Novel adjustable labor-saving wrench

Abstract

The utility model discloses a novel adjustable labor-saving wrench, which comprises a shell, a chain, a double-cylinder single-rod hydraulic cylinder, combined gears, a 1 # shaft, a 2 # shaft and a handle, and is characterized in that the shell is internally provided with two combined gears, each combined gear passes through two combined gears which are respectively fixedly connected by the bottoms of eight cylinder bodies and are communicated with each other; the combined hydraulic cylinders are evenly arranged in the shape of a Chinese character'mi ', the semicircular gears are provided with flange edges, the sliding control rod can enable the left end and the right end of the hydraulic rod to slide in the first cylinder and the second cylinder in a reciprocating mode respectively, can rotate with a central column of the hydraulic rod as a shaft and is fixed through a limiting clamping groove, and the hydraulic rod slides in the first cylinder and the second cylinder by moving the sliding control rod. The amount of hydraulic oil in the combined hydraulic cylinder of the two combined gears is adjusted, and the length of a hydraulic rod of the combined hydraulic cylinder is controlled, so that the effective diameter of the two combined gears is changed, the effective torque of the wrench is adjusted, and finally the problem that the effective torque of an existing labor-saving wrench cannot be adjusted is solved.

Description

Technical Field

[0001] The utility model relates to the field of wrenches, in particular to a novel adjustable labor-saving wrench. Background Art

[0002] A wrench is a commonly used installation and disassembly tool. It is a hand tool that uses the principle of leverage to turn bolts, screws, nuts and other threaded fasteners that hold the openings or holes of bolts or nuts. Wrenches are usually made of structural steel made of carbon or alloy materials. Wrenches usually have openings or holes for clamping bolts or nuts at one or both ends of the handle. When in use, external force is applied to the handle along the direction of thread rotation to turn the bolt or nut.

[0003] In the process of using the existing wrench, the effective torque can usually be extended by putting a pipe fitting on the handle to achieve the labor-saving effect, but it is extremely inconvenient in an environment with limited space. Although some wrenches can increase the torque with the assistance of mechanical elements to achieve the purpose of labor saving, the effective torque is relatively fixed and cannot be adjusted at will, which brings inconvenience to use. Therefore, those skilled in the art provide a new adjustable labor-saving wrench to solve the problems raised in the above background technology. Utility Model Content

[0004] The utility model aims to overcome the deficiencies in the prior art and provide a novel adjustable labor-saving spanner, which solves the problem that the effective torque of the current spanner is relatively fixed and cannot be adjusted at will.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A novel adjustable labor-saving wrench comprises a housing (1), a chain (2), a double-cylinder single-rod hydraulic cylinder (3), a combined gear (4), a No. 1 shaft (5), a No. 2 shaft (6), and a handle (7). The characteristic of the invention is that the housing (1) contains two combined gears (4), each of the combined gears (4) is composed of two combined hydraulic cylinders (42) and eight semicircular gears (41) with flange edges, each of which is fixedly connected to the bottom of eight cylinder bodies and interconnected, and is evenly arranged in a "M" shape. The bottoms of all cylinder bodies of the two combined hydraulic cylinders (42) of each combined gear (4) are interconnected through the center of the combined gear (4) and are respectively fixed to the bottoms of the 1# cylinder (31) and the 2# cylinder (34) of the double-cylinder single-rod hydraulic cylinder (3), and the internal hydraulic oil (10) is interconnected. The sliding control rod (33) can make the left and right ends of the hydraulic rod (32) slide back and forth in the 1# cylinder (31) and the 2# cylinder (34) respectively, and can rotate along the center column of the hydraulic rod (32) as the axis. The 1# The shaft (5) passes through one of the combined gears (4) and is fixedly connected to the combined gear (4) without affecting the flow of the internal hydraulic oil (10). One end of the 1# shaft (5) is embedded in one side of the housing (1) and can rotate freely therein, and the other end extends out of the housing (1) and is fixedly connected to one end of the rod body (72) of the handle (7). The 2# shaft (6) passes through another combined gear (4) and is fixedly connected to the combined gear (4) without affecting the flow of the internal hydraulic oil (10). One end of the 2# shaft (6) is embedded in one side of the housing (1) and can rotate freely therein, and the other end extends out of the other side of the housing (1) and can be used in combination with the sleeve (9). The chain (2) and the two combined gears (4) form a chain transmission. During the rotation of the handle (7), the 1# shaft (5) drives one of the combined gears (4) to rotate, and the rotating combined gear (4) drives the other combined gear (4) to rotate through the chain (2), thereby driving the 2# shaft (6) to rotate.

