Gear box separating structure, gear box and rail vehicle

Abstract

The invention relates to the technical field of rail train gearboxes, in particular to a gearbox separating structure, a gearbox and a rail vehicle, the gearbox separating structure comprises a box body and a box cover, one side of the box body is provided with a box separating face, one side of the box cover is provided with a cover sealing face used for being connected with the box separating face, and in the state that the box cover is connected with the box body, the cover sealing face is attached to the box separating face; the box cover can bear bending moment from the box body and provide bending moment resistance force in the direction of the box separating face for the box body. Thus, the box cover supports the box body from one side of the box body, the strength of the box body is improved, the bending moment bearing capacity of the gear box is enhanced, then the gear box can be subjected to integrated improvement, the wheel pair structure is optimized, and stability of a vehicle driving system and lightweight design of a vehicle bogie are facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of rail vehicle gearboxes, and in particular to a gearbox sub-box structure, a gearbox and a rail vehicle. Background Art

[0002] The axle (also known as the gearbox core shaft) used in the bogie of a rail transit EMU must withstand bending loads while achieving torque transmission. Since the axle is directly connected to the gearbox, the gearbox mainly functions to transmit torque and does not have the ability to bear loads. It is easily deformed by bending moments, which affects the stability of the gearbox and is not conducive to the normal operation of the gearbox. In addition, the dividing surface of the integral box body is mainly arranged on the upper part of the box body. The dividing method only realizes the convenience of assembly or maintenance, but cannot increase the vertical load-bearing capacity of the box body, and needs further improvement. Summary of the invention

[0003] The present invention provides a gearbox sub-box structure, a gearbox and a rail vehicle, which are used to solve the defect of poor bending moment resistance of the gearbox in the prior art and realize the integration of the bearing and transmission functions of the gearbox.

[0004] The present invention provides a gear box sub-box structure, comprising:

[0005] A box body, one side of which has a box dividing surface;

[0006] A box cover, one side of which has a sealing surface, and the sealing surface is suitable for connecting with the box dividing surface;

[0007] When the box cover is connected to the box body, the sealing surface fits the box sub-surface, and the box cover is suitable for bearing the bending moment from the box body and providing the box body with anti-bending moment force along the direction of the box sub-surface.

[0008] According to the gearbox sub-box structure provided by the present invention, the box body has a first mounting part and a second mounting part, the first mounting part is provided with a large gear for connecting to the core shaft, the second mounting part is provided with a small gear for connecting to the input shaft, the first mounting part is larger than the second mounting part, and the sub-box surface is provided at the first mounting part.

[0009] According to the gear box sub-box structure provided by the present invention, the sub-box surface is arranged at a position close to the core axis of the box body, the inner side of the box cover has an avoidance groove for avoiding the large gear, and the box cover has reinforcement blocks extending into the box body at positions at both ends of the avoidance groove, and the reinforcement blocks are against the inner surface of the box body.

[0010] The present invention also provides a gear box, comprising:

[0011] The gearbox sub-box structure as described above;

[0012] A gear set is arranged in the box;

[0013] An input shaft connected to an input end of the gear set;

[0014] A core shaft connected to an output end of the gear set;

[0015] A shaft sleeve is sleeved on the core shaft and connected to the box body, and the shaft sleeve is suitable for bearing the bending moment from the box body from an adjacent side of the box dividing surface.

[0016] According to the gear box provided by the present invention, a connecting surface is provided on one side of the box body adjacent to the box dividing surface, an axial hole is opened on the connecting surface, one end of the sleeve is fitted on the connecting surface and connected to the axial hole, and the sleeve is suitable for providing the box body with anti-bending moment force along the direction of the connecting surface.

[0017] According to the gear box provided by the present invention, the connecting surface is perpendicular to the box dividing surface.

[0018] According to the gear box provided by the present invention, one end of the sleeve has a sleeve connecting end, the sleeve connecting end is rectangular, and the connecting surface and the sleeve connecting end are both perpendicular to the core shaft.

[0019] According to the gearbox provided by the present invention, the cross-sectional area of ​​the sleeve gradually increases from the end of the sleeve close to the wheelset to the connecting end of the sleeve, and a mounting seat for mounting the motor is provided on the sleeve.

