Multi-gear transmission with multi-connected planet wheels matched with multi-gear ring structure

Abstract

The utility model relates to a multi-gear transmission with a multi-linkage planet gear matched with a multi-gear ring structure, which comprises an input shaft, a sun gear fixedly arranged in the middle of the input shaft and an input shaft gear fixedly arranged at the end of the input shaft, the sun gear is meshed with the multi-linkage planet gear, and the input shaft gear is meshed with the multi-linkage planet gear. A first gear, a second gear and a third gear which are coaxially and fixedly arranged in sequence and are different in diameter are arranged on the multi-connection planet wheel, the third gear is in meshing transmission with the sun wheel, and the first gear, the second gear and the third gear are meshed with inner teeth of the gear ring A, the gear ring B and the gear ring C correspondingly; outer teeth of the gear ring A, the gear ring B and the gear ring C are respectively meshed with a gear ring control gear a, a gear ring control gear b and a gear ring control gear c which can be selectively stopped; according to the device, only one planet row is used, and the requirement for multi-gear variable speed transmission is met with few elements and small size and weight.

Description

Technical Field

[0001] The utility model relates to a multi-speed transmission with a multi-connected planetary gear and a multi-ring gear structure. Background Art

[0002] In a speed-changing transmission constructed by planetary gears, there are 3 elements on a planetary gear set. By controlling the states of 2 of these elements, 2 different transmission ratios can be obtained. If more than 2 transmission ratios are to be obtained, multiple planetary gear sets must be combined and configured. Therefore, a multi-speed transmission generally contains multiple planetary gear sets. Although multiple planetary gear sets can be optimized in a simple way by sharing a sun gear or a planetary carrier, its essence is still a combination of multiple planetary gear sets. Therefore, there are still many gear parts in the existing multi-speed transmissions with a planetary structure.

[0003] Currently, a Chinese patent is retrieved. The invention name is: Power-shift multi-speed transmission, and the publication number is CN101275630B. It includes several gear transmissions and several shifting elements. The transmission includes two parallel shaft systems. The two parallel shaft systems include 3 planetary gear sets. Each shaft system contains at least one planetary gear set. Each planetary gear set includes a sun gear, a ring gear, and a planetary carrier with several planetary gears. The planetary gear sets are arranged on the two shaft systems. Although a short transmission length can be obtained and the overall design can be made more compact, there are still many gear parts in this multi-speed transmission.

[0004] And currently, a Chinese patent is retrieved. The invention name is: Multi-speed automatic transmission, and the publication number is CN105443685B. It includes a first shaft system WS1, a second shaft system WS2, a first fixed-axis gear set TG69, a second fixed-axis gear set TG56, a third fixed-axis gear set TG17, a first planetary gear set PG1, a second planetary gear set PG2, a third planetary gear set PG3, and 6 shifting elements, namely a first brake B1, a second brake B2, a first clutch C1, a second clutch C2, a third clutch C3, and a fourth clutch C4. Power is input from the first shaft system WS1, output to a differential Diff through the second shaft system WS2, and then transmitted to both wheels through the output ends on both sides of the differential. The first shaft system and the second shaft system are arranged in parallel. Although it is applicable to a front-wheel drive vehicle and has a compact structure, making the vehicle shift response faster, there are still many gear parts in this multi-speed transmission. Summary of the Invention

[0005] In view of the deficiencies of the above-mentioned existing technologies, the purpose of the present utility model is to provide a multi-speed transmission with a multi-connected planetary gear and a multi-ring gear structure. The multi-speed transmission with a multi-connected planetary gear and a multi-ring gear structure and its working method are reasonably designed, which is beneficial to reducing the number of gear parts in the multi-speed transmission with a planetary structure.

[0006] The utility model relates to a multi-speed transmission with a multi-link planetary gear and a multi-tooth ring structure, which is characterized in that: it includes an input shaft, a sun gear fixedly arranged in the middle of the input shaft, and an input shaft gear fixedly arranged at the end of the input shaft. The sun gear meshes with a multi-link planetary gear. The multi-link planetary gear is successively coaxially and fixedly provided with a first gear, a second gear and a third gear with different diameters. Among them, the third gear meshes with the sun gear for transmission. The first gear, the second gear and the third gear respectively mesh with the internal teeth of the ring gear A, the ring gear B and the ring gear C. The external teeth of the ring gear A, the ring gear B and the ring gear C respectively mesh with the ring gear control gears a, b and c that can be selectively stopped, so as to realize the stopping of the ring gear A, the ring gear B or the ring gear C. The input shaft is coaxially provided with a non-connected output shaft. An output shaft gear is fixedly arranged on the output shaft. An engaging sleeve that can rotate coaxially and axially slide is sleeved outside the output shaft gear. An internal toothed ring that can selectively mesh with the input shaft gear or the planet carrier gear on the multi-link planetary gear is arranged on the side of the engaging sleeve.

