Gearbox

Abstract

The utility model relates to the technical field of transmissions, in particular to a gearbox which comprises an adjusting turntable, one side face of the adjusting turntable is connected with a transmission gear, a transmission shaft penetrates through the circle center of the transmission gear, and the transmission shaft penetrates through the adjusting turntable and is connected with a transmission part. The end face, facing the transmission gear, of the adjusting rotary disc is rotationally connected with a plurality of speed change gears circumferentially connected to the transmission gear, the transmission gear is provided with a plurality of bisectors relative to the speed change gears, the diameters of the speed change gears are different, each speed change gear corresponds to one bisector, and the diameters of the bisectors are different from the diameters of the speed change gears. The adjusting rotary disc is connected with a driving structure, the driving structure is in driving connection with one speed change gear, and the adjusting rotary disc is connected with a gear shifting mechanism. The utility model aims to enable the gearbox to switch gears more stably and flexibly.

Description

Technical Field

[0001] The utility model relates to the technical field of transmissions, in particular to a transmission case. Background Art

[0002] A gearbox, also known as a transmission, is a mechanism used to change the speed and torque of the engine. It can change the transmission ratio between the output and input shafts in a fixed or step-by-step manner. A transmission consists of a speed-changing transmission mechanism and a control mechanism. When installed in a vehicle, the transmission is also connected to the power take-off (POT). Its primary function is to regulate engine power output, enabling efficient vehicle operation at varying speeds and operating conditions. Existing gearboxes have numerous limitations when shifting. After the PTO comes to a complete stop, it cannot be freely switched to another gear, which can easily lead to shift failures and even damage to the PTO. Utility Model Content

[0003] The main purpose of the utility model is to provide a gearbox, which is designed to enable the gearbox to switch gears more stably and flexibly.

[0004] To achieve the above-mentioned purpose, the utility model proposes a gearbox, including an adjusting dial, one side of the adjusting dial is connected to a transmission gear, the center of the transmission gear is penetrated by a transmission shaft, the transmission shaft is penetrated by the adjusting dial and is connected to a transmission part, the adjusting dial rotates toward the end face of the transmission gear and is connected to a plurality of speed gears circumferentially connected to the transmission gear, the transmission gear is provided with a plurality of bisectors relative to the plurality of speed gears, the diameters of the plurality of speed gears are different, and each of the speed gears corresponds to a bisector, the adjusting dial is connected to a driving structure, the driving structure is driven and connected to one of the speed gears, and the adjusting dial is connected to a shifting mechanism.

[0005] In one embodiment of the present application, the speed change gear includes a first adjustment part and a second adjustment part, the first adjustment part and the second adjustment part are coaxially arranged, the first adjustment part is drivingly connected to the driving structure, and the second adjustment part is connected to the transmission gear.

[0006] In one embodiment of the present application, the plurality of speed gears are connected to the transmission gear in sequence from large to small according to the diameter of the second adjustment part, the speed gear with the largest diameter of the second adjustment part is adjacent to the speed gear with the smallest diameter, the speed gear with the largest diameter of the second adjustment part has the smallest diameter of the first adjustment part, and the plurality of speed gears are arranged in sequence from small to large according to the diameter of the first adjustment part.

[0007] In one embodiment of the present application, the sum of the diameter values ​​of the first adjustment portion and the diameter values ​​of the second adjustment portion of different speed change gears is the same.

[0008] In one embodiment of the present application, the shift mechanism includes a separation push rod and a rotation structure:

[0009] The separation push rod is perpendicular to the adjustment dial and connected to the transmission shaft, and the pushing direction of the separation push rod is set in a direction away from the driving structure;

[0010] The rotating structure is rotatably connected to the adjusting dial, the rotating structure and the adjusting dial are coaxially arranged, and the rotating structure is provided with an angle limiting module relative to a bisector of the adjusting dial.

[0011] In one embodiment of the present application, the shift mechanism includes a protective housing, a shift structure, and a separation structure:

[0012] The protective housing is provided with a speed change slot, which includes an adjustment section and a plurality of locking sections, wherein the plurality of locking sections are evenly spaced and connected to one side of the adjustment section;

[0013] The shift structure includes a shift lever, a drive rack and a rotating wheel. The rotating wheel and the transmission shaft are coaxially arranged. The shift lever is slidably connected to the shift slot. The drive rack is connected to one side of the shift lever. The shift lever is drivingly connected to the rotating wheel.