[0020] According to the gear box provided by the present invention, the connecting surfaces are respectively provided on opposite sides of the box body, each connecting surface is correspondingly connected to a sleeve, the core shaft passes through the box body, and the two sleeves are respectively sleeved on the core shaft outside the box body.

[0021] The present invention also provides a rail vehicle comprising:

[0022] Vehicle body;

[0023] A bogie is connected to the car body, and the bogie is provided with the gear box as described above.

[0024] The gearbox sub-box structure provided by the present invention is provided with a sub-box surface on one side of the box body, and a sealing surface for connecting the sub-box surface is provided on one side of the box cover. When the box cover is connected to the box body, the sealing surface fits with the sub-box surface, and the box cover can bear the bending moment from the box body and provide the box body with a bending moment resistance force along the direction of the sub-box surface. In this way, the box cover provides support to the box body from one side of the box body, increases the strength of the box body, and enhances the moment bearing capacity of the gearbox, thereby enabling the gearbox to be integrated and improved, optimizing the wheel set structure, and facilitating the stability of the vehicle drive system and the lightweight design of the vehicle bogie.

[0025] The gearbox provided by the present invention comprises the gearbox sub-box structure, gear set, input shaft, mandrel and sleeve as described above, wherein the sleeve is sleeved on the mandrel and connected to the box body, and the sleeve can bear the bending moment from the box body from the adjacent side of the sub-box surface. In this way, the box cover and the sleeve provide support to the box body from different positions of the box body, thereby increasing the strength of the box body, enhancing the bending moment bearing capacity of the gearbox, and facilitating the stability of the vehicle drive system and the lightweight design of the vehicle bogie.

[0026] The rail vehicle provided by the present invention comprises the above-mentioned gearbox, and thus also has all the advantages as mentioned above. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a schematic diagram of the shaft-side exploded structure of the gearbox provided by the present invention;

[0029] Figure 2 It is a schematic diagram of the internal structure of the gear box provided by the present invention;

[0030] Figure 3 is an appearance diagram of the gear box provided by the present invention;

[0031] Figure 4 yes Figure 3 Sectional view at AA in the middle;

[0032] Figure 5 yes Figure 3 Left view of;

[0033] Reference numerals:

[0034] 100, box body; 110, reinforcement rib; 120, box dividing surface; 130, connection surface;

[0035] 200, box cover; 210, cover surface; 220, avoidance groove; 230, reinforcement block;

[0036] 300, shaft sleeve; 310, shaft sleeve connecting end;

[0037] 400, mandrel;

[0038] 500, gear set; 510, large gear; 520, small gear;

[0039] 600. Input shaft. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0042] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0043] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0044] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0045] Combine the following Figure 1-Figure 5 Embodiments of the present invention are described.

[0046] like Figure 1 As shown, an embodiment of the present invention provides a gearbox sub-box structure, which includes a box body 100 and a box cover 200, wherein one side of the box body 100 has a sub-box surface 120, and one side of the box cover 200 has a sealing surface 210, and the sealing surface 210 can be connected to the sub-box surface 120, and fit with the sub-box surface 120 when the box cover 200 is covered with the box body 100.

[0047] When the box cover 200 is connected to the box body 100 , the cover surface 210 fits with the box sub-surface 120 , and the box cover 200 can bear the bending moment from the box body 100 and provide the box body 100 with anti-bending moment force along the direction of the box sub-surface 120 .

[0048] Since the box body 100 is a hollow structure and lacks supporting parts inside, the box body 100 is easily subjected to bending moments such as extrusion impact and is easily damaged. The box cover 200 of this embodiment is tightly connected to the box body 100 and bears the bending moment of the box body 100. Most of the extrusion impact on the box body 100 will be absorbed by the box cover 200. In this way, the box cover 200 acts as a reinforcement to provide support to the box body 100 from one side of the box body 100, and the box cover 200 increases the strength of the box body 100 and enhances the bending moment bearing capacity of the gear box, thereby enabling the gear box to be integrated and improved, optimizing the wheelset structure, and facilitating the stability of the vehicle drive system and the lightweight design of the vehicle bogie.

