An adjustable ratchet torque wrench applicable to screwdrivers of different models

Abstract

The present invention belongs to the technical field of medical devices, and specifically relates to an adjustable ratchet torque wrench suitable for different types of screwdrivers. It includes a wrench head and a handle, and the wrench head includes a fixed shell. The fixed shell is provided with a front cavity, a middle cavity and a rear cavity that are connected in sequence. A torque output gear is rotatably installed in the front cavity, and an adjusting ball is rotatably installed at the center of the torque output gear. A plurality of screwdriver fixing holes are provided on the outer surface of the adjusting ball for installing different types of screwdrivers. A tightening bolt is provided through the top of the fixed shell. In the present invention, an adjusting ball is rotatably installed at the center of the torque output gear, and a plurality of screwdriver fixing holes are provided on the outer surface of the adjusting ball for installing different types of screwdrivers. By rotating the adjusting ball, the appropriate screwdriver fixing hole can be adjusted to the working position and fixed with a tightening bolt for installing the same type of screwdriver, which not only avoids the trouble caused by frequent replacement of wrenches, but also reduces costs.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to an adjustable ratchet torque wrench suitable for screwdrivers of different models. Background Art

[0002] A ratchet torque wrench is a manual screw tightening tool primarily used to turn bolts or nuts in narrow or difficult-to-access locations. Users can continuously tighten the screw by turning the wrench back and forth, eliminating the need to tighten the screw once, withdraw it, and then return it to its original position. Ratchet wrenches are often used in oral implantology and restorations due to limitations on the patient's mouth opening. However, because different implant and restoration systems from different companies use screwdrivers with varying shapes and calibers, clinicians often need to find different wrenches to match them. Consequently, they need to be equipped with a variety of wrenches, significantly increasing costs and complexity. Summary of the Invention

[0003] In response to the above problems in the prior art, the present invention provides an adjustable ratchet torque wrench suitable for different types of screwdrivers, and specifically discloses the following technical solutions:

[0004] The cam is secured to the drive shaft and has a locking mechanism which allows the cam to move relative to the drive shaft and lock the drive shaft to actuate the engagement of the cam with the engagement member when the cam is engaged.

[0005] Furthermore, the upper and lower end surfaces of the torque output gear are both provided with first through holes for exposing the screwdriver fixing hole on the adjusting ball, and the upper and lower end surfaces of the fixed shell are both provided with second through holes for exposing the end surface of the torque output gear.

[0006] Furthermore, the fixed shell includes an upper shell and a lower shell, and the upper shell and the lower shell are fastened together by screws.

[0007] Furthermore, the handle includes a handle shell, a torque transmission mechanism is provided inside the end of the handle shell close to the handle head, and a torque adjustment control mechanism is provided inside the other end of the handle shell. One end of the torque transmission mechanism is rotatably connected to the end of the wrench head inserted into the handle shell, and a first pin is provided on the fixed shell of the wrench head. The wrench head is rotatably connected to the handle shell through the first pin, and a claw is rotatably installed on the other end of the torque transmission mechanism, and the torque transmission mechanism conflicts with the torque adjustment control mechanism through the claw.

[0008] Furthermore, the torque transmission mechanism includes a first transmission rod and a second transmission rod, one end of the first transmission rod is rotatably connected to the handle head, and the side surface of the other end contacts the side surface of one end of the second transmission rod, the claw is rotatably installed on the end of the second transmission rod away from the first transmission rod, a second pin shaft is provided in the middle of the first transmission rod, and a third pin shaft is provided in the middle of the second transmission rod, the first transmission rod is rotatably connected to the handle housing through the second pin shaft, and the second transmission rod is rotatably connected to the handle housing through the third pin shaft.

[0009] Furthermore, the ends of the first transmission rod and the second transmission rod that contact each other are both configured as wedge-shaped structures, and the ends of the wedge-shaped structures are both configured as curved surfaces.

[0010] Furthermore, a first spring groove is provided on the side of the second transmission rod, a first return spring is installed in the first spring groove, one end of the first return spring is installed in the first spring groove, and the other end is in conflict with the inner wall of the handle housing, and a second spring groove is provided on the end of the second transmission rod away from the first transmission rod, a second return spring is installed in the second spring groove, one end of the second return spring is installed in the second spring groove, and the other end is fixedly connected to a return ball, and the end of the return ball away from the second return spring is in conflict with the end face of the claw away from the torque adjustment control mechanism.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] In the present invention, an adjusting ball is installed on the center rotation of the torque output gear, and a plurality of screwdriver fixing holes are provided on the outer surface of the adjusting ball for installing screwdrivers of different models. By rotating the adjusting ball, the appropriate screwdriver fixing hole can be adjusted to the working position and fixed with a tightening bolt for installing a screwdriver of the same model, which not only avoids the trouble caused by frequent replacement of wrenches, but also reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0014] Figure 2 It is a cross-sectional view of the present invention.

