Ratchet wrench motor positioning device

Abstract

The utility model relates to the technical field of electric ratchet wrenches, in particular to a ratchet wrench motor positioning device which comprises a front cover, a containing groove for containing a motor is formed in the front cover, and a positioning rear cover plate is arranged between the front cover and the motor; the rear positioning cover plate comprises a cover plate main body, a plurality of positioning lugs are arranged on the cover plate main body in the circumferential direction, clamping grooves for clamping the positioning lugs are formed in the front cover, an inner convex edge is arranged on one side, close to the motor, of at least one positioning lug, and a positioning groove for clamping the inner convex edge is formed in a shell of the motor. The motor positioning method has the effect of motor positioning accuracy.

Description

Technical Field

[0001] This application relates to the technical field of electric ratchet wrenches, and in particular to a ratchet wrench motor positioning device. Background Technology

[0002] A ratchet wrench is a common hand tool primarily used for efficiently tightening or loosening fasteners such as nuts and bolts. Its core design feature is the ratchet mechanism, which allows users to rotate continuously in confined spaces without repeatedly adjusting the tool's position, significantly improving work efficiency.

[0003] An electric ratchet wrench includes a housing, a motor, a ratchet carrier, and a ratchet assembly. The motor is housed within the housing, and its output shaft is connected to the ratchet assembly via a reduction gear. The ratchet assembly is supported on the ratchet carrier. To ensure precise positioning of the motor and adjust its output torque, the inner wall of the housing has protruding inner ridges, and the outer casing of the motor has slots for engaging these inner ridges, thus positioning the motor.

[0004] Regarding the aforementioned technologies, the inventors discovered that the housing is generally made of metal to ensure structural strength, which means it is usually cast. However, to ensure the circumferential positioning accuracy of the motor, the housing needs to be precision machined in a CNC machining center after casting. However, during the machining process, because the inner convex ridge is a protruding structure, it is very easy for it to bend during the cutting process, which leads to a deterioration in the positioning effect. Utility Model Content

[0005] To solve the above-mentioned technical problems, this application provides a ratchet wrench motor positioning device, which has the advantage of ensuring the accuracy of motor positioning.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A ratchet wrench motor positioning device includes a front cover, in which a placement slot for placing a motor is provided, and a positioning rear cover plate is provided between the front cover and the motor.

[0008] The positioning rear cover plate includes a cover plate body, the cover plate body is provided with a plurality of positioning lugs in the circumferential direction, the front cover is provided with a snap-fit ​​groove for the positioning lugs to snap into, at least one of the positioning lugs is provided with an inner protruding ridge on the side near the motor, and the outer shell of the motor is provided with a positioning groove for the inner protruding ridge to snap into.

[0009] To achieve the above technical solution, the motor is first placed in the placement slot within the front cover. Then, the positioning rear cover is fastened onto the front cover, and the protruding positioning lugs engage with the locking slots of the front cover, thus completing the circumferential positioning between the positioning rear cover and the front cover. The inner protruding ridge is then inserted into the positioning slot of the motor housing, allowing the motor to be circumferentially positioned by the inner protruding ridge on the positioning rear cover. This ensures circumferential positioning between the motor and the front cover through the positioning rear cover, preventing the motor itself from rotating and causing inaccurate torque adjustment by the ratchet wrench. Furthermore, the positioning rear cover is injection molded from plastic, ensuring its precision and eliminating the need for precision machining of the protruding positioning lugs and inner protruding ridges, thus avoiding damage and positioning errors.

[0010] As a preferred embodiment of this application, the inner sidewalls of several of the positioning lugs are provided with arc-shaped centering and positioning surfaces that fit against the motor housing.

[0011] To achieve the above technical solution, after the positioning cover is placed on the motor, the outer wall of the motor is abutted between several arc-shaped centering positioning surfaces. This allows the motor to be circumferentially positioned by the inner convex edge of the positioning cover while being axially centered by the arc-shaped centering positioning surfaces, thereby ensuring the accuracy of subsequent motor rotation control.