[0007] Preferably, the above-mentioned ring gear control gears a, b and c are all sleeved and connected to a fixed shaft. A stop hub fixed on the fixed shaft and a sliding sleeve arranged on the stop hub are arranged on the sides of the ring gear control gears a, b and c. After different sliding sleeves axially move, they engage with the stop teeth on the ring gear control gears a, b or c to limit the rotation of the ring gear control gears a, b or c, and limit the rotation of the ring gear A, the ring gear B or the ring gear C.

[0008] Preferably, the above-mentioned sliding sleeve is a spline sleeve, and its outer periphery has a first channel for passive axial movement. The outer peripheries of the stop hub and the stop teeth are spline teeth. The sliding sleeve is always spline-connected to the stop hub. The sliding sleeve is axially moved passively to selectively spline-connect or disengage with the stop teeth.

[0009] Preferably, the central shaft of the above-mentioned multi-link planetary gear is connected to the planet carrier, and the planet carrier gear is arranged on the planet carrier.

[0010] Preferably, the above-mentioned engaging sleeve is a spline sleeve, and its outer periphery has a second channel for passive axial movement. The planet carrier gear, the input shaft gear and the output shaft gear are spline teeth. The engaging sleeve is always spline-connected to the output shaft gear. The engaging sleeve is axially moved passively to selectively spline-connect or disengage with the planet carrier gear and the input shaft gear.

[0011] Preferably, the diameters of the above-mentioned first gear, second gear and third gear are successively reduced, the internal tooth diameters of the ring gear A, the ring gear B and the ring gear C are successively reduced, and the external tooth diameters of the ring gear A, the ring gear B and the ring gear C are the same.

[0012] The working method of a multi-speed transmission with a multi-connected planetary gear and a multi-toothed ring structure of the present utility model is characterized in that:

[0013] Taking the sun gear on the input shaft as the input, the engaging sleeve moves so that the fourth gear on the planet carrier and the output shaft gear are connected through the engaging sleeve and used as the output. By controlling each toothed ring control wheel, three kinds of motions with different transmission ratios can be obtained; First, the maximum transmission ratio condition: Lock the toothed ring control wheel c, that is, make the toothed ring C stationary. With the sun gear as the input, the maximum deceleration in the same rotation direction can be obtained on the planet carrier; Second, the transmission ratio condition one level smaller: Lock the toothed ring control wheel b, that is, make the toothed ring B stationary. When the sun gear 1 inputs at the same rotational speed, a slightly faster rotational output in the same direction can be obtained on the planet carrier; Third, the transmission ratio condition two levels smaller: Lock the toothed ring control wheel a, that is, make the toothed ring A stationary. When the sun gear 1 inputs at the same rotational speed, a faster rotational output in the same direction can be obtained on the planet carrier; When taking the sun gear as the input and using the input shaft gear and the output shaft gear connected through the engaging sleeve as the output, the minimum transmission ratio of 1:1 with the highest rotational efficiency can be obtained, that is, the direct gear.

[0014] The multi-speed transmission with a multi-connected planetary gear and a multi-toothed ring structure of the present utility model can obtain 4 ideal transmission ratios by appropriately configuring the gear parameters of each component. This invention device only uses one planetary row and realizes the requirements of multi-speed transmission with fewer components, smaller size and weight; The toothed ring control wheel can be controlled by a friction method or an engaging sleeve synchronizer structure. When controlled by a friction method, smooth gear shifting can be achieved and the power is not interrupted during the gear shifting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0016] The central control reset foot pedal of the present utility model and its combined connection method will be further described in detail below with reference to the drawings and specific implementation structures.

[0017] Figure 1 is the schematic diagram of the present utility model;

[0018] Figures 2 - 4 is the schematic diagram of three different transmission ratios of the present utility model;

[0019] Figure 5 is the schematic diagram of the direct gear of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0021] The multi-speed transmission with a multi-connected planetary gear and multi-toothed ring structure of the present utility model includes an input shaft 1, a sun gear 2 fixedly arranged in the middle of the input shaft, and an input shaft gear 3 fixedly arranged at the end of the input shaft. The sun gear 2 and the input shaft gear 3 are spaced apart in the axial direction of the input shaft for the arrangement of other components.

