Positioning mechanism for gear transmission

Abstract

The utility model discloses a gear transmission positioning mechanism which comprises a transmission gear pair and a positioning mechanism abutting against the transmission gear pair, and further comprises an outer cover, the transmission gear pair comprises a driving gear and a transmission gear pair meshed with the driving gear, the driving gear is hinged to the outer cover in the axial direction, and the transmission gear pair is hinged to the outer cover in the axial direction. The driving gear comprises two center plate planes perpendicular to the axial direction, and the positioning mechanism makes contact with one center plate plane in a pressing mode and forms braking with the center plate plane. Parts needing to be screwed are limited in the transmission gear pair, the driving gear rotates along with the external acting force, so that the center plate plane rotates along with the driving gear, the contact between the positioning arm and the thickest position of the center plate plane is changed into the contact between the positioning arm and the step, and meanwhile, the top of the compression spring is gradually changed into a loose state from a compressed state. Therefore, the positioning arm can stably abut against the step, continuous rotation of the driving gear is limited, and the purpose that the part can be screwed and installed at the fixed torque every time the part is installed is achieved.

Description

Technical Field

[0001] The utility model relates to the field of mechanical assembly, in particular to the field of a positioning mechanism of gear transmission. Background Art

[0002] At present, in the field of mechanical assembly, the internal structure of the assembly is often complex and the operating space is small, which makes it impossible to use conventional tightening mechanism tools for auxiliary assembly during assembly, and it is even more impossible to quickly tighten and assemble a large number of threads with the same torque in a limited operating space. The utility model is to solve the above problems. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, the utility model provides a positioning mechanism of gear transmission, including a transmission gear pair, a positioning mechanism that interferes with the transmission gear pair, and also includes an outer cover covering the transmission gear pair, the outer side of the transmission gear pair and fixedly connected to the positioning mechanism, the transmission gear pair includes a driving gear, and a transmission gear pair that meshes with the driving gear, the driving gear and the outer cover are hinged in the axial direction, the driving gear includes two web planes perpendicular to the axial direction, the positioning mechanism is pressed against one of the web planes and forms a brake with the web plane.

[0004] Preferably, the positioning mechanism includes a positioning seat fixed to the outer cover, a positioning arm hinged to the positioning seat, and an elastic member that is interference fit with the positioning arm. A U-shaped opening is provided on the upper portion of the positioning seat, one end of the positioning arm is hinged in the U-shaped opening, the elastic square of the elastic member is in the same axial direction as the driving gear, and the positioning arm is pressed into contact with the plane of the web.

[0005] Preferably, the positioning arm is provided with a mounting hole in the same axial direction as the driving gear, and the elastic member is installed in the mounting hole by interference fit and partially extends out of the mounting hole.

[0006] Preferably, the thickness of the web plane starts to decrease smoothly along one side of one of the radiuses toward the other side of the radius, and the end where the thickness of the web plane decreases forms a step.

[0007] Preferably, the thickness of the web plane in the angular direction ranges from the beginning along one side of one radius toward the end where the thickness smoothly decreases on the other side of the radius, which is less than or equal to 360°.

[0008] Preferably, the elastic member is configured as a compression spring.

[0009] The technical solution adopted by the utility model to solve its technical problems is: a positioning mechanism of gear transmission, the parts to be tightened are limited in the transmission gear pair, when the utility model is in the reset state, the cross-section base of the positioning arm is at the starting position where the thickness decreases smoothly, the compression spring is in the compressed state, with the external force, the driving gear rotates, so the web plane follows the rotation, the contact of the positioning arm with the thickest part of the web plane changes to abutment with the step, and at the same time, the top of the compression spring gradually changes from the compressed state to the relaxed state, so that the positioning arm can stably abut against the step, limiting the continued rotation of the driving gear, so as to achieve the purpose of tightening the installed parts with a fixed torque each time the parts are installed, so as to achieve the purpose of assembling the parts with a fixed torque even if the external force driving and the tightening position are not in the same space. Adjust the starting position of the end face contact of the positioning arm, or set the amplitude of the thickness of the web plane from the beginning along one side of one radius to the end of the other side of the radius where the thickness decreases smoothly in the angular direction, so as to achieve the purpose of adjusting the torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a main structural schematic diagram of a gear-driven positioning mechanism of the utility model.

[0011] Figure 2 The utility model is a schematic diagram of the overall structure of a positioning mechanism of a gear transmission.

[0012] Figure 3 The utility model is a structural schematic diagram of a positioning mechanism of a gear-driven positioning mechanism.

[0013] Figure 4 The utility model is a structural schematic diagram of a driving gear of a positioning mechanism of a gear transmission. DETAILED DESCRIPTION

[0014] The implementation methods of the present invention are described below in conjunction with the accompanying drawings and relevant embodiments. The implementation methods of the present invention are not limited to the following embodiments, and the present invention involves relevant necessary components in this technical field, which should be regarded as common knowledge in this technical field and can be known and mastered by technical personnel in this technical field.

[0015] In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present utility model. In addition, the terms "one", "two", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0016] Reference Figures 1 to 4 The utility model is implemented as follows: a positioning mechanism of a gear transmission, comprising a transmission gear pair 1, a positioning mechanism 2 that contacts the transmission gear pair 1, and an outer cover 3 covering the transmission gear pair 1 and the outer side of the transmission gear pair 1 and fixedly connected to the positioning mechanism 2. The transmission gear pair 1 comprises a driving gear 11 and a transmission gear pair 12 that meshes with the driving gear 11. The driving gear 11 is hinged to the outer cover 3 in the axial direction. The driving gear 11 comprises two web planes 111 that are perpendicular to the axial direction. The positioning mechanism 2 is pressed against one of the web planes 111 and forms a brake with the web plane 111.

