Gearbox and vehicle

Abstract

The utility model relates to a gearbox and a vehicle. The gearbox comprises a shell, a gear ring and a limiting piece. The shell is provided with an accommodating cavity; the gear ring is at least partially arranged in the containing cavity, and a first limiting part is arranged on the periphery of the gear ring. The limiting piece is at least partially arranged on the periphery of the gear ring in a sleeving mode, the limiting piece is fixed to the shell, in the axial direction of the gear ring, a part of the gear ring is arranged between the shell and the limiting piece, a second limiting part is arranged on the inner wall, facing the gear ring, of the limiting piece, and the second limiting part and the first limiting part are arranged in the circumferential direction of the gear ring. Therefore, the second limiting part limits the amplitude of the first limiting part rotating in the circumferential direction. According to the gearbox, fixing and limiting of the gear ring are concentrated on the limiting piece, and the independent limiting piece is easier to mount, dismount and replace.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle production, in particular to a gearbox and a vehicle. BACKGROUND

[0002] The gearbox is an important component in the drive train of a vehicle. The driving force from the engine reaches the required torque, speed, steering and other parameters in the gearbox through a series of transmission mechanisms, and then is transmitted to the wheels. For most vehicles, especially the gearbox of an electric vehicle, it is an important function to reduce the output torque of the engine. In order to obtain a larger transmission ratio in the limited space of the gearbox to achieve the function of reducing the output torque, a gear ring is usually provided, which is usually fixed to the housing of the gearbox. Due to the limited space inside the gearbox, it is necessary to have high assembly accuracy and complex installation process to fix the gear ring in the housing. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a gearbox and a vehicle, which aims to improve the installation convenience of the gear ring to some extent.

[0004] In a first aspect, the present application provides a gearbox, which comprises a housing, a gear ring and a limiting piece. The housing has a receiving cavity. The gear ring is at least partially arranged in the receiving cavity, and the outer periphery of the gear ring is provided with a first limiting part. The limiting piece is at least partially sleeved on the outer periphery of the gear ring, and is fixed to the housing. In the axial direction of the gear ring, a part of the gear ring is arranged between the housing and the limiting piece. The inner wall of the limiting piece facing the gear ring is provided with a second limiting part. The second limiting part and the first limiting part are arranged along the circumferential direction of the gear ring, so as to limit the amplitude of the circumferential rotation of the first limiting part.

[0005] The gearbox provided by the present application comprises a housing, a gear ring and a limiting piece. The gear ring is fixed to the housing through the limiting piece, and the first limiting part of the gear ring cooperates with the second limiting part of the limiting piece to limit the amplitude of the circumferential rotation of the gear ring. Therefore, the fixation and limitation of the gear ring are concentrated on the limiting piece. As an independent component, the limiting piece can be designed according to the size of the torque transmission of the gear ring and the size of the circumferential rotation amplitude of the gear ring. Compared with directly limiting the gear ring through the housing, the adaptability and flexibility of the whole gearbox are improved, so as to better adapt to diversified working environments and motion requirements. Moreover, the independent limiting piece is easier to install, disassemble and replace, without the need for large-scale disassembly and adjustment of the whole gearbox. This is not only conducive to the installation of the gear ring, but also makes the gearbox have maintenance convenience and reduces the maintenance cost of the gearbox.

[0006] According to one of the embodiments of the present application, the gear ring further comprises a third limiting portion, the third limiting portion is arranged axially with the first limiting portion, and the first limiting portion is located on the side of the third limiting portion facing the limiting member; in the radial direction of the gear ring, the third limiting portion protrudes from the first limiting portion; and in the axial direction, the third limiting portion partially overlaps the limiting member.

[0007] In these optional embodiments, the third limiting portion can realize the limiting of the gear ring in the axial direction, reduce the excessive shaking or deviation of the gear ring in the axial direction, and also limit the gear ring from slipping out of the housing.

[0008] According to one of the embodiments of the present application, in the axial direction of the gear ring, the third limiting portion and the limiting member are provided with a gap.

[0009] In these optional embodiments, the third limiting portion and the limiting member are provided with a certain gap, allowing the axial floating of the gear ring during work, realizing load sharing, and effectively alleviating the phenomenon of uneven load.

[0010] According to one of the embodiments of the present application, the gear ring comprises a plurality of first limiting portions; the limiting member comprises a plurality of second limiting portions; and the plurality of first limiting portions and the plurality of second limiting portions are arranged alternately in the circumferential direction of the gear ring.

[0011] In these optional embodiments, the gear ring can uniformly disperse the torque generated by the transmission to each first limiting portion, the first limiting portion and the corresponding second limiting portion cooperate with each other to bear and transmit the force, improve the phenomenon of stress concentration, and be conducive to improving the structural stability of the gear ring.