[0015] 1-Fixed housing, 2-Torque output gear, 3-Adjusting ball, 4-Screwdriver fixing hole, 5-Tightening bolt, 6-Ratchet, 7-Toggle lever, 8-Tightening spring, 9-Positioning ball, 10-First through hole, 11-Second through hole, 12-First pin, 13-First transmission rod, 14-Second transmission rod, 15-Second pin, 16-Third pin, 17-Claw, 18-First return spring, 19-Second return spring, 20-Reset ball, 21-Torque adjustment control mechanism, 22-Handle housing. DETAILED DESCRIPTION

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] Reference Figure 1-2 , an adjustable ratchet torque wrench suitable for different types of screwdrivers, comprising a wrench head and a handle, the wrench head being connected to one end of the handle, the wrench head comprising a fixed shell 1, a front cavity, a middle cavity and a rear cavity being sequentially connected being provided in the fixed shell 1, a torque output gear 2 being rotatably installed in the front cavity, an adjusting ball 3 being rotatably installed at the center of the torque output gear 2, a plurality of screwdriver fixing holes 4 being provided on the outer surface of the adjusting ball 3 for installing screwdrivers of different models, a tightening bolt 5 being provided through the top of the fixed shell 1, the head end of the tightening bolt 5 passing through the torque output gear 2 and conflicting with the adjusting ball 3, the appropriate screwdriver fixing hole 4 can be adjusted to the working position by rotating the adjusting ball 3, and fixed with the tightening bolt 5 for installing the same model The screwdriver not only avoids the trouble caused by frequent replacement of wrenches, but also reduces costs; a ratchet 6 is rotatably installed in the middle cavity, and ratchet teeth are respectively provided at both ends of the ratchet 6 close to the torque output gear 2, and positioning grooves are respectively provided at both ends of the other side of the ratchet 6. A toggle rod 7 is fixedly connected to the end surface of the ratchet 6, and the ratchet teeth at both ends of the ratchet 6 can be selectively engaged with the torque output gear 2 by adjusting the toggle rod 7. A tightening spring 8 is provided in the rear cavity, and one end of the tightening spring 8 close to the ratchet 6 is fixedly connected to a positioning ball 9 that cooperates with the positioning groove, and the other end of the tightening spring 8 is fixedly connected to the inner wall of the rear cavity. The tightening spring 8 cooperates with the positioning ball 9 to realize the tightening and positioning of the ratchet 6, thereby preventing the ratchet 6 from disengaging from the torque output gear 2 during use.

[0018] In this embodiment, the upper and lower end surfaces of the torque output gear 2 are provided with first through holes 10 for exposing the screwdriver fixing hole 4 on the adjusting ball 3, and the upper and lower end surfaces of the fixed housing 1 are provided with second through holes 11 for exposing the end surface of the torque output gear 2. The setting of the first through hole 10 allows the screwdriver fixing hole 4 on the adjusting ball 3 to be exposed from the end surface of the torque output gear 2, and the setting of the second through hole 11 allows the end surface of the torque output gear 2 to be exposed from the fixed housing 1.

[0019] In this embodiment, the fixed housing 1 includes an upper shell and a lower shell, and the upper shell and the lower shell are fastened together by screws, so as to facilitate disassembly and installation.

[0020] In this embodiment, the handle includes a handle shell 22, and a torque transmission mechanism is provided inside the handle shell 22 at one end close to the handle head, and a torque adjustment control mechanism 21 is provided inside the other end of the handle shell 22. One end of the torque transmission mechanism is rotatably connected to the end of the wrench head inserted into the handle shell 22, and a first pin shaft 12 is provided on the fixed shell 1 of the wrench head. The wrench head is rotatably connected to the handle shell 22 through the first pin shaft 12, and a claw 17 is rotatably installed on the other end of the torque transmission mechanism, and the torque transmission mechanism conflicts with the torque adjustment control mechanism 21 through the claw 17.

