A double-drive rack bogie assembly

Abstract

The present invention relates to a dual-drive rack bogie assembly, comprising a frame, two sets of wheels, each set of wheels is connected by a rotating shaft, a primary suspension and a secondary suspension are arranged on the frame, a driving assembly is arranged on the rotating shaft of at least one set of wheels, the frame comprises two parallel side beams, a fixed beam and a traction beam, the fixed beam divides the area between the two side beams into a first area and a second area, the driving assembly is arranged in the first area and / or the second area; the driving assembly comprises a motor arranged on the fixed beam, a gear box arranged on the motor output shaft and the rotating shaft, a rack wheel arranged on the rotating shaft and a clutch, the clutch can realize the separation or engagement of the rack wheel and the rotating shaft, and the gear box is connected to the fixed beam through a swinging assembly. The structural reliability is significantly improved, and the inspection and maintenance are easy and low-cost, which can effectively reduce the manufacturing cost of the vehicle.

Description

Technical Field

[0001] The invention relates to the technical field of rail transit bogie manufacturing, and in particular to a double-drive rack bogie assembly. Background Art

[0002] The existing rack bogies mainly include pure rack drive bogies, bogies with integrated clutch devices inside the gearbox that can switch between rack and adhesion drive modes, and bogies with rack and adhesion drive modes on the same bogie, but with different speed ratios for rack and adhesion. Single rack drive bogies can only run on rack sections. If they need to run on adhesion sections, they need to be used in conjunction with adhesion bogies. The integrated clutch device inside the gearbox makes the gearbox structure complex, reduces system reliability and has a high failure rate. Rack bogies with two transmission ratios will make the gearbox structure more complex, further reducing system reliability and increasing costs. At the same time, traditional rack brake devices generally use belt brakes, which have a complex structure, a large structure, and a large weight. At the same time, the thermal capacity of the brake is low, and there is a phenomenon of insufficient thermal capacity for long-term downhill conditions.

[0003] Most existing frames are made of steel plate welded structures. Since the number of parts in steel plate welded structures is large, the parts need to be cut, machined, bent and other processes to complete the cutting. Welding deformation is easy to occur during welding. Therefore, in order to ensure the accurate size of the installation interface of the frame, the process level is very high. It is necessary to design special tooling to ensure the accuracy requirements, which is costly. At the same time, the allowable stress at the weld of the welded frame is low and does not meet the stress strength requirements. In order to meet the strength requirements, it is generally necessary to increase the thickness or size of the material, so the weight of the frame is large.

[0004] The existing traction method generally adopts a single traction rod or a double traction rod structure. To ensure performance, the single traction rod structure has requirements on the rod length, so the longitudinal space requirement of the traction rod is relatively large. The double traction rod structure has a large number of parts and a complex structure, and occupies a large space on the beam. At the same time, it is expensive and difficult to install. There is also a double traction rod structure on the outside of the frame. The traction device of this structure needs to be equipped with a synchronous connecting rod structure on both sides. The structure is complex and large, which is not conducive to weight reduction and has high cost. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a dual-drive rack bogie assembly with a simple structure and reliable performance. The bogie assembly is characterized by having a rack-and-rail adhesion hybrid drive structure.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a dual-drive rack bogie assembly, including a frame, two groups of wheel pairs installed on the frame, each group of the wheel pairs is connected by a rotating shaft, a primary suspension and a secondary suspension are arranged on the frame, the primary suspension includes a steel spring and a vertical shock absorber between the frame and the rotating shaft, the secondary suspension includes an air spring, an anti-snake shock absorber and an anti-roll torsion bar device arranged between the frame and the car body, a driving assembly is arranged on the rotating shaft of at least one group of the wheel pairs, the frame includes two parallel side beams, a fixed beam located between the two side beams and a traction beam arranged on the fixed beam, the fixed beam divides the area between the two side beams into a first area and a second area, and the driving assembly is arranged in the first area and / or the second area; the driving assembly includes a motor arranged on the fixed beam, a gear box arranged on the motor output shaft and the rotating shaft, a rack wheel arranged on the rotating shaft and a clutch, the clutch can realize the separation or engagement of the rack wheel and the rotating shaft, and the gear box is connected to the fixed beam through a swinging assembly.

[0007] More specifically, a supporting cross beam is connected between the two side beam ends.

[0008] More specifically, a brake group is arranged on the supporting crossbeam, and the brake group acts on the wheelset.

[0009] To be more specific, the side beam includes a first side panel, a second side panel, a top panel and a bottom panel, the first side panel and the second side panel are arranged in parallel, the top panel spans the top of the first side panel and the second side panel, and the bottom panel spans the bottom of the first side panel and the second side panel; the first side panel and the second side panel both include a horizontal section and an upwardly inclined section connected to both sides of the horizontal section, and the top panel located at the horizontal section forms an air spring mounting seat for installing an air spring; vertical shock absorber mounting seats are arranged at both ends of the side beam, and a steel spring mounting seat is arranged on the side beam next to the vertical shock absorber mounting seat.