[0012] According to one of the embodiments of the present application, a key groove is formed between two adjacent first limiting portions, at least part of the second limiting portion is accommodated in the key groove, and the key groove is gap-fitted with the second limiting portion in the circumferential direction.

[0013] In these optional embodiments, the key groove and the second limiting portion are embedded and gap-fitted, realizing the limiting of the gear ring in the circumferential direction and the transmission of the torque. In addition, the gap-fitted key groove and the second limiting portion allow the circumferential floating of the gear ring during work, realizing load sharing.

[0014] According to one of the embodiments of the present application, the cross-sectional shape of the first limiting portion in the radial direction of the gear ring is one of a rectangle, a trapezoid, or an involute.

[0015] According to one of the embodiments of the present application, the cross-sectional shape of the second limiting portion in the radial direction of the gear ring is one of a rectangle, a trapezoid, or an involute.

[0016] According to one of the embodiments of the present application, the limiting member is provided with a connecting portion at the end of the limiting member away from the gear ring in the radial direction of the gear ring, and the connecting portion is used to connect the housing.

[0017] In the optional embodiments, the connecting part connects the limiting part and the housing, so that the gear ring, the limiting part and the housing form an organic whole structure. During the operation of the mechanical system, the force acting on the gear ring can be more effectively transmitted to the housing through the limiting part, thereby reducing the risk of deformation, displacement or damage of the gear ring and the limiting part due to excessive force.

[0018] According to an embodiment of the present application, the connecting part is provided with a mounting hole penetrating through the connecting part along the axial direction of the gear ring; and the transmission further comprises a connecting member penetrating through the mounting hole and connected to the housing.

[0019] In the optional embodiments, the mounting hole and the connecting member are matched to realize the connection between the limiting part and the housing, facilitate the installation and disassembly of the limiting part and the housing, and simplify the installation mode of the limiting part and the housing.

[0020] According to an embodiment of the present application, the connecting part is provided with a positioning hole penetrating through the connecting part along the axial direction of the gear ring; and the transmission further comprises a positioning member penetrating through the positioning hole and fixed to the housing.

[0021] In the optional embodiments, during the assembly of the transmission, the cooperation between the positioning hole and the positioning member can provide accurate axial positioning for the limiting part, improve the assembly accuracy, and increase the connection stability of the limiting part and the housing.

[0022] According to an embodiment of the present application, the gear ring has an end portion protruding from the limiting part along the axial direction of the gear ring, and the end portion is away from the first limiting portion; and the housing comprises a positioning portion, and the end portion abuts against the positioning portion along the axial direction of the gear ring.

[0023] In the optional embodiments, the positioning portion is used to limit the axial direction of the gear ring.

[0024] According to an embodiment of the present application, the housing comprises a fourth limiting portion, and the fourth limiting portion is located on the side of the positioning portion close to the gear ring along the axial direction, and the positioning portion protrudes from the fourth limiting portion in the radial direction of the gear ring; and the limiting part is connected to the fourth limiting portion.

[0025] According to an embodiment of the present application, the end portion and the fourth limiting portion are provided with a gap in the radial direction of the gear ring.

[0026] In the optional embodiments, the above arrangement facilitates the installation and positioning of the gear ring.

[0027] In a second aspect, the present application provides a vehicle comprising the transmission according to the foregoing.

[0028] The above description is only a summary of the technical solutions of the present application. In order to enable one skilled in the art to better understand the technical means of the present application and to implement the same according to the contents of the description, and in order to enable the above and other purposes, characteristics and advantages of the present application to be more apparent and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0029] The features, advantages, and technical effects of the exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0030] Figure 1 is a partial exploded view of a gearbox provided by an embodiment of the present application;

[0031] Figure 2 is a radial cross-sectional view of a gearbox provided by an embodiment of the present application;

[0032] Figure 3 is a radial cross-sectional view of a gearbox provided by an embodiment of the present application at A; Figure 2

[0033] Figure 4 is a radial cross-sectional view of a gearbox provided by an embodiment of the present application at B; Figure 2

[0034] Figure 5 is a structural schematic view of a first limiting part and a second limiting part of a gearbox provided by an embodiment of the present application;

[0035] Figure 6 is a structural schematic view of a first limiting part and a second limiting part of a gearbox provided by another embodiment of the present application;

[0036] Figure 7 is a structural schematic view of a first limiting part and a second limiting part of a gearbox provided by yet another embodiment of the present application.

[0037] The accompanying drawings are not necessarily drawn to scale.

[0038] Explanation of Reference Signs

[0039] 100, gearbox;

[0040] 1, housing; 11, accommodating cavity; 12, positioning part; 13, fourth limiting part;

[0041] 2, ring gear; 21, first limiting part; 22, third limiting part; 23, key groove; 24, end part;

[0042] 3, limiting member; 31, second limiting part; 32, connecting part; 33, mounting hole; 34, positioning hole;

[0043] 4, connecting member; ​​

[0044] 5. Positioning member;

[0045] x, axial; y, radial. DETAILED DESCRIPTION

[0046] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0047] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as those commonly understood by one of ordinary skill in the art to which this application belongs; the terms used in the specification of the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover the non-exclusive inclusion. The terms "first", "second" and the like in the specification and claims of the present application and the above description of drawings are used to distinguish different objects, not to describe a particular order or primary and secondary relationship.