[0021] In this embodiment, the torque transmission mechanism includes a first transmission rod 13 and a second transmission rod 14, one end of the first transmission rod 13 is rotatably connected to the handle head, and the side surface of the other end contacts the side surface of one end of the second transmission rod 14, and the claw 17 is rotatably installed on the end of the second transmission rod 14 away from the first transmission rod 13. A second pin shaft 15 is provided in the middle of the first transmission rod 13, and a third pin shaft 16 is provided in the middle of the second transmission rod 14. The first transmission rod 13 is rotatably connected to the handle housing 22 through the second pin shaft 15, and the second transmission rod 14 is rotatably connected to the handle housing 22 through the third pin shaft 16.

[0022] In this embodiment, the ends of the first transmission rod 13 and the second transmission rod 14 that contact each other are both configured as wedge-shaped structures, and the ends of the wedge-shaped structures are both configured as curved surfaces.

[0023] In this embodiment, a first spring groove is provided on the side of the second transmission rod 14, and a first return spring 18 is installed in the first spring groove. One end of the first return spring 18 is installed in the first spring groove, and the other end conflicts with the inner wall of the handle housing 22. The first return spring 18 is used to reset the second transmission rod 14. A second spring groove is provided on the end of the second transmission rod 14 away from the first transmission rod 13, and a second return spring 19 is installed in the second spring groove. One end of the second return spring 19 is installed in the second spring groove, and the other end is fixedly connected to a return ball 20. The end of the return ball 20 away from the second return spring 19 conflicts with the end face of the claw 17 away from the torque adjustment control mechanism 21. The second return spring 19 and the return ball 20 are used to reset the claw 17.

[0024] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An adjustable ratchet torque wrench suitable for different types of screwdrivers, characterized in that: The cam is fixedly mounted on the drive shaft of the drive gear and is provided with a toothed connection portion for receiving the toothed connection portion, and the toothed connection portion is fixedly mounted on the drive shaft of the drive gear and is provided with a toothed connection portion for receiving the toothed connection portion.

2. The adjustable ratchet torque wrench suitable for different types of screwdrivers according to claim 1, characterized in that: The upper and lower end surfaces of the torque output gear are both provided with first through holes for exposing the screwdriver fixing hole on the adjusting ball, and the upper and lower end surfaces of the fixed shell are both provided with second through holes for exposing the end surface of the torque output gear.

3. The adjustable ratchet torque wrench suitable for different types of screwdrivers according to claim 1, characterized in that: The fixed shell includes an upper shell and a lower shell, and the upper shell and the lower shell are fastened together by screws.

4. The adjustable ratchet torque wrench suitable for different types of screwdrivers according to claim 1, characterized in that: The handle includes a handle shell, a torque transmission mechanism is provided inside the end of the handle shell close to the handle head, and a torque adjustment control mechanism is provided inside the other end of the handle shell. One end of the torque transmission mechanism is rotatably connected to the end of the wrench head inserted into the handle shell, a first pin is provided on the fixed shell of the wrench head, and the wrench head is rotatably connected to the handle shell through the first pin, and a claw is rotatably installed on the other end of the torque transmission mechanism, and the torque transmission mechanism conflicts with the torque adjustment control mechanism through the claw.

5. The adjustable ratchet torque wrench suitable for different types of screwdrivers according to claim 4, characterized in that: The torque transmission mechanism includes a first transmission rod and a second transmission rod, one end of the first transmission rod is rotatably connected to the handle head, and the side surface of the other end contacts the side surface of one end of the second transmission rod, the claw is rotatably installed on the end of the second transmission rod away from the first transmission rod, a second pin shaft is provided in the middle of the first transmission rod, and a third pin shaft is provided in the middle of the second transmission rod, the first transmission rod is rotatably connected to the handle housing through the second pin shaft, and the second transmission rod is rotatably connected to the handle housing through the third pin shaft.

6. The adjustable ratchet torque wrench suitable for different types of screwdrivers according to claim 5, characterized in that: The ends of the first transmission rod and the second transmission rod that contact each other are both configured as wedge-shaped structures, and the ends of the wedge-shaped structures are both configured as curved surfaces.

7. The adjustable ratchet torque wrench suitable for different types of screwdrivers according to claim 5, characterized in that: A first spring groove is provided on the side of the second transmission rod, and a first return spring is installed in the first spring groove. One end of the first return spring is installed in the first spring groove, and the other end conflicts with the inner wall of the handle housing. A second spring groove is provided on the end of the second transmission rod away from the first transmission rod, and a second return spring is installed in the second spring groove. One end of the second return spring is installed in the second spring groove, and the other end is fixedly connected to a return ball. The end of the return ball away from the second return spring conflicts with the end face of the claw away from the torque adjustment control mechanism.

Images