Special wrench for disassembling bolt

Abstract

The utility model relates to the field of manual tools, in particular to a special wrench for disassembling a bolt, which comprises a wrench body, two clamping keys and a fastener, one end of the wrench body is provided with mounting holes for mounting the clamping keys, the fastener is used for fixing the two clamping keys in the mounting holes, and the two ends of the wrench body are provided with fastening holes for fastening the two clamping keys. The sides, close to each other, of the two clamping keys are each provided with a clamping groove, and the clamping grooves of the two clamping keys define a locking hole used for fixing a bolt head. According to the bolt, the contact area between the bolt and the hexagonal head is effectively increased through the clamping key, so that the problem of slipping is avoided, the hexagonal head of the bolt can be prevented from being damaged, the rejection rate of parts is effectively reduced, and good practicability is achieved.

Description

Technical Field

[0001] The present application relates to the field of hand tools, and in particular to a special wrench for removing nuts. Background Art

[0002] In the field of aviation hydraulics, we often encounter many enterprise-standard tapered bolts, which are mainly used for sealing in hydraulic accessories and pipelines. Therefore, during the assembly process, glue required by relevant regulations is applied and the tightening torque is slightly larger to achieve thread sealing effect. Generally, after the installation is completed and the sealing test is completed, the tapered bolts are not disassembled, but they may need to be disassembled during overhaul or troubleshooting.

[0003] In the related art, when removing a bolt, an ordinary open-end wrench only contacts two surfaces of the bolt, and there are only two stress-bearing surfaces during the removal process, which can easily cause the wrench to slip and also easily damage the six sides of the bolt; an ordinary box wrench or socket is directly put on the bolt head, and the area near the six sides of the bolt head is removed using the inner threads of the wrench. Although the force is evenly distributed, the force-bearing area is small, and the six sides of the bolt are also easily damaged during the removal process. Summary of the invention

[0004] In view of the above problems, the inventor has designed and made a special tool mainly for this aviation hydraulic sealing joint and similar hexagonal heads that are difficult to disassemble. The present application provides a special wrench for disassembling bolts.

[0005] The present application provides a special wrench for removing bolts, which adopts the following technical solution:

[0006] A special wrench for removing bolts comprises a wrench body, a key and a fastener. A mounting hole for installing the key is provided at one end of the wrench body. Two keys are provided. The fastener is used to fix the two keys in the mounting hole. A slot is provided on each side of the two keys close to each other. The slots of the two keys are combined to form a locking hole for fixing the bolt head.

[0007] Optionally, the fastener includes two fixing screws, the ends of the fixing screws are provided with threaded sections, and one end of the threaded section of the fixing screw passes through two keys in sequence and is threadedly connected to the side wall of the mounting hole.

[0008] Optionally, a gap is reserved between the key and the mounting hole for the key to slide, and the fastener also includes a locking bolt for tightening the key.

[0009] Optionally, the width of the gap is 2-5 mm, the locking bolt is threadedly connected to the wrench body, and one end of the screw rod of the locking bolt extends into the mounting hole and is tightened against a key.

[0010] Optionally, both sides of the handle of the wrench body are chamfered.

[0011] Optionally, the wrench body is provided with a right-angled groove at the connection position of the fixing screw, and the screw head of the fixing screw is located in the right-angled groove.

[0012] In summary, the present application includes at least one of the following beneficial technical effects:

[0013] 1. The special wrench of the present application is provided with a detachable clamping key, and a locking hole for fixing the bolt head is formed between the two clamping keys. When removing the hexagonal head sealing bolt, the bolt head is fixed in the locking hole, and then the wrench body is rotated for removal. The clamping key effectively increases the contact area with the hexagonal head, thereby avoiding the problem of slipping, and also preventing the hexagonal head of the bolt from being damaged, effectively reducing the scrap rate of parts;

[0014] 2. The present application realizes a detachable connection between the key and the wrench body through a fastener. In actual work, keys of different sizes can be replaced according to different bolt models, so that the locking hole formed by the key matches the size of the corresponding bolt head, thereby improving the applicability of the wrench.

[0015] 3. A gap is reserved between the key and the mounting hole in the present application for the key to slide. By setting the gap, before removing the bolt, the key is slid to increase the size of the locking hole, so that the locking hole can be easily put on the bolt head. Then the key and the bolt head are tightened with the locking bolt, and then the disassembly can be carried out. By setting a movable key, the locking hole can be easily put on the bolt head, thereby effectively improving the practicability of the wrench during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a special wrench for removing bolts according to an embodiment of the present application.