[0048] In the present application, the term "embodiment" means that the specific features, structures or characteristics described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment to other embodiments.

[0049] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mount", "connect", "connection", "attach" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0050] In the present application, the term "and / or" is only a description of the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present application generally represents a "or" relationship between the front and rear associated objects.

[0051] In the embodiments of the present application, the same reference signs represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, and the overall thickness, length, width and other dimensions of the integrated device are only exemplary and should not constitute any limitation on the present application.

[0052] The "multiple" appearing in the present application refers to two or more (including two).

[0053] The ring gear in the gearbox is mainly connected with the housing to realize torque transmission and circumferential limiting. This kind of mode needs to form a structure matched with the ring gear on the housing and improve the structural precision by mechanical finishing, for example, the inner spline matched with the outer spline of the ring gear. For the machining of the housing, not only the machining time is long, but also the manufacturing cost is increased. Moreover, due to the limited internal space of the gearbox, it is required to have high assembly precision and complex installation process to fix the ring gear in the housing. The above statements are only used to provide background technical information related to the present application and do not necessarily constitute the prior art.

[0054] The gearbox provided by the present application comprises a housing, a ring gear and a limiting piece. The ring gear is fixed to the housing through the limiting piece, and the first limiting part of the ring gear is matched with the second limiting part of the limiting piece. The limiting piece limits the circumferential rotation amplitude of the ring gear. Therefore, the fixation and limiting of the ring gear are concentrated on the limiting piece. As an independent component, the limiting piece can be designed according to the size of the torque transmission of the ring gear and the size of the circumferential rotation amplitude of the ring gear. Compared with directly limiting the ring gear through the housing, the adaptability and flexibility of the whole gearbox are improved, so as to better adapt to diversified working environments and motion requirements. Moreover, the independent limiting piece is easier to install, disassemble and replace. Without the need of large-scale disassembly and adjustment of the whole gearbox, it is not only beneficial to the installation of the ring gear, but also makes the gearbox have convenient maintenance, thereby reducing the maintenance cost of the gearbox.

[0055] The vehicle can be a fuel automobile, a gas automobile or a new energy automobile. The new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range extended automobile, etc.

[0056] Referring to Figure 1 and Figure 2 , Figure 1 is a partial exploded view of the gearbox provided by an embodiment of the present application; Figure 2 is a radial sectional view of the gearbox provided by an embodiment of the present application.

[0057] As Figure 1 and Figure 2As shown, the application provides a gearbox 100, which comprises a housing 1, a ring gear 2 and a limiting member 3. The housing 1 has a receiving cavity 11. The ring gear 2 is at least partially arranged in the receiving cavity 11, and the outer periphery of the ring gear 2 is provided with a first limiting portion 21. The limiting member 3 is at least partially sleeved on the outer periphery of the ring gear 2, and is fixed to the housing 1. In the axial direction x of the ring gear 2, a part of the ring gear 2 is arranged between the housing 1 and the limiting member 3. The inner wall of the limiting member 3 facing the ring gear 2 is provided with a second limiting portion 31, and the second limiting portion 31 and the first limiting portion 21 are arranged along the circumferential direction of the ring gear 2, so that the second limiting portion 31 limits the circumferential rotation range of the first limiting portion 21.

[0058] The housing 1 can be a hollow structure, and the receiving cavity 11 for accommodating the ring gear 2 and the limiting member 3 is formed inside the housing 1.

[0059] In some examples, the housing 1 can be a steel shell, an aluminum shell or a composite metal shell (such as a copper-aluminum composite shell).

[0060] In some examples, the housing 1 can be a cylindrical shell, a square shell, a prismatic shell or other shaped shell.

[0061] The ring gear 2 is arranged in the receiving cavity 11 of the gearbox 100, and the ring gear 2 is an important transmission component, which can transmit power from the engine or other power source to other components of the gearbox 100.

[0062] In some examples, the ring gear 2 has a ring structure.

[0063] The outer periphery of the ring gear 2 is provided with a first limiting portion 21. The first limiting portion 21 is arranged on the outer side of the ring gear 2, and is used to cooperate with the limiting member 3. The first limiting portion 21 can limit the circumferential rotation of the ring gear 2 and transmit torque.

[0064] In some examples, the number of first limiting portions 21 on the ring gear 2 can be one or more.

[0065] For example, the ring gear 2 includes one first limiting portion 21, and the first limiting portion 21 is arranged at least one circle along the outer periphery of the ring gear 2.