[0049] like Figure 1 and Figure 4 As shown, in this embodiment, the box cover 200 has a planar covering surface 210, and the covering surface 210 fits the box dividing surface 120. In this way, the connection area between the box cover 200 and the box body 100 is larger, and the box cover 200 can provide more support for the box body 100, thereby improving the strength of the box body 100.

[0050] like Figure 4As shown, in this embodiment, the box body 100 has a first mounting portion and a second mounting portion, and the first mounting portion is larger than the second mounting portion. Therefore, the first mounting portion serves as the large end of the box body 100, and the second mounting portion serves as the small end of the box body 100. The large end is the output end, and a large gear 510 for connecting to the core shaft 400 is provided in the large end. The small end is the input end, and a small gear 520 for connecting to the input shaft 600 is provided in the small end.

[0051] Preferably, the dividing surface 120 is arranged at the large end, so that the area of ​​the dividing surface 120 is larger. Similarly, the sealing surface 210 of the box cover 200 is larger. The box cover 200 provides a larger bending moment resistance to the box body 100, which can enable the box cover 200 to better support the box body 100 and further improve the bending moment bearing capacity of the gearbox.

[0052] Further, in one embodiment, if Figure 4 As shown, the dividing surface 120 is arranged at the position of the core shaft 400 close to the box body 100, that is, the dividing surface 120 is close to the center of the box body 100. Because the shape of the gearbox is close to a circle, the size of the middle part of the gearbox is larger than the size of its two ends. In this way, the area of ​​the dividing surface 120 can be further increased, and the area of ​​the sealing surface 210 of the box cover 200 is further increased. The box cover 200 provides an increased anti-bending moment force to the box body 100, and the supporting effect is more obvious, further improving the bending moment bearing capacity of the gearbox.

[0053] Specifically, Figure 3 As shown, the size of the box cover 200 is almost close to the side size of the box body 100, which can further enhance the strength of the box cover 200 and improve the bending moment resistance effect.

[0054] like Figure 4 As shown, in one embodiment, the inner side of the box cover 200 has an avoidance groove 220 for avoiding the large gear 510. Since the box cover 200 needs to be close to the middle position of the box body 100 and at the same time accommodate the packaged large gear 510, the design of the avoidance groove 220 can adapt to the position of the gear, thereby reducing the material used in the box cover 200 and reducing the weight of the gear box.

[0055] Further, in one embodiment, if Figure 4 As shown, the box cover 200 is provided with reinforcing blocks 230 at the positions at both ends of the avoidance groove 220. After the box cover 200 is installed, the reinforcing blocks 230 extend to the upper and lower ends of the box body 100. The reinforcing blocks 230 are abutted against the inner surface of the box body 100, so that the box cover 200 is more firmly connected to support the box body 100, thereby improving the structural strength of the box body 100.

[0056] like Figure 1 As shown, an embodiment of the present invention further provides a gearbox, which includes the above-mentioned gearbox sub-box structure, a gear set 500 , an input shaft 600 and a core shaft 400 .

[0057] The gearbox has a housing 100, a housing cover 200 and a sleeve 300. A gear set 500 is disposed in the housing 100, and the gear set 500 includes at least one large gear 510 and one small gear 520, the large gear 510 and the small gear 520 are meshed and connected, the small gear 520 is connected to the input shaft 600 as the input end of the gearbox, and the large gear 510 is connected to the core shaft 400 as the output end of the gearbox, and the core shaft 400 is passed through the sleeve 300 and supported by the sleeve 300.

[0058] In this embodiment, a dividing surface 120 is opened on the box body 100, so that the dividing surface 120 is located on one side of the box body 100, and a connecting surface 130 is provided on the adjacent side of the dividing surface 120. The connecting surface 130 is the axial end surface of the box body 100, and the connecting surface 130 is provided with an axial hole for installing the core shaft 400.

[0059] This embodiment also provides a shaft sleeve 300 , which is connected to the connecting surface 130 of the housing 100 . The internal through hole of the shaft sleeve 300 is connected to the shaft hole on the connecting surface 130 , and the core shaft 400 of the gear box passes through the shaft hole and extends into the shaft sleeve 300 .