[0017] Explanation of the reference numerals: 1. wrench body; 11. mounting hole; 12. chamfer; 13. right-angle groove; 2. key; 21. locking hole; 3. fastener; 31. fixing screw; 32. locking bolt. DETAILED DESCRIPTION

[0018] The present application is further described in detail below in conjunction with the accompanying drawings.

[0019] The embodiment of the present application discloses a special wrench for removing bolts. Figure 1 A special wrench for removing bolts includes a wrench body 1, a key 2 and a fastener 3.

[0020] Reference Figure 1One end of the wrench body 1 is provided with a mounting hole 11 for mounting the key 2. In this embodiment, the mounting hole 11 is a square hole. In other embodiments, the mounting hole 11 can also be set as a polygonal hole, a round hole or an elliptical hole. Both sides of the handle of the wrench body 1 are provided with chamfers 12, and the chamfers 12 are provided to improve the comfort of holding the wrench.

[0021] Reference Figure 1 There are two clamping keys 2, and the sides of the clamping keys 2 close to each other are respectively provided with clamping grooves. The clamping grooves of the two clamping keys 2 are combined to form a locking hole 21 for fixing the bolt head. In this embodiment, the locking hole 21 formed by the two clamping keys 2 is a hexagonal hole. In other embodiments, the locking hole 21 can also be a pentagonal hole, a square hole or an octagonal hole.

[0022] Reference Figure 1 The fastener 3 includes two fixing screws 31 and a locking bolt 32. The ends of the fixing screws 31 are provided with threaded sections. One end of the threaded section of the fixing screw 31 passes through the two clamping keys 2 in sequence and is threadedly connected to the side wall of the mounting hole 11. The wrench body 1 is provided with a right-angled groove 13 at the connection of the fixing screws 31, and the screw head of the fixing screw 31 is located in the right-angled groove 13.

[0023] Reference Figure 1 A gap is reserved between the key 2 and the mounting hole 11 for the key 2 to slide, and the width of the gap is 2-5 mm, so that the key 2 can slide along the length direction of the fixing screw 31. The locking bolt 32 is threadedly connected to the wrench body 1, and one end of the screw of the locking bolt 32 extends into the mounting hole 11 and is pressed against the key 2.

[0024] The implementation principle of a special wrench for removing bolts in the embodiment of the present application is as follows: before removing the bolt, first loosen the locking bolt 32 so that the left-side latch key 2 can slide along the fixing screw 31, thereby expanding the locking hole 21, and then put the locking hole 21 on the bolt head, and then rotate the locking bolt 32 so that the end of the locking bolt 32 drives the left-side latch key 2 to slide to clamp the bolt head, and then rotate the handle of the wrench body 1 to remove the bolt.

[0025] In actual work, the keys 2 of different slot sizes can be replaced according to different bolt models. When replacing the keys 2, the two fixing screws 31 are removed from the wrench body 1, and then the remaining keys 2 in the corresponding slots are installed in the mounting hole 11, and then one end of the fixing screw 31 is passed through the two keys 2 in turn and threadedly connected with the side wall of the mounting hole 11.

[0026] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A special wrench for removing bolts, characterized in that: The invention comprises a wrench body (1), a clamping key (2) and a fastener (3); one end of the wrench body (1) is provided with a mounting hole (11) for mounting the clamping key (2); two clamping keys (2) are provided; the fastener (3) is used to fix the two clamping keys (2) in the mounting hole (11); a clamping groove is respectively provided on one side of the two clamping keys (2) close to each other; the clamping grooves of the two clamping keys (2) are combined to form a locking hole (21) for fixing a bolt head.

2. A special wrench for removing bolts according to claim 1, characterized in that: The fastener (3) comprises two fixing screws (31), the ends of the fixing screws (31) are provided with threaded sections, and one end of the threaded section of the fixing screw passes through two latches (2) in sequence and is threadedly connected to the side wall of the mounting hole (11).

3. A special wrench for removing bolts according to claim 2, characterized in that: A gap is reserved between the latch key (2) and the mounting hole (11) for the latch key (2) to slide, and the fastener (3) further comprises a locking bolt (32) for tightening the latch key (2).

4. A special wrench for removing bolts according to claim 3, characterized in that: The width of the gap is 2-5 mm. The locking bolt (32) is threadedly connected to the wrench body (1). One end of the screw of the locking bolt (32) extends into the mounting hole (11) and is tightly pressed against the key (2).

5. A special wrench for removing bolts according to claim 1, characterized in that: Chamfers (12) are provided on both sides of the handle of the wrench body (1).

6. A special wrench for removing bolts according to claim 2, characterized in that: The wrench body (1) is provided with a right-angled recessed groove (13) at the connection position of the fixing screw (31), and the screw head of the fixing screw (31) is located in the right-angled recessed groove (13).

Images