[0066] For example, the ring gear 2 includes a plurality of first limiting portions 21, and the plurality of first limiting portions 21 are arranged at intervals along the outer periphery of the ring gear 2.

[0067] In some examples, the structure of the first limiting portion 21 includes one or more of a boss structure, a groove structure or a shoulder structure.

[0068] The limiting member 3 is at least partially sleeved on the outer periphery of the gear ring 2, and is fixed to the housing 1. In the axial direction x of the gear ring 2, a part of the gear ring 2 is arranged between the housing 1 and the limiting member 3. It can be understood that, in the axial direction x of the gear ring 2, a part of the gear ring 2 is projected to overlap with the projection part of the limiting member 3, and another part of the gear ring 2 protrudes from the limiting member 3 in the axial direction x.

[0069] In some examples, the limiting member 3 has a ring structure.

[0070] Exemplarily, the gear ring 2 comprises a first base body and a second base body connected to each other, and the first base body and the second base body are arranged in the axial direction x. In the radial direction y of the gear ring 2, the projection of the first base body overlaps with the projection of the limiting member 3, and the second base body protrudes from the limiting member 3 in the axial direction x.

[0071] In some embodiments, the first limiting part 21 is arranged on the first base body.

[0072] The limiting member 3 is provided with a second limiting part 31 on the inner wall facing the gear ring 2, and the second limiting part 31 is arranged in the circumferential direction of the gear ring 2 together with the first limiting part 21. The first limiting part 21 and the second limiting part 31 are matched with each other.

[0073] In some examples, the number of the second limiting part 31 on the limiting member 3 can be one or more.

[0074] Exemplarily, the limiting member 3 comprises one second limiting part 31, and the second limiting part 31 is arranged at least one circle in the circumferential direction of the inner wall of the limiting member 3.

[0075] Exemplarily, the limiting member 3 comprises a plurality of second limiting parts 31, and the plurality of second limiting parts 31 are arranged at intervals in the circumferential direction of the inner wall of the limiting member 3.

[0076] In some examples, the structure of the second limiting part 31 comprises one or more of a groove structure, a boss structure or a shoulder structure.

[0077] In some examples, the matching mode of the first limiting part 21 and the second limiting part 31 comprises one or more of a key and a key groove matching mode, a fitting mode, a thread matching mode, a shoulder matching mode, a pin and a pin hole matching mode.

[0078] The gearbox 100 provided in this application includes a housing 1, a gear ring 2, and a limiting member 3. The gear ring 2 is fixed to the housing 1 by the limiting member 3, and the first limiting part 21 of the gear ring 2 cooperates with the second limiting part 31 of the limiting member 3. The limiting member 3 restricts the circumferential rotation of the gear ring 2. Therefore, the fixing and limiting of the gear ring 2 are concentrated on the limiting member 3. The limiting member 3 is an independent component, and its design can be tailored according to the magnitude of the torque transmission of the gear ring 2 and the magnitude of the circumferential rotation of the gear ring 2. Compared with directly limiting the gear ring 2 through the housing 1, this improves the overall adaptability and flexibility of the gearbox 100, thereby better adapting to diverse working environments and motion requirements. Moreover, the independent limiting member 3 is easier to install, disassemble, and replace, eliminating the need for large-scale disassembly and adjustment of the entire gearbox 100. This not only facilitates the installation of the gear ring 2 but also makes the gearbox 100 easier to maintain, reducing maintenance costs.

[0079] See also Figure 3 and Figure 4 , Figure 3 for Figure 2 The image shown is a radial cross-sectional view of a gearbox at point A according to an embodiment of this application; Figure 4 for Figure 2 The image shows a radial cross-sectional view of the gearbox at point B according to an embodiment of this application.

[0080] According to one embodiment of this application, such as Figures 1 to 4 As shown, the gear ring 2 also includes a third limiting portion 22, which is disposed along the axial direction x with the first limiting portion 21. The first limiting portion 21 is located on the side of the third limiting portion 22 facing the limiting member 3. In the radial direction y of the gear ring 2, the third limiting portion 22 protrudes from the first limiting portion 21. In the axial direction x, the third limiting portion 22 partially overlaps with the limiting member 3.

[0081] The gear ring 2 includes a first limiting part 21 and a third limiting part 22. The third limiting part 22 and the first limiting part 21 are arranged along the axial direction x, and the first limiting part 21 is located on the side of the third limiting part 22 facing the limiting member 3. The first limiting part 21 and the second limiting part 31 are arranged opposite to and cooperate with each other along the radial direction y of the gear ring 2.

[0082] In the radial direction y of the gear ring 2, the third limiting part 22 protrudes beyond the first limiting part 21; that is, the height of the third limiting part 22 in the radial direction y is higher than the height of the first limiting part 21 in the radial direction y. In the axial direction x, the third limiting part 22 partially overlaps with the limiting member 3. It can be understood that the third limiting part 22 cooperates with the limiting member 3 to limit the gear ring 2 in the axial direction x.

