A centrifugal shift transmission

Abstract

This application discloses a centrifugal shift transmission, including a spindle, a housing, an input component, a centrifugal block, a control ring, a first pawl, and a planetary gear mechanism. The housing, input component, and control ring are rotatably mounted on the spindle. The planetary gear mechanism is connected to the housing. One end of the first pawl is rotatably connected to the housing, and the other end is used to engage with the gear ring of the planetary gear mechanism. A control portion is provided on the outer periphery of the control ring, and an engagement portion is provided on the other end of the first pawl. When the control ring rotates a first angle in a first direction, the control portion contacts the surface of the first pawl, causing the engagement portion to engage with the gear ring. When the control ring rotates a second angle in a second direction, the engagement portion is lifted by the control portion and separated from the gear ring. The engagement method of the control ring and the first pawl in this transmission allows the control ring and the first pawl to be positioned at the same axial position on the spindle, thereby reducing the axial dimension of the transmission.

Description

Technical Field

[0001] This patent application relates to the field of transmission technology, specifically to a centrifugal shift transmission. Background Technology

[0002] Centrifugal-driven internal transmissions can switch gears based on input or output speed via centrifugal swivels. Currently, various structural designs exist for this type of internal transmission. To meet diverse market demands, a different centrifugal shifting structure is proposed for selection. Utility Model Content

[0003] In view of this, the purpose of this patent application is to provide an internal gear hub and vehicle to solve the problem of the large overall size of the aforementioned internal gear hub.

[0004] To solve the above-mentioned technical problems, this patent proposes a centrifugal shift transmission, including a spindle, a housing, an input component, a centrifugal block, a control ring, a first pawl, and a planetary gear mechanism. The housing, the input component, and the control ring are rotatably sleeved on the spindle. The planetary gear mechanism is connected to the housing. The input component is used to provide driving force transmitted through the planetary gear mechanism to drive the housing to rotate.

[0005] One end of the first pawl is rotatably connected to the outer casing, and the other end is used to engage with the gear ring of the planetary gear mechanism;

[0006] The centrifugal block is rotatably connected to the outer shell. The rotation of the outer shell drives the centrifugal block to rotate. The rotation of the centrifugal block drives the control ring to rotate by a first angle in a first direction, so that the other end of the first pawl engages with the gear ring and changes the transmission ratio of the planetary gear mechanism.

[0007] The outer periphery of the control ring is provided with a control part, and the other end of the first pawl is provided with a biting part;

[0008] When the control ring rotates at a first angle along the first direction, the control part contacts the first pawl surface, causing the biting part to engage with the toothed ring.

[0009] When the control ring rotates at a first angle along the second direction, the biting part is lifted by the control part and separates from the toothed ring.

[0010] The first direction is opposite to the second direction.

[0011] Preferably, the control part protrudes radially along the control ring, the control part is provided with a driving surface, the first pawl is provided with a mating surface facing the control part, and when the biting part engages with the toothed ring, the driving surface and the mating surface are in contact.

[0012] Preferably, the housing is provided with a pawl seat sleeved on the mandrel. The outer ring side of the pawl seat is connected to the housing, and the inner ring side of the pawl seat is rotatably connected to the control ring. One end of the first pawl is rotatably connected to the pawl seat, and the other end faces the mandrel.

[0013] More preferably, the control ring is provided with a support portion extending circumferentially thereon, and a bearing is sleeved on the outer periphery of the support portion, and the pawl seat is rotatably connected to the control ring through the bearing;

[0014] And / or, the outer ring side of the ratchet seat is threaded to the inner wall of the housing.

[0015] More preferably, the support portion and the control portion are located on opposite sides of the control ring along its axial direction;

[0016] And / or, the control ring is a stamped part.

[0017] More preferably, a centrifuge seat is provided inside the outer casing, the centrifuge seat is connected to the ratchet seat and is spaced apart along the axial direction of the spindle;

[0018] The centrifuge seat is provided with a second rotating shaft, which passes through the centrifuge seat and the centrifuge block in sequence along the axial direction of the spindle and then inserts into the ratchet seat, thereby restricting the centrifuge block to rotate between the centrifuge seat and the ratchet seat.

[0019] More preferably, the centrifuge seat is provided with a sleeve and a reinforcing rib on the side facing the centrifuge block, the second rotating shaft passes through the sleeve through the centrifuge seat, and the reinforcing rib extends to the outer periphery of the sleeve;

[0020] And / or, the control ring is provided with a protrusion, the centrifugal block is provided with a rotating shaft, the second rotating shaft passes through the rotating shaft, and a centrifugal part and a transmission part are respectively provided on both sides of the rotating shaft. The centrifugal part is used to provide centrifugal force, the transmission part is connected to the protrusion, and the centrifugal block drives the control ring to rotate through the transmission part.

