradually becomes thicker from front to back; the front end of the claw piece 4 slightly protrudes from the center through hole 204 and the center through hole 1 104, and the three claw pieces 4 are used to clamp the end of the locking component.

[0039] The interior of the middle shell 202 of the core column is also slidably connected with a support plate 7, and a spring 6 is installed on the front surface of the support plate 7. The front end of the spring 6 is fixed to the push block 5, and the front end of the push block 5 is against the rear ends of the three claw pieces 4. The push block 4 provides forward thrust for the three claw pieces 4 under the elastic force of the spring 6.

[0040] A cross slide bar 8 is fixed to the rear surface of the support plate 7, and a slideway 9 adapted to the four ends of the cross slide bar is respectively provided on the front, rear upper and lower surfaces of the core column intermediate shell 202. The support plate 7 slides inside the core column intermediate shell 202 through the cooperation of the cross slide bar 8 and the slideway 9.

[0041] In this embodiment, slideways 17 are also provided on the front, rear, upper and lower surfaces of the middle shell 102 of the device shell, respectively. Slideway 17 corresponds to the inside and outside of slideway 1 9 to ensure that the four ends of the cross slide bar 8 extend from slideway 1 9 and slideway 17 to the outside of the middle shell 102.

[0042] A power mechanism is arranged inside the handle 3, which consists of a gear shaft 11, an arc-shaped handle and a push rod 10. The two ends of the gear shaft 11 are rotatably connected to the front and rear side walls of the handle 3 respectively. A small gear 13 is fixedly installed in the middle of the gear shaft 11, and a large gear 12 is fixedly installed on both sides of the small gear 13 of the gear shaft 11. The large gear 12 and the small gear 13 rotate coaxially with the gear shaft 11.

[0043] A movable groove is provided at the bottom of the handle 3 corresponding to the arc-shaped handle, and the arc-shaped handle can move up and down in the movable groove; the arc-shaped handle is composed of a connecting rod 15 and an arc-shaped rack 16, and the interior of the handle 3 is rotatably connected with a rotating shaft 14 between the front and rear side walls, and the middle part of the rotating shaft 14 is fixedly installed with a connecting rod 14 corresponding to the position of the pinion 13 on the gear shaft 11, and the connecting rod 14 extends obliquely downward to the outside of the handle 3 and is fixedly connected to the lower end of the arc-shaped rack 16, and the upper part of the arc-shaped rack 16 is meshed with the pinion 13 for transmission, pushing the connecting rod 15, and the connecting rod 15 drives the meshing transmission of the arc-shaped rack 16 and the pinion 13, thereby driving the gear shaft 11 to rotate.

[0044] Two push rods 10 are installed on the rear shell 203 of the core column corresponding to the two large gears 12. The lower surface of each push rod 10 is provided with teeth meshing with the large gear 12. When the arc-shaped handle drives the gear shaft 11 to rotate, the large gear 12 thereon is driven to rotate, and the push rod 10 is moved through the meshing transmission between the large gear 12 and the teeth.

[0045] In this embodiment, in order to ensure that the arc-shaped handle can be reset smoothly, the connecting rod 15 is connected to the bottom of the handle 3 through a reset spring 18.

[0046] In this embodiment, in order to increase the friction of the handle 3 , a wave pattern is added to the upper surface of the handle 3 .

[0047] When the device is in use, the locking component is placed between the three claw pieces 4, and then the front end of the device shell is placed against the screw rod, and the arc handle is pressed upward. The arc handle drives the gear shaft 11 to rotate through the small gear 13, and then the large gear 12 also rotates accordingly. The meshing transmission between the large gear 12 and the teeth on the push rod 10 causes the push rod 10 to move backward and pull the stem 2 backward. When the cross slide bar in the stem 2 moves to the rearmost support plate 7 of the slideways one and two and no longer moves backward, and the stem shell continues to move backward, the arc handle is continued to be pressed. At this time, the front section shell 201 of the stem gradually moves backward to shrink the claw piece 4, and the three claw pieces 4 tighten the locking component until the locking component is pulled out of the groove of the limiting piece. The limiting piece pops out under the action of its torsion spring to limit the screw rod; after the extraction is completed, the arc handle is released, and the stem is reset under the action of the reset spring.