[0012] As a preferred embodiment of this application, the cover plate body is provided with a plurality of heat dissipation holes.

[0013] The above technical solution enables the heat generated by the motor to be dissipated through the heat dissipation holes, thereby ensuring normal function.

[0014] As a preferred embodiment of this application, a plurality of locking screws for mutual tightening are provided between the positioning rear cover plate and the front cover.

[0015] By implementing the above technical solution, the positioning rear cover is then fixed to the front cover by tightening screws, thereby completing the positioning of the motor.

[0016] As a preferred embodiment of this application, a rear cover is screwed onto the front cover, and a positioning ring platform is provided on the inner wall of the rear cover for positioning the rear cover plate to abut against.

[0017] By implementing the above technical solution, when the rear cover is fixed on the front cover, the positioning ring platform presses and fixes the positioning rear cover onto the motor, thereby ensuring the fixation effect on the motor.

[0018] In summary, this application includes at least one of the following beneficial technical effects:

[0019] 1. First, place the motor in the placement slot within the front cover. Then, fasten the positioning rear cover plate onto the front cover. The protruding positioning lugs engage with the locking slots on the front cover, completing the circumferential positioning between the positioning rear cover plate and the front cover. The inner protrusion inserts into the positioning slot on the motor housing, further securing the motor in circumferential positioning. This ensures circumferential positioning between the motor and the front cover via the positioning rear cover plate, preventing issues such as the motor rotating itself and causing inaccurate torque adjustment with the ratchet wrench. Furthermore, the positioning rear cover plate is injection molded from plastic, ensuring its precision and eliminating the need for precision machining of the protruding positioning lugs and inner protrusion, thus avoiding damage and positioning errors. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0022] Figure 2 This is a schematic diagram of the installation of the positioning back cover plate in an embodiment of this application.

[0023] Figure 3 These are some exploded views of the embodiments in this application.

[0024] Figure 4 This is a cross-sectional view of an embodiment of this application.

[0025] Figure 5 This is a schematic diagram of the internal structure of the rear cover in an embodiment of this application.

[0026] Reference numerals: 1. Front cover; 11. Snap-fit ​​groove; 2. Positioning rear cover plate; 21. Cover plate body; 22. Positioning lug; 23. Inner protruding ridge; 24. Arc-shaped centering positioning surface; 25. Heat dissipation hole; 26. Locking screw; 3. Rear cover; 4. Motor; 41. Positioning groove. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0028] This application discloses a ratchet wrench motor positioning device. (Refer to...) Figure 1-5The ratchet wrench motor positioning device includes a front cover 1, in which a placement slot for the motor 4 is provided, and a positioning rear cover plate 2 is provided between the front cover 1 and the motor 4.

[0029] The positioning rear cover 2 includes a cover body 21. The cover body 21 has several positioning lugs 22 arranged circumferentially. The front cover 1 has a locking groove 11 for engaging the positioning lugs 22. At least one positioning lug 22 has an inner protruding ridge 23 near the motor 4. The outer casing of the motor 4 has a positioning groove 41 for engaging the inner protruding ridge 23. First, the motor 4 is placed in the placement groove in the front cover 1. Then, the positioning rear cover 2 is fastened onto the front cover 1. The protruding positioning lugs 22 engage with the locking groove 11 of the front cover 1, thus completing the circumferential positioning between the positioning rear cover 2 and the front cover 1. The inner protruding ridge 23 is inserted into the positioning groove 41 of the motor 4's outer casing, causing the motor 4 to be engaged and circumferentially positioned by the inner protruding ridge 23 on the positioning rear cover. This ensures that the motor 4 and the front cover 1 are circumferentially positioned through the positioning rear cover 2, preventing the motor 4 from rotating itself and causing inaccurate torque adjustment by the ratchet wrench. Meanwhile, the positioning cover plate 2 is made of plastic injection molding, which ensures the accuracy of the positioning cover plate 2. This eliminates the need for precision machining of the protruding positioning lugs 22 and inner protruding ridges 23, thus preventing damage and positioning errors.