[0021] More preferably, the transmission part is provided with a limiting groove, and the protrusion is inserted into the limiting groove.

[0022] More preferably, the planetary gear mechanism includes a planet carrier, a sun gear, and planet gears. The planet carrier is sleeved on the spindle and rotatably connected to the spindle. The sun gear is sleeved on the spindle and fixedly connected to the spindle. The planet gears are rotatably mounted on the planet carrier. The planet gears mesh internally with the sun gear, and the ring gear meshes externally with the planet gears.

[0023] The planetary gear mechanism also includes a transmission seat, which is sleeved on the outside of the planet carrier. The outer ring side of the transmission seat is threaded to the outer shell. The inner ring side of the transmission seat is provided with teeth. At least one second pawl is circumferentially spaced on the outside of the planet carrier. The first end of the second pawl is rotatably connected to the planet carrier, and the second end is used to mesh with the teeth to drive the transmission seat to rotate.

[0024] More preferably, the second pawl is provided in multiple portions and is evenly spaced along the outer circumferential direction of the planetary carrier;

[0025] And / or, the planetary carrier is provided with a second elastic element corresponding to the second pawl, one end of the second elastic element is fixedly connected to the planetary carrier, and the other end is connected to the first end of the second pawl to engage with the teeth;

[0026] And / or, the sun gear is integrally formed with the mandrel.

[0027] Compared with the prior art, the main advantages of the centrifugal shift transmission described in this utility model are as follows:

[0028] The centrifugal shift transmission of this application has a control part provided on the outer periphery of the control ring. When the control ring rotates at a first angle in a first direction, the control part contacts the pawl surface, causing the engagement part to engage with the gear ring. When the control ring rotates at a first angle in a second direction, the engagement part is lifted by the control part and separated from the gear ring. This provides a different engagement method between the control ring and the first pawl, enriching the structural types of centrifugal shift transmissions. Moreover, this engagement method allows the control ring and the first pawl to be set at the same axial position on the spindle, rather than being arranged sequentially along the axial direction of the spindle, thereby reducing the axial dimension of the transmission. Attached Figure Description

[0029] The above and other objects, features, and advantages of this patent application will become clearer through a more detailed description of the preferred embodiments shown in the accompanying drawings. The same reference numerals indicate the same parts throughout the drawings, and the drawings are not intentionally drawn to scale with actual dimensions; the focus is on illustrating the main points of this patent application.

[0030] Figure 1 A three-dimensional structural diagram of a centrifugal shift transmission provided in this application embodiment. Figure 1 ;

[0031] Figure 2 for Figure 1 The A-direction view of the end cap is not shown in the image.

[0032] Figure 3for Figure 2 AA section view in the middle;

[0033] Figure 4 for Figure 2 BB section view in the middle;

[0034] Figure 5 A three-dimensional structural diagram of a centrifugal shift transmission provided in this application embodiment. Figure 2 (The outer casing and the end cap are not shown);

[0035] Figure 6 A schematic diagram of the internal structure of a centrifugal shift transmission provided in this application embodiment. Figure 1 ;

[0036] Figure 7 A schematic diagram of the internal structure of a centrifugal shift transmission provided in this application embodiment. Figure 2 ;

[0037] Figure 8 A schematic diagram of the internal structure of a centrifugal shift transmission provided in this application embodiment. Figure 3 ;

[0038] Figure 9 A schematic diagram of the internal structure of a centrifugal shift transmission provided in this application embodiment. Figure 4 ;

[0039] Figure 10 A three-dimensional structural diagram of the ratchet seat provided in the embodiments of this patent application. Figure 1 ;

[0040] Figure 11 A three-dimensional structural diagram of the ratchet seat provided in the embodiments of this patent application. Figure 2 ;

[0041] Figure 12 A three-dimensional structural diagram of the assembly state of the ratchet seat and the centrifugal seat provided for embodiments of this patent application;

[0042] Figure 13 A three-dimensional structural schematic diagram of the control loop provided for an embodiment of this patent application;

[0043] Figure label:

[0044] The ratchet seat 100 has a first ring portion 110, a second ring portion 120, a mounting through hole 130, and a groove 140.