[0010] More specifically, a swivel arm positioning seat is formed by extending downward from the inclined section, and the swivel arm positioning seat includes two positioning arms extending downward from the inclined section. Pin holes are provided on the two positioning arms, and the pin holes are used to install the swivel arms. The swivel arms are installed on the rotating shaft and can rotate around the rotating shaft.

[0011] To be more specific, the fixed beam includes a first beam side plate, a second beam side plate, a beam top plate and a beam bottom plate, the beam top plate spans the top of the first beam side plate and the second beam side plate, the beam bottom plate spans the bottom of the first beam side plate and the second beam side plate, a motor upper seat is arranged at a position of the beam top plate close to the first beam side plate, a motor lower seat is arranged at a position of the beam bottom plate close to the first beam side plate, the motor upper seat and the motor lower seat are used to fix the motor, and a gear box hanger is arranged on the first beam side plate; traction beam openings are arranged at positions opposite to the beam top plate and the beam bottom plate, and a lateral shock absorber seat is arranged at the bottom of the beam bottom plate; lateral stop seats are arranged on the beam top plates on both sides of the traction beam openings, and lateral stops are arranged on the lateral stop seats.

[0012] More specifically, the swing assembly is a swing rod, one end of which is rotatably connected to the gear box hanger, and the other end of which is rotatably connected to the gear box.

[0013] More specifically, the traction beam includes a vertically arranged traction main beam, a traction fixing plate arranged on the top of the traction main beam, and a traction connecting piece arranged on the bottom of the traction main beam, the traction connecting piece is connected to a lateral vibration damper, and the lateral vibration damper is connected to a fixed cross beam.

[0014] More specifically, traction support beams are provided on both sides of the traction main beam, and transverse stop plates are provided on the traction support beams, and the transverse stop plates cooperate with the transverse stops; the traction connecting piece includes a rotating part connected to the transverse shock absorber and a movable part connected to the traction beam; an inverted T-shaped connecting piece is provided at the bottom of the traction beam, the movable part is an inverted T-shaped connecting groove, and the inverted T-shaped connecting piece is provided in the inverted T-shaped connecting groove and can slide therein.

[0015] More specifically, the gearbox is provided with an input shaft, which is connected to the output shaft of the motor through a coupling, and the input shaft extends away from the motor and extends out of the gearbox to form an extended end, and the gearbox is provided with a clutch brake, which cooperates with the extended end.

[0016] The beneficial effects of the present invention are:

[0017] 1. The rack wheel with clutch and motor drive can realize free switching between rack drive and motor drive; simple structure and reliable performance. The bogie assembly is characterized by a rack-rail adhesion hybrid drive structure, which is composed of a mature and reliable two-stage transmission gearbox, an independent rack wheel and a reliable external clutch. Since each component has a simple and mature structure, the structural reliability is significantly improved, and the maintenance is easy and low-cost, which can effectively reduce the manufacturing cost of the vehicle;

[0018] 2. The input shaft of the gearbox adopts a double-axle design. One side of the axle is connected to the motor shaft through a coupling, and the other side of the axle is equipped with a multi-plate friction plate hydraulic brake. It has a compact structure, light weight, and strong braking ability. The belt brake commonly used in existing rack bogies requires the installation of a large bracket and brake wheel, spring and brake lever structure, which has a complex structure and heavy weight, and relatively weak braking ability. The friction plate hydraulic brake of the gearbox input shaft weighs about 10% of the traditional belt brake method, which can significantly reduce the weight of the bogie. At the same time, it has a simple structure, convenient maintenance and low cost; BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a dual-drive rack bogie assembly of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the framework of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the side beam of the present invention;

[0022] Figure 4 yes Figure 2 A schematic diagram of the enlarged structure of part A;

[0023] Figure 5 It is a schematic diagram of the exploded structure of the rotating arm shaft, pin hole and gasket of the present invention;

[0024] Figure 6 It is a schematic cross-sectional view of the steel spring assembly of the present invention;

[0025] Figure 7 It is a structural schematic diagram of the fixed crossbeam of the present invention;

[0026] Figure 8 It is a schematic cross-sectional structural diagram of the fixed crossbeam of the present invention;

[0027] Fig. 9 It is a schematic diagram of the assembly structure of the traction beam and the lateral vibration damper of the present invention;

[0028] Fig.10 It is a structural schematic diagram of the traction connecting member of the present invention;

[0029] Fig.11 is a schematic diagram of the structure of the drive assembly of the present invention;

[0030] Fig.12 is a schematic cross-sectional structural diagram of the drive assembly of the present invention (located at the rotating shaft);

[0031] Fig.13 yes Fig.12 A schematic diagram of the enlarged structure of part B;

[0032] Fig.14 It is a schematic structural diagram of the rack wheel of the present invention.

