Electric power steering transmission device

Abstract

The invention belongs to the technical field of electric vehicle transmission, and discloses an electric power steering transmission device which comprises a mounting plate and a control shaft, a steering column is rotatably mounted on the surface of the mounting plate, a fixing cylinder is fixedly mounted on the surface of the mounting plate, an oil storage tank is fixedly mounted at the bottom in the fixing cylinder, and a lubricating mechanism is arranged in the oil storage tank. The lubricating mechanism comprises a piston plate, a positioning assembly and a driving assembly, an oil guide hole is formed in the surface of the piston plate, a recycling mechanism is arranged on the surface of the piston plate, the recycling mechanism comprises a sealing plate and an adjusting assembly, and the positioning assembly and the driving assembly are matched with each other, so that the piston plate can be controlled to reciprocate in an inner cavity of the oil storage tank; when the piston plate moves downwards, pressure is applied to lubricating oil in the oil storage tank, the lubricating oil penetrates through the spraying pipe and can be automatically sprayed to the surfaces of the first driven helical fluted disc and the first driving helical fluted disc, and efficient lubricating treatment can be conducted on the meshing part of the first driven helical fluted disc and the first driving helical fluted disc.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electric vehicle transmission technology, and particularly relates to an electric power-assisted steering transmission device. BACKGROUND

[0002] Electric traction vehicles are widely used in various occasions, such as postal transportation, railway transportation, airport luggage transfer, factory part transfer, automobile production assembly line part transfer, food industry article transfer and other logistics systems. Electric traction vehicles use on-board power supply as power, do not produce exhaust pollution, are very beneficial to environmental protection and air purification, are almost "zero pollution", and have a wide prospect.

[0003] The electric power-assisted steering system usually uses gear meshing for transmission. The existing steering system has a single function, and only realizes the steering function when the gear meshing transmission is used. The gear cannot be lubricated and protected, and in the long-term use process, the gear is easy to wear and tear, thereby shortening the service life of the gear. The gear parts in the steering system need to be replaced regularly, and the use effect is poor. SUMMARY

[0004] The present application aims to provide an electric power-assisted steering transmission device to solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: The utility model provides an electric power steering transmission device, including the mounting plate and control shaft, the mounting plate surface rotation is installed with the steering column, the bottom end of steering column extends to the mounting plate below and is fixedly installed with the fixed frame, the fixed frame is rotationally installed with the wheel in, the control shaft sets up above the mounting plate and is connected with the vehicle control part, the top end of steering column is fixedly installed with first driven helical tooth disc, the bottom end of control shaft is fixedly installed with first driving helical tooth disc, and first driving helical tooth disc is engagedly connected with first driven helical tooth disc, the mounting plate surface is fixedly installed with fixed cylinder, and fixed cylinder is sleeved with steering column and the outside of control shaft, the bottom of fixed cylinder is fixedly installed with oil storage tank in, and the top surface of oil storage tank is provided as open structure, the fixed cylinder lateral wall is fixedly installed with the oil injection pipe of oil storage tank intercommunication, the fixed cylinder lateral wall is fixedly installed with the spray pipe, the bottom end of spray pipe is connected with oil storage tank, the top end of spray pipe is provided with nozzle and extends to the outside of first driving helical tooth disc, the oil storage tank is provided with lubricating mechanism in, and the lubricating mechanism includes piston plate, positioning assembly and drive assembly, the piston plate is slidably installed in oil storage tank along the vertical direction, the positioning assembly is located in oil storage tank and is connected with piston plate, the drive assembly is located in oil storage tank and is connected with positioning assembly, and drive assembly is used to control piston plate reciprocating movement along the vertical direction, the piston plate surface is provided with oil guide hole, the piston plate surface is provided with recovery mechanism, and the recovery mechanism includes sealing plate and adjusting assembly, the adjusting assembly is located in the bottom wall of piston plate and is connected with sealing plate, and adjusting assembly is used to adjust the relative position of sealing plate and oil guide hole.

[0006] As a further scheme of the utility model: the positioning assembly includes the vertical rod fixedly installed on the surface of the piston plate, the top end of the vertical rod is fixedly installed with a horizontal plate, and the surface of the horizontal plate is provided with a guide groove.