[0060] In this embodiment, the bushing 300 is connected to the adjacent side of the box cover 200, the box cover 200 provides a first anti-bending moment force for the box body 100, and the bushing 300 provides a second anti-bending moment force for the box body 100. The box cover 200 and the bushing 300 provide support for the box body 100 from different positions of the box body 100, which increases the strength of the box body 100 and enhances the bending moment bearing capacity of the gearbox, which is beneficial to the stability of the vehicle drive system, can optimize the wheelset layout, and help to achieve a lightweight design of the vehicle bogie.

[0061] like Figure 1 and Figure 2 As shown, in this embodiment, one end of the sleeve 300 has a planar sleeve connecting end 310, and the sleeve connecting end 310 fits the connecting surface 130. Similarly, the connection area between the sleeve 300 and the box body 100 is large, and the sleeve 300 can provide more support for the box body 100, further improving the strength of the box body 100.

[0062] By having the box cover 200 and the shaft sleeve 300 fit the box body 100 over a larger area, the moment bearing capacity of the gear box is further improved, and the stability of the gear box is improved.

[0063] It is worth mentioning that the dividing surface 120 and the connecting surface 130 in this embodiment are preferably vertical surfaces. In the installed state, the core shaft 400 is in a horizontal state, the connecting surface 130 is vertically arranged on one side of the box body 100, and the dividing surface 120 is vertically arranged on the other side of the box body 100.

[0064] Since the gearbox is subjected to impact loads in all directions when the vehicle is running, the main gearbox is subjected to bending moment in the vertical direction due to gravity. The box cover 200 is vertically connected to one side of the box body 100, and the other side is vertically connected to the box body 100 through the shaft sleeve 300. The box cover 200 and the shaft sleeve 300 are both connected to the surface of the box body 100. The box cover 200 and the shaft sleeve 300 can provide more vertical upward supporting force for the box body 100. The supporting force is the anti-bending moment force, which can offset the bending moment received by the gearbox to a large extent, thereby improving the bending moment bearing capacity of the gearbox.

[0065] like Figure 1 As shown, in one embodiment, the box dividing surface 120 of the box body 100 is perpendicular to the connecting surface 130, and the first anti-bending moment force and the second anti-bending moment force are respectively located on two adjacent side surfaces of the box body 100. That is, the box cover 200 is arranged on a side surface parallel to the core shaft 400 or the shaft sleeve 300, and the box cover 200 is arranged adjacent to the shaft sleeve 300, and the box cover 200 and the shaft sleeve 300 support the box body 100 from two vertical directions, so that the first anti-bending moment force and the second anti-bending moment force can affect each other, thereby improving the support strength of the two sides of the box body 100, and further improving the moment bearing capacity of the gear box.

[0066] like Figure 1 As shown, in one embodiment, the sleeve connection end 310 is rectangular, and the connection surface 130 and the sleeve connection end 310 are perpendicular to the core shaft 400. The joint surface between the box 100 and the sleeve 300 is set to be rectangular, maximizing the joint surface area, which can increase the ability of the box 100 to withstand bending moments.

[0067] like Figure 1-Figure 3 As shown, in one embodiment, the cross-sectional area of ​​the sleeve 300 gradually increases from one end of the sleeve 300 close to the wheelset to the sleeve connecting end 310, that is, the sleeve 300 increases in size from one end thereof to the sleeve connecting end 310 in a flared shape, and the cross-sectional area of ​​the sleeve 300 is rectangular. The rectangular frame-shaped sleeve 300 makes the sleeve 300 have better strength and can increase the supporting force for the box body 100.

[0068] The flared end of the shaft sleeve 300 faces and is connected to the housing 100 , so as to further improve the support strength of the shaft sleeve 300 to the housing 100 and improve the moment bearing capacity of the gear box.

[0069] At the same time, the rectangular frame-shaped sleeve 300 can also be used to install other equipment to improve the functionality of the sleeve 300.

[0070] like Figure 1 As shown, in one embodiment, a mounting seat is provided on the shaft sleeve 300, and the mounting seat can be used to install equipment such as a motor to make the drive system more integrated.

[0071] like Figure 1-Figure 3 As shown, in one embodiment, two sleeves 300 are provided, and the sleeves 300 are arranged in pairs on both sides of the housing 100. Since the core shaft 400 passes through the gear box, connecting surfaces 130 are provided on both axial side surfaces of the housing 100, and the two sleeves 300 are connected to the connecting surfaces 130 one by one.

