Narrow space bolt dismounting device

Abstract

A narrow space bolt dismounting device comprises a box body, a rotating shaft and a screwing shaft are longitudinally installed in the box body, the upper end of the rotating shaft extends out of the box body, a first screwing part is arranged at the upper end of the rotating shaft, the upper end and the lower end of the screwing shaft penetrate through the box body, and a through hexagonal hole is formed in the center of the screwing shaft. A transmission shaft is further installed in the box body, and the two ends of the transmission shaft are in gear transmission connection with the rotating shaft and the screwing shaft respectively. The head of the hexagonal head bolt is sleeved with the hexagonal hole of the screwing shaft, the first screwing part is rotated, and the screwing shaft is driven to rotate through the transmission shaft, so that the hexagonal head bolt in a narrow space is screwed, and the hexagonal head bolt is more convenient to disassemble.

Description

Technical Field

[0001] The utility model relates to the technical field of maintenance work auxiliary tools, in particular to a bolt removal device in a narrow space. Background Art

[0002] See also Figure 6 , 7 , is a narrow space encountered during maintenance operations. A hexagonal bolt 9 is installed in this narrow space. The narrow space is roughly L-shaped, and the hexagonal bolt 9 is located at the bottom of the L-shaped narrow space. Since the upper gap of the narrow space is small, when removing the bolt, especially in the early stage of removal (after the bolt is loosened, it will be easier to twist it later), the hexagonal bolt 9 is installed tightly. Although the fixed wrench can reach into the narrow space, it is necessary to rotate and force to twist the bolt, and the gap on the upper side is not convenient for hand holding and rotating. In order to remove this bolt, we vertically welded a longitudinal rod on the end of the fixed wrench away from the bayonet. When in use, the bayonet of the fixed wrench is stuck on the hexagonal bolt 9, and the longitudinal rod extends from the upper gap. The connection between the longitudinal rod and the fixed wrench is hit by a hand hammer to loosen the hexagonal bolt 9. However, when striking, the bayonet of the fixed wrench will be separated from the hexagonal bolt 9 due to vibration, and the bayonet of the fixed wrench needs to be repeatedly clamped on the hexagonal bolt 9. Since the narrow space is not convenient for observation, it is inconvenient to use. Utility Model Content

[0003] The technical problem to be solved by the utility model is: to solve the problems existing in the above-mentioned background technology and to provide a bolt removal device in a narrow space. The hexagonal hole of the twisting shaft is covered on the head of the hexagonal bolt, and the first twisting part is rotated to drive the twisting shaft to rotate through the transmission shaft, so as to twist the hexagonal bolt in the narrow space, making the removal of the hexagonal bolt more convenient.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a bolt removal device in a narrow space, including a box body, in which a rotating shaft and a twisting shaft are longitudinally installed, the upper end of the rotating shaft extends out of the box body, and a first twisting part is arranged at the upper end of the rotating shaft, the upper and lower ends of the twisting shaft pass through the box body, and a penetrating hexagonal hole is arranged at the center of the twisting shaft, a transmission shaft is also installed in the box body, and the two ends of the transmission shaft are respectively connected to the rotating shaft and the twisting shaft gear transmission.

[0005] A first bevel gear is arranged on the rotating shaft in the box body, and a second bevel gear is installed on one end of the transmission shaft connected with the rotating shaft. The first bevel gear and the second bevel gear are meshed for transmission.

[0006] A turbine is arranged on the twisting shaft in the box body, and a worm part is arranged at one end of the transmission shaft connected with the twisting shaft, and the turbine and the worm part are meshed for transmission.

[0007] The box body includes a lower shell and a cover body, and the cover body is installed above the lower shell; a first partition and a second partition are arranged in the lower shell, and the first partition and the second partition divide the lower shell into a first chamber, a second chamber and a third chamber. The rotating shaft is located in the first chamber, and the lower end of the rotating shaft is connected to the lower shell bearing, and the upper end is connected to the cover body bearing. The twisting shaft is located in the third chamber, and the lower end of the twisting shaft is connected to the lower shell bearing, and the upper end is connected to the cover body bearing. The transmission shaft passes through the first partition and the second partition, and is connected to the first partition, the second partition and the side wall bearings of the lower shell.

[0008] A pad is installed at the bottom of the box body, so that the box body is suspended below the twisting shaft.

