Gear box structure capable of rotating directionally
By designing mutually coordinated left-hand and right-hand ratchet mechanisms in the gear box, the problem that existing gear boxes cannot maintain the directional output at the output is solved, and the directional output is realized when the transmission direction of the input is arbitrarily changed, reducing costs and improving Applicability.
Patent Information
- Application Number
- CN202421207398.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-30
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-05-30
AI Technical Summary
The existing gearbox cannot maintain the directional rotation of the output when the input end is rotated forward and reverse, and it relies on server control, which is costly and inefficient, and cannot meet the requirement of maintaining the direction of the output end when the transmission direction is arbitrarily changed.
A gear box structure including an input shaft, an output shaft and a gear shaft is designed. By setting up a mutually cooperating left-hand and right-hand ratchet mechanism to ensure that the output end remains in a directional output when the transmission direction of the input end changes, and the ratchets of different rotation directions are used. The mechanism cooperates to achieve clockwise or counterclockwise output.
It realizes directional output of the output terminal transmission direction when changing the input terminal transmission direction arbitrarily, reduces cost and simplifies the structure. It is suitable for a variety of scenarios, including mechanical counting devices and directional transmission devices, and has a wide range of applicability.
Smart Images
Figure CN222351378U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gear boxes, in particular to a gear box structure with directional rotation. Background Art
[0002] The rotary mechanical counters currently available on the market can only be used in scenarios with a single rotation input direction. For example, a skipping rope with a mechanical counter can only be used at the left or right fixed end when in use. If the direction is changed, the counter will lose its function.
[0003] The directional transmission structures supplied on the market, if the input end needs to have directional output rotation in both forward and reverse directions, most of them rely on servo control, which is costly, complex in structure, and inefficient. The pure gearboxes on the market will change the output end when the direction of rotation at the input end changes, and cannot output in a directional manner. Utility Model Content
[0004] The utility model aims to solve the shortcomings of the prior art and proposes a gear box with simple structure, reasonable design and capable of always maintaining the directional rotation of the transmission direction of the output end under the premise of arbitrarily changing its transmission direction.
[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:
[0006] A directional rotating gearbox structure comprises a gearbox seat, an input shaft, an output shaft and a gear shaft are arranged on the gearbox seat, the input shaft is provided with a power gear, the output shaft is provided with a first transmission gear and a first ratchet mechanism meshing with the power gear for transmission, the gear shaft is provided with a second transmission gear meshing with the power gear and a second ratchet mechanism meshing with the first transmission gear for transmission, and the rotation directions of the first ratchet mechanism and the second ratchet mechanism are completely opposite.
[0007] Preferably, the first ratchet mechanism is a left-handed ratchet mechanism, which comprises a left-handed ratchet and a left-handed pawl that cooperate with each other, the left-handed ratchet and the output shaft are clearance-fitted, and the left-handed pawl and the first transmission gear are both interference-fitted with the output shaft.
[0008] Preferably, the second ratchet mechanism is a right-handed ratchet mechanism, which includes a right-handed ratchet and a right-handed pawl that cooperate with each other, the right-handed ratchet and the gear shaft are clearance-fitted, and the right-handed pawl and the second transmission gear are both interference-fitted with the gear shaft.
[0009] Preferably, the first ratchet mechanism is a right-handed ratchet mechanism, which comprises a right-handed ratchet and a right-handed pawl that cooperate with each other, the right-handed ratchet and the output shaft are clearance-fitted, and the right-handed pawl and the first transmission gear are interference-fitted with the output shaft.
[0010] Preferably, the second ratchet mechanism is a left-handed ratchet mechanism, which includes a left-handed ratchet and a left-handed pawl that cooperate with each other, the left-handed ratchet and the gear shaft are clearance-fitted, and the left-handed pawl and the second transmission gear are both interference-fitted with the gear shaft.
[0011] Preferably, three groups of mounting positioning holes are correspondingly arranged at the front and rear of the gear box seat.
[0012] Preferably, a partition plate for abutting against the power gear is provided on one side of the gear box seat.
[0013] Preferably, an output gear is provided at the end of the output shaft.