[0083] For example, the third limiting part 22 includes a boss that protrudes radially y from the first limiting part 21.

[0084] Exemplarily, the limiting member 3 partially abuts against the third limiting portion 22 along the axial direction x.

[0085] In some examples, the number of the third limiting portion 22 on the gear ring 2 can be one or more.

[0086] Exemplarily, the gear ring 2 comprises a plurality of third limiting portions 22, which are arranged along the circumference of the gear ring 2.

[0087] In some examples, the gear ring 2 comprises a plurality of first limiting portions 21 and a plurality of third limiting portions 22, which are arranged along the circumference of the gear ring 2, and the first limiting portions 21 and the third limiting portions 22 are arranged one by one.

[0088] In these optional embodiments, the third limiting portion 22 can limit the gear ring 2 in the axial direction x, reduce the excessive shaking or deviation of the gear ring 2 in the axial direction x, and also limit the gear ring 2 from slipping out of the housing 1.

[0089] According to one embodiment of the present application, as shown in Figure 1 、 Figure 3 and Figure 4 , in the axial direction x of the gear ring 2, the third limiting portion 22 and the limiting member 3 are provided with a gap.

[0090] In some examples, in the axial direction x of the gear ring 2, the end surface of the limiting member 3 in the axial direction x and the third limiting portion 22 are provided with a gap.

[0091] In these optional embodiments, the third limiting portion 22 and the limiting member 3 are provided with a gap, which allows the axial x floating of the gear ring 2 during work, realizes uniform load, and can effectively alleviate the phenomenon of uneven load.

[0092] According to one embodiment of the present application, the gear ring 2 comprises a plurality of first limiting portions 21. The limiting member 3 comprises a plurality of second limiting portions 31. The plurality of first limiting portions 21 and the plurality of second limiting portions 31 are arranged alternately along the circumference of the gear ring 2.

[0093] The gear ring 2 comprises a plurality of first limiting portions 21, which are arranged along the circumference of the gear ring 2. The limiting member 3 comprises a plurality of second limiting portions 31, which are arranged along the circumference of the gear ring 2, and the plurality of first limiting portions 21 and the plurality of second limiting portions 31 are arranged alternately.

[0094] Exemplarily, the gear ring 2 comprises N first protrusions, which are arranged along the circumference of the gear ring 2. The limiting member 3 comprises N second protrusions, which are arranged along the circumference of the gear ring 2. And the first protrusions and the second protrusions are arranged alternately.

[0095] In these optional embodiments, the ring gear 2 can uniformly disperse the torque generated by the transmission to each first limiting portion 21, and the first limiting portion 21 and the corresponding second limiting portion 31 jointly bear and transmit the force, thereby improving the stress concentration phenomenon and improving the structural stability of the ring gear 2.

[0096] According to one embodiment of the present application, as shown in Figure 1 , the key groove 23 is formed between the two adjacent first limiting portions 21, and at least part of the second limiting portion 31 is accommodated in the key groove 23, and the key groove 23 is in clearance fit with the second limiting portion 31 in the circumferential direction.

[0097] Exemplarily, the ring gear 2 includes a plurality of first key teeth arranged at intervals in the circumferential direction, the limiting member 3 includes a plurality of second key teeth arranged at intervals in the circumferential direction, the first key teeth and the second key teeth are alternately arranged, the key groove 23 is formed between the two adjacent first key teeth, and the second key teeth are accommodated in the key groove 23, and the key groove 23 is in clearance fit with the second key teeth in the circumferential direction.

[0098] In these optional embodiments, the key groove 23 is in interlocking fit and clearance fit with the second limiting portion 31, so as to realize the circumferential limiting of the ring gear 2 and the transmission of the torque. In addition, the clearance fit between the key groove 23 and the second limiting portion 31 allows the circumferential floating of the ring gear 2 during the operation, thereby realizing the uniform load.

[0099] For reference, Figures 5 to 7 , Figure 5 is a structural schematic view of the first limiting portion and the second limiting portion of the gearbox provided by one embodiment of the present application; Figure 6 is a structural schematic view of the first limiting portion and the second limiting portion of the gearbox provided by another embodiment of the present application; Figure 7 is a structural schematic view of the first limiting portion and the second limiting portion of the gearbox provided by still another embodiment of the present application.

[0100] According to one embodiment of the present application, as shown in Figure 1 , Figure 5 , Figure 6 and Figure 7 , the cross-sectional shape of the first limiting portion 21 in the radial direction y of the ring gear 2 is one of a rectangular shape, a trapezoidal shape, or an involute shape.

[0101] In some examples, the limiting member 3 includes a plurality of second key teeth arranged at intervals in the circumferential direction, a second key groove is formed between the two adjacent second key teeth, at least part of the second limiting portion 31 is accommodated in the second key groove, and the second key groove is in clearance fit with the second limiting portion 31 in the circumferential direction.