[0045] First pawl 200, pawl body 210, first pivot 220, biting part 211, mating surface 212, first elastic element 230;

[0046] Centrifuge base 300, annular wall 310, connecting column 320, pin 330, second rotating shaft 340, sleeve 350, reinforcing rib 360;

[0047] Centrifuge block 400, rotating shaft 410, centrifugation part 420, transmission part 430, limiting groove 431;

[0048] Control ring 500, control unit 510, drive surface 511, support unit 520, protrusion 530;

[0049] Planetary gear mechanism 600, gear ring 610, planet carrier 620, sun gear 630, planet gear 640, transmission seat 650, second elastic element 660, second pawl 670;

[0050] 1. Mandrel, 2. Housing, 3. Input component, 4. Bearing, 5. End cap, 6. Adjustment through hole, 7. Adjustment gear, 8. Adjustment hole, 9. First gear, 10. First ring tooth, 101. Second ring tooth, 102. Second gear, 13. Gear disc, 131. Column, 132. Third elastic element, 11. Detailed Implementation

[0051] The technical solution of this patent application will be further described in detail below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement this patent application. However, the embodiments described are not intended to limit this patent application. In this embodiment, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this patent application and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this patent application.

[0052] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to and integrated with the other element, or there may be an intervening element present. The terms "mounted," "one end," "the other end," and similar expressions used in this patent application are for illustrative purposes only.

[0053] This embodiment provides a centrifugal shift transmission, such as Figures 1 to 13 As shown, it includes a spindle 1, a housing 2, an input component 4, a centrifugal block 400, a control ring 500, a first pawl 200, and a planetary gear mechanism 600. The housing 2, the input component 4, and the control ring 500 are rotatably mounted on the spindle 1. The planetary gear mechanism 600 is connected to the housing 2. The input component 4 is used to provide the driving force transmitted through the planetary gear mechanism 600 to drive the housing 2 to rotate.

[0054] One end of the first pawl 200 is rotatably connected to the outer casing 2, and the other end is used to engage with the gear ring 610 of the planetary gear mechanism 600;

[0055] The centrifugal block 400 is rotatably connected to the outer shell 2. The rotation of the outer shell 2 drives the centrifugal block 400 to rotate. The rotation of the centrifugal block 400 drives the control ring 500 to rotate by a first angle in a first direction, so that the other end of the first pawl 200 engages with the gear ring 610 and changes the transmission ratio of the planetary gear mechanism 600.

[0056] A control part 510 is provided on the outer periphery of the control ring 500, and a biting part 211 is provided on the other end of the first pawl 200;

[0057] When the control ring 500 rotates at a first angle along the first direction, the control part 510 contacts the surface of the first pawl 200, causing the biting part 211 to engage with the toothed ring 610.

[0058] When the control ring 500 rotates at a first angle in the second direction, the biting part 211 is lifted by the control part 510 and separates from the toothed ring 610.

[0059] The first direction is opposite to the second direction.

[0060] In this embodiment of the centrifugal shift transmission, a control part 510 is provided on the outer periphery of the control ring 500. When the control ring 500 rotates at a first angle in a first direction, the control part 510 contacts the pawl surface, causing the engagement part 211 to engage with the gear ring 610. When the control ring 500 rotates at a first angle in a second direction, the engagement part 211 is lifted by the control part 510 and separated from the gear ring 610. This provides a different engagement method between the control ring 500 and the first pawl 200, enriching the structural types of the centrifugal shift transmission. Moreover, this engagement method allows the control ring 500 and the first pawl 200 to be set at the same axial position on the spindle 1, rather than being arranged sequentially along the axial direction of the spindle 1, thereby reducing the axial dimension of the transmission.

[0061] In a preferred embodiment, such as Figure 13 As shown, the control part 510 protrudes radially along the control ring 500. The control part 510 is provided with a driving surface 511, and the first pawl 200 is provided with a mating surface 212 facing the control part 510. When the biting part 211 engages with the gear ring 610, the driving surface 511 and the mating surface 212 are in contact. Preferably, both the driving surface 511 and the mating surface 212 are smooth surfaces.

[0062] In another preferred embodiment, a pawl seat 100 is provided inside the housing 2 and sleeved on the spindle 1. The outer ring side of the pawl seat 100 is connected to the housing 2, and the inner ring side of the pawl seat 100 is rotatably connected to the control ring 500. One end of the first pawl 200 is rotatably connected to the pawl seat 100, and the other end faces the spindle 1. In this embodiment, the control ring 500 is located on the inner ring side of the pawl seat 100, which means that the control ring 500 and the pawl seat 100 are located at the same axial position on the spindle 1. The axial dimension of the transmission will not be increased due to the setting of the control ring 500, and the size of the control ring 500 can be reduced to reduce its material usage, thereby reducing costs.

[0063] In a further preferred embodiment, the control ring 500 is provided with a support portion 520 extending circumferentially thereon, and a bearing 5 is sleeved on the outer periphery of the support portion 520. The pawl seat 100 is rotatably connected to the control ring 500 through the bearing 5.