[0007] Preferably, the semicircular gear (41) with a flange is sandwiched between two combined hydraulic cylinders (42) of the combined gear (4), and the two side surfaces of the semicircular gear (41) with a flange are respectively fixedly connected to the front ends of the hydraulic rods corresponding to the two combined hydraulic cylinders (42).

[0008] Preferably, the hand-held portion (71) of the handle (7) is connected to one end of the rod body (72) via a central rod, so that the hand-held portion (71) can rotate around the central rod without falling off.

[0009] Preferably, the No. 2 shaft (6) can be assembled and used with sleeves (9) of different models.

[0010] Preferably, the sliding control rod (33) is fixed in the middle of the hydraulic rod (32), and when the sliding control rod (33) is moved, the two ends of the hydraulic rod (32) can slide in the 1# cylinder (31) and the 2# cylinder (34) respectively, thereby adjusting the amount of hydraulic oil in the hydraulic cylinders (42) of the two combined gears (4), controlling the length of the hydraulic rod of the combined hydraulic cylinder (42), thereby changing the effective diameter of the two combined gears (4), and finally achieving the purpose of freely adjusting the effective torque of the wrench and saving labor.

[0011] Preferably, the sliding control rod (33) can rotate along the central column of the hydraulic rod (32) as an axis and be inserted into the limit slot (8) of the housing (1), thereby preventing the hydraulic rod (32) from sliding during use, causing the hydraulic oil (10) in the double-cylinder single-rod hydraulic cylinder (3) and the two combined gears (4) to flow, resulting in a change in the effective diameter of the two combined gears (4).

[0012] The utility model has a beneficial effect: the utility model enables the two ends of the hydraulic rod (32) to slide in the 1# cylinder (31) and the 2# cylinder (34) respectively through the movement of the sliding control rod (33), thereby adjusting the amount of hydraulic oil in the hydraulic cylinder (42) of the two combined gears (4), controlling the length of the hydraulic rod of the combined hydraulic cylinder (42), thereby changing the effective diameter of the two combined gears (4), and finally realizing the free adjustment of the effective torque of the wrench, thereby achieving the purpose of labor saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the internal structure of the utility model;

[0014] Figure 2 This is a schematic diagram of effective torque adjustment of the utility model;

[0015] Figure 3 This is a schematic diagram of the external structure of the utility model;

[0016] In the figure: 1, housing, 2, chain, 3, double-cylinder single-rod hydraulic cylinder, 4, combined gear, 5, 1# shaft, 6, 2# shaft, 7, handle, 8, limit slot, 9, sleeve, 10, hydraulic oil, 31, 1# cylinder, 32, hydraulic rod, 33, control rod, 34, 2# cylinder, 41, semicircular gear, 42, combined hydraulic cylinder, 71, handheld part, 72, rod body DETAILED DESCRIPTION