[0007] As a further scheme of the utility model: the drive assembly includes a transmission column rotationally installed on the inner side wall of the oil storage tank, the one end of the transmission column towards the horizontal plate is fixedly installed with a second driven helical tooth disc, the surface of the second driven helical tooth disc is provided with a guide column deviated from the center of the circle, the guide column is inserted into the guide groove, the surface of the rotation column is fixedly installed with a second driving helical tooth disc, and the second driving helical tooth disc is engagedly connected with the second driven helical tooth disc.

[0008] As a further scheme of the utility model: the adjusting assembly includes a plurality of guide rods fixedly installed on the bottom wall of the piston plate and located outside the oil guide hole, the sealing plate is slidably installed on the surface of the plurality of guide rods, the bottom end of the guide rod is fixedly installed with an end block, the surface of the end block is fixedly installed with a compression spring, the extension end of the compression spring is surrounded outside the guide rod and connected with the sealing plate, the inner side wall of the oil storage tank is fixedly installed with a push rod, and the push rod is of L-shaped structure.

[0009] As a further scheme of the present application: the inner side wall of the oil storage tank is fixedly provided with a plurality of limiting rods, and the limiting rods are in sliding connection with the piston plate in the vertical direction.

[0010] As a further scheme of the present application: the inner side wall of the oil storage tank is fixedly provided with a U-shaped bracket, and the U-shaped bracket is in rotary connection with the transmission column.

[0011] Compared with the prior art, the present application has the beneficial effect that: when the steering column drives the wheels to adjust the direction, the positioning assembly and the driving assembly are matched to control the reciprocating movement of the piston plate in the oil storage tank cavity, the piston plate exerts pressure on the lubricating oil in the oil storage tank when moving downward, the lubricating oil can be automatically sprayed to the surface of the first driven helical gear plate and the first driving helical gear plate through the spray pipe, and the meshing part of the first driven helical gear plate and the first driving helical gear plate can be efficiently lubricated, solving the problem that the existing steering system only realizes the steering function when the gear is meshed and driven, and the gear cannot be lubricated and protected, and the gear is easily worn out during long-term use, resulting in a short service life of the gear, and the gear parts in the steering system need to be replaced regularly, which has poor use effect.

[0012] By setting the adjusting assembly and the sealing plate, the opening and closing state of the oil guide hole on the surface of the piston plate can be automatically adjusted, and the lubricating oil above the piston plate can be automatically recycled, so that the lubricating oil can be repeatedly used, and the use effect of the lubricating oil is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a perspective structural schematic view of an electric power assisted steering transmission device provided in an embodiment of the present application.

[0014] Figure 2 It is a front view structural schematic view of an electric power assisted steering transmission device provided in an embodiment of the present application.

[0015] Figure 3 It is an internal sectional view structural schematic view of a fixed cylinder in an electric power assisted steering transmission device provided in an embodiment of the present application.

[0016] Figure 4 It is an oil storage tank and its connecting structure schematic view of an electric power assisted steering transmission device provided in an embodiment of the present application. Figure 1 .

[0017] Figure 5 It is an oil storage tank and its connecting structure schematic view of an electric power assisted steering transmission device provided in an embodiment of the present application. Figure 2 .

[0018] Figure 6 It is an oil storage tank and its connecting structure schematic view of an electric power assisted steering transmission device provided in an embodiment of the present application.Figure 3 .

[0019] Figure 7 Figure 1 is a schematic view of a piston plate and its connecting structure in an electric power steering transmission device provided in an embodiment of the present application.

[0020] Wherein: 1- mounting plate, 2- steering column, 21- first driven helical gear disc, 22- fixed frame, 23- wheel, 3- control shaft, 31- first driving helical gear disc, 4- oil storage tank, 41- oil injection pipe, 42- spray pipe, 421- nozzle, 5- lubricating mechanism, 51- piston plate, 52- positioning assembly, 521- vertical rod, 522- cross plate, 523- guide groove, 53- driving assembly, 531- transmission column, 532- second driven helical gear disc, 533- second driving helical gear disc, 534- guide column, 6- oil guide hole, 7- recovery mechanism, 71- sealing plate, 72- adjusting assembly, 721- guide rod, 722- end block, 723- extrusion spring, 724- push rod, 8- limiting rod, 9- U-shaped frame, 10- fixed cylinder. DETAILED DESCRIPTION

[0021] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0022] The specific implementation of the present application is described in detail below in combination with specific embodiments.