[0064] And / or, the outer ring side of the ratchet seat 100 is threaded to the inner wall of the housing 2, and the ratchet seat 100 and the housing 2 are fixedly connected by the threaded connection, which not only makes installation convenient, but also reduces the cost of connecting the two.

[0065] More preferably, the support portion 520 and the control portion 510 are located on both sides of the control ring 500 in the axial direction, so as to make full use of the axial space occupied by the pawl seat 100 itself.

[0066] And / or, the control ring 500 is a stamped part, or more specifically, an integral stamped sheet.

[0067] In a further preferred embodiment, a centrifuge seat 300 is provided inside the outer casing 2, and the centrifuge seat 300 is connected to the ratchet seat 100 and is spaced apart along the axial direction of the spindle 1;

[0068] The centrifuge seat 300 is provided with a second rotating shaft 340. The second rotating shaft 340 passes through the centrifuge seat 300 and the centrifuge block 400 in sequence along the spindle 1 and then inserts into the ratchet seat 100, thereby restricting the rotation of the centrifuge block 400 between the centrifuge seat 300 and the ratchet seat 100.

[0069] Furthermore, the centrifuge seat 300 is provided with a sleeve 350 and a reinforcing rib 360 on the side facing the centrifuge block 400, the second rotating shaft 340 passes through the centrifuge seat 300 from the sleeve 350, and the reinforcing rib 360 extends to the outer periphery of the sleeve 350.

[0070] And / or, the control ring 500 is provided with a protrusion 530, the centrifugal block 400 is provided with a rotating shaft 410, and a second rotating shaft 340 passes through the rotating shaft 410. A centrifugal section 420 and a transmission section 430 are respectively provided on both sides of the rotating shaft 410. The centrifugal section 420 is used to provide centrifugal force, and the transmission section 430 is connected to the protrusion 530. The centrifugal block 400 drives the control ring 500 to rotate through the transmission section 430. After the centrifugal block 400 rotates around the second rotating shaft 340, its transmission section 430 will rotate synchronously, and drive the control ring 500 to rotate against the preload through the protrusion 530.

[0071] Furthermore, the transmission part 430 is provided with a limiting groove 431, and the protrusion 530 is inserted into the limiting groove 431. In this embodiment, the protrusion 530 is cylindrical, and the transmission part 430 is a cross shape with an opening. This opening facilitates the installation of the protrusion 530 into the transmission part 430.

[0072] In a further preferred embodiment, the planetary gear mechanism 600 includes a planet carrier 620, a sun gear 630, and planet gears 640. The planet carrier 620 is sleeved on the spindle 1 and rotatably connected to the spindle 1. The sun gear 630 is sleeved on the spindle 1 and fixedly connected to the spindle 1. The planet gears 640 are rotatably mounted on the planet carrier 620. The planet gears 640 mesh internally with the sun gear 630, and the gear ring 610 meshes externally with the planet gears 640.

[0073] The planetary gear mechanism 600 also includes a transmission seat 650, which is sleeved on the outside of the planet carrier 620. The outer ring side of the transmission seat 650 is threaded to the outer shell 2, and the inner ring side of the transmission seat 650 is provided with teeth. At least one second pawl 670 is circumferentially spaced on the outer side of the planet carrier 620. The first end of the second pawl 670 is rotatably connected to the planet carrier 620, and the second end is used to mesh with the teeth on the transmission seat 650 to drive the transmission seat 650 to rotate.

[0074] In this embodiment, when the planetary carrier 620 rotates, causing the second pawl 670 on it to engage with the teeth on the inner ring side of the transmission seat 650, and the engaging part 211 of the first pawl 200 separates from the gear ring 610, it is in the first gear; when the control ring 500 rotates, causing the engaging part 211 of the first pawl 200 to engage with the gear ring 610, it is in the second gear.

[0075] Furthermore, multiple second pawls 670 are provided, evenly spaced along the outer circumferential direction of the planet carrier 620.

[0076] The first pawl 200 is provided in at least two parts and is evenly distributed along the circumference of the control ring 500.

[0077] The planetary carrier 620 is provided with a second elastic element 660 corresponding to the second pawl 670. One end of the second elastic element 660 is fixedly connected to the planetary carrier 620, and the other end is connected to the first end of the second pawl 670, so that the first end of the second pawl 670 is engaged with the teeth on the transmission seat 650. In this embodiment, the second elastic element 660 is a spring sheet.

[0078] And / or, the sun gear 630 is integrally formed with the spindle 1.

