Pneumatic wrench

Abstract

The utility model discloses a pneumatic wrench and relates to the technical field of pneumatic tools, in order to solve the problem that an existing pneumatic wrench is tedious and heavy, the pneumatic wrench comprises a rear shell, a front shell and a rotary knob, specifically, the rear shell comprises a rear cover plate and a handle, and the rear cover plate and the handle are integrated into an integrated structure, so that the whole tool is simple in assembly and convenient to use. The front shell is detachably arranged at the front end of the rear shell and connected with the rear shell, the rotary knob is detachably arranged at the rear end of the rear shell and rotationally connected with the rear shell, and the front end of the rotary knob abuts against the end cover, when the wrench is assembled, the rotary knob is installed on the rear shell firstly, then the end cover abuts against the front end of the rotary knob, and then the motor is installed to press the end cover and the rotary knob tightly; and finally, the front shell is installed, the front shell is locked from the rear end to the front end of the rear shell through a bolt, the rear shell is arranged to be of an integrated structure of the rear cover plate and the handle, and compared with a tool with the same torque output, the weight is lighter, and torque output is more stable.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic tools, and more specifically, to a pneumatic wrench. Background Art

[0002] Pneumatic transmission is the evolution and development of pneumatic technology and hydraulic technology. Pneumatic transmission uses compressed air as the working medium to transmit motion and power. Since the power transmission medium of pneumatic transmission is inexhaustible air, it has little pollution, so it has broad development prospects in the field of automation. Pneumatic transmission is widely used in textile, machinery, automobile, electronics, military, steel, chemical, food, packaging and other industries. With the development of atomic energy, space technology, computer technology, etc., pneumatic transmission technology will be more widely used in various industrial fields.

[0003] Pneumatic wrenches are based on the principle of pneumatic transmission and are widely used in many industries, such as auto repair, heavy equipment maintenance, product assembly, major construction projects, installation of wire screw inserts, and anywhere else where high torque output is required. The existing design is a three-section design, with the front section, rear shell and rear cover connected by screws, which is cumbersome and bulky. In addition, due to the split design structure of the rear shell, the air duct will divide the airflow into two paths, and the air volume will flow into the intake.

[0004] Therefore, how to solve the problem that the existing pneumatic wrenches are relatively complicated and bulky is a problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a pneumatic wrench, in which the rear shell is configured as an integrated structure of a rear cover plate and a handle, which is lighter and has a more stable torque output than tools with the same torque output.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A pneumatic wrench, comprising:

[0008] The rear shell is a rear cover plate and a handle, and the two are integrated into one;

[0009] A front shell is detachably arranged at the front end of the rear shell, and the front shell is connected to the rear shell;

[0010] The knob is detachably arranged at the rear end of the rear shell, the knob is rotatably connected to the rear shell, and the front end of the knob abuts against the end cover.

[0011] Preferably, an aluminum cover plate for sealing is provided on the inner periphery of the rear shell, and the rear shell is injection molded on the outer periphery of the aluminum cover plate.

[0012] Preferably, the knob is provided with a groove extending along its axial direction, and a positioning assembly is provided in the groove.

[0013] Preferably, three grooves are provided, and the three grooves are evenly arranged in the circumference of the knob.

[0014] Preferably, the positioning assembly includes a spring and a top ball, the spring abuts against the groove, and the top ball is arranged at the end of the spring and abuts against the aluminum cover plate.

[0015] Preferably, the front end of the aluminum cover plate abuts against the end cover, and the end surface of the aluminum cover plate abutting against the top bead is provided with three positioning grooves, and the three positioning grooves are arranged in one-to-one correspondence with the top bead.

[0016] Preferably, an annular groove is provided on the outer periphery of the knob, and the annular groove is used to install an O-ring that seals the knob and the aluminum cover plate.

[0017] Preferably, the knob is provided with three gears, and the three gears are evenly arranged around the circumference of the knob, and each rotation of the knob by 120 degrees is one gear.

