Round nut wrench

Abstract

The utility model provides a round nut wrench which comprises a clamping jaw, one end of the clamping jaw is a thin-wall conical cylinder-shaped conical cylinder section, the other end of the clamping jaw is a cylindrical straight cylinder section, and the conical cylinder top end of the conical cylinder section is integrally and coaxially communicated with the inner end of the straight cylinder section; the outer surface of the clamping jaw is coaxially sleeved with a sleeve, and the conical barrel bottom end of the conical barrel section and the outer end of the straight barrel section both extend out of the end of the sleeve. A through hole is formed in the position, close to the outer end, of the straight barrel section in the radial direction, and a twisting bar is installed in the through hole and located outside the end of the sleeve. The round nut wrench can loosen a round nut which cannot be loosened by hands on mechanical equipment, and compared with a traditional method, the round nut wrench cannot cause vibration of the mechanical equipment and damage of a gear ring, and the round nut can be conveniently screwed and disassembled on the mechanical equipment.

Description

Technical Field

[0001] This utility model belongs to the field of wrenches, specifically relating to a round nut wrench. Background Technology

[0002] Round nuts are a common type of fastener in mechanical equipment. Their inner hole is threaded, while the outer circle is often a small toothed ring. They are usually turned by hand. However, most round nuts on the field cannot be turned by hand and require tools to loosen them. Often, a punch is used to impact the toothed ring tangentially. This can cause vibration in the mechanical equipment and may also damage the toothed ring, causing it to slip. Sometimes, even with continuous impact, the nut cannot be removed. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, this utility model proposes a round nut wrench to solve the technical problem that round nuts on mechanical equipment cannot be loosened in the existing technology.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A circular nut wrench includes a chuck, one end of which is a thin-walled conical section, and the other end of which is a cylindrical straight section. The top of the conical section is coaxially connected to the inner end of the straight section.

[0006] The outer surface of the chuck is coaxially fitted with a sleeve, and the bottom end of the tapered section and the outer end of the straight section both extend to the end of the sleeve; a through hole is radially opened near the outer end of the straight section, and a lever is installed in the through hole, with the lever located outside the end of the sleeve.

[0007] This utility model also has the following technical features:

[0008] The conical section has three contraction joints evenly distributed circumferentially along its axial direction.

[0009] The inner surface near the outer end of the conical section is provided with a fine toothed ring.

[0010] The external thread of the chuck and the internal thread of the sleeve are threaded together.

[0011] The ratio between the inner diameter of the top end of the cone section and the inner diameter of the bottom end of the cone section is 1:10.

[0012] The inner surface of the sleeve that contacts the conical section is set as a conical surface; the outer surface of the sleeve is provided with a rotating surface with a hexagonal cross-section.

[0013] The lever is cylindrical, and a lever head is provided at one end of the lever.

[0014] The chucks are made of spring steel.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects:

[0016] (I) The circular nut wrench proposed in this utility model can loosen circular nuts on mechanical equipment that cannot be loosened by hand. Compared with traditional methods, it will not cause vibration of mechanical equipment or damage to the gear ring. It can easily turn and remove circular nuts on mechanical equipment. Attached Figure Description

[0017] Figure 1 This is a top-view cross-sectional diagram of a round nut wrench.

[0018] Figure 2(a) is a schematic front view cross-section of the chuck.

[0019] Figure 2(b) is a side view of the chuck.

[0020] Figure 3(a) is a schematic front view cross-section of the nut sleeve.

[0021] Figure 3(b) is a side view of the nut sleeve.

[0022] Figure 4 This is a schematic diagram illustrating the application of a round nut wrench.

[0023] The meanings of the labels in the diagram are as follows: 1-round nut wrench, 2-clamp, 3-sleeve, 4-lever, 5-lever head, 6-mechanical equipment, 7-round nut.

[0024] 201-Cone section, 202-Straight section, 203-External thread, 301-Internal thread, 302-Cone surface, 303-Rotating surface.

[0025] 20101-Fine toothed ring, 20102-Shrinkage seam, 20201-Through hole.

[0026] The specific content of this utility model will be further explained in detail below with reference to the embodiments. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, all mechanical equipment and components in this utility model are based on existing mechanical equipment and components.

[0028] Following the above technical solution, the following are specific embodiments of this utility model. It should be noted that this utility model is not limited to the following specific embodiments, and all equivalent modifications made based on the technical solution of this application fall within the protection scope of this utility model.