[0079] In the following embodiments, a ratchet seat is provided:

[0080] like Figures 9 to 11 As shown, it includes a first pawl 200, a first ring portion 110 and a second ring portion 120 coaxially connected. The inner diameter of the first ring portion 110 is smaller than the inner diameter of the second ring portion 120. The first ring portion 110 is provided with a mounting through hole 130 extending axially into the second ring portion 120. One end of the first pawl 200 is rotatably disposed in the mounting through hole 130, and the other end is located within the inner diameter of the second ring portion 120.

[0081] In this embodiment, the pawl seat 100 has a first ring portion 110 and a second ring portion 120 coaxially connected. The inner diameter of the first ring portion 110 is smaller than the inner diameter of the second ring portion 120, allowing a radial space to be formed between the inner ring side of the second ring portion 120 and the inner ring side of the first ring portion 110. The first ring portion 110 has a mounting through hole 130 extending axially into the second ring portion 120. One end of the first pawl 200 is rotatably disposed in the mounting through hole 130, and the other end of the first pawl 200 is located within the inner diameter of the second ring portion 120. On the one hand, one end of the first pawl 200 is rotatably disposed in the mounting through hole 130 without increasing the radial dimension of the pawl seat 100. On the other hand, the aforementioned radial space can be effectively utilized to place the other end of the first pawl 200 without increasing the radial dimension of the pawl seat 100. That is, when the first pawl 200 is disposed, the space formed by the dimensions of the first ring portion 110 and the second ring portion 120 is fully utilized, thereby improving the utilization rate of the space of the pawl seat 100 and reducing the radial dimension of the pawl seat 100.

[0082] In a preferred embodiment, the mounting through hole 130 passes through the first ring portion 110 and the second ring portion 120, and a groove 140 is formed on the inner wall of the second ring portion 120, so that the inner wall of the second ring portion 120 can be utilized to minimize the radial dimension of the first ring portion 110.

[0083] And / or, the first ring portion 110 and the second ring portion 120 are integral structures.

[0084] In another preferred embodiment, the outer diameters of the first ring portion 110 and the second ring portion 120 are the same.

[0085] More preferably, the outer peripheral surfaces of the first ring portion 110 and the second ring portion 120 are provided with continuous threads.

[0086] In another preferred embodiment, the first pawl 200 includes a pawl body 210 and a first rotating shaft 220. One end of the pawl body 210 is connected to the first rotating shaft 220, and the first rotating shaft 220 is inserted into the mounting through hole 130 so that the other end of the pawl body 210 faces the center of the second ring portion 120.

[0087] In a further preferred embodiment, the pawl seat 100 further includes a first elastic element 230, the pawl body 210 is located at one end of the first rotating shaft 220, the other end of the first rotating shaft 220 extends out of the first ring portion 110, and the first elastic element 230 is sleeved on the shaft segment of the first rotating shaft 220 that extends out of the first ring portion 110; the pawl seat 100 is used to be installed in the housing 2 of the transmission, one end of the first elastic element 230 is connected to the first rotating shaft 220, and the other end abuts against the housing 2.

[0088] This embodiment provides a transmission, including the aforementioned ratchet seat 100. Because this transmission uses the ratchet seat 100, it has a smaller radial dimension. One type of transmission also includes a spindle 1, a housing 2, and a ratchet seat 100. The outer circumferential surfaces of the first ring portion 110 and the second ring portion 120 of the ratchet seat 100 are provided with continuous threads. The housing 2 is rotatably fitted onto the spindle 1, and a receiving cavity 3 is formed between the housing 2 and the spindle 1. The ratchet seat 100 is disposed in the receiving cavity 3 and threadedly connected to the inner wall of the housing 2. Fixing the ratchet seat 100 and the housing 2 by a threaded connection not only facilitates installation but also reduces the cost of connecting the two.

[0089] In addition, an embodiment of a centrifugal shift transmission is provided, including a spindle 1, a housing 2, and a ratchet seat 100. The housing 2 is rotatably sleeved on the spindle 1, and a receiving cavity 3 is formed between the housing 2 and the spindle 1. The receiving cavity 3 is provided with a centrifugal seat 300, a centrifugal block 400, and a ratchet seat 100. The centrifugal seat 300 and the ratchet seat 100 are sleeved on the spindle 1 at intervals along the axial direction of the spindle 1. The centrifugal block 400 is disposed between the centrifugal seat 300 and the ratchet seat 100 and is rotatably connected to the centrifugal seat 300. The centrifugal seat 300 is fixedly connected to the housing 2 through the ratchet seat 100. Rotation of the housing 2 can drive the centrifugal block 400 to rotate.