[0102] Exemplarily, the structure of the second key groove 23 is one of a rectangular shape, a trapezoidal shape, or an involute shape.

[0103] According to an embodiment of the present application, the second limiting part 31 has a cross-sectional shape in the radial direction y of the gear ring 2, which is one of a rectangle, a trapezoid, or an involute.

[0104] Exemplarily, the keyway 23 has a structure which is one of a rectangle, a trapezoid, or an involute.

[0105] According to an embodiment of the present application, the limiting part 3 is provided with a connecting part 32 at an end thereof away from the gear ring 2 in the radial direction y of the gear ring 2, and the connecting part 32 is used to connect the housing 1.

[0106] In some embodiments, the limiting part 3 comprises the second limiting part 3 and the connecting part 32, and the connecting part 32 is arranged at an end of the second limiting part 3 away from the gear ring 2 in the radial direction y.

[0107] Optionally, the connecting part 32 protrudes from the second limiting part 31 in the radial direction y.

[0108] In some embodiments, the connecting part 32 and the housing 1 are connected by one or more of a threaded connection, a pin connection, a key connection, a buckle connection, and a magnetic connection.

[0109] In some embodiments, the connecting part 32 can be directly connected to the housing 1, or the connecting part 32 can be connected to the housing 1 through a connecting part 4.

[0110] In some embodiments, the connecting part 32 and the second limiting part 31 can be integrally formed, or the connecting part 32 and the second limiting part 31 can be in a split structure.

[0111] In these optional embodiments, the connecting part 32 connects the limiting part 3 and the housing 1, so that the gear ring 2, the limiting part 3, and the housing 1 form an organic whole. During operation of the mechanical system, the force acting on the gear ring 2 can be more effectively transmitted to the housing 1 through the limiting part 3, thereby reducing the risk of deformation, displacement, or damage of the gear ring 2 and the limiting part 3 due to excessive force.

[0112] According to an embodiment of the present application, as shown in Figure 1 The connecting part 32 is provided with a mounting hole 33 which penetrates the connecting part 32 in the axial direction x of the gear ring 2. The transmission 100 further comprises a connecting part 4 which penetrates the mounting hole 33 and is connected to the housing 1.

[0113] In some examples, the connecting part 32 is provided with a mounting hole 33 which is a through hole, and the housing 1 is provided with a connecting hole. The connecting part 4 penetrates the mounting hole 33 and extends into the connecting hole to connect the limiting part 3 and the housing 1.

[0114] Exemplarily, the mounting hole 33 and the connecting part 4 are in a threaded connection.

[0115] In some examples, the limiting member 3 comprises a plurality of connecting portions 32, the plurality of connecting portions 32 are arranged along a circumferential direction of the limiting member 3, and each of the connecting portions is provided with at least one mounting hole 33. The number or size of the mounting portions and the number of the mounting holes 33 can be selected according to the size of the torque to be transmitted.

[0116] In these alternative embodiments, the limiting member 3 is connected to the housing 1 by cooperation of the mounting holes 33 and the connecting member 4, which facilitates mounting and dismounting of the limiting member 3 and the housing 1 and simplifies the mounting mode of the limiting member 3 and the housing 1.

[0117] According to one embodiment of the present application, as shown in Figure 1 the connecting portion 32 is provided with a positioning hole 34 penetrating through the connecting portion 32 along the axial direction x of the ring gear 2. The gearbox 100 further comprises a positioning member 5 penetrating through the positioning hole 34 and fixed to the housing 1.

[0118] In some examples, the connecting portion 32 is provided with the positioning hole 34 which is a through hole, and correspondingly, the housing 1 is provided with a pin hole, the positioning member 5 penetrates through the positioning hole 34 and extends into the pin hole.

[0119] In some examples, the limiting member 3 comprises two connecting portions 32 arranged correspondingly along the radial direction y, and the connecting portions 32 are provided with the positioning holes 34 and the mounting holes 33 arranged in a staggered manner.

[0120] Exemplarily, the positioning member 5 is a pin, and the positioning hole 34 is a pin hole.

[0121] In these alternative embodiments, during assembly of the gearbox 100, cooperation of the positioning hole 34 and the positioning member 5 can provide accurate axial x positioning of the limiting member 3, improve assembly accuracy, and also increase the connection stability of the limiting member 3 and the housing 1.

[0122] According to one embodiment of the present application, as shown in Figure 1 and Figure 3 the ring gear 2 has an end portion 24 protruding from the limiting member 3 along the axial direction x of the ring gear 2, and the end portion 24 is away from the first limiting portion 21. The housing 1 comprises a positioning portion 12, and the end portion 24 abuts against the positioning portion 12 along the axial direction x of the ring gear 2.

