Torque wrench convenient to assemble

Abstract

A torque wrench convenient to assemble comprises a shell, a sleeve is arranged in the shell, an inner hexagonal hole is machined in the middle of the sleeve, a swing arm is arranged on the outer side of the sleeve, a ratchet block is installed in the swing arm, ratchets matched with the ratchet block are machined on the outer side of the sleeve, an air cylinder is installed at the upper end of the shell, and a piston is arranged in the air cylinder. The end of the piston is connected with the swing arm through the power block, a square head is machined at the end of the piston, a square hole is machined in the tail of the power block, the square head is sleeved with the power block through the square hole, a connecting screw is arranged at the tail of the power block and penetrates through the square head, an arc-shaped groove is machined in the front end of the power block, and a spherical connector is machined at the upper end of the swing arm. And the spherical connector is clamped in the arc-shaped groove. Compared with the prior art, according to the torque wrench convenient to assemble, the power block is connected with the piston and the swing arm through the screw and the arc-shaped groove respectively, mounting and dismounting are convenient, meanwhile, the air cylinder and the shell are rapidly connected, and dismounting and assembling are convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of stretchers, and particularly relates to a torque wrench convenient to assemble. BACKGROUND

[0002] The torque wrench is used for the installation of fasteners, and a sleeve is generally arranged on the torque wrench, the outer side of the sleeve is provided with a ratchet block and a swing arm, and a power device is further arranged on the torque wrench, the swing arm is pushed by the power device to drive the sleeve to rotate, the power device generally adopts a pneumatic cylinder or an oil cylinder, and the piston end of the pneumatic cylinder or the oil cylinder is connected with the swing arm through a power block, since the power block is a transmission component, the power block will be abraded after being used for a period of time, and the wrench will produce abnormal noise, therefore, the power block needs to be replaced, and the power block is connected with the piston and the swing arm through a pin shaft, and the pin shaft is assembled in a tight fit mode, so that the wrench is inconvenient to disassemble and assemble and time and effort are consumed. CONTENT

[0003] The utility model solves the technical problem in the prior art.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme:

[0005] A torque wrench convenient to assemble, comprising a shell, a sleeve arranged in the shell, an inner hexagonal hole processed in the middle of the sleeve, a swing arm arranged on the outer side of the sleeve, a ratchet block mounted on the swing arm, ratchet teeth processed on the outer side of the sleeve and matched with the ratchet block, a pneumatic cylinder mounted on the upper end of the shell, a piston arranged in the pneumatic cylinder, the end of the piston connected with the swing arm through a power block, a square head processed on the end of the piston, a square hole processed on the tail of the power block, the power block sleeved on the square head through the square hole, a connecting screw arranged on the tail of the power block, the connecting screw passing through the square head, a circular arc slot processed on the front end of the power block, a spherical connector processed on the upper end of the swing arm, and the spherical connector clamped in the circular arc slot.

[0006] Further, the pneumatic cylinder comprises a cylinder body, a piston hole processed in the cylinder body, and the piston arranged in the piston hole, a piston ring arranged between the periphery of the piston and the cylinder body, a cover plate connected with the tail of the cylinder body, a first air inlet hole processed on the cover plate and facing the tail of the piston, a second air inlet hole processed on the upper end of the cylinder body and obliquely arranged and leading to the front end of the piston.

[0007] Further, a cushion block arranged in the shell, a first step processed on the cushion block, a second step processed on the side surface of the cylinder body, and the first step and the second step engaged with each other.

[0008] Further, the cylinder is arranged in the shell, a fixing pin is arranged between the cylinder and the shell, a positioning groove is formed on the side of the fixing pin, a positioning pin and a clamping screw are connected to the side of the cylinder, a positioning pin spring is arranged between the fixing pin and the clamping screw, and the elastic force of the positioning pin spring enables the positioning pin to be clamped into the positioning groove.

[0009] Further, the shell is provided with a stopper for protecting the fixing pin mounting position.

[0010] Further, the swing arm is provided with a ratchet block groove, a ratchet block is arranged in the ratchet block groove, and a ratchet block spring is arranged between the ratchet block and the ratchet block groove.

[0011] Compared with the prior art, the torque wrench convenient to assemble has the advantages that the power block is connected with the piston and the swing arm through the screw and the circular arc groove respectively, the installation and dismounting are convenient, the cylinder and the shell are quickly connected, and the dismounting and assembling are convenient. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a structural schematic view of the utility model;

[0013] Among them, 1, the shell, 2, the sleeve, 3, the internal hexagonal hole, 4, the swing arm, 5, the ratchet block, 6, the ratchet block spring, 7, the cylinder, 8, the piston, 9, the piston ring, 10, the cover plate, 11, the first air inlet, 12, the second air inlet, 13, the power block, 14, the square head, 15, the spring, 15, the connecting screw, 16, the circular arc groove, 17, the spherical connector, 18, the cushion block, 19, the first step, 20, the second step, 21, the fixing pin, 22, the positioning pin, 23, the clamping screw, 24, the positioning pin spring, 25, the stopper. DETAILED DESCRIPTION

[0014] The technical scheme in the utility model embodiment will be clearly and completely described below.