[0090] In this embodiment of the centrifugal shift transmission, the pawl seat 100 includes a first elastic element 230, a first pawl 200, a first ring portion 110 and a second ring portion 120 coaxially connected. The inner diameter of the first ring portion 110 is smaller than the inner diameter of the second ring portion 120. The first ring portion 110 is provided with a mounting through hole 130 extending axially into the second ring portion 120. One end of the first pawl 200 is rotatably disposed in the mounting through hole 130, and the other end is located within the inner diameter of the second ring portion 120. The first pawl 200 includes a pawl body 210 and a first rotating shaft 220. One end of the pawl body 210 is connected to the first rotating shaft 220, and the first rotating shaft 220 is inserted into the mounting through hole 130 so that the other end of the pawl body 210 faces the center of the second ring portion 120. The pawl body 210 is located at one end of the first rotating shaft 220, and the other end of the first rotating shaft 220 extends out of the first ring portion 110. The first elastic member 230 is sleeved on the shaft segment of the first rotating shaft 220 that extends out of the first ring portion 110. The pawl seat 100 is used to install inside the housing 2 of the transmission. One end of the first elastic member 230 is connected to the first rotating shaft 220, and the other end abuts against the housing 2. Similarly, the centrifugal shift transmission in this embodiment can have a smaller radial dimension because it adopts the above-mentioned pawl seat 100.

[0091] Preferably, the centrifuge seat 300 is provided with a connecting post 320 extending toward the pawl seat 100. The centrifuge seat 300 is detachably connected to the pawl seat 100 through the connecting post 320. For example, in this embodiment, the centrifuge seat 300 and the pawl seat 100 are detachably connected by a pin 330 that axially passes through the connecting post 320. One end of the first elastic member 230 is fixed to the first rotating shaft 220, and the other end abuts against the connecting post 320.

[0092] More preferably, the shaft segment extending from the other end of the first rotating shaft 220 into the first ring portion 110 is located in the space between the centrifugal seat 300 and the ratchet seat 100. This makes full use of the original space between the centrifugal seat 300 and the ratchet seat 100, and does not increase the axial dimension of the transmission due to the first rotating shaft 220 extending into the first ring portion 110, thereby reducing the axial dimension of the transmission.

[0093] The following embodiments provide a centrifuge block adjustment device:

[0094] like Figure 2 , 4 As shown in Figures 5 and 6, the device includes a housing 2 and a spindle 1. The housing 2 is rotatably mounted on the spindle 1, and a receiving cavity 3 is formed between the housing 2 and the spindle 1.

[0095] The receiving cavity 3 is provided with a first pawl 200, a centrifuge seat 300, a centrifuge block 400 and a control ring 500. The centrifuge seat 300 is connected to the outer shell 2. The centrifuge seat 300 and the control ring 500 are rotatably sleeved on the spindle 1 and spaced apart along the axial direction of the spindle 1. The centrifuge block 400 is disposed between the centrifuge seat 300 and the control ring 500. The centrifuge block 400 is rotatably connected to the centrifuge seat 300. One end of the first pawl 200 is rotatably connected to the outer shell 2. The control ring 500 is used to control the other end of the first pawl 200 to realize gear shifting.

[0096] One end of the centrifuge block 400 is used to provide centrifugal force, and the other end is connected to the control ring 500;

[0097] On the side of the centrifuge base 300 facing away from the control ring 500, there is an adjusting gear 8, a first gear 10, and a second gear 13. The spindle 1 axially passes through the first gear 10. The first gear 10 is externally meshed with the adjusting gear 8 and the second gear 13. The second gear 13 is provided with a third elastic element 11. One end of the third elastic element 11 is fixedly connected to the second gear 13, and the other end is connected to the control ring 500. It should be noted that the aforementioned fixed connection refers to a connection structure that allows one end of the third elastic element 11 to move with the rotation of the second gear 13, and does not simply refer to a connection that makes the two parts non-detachable.

[0098] In the centrifugal block 400 adjustment device of this embodiment, the spindle 1 axially passes through the first gear 10. The first gear 10 is externally meshed with the adjustment gear 8 and the second gear 13 respectively. The third elastic element 11 is disposed on the second gear 13. One end of the third elastic element 11 is fixedly connected to the second gear 13, and the other end is connected to the control ring 500. By rotating the adjustment gear 8, the second gear 13 can be driven to rotate, thereby adjusting the magnitude of the preload force applied by the third elastic element 11 to the control ring 500, that is, adjusting the magnitude of the centrifugal force from the centrifugal block 400 that can drive the control ring 500 to rotate.

[0099] In this application, the first gear 10 is externally meshed with the adjusting gear 8 and the second gear 13 respectively. The adjusting gear 8 can be set at any angle position in the circumferential direction of the first gear 10. The first gear 10 can drive the second gear 13 to rotate, thereby realizing the magnitude of the centrifugal force that can drive the control ring 500 to rotate. This increases the optional installation space and installation freedom of the adjusting gear 8, and can solve the problem of inconvenient installation caused by the limited installation freedom of the first and second driving components.