[0072] The two bushings 300 support the housing 100 from both sides, making the supporting force on the housing 100 more uniform, further improving the bending moment resistance of the housing 100. At the same time, the bushings 300 on both sides cooperate with the middle housing cover 200 to jointly support the housing 100, making the bending moment bearing capacity of the gearbox more significant.

[0073] According to the different positions of the two sides of the gear box, the shaft sleeves 300 located on the two sides of the gear box have different structures and can be adaptively designed.

[0074] The design of the two bushings 300 and the box cover 200 in this embodiment can realize the integrated load-bearing of the box body 100 and the bushing 300, realize the separation of the load-bearing and rotation functions of the gearbox, which is beneficial to the structural optimization of the wheelset and realizes the effective weight reduction of the bogie.

[0075] like Figure 5 As shown, in one embodiment, the surface of the housing 100 is further provided with additional reinforcing ribs 110, which are in the form of raised structures arranged in sequence, and can further strengthen the strength of the gearbox housing 100, improve the bearing capacity of the gearbox, and prevent the gearbox from deforming.

[0076] In this embodiment, the box cover 200 and the shaft sleeve 300 are detachably connected to the box body 100 through connecting pieces, respectively. The connecting pieces are preferably high-strength bolts.

[0077] An embodiment of the present invention further provides a rail vehicle, which includes a vehicle body and a bogie. The bogie is provided with the above-mentioned gear box, and thus also has all the advantages described above.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gear box sub-box structure, characterized in that: include: A box body, one side of which has a box dividing surface; A box cover, one side of which has a sealing surface, and the sealing surface is suitable for connecting with the box dividing surface; When the box cover is connected to the box body, the sealing surface fits the sub-box surface, and the box cover is suitable for bearing the bending moment from the box body and providing the box body with anti-bending moment force along the sub-box surface.

2. The gear box sub-box structure according to claim 1, characterized in that: The box body has a first mounting part and a second mounting part. The first mounting part is provided with a large gear for connecting to the core shaft, and the second mounting part is provided with a small gear for connecting to the input shaft. The first mounting part is larger than the second mounting part, and the box dividing surface is provided at the first mounting part.

3. The gear box sub-box structure according to claim 2, characterized in that: The box dividing surface is arranged near the core axis position of the box body, the inner side of the box cover has an avoidance groove for avoiding the large gear, and the box cover has reinforcing blocks extending into the box body at the positions at both ends of the avoidance groove, and the reinforcing blocks are against the inner surface of the box body.

4. A gear box, characterized in that: include: The gear box sub-box structure according to any one of claims 1 to 3; A gear set is arranged in the box; An input shaft connected to an input end of the gear set; A core shaft connected to an output end of the gear set; A shaft sleeve is sleeved on the core shaft and connected to the box body, and the shaft sleeve is suitable for bearing the bending moment from the box body from an adjacent side of the box dividing surface.

5. The gearbox according to claim 4, characterized in that: The box body is provided with a connecting surface on one side adjacent to the dividing surface, and an axial hole is opened on the connecting surface. One end of the sleeve fits the connecting surface and is connected to the axial hole. The sleeve is suitable for providing the box body with anti-bending moment force along the connecting surface direction.

6. The gearbox according to claim 5, characterized in that: The connecting surface is perpendicular to the box dividing surface.

7. The gearbox according to claim 5, characterized in that: One end of the sleeve has a sleeve connecting end, the sleeve connecting end is rectangular, and the connecting surface and the sleeve connecting end are both perpendicular to the core shaft.

8. The gearbox according to claim 7, characterized in that: The cross-sectional area of ​​the sleeve gradually increases from the end of the sleeve close to the wheelset to the connecting end of the sleeve, and a mounting seat for mounting the motor is provided on the sleeve.

9. The gearbox according to claim 5, characterized in that: The connecting surfaces are respectively arranged on opposite sides of the box body, each of the connecting surfaces is correspondingly connected to a sleeve, the core shaft passes through the box body, and the two sleeves are respectively sleeved on the core shaft outside the box body.

10. A rail vehicle, characterized in that: include: Vehicle body; A bogie is connected to the car body, and the bogie is provided with a gear box as described in any one of claims 4 to 9.

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