[0033] In the figure: 100, frame; 110, side beam; 111, first side plate; 112, second side plate; 113, top plate; 114, bottom plate; 115, horizontal section; 116, inclined section; 117, air spring mounting seat; 118, vertical shock absorber mounting seat; 119, steel spring mounting seat; 1110, positioning arm; 11101, pin hole; 11102, gasket notch; 11103, first limiting edge; 11104, second limiting edge; 11105, third limiting edge; 1111, side beam support plate; 1112, anti-snake shock absorber mounting seat; 1113, supporting subbeam; 1114, supporting crossbeam mounting seat; 1115, accommodating cavity; 1 20. Fixed beam; 121. First beam side plate; 122. Second beam side plate; 123. Beam top plate; 124. Beam bottom plate; 125. Motor upper seat; 126. Motor lower seat; 127. Gearbox hanger; 128. Traction beam opening; 129. Transverse shock absorber seat; 1210. Transverse stop seat; 1211. Transverse stop; 1212. Traction rubber pile; 1213. Beam support plate; 130. Traction beam; 131. Traction main beam; 132. Traction fixed plate; 133. Traction connecting piece; 1331. Rotating part; 1332. Movable part; 134. Traction support beam; 135. Transverse stop plate; 140. Support beam;

[0034] 200, wheelset; 211, steel spring; 2111, inner steel spring; 2112, outer steel spring; 2113, first steel spring pad; 2114, first annular isolation belt; 2115, second steel spring pad; 2116, second annular isolation belt; 2117, vertical stop; 212, vertical shock absorber; 221, air spring; 222, anti-snake shock absorber; 223, anti-roll torsion bar device; 224, lateral shock absorber; 230, swing arm; 231, swing arm shaft; 232, gasket; 240, rotating shaft; 250, brake brake group;

[0035] 300, drive assembly; 310, motor; 320, gear box; 330, rack wheel; 331, wheel hub; 332, wheel seat; 333, wheel body; 340, clutch; 341, clutch inner sleeve; 342, clutch outer sleeve; 343, internal gear clutch plate; 344, external gear clutch plate; 345, piston; 346, piston cavity; 347, oil supply seat; 348, oil supply shell; 349, outer end cover; 3410, inner end cover; 3411, oil supply cavity; 350, clutch brake; 360, swing rod; 370, pull rod. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only 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.

[0037] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting 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.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0039] like Figure 1 A dual-drive rack bogie assembly is shown, comprising a frame 100, two groups of wheel pairs 200 mounted on the frame 100, each group of the wheel pairs 200 comprising two wheels connected by a rotating shaft 240, the wheel pairs 200 acting on a track, a primary suspension and a secondary suspension are arranged on the frame 100, the primary suspension comprising a steel spring 211 and a vertical shock absorber 212 between the frame 100 and the rotating shaft 240, the secondary suspension comprising an air spring 221, an anti-snake shock absorber 222 and an anti-roll torsion bar device 223 arranged between the frame 100 and the vehicle body, wherein a driving assembly 300 is arranged on the rotating shaft 240 of at least one group of the wheel pairs 200, the driving assembly 300 drives the rotating shaft 240 to rotate, thereby driving the wheel pairs 200 to rotate, so as to realize the running of the wheel pairs 200 on the track.

[0040] like Figure 2-Figure 3The frame 100 shown includes two parallel side beams 110, a fixed cross beam 120 located between the two side beams 110, and a traction beam 130 arranged on the fixed cross beam 120. The fixed cross beam 120 divides the area between the two side beams 110 into a first area and a second area. The frame 100 is H-shaped, and the drive assembly 300 is arranged in the first area and / or the second area.

[0041] The side beam 110 includes a first side plate 111, a second side plate 112, a top plate 113 and a bottom plate 114. The first side plate 111 and the second side plate 112 are arranged in parallel. The top plate 113 spans the top of the first side plate 111 and the second side plate 112. The bottom plate 114 spans the bottom of the first side plate 111 and the second side plate 112. The first side plate 111, the second side plate 112, the top plate 113 and the bottom plate 114 surround and form an internal cavity, which can increase the firmness and greatly reduce the weight. The first side plate 111 and the second side plate 112 are arranged in parallel. The top plate 113 spans the top of the first side plate 111 and the second side plate 112. 12 includes a horizontal section 115 and an inclined section 116 connected to both sides of the horizontal section 115 and inclined upward. The top plate of the horizontal section 115 forms an air spring mounting seat 117 for mounting an air spring 221. One end of the air spring 221 is fixed to the air spring mounting seat 117, and the other end is fixed to the vehicle body. Vertical shock absorber mounting seats 118 are arranged at both ends of the side beam 110. A steel spring mounting seat 119 is arranged on the side beam 110 next to the vertical shock absorber mounting seat 118, and extends downward from the inclined section 116 to form a rotating arm positioning seat. Figure 4 The swivel arm positioning seat shown includes two positioning arms 1110 extending downward from the inclined section 116, and the two positioning arms 1110 are each provided with a pin hole 11101, and the pin hole 11101 is used to install the swivel arm 230, and the swivel arm 230 is installed on the rotating shaft 240 and can rotate around the rotating shaft 240; one end of the vertical shock absorber 212 is fixed on the vertical shock absorber mounting seat 118, and the other end is fixed on the swivel arm 230; one end of the steel spring 211 is fixed on the steel spring mounting seat 119, and the other end is fixed on the swivel arm 230, and the force of the steel spring 211 passes through the center of the rotating shaft 240.