[0100] In a preferred embodiment, such as Figure 6 and Figure 7As shown, the centrifuge seat 300 is annular, and an annular wall 310 extending axially along the spindle 1 is provided on the inner ring side of the centrifuge seat 300. The first gear 10 is rotatably sleeved on the outer circumference of the annular wall 310. Specifically, the first gear 10 is clearance-fitted with the outer circumference of the annular wall 310 so that the first gear 10 can rotate on the outer circumference of the annular wall 310.

[0101] In another preferred embodiment, the first gear 10 includes a first ring tooth portion 101 and a second ring tooth portion 102. The teeth of both the first ring tooth portion 101 and the second ring tooth portion 102 are disposed on their outer circumferences. The inner diameter of the first ring tooth portion 101 is the same as the inner diameter of the second ring tooth portion 102, while the outer diameters of the first ring tooth portion 101 and the second ring tooth portion 102 are different. In this embodiment, the outer diameters of the first ring tooth portion 101 and the second ring tooth portion 102 are designed to be unequal to provide a solution for interference during the installation of various components.

[0102] In a further preferred embodiment, the outer diameter of the first ring tooth 101 is smaller than the outer diameter of the second ring tooth 102. The adjusting gear 8 is meshed with the first ring tooth 101, and the second gear 13 is meshed with the second ring tooth 102. This embodiment takes into account the interference between the adjusting gear 8 and other components during installation. By setting the first ring tooth 101 with a small diameter, the distance between the adjusting gear 8 and the spindle 1 can be reduced, thereby avoiding interference.

[0103] In a further preferred embodiment, the first ring tooth portion 101 and the second ring tooth portion 102 are integral structural components.

[0104] In another preferred embodiment, the second gear 13 includes a gear disk 131 and a column 132. The column 132 is disposed on the side of the gear disk 131 facing the control ring 500. One end of the column 132 is connected to the gear disk 131, and the other end extends out of the gear disk 131 along the axial direction of the spindle 1. A third elastic element 11 is sleeved on the outer periphery of the column 132.

[0105] In a further preferred embodiment, the centrifuge seat 300 is provided with a second rotating shaft 340, and the centrifuge block 400 is provided with a rotating shaft portion 410. The second rotating shaft 340 passes through the gear disc 131, the column 132, the centrifuge seat 300, and the rotating shaft portion 410 sequentially along the spindle 1. The control ring 500 is provided with a protrusion 530, and a centrifugal portion 420 and a transmission portion 430 are respectively provided on both sides of the rotating shaft portion 410. The centrifugal portion 420 is used to provide centrifugal force, and the transmission portion 430 is connected to the protrusion 530. The centrifuge block 400 drives the control ring 500 to rotate through the transmission portion 430.

[0106] In a further preferred embodiment, the protrusion 530 is a column 132 that extends toward the centrifugal seat 300, and the other end of the third elastic member 11 abuts against the protrusion 530.

[0107] Based on the above embodiments, this embodiment provides a transmission, including an end cover 6 and a centrifugal block adjustment device as described above. The end cover 6 is disposed at one end of the housing 2 and is provided with an adjustment through hole 7. The adjustment gear 8 passes through the adjustment through hole 7 and is inserted into the receiving cavity 3 to mesh with the first gear 10.

[0108] In this embodiment, the transmission utilizes the aforementioned centrifugal block adjustment device. Because its adjustment gear 8 has 360° of installation freedom, it is not subject to angular constraints when installing the end cover 6. After installing the end cover 6 at any angle, the adjustment gear 8 is inserted into the adjustment through hole 7 from the outside of the end cover 6, thereby realizing the meshing connection between the adjustment gear 8 and the first gear 10. This enables the transmission connection between the adjustment gear 8 and the internal structure of the housing 2 to adjust the rotational preload of the control ring 500. This greatly improves the ease of installation of the end cover 6 and promotes the improvement of installation efficiency.

[0109] Furthermore, the end of the adjusting gear 8 protruding from the end cover 6 is provided with a recessed adjusting hole 9. By providing the adjusting hole 9, the adjusting gear 8 can be rotated from outside the transmission. It should be noted that after installation and use, the adjusting gear 8 can be prevented from axially loosening by adhesive bonding or by external structural components.