[0017] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0018] like Figure 1-3The novel adjustable labor-saving wrench shown in the figure comprises a housing (1), a chain (2), a double-cylinder single-rod hydraulic cylinder (3), a combined gear (4), a 1# shaft (5), a 2# shaft (6), and a handle (7), characterized in that the housing (1) contains two combined gears (4), each of the combined gears (4) is connected to the housing (1) by two combined hydraulic cylinders (42) and 8 semicircular gears (41) with flange edges, which are fixedly connected and interconnected by 8 cylinder bottoms and are evenly arranged in a "M" shape. The bottoms of all cylinder bodies of the two combined hydraulic cylinders (42) of each combined gear (4) are interconnected through the center of the combined gear (4) and are respectively fixed to the bottoms of the 1# cylinder (31) and the 2# cylinder (34) of the double-cylinder single-rod hydraulic cylinder (3), and the internal hydraulic oil (10) is interconnected. The sliding control rod (33) can make the left and right ends of the hydraulic rod (32) slide back and forth in the 1# cylinder (31) and the 2# cylinder (34) respectively, and can rotate along the center column of the hydraulic rod (32) as the axis. The 1# shaft (5) passes through one of the combined gears (4) and is fixedly connected to the combined gear (4) without affecting the flow of the internal hydraulic oil (10). One end of the 1# shaft (5) is embedded in one side of the housing (1) and can rotate freely therein, and the other end extends out of the housing (1) and is fixedly connected to one end of the rod body (72) of the handle (7). The 2# shaft (6) passes through another combined gear (4) and is fixedly connected to the combined gear (4) without affecting the flow of the internal hydraulic oil (10). One end of the 2# shaft (6) is embedded in one side of the housing (1) and can rotate freely therein, and the other end extends out of the other side of the housing (1) and can be used in combination with the sleeve (9). The chain (2) and the two combined gears (4) form a chain transmission. During the rotation of the handle (7), the 1# shaft (5) drives one of the combined gears (4) to rotate, and the rotating combined gear (4) drives the other combined gear (4) to rotate through the chain (2), thereby driving the 2# shaft (6) to rotate.

[0019] Preferably, the semicircular gear (41) with flange is sandwiched between two combined hydraulic cylinders (42) of the combined gear (4), and the two side surfaces of the semicircular gear (41) with flange are respectively fixedly connected to the front ends of the hydraulic rods corresponding to the two combined hydraulic cylinders (42).

[0020] Preferably, the hand-grip portion (71) of the handle (7) is connected to one end of the rod body (72) via a central rod, so that the hand-grip portion (71) can rotate around the central rod without falling off.

[0021] Preferably, the No. 2 shaft (6) can be assembled and used with sleeves (9) of different models.

[0022] Preferably, the sliding control rod (33) is fixed in the middle of the hydraulic rod (32), and when the sliding control rod (33) is moved, the two ends of the hydraulic rod (32) can slide in the 1# cylinder (31) and the 2# cylinder (34) respectively, thereby adjusting the amount of hydraulic oil in the hydraulic cylinder (42) that combines the two combined gears (4), controlling the length of the hydraulic rod of the combined hydraulic cylinder (42), thereby changing the effective diameter of the two combined gears (4), and finally achieving the purpose of freely adjusting the effective torque of the wrench and saving labor.

[0023] Preferably, the sliding control rod (33) can rotate along the central column of the hydraulic rod (32) as an axis and be inserted into the limit slot (8) of the housing (1), thereby preventing the hydraulic rod (32) from sliding during use, causing the hydraulic oil (10) in the double-cylinder single-rod hydraulic cylinder (3) and the two combined gears (4) to flow, resulting in a change in the effective diameter of the two combined gears (4).

[0024] The utility model is implemented in such a way that before the hand-held portion (71) of the handle (7) is turned and the bolts are removed by using the wrench, the control rod (33) is slid so that the two ends of the hydraulic rod (32) slide in the No. 1 cylinder (31) and the No. 2 cylinder (34) respectively, thereby adjusting the amount of hydraulic oil in the hydraulic cylinder (42) of the two combined gears (4), controlling the length of the hydraulic rod of the combined hydraulic cylinder (42), thereby changing the effective diameter of the two combined gears (4), and finally realizing the free adjustment of the effective torque of the wrench, thereby achieving the purpose of labor saving.

[0025] The above-mentioned implementation mode is an illustration of the present utility model, not a limitation of the present utility model. It can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The protection scope of the present utility model is limited by the attached claims and their equivalents.