[0022] The sun gear 2 meshes with a multi-connected planetary gear 4 (specifically, the sun gear 2 meshes and drives with the third gear 7 on the multi-connected planetary gear 4). The multi-connected planetary gear 4 has a first gear 5, a second gear 6, and a third gear 7 that are coaxially and fixedly arranged in sequence but have different diameters, that is, the first gear 5, the second gear 6, and the third gear 7 are solid and integral coaxial components, and the diameters of the first gear, the second gear, and the third gear decrease in sequence.

[0023] The first gear 5, the second gear 6, and the third gear 7 respectively mesh with the internal teeth of the ring gear A, the ring gear B, and the ring gear C. The external teeth of the ring gear A, the ring gear B, and the ring gear C respectively mesh with the ring gear control gears a, b, and c that can be selectively stopped to achieve the stopping of the ring gear A, the ring gear B, or the ring gear C; the specific structure for realizing the external teeth of the ring gear A, the ring gear B, and the ring gear C respectively meshing with the ring gear control gears a, b, and c that can be selectively stopped to achieve the stopping of the ring gear A, the ring gear B, or the ring gear C can be several types, and among them, a friction method or a hanging sleeve synchronizer structure, etc. can be used to control the selective stopping of the ring gear control wheel.

[0024] The specific structure for realizing the stopping of the ring gear A, the ring gear B, or the ring gear C in this application is as follows:

[0025] The ring gear control gears a, b, and c are all sleeved on the fixed shaft 12. On the sides of the ring gear control gears a, b, and c, there is a stop hub 13 fixed on the fixed shaft 12 and a sliding sleeve 14 arranged on the stop hub. The sliding sleeve 14 is a spline sleeve, and its outer periphery has a first channel 16 for being axially moved by an external force (such as inserting a fork into the first channel for axial movement); after the different sliding sleeves 14 are axially moved, they engage with the stop teeth 15 on the ring gear control gears a, b, or c to limit the rotation of the ring gear control gears a, b, or c, and to limit the rotation of the ring gears A, B, or C. Specifically, the outer peripheries of the stop hub and the stop teeth are spline teeth. The sliding sleeve is always spline-connected to the stop hub, and the sliding sleeve is axially moved by an external force to selectively spline-connect or disengage from the stop teeth. After the sliding sleeve 14 is moved, the sliding sleeve 14 is spline-connected to the stop teeth 15, thereby realizing the ring gear control of the stop teeth and the ring gear stop.

[0026] The input shaft 1 is coaxially provided with an unconnected output shaft 8. An output shaft gear 9 is fixed on the output shaft 8. An engaging sleeve 10 that can rotate coaxially and axially slide is sleeved outside the output shaft gear 9. The side of the engaging sleeve 10 is provided with an internal gear ring that can selectively engage with the input shaft gear 3 or the planet carrier gear 11 on the multi-stage planetary gear; the above-mentioned engaging sleeve 10 is a spline sleeve, and its outer periphery has a second channel 18 for being axially moved by an external force. The planet carrier gear, the input shaft gear, and the output shaft gear are spline teeth. The engaging sleeve is always spline-connected to the output shaft gear, and the engaging sleeve is axially moved by an external force to selectively spline-connect or disengage from the planet carrier gear and the input shaft gear.

[0027] The central shaft of the above-mentioned multi-stage planetary gear 4 is connected to the planet carrier 17, and the planet carrier gear 11 is arranged on the planet carrier.

[0028] The working method of the multi-speed transmission with a multi-stage planetary gear and a multi-ring gear structure of the present invention uses the sun gear on the input shaft as the input. The engaging sleeve moves so that the fourth gear on the planet carrier and the output shaft gear are connected through the engaging sleeve as the output. By controlling each ring gear control wheel, three motions with different transmission ratios are obtained; First, the maximum transmission ratio condition (as shown in Figure 2 ): Lock the ring gear control wheel c, that is, make the ring gear C stationary. With the sun gear input, the maximum deceleration in the same rotation direction can be obtained on the planet carrier; Second, the transmission ratio condition of the next smaller level (as shown in Figure 3 ): Lock the ring gear control wheel b, that is, make the ring gear B stationary. With the same rotational speed input of the sun gear 1, a slightly faster rotational output in the same direction can be obtained on the planet carrier; Third, the transmission ratio condition of the second smaller level (as shown in Figure 4As shown in the figure: The locking ring control wheel a, that is, when the ring gear A is stationary and the sun gear 1 is input at the same rotational speed, a faster rotational output in the same direction can be obtained on the planet carrier; when the sun gear is used as the input and the input shaft gear and the output shaft gear are connected through a coupling sleeve as the output, the highest rotational efficiency of 1:1 minimum transmission ratio, that is, the direct gear, can be obtained.