[0042] Among them, Figure 4 and Figure 5The pin hole 11101 is a U-shaped groove opening downward, one end of the rotating arm 230 is a rotating arm shaft 231, the rotating arm 230 can rotate around the rotating arm shaft 231, the rotating arm shaft 231 can be inserted into the pin hole 11101, a gasket notch 11102 is provided on the positioning arm 1110, the gasket notch 11102 is provided next to the pin hole 11101, a limiting notch is provided on the rotating arm shaft 231, the gasket notch 11102 and the limiting notch can accommodate the gasket 232 spanning the pin hole 11101, and the gasket notch 11102 is provided on the gasket notch 11102. A first limiting edge 11103 is provided, a second limiting edge 11104 is provided on the gasket 232, and a third limiting edge 11105 is provided on the limiting notch. When the gasket 232 is inserted into the gasket notch 11102, the second limiting edge 11104 cooperates with the first limiting edge 11103 and the third limiting edge 11105 respectively. The cooperation between the second limiting edge 11104 and the first limiting edge 11103 can prevent the gasket 232 from rotating, and the cooperation between the second limiting edge 11104 and the third limiting edge 11105 can prevent the rotating arm shaft 231 from rotating.

[0043] Furthermore, a plurality of side beam support plates 1111 are provided between the first side plate 111 and the second side plate 112 for providing support in the internal cavity thereof to ensure the rigidity of the overall side beam 110 and prevent the side beam 110 from being deformed.

[0044] The top plate 113 and the bottom plate 114 at the horizontal section 115 extend toward a side away from the fixed cross beam 120 to form an extended end, and an anti-snake shock absorber mounting seat 1112 is arranged between the two extended ends. The anti-snake shock absorber mounting seat 1112 is used to install the anti-snake shock absorber 222; a support member is arranged between the two extended ends to improve the strength.

[0045] Furthermore, the top plate 113 and the bottom plate 114 at the horizontal section 115 extend toward the side close to the fixed beam 120 to form a welding interface, and the welding interface is welded to the fixed beam 120 and welded together by two circumferential welds, thereby greatly improving the strength of the overall frame 100.

[0046] Further, a support auxiliary beam 1113 may be provided at the end of the side beam 110 away from the horizontal section 115. The support auxiliary beam 1113 is inclined downward. A support crossbeam mounting seat 1114 is provided at the end of the support auxiliary beam 1113 away from the horizontal section 115. A support crossbeam 140 is provided between the support crossbeam mounting seats 1114 on the opposite sides of the two side beams 110. The inclined section 116, the steel spring mounting seat 119, and the support auxiliary beam 1113 enclose a receiving cavity 1115. The receiving cavity 1115 opens downward. The wheel set 200 is received in the receiving cavity 1115 and can rotate in the receiving cavity 1115. A brake braking group 250 is provided on the support crossbeam 140. Four brake braking groups 250 are provided, and each is installed for braking for each wheel.

[0047] The two side beams 110, the fixed crossbeam 120, and the two support crossbeams 140 make the top view of the frame 100 in the shape of a Chinese character 'Ri' (day). The drive assembly 300 is provided in the space enclosed by the 'Ri' shape.

[0048] A sleeve with an opening facing downward is provided on the steel spring mounting seat 119. The sleeve is used to receive the steel spring 211; as Figure 6 shown, the steel spring 211 is composed of an inner steel spring 2111 and an outer steel spring 2112. A first steel spring pad 2113 is provided on the steel spring mounting seat 119. A first annular isolation belt 2114 is provided on the first steel spring pad 2113. The inner steel spring 2111 is provided inside the first annular isolation belt 2114 (i.e., the outer diameter of the inner steel spring 2111 can abut against the inner diameter of the first annular isolation belt 2114). The outer steel spring 2112 is provided outside the first annular isolation belt 2114 (i.e., the inner diameter of the outer steel spring 2112 can abut against the outer diameter of the first annular isolation belt 2114). A second steel spring pad 2115 is provided on the swing arm 230. A second annular isolation belt 2116 is provided on the second steel spring pad 2115. The inner steel spring 2111 is provided inside the second annular isolation belt 2116 (i.e., the outer diameter of the inner steel spring 2111 can abut against the inner diameter of the second annular isolation belt 2116). The outer steel spring 2112 is provided outside the second annular isolation belt 2116 (i.e., the inner diameter of the outer steel spring 2112 can abut against the outer diameter of the second annular isolation belt 2116). The outer steel spring 2112 and the inner steel spring 2111 have opposite helix directions. A vertical stop 2117 is provided inside the inner steel spring 2111. The vertical stop 2117 has the function of vertical limit and can also ensure that the steel spring 211 does not deviate from its position.