[0014] The separation structure includes a connecting piece, a push rod and a separation cover. The connecting piece is sleeved on the shift lever, and the push rod is rotatably connected to the connecting piece. One end face of the separation cover faces the adjustment dial, and the other end face faces the transmission part and is provided with a return spring. The connecting piece is slidably connected to the side of the separation structure, and the push rod is provided with a push strip on the end face of the separation cover facing the adjustment dial.

[0015] By adopting the above technical solution, the utility model has the following advantages:

[0016] 1. A transmission gear is coaxially arranged on the adjusting dial, and a plurality of speed gears are arranged toward the outer periphery of the transmission gear. The plurality of speed gears equally divide the outer periphery of the transmission gear. The diameters of different gears are different. When the output power of the driving structure remains unchanged, the driving structure is connected to different speed gears and the speed of the transmission part will change, thereby completing the speed shifting operation. This gearbox has a simple structure and a low damage rate, and can achieve a relatively stable speed shifting effect.

[0017] 2. The adjustment dial is installed with the transmission gear and the speed gear, and the transmission shaft is connected to the transmission gear to make the transmission part rotate in conjunction, which can ensure the strength of the transmission and avoid structural damage. By pushing the adjustment dial, the entire speed change and transmission related structure can be easily separated from the drive structure, so that the drive structure is idle. At this time, the gear shifting structure is used to make different speed gears face the drive structure, and then the adjustment dial is reset and connected to the changed speed gear to complete the speed change. The whole process is relatively safe and stable, and the drive structure will not be affected during gear shifting. As long as the adjustment dial is rotated, the speed change can be completed. The whole speed change process is relatively flexible and safe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0019] Figure 1 This is a schematic structural diagram of a gearbox of the present invention;

[0020] Figure 2 This is a schematic structural diagram of an adjustment dial of a gearbox according to the present invention;

[0021] Figure 3 This is a front view of an adjustment dial of a gearbox according to the present invention.

[0022] Description of Figure Numbers:

[0023] 1. Adjustment dial; 2. Transmission gear; 3. Transmission shaft; 4. Transmission unit; 5. Speed ​​change gear; 51. First adjustment unit; 52. Second adjustment unit; 6. Drive structure; 7. Shift mechanism.

[0024] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0026] Reference Figures 1 to 3In order to achieve the above-mentioned purpose, the utility model proposes a gearbox, including an adjusting dial 1, one side of the adjusting dial 1 is connected to a transmission gear 2, the center of the transmission gear 2 is penetrated by a transmission shaft 3, the transmission shaft 3 is penetrated by the adjusting dial 1, and is connected to a transmission part 4, the adjusting dial 1 rotates toward the end surface of the transmission gear 2 and is connected to a plurality of speed change gears 5 circumferentially connected to the transmission gear 2, the transmission gear 2 is provided with a plurality of bisectors relative to the plurality of speed change gears 5, the diameters of the plurality of speed change gears 5 are different, and each speed change gear 5 corresponds to a bisector, the adjusting dial 1 is connected to a driving structure 6, the driving structure 6 is drivingly connected to a speed change gear 5, and the adjusting dial 1 is connected to a gear shifting mechanism 7.

[0027] A transmission gear 2 is coaxially provided on the adjusting dial 1, and a plurality of speed change gears 5 are provided toward the outer periphery of the transmission gear 2. The plurality of speed change gears 5 equally divide the outer periphery of the transmission gear 2. The diameters of different gears are different. When the output power of the driving structure 6 remains unchanged, the driving structure 6 is connected to different speed change gears 5 and the rotational speed of the transmission part 4 will change, thereby completing the speed change operation. This gearbox has a simple structure and a low damage rate, and can achieve a relatively stable speed change effect.

[0028] The adjusting dial 1 is installed with the transmission gear 2 and the speed gear 5, and the transmission shaft 3 is connected to the transmission gear 2 to make the transmission part 4 rotate in conjunction, which can ensure the strength of the transmission and avoid structural damage. By pushing the adjusting dial 1, the entire speed change and transmission related structure can be easily separated from the driving structure 6, so that the driving structure 6 is idle. At this time, the gear shifting structure is used to make the different speed gears 5 face the driving structure 6, and then the adjusting dial 1 is reset and connected to the changed speed gear 5 to complete the speed change. The whole process is relatively safe and stable, and the driving structure 6 will not be affected during gear shifting. As long as the adjusting dial 1 is rotated, the speed change can be completed. The whole speed change process is relatively flexible and safe.

[0029] The driving structure 6 can be driven by an electric motor or equipped with a pedal, both of which can be used to drive the gears, so that the gears drive the speed-changing gears 5, thereby achieving normal operation of the gearbox.