[0029] The multi-speed transmission with a multi-connected planetary gear and multi-ring gear structure of the present invention can obtain 4 ideal transmission ratios by appropriately configuring the gear parameters of each component. This invention device uses only one planetary gear set to meet the requirements of multi-speed transmission with fewer components, smaller size and weight; The ring gear control wheel can be controlled by a friction method or a coupling sleeve synchronizer structure. When controlled by a friction method, the shift can be made smooth and the power is not interrupted during the shifting process.

[0030] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, various changes and modifications can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention.

Claims

1. A multi-speed transmission with a multi-connected planetary gear and multi-toothed ring structure, characterized in that: It includes an input shaft (1), a sun gear (2) fixedly arranged in the middle of the input shaft, and an input shaft gear (3) fixedly arranged at the end of the input shaft. The sun gear (2) meshes with a multi-link planetary gear (4). The multi-link planetary gear (4) is successively and coaxially fixedly provided with a first gear (5), a second gear (6), and a third gear (7) with different diameters. Among them, the third gear (7) meshes with the sun gear (2) for transmission. The first gear (5), the second gear (6), and the third gear (7) respectively mesh with the internal teeth of a ring gear A, a ring gear B, and a ring gear C. The external teeth of the ring gear A, the ring gear B, and the ring gear C respectively mesh with a ring gear control gear a, a ring gear control gear b, and a ring gear control gear c that can be selectively stopped to achieve the stopping of the ring gear A, the ring gear B, or the ring gear C. The input shaft (1) is coaxially provided with a non-connected output shaft (8). An output shaft gear (9) is fixedly arranged on the output shaft (8). An engaging sleeve (10) that can rotate coaxially and axially slide is sleeved outside the output shaft gear (9). An internal tooth ring that can selectively mesh with the input shaft gear (3) or a planet carrier gear (11) on the multi-link planetary gear is provided on the side of the engaging sleeve (10).

2. The multi-speed transmission with a multi-connected planetary gear and a multi-tooth ring structure according to claim 1, characterized in that: The ring gear control gear a, the ring gear control gear b, and the ring gear control gear c are all sleeved and connected to a fixed shaft (12). A stop hub (13) fixed to the fixed shaft (12) and a sliding sleeve (14) provided on the stop hub are arranged on the sides of the ring gear control gear a, the ring gear control gear b, and the ring gear control gear c. After different sliding sleeves (14) axially move, they engage with stop teeth (15) on the ring gear control gear a, the ring gear control gear b, or the ring gear control gear c to limit the rotation of the ring gear control gear a, the ring gear control gear b, or the ring gear control gear c, and limit the rotation of the ring gear A, the ring gear B, or the ring gear C.

3. The multi-speed transmission with a multi-connected planetary gear and multi-toothed ring structure according to claim 2, characterized in that: The sliding sleeve (14) is a spline sleeve. A first channel (16) for being axially moved by an external force is provided on its outer periphery. The outer peripheries of the stop hub and the stop teeth are spline teeth. The sliding sleeve is always spline-connected to the stop hub. The sliding sleeve is axially moved by an external force to selectively spline-connect with or disengage from the stop teeth.

4. The multi-speed transmission with a multi-connected planetary gear and multi-toothed ring structure according to claim 1, 2 or 3, characterized in that: The central shaft of the multi-link planetary gear (4) is connected to a planet carrier (17). The planet carrier gear (11) is arranged on the planet carrier.

5. The multi-speed transmission with a multi-connected planetary gear and multi-tooth ring structure according to claim 1, 2 or 3, characterized in that: The engaging sleeve (10) is a spline sleeve. A second channel (18) for being axially moved by an external force is provided on its outer periphery. The planet carrier gear, the input shaft gear, and the output shaft gear are spline teeth. The engaging sleeve is always spline-connected to the output shaft gear. The engaging sleeve is axially moved by an external force to selectively spline-connect with or disengage from the planet carrier gear and the input shaft gear.

6. The multi-speed transmission with a multi-connected planetary gear and multi-tooth ring structure according to claim 1, 2 or 3, characterized in that: The diameters of the first gear, the second gear, and the third gear decrease in sequence. The internal tooth diameters of the ring gear A, the ring gear B, and the ring gear C decrease in sequence. The external tooth diameters of the ring gear A, the ring gear B, and the ring gear C are the same.

Images