[0123] Exemplarily, the ring gear 2 comprises the end portion 24, the first limiting portion 21 and the third limiting portion 22 arranged in sequence along the axial direction x.

[0124] Alternatively, along the radial direction y, the third limiting portion 22 protrudes from the first limiting portion 21, and the end portion 24 is flush with the third limiting portion 22.

[0125] In some examples, the positioning portion 12 extends at least partially in a direction of the radial y towards the ring gear 2, and the end portion 24 abuts against the positioning portion 12 in the axial x of the ring gear 2. This achieves the limitation of the ring gear 2 in the axial x.

[0126] In some examples, the ring gear 2 has an end portion 24 protruding from the limiting member 3 in the axial x of the ring gear 2, and the end portion 24 is away from the first limiting portion 21. The housing 1 comprises a positioning portion 12, and the end portion 24 abuts against the positioning portion 12 in the axial x of the ring gear 2. The ring gear 2 further comprises a third limiting portion 22, and the third limiting portion 22 is arranged in the axial x with the first limiting portion 21, and the first limiting portion 21 is located on a side of the third limiting portion 22 towards the limiting member 3. In the radial y of the ring gear 2, the third limiting portion 22 protrudes from the first limiting portion 21. In the axial x, the third limiting portion 22 partially overlaps the limiting member 3. This achieves the limitation of both ends of the ring gear 2 in the axial x.

[0127] In these alternative embodiments, the positioning portion 12 is used to achieve the limitation of the ring gear 2 in the axial x.

[0128] According to one embodiment of the present application, as shown in Figure 1 、 Figure 3 and Figure 4 , the housing 1 comprises a fourth limiting portion 13, and the fourth limiting portion 13 is located on a side of the positioning portion 12 close to the ring gear 2 in the axial x, and the positioning portion 12 protrudes from the fourth limiting portion 13 in the radial y of the ring gear 2. The limiting member 3 is connected to the fourth limiting portion 13.

[0129] The housing 1 comprises the positioning portion 12 and the fourth limiting portion 13, and the positioning portion 12 and the fourth limiting portion 13 are arranged in the circumferential direction of the ring gear 2, and the positioning portion 12 protrudes from the fourth limiting portion 13 in the radial y of the ring gear 2.

[0130] In some examples, the limiting member 3 comprises a connecting portion 32. The transmission 100 comprises a connecting member 4. The connecting portion 32 is connected to the positioning portion 12 through the connecting member 4.

[0131] According to one embodiment of the present application, in the radial y of the ring gear 2, the end portion 24 and the fourth limiting portion 13 are provided with a gap.

[0132] In these alternative embodiments, the arrangement is convenient for the installation and positioning of the ring gear 2.

[0133] According to one embodiment of the present application, the limiting member 3 is integrally formed by one of stamping, casting or powder metallurgy pressing.

[0134] In a second aspect, the present application provides a vehicle comprising the transmission 100 according to the foregoing.

[0135] According to some embodiments of the present application, referring to Figures 1 to 5As shown, the application provides a gearbox 100, the gearbox 100 comprising a housing 1, a ring gear 2 and a limiting member 3.

[0136] The housing 1 has a receiving cavity 11.

[0137] The ring gear 2 is at least partially arranged in the receiving cavity 11, and the ring gear 2 is provided with a plurality of first limiting portions 21 and a plurality of third limiting portions 22. The third limiting portions 22 are arranged along the axial direction x with the first limiting portions 21, and the first limiting portions 21 are located on the side of the third limiting portions 22 facing the limiting member 3. In the radial direction y of the ring gear 2, the third limiting portions 22 protrude from the first limiting portions 21. In the axial direction x, the third limiting portions 22 partially overlap the limiting member 3. In the axial direction x of the ring gear 2, the third limiting portions 22 are provided with a gap with the limiting member 3. The cross-sectional shape of the first limiting portions 21 in the radial direction y of the ring gear 2 is rectangular. The ring gear 2 has an end portion 24 protruding from the limiting member 3 along the axial direction x of the ring gear 2, and the end portion 24 is away from the first limiting portions 21. The housing 1 comprises a positioning portion 12 and a fourth limiting portion 13, and the end portion 24 abuts against the positioning portion 12 along the axial direction x of the ring gear 2. The fourth limiting portion 13 is located on the side of the positioning portion 12 close to the ring gear 2 along the axial direction x, and the positioning portion 12 protrudes from the fourth limiting portion 13 in the radial direction y of the ring gear 2. The limiting member 3 is connected to the fourth limiting portion 13. In the radial direction y of the ring gear 2, the end portion 24 is provided with a gap with the fourth limiting portion 13.