[0030] See also Figures 1 to 3 In one embodiment of the present application, the speed change gear 5 includes a first adjusting portion 51 and a second adjusting portion 52. The first adjusting portion 51 and the second adjusting portion 52 are coaxially arranged. The first adjusting portion 51 is driven and connected to the driving structure 6, and the second adjusting portion 52 is connected to the transmission gear 2.

[0031] The upper part of the speed change gear 5, that is, the first adjustment part 51 is connected to the drive structure 6, and the second adjustment part 52 is connected to the transmission gear 2. The entire speed change gear 5 is more stable in structure and can transmit the power of the drive structure 6 to the transmission part 4.

[0032] See also Figures 1 to 3 In one embodiment of the present application, multiple speed gears 5 are connected to the transmission gear 2 in sequence from large to small according to the diameter of the second adjustment part 52, the speed gear 5 with the largest diameter of the second adjustment part 52 is adjacent to the speed gear 5 with the smallest diameter, the speed gear 5 with the largest diameter of the second adjustment part 52 has the smallest diameter of the first adjustment part 51, and the multiple speed gears 5 are arranged in sequence from small to large according to the diameter of the first adjustment part 51.

[0033] The speed gear 5 drives the connected driving structure 6, and the first adjusting part 51 completely receives the power from the driving structure 6. The first adjusting parts 51 of different speed gears 5 can be regarded as having the same linear velocity. The smaller the diameter of the first adjusting part 51, the greater its angular velocity. The second adjusting part 52 has the same angular velocity as the first adjusting part 51, and the larger the diameter of the second adjusting part 52, the greater its linear velocity under the premise of the same angular velocity. Therefore, the diameter of the first adjusting part 51 of the speed gear 5 representing the maximum gear of the transmission is the smallest among all the speed gears 5, and the diameter of the second adjusting part 52 is the largest among all the speed gears 5. In order to make the gear switching more stable, the different speed gears 5 are arranged from large to small according to the gear values ​​they represent, which can make the gear switching more flexible and accurate.

[0034] See also Figure 3 In one embodiment of the present application, the sum of the diameter values ​​of the first adjustment portion 51 and the diameter values ​​of the second adjustment portion 52 of different speed change gears 5 is the same.

[0035] In order to make it easier to adjust the gear after the adjustment dial 1 is rotated, the distance between the driving structure 6 and the center of the transmission gear 2 is a constant, and the maximum distance between the outer diameter of the first adjustment part 51 of the speed change gear 5 and the center of the transmission gear 2 can be regarded as the radius value of the transmission gear 2 plus the radius value of the second adjustment part 52 plus the radius value of the first adjustment part 51. If the sum of the diameter values ​​of the first adjustment parts 51 and the diameter values ​​of the second adjustment parts 52 of different speed change gears 5 is the same, it means that the maximum distance between the outer diameters of different first adjustment parts 51 and the center of the transmission gear 2 is the same, that is, the relative distances between different speed change gears 5 and the driving structure 6 are the same, so that the operation of the gearbox is more stable.

[0036] See also Figure 1 In one embodiment of the present application, the shift mechanism 7 includes a separation push rod and a rotating structure. The separation push rod is perpendicular to the adjusting dial 1 and connected to the transmission shaft 3. The pushing direction of the separation push rod is set in a direction away from the driving structure 6; the rotating structure is rotatably connected to the adjusting dial 1, the rotating structure and the adjusting dial 1 are coaxially arranged, and the rotating structure is provided with an angle limiting module relative to the bisector of the adjusting dial 1.

[0037] The gear shifting mechanism 7 can be an automatic or semi-automatic motor drive structure 6. The separation push rod can push the adjustment dial 1 in the direction away from the drive structure 6. In order to ensure the stability of the push, the separation push rod is generally connected to the center of the transmission gear 2, so that the entire adjustment dial 1 is subjected to more uniform force. After the speed gear 5 and the drive structure 6 are separated, it is only necessary to rotate the adjustment dial 1 to complete the speed change. The angle limiting module is set according to the bisector of the transmission gear 2, so that each angle of rotation of the adjustment dial 1 corresponds to a speed gear 5, making the speed change effect of the gearbox more stable and flexible.