[0018] Preferably, the front end of the end cover abuts against the motor, and the end cover is provided with a mounting groove for radially positioning the motor so that one end of the motor is located in the mounting groove, and the output end of the motor is connected to the striking assembly through a spline, and the striking assembly extends out of the front end of the front shell along the axial direction of the front shell, and the striking assembly is circumferentially provided with a shaft sleeve connected to the front shell so that the striking assembly is rotatably connected to the front shell.

[0019] The pneumatic wrench provided by the utility model comprises a rear shell, a front shell and a knob. Specifically, the rear shell comprises a rear cover plate and a handle, and the two are integrated into an integrated structure to simplify the assembly of the overall tool and improve the assembly accuracy. The front shell is detachably arranged at the front end of the rear shell and connected to the rear shell, the knob is detachably arranged at the rear end of the rear shell and rotatably connected to the rear shell, and the front end of the knob abuts against the end cover. When assembling the wrench, the knob is first installed on the rear shell, and then the end cover is abutted against the front end of the knob, and then the motor is installed to press the end cover and the knob, and finally the front shell is installed and locked from the rear end of the rear shell to the front end by bolts. The rear shell is arranged as an integrated structure of the rear cover plate and the handle. Compared with tools with the same torque output, the weight is lighter and the torque output is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0021] Figure 1 The utility model is a cross-sectional view of the pneumatic wrench provided by the utility model.

[0022] Figure 1 , the reference numerals include:

[0023] 1- Back shell;

[0024] 2- front shell;

[0025] 3- Knob;

[0026] 4-end cap;

[0027] 5-Aluminum cover plate;

[0028] 6-positioning assembly, 61-spring, 62-top ball;

[0029] 7-Strike component. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] It should be noted that the directional words such as "front" and "back" below are defined based on the drawings in the specification.

[0032] The core of the utility model is to provide a pneumatic wrench, in which the rear shell 1 is arranged as an integrated structure of a rear cover plate and a handle, and compared with tools with the same torque output, the weight is lighter and the torque output is more stable.

[0033] Please refer to Figure 1 A pneumatic wrench includes a rear shell 1, a front shell 2 and a knob 3.

[0034] Specifically, the rear shell 1 includes a rear cover plate and a handle, and the two are integrated into an integral structure to simplify the assembly of the overall tool and improve the assembly accuracy. The front shell 2 is detachably arranged at the front end of the rear shell 1 and connected to the rear shell 1. The knob 3 is detachably arranged at the rear end of the rear shell 1 and rotatably connected to the rear shell 1. The front end of the knob 3 abuts against the end cover 4. When assembling the wrench, the knob 3 is first installed on the rear shell 1, and then the end cover 4 abuts against the front end of the knob 3, and then the motor is installed to press the end cover 4 and the knob 3, and finally the front shell 2 is installed, and the front shell 2 is locked from the rear end of the rear shell 1 to the front end by bolts. The rear shell 1 is configured as an integrated structure of the rear cover plate and the handle. Compared with tools with the same torque output, it is lighter and has a more stable torque output.

[0035] In the pneumatic wrench configured in the above manner, the rear shell 1 is configured as an integrated structure of a rear cover plate and a handle, replacing the existing split structure of a separate rear cover plate, thereby reducing the manufacturing cost and the overall weight.

[0036] In the above embodiment, an aluminum cover plate 5 for sealing is provided on the inner periphery of the rear housing 1 , and the rear housing 1 is injection molded on the outer periphery of the aluminum cover plate 5 .

[0037] It should be noted that the aluminum cover plate 5 is an aluminum product. The aluminum cover plate 5 is embedded into the handle during the production process, which ensures the sealing of the product, reduces the process and improves the product precision and quality. The aluminum cover plate 5 has a certain hardness and can provide support for the back shell 1. A through hole for mounting the knob 3 is provided in the center of the aluminum cover plate 5.

[0038] Among them, in this embodiment, the aluminum cover plate 5 is made of aluminum material, but in actual life, there is no limitation on this, as long as the above technical effects can be achieved.