[0023] As Figure 1 , Figure 2 , Figure 3As shown, it is a structural diagram of an electric power assisted steering transmission device provided by an embodiment of the application, including mounting plate 1 and control shaft 3, the surface of the mounting plate 1 is rotatably installed with steering column 2, the bottom end of the steering column 2 extends to below the mounting plate 1 and is fixedly installed with fixed frame 22, the fixed frame 22 is rotatably installed with wheel 23, the control shaft 3 is arranged above the mounting plate 1 and is connected with vehicle control components, the top end of the steering column 2 is fixedly installed with first driven helical gear 21, the bottom end of the control shaft 3 is fixedly installed with first driving helical gear 31, the first driving helical gear 31 is meshingly connected with the first driven helical gear 21, the surface of the mounting plate 1 is fixedly installed with fixed cylinder 10, the fixed cylinder 10 is sleeved outside the steering column 2 and the control shaft 3, the inner bottom of the fixed cylinder 10 is fixedly installed with oil storage tank 4, the top surface of the oil storage tank 4 is arranged as an open structure, the side wall of the fixed cylinder 10 is fixedly installed with oil injection pipe 41 which is in communication with the oil storage tank 4, the side wall of the fixed cylinder 10 is fixedly installed with spray pipe 42, the bottom end of the spray pipe 42 is in communication with the oil storage tank 4, the top end of the spray pipe 42 is provided with nozzle 421 and extends to outside the first driving helical gear 31, the oil storage tank 4 is provided with lubricating mechanism 5, the lubricating mechanism 5 includes piston plate 51, positioning assembly 52 and driving assembly 53, the piston plate 51 is slidably installed in the oil storage tank 4 along the vertical direction, the positioning assembly 52 is located in the oil storage tank 4 and is connected with the piston plate 51, the driving assembly 53 is located in the oil storage tank 4 and is connected with the positioning assembly 52, the driving assembly 53 is used to control the piston plate 51 to reciprocate along the vertical direction, the surface of the piston plate 51 is provided with oil guide hole 6, the surface of the piston plate 51 is provided with recovery mechanism 7, the recovery mechanism 7 includes sealing plate 71 and adjusting assembly 72, the adjusting assembly 72 is located at the bottom wall of the piston plate 51 and is connected with the sealing plate 71, the adjusting assembly 72 is used to adjust the relative position of the sealing plate 71 and the oil guide hole 6.

[0024] In use, the oil tank 4 is injected with an appropriate amount of lubricating oil through the oil injection pipe 41, and the piston plate 51 seals the upper part of the oil tank 4 at this time. When steering is needed, the driver controls the vehicle control part to drive the control shaft 3 to rotate around its own axis, and the control shaft 3 drives the first driving bevel gear plate 31 to rotate synchronously, and the first driving bevel gear plate 31 drives the first driven bevel gear plate 21 to rotate synchronously, so that the steering column 2 can rotate around its own axis, and the fixed frame 22 and the wheel 23 can rotate synchronously, thereby realizing the steering function. At the same time of steering, the driving assembly 53 and the positioning assembly 52 cooperate to drive the piston plate 51 to reciprocate in the vertical direction in the oil tank 4, and the piston plate 51 exerts a pushing force on the lubricating oil in the oil tank 4 when moving downward, and the lubricating oil flows into the spray pipe 42 and is sprayed through the nozzle 421 to the meshing position of the first driving bevel gear plate 31 and the first driven bevel gear plate 21, so that the meshing position of the first driving bevel gear plate 31 and the first driven bevel gear plate 21 can be efficiently lubricated. When the piston plate 51 moves downward, the adjusting assembly 72 controls the sealing plate 71 to be attached to the bottom wall of the piston plate 51, and at this time the oil guide hole 6 is in a sealed state. When the piston plate 51 moves upward to the highest position in the oil tank 4, the adjusting assembly 72 controls the sealing plate 71 to move away from the piston plate 51, and at this time the oil guide hole 6 is in a through state, and the sprayed lubricating oil falls on the surface of the piston plate 51, and the excess lubricating oil can flow back to the lower part of the piston plate 51 through the oil guide hole 6, thereby facilitating the reuse of the lubricating oil.