[0014] Compared with the prior art, the beneficial effects of the utility model are:
[0015] 1. The directional rotating gearbox of the utility model can change its transmission direction at the input end of the pure mechanical transmission gearbox at will, without affecting the transmission direction of the output end, that is, whether the input end is clockwise or counterclockwise, the output direction of the output end can be all clockwise or all counterclockwise. The key lies in the cooperation of the two ratchet mechanisms with different rotation directions, which fully meets the use requirements of directional transmission output. It has a simple structure, is easy to install, is energy-saving and environmentally friendly, and its cost is greatly reduced compared with the private service control structure.
[0016] 2. The utility model is suitable for motion mechanisms in which the direction of external force driving changes randomly but the output direction cannot change, such as mechanical counting devices, directional transmission devices and other scenarios. It is also suitable for application scenarios with small installation space and light load. It is highly practical and has a wide range of applicability. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of the assembly of a directional rotating gearbox structure of the utility model;
[0018] Figure 2 This is an exploded schematic diagram of a directional rotating gearbox structure of the utility model;
[0019] Figure 3 It is a schematic diagram of a directional rotating gearbox structure without a gearbox seat of the utility model;
[0020] Figure 4 It is a schematic diagram of the left-handed ratchet mechanism 7a of the present invention;
[0021] Figure 5 This is a schematic diagram of the right-hand ratchet mechanism 7A of the present utility model;
[0022] Figure 6 It is a schematic diagram of the right-hand ratchet mechanism 9b of the present invention;
[0023] Figure 7 It is a schematic diagram of the left-handed ratchet mechanism 9B of the present invention;
[0024] Figure 8 It is a schematic diagram of another ratchet mechanism of the utility model. DETAILED DESCRIPTION
[0025] 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 of 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.
[0026] See also Figures 1 to 8 A gearbox structure for directional rotation includes a gearbox seat 1, an input shaft 2, an output shaft 3 and a gear shaft 4 are arranged on the gearbox seat 1, a power gear 5 is arranged on the input shaft 2, a first transmission gear 6 and a first ratchet mechanism 7 meshing with the power gear 5 are arranged on the output shaft 3, a second transmission gear 8 meshing with the power gear 5 and a second ratchet mechanism 9 meshing with the first transmission gear 6 are arranged on the gear shaft 4, the rotation directions of the first ratchet mechanism 7 and the second ratchet mechanism 9 are completely opposite, and the ratchet mechanisms of opposite rotation directions make one of them in a stopped working state and the other in a slipping non-working state during the input transmission process to ensure the directional output of the output shaft 3, when the input shaft 2 is clockwise input, if it meshes with the power gear 5 The first ratchet mechanism 7 is engaged to stop the rotation, that is, the output shaft 3 directly outputs counterclockwise. When the input shaft 2 is counterclockwise input, the first ratchet mechanism 7 meshing with the power gear 5 is in a non-working state of slipping, and the second transmission gear 8 meshing with the power gear 5 rotates clockwise, directly driving the second ratchet mechanism 9 to a clockwise non-rotating working state. Since the second ratchet mechanism 9 is meshed with the first transmission gear 6 for transmission, the first transmission gear 6 will be controlled to rotate counterclockwise to achieve indirect counterclockwise output of the output shaft 3. In other words, no matter whether the input end is clockwise or counterclockwise, the output direction of the output end can be all clockwise or all counterclockwise. The key lies in the cooperation of the two ratchet mechanisms with different rotation directions, which fully meets the use requirements of directional transmission output. The structure is simple, easy to install, energy-saving and environmentally friendly, and the cost of a pure mechanical transmission gearbox is greatly reduced compared to a private service control structure.
[0027] The first ratchet mechanism 7 is a left-handed ratchet mechanism 7a, which includes a left-handed ratchet 7a1 and a left-handed pawl 7a2 that cooperate with each other. The left-handed ratchet 7a1 is clearance-fitted with the output shaft 3, and the left-handed pawl 7a2 and the first transmission gear 6 are interference-fitted with the output shaft 3.
[0028] The second ratchet mechanism 9 is a right-handed ratchet mechanism 9b, which includes a right-handed ratchet 9b1 and a right-handed pawl 9b2 that cooperate with each other. The right-handed ratchet 9b1 is clearance-fitted with the gear shaft 4, and the right-handed pawl 9b2 and the second transmission gear 8 are both interference-fitted with the gear shaft 4.