[0009] A limiting screw is also installed on the box body, and a positioning ring is provided at the bottom of the box body. The lower end of the limiting screw penetrates into the box body from the top of the box body and extends into the positioning ring. A limiting ring is also installed on the limiting screw in the box body, and the limiting ring is located on the lower side of the cover body. A second screwing part is provided on the upper end of the limiting screw, and the limiting block is screwed on the limiting screw.

[0010] A notch is arranged on the upper side of one end of the limiting block.

[0011] The first twisting portion and the second twisting portion are quadrilateral or hexagonal column structures.

[0012] It also includes an extension rod, one end of which is provided with a joint for sleeve-fitting with the first twisting part.

[0013] The utility model has the following beneficial effects:

[0014] 1. The utility model covers the head of the hexagonal bolt with the hexagonal hole of the twisting shaft, rotates the first twisting part, and the transmission shaft drives the twisting shaft to rotate, thereby twisting the hexagonal bolt in a narrow space, making it more convenient to disassemble the hexagonal bolt.

[0015] 2. The utility model has a pad installed at the bottom of the box body, so that the box body is suspended below the twisting shaft. The suspended position below the box body avoids the height of the flat washer and the spring washer, so that the box body can be placed stably.

[0016] 3. The utility model provides a limit screw and a limit block is threadedly connected to the limit screw. When the limit screw is rotated by the second twisting part, the limit block can rise, and the limit block abuts against the upper side of the narrow space to fix the disassembly device. When in use, there is no need to hold the box body with hands.

[0017] 4. The utility model also includes an extension rod, one end of which is provided with a joint for fitting with the first twisting part. The first twisting part is rotated by the extension rod, which is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 It is a schematic diagram of the main structure of the utility model.

[0020] Figure 2 It is a schematic diagram of the structure of the utility model from top view.

[0021] Figure 3 It is a schematic diagram of the longitudinal sectional structure of the utility model.

[0022] Figure 4 It is a schematic diagram of the transverse sectional structure of the utility model.

[0023] Figure 5 This is a schematic diagram of the twisting shaft structure of the utility model.

[0024] Figure 6 The use status of this utility model Figure 1 .

[0025] Figure 7 The use status of this utility model Figure 2 .

[0026] In the figure: box body 1, lower shell body 11, first partition plate 111, second partition plate 112, first chamber 113, second chamber 114, third chamber 115, positioning ring 116, cover body 12, rotating shaft 2, first bevel gear 21, first screwing part 22, screwing shaft 3, turbine 31, hexagonal hole 32, transmission shaft 4, second bevel gear 41, worm part 42, limit screw 5, limit ring 51, second screwing part 52, limit block 6, notch 61, gasket 7, extension rod 8, hexagonal head bolt 9. DETAILED DESCRIPTION

[0027] like Figure 1-5 As shown, a bolt disassembly device for a narrow space includes a box body 1, a rotating shaft 2 and a twisting shaft 3 are longitudinally installed in the box body 1, the upper end of the rotating shaft 2 extends out of the box body 1, and the upper end of the rotating shaft 2 is provided with a first twisting portion 22, the upper and lower ends of the twisting shaft 3 pass through the box body 1, and the center of the twisting shaft 3 is provided with a penetrating hexagonal hole 32, and a transmission shaft 4 is also installed in the box body 1, and the two ends of the transmission shaft 4 are respectively connected with the rotating shaft 2 and the twisting shaft 3 by gear transmission. By putting the hexagonal hole 32 of the twisting shaft 3 on the head of the hexagonal head bolt 9, by rotating the first twisting portion 22, the twisting shaft 3 is driven to rotate through the transmission shaft 4, so as to twist the hexagonal head bolt 9 in the narrow space, and the disassembly of the hexagonal head bolt is more convenient.

[0028] In a preferred embodiment, see Figure 3 , 4On the rotating shaft 2, a first bevel gear 21 is arranged inside the box body 1, and a second bevel gear 41 is installed at one end of the transmission shaft 4 connected to the rotating shaft 2, and the first bevel gear 21 and the second bevel gear 41 are meshed for transmission. On the screwing shaft 3, a turbine 31 is arranged inside the box body 1, and a worm part 42 is arranged at one end of the transmission shaft 4 connected to the screwing shaft 3, and the turbine 31 and the worm part 42 are meshed for transmission.