Claims

1. A novel adjustable labor-saving wrench, comprising a housing (1), a chain (2), a double-cylinder single-rod hydraulic cylinder (3), a combined gear (4), a No. 1 shaft (5), a No. 2 shaft (6), a handle (7), and a sliding control rod (33), characterized in that: Two combined gears (4) are arranged in the housing (1). Each of the combined gears (4) is composed of two combined hydraulic cylinders (42) and eight semicircular gears (41) with flange edges, each of which is fixedly connected and interconnected with eight cylinder bottoms, arranged evenly in a "M" shape. All cylinder bottoms of the two combined hydraulic cylinders (42) of each combined gear (4) are interconnected through the center of the combined gear (4), and are respectively fixed to the bottoms of the 1# cylinder (31) and the 2# cylinder (34) of the double-cylinder single-rod hydraulic cylinder (3), and the internal hydraulic oil (10) is interconnected; The sliding control rod (33) can make the left and right ends of the hydraulic rod (32) slide back and forth in the No. 1 cylinder (31) and the No. 2 cylinder (34) respectively, and can rotate along the center column of the hydraulic rod (32) as an axis; The 1# shaft (5) passes through one of the combined gears (4) and is fixedly connected to the combined gear (4) without affecting the flow of the internal hydraulic oil (10); one end of the 1# shaft (5) is embedded in one side of the housing (1) and can rotate freely therein, and the other end extends out of the housing (1) and is fixedly connected to one end of the rod body (72) of the handle (7); The second shaft (6) passes through another combined gear (4) and is fixedly connected to the combined gear (4) without affecting the flow of the internal hydraulic oil (10). One end of the second shaft (6) is embedded in one side of the housing (1) and can rotate freely therein, and the other end extends out of the other side of the housing (1) and can be used in combination with the sleeve (9); The chain (2) and the two combined gears (4) form a chain transmission. When the handle (7) rotates, the No. 1 shaft (5) drives one of the combined gears (4) to rotate. The rotating combined gear (4) drives the other combined gear (4) to rotate through the chain (2), thereby driving the No. 2 shaft (6) to rotate.

2. A novel adjustable labor-saving wrench according to claim 1, characterized in that: The semicircular gear (41) with flange is sandwiched between two combined hydraulic cylinders (42) of the combined gear (4), and the two side surfaces of the semicircular gear (41) with flange are respectively fixedly connected to the front ends of the hydraulic rods corresponding to the two combined hydraulic cylinders (42).

3. A novel adjustable labor-saving wrench according to claim 1, characterized in that: The hand-held portion (71) of the handle (7) is connected to one end of the rod body (72) via a central rod, so that the hand-held portion (71) can rotate around the central rod without falling off.

4. A novel adjustable labor-saving wrench according to claim 1, characterized in that: The No. 2 shaft (6) can be assembled and used with sleeves (9) of different models.

5. The novel adjustable labor-saving wrench according to claim 1 is characterized in that: The sliding control rod (33) is fixed in the middle of the hydraulic rod (32). When the sliding control rod (33) is moved, the two ends of the hydraulic rod (32) can slide in the No. 1 cylinder (31) and the No. 2 cylinder (34) respectively, thereby adjusting the amount of hydraulic oil in the hydraulic cylinders (42) of the two combined gears (4), controlling the length of the hydraulic rod of the combined hydraulic cylinder (42), thereby changing the effective diameter of the two combined gears (4), and finally realizing the free adjustment of the effective torque of the wrench, thereby achieving the purpose of labor saving.

6. A novel adjustable labor-saving wrench according to claim 5, characterized in that: The sliding control rod (33) can rotate along the central column of the hydraulic rod (32) as an axis and be inserted into the limit slot (8) of the housing (1), thereby preventing the hydraulic rod (32) from sliding during the use of the wrench, causing the hydraulic oil (10) in the double-cylinder single-rod hydraulic cylinder (3) and the two combined gears (4) to flow, resulting in a change in the effective diameter of the two combined gears (4).

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