[0038] See also Figure 1 In one embodiment of the present application, the shift mechanism 7 includes a protective shell, a shift structure and a separation structure. The protective shell is provided with a shift slot, the shift slot includes an adjustment section and multiple locking sections, and the multiple locking sections are evenly spaced and connected to one side of the adjustment section; the shift structure includes a shift lever, a drive rack and a rotating wheel, the rotating wheel and the transmission shaft 3 are coaxially arranged, the shift lever is slidably connected to the shift slot, the drive rack is connected to one side of the shift lever, and the shift lever is driven and connected to the rotating wheel; the separation structure includes a connecting piece, a push rod and a separation cover, the connecting piece is sleeved on the shift lever, the push rod is rotatably connected to the connecting piece, one end face of the separation cover faces the adjustment dial 1, and the other end face faces the transmission part 4 and is provided with a return spring, the connecting piece is slidably connected to the side of the separation structure, and the push rod is provided with a push bar toward the end face of the separation cover facing the adjustment dial 1.

[0039] The gear shift mechanism 7 can also be a manual structure. Each locking section of the gear shift groove on the protective housing is a gear position. When the gear shift lever reaches the bottom adjustment section, the locking section no longer locks the gear shift lever, and the gear shift lever can shift freely. At this time, the connecting part will drive the push rod so that the push bar of the push rod moves toward the separation cover. The separation cover will pull the adjustment dial 1 to separate the adjustment dial 1 from the driving structure 6. When the gear shift lever is pushed, the driving rack moves synchronously. At the same time, because the adjustment dial 1 moves toward the rack, the dial can be driven to move as the rack moves to complete the speed change. In order to make the rotation of the driving rack more stable, a transmission wheel can be set between the driving rack and the rotating wheel. The transmission wheel can be a bevel gear for transfer, so that the gearbox can stably and flexibly switch gears. This switching method will not affect the driving structure 6. Shifting after the adjustment dial 1 is separated can well protect various components.

[0040] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0041] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A gearbox comprising an adjusting dial, characterized in that: A transmission gear is connected to one side of the adjusting dial, and a transmission shaft is passed through the center of the transmission gear. The transmission shaft is passed through the adjusting dial and connected to a transmission part. The adjusting dial rotates toward the end face of the transmission gear and is connected to a plurality of speed gears circumferentially connected to the transmission gear. The transmission gear is provided with a plurality of bisectors relative to the plurality of speed gears, and the diameters of the plurality of speed gears are different. Each of the speed gears corresponds to a bisector. The adjusting dial is connected to a driving structure, and the driving structure is driven and connected to one of the speed gears. The adjusting dial is connected to a gear shifting mechanism.

2. A gearbox according to claim 1, characterized in that: The speed change gear includes a first adjusting portion and a second adjusting portion, the first adjusting portion and the second adjusting portion are coaxially arranged, the first adjusting portion is drivingly connected to the driving structure, and the second adjusting portion is connected to the transmission gear.

3. A gearbox according to claim 2, characterized in that: The plurality of speed gears are connected to the transmission gear in sequence from large to small according to the diameter of the second adjustment part, the speed gear with the largest diameter of the second adjustment part is adjacent to the speed gear with the smallest diameter, the speed gear with the largest diameter of the second adjustment part has the smallest diameter of the first adjustment part, and the plurality of speed gears are arranged in sequence from small to large according to the diameter of the first adjustment part.

4. A gearbox according to claim 3, characterized in that: The sum of the diameter values ​​of the first adjustment portion and the second adjustment portion of different speed change gears is the same.

5. The gearbox according to claim 1, characterized in that: The shift mechanism comprises: a separation push rod, the separation push rod being perpendicular to the adjustment dial and connected to the transmission shaft, the pushing direction of the separation push rod being set in a direction away from the driving structure; A rotating structure is rotatably connected to the adjusting dial, the rotating structure and the adjusting dial are coaxially arranged, and the rotating structure is provided with an angle limiting module relative to the bisector of the adjusting dial.

6. The gearbox according to claim 1, characterized in that: The shift mechanism comprises: A protective housing is provided with a speed change slot, the speed change slot including an adjustment section and a plurality of locking sections, the plurality of locking sections being evenly spaced and connected to one side of the adjustment section; A shift structure, comprising a shift lever, a drive rack, and a rotating wheel, wherein the rotating wheel and the transmission shaft are coaxially arranged, the shift lever is slidably connected to the shift slot, the drive rack is connected to one side of the shift lever, and the shift lever is drivingly connected to the rotating wheel; The separation structure includes a connecting piece, a push rod and a separation cover. The connecting piece is sleeved on the shift lever, and the push rod is rotatably connected to the connecting piece. One end face of the separation cover faces the adjustment dial, and the other end face faces the transmission part and is provided with a return spring. The connecting piece is slidably connected to the side of the separation structure, and the push rod is provided with a push strip on the end face of the separation cover facing the adjustment dial.

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