[0029] In addition to the above-mentioned structure, the transmission shaft 4 can also be connected to the rotating shaft 2 and the screwing shaft 3 through gear transmission, and other structures can also be used. For example, the transmission shaft 4 and the rotating shaft 2 are also driven by a worm gear structure, or the transmission shaft 4 and the screwing shaft 3 are also driven by a bevel gear structure.

[0030] For details, see Figure 3 , 4 The box body 1 includes a lower shell 11 and a cover 12, and the cover 12 is installed on the upper part of the lower shell 11 by bolts. A first partition 111 and a second partition 112 are arranged in the lower shell 11, and the first partition 111 and the second partition 112 divide the lower shell 11 into a first chamber 113, a second chamber 114 and a third chamber 115. The rotating shaft 2 is located in the first chamber 113, and the lower end of the rotating shaft 2 is connected to the bearing of the lower shell 11, and the upper end is connected to the bearing of the cover 12. The screwing shaft 3 is located in the third chamber 115, and the lower end of the screwing shaft 3 is connected to the bearing of the lower shell 11, and the upper end is connected to the bearing of the cover 12. The transmission shaft 4 passes through the first partition 111 and the second partition 112, and is connected to the first partition 111, the second partition 112 and the side wall bearing of the lower shell 11. Through the above structure, the rotation installation and positioning of the rotating shaft 2, the screwing shaft 3 and the transmission shaft 4 are realized.

[0031] When the hexagonal bolt 9 is installed with a flat washer and a spring washer, after the hexagonal hole 32 of the rotating shaft 3 is sleeved on the head of the hexagonal bolt 9, the box body 1 cannot remain stably flat, therefore, see Figure 1 , 3 A backing plate 7 is installed at the bottom of the box body 1, so that the box body 1 is suspended below the twisting shaft 3, and the suspended position below the box body 1 avoids the height of the flat washer and the spring washer. Specifically, the backing plate 7 can be installed at the bottom of the box body 1 by welding or bolts.

[0032] See also Figure 1 , 3The box body 1 is also provided with a limit screw 5, and a positioning ring 116 is provided at the bottom of the box body 1. The lower end of the limit screw 5 penetrates the box body 1 from the top of the box body 1 and extends into the positioning ring 116. A limit ring 51 is also provided on the limit screw 5 in the box body 1. The limit ring 51 is located at the lower side of the cover body 12. The upper end of the limit screw 5 is provided with a second screwing portion 52, and the limit block 6 is screwed on the limit screw 5. By providing the limit screw 5 and screwing the limit block 6 on the limit screw 5, when the limit screw 5 is rotated by the second screwing portion 52, the limit block 6 can rise, see Figure 6 The limiting block 6 abuts against the upper side of the narrow space to fix the disassembly device of the present application, so that there is no need to hold the box body 1 with hands when in use.

[0033] Furthermore, a notch 61 is provided on the upper side of one end of the limit block 6. When the limit block 6 abuts against the upper side of the narrow space, the notch 61 cooperates with the upper side of the narrow space to prevent the limit block 6 from rotating.

[0034] Preferably, the first twisting portion 22 and the second twisting portion 52 are quadrilateral or hexagonal column structures.

[0035] Furthermore, it also includes an extension rod 8, one end of which is provided with a joint for fitting with the first twisting portion 22. Figure 6 , 7 , the first twisting part 22 is rotated by extending the rod 8, which is convenient to use. When the first twisting part 22 is a quadrilateral or hexagonal column structure, the inner hole of the joint is also an adaptive quadrilateral or hexagonal shape.

[0036] The action process or principle of the utility model is as follows:

[0037] When using, see Figure 6 First, place the disassembly device in a narrow space, first turn the limit screw 5 to make the limit block 6 close to the box body 1, then hold the box body 1, and cover the head of the hexagonal head bolt 9 with the hexagonal hole 32 of the rotating shaft 3. Since it is inconvenient to observe, place the box body 1 on the hexagonal head bolt 9. When the box body 1 is flat, it can be inferred that the hexagonal hole 32 covers the head of the hexagonal head bolt 9. Then, hold the limit block 6 with one hand, and turn the limit screw 5 with the other hand through the extension rod 8, so that the limit block 6 rises and abuts against the upper side of the narrow space to fix the disassembly device.