[0039] In the above case, the knob 3 is provided with a groove extending along its axial direction, and a positioning assembly 6 is provided in the groove.

[0040] It is understandable that by adding a positioning assembly 6 to the knob 3, the knob 3 is positioned after being rotated to ensure that the knob 3 does not rotate any further.

[0041] Furthermore, three grooves are provided, and the three grooves are evenly arranged in the circumference of the knob 3 .

[0042] It should be noted that, in the present embodiment, three grooves are provided to correspond to three groups of positioning components 6 , but in actual life, there is no limitation to this as long as the above-mentioned technical effects can be achieved.

[0043] In the above embodiment, the positioning assembly 6 includes a spring 61 and a top ball 62 . The spring 61 abuts against the groove, and the top ball 62 is provided at the end of the spring 61 and abuts against the aluminum cover plate 5 .

[0044] It is understandable that the steel ball and spring 61 structure added to the gear knob 3 can prevent the leakage of compressed air when the tool is working and ensure the output of power torque. In this embodiment, the positioning component 6 is set as a spring 61 and a top ball 62, but in real life, there is no limitation to this as long as the above technical effect can be achieved.

[0045] On the basis of the above embodiment, the front end of the aluminum cover plate 5 abuts against the end cover 4 , and the end surface of the aluminum cover plate 5 abutting against the top bead 62 is provided with three positioning grooves, and the three positioning grooves are arranged in one-to-one correspondence with the top bead 62 .

[0046] It should be noted that the front end of the aluminum cover plate 5 is arranged on the outer periphery of the end cover 4 to achieve radial positioning of the end cover 4. The axial positioning of the end cover 4 is achieved through the aluminum cover plate 5 and the motor, and a gap is left between the knob 3 and the aluminum cover plate 5 so that the knob 3 can rotate smoothly.

[0047] Furthermore, a locking groove is provided on the end surface of the aluminum cover plate 5 where the top beads 62 abut. When the knob 3 is turned from one gear position to the next gear position, the three top beads 62 rotate synchronously along the front end surface of the aluminum cover plate 5. At this time, the top beads 62 have a compression force on the spring 61, so that the spring 61 has a compression elastic force. When the knob 3 is rotated to the next gear position, one end of the top bead 62 is engaged with the locking groove under the action of the restoring force of the spring 61 to fix the position of the knob 3 and prevent the knob 3 from continuing to rotate.

[0048] In this embodiment, there are three slots, but in real life, there is no limitation on this, as long as the above technical effect can be achieved. Also, there is no limitation on the shape and size of the slots.

[0049] In the above embodiment, an annular groove is provided on the outer periphery of the knob 3 , and the annular groove is used to install an O-ring for sealing the knob 3 and the aluminum cover plate 5 .

[0050] It can be understood that a sealing structure is designed at the knob 3 to increase the sealing performance and prevent air leakage of the tool.

[0051] Among them, in this embodiment, two annular grooves are provided on the outer circumference of the knob 3, respectively provided at the front end and the rear end of the knob 3, and the groove on the knob 3 is located between the two annular grooves, but in real life, there is no limitation to this.

[0052] As a preferred embodiment, the knob 3 is provided with three gears, and the three gears are evenly arranged in the circumference of the knob 3, and each rotation of the knob 3 by 120 degrees is one gear.

[0053] It should be noted that there are three gears on the knob 3, which are evenly distributed. When the knob 3 is operated to set the forward and reverse rotation, the spring 61 in the knob 3 uses its elasticity to push the top ball 62 toward the aluminum cover plate 5, so that the knob 3 will be more tightly attached to the end cover 4, thereby achieving the characteristics of sealing and no air leakage.

[0054] Among them, in this embodiment, there are three gears on the knob 3, and each 120 degree rotation of the knob 3 is one gear. However, in actual life, there is no limitation on the gears on the knob 3 and the angle of rotation of the knob 3 corresponding to each gear, as long as the above-mentioned technical effect can be achieved.