[0110] In this specification, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0111] In the description of this specification, the references to terms such as "preferred embodiment," "another embodiment," "other embodiment," or "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0112] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A centrifugal shift transmission, characterized in that: The device includes a spindle, a housing, an input component, a centrifugal block, a control ring, a first pawl, and a planetary gear mechanism. The housing, the input component, and the control ring are rotatably mounted on the spindle. The planetary gear mechanism is connected to the housing. The input component is used to provide driving force transmitted via the planetary gear mechanism to drive the housing to rotate. One end of the first pawl is rotatably connected to the outer casing, and the other end is used to engage with the gear ring of the planetary gear mechanism; The centrifugal block is rotatably connected to the outer shell. The rotation of the outer shell drives the centrifugal block to rotate. The rotation of the centrifugal block drives the control ring to rotate by a first angle in a first direction, so that the other end of the first pawl engages with the gear ring and changes the transmission ratio of the planetary gear mechanism. The outer periphery of the control ring is provided with a control part, and the other end of the first pawl is provided with a biting part; When the control ring rotates at a first angle along the first direction, the control part contacts the first pawl surface, causing the biting part to engage with the toothed ring. When the control ring rotates at a first angle along the second direction, the biting part is lifted by the control part and separates from the toothed ring. The first direction is opposite to the second direction.

2. A centrifugal shift transmission according to claim 1, characterized in that: The control part protrudes radially along the control ring, and the control part is provided with a driving surface. The first pawl is provided with a mating surface facing the control part. When the biting part bites the toothed ring, the driving surface and the mating surface are in contact.

3. A centrifugal shift transmission according to claim 1, characterized in that: The housing contains a pawl seat fitted onto the spindle. The outer ring of the pawl seat is connected to the housing, and the inner ring of the pawl seat is rotatably connected to the control ring. One end of the first pawl is rotatably connected to the pawl seat, and the other end faces the spindle.

4. A centrifugal shift transmission according to claim 3, characterized in that: The control ring is provided with a support portion extending circumferentially thereon, and a bearing is sleeved on the outer periphery of the support portion. The pawl seat is rotatably connected to the control ring through the bearing. And / or, the outer ring side of the ratchet seat is threaded to the inner wall of the housing.

5. A centrifugal shift transmission according to claim 4, characterized in that: The support portion and the control portion are located on opposite sides of the control ring along its axial direction. And / or, the control ring is a stamped part.

6. A centrifugal shift transmission according to claim 3, characterized in that: The outer casing is provided with a centrifugal seat, which is connected to the ratchet seat and is spaced apart along the axial direction of the spindle. The centrifuge seat is provided with a second rotating shaft, which passes through the centrifuge seat and the centrifuge block in sequence along the axial direction of the spindle and then inserts into the ratchet seat, thereby restricting the centrifuge block to rotate between the centrifuge seat and the ratchet seat.

7. A centrifugal shift transmission according to claim 6, characterized in that: The centrifuge seat is provided with a sleeve and a reinforcing rib on the side facing the centrifuge block. The second rotating shaft passes through the sleeve and the centrifuge seat, and the reinforcing rib extends to the outer periphery of the sleeve. And / or, the control ring is provided with a protrusion, the centrifugal block is provided with a rotating shaft, the second rotating shaft passes through the rotating shaft, and a centrifugal part and a transmission part are respectively provided on both sides of the rotating shaft. The centrifugal part is used to provide centrifugal force, the transmission part is connected to the protrusion, and the centrifugal block drives the control ring to rotate through the transmission part.

8. A centrifugal shift transmission according to claim 7, characterized in that: The transmission part is provided with a limiting groove, and the protrusion is inserted into the limiting groove.

9. A centrifugal shift transmission according to any one of claims 1 to 8, characterized in that: The planetary gear mechanism includes a planet carrier, a sun gear, and planet gears. The planet carrier is sleeved on the spindle and rotatably connected to the spindle. The sun gear is sleeved on the spindle and fixedly connected to the spindle. The planet gears are rotatably mounted on the planet carrier. The planet gears mesh internally with the sun gear, and the gear ring meshes externally with the planet gears. The planetary gear mechanism also includes a transmission seat, which is sleeved on the outside of the planet carrier. The outer ring side of the transmission seat is threaded to the outer shell. The inner ring side of the transmission seat is provided with teeth. At least one second pawl is circumferentially spaced on the outside of the planet carrier. The first end of the second pawl is rotatably connected to the planet carrier, and the second end is used to mesh with the teeth to drive the transmission seat to rotate.

10. A centrifugal shift transmission according to claim 9, characterized in that: The second pawl is provided in multiple portions and is evenly spaced along the outer circumferential direction of the planet carrier; And / or, the planetary carrier is provided with a second elastic element corresponding to the second pawl, one end of the second elastic element is fixedly connected to the planetary carrier, and the other end is connected to the first end of the second pawl to engage with the teeth; And / or, the sun gear is integrally formed with the mandrel.

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