[0049] As Figure 7 shown in Figure 8The fixed beam 120 shown in the figure includes a first beam side plate 121, a second beam side plate 122, a beam top plate 123 and a beam bottom plate 124, the beam top plate 123 spans the top of the first beam side plate 121 and the second beam side plate 122, the beam bottom plate 124 spans the bottom of the first beam side plate 121 and the second beam side plate 122, the first beam side plate 121, the second beam side plate 122, the beam top plate 123 and the beam bottom plate 124 form a The present invention relates to a hollow chamber with an internal structure, which can ensure strength while reducing weight, and is formed in one piece by casting; a motor upper seat 125 is arranged at a position of the crossbeam top plate 123 near the first crossbeam side plate 121, and a motor lower seat 126 is arranged at a position of the crossbeam bottom plate 124 near the first crossbeam side plate 121, the motor upper seat 125 and the motor lower seat 126 are used to fix the motor 310, and a gear box hanger 127 is arranged on the first crossbeam side plate 121; traction beam openings 128 are arranged at positions opposite to each other between the crossbeam top plate 123 and the crossbeam bottom plate 124, and the traction beam openings 128 are respectively arranged on the crossbeam top plate 123, and the traction beam openings 128 are also arranged on the crossbeam bottom plate 124, and the two traction beam openings 128 are arranged opposite to each other, and the traction beam 130 can be inserted into the fixed crossbeam 120 from above the fixed crossbeam 120 through the traction beam opening 128 and extend from below the fixed crossbeam 120, and a transverse A shock absorber seat 129 is provided with a lateral shock absorber 224, which is placed left and right and fixed on the traction beam 130, so as to reduce the vibration of the traction beam 130 in the left and right directions; a lateral stop seat 1210 is provided on the cross beam top plate 123 on both sides of the traction beam opening 128, and a lateral stop 1211 is provided on the lateral stop seat 1210, and the lateral stop 1211 realizes the limitation in the left and right directions.

[0050] When installing the motor 310, it is necessary to quickly position it and fix it conveniently. The mounting surface of the motor lower seat 126 is vertically arranged, and the mounting surface of the motor upper seat 125 is horizontally arranged. An outward positioning protrusion is arranged on the mounting surface of the motor upper seat 125, and a corresponding outer groove is formed inwardly at the position where the motor 310 and the motor upper seat 125 cooperate. The positioning protrusion is inserted into the positioning groove. Through the cooperation between the positioning protrusion and the positioning groove, the motor installation position can be easily found, and the motor can be quickly installed to improve efficiency and be relatively stable.

[0051] A plurality of beam support plates 1213 are arranged in the cavity formed by the first beam side plate 121, the second beam side plate 122, the beam top plate 123 and the beam bottom plate 124. The plurality of beam support plates 1213 are divided into two groups and are respectively arranged on both sides of the traction beam opening 128. In this embodiment, there are two beam support plates 1213 and they are respectively located on both sides of the traction beam opening 128. The beam support plates 1213 are perpendicular to the first beam side plate 121, the second beam side plate 122, the beam top plate 123 and the beam bottom plate 124. A traction rubber pile seat plate is provided on the side wall in the traction beam opening 128, and a traction rubber pile 1212 is provided on the traction rubber pile seat plate. A contact surface that contacts the traction rubber pile is provided on the corresponding traction beam 130 inserted into the traction beam opening 128. When the wheelset 200 drives the fixed crossbeam 120 in the frame 100 to move forward, the traction rubber pile 1212 contacts the contact surface and pushes the traction beam 130 to move forward. One or two traction rubber pile seat plates can be provided. When two are provided, they are provided on two opposite side walls in the traction beam opening 128.

[0052] like Fig. 9 The traction beam 130 shown includes a vertically arranged traction main beam 131, a traction fixing plate 132 arranged at the top of the traction main beam 131, and a traction connecting member 133 arranged at the bottom of the traction main beam 131, the traction connecting member 133 is connected to the lateral shock absorber 224, the traction fixing plate 132 is fixed on the vehicle body, traction support beams 134 are arranged on both sides of the traction main beam 131, and a lateral stop plate 135 is arranged on the traction support beam 134, and the lateral stop plate 135 cooperates with the lateral stop 1211 on the fixed cross beam 120 to limit the left and right movement position of the traction beam 130.