[0055] On the basis of the above-mentioned embodiment, the front end of the end cover 4 abuts against the motor, and the end cover 4 is provided with a mounting groove for radially positioning the motor so that one end of the motor is located in the mounting groove, and the output end of the motor is connected to the striking assembly 7 through a spline, and the striking assembly 7 extends out of the front end of the front shell 2 along the axial direction of the front shell 2, and the striking assembly 7 is circumferentially provided with a shaft sleeve connected to the front shell 2 so that the striking assembly 7 is rotatably connected to the front shell 2.

[0056] It can be understood that the output power of the motor can be changed by switching the gear position of the knob 3 to achieve output forces of different frequencies, and the striking component 7 converts the output power of the motor into its own rotation to achieve rotations of different frequencies.

[0057] In summary, the pneumatic wrench provided by the utility model integrates the rear cover plate and the handle into an integrated design, and directly integrates the air passages from two to one, without the "diversion" phenomenon, so that the air is larger and the handle is more powerful; the spring 61 and the top ball 62 are designed on the knob 3 to support the end cover 4 when the knob 3 shifts gears to prevent air leakage, play a sealing role, and ensure the output of power torque; the intake air passage is shorter, reducing the air pressure loss, and is more precise than the traditional handle air path; the integrated design of the rear shell 1 of the pneumatic wrench is lighter and has a more stable torque output than tools with the same torque output.

[0058] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0059] The above is a detailed introduction to a pneumatic wrench provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiment is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A pneumatic wrench, characterized in that: include: A rear shell (1), the rear shell (1) comprising a rear cover plate and a handle, and the two are integrated into one body; A front shell (2) is detachably arranged at the front end of the rear shell (1), and the front shell (2) is connected to the rear shell (1); The knob (3) is detachably arranged at the rear end of the rear shell (1); the knob (3) is rotatably connected to the rear shell (1); and the front end of the knob (3) abuts against the end cover (4).

2. The pneumatic wrench according to claim 1, characterized in that: An aluminum cover plate (5) for sealing is provided on the inner periphery of the rear shell (1), and the rear shell (1) is injection-molded on the outer periphery of the aluminum cover plate (5).

3. The pneumatic wrench according to claim 2, characterized in that: The knob (3) is provided with a groove extending along its axial direction, and a positioning component (6) is provided in the groove.

4. The pneumatic wrench according to claim 3, characterized in that: There are three grooves, and the three grooves are evenly arranged in the circumference of the knob (3).

5. The pneumatic wrench according to claim 4, characterized in that: The positioning assembly (6) comprises a spring (61) and a top ball (62), wherein the spring (61) abuts against the groove, and the top ball (62) is arranged at the end of the spring (61) and abuts against the aluminum cover plate (5).

6. The pneumatic wrench according to claim 5, characterized in that: The front end of the aluminum cover plate (5) abuts against the end cover (4), and the end surface of the aluminum cover plate (5) abutting against the top bead (62) is provided with three positioning grooves, and the three positioning grooves are arranged in one-to-one correspondence with the top bead (62).

7. The pneumatic wrench according to any one of claims 2 to 6, characterized in that: An annular groove is provided on the outer periphery of the knob (3), and the annular groove is used to install an O-ring for sealing the knob (3) and the aluminum cover plate (5).

8. The pneumatic wrench according to claim 7, characterized in that: The knob (3) is provided with three gears, and the three gears are evenly arranged in the circumference of the knob (3), and each rotation of the knob (3) by 120 degrees is one gear.

9. The pneumatic wrench according to claim 8, characterized in that: The front end of the end cover (4) abuts against the motor, and the end cover (4) is provided with a mounting groove for radially positioning the motor so that one end of the motor is located in the mounting groove. The output end of the motor is connected to a striking component (7) via a spline, and the striking component (7) extends out of the front end of the front shell (2) along the axial direction of the front shell (2). The striking component (7) is circumferentially provided with a shaft sleeve connected to the front shell (2) so that the striking component (7) is rotatably connected to the front shell (2).

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