[0029] Example 1: The above is an implementation method of always maintaining clockwise output
[0030] Specifically: when the input shaft 2 drives the power gear 5 to rotate clockwise, since the power gear 5 and the second transmission gear 8 are in a meshing state, the gear shaft 4 and the right-handed pawl 9b2 are forced to rotate counterclockwise; since the right-handed pawl 9b2 rotates counterclockwise, it and the right-handed ratchet 9b1 are in a stopped working state, thereby forcing the right-handed ratchet 8 to rotate counterclockwise together, and due to the meshing action, the first transmission gear 6 is also driven to rotate clockwise. Since the first transmission gear 6 and the output shaft 3 are interference fit, this action indirectly realizes the clockwise rotation of the output shaft 3; when the input shaft 2 drives the power gear 5 to rotate clockwise, the left-handed ratchet 7a1 meshing with the power gear 5 rotates counterclockwise, and at this time the left-handed ratchet 7a1 and the left-handed pawl 7a2 are in a slipping and non-working state. Since the left-handed ratchet 7a1 and the output shaft 3 are in a clearance fit, they do not interfere with any movement of the output transmission shaft. At this point, the movements of all components with a clockwise input direction are completed.
[0031] When the input shaft 2 drives the power gear 5 to rotate counterclockwise, the left-handed ratchet 7a1 meshed with the power gear 5 rotates clockwise, and at this time the left-handed ratchet 7a1 and the left-handed pawl 7a2 are in a non-rotating working state, so the left-handed pawl 7a2 drives the output shaft 3 and the first transmission gear 6 to rotate clockwise together, and this action directly realizes the clockwise rotation of the output shaft 3; the first transmission gear 6 rotates clockwise and drives the right-handed ratchet 9b1 meshed with it to rotate counterclockwise together. Since the right-handed ratchet 9b1 and the right-handed pawl 9b2 are in a non-working state when rotating counterclockwise, they do not interfere with any action of the right-handed pawl 9b2 and its related parts; when the input shaft 1 drives the power gear 5 to rotate counterclockwise, the second transmission gear 8 meshed with it will drive the gear shaft 4 and the right-handed pawl 9b2 to rotate clockwise together. Since the right-handed ratchet 9b1 and the right-handed pawl 9b2 are in a slipping motion at this time, their corresponding actions are invalid and do not affect any action of the output shaft 3.
[0032] The first ratchet mechanism 7 is a right-handed ratchet mechanism 7A, which includes a right-handed ratchet 7A1 and a right-handed pawl 7A2 that cooperate with each other. The right-handed ratchet 7A1 is clearance-fitted with the output shaft 3, and the right-handed pawl 7A2 and the first transmission gear 6 are interference-fitted with the output shaft 3.
[0033] The second ratchet mechanism 9 is a left-handed ratchet mechanism 9B, which includes a left-handed ratchet 9B1 and a left-handed pawl 9B2 that cooperate with each other. The left-handed ratchet 9B1 is clearance-fitted with the gear shaft 4, and the left-handed pawl 9B2 and the second transmission gear 8 are both interference-fitted with the gear shaft 4.
[0034] Embodiment 2: The above is an implementation method of always maintaining counterclockwise output
[0035] Specifically: when the input shaft 2 drives the power gear 5 to rotate clockwise, the right-handed ratchet 7A1 meshing with the power gear 5 rotates counterclockwise, and at this time the right-handed ratchet 7A1 and the right-handed ratchet pawl 7A2 are in a stopped working state, thereby driving the output shaft 4 and the first transmission gear 6 to rotate counterclockwise, and this action directly realizes the counterclockwise rotation of the output shaft 3; since the first transmission gear 6 is meshed with the left-handed ratchet 9B1, the left-handed ratchet 9B1 rotates clockwise, and at this time the left-handed ratchet 9B1 and the left-handed ratchet 9B2 are in a slipping and non-working state, and thus do not interfere with any movement of the gear shaft 4, and the second transmission gear 8 meshing with the power gear 5 rotates counterclockwise, and the gear shaft 4 and the left-handed ratchet 9B2 rotate counterclockwise together with the second transmission gear 8, and the left-handed ratchet 9B1 and the left-handed ratchet pawl 9B2 do not affect each other, and at this point, the movements of all components with a clockwise input direction are all completed.