[0038] After the disassembly device is fixed, the joint of the extension rod 8 is inserted into the first screwing portion 22 to drive the rotating shaft 2 to rotate. Figure 3The rotating shaft 2 drives the second bevel gear 41 to rotate through the first bevel gear 21, thereby driving the transmission shaft 4 to rotate, and the transmission shaft 4 drives the turbine 31 to rotate through the worm part 42, thereby driving the screwing shaft 3 to rotate. Thus, the hexagonal bolt 9 is screwed through the hexagonal hole 32 of the screwing shaft 3. Since the hexagonal hole 32 is through, when the hexagonal bolt 9 is loosened, Figure 7 , the head of the hexagonal bolt 9 will move up, but the disassembly device can remain fixed.

[0039] The disassembly device can be used not only for disassembly of the hexagonal head bolt 9, but also for final tightening of the hexagonal head bolt 9 during installation.

Claims

1. A bolt removal device for a narrow space, characterized by: The invention comprises a box body (1), wherein a rotating shaft (2) and a twisting shaft (3) are longitudinally mounted in the box body (1), wherein the upper end of the rotating shaft (2) protrudes out of the box body (1), and a first twisting portion (22) is arranged at the upper end of the rotating shaft (2), and the upper and lower ends of the twisting shaft (3) penetrate the box body (1), and a penetrating hexagonal hole (32) is arranged at the center of the twisting shaft (3), and a transmission shaft (4) is also mounted in the box body (1), and the two ends of the transmission shaft (4) are respectively connected to the rotating shaft (2) and the twisting shaft (3) by gear transmission.

2. A narrow space bolt removal device according to claim 1, characterized in that: A first bevel gear (21) is arranged on the rotating shaft (2) in the box body (1), and a second bevel gear (41) is installed on one end of the transmission shaft (4) connected to the rotating shaft (2). The first bevel gear (21) and the second bevel gear (41) are meshed for transmission.

3. The narrow space bolt removal device according to claim 1, characterized in that: A turbine (31) is provided on the twisting shaft (3) and is located inside the box body (1). A worm portion (42) is provided at one end of the transmission shaft (4) connected to the twisting shaft (3). The turbine (31) and the worm portion (42) are meshed for transmission.

4. A narrow space bolt removal device according to any one of claims 1 to 3, characterized in that: The box body (1) comprises a lower shell (11) and a cover body (12), wherein the cover body (12) is mounted above the lower shell (11); a first partition plate (111) and a second partition plate (112) are arranged in the lower shell (11), wherein the first partition plate (111) and the second partition plate (112) divide the lower shell (11) into a first chamber (113), a second chamber (114) and a third chamber (115); the rotating shaft (2) is located in the first chamber (113). The lower end of the rotating shaft (2) is connected to the bearing of the lower shell (11), and the upper end is connected to the bearing of the cover body (12); the screwing shaft (3) is located in the third chamber (115); the lower end of the screwing shaft (3) is connected to the bearing of the lower shell (11), and the upper end is connected to the bearing of the cover body (12); the transmission shaft (4) passes through the first partition plate (111) and the second partition plate (112), and is connected to the first partition plate (111), the second partition plate (112) and the side wall bearings of the lower shell (11).

5. The narrow space bolt removal device according to claim 1, characterized in that: A backing plate (7) is installed at the bottom of the box body (1), so that the box body (1) is suspended below the twisting shaft (3).

6. The narrow space bolt removal device according to claim 1, characterized in that: A limit screw (5) is also installed on the box body (1), and a positioning ring (116) is provided at the bottom of the box body (1). The lower end of the limit screw (5) penetrates into the box body (1) from the top of the box body (1) and extends into the positioning ring (116). A limit ring (51) is also installed on the limit screw (5) inside the box body (1), and the limit ring (51) is located on the lower side of the cover body (12). A second screwing portion (52) is provided at the upper end of the limit screw (5), and the limit block (6) is screwed on the limit screw (5).

7. The narrow space bolt removal device according to claim 6, characterized in that: A notch (61) is provided on the upper side of one end of the limiting block (6).

8. The narrow space bolt removal device according to claim 6, characterized in that: The first twisting portion (22) and the second twisting portion (52) are quadrilateral or hexagonal column structures.

9. The narrow space bolt removal device according to claim 1, characterized in that: It also comprises an extension rod (8), one end of which is provided with a joint for fitting with the first twisting portion (22).

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