[0053] like Fig.10 The traction connection member 133 shown includes a rotating portion 1331 connected to the lateral shock absorber 224 and a movable portion 1332 connected to the traction beam 130. The movable portion 1332 can move forward and backward relative to the traction beam 130, that is, when moving forward or braking, the traction beam 130 will move backward or forward due to acceleration or inertia. The setting of the movable portion 1332 can ensure that the forward and backward movement of the traction beam 130 will not affect the lateral shock absorbers 224 set on the left and right.

[0054] Furthermore, an inverted T-shaped connector is provided at the bottom of the traction beam 130, and the movable portion 1332 is an inverted T-shaped connecting groove. The inverted T-shaped connector and the inverted T-shaped connecting groove are arranged along the front-to-back direction. The inverted T-shaped connector is provided in the inverted T-shaped connecting groove and can slide therein. When moving forward or braking, the sliding between the two can eliminate the impact on the lateral shock absorber 224, thereby protecting the lateral shock absorber 224 and increasing its service life.

[0055] like Fig.11 and Fig.12 The driving assembly 300 shown includes a motor 310 disposed on the fixed beam 120, a gear box 320 disposed on the motor output shaft and the rotating shaft 240, a rack wheel 330 disposed on the rotating shaft 240, and a clutch 340, wherein the clutch 340 can separate or engage the rack wheel 330 with the rotating shaft 240, and the gear box 320 is connected to the fixed beam 120 through a swing assembly. The motor 310 transmits power to the rotating shaft 240 through the gear box 320 and drives the wheelset 200 to rotate through the rotating shaft 240.

[0056] The driving assembly 300 can realize two driving modes. The first one is that when the clutch 340 is in a disengaged state, the rack wheel 330 and the rotating shaft 240 move relative to each other, that is, the rotating shaft 240 will not rotate with the rack wheel 330. At this time, the rotating shaft 240 is driven to rotate by the motor 310 and the gear box 320. The second one is that when the clutch 340 is in an engaged state, the rack wheel 330 can drive the rotating shaft 240 to rotate, and the motor 310 and the gear box 320 are not working.

[0057] Among them, Fig.13The clutch 340 shown in the figure includes a clutch inner sleeve 341 fixed to the rotating shaft 240, a clutch outer sleeve 342 sleeved on the outside of the clutch inner sleeve 341, an inner-tooth clutch plate 343 matched with the clutch inner sleeve 341, an outer-tooth clutch plate 344 matched with the clutch outer sleeve 342, and a clutch control component for pushing the inner-tooth clutch plate 343 to contact the outer-tooth clutch plate 344. The clutch outer sleeve 342 is fixed on the rack wheel 330, and the outer-tooth clutch plate 344 transmits the driving force of the clutch outer sleeve 342 to the clutch inner sleeve 341 by friction, and then transmits it through the clutch inner sleeve 341. to the rotating shaft 240, thereby driving the rotation of the wheelset 200; the clutch control assembly includes a piston 345 arranged on one side of the clutch 340, the piston 345 is used to control the contact and separation of the internal clutch plate 343 and the external clutch plate 344, and a piston chamber 346 is arranged on the side of the piston away from the internal clutch plate 343, the piston chamber 346 is surrounded by a clutch inner sleeve 341, a clutch outer sleeve 342, a piston 345 and an end cover arranged at the end of the clutch 340; hydraulic oil is introduced into the piston chamber 346 to control the movement of the piston 345, when the internal clutch When the device plate 343 contacts the external tooth clutch plate 344, the two transmit the external driving force to the rotating shaft 240 through friction; an oil supply device is arranged next to the clutch 340, and the oil supply device includes an oil supply seat 347 sleeved on the rotating shaft 240, an oil supply shell 348 sleeved on the oil supply seat 347, an inner end cover 3410 and an outer end cover 349 arranged on both sides of the oil supply seat 347, bearings are arranged between the inner end cover 3410 and the oil supply seat 347 and between the outer end cover 349 and the oil supply seat 347, an oil supply cavity 3411 is arranged between the oil supply seat 347 and the oil supply shell 348, and the oil supply outer cover 349 is arranged on both sides of the oil supply seat 347. The shell 348 is fixed to the frame 100 by a pull rod 370, and the oil supply seat 347 can rotate relative to the oil supply shell 348. An oil supply hole is arranged on the oil supply shell 348. The oil supply hole is connected to an oil pipe to supply hydraulic oil to the oil supply chamber 3411. An oil supply channel is arranged inside the oil supply seat 347 and connected to the piston chamber 346. The clutch 340 is engaged by adding hydraulic oil from the outside to the inside, and the clutch 340 is disengaged by extracting the hydraulic oil from the outside. The use of hydraulic oil can make the clutch 340 flexible during use, reduce rigid contact, and have better buffering performance.