[0048] In the utility model, while the core column is pulled backward by gear transmission, the spring provides a forward thrust for the claw piece, so that the core column shell clamps the claw piece, causing the claw piece to contract and clamp the locking component to complete the core pulling. The structure is small and compact, easy to operate, and easy to carry. Compared with traditional larger rivet guns, it is better suitable for high-altitude operations.

[0049] Finally, it should be noted that the above-listed examples are only preferred embodiments of the present invention. Of course, those skilled in the art can make changes and modifications to the present invention. If these modifications and modifications fall within the scope of the claims of the present invention and their equivalent technologies, they should be considered to be within the scope of protection of the present invention.

Claims

1. A core pulling device for single-sided connecting bolts suitable for large venues, comprising a device housing and a handle, characterized in that: The front end of the device housing is provided with a central through hole 1, and the rear end is connected to the handle; The device housing is movably connected with a core column, which includes a core column housing and a claw piece arranged inside the core column housing. The front end of the core column housing is provided with a second central through hole; There are no less than three claws, which are assembled around the central axis of the core column to form a column, and the front ends of the claws extend out of the first central through hole and the second central through hole; A support plate is slidably connected inside the core column housing, a push block is elastically connected to the front side of the support plate, and the push block abuts against the rear end of the claw piece; The rear end of the core column shell is connected with the power mechanism inside the handle.

2. The core-pulling device for single-sided connecting bolts suitable for large venues according to claim 1 is characterized in that: The power mechanism includes a gear shaft, an arc-shaped handle and a push rod. The two ends of the gear shaft are rotatably connected to the side walls of the handle respectively. A small gear is arranged in the middle of the gear shaft. Large gears are arranged on both sides of the small gear respectively. A movable groove is provided at the bottom of the handle corresponding to the arc handle, and the arc handle extends out of the movable groove; the arc handle includes a connecting rod and an arc rack, the upper end of the connecting rod is hinged to the inner wall of the handle, the lower end of the connecting rod is connected to the lower end of the arc rack, and the arc rack is meshed with the pinion; The rear end of the core column housing is respectively provided with a push rod corresponding to the two large gears, and the lower surface of each push rod is respectively provided with teeth meshing with the large gears.

3. The core-pulling device for single-sided connecting bolts suitable for large venues according to claim 2 is characterized in that: A return spring is arranged between the bottom of the handle and the connecting rod.

4. The core-pulling device for single-sided connecting bolts suitable for large venues according to claim 2 is characterized in that: The device shell includes a front shell, a middle shell and a rear shell. The end of the front shell is provided with a central through hole. The front shell is threadedly connected with the middle shell, the middle shell is threadedly connected with the rear shell, and the rear shell is fixedly connected with the handle.

5. The core-pulling device for single-sided connecting bolts suitable for large venues according to claim 4 is characterized in that: The core column shell includes a core column front section shell, a core column middle section shell and a core column rear section shell. The front end of the core column front section shell is provided with a central through hole 2. The core column front section shell and the core column middle section shell are threadedly connected, the core column middle section shell and the core column rear section shell are threadedly connected, and the core column rear section shell is connected to the push rod.

6. The core-pulling device for single-sided connecting bolts suitable for large venues according to claim 5 is characterized in that: A cross slide bar is arranged on the rear surface of the support plate, and a cross slideway 1 adapted to the cross slide bar is arranged on the middle shell of the core column. The support plate slides inside the middle shell of the core column through the cooperation of the cross slide bar and the cross slideway 1.

7. The core-pulling device for single-sided connecting bolts suitable for large venues according to claim 6 is characterized in that: A cross slide 2 is arranged on the middle shell corresponding to the cross slide 1 on the middle shell of the core column, and four ends of the cross slide rod respectively correspond to the cross slide 1 and the cross slide 2 and extend to the outside of the middle shell.

8. The core-pulling device for single-sided connecting bolts suitable for large venues according to claim 1 is characterized in that: The upper surface of the handle is provided with wave patterns.

9. The core-pulling device for single-sided connecting bolts suitable for large venues according to claim 1 is characterized in that: The inner surface of the claw piece is provided with a groove.

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