[0036] When the input shaft 2 drives the power gear 5 to rotate counterclockwise, the right-handed ratchet 7A1 meshing with the power gear 5 rotates clockwise, and at this time the right-handed ratchet 7A1 and the right-handed ratchet pawl 7A2 slip and are in a non-working state. Since the right-handed ratchet 7A1 and the output shaft 3 are in clearance fit, they do not interfere with any movement of the output shaft 3, and the second transmission gear 8 meshing with the power gear 5 rotates clockwise, and the gear shaft 4 and the left-handed ratchet pawl 9B2 rotate clockwise with the second transmission gear 8. At this time, the left-handed ratchet 9B1 and the left-handed ratchet pawl 9B2 are in a stopped working state. Since the left-handed ratchet 9B1 is meshed and transmitted with the first transmission gear 6, the first transmission gear 6 is controlled to rotate counterclockwise, thereby indirectly realizing the counterclockwise rotation of the output shaft 3.
[0037] Specifically: the ratchet mechanism can also be Figure 8 In the form of expression shown, the same technical effect can be achieved by replacing the ratchet and pawl mechanism of the above embodiment with different ratchet wheels 100 and pawls 101.
[0038] The gear box seat 1 is provided with three groups of installation positioning holes 11 correspondingly at the front and rear, and the installation positioning holes 11 ensure the stable assembly of the input shaft 2, the output shaft 3 and the gear shaft 4.
[0039] A partition plate 12 for abutting against the power gear 5 is provided on one side of the gear box seat 1 , and the partition plate 12 ensures the stability of the transmission of the power gear 5 .
[0040] An output gear 31 is disposed at the end of the output shaft 3 .
[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A gearbox structure for directional rotation, comprising a gearbox seat, characterized in that: An input shaft, an output shaft and a gear shaft are arranged on the gear box seat; a power gear is arranged on the input shaft; a first transmission gear and a first ratchet mechanism meshing with the power gear are arranged on the output shaft; a second transmission gear meshing with the power gear and a second ratchet mechanism meshing with the first transmission gear are arranged on the gear shaft; and the rotation directions of the first ratchet mechanism and the second ratchet mechanism are completely opposite.
2. A directional rotating gearbox structure according to claim 1, characterized in that: The first ratchet mechanism is a left-handed ratchet mechanism, which includes a left-handed ratchet and a left-handed pawl that cooperate with each other. The left-handed ratchet is clearance-fitted with the output shaft, and the left-handed pawl and the first transmission gear are interference-fitted with the output shaft.
3. A directional rotation gearbox structure according to claim 2, characterized in that: The second ratchet mechanism is a right-handed ratchet mechanism, which includes a right-handed ratchet and a right-handed pawl that cooperate with each other. The right-handed ratchet and the gear shaft are clearance-fitted, and the right-handed pawl and the second transmission gear are both interference-fitted with the gear shaft.
4. A directional rotation gearbox structure according to claim 1, characterized in that: The first ratchet mechanism is a right-handed ratchet mechanism, which includes a right-handed ratchet and a right-handed pawl that cooperate with each other. The right-handed ratchet is clearance-fitted with the output shaft, and the right-handed pawl and the first transmission gear are interference-fitted with the output shaft.
5. A directional rotation gearbox structure according to claim 4, characterized in that: The second ratchet mechanism is a left-handed ratchet mechanism, which includes a left-handed ratchet and a left-handed pawl that cooperate with each other. The left-handed ratchet and the gear shaft have a clearance fit, and the left-handed pawl and the second transmission gear both have an interference fit with the gear shaft.
6. A directional rotating gearbox structure according to any one of claims 1 to 5, characterized in that: The gear box seat is provided with three groups of installation positioning holes correspondingly at the front and rear.
7. A directional rotating gearbox structure according to any one of claims 1 to 5, characterized in that: A partition plate for abutting against the power gear is provided on one side of the gear box seat.
8. A directional rotating gearbox structure according to any one of claims 1 to 5, characterized in that: An output gear is arranged at the end of the output shaft.