[0058] The gearbox 320 includes a housing, an input shaft, a first gear, a second gear and a third gear, wherein the first gear, the second gear and the third gear are arranged in the housing, the first gear is arranged on the input shaft, the input shaft is connected to the output shaft of the motor 310 through a coupling, the third gear is fixed on the rotating shaft 240, the second gear is meshed with the first gear and the third gear respectively, and the power entering the input shaft can be transmitted to the rotating shaft 240; wherein the second gear includes a first tooth shape and a second tooth shape, the first tooth shape is meshed with the first gear, and the second tooth shape is meshed with the third gear; the input shaft extends in a direction away from the motor 310 and extends out of the gearbox to form an extended end, and a clutch brake 350 is fixed on the gearbox, the clutch brake 350 cooperates with the extended end, and when braking is required, the clutch brake 350 locks the extended end to limit the rotation of the first gear, thereby limiting the rotation of the rotating shaft 240, thereby achieving the purpose of braking.

[0059] The swing assembly includes a swing rod 360, and a swing rod mounting seat is arranged on the gear box 320. One end of the swing rod 360 is connected to the swing rod mounting seat through a pin shaft, and the other end of the swing rod 360 is connected to the gear box hanger 127 through a pin shaft. The swing rod 360 is used to buffer the impact of starting and braking on the gear box 320; at the same time, a limit plate is arranged on the side of the gear box 320 close to the fixed beam 120. When the swing rod 360 swings too much, the limit plate can limit the swing amplitude.

[0060] like Fig.13 and Fig.14 The rack wheel 330 shown includes a wheel hub 331, a wheel seat 332 arranged on the wheel hub 331, and a wheel body 333 arranged on the wheel seat 332. A bearing is arranged between the wheel hub 331 and the rotating shaft 240. The wheel hub 331 is fixed together with a clutch sleeve 342. The wheel hub 331 can transmit power to the rotating shaft 240 through the clutch 340.

[0061] In order to further protect the rack wheel 330 and extend its service life, it is necessary to have a flexible connection when it is started, so the wheel hub 331 extends outward in the radial direction to form a plurality of wheel hub teeth, and the plurality of wheel hub teeth are evenly distributed, and the wheel seat 332 extends inward in the radial direction to form a plurality of wheel seat teeth, and the plurality of wheel seat teeth are evenly distributed; the wheel hub teeth and the wheel seat teeth are inserted into each other at intervals, that is, each of the wheel hub teeth is inserted between two wheel seat teeth, and each of the wheel seat teeth is inserted between two wheel hub teeth; at the same time, rubber vibration dampers are filled between the wheel hub teeth and the wheel seat teeth; the rubber vibration dampers cover the space formed between the wheel hub 331 and the wheel seat 332; when the rack wheel 330 is used as the power, the power transmission needs to pass through the rubber vibration dampers before being transmitted to the wheel hub 331, thereby eliminating rigid starting and being able to well protect the rack wheel 330.

[0062] In summary, the present invention can simultaneously adopt motor drive and rack drive, and has carried out reasonable structural design, which greatly reduces the volume of the overall structure and can realize free switching of the two drives; the clutch 340 is driven by hydraulic oil to improve the reliability of the clutch; through the design of the rack wheel 330 structure, the stiffness of rigid starting is eliminated and the comfort level is improved; the swing structure design of the gear box 320 has a good buffering effect, prevents rigid impact, and has a good protective effect. The weight of the friction plate hydraulic brake of the input shaft of the gear box 320 is about 10% of the traditional belt brake method, which can significantly reduce the weight of the bogie assembly. At the same time, the structure is simple, easy to repair and maintain, and the cost is low.