[0017] The parts to be tightened are confined in the transmission gear pair 12, and the external force drives the driving gear 11 to rotate, thereby driving the transmission gear pair 12 meshing with the driving gear 11 to rotate, and then driving the parts to be rotated to complete the assembly of the parts. As the driving gear 11 rotates, the positioning mechanism 2 presses the web plane 111 of the driving gear 11 to form a brake, so that the driving gear 11 no longer rotates, thereby achieving the purpose of assembling the parts with a fixed torque. Thereby achieving the purpose of assembling the parts with a fixed torque even if the external force driving and the tightening position are not in the same space.

[0018] Based on the above embodiment, as a further preference, the thickness of the web plane 111 decreases smoothly from one side of one radius toward the other side of the radius, and the end where the thickness of the web plane 111 decreases forms a step 1111.

[0019] The elastic member 23 is configured as a compression spring. The positioning mechanism 2 comprises a positioning seat 21 fixed to the outer cover 3, a positioning arm 22 hinged to the positioning seat 21, and an elastic member 23 with interference fit to the positioning arm 22. A U-shaped opening 211 is configured at the upper portion of the positioning seat 21, and one end of the positioning arm 22 is hinged in the U-shaped opening 211. When the torque is in place, the other end of the positioning arm 22 contacts the step 1111 in the direction of its actual radius to form a brake.

[0020] The elastic square of the elastic member 23 is in the same axial direction as the driving gear 11 , and the positioning arm 22 is pressed against the web plane 111 .

[0021] The positioning arm 22 is provided with a mounting hole 221 in the same axial direction as the driving gear 11 , the elastic member 23 is installed in the mounting hole 221 by interference fit and partially extends out of the mounting hole 221 , and the top of the elastic member 23 extending out of the mounting hole 221 contacts the outer cover 3 .

[0022] When the utility model is in a reset state, the end face of the positioning arm 22 contacts the starting position where the thickness decreases smoothly, and the elastic member 23 is in a compressed state. With the external force, the driving gear 11 rotates, so that the web plane 111 rotates accordingly, and the contact between the positioning arm 22 and the thickest part of the web plane 111 turns into a conflict with the step 1111. At the same time, the top of the elastic member 23 gradually changes from a compressed state to a relaxed state, so that the positioning arm 22 can stably contact the step 1111, limiting the continued rotation of the driving gear 11, thereby achieving the purpose of tightening the installed components with a fixed torque each time the components are installed.

[0023] After the installation is completed, the driving gear 11 is reset by external force and the next tightening installation is carried out.

[0024] Based on the above embodiment, as a further preference, the thickness of the web plane 111 decreases smoothly from the beginning along one side of one radius toward the end along the other side of the radius, and the amplitude in the angular direction is less than or equal to 360°.

[0025] In the present invention, according to the torque required by the installed parts, the thickness of the web plane 111 can be set to be the amplitude in the angular direction from the beginning along one side of one radius toward the end of the other side of the radius that decreases smoothly. At the same time, the starting position of the end surface contact of the positioning arm 22 can be adjusted when the reset state is set, so as to adjust the rotation amplitude of the driving gear 11, thereby achieving the purpose of adjusting the torque.

[0026] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A gear-driven positioning mechanism, characterized in that The invention comprises a transmission gear pair (1), a positioning mechanism (2) abutting against the transmission gear pair (1), and an outer cover (3) covering the transmission gear pair (1) and the outer side of the transmission gear pair (1) and fixedly connected to the positioning mechanism (2); the transmission gear pair (1) comprises a driving gear (11) and a transmission gear pair (12) meshing with the driving gear (11); the driving gear (11) and the outer cover (3) are hinged in the axial direction; the driving gear (11) comprises two web planes (111) perpendicular to the axial direction; the positioning mechanism (2) is pressed against one of the web planes (111) and forms a brake with the web plane (111).

2. A gear-driven positioning mechanism as claimed in claim 1, characterized in that The positioning mechanism (2) comprises a positioning seat (21) fixed to the outer cover (3), a positioning arm (22) hinged to the positioning seat (21), and an elastic member (23) interference-fitted with the positioning arm (22); a U-shaped opening (211) is provided at the top of the positioning seat (21); one end of the positioning arm (22) is hinged in the U-shaped opening (211); the elastic square of the elastic member (23) is in the same axial direction as the driving gear (11); and the positioning arm (22) is in pressure contact with the web plane (111).

3. A gear-driven positioning mechanism as claimed in claim 2, characterized in that The positioning arm (22) is provided with a mounting hole (221) having the same axial direction as the driving gear (11), and the elastic member (23) is installed in the mounting hole (221) by interference fit and partially extends out of the mounting hole (221).

4. A gear-driven positioning mechanism as claimed in claim 1, characterized in that The thickness of the web plane (111) decreases smoothly from one side of one of the radius toward the other side of the radius, and the end where the thickness of the web plane (111) decreases forms a step (1111).

5. A gear-driven positioning mechanism as claimed in claim 1, characterized in that The thickness of the web plane (111) decreases smoothly from the beginning along one side of one radius toward the end along the other side of the radius, and the amplitude in the angular direction is less than or equal to 360 degrees.

6. A gear-driven positioning mechanism as claimed in claim 2, characterized in that The elastic member (23) is configured as a compression spring.

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