[0030] To further ensure the alignment of the motor 4, the inner wall of the positioning lug 22 is provided with an arc-shaped alignment surface 24 that fits against the outer shell of the motor 4. This allows the outer wall of the motor 4 to be abutted between several arc-shaped alignment surfaces after the positioning cover plate 2 is placed on the motor 4. This ensures that the motor 4 is circumferentially positioned by the inner protrusion 23 of the positioning cover plate 2, while simultaneously being axially aligned by the arc-shaped alignment surfaces, thus guaranteeing the accuracy of subsequent motor 4 rotation control. Several heat dissipation holes 25 are provided on the cover plate body 21 to allow the heat generated by the motor 4 to dissipate through the heat dissipation holes 25, thereby ensuring normal function.

[0031] A plurality of locking screws 26 are provided between the positioning rear cover plate 2 and the front cover 1 for mutual tightening. The positioning rear cover plate 2 is then fixed to the front cover 1 by the locking screws 26, thereby completing the positioning of the motor 4. A rear cover 3 is screwed onto the front cover 1. A positioning ring platform is provided on the inner wall of the rear cover 3 for the positioning rear cover plate 2 to abut against. When the rear cover 3 is fixed to the front cover 1, the positioning ring platform presses the positioning rear cover plate tightly onto the motor 4, thus ensuring the effective fixation of the motor 4.

[0032] The implementation principle of the ratchet wrench motor positioning device in this application embodiment is as follows: First, the motor 4 is placed in the placement slot in the front cover 1. Then, the positioning rear cover 2 is fastened onto the front cover 1, and the protruding positioning lug 22 is engaged with the engaging slot 11 of the front cover 1, thereby completing the circumferential positioning between the positioning rear cover 2 and the front cover 1. The inner protrusion 23 is inserted into the positioning slot 41 of the motor 4 housing, so that the motor 4 is engaged and circumferentially positioned by the inner protrusion 23 on the positioning rear cover. This ensures that the motor 4 and the front cover 1 are circumferentially positioned through the positioning rear cover 2, preventing the motor 4 from rotating itself and causing inaccurate torque adjustment of the ratchet wrench. At the same time, the positioning rear cover 2 is injection molded from plastic, thus ensuring the accuracy of the positioning rear cover 2. This eliminates the need for precision machining of the protruding positioning lug 22 and the inner protrusion 23, preventing damage and positioning errors.

[0033] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A ratchet wrench motor positioning device, characterized in that: Includes a front cover (1), in which a placement slot for a power supply motor (4) is provided, and a positioning rear cover plate (2) is provided between the front cover (1) and the motor (4); The positioning cover plate (2) includes a cover plate body (21), and the cover plate body (21) is provided with a plurality of positioning lugs (22) in the circumferential direction. The front cover (1) is provided with a snap-fit ​​groove (11) for the positioning lugs (22) to snap into. At least one of the positioning lugs (22) is provided with an inner protrusion ridge (23) on the side near the motor (4). The outer shell of the motor (4) is provided with a positioning groove (41) for the inner protrusion ridge (23) to snap into.

2. The ratchet wrench motor positioning device according to claim 1, characterized in that: Several of the positioning lugs (22) have an arc-shaped centering positioning surface (24) that fits into the outer shell of the motor (4) on their inner sidewalls.

3. The ratchet wrench motor positioning device according to claim 1, characterized in that: The cover plate body (21) is provided with several heat dissipation holes (25).

4. The ratchet wrench motor positioning device according to claim 1, characterized in that: A number of locking screws (26) for tightening each other are provided between the positioning rear cover plate (2) and the front cover (1).

5. The ratchet wrench motor positioning device according to claim 1, characterized in that: The front cover (1) is screwed with a rear cover (3), and the inner wall of the rear cover (3) is provided with a positioning ring platform for the positioning rear cover plate (2) to abut against.

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