[0063] It should be emphasized that the above are only preferred embodiments of the present invention and do not limit the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A dual-drive rack bogie assembly, comprising a frame (100), two groups of wheel pairs (200) mounted on the frame (100), each group of the wheel pairs (200) being connected via a rotating shaft (240), a primary suspension and a secondary suspension being arranged on the frame (100), the primary suspension comprising a steel spring (211) and a vertical damper (212) between the frame (100) and the rotating shaft (240), and the secondary suspension comprising an air spring (221), an anti-snaking damper (222) and an anti-roll torsion bar device (223) arranged between the frame (100) and the vehicle body, characterized in that: A driving assembly (300) is arranged on the rotating shaft (240) of at least one set of the wheel pairs (200); the frame (100) comprises two side beams (110) arranged in parallel, a fixed crossbeam (120) located between the two side beams (110), and a traction beam (130) arranged on the fixed crossbeam (120); the fixed crossbeam (120) divides the area between the two side beams (110) into a first area and a second area; the driving assembly (300) is arranged in the first area and / or In the second zone, the driving assembly (300) includes a motor (310) disposed on the fixed beam (120), a gear box (320) disposed on the motor output shaft and the rotating shaft (240), a rack wheel (330) disposed on the rotating shaft (240), and a clutch (340), wherein the clutch (340) can realize the separation or engagement of the rack wheel (330) and the rotating shaft (240), and the gear box (320) is connected to the fixed beam (120) via a swing assembly; The side beam (110) comprises a first side plate (111), a second side plate (112), a top plate (113) and a bottom plate (114); the first side plate (111) and the second side plate (112) are arranged in parallel; the top plate (113) spans the top of the first side plate (111) and the second side plate (112); the bottom plate (114) spans the bottom of the first side plate (111) and the second side plate (112); (112) each comprises a horizontal section (115) and an upwardly inclined section (116) connected to both sides of the horizontal section (115); an air spring mounting seat (117) for mounting an air spring (221) is formed on the top plate of the horizontal section (115); vertical shock absorber mounting seats (118) are arranged at both ends of the side beam (110); and a steel spring mounting seat (119) is arranged on the side beam (110) next to the vertical shock absorber mounting seat (118); The fixed crossbeam (120) comprises a first crossbeam side plate (121), a second crossbeam side plate (122), a crossbeam top plate (123) and a crossbeam bottom plate (124); the crossbeam top plate (123) spans the top of the first crossbeam side plate (121) and the second crossbeam side plate (122); the crossbeam bottom plate (124) spans the bottom of the first crossbeam side plate (121) and the second crossbeam side plate (122); a motor upper seat (125) is arranged at a position of the crossbeam top plate (123) close to the first crossbeam side plate (121); and a motor lower seat (125) is arranged at a position of the crossbeam bottom plate (124) close to the first crossbeam side plate (121). The motor upper seat (125) and the motor lower seat (126) are used to fix the motor (310); a gear box hanger (127) is arranged on the first crossbeam side plate (121); traction beam openings (128) are arranged at positions where the crossbeam top plate (123) and the crossbeam bottom plate (124) are opposite to each other, and a transverse shock absorber seat (129) is arranged at the bottom of the crossbeam bottom plate (124); transverse stop seats (1210) are arranged on the crossbeam top plate (123) on both sides of the traction beam opening (128), and transverse stops (1211) are arranged on the transverse stop seats (1210).

2. The dual-drive rack bogie assembly according to claim 1, characterized in that: A supporting crossbeam (140) is connected between the ends of the two side beams (110).

3. The dual-drive rack bogie assembly according to claim 2, characterized in that: A brake assembly (250) is arranged on the supporting crossbeam (140), and the brake assembly (250) acts on the wheelset (200).

4. The dual-drive rack bogie assembly according to claim 1, characterized in that: The inclined section (116) extends downward to form a rotating arm positioning seat, and the rotating arm positioning seat includes two positioning arms (1110) extending downward from the inclined section (116). The two positioning arms (1110) are both provided with pin holes (11101), and the pin holes (11101) are used to install a rotating arm (230). The rotating arm (230) is installed on the rotating shaft (240) and can rotate around the rotating shaft (240).

5. The dual-drive rack bogie assembly according to claim 1, characterized in that: The swing assembly is a swing rod (360), one end of which is rotatably connected to the gear box hanger (127), and the other end of which is rotatably connected to the gear box (320).

6. The dual-drive rack bogie assembly according to claim 1, characterized in that: The traction beam (130) comprises a vertically arranged traction main beam (131), a traction fixing plate (132) arranged at the top of the traction main beam (131), and a traction connecting member (133) arranged at the bottom of the traction main beam (131); the traction connecting member (133) is connected to a lateral vibration damper (224); and the lateral vibration damper (224) is connected to a fixed cross beam (120).

7. The dual-drive rack bogie assembly according to claim 6, characterized in that: Traction support beams (134) are arranged on both sides of the traction main beam (131), and a transverse stop plate (135) is arranged on the traction support beam (134), and the transverse stop plate (135) cooperates with the transverse stop (1211); the traction connecting member (133) comprises a rotating part (1331) connected to the transverse damper (224) and a movable part (1332) connected to the traction beam (130); an inverted T-shaped connecting member is arranged at the bottom of the traction beam (130), and the movable part (1332) is an inverted T-shaped connecting groove, and the inverted T-shaped connecting member is arranged in the inverted T-shaped connecting groove and can slide therein.

8. The dual-drive rack bogie assembly according to claim 1, characterized in that: The gear box (320) is provided with an input shaft, the input shaft is connected to the output shaft of the motor (310) via a coupling, the input shaft extends in a direction away from the motor (310) and extends out of the gear box (320) to form an extended end, and the gear box (320) is provided with a clutch brake (350), the clutch brake (350) cooperates with the extended end.

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