[0015] As Figure 1As shown, a kind of torque wrench for easy assembly, including shell 1, sleeve 2 is arranged in shell 1, internal hex hole 3 is processed in sleeve 2, swing arm 4 is arranged on the outside of sleeve 2, ratchet block groove is processed on swing arm 4, ratchet block 5 is installed in ratchet block groove, ratchet block spring 6 is arranged between ratchet block 5 and ratchet block groove, the outside of sleeve 2 is processed with ratchet, and the tooth on the tooth of ratchet block 5 is matched, the upper end of shell 1 is installed with cylinder, and the cylinder includes cylinder body 7, piston hole is processed in cylinder body 7, piston 8 is arranged in piston hole, and piston ring 9 is arranged between the periphery of piston 8 and cylinder body 7, the tail of cylinder body 7 is connected with cover plate 10, first air inlet hole 11 is processed on cover plate 10 and faces the tail of piston 8, second air inlet hole 12 is processed on the upper end of cylinder body 7, and second air inlet hole 12 is obliquely arranged and leads to the front end of piston 8, and first air inlet hole 11 and second air inlet hole 12 are in turn air inlet to make piston reciprocate, the end of piston 8 is installed with power block 13, power block 13 is connected with swing arm 4, in the embodiment, square head 14 is processed on the end of piston 8, square hole is processed on the tail of power block 13, power block 13 is sleeved on square head 14 through square hole, connecting screw 15 is arranged on the tail of power block 13, connecting screw 15 passes through square head 14 and is locked to make power block 13 fixed on the end of piston, arc-shaped groove 16 is processed on the front end of power block 13, spherical connector 17 is processed on the upper end of swing arm 4, and spherical connector 17 is clamped in arc-shaped groove 16.

[0016] The shell 1 is provided with a cushion block 18, and the cushion block 18 is fixed on the shell 1. The power block 13 slides below the cushion block 18. A step one 19 is processed on the cushion block. A step two 20 is processed on the side surface of the cylinder body 7. When the cylinder and the shell 1 are assembled, the step one 19 and the step two 20 are engaged with each other.

[0017] A boss is arranged on the side surface of the cylinder body 7. A fixing pin 21 is arranged between the boss and the shell. A positioning groove is processed on the side surface of the fixing pin 21. A positioning pin 22 and a clamping screw 23 are connected to the side surface of the cylinder body 7. A positioning pin spring 24 is arranged between the fixing pin 22 and the clamping screw 23. The elastic force of the positioning pin spring 24 makes the positioning pin 22 clamped into the positioning groove, thereby fixing the cylinder body 7. Meanwhile, a stop block 25 is arranged on one side of the shell 1 to protect the installation position of the fixing pin 21.

[0018] The utility model is not limited to the embodiment, and those skilled in the art can still make some corrections or changes without departing from the spirit of the utility model, i.e. the scope of the disclosure, so the protection scope of the utility model is limited to the range defined in the claims.

Claims

1. A torque wrench that is easy to assemble, comprising a housing, a sleeve disposed within the housing, the sleeve having an internal hexagonal hole machined in the center, a rocker arm disposed on the outer side of the sleeve, a ratchet block mounted on the rocker arm, ratchet teeth machined on the outer side of the sleeve to engage with the ratchet block, a cylinder mounted on the upper end of the housing, a piston disposed within the cylinder, the end of the piston being connected to the rocker arm via a power block, characterized in that: The end of the piston is processed with a square head, the tail of the power block is processed with a square hole, the power block is sleeved on the square head through the square hole, the tail of the power block is provided with a connecting screw, the connecting screw passes through the square head, the front end of the power block is processed with an arc-shaped groove, the upper end of the swing arm is processed with a spherical connector, and the spherical connector is clamped in the arc-shaped groove.

2. A torque wrench for facilitating assembly as claimed in claim 1, wherein: The cylinder includes a cylinder body, a piston hole is processed in the cylinder body, a piston is arranged in the piston hole, a piston ring is arranged between the periphery of the piston and the cylinder body, a cover plate is connected to the tail of the cylinder body, a first air inlet hole is processed on the cover plate and faces the tail of the piston, a second air inlet hole is processed on the upper end of the cylinder body and is obliquely arranged and opens to the front end of the piston.

3. A torque wrench for facilitating assembly as claimed in claim 2, wherein: A cushion block is arranged in the shell, a first step is processed on the cushion block, a second step is processed on the side surface of the cylinder body, and the first step and the second step are engaged with each other.

4. A torque wrench for facilitating assembly as claimed in claim 2, wherein: The cylinder is arranged in the shell, a fixing pin is arranged between the cylinder and the shell, a positioning groove is processed on the side surface of the fixing pin, a positioning pin and a clamping screw are connected to the side surface of the cylinder, a positioning pin spring is arranged between the fixing pin and the clamping screw, and the elastic force of the positioning pin spring enables the positioning pin to be clamped into the positioning groove.

5. A torque wrench for facilitating assembly as defined in claim 2, wherein: A stopper is mounted on one side of the shell to protect the mounting position of the fixing pin.

6. A torque wrench for facilitating assembly as defined in claim 1, wherein: A ratchet block groove is processed on the swing arm, a ratchet block is arranged in the ratchet block groove, and a ratchet block spring is arranged between the ratchet block and the ratchet block groove.

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