[0138] The limiting member 3 is at least partially sleeved on the outer periphery of the ring gear 2, and the limiting member 3 is fixed to the housing 1. In the axial direction x of the ring gear 2, a part of the ring gear 2 is arranged between the housing 1 and the limiting member 3. The inner wall of the limiting member 3 facing the ring gear 2 is provided with a plurality of second limiting portions 31, and the second limiting portions 31 are arranged along the circumferential direction of the ring gear 2 with the first limiting portions 21, so that the second limiting portions 31 limit the amplitude of the rotation of the first limiting portions 21 along the circumferential direction. The plurality of first limiting portions 21 and the plurality of second limiting portions 31 are alternately arranged along the circumferential direction of the ring gear 2. The key grooves 23 are formed between the adjacent two first limiting members 3. At least part of the second limiting portions 31 is accommodated in the key grooves 23. The key grooves 23 are gap-fitted with the second limiting portions 31 in the circumferential direction. The cross-sectional shape of the second limiting portions 31 in the radial direction y of the ring gear 2 is rectangular. The limiting member 3 is provided with a connecting portion 32 at one end away from the ring gear 2 along the radial direction y of the ring gear 2, and the connecting portion 32 is used to connect the housing 1. The connecting portion 32 is provided with a mounting hole 33 and a positioning hole 34, and the mounting hole 33 and the positioning hole 34 pass through the connecting portion 32 along the axial direction. The gearbox 100 further comprises a connecting member 4 and a positioning member 5. The connecting member 4 passes through the mounting hole 33 and is connected to the housing 1. The positioning member 5 passes through the positioning hole 34 and is fixed to the housing 1.

[0139] Although the present application has been described with reference to preferred embodiments, it is to be understood that various modifications can change the scope of the present application to the full extent the equivalent thereof are intended to be within this application, and that each of the technical features mentioned in the various embodiments can be combined in an arbitrary manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A gearbox, characterized in that, include: The shell has a receiving cavity; A toothed ring is at least partially disposed within the receiving cavity, and a first limiting portion is provided on the outer periphery of the toothed ring; A limiting member is at least partially sleeved on the outer periphery of the gear ring. The limiting member is fixed to the housing. A portion of the gear ring is disposed between the housing and the limiting member in the axial direction of the gear ring. The limiting member has a second limiting portion facing the inner wall of the gear ring. The second limiting portion and the first limiting portion are arranged along the circumference of the gear ring so that the second limiting portion restricts the range of rotation of the first limiting portion along the circumference.

2. The gearbox according to claim 1, characterized in that, The gear ring further includes a third limiting part, which is arranged along the axial direction with the first limiting part, and the first limiting part is located on the side of the third limiting part facing the limiting member; In the radial direction of the gear ring, the third limiting portion protrudes beyond the first limiting portion; In the axial direction, the third limiting portion partially overlaps with the limiting member.

3. The gearbox according to claim 2, characterized in that, In the axial direction, the third limiting part and the limiting member are provided with a gap.

4. The gearbox according to claim 1, characterized in that, The gear ring includes a plurality of the first limiting portions; The limiting member includes a plurality of second limiting parts; Multiple first limiting portions and multiple second limiting portions are alternately arranged along the circumference of the gear ring.

5. The gearbox according to claim 4, characterized in that, A keyway is formed between two adjacent first limiting portions, and at least a portion of the second limiting portion is accommodated in the keyway, wherein the keyway is clearance-fitted with the second limiting portion in the circumferential direction.

6. The gearbox according to claim 1, characterized in that, The first limiting part has a cross-sectional shape in the radial direction of the gear ring that is rectangular, trapezoidal, or involute; and / or, The second limiting part has a cross-sectional shape in the radial direction of the gear ring that is rectangular, trapezoidal, or involute.

7. The gearbox according to claim 1, characterized in that, The limiting member has a connecting portion at one end of the toothed ring that is radially away from the toothed ring, and the connecting portion is used to connect to the housing.

8. The gearbox according to claim 7, characterized in that, The connecting part is provided with a mounting hole, which extends through the connecting part along the axial direction; The gearbox also includes a connector that passes through the mounting hole and is connected to the housing.

9. The gearbox according to claim 7, characterized in that, The connecting part is provided with a positioning hole, which extends through the connecting part along the axial direction; The gearbox also includes a positioning element that passes through the positioning hole and is fixed to the housing.

10. The gearbox according to claim 1, characterized in that, The gear ring has an end that protrudes from the limiting member along the axial direction, and the end is away from the first limiting portion; The housing includes a positioning part, and the end abuts against the positioning part along the axial direction.

11. The gearbox according to claim 10, characterized in that, The housing includes a fourth limiting part, which is located on the side of the positioning part close to the gear ring along the axial direction. In the radial direction of the gear ring, the positioning part protrudes from the fourth limiting part. The limiting member is connected to the fourth limiting part.

12. The gearbox according to claim 11, characterized in that, In the radial direction, there is a gap between the end portion and the fourth limiting portion.

13. A vehicle, characterized in that, It includes multiple gearboxes as described in any one of claims 1 to 12.

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