[0029] Example:

[0030] This embodiment provides a circular nut wrench, such as Figures 1 to 2(b) As shown, the circular nut wrench 1 includes a chuck 2. One end of the chuck 2 is a thin-walled conical section 201, and the other end of the chuck 2 is a cylindrical straight section 202. The top of the conical section 201 is coaxially connected to the inner end of the straight section 202.

[0031] like Figures 1 to 3(b) As shown, a sleeve 3 is coaxially sleeved on the outer surface of the claw 2. The bottom end of the cone section 201 and the outer end of the straight section 202 both extend to the end of the sleeve 3. A through hole 20201 is radially opened near the outer end of the straight section 202. A lever 4 is installed in the through hole 20201. The lever 4 is located outside the end of the sleeve 3.

[0032] like Figures 1 to 2(b) As shown, the conical section 201 has three contraction joints 20102 that are evenly distributed in the circumferential direction along the axial direction.

[0033] like Figures 1 to 2(b) As shown, a fine toothed ring 20101 is provided on the inner surface near the outer end of the conical section 201.

[0034] like Figure 1 As shown in Figures 3(a) and 3(b), the external thread 203 of the chuck 2 and the internal thread 301 of the sleeve 3 are threaded together.

[0035] like Figures 1 to 2(b) As shown, the ratio between the inner diameter of the top end of the cone section 201 and the inner diameter of the bottom end of the cone section is 1:10.

[0036] like Figure 1 As shown in Figures 3(a) and 3(b), the inner surface of the sleeve 3 that contacts the conical section 201 is set as a conical surface 302; the outer surface of the sleeve 3 is provided with a rotating surface 303 with a hexagonal cross section.

[0037] like Figures 1 to 2(b) As shown, the lever 4 is cylindrical, and a lever head 5 is provided at one end of the lever 4.

[0038] In this embodiment, the chuck 2 is made of spring steel and is heat-treated to give it sufficient strength and elasticity.

[0039] Specifically, the fine tooth ring 20101 is used to increase the friction between the round nut 7 and the chuck 2, and the external thread 203 is used to connect with the internal thread 301 in the sleeve 3.

[0040] Specifically, the outer surface of the sleeve 3 is provided with a rotating surface with a hexagonal cross section, which makes it easy to turn the sleeve 3 with a regular wrench.

[0041] Specifically, such as Figure 4 As shown, a round nut 7 on the mechanical device 6 cannot be removed by hand. It is disassembled using the round nut wrench 1 of this embodiment. First, turn the sleeve 3 to the right to open the conical section 201 of the chuck 2. Then, place the conical section 201 of the chuck 2 over the round nut 7. Next, turn the sleeve 3 to the left. The inner conical surface of the sleeve 3 continuously presses against the outer conical surface of the chuck 2, causing the chuck 2 to contract and clamp the round nut 7. Finally, use the lever 4 to rotate the chuck 2 to loosen the round nut 7. Thus, the round nut 7 can be removed.

Claims

1. A round nut wrench, characterized in that, Includes a chuck (2), one end of which is a thin-walled conical section (201), and the other end of which is a cylindrical straight section (202). The top of the conical section (201) is coaxially connected to the inner end of the straight section (202). The outer surface of the claw (2) is coaxially fitted with a sleeve (3). The bottom end of the cone section (201) and the outer end of the straight section (202) both extend to the end of the sleeve (3). A through hole (20201) is radially opened near the outer end of the straight section (202). A lever (4) is installed in the through hole (20201). The lever (4) is located outside the end of the sleeve (3).

2. The circular nut wrench as described in claim 1, characterized in that, The conical section (201) has three contraction joints (20102) evenly distributed in the circumferential direction along the axial direction.

3. The circular nut wrench as described in claim 1, characterized in that, The inner surface of the conical section (201) near its outer end is provided with a fine tooth ring (20101).

4. The circular nut wrench as described in claim 1, characterized in that, The external thread (203) of the chuck (2) and the internal thread (301) of the sleeve (3) are threaded together.

5. The circular nut wrench as described in claim 1, characterized in that, The ratio between the inner diameter of the top end of the cone section (201) and the inner diameter of the bottom end of the cone section is 1:

10.

6. The circular nut wrench as described in claim 1, characterized in that, The inner surface of the sleeve (3) that contacts the conical section (201) is set as a conical surface (302); the outer surface of the sleeve (3) is provided with a rotating surface (303) with a hexagonal cross section.

7. The circular nut wrench as described in claim 1, characterized in that, The lever (4) is cylindrical, and a lever head (5) is provided at one end of the lever (4).

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