[0025] As shown in Figure 2 , Figure 4 , Figure 5 , as a preferred embodiment of the present application, the positioning assembly 52 comprises a vertical rod 521 fixedly installed on the surface of the piston plate 51, and a horizontal plate 522 is fixedly installed at the top end of the vertical rod 521, and a guide groove 523 is formed in the surface of the horizontal plate 522.

[0026] When steering, the driving assembly 53 controls the horizontal plate 522 to reciprocate in the vertical direction, and the horizontal plate 522 drives the vertical rod 521 to reciprocate synchronously, and the vertical rod 521 drives the piston plate 51 to reciprocate synchronously in the vertical direction.

[0027] As shown in Figure 2 , Figure 4 , Figure 5 , as a preferred embodiment of the present application, the driving assembly 53 comprises a transmission column 531 rotatably installed on the inner side wall of the oil tank 4, a second driven bevel gear plate 532 is fixedly installed at one end of the transmission column 531 towards the horizontal plate 522, a guide column 534 is arranged at a position deviating from the center of the surface of the second driven bevel gear plate 532, the guide column 534 is inserted into the guide groove 523, a second driving bevel gear plate 533 is fixedly installed on the surface of the steering column 2, and the second driving bevel gear plate 533 is connected in meshing with the second driven bevel gear plate 532.

[0028] When turning, the steering column 2 rotates around its own axis, and the steering column 2 drives the second active helical gear 533 to rotate synchronously. The second active helical gear 533 meshes with the second driven helical gear 532, which can drive the transmission column 531 to rotate around its own axis. When the second driven helical gear 532 rotates, it drives the guide column 534 to rotate synchronously. When the guide column 534 rotates in the guide groove 523, it drives the horizontal plate 522 to move back and forth in the vertical direction.

[0029] like Figure 2 , Figure 5 , Figure 6 , Figure 7 As shown, in a preferred embodiment of the present invention, the adjusting assembly 72 includes multiple sets of guide rods 721 fixedly installed on the bottom wall of the piston plate 51 and located outside the oil guide hole 6. The sealing plate 71 is slidably installed on the surface of the multiple sets of guide rods 721. An end block 722 is fixedly installed at the bottom end of the guide rod 721. A compression spring 723 is fixedly installed on the surface of the end block 722. The telescopic end of the compression spring 723 surrounds the outside of the guide rod 721 and is connected to the sealing plate 71. A push rod 724 is fixedly installed on the inner side wall of the oil reservoir 4. The push rod 724 has an L-shaped structure.

[0030] Multiple sets of guide rods 721 position the sealing plate 71. The sealing plate 71 and the oil guide hole 6 are distributed opposite each other. Initially, the compression spring 723 applies a pushing force to the sealing plate 71, and the sealing plate 71 is in contact with the bottom wall of the piston plate 51. At this time, the oil guide hole 6 is in a closed state. When the piston plate 51 moves upward to the highest position, the push rod 724 passes through the oil guide hole 6 and applies a downward pushing force to the sealing plate 71. At this time, the sealing plate 71 moves away from the piston plate 51, and the oil guide hole 6 is in a through state.

[0031] like Figure 5 , Figure 6 As shown, in a preferred embodiment of the present invention, multiple sets of limiting rods 8 are fixedly installed on the inner side wall of the oil tank 4, and the limiting rods 8 are slidably connected to the piston plate 51 in the vertical direction.

[0032] like Figure 4 , Figure 5 As shown, in a preferred embodiment of the present invention, a U-shaped frame 9 is fixedly installed on the inner side wall of the oil storage tank 4, and the U-shaped frame 9 is rotatably connected to the transmission column 531.

[0033] The working principle of the present application is that: in use, the appropriate amount of lubricating oil is injected into the inner cavity of the oil storage tank 4 through the oil injection pipe 41, at this time the piston plate 51 seals the upper part of the oil storage tank 4, when steering is needed, the driver controls the vehicle control part to drive the control shaft 3 to rotate around its own axis, the control shaft 3 drives the first driving helical gear plate 31 to rotate synchronously, the first driving helical gear plate 31 meshes with the first driven helical gear plate 21 to drive the steering column 2 to rotate around its own axis, the steering column 2 drives the fixed frame 22 and the wheel 23 to rotate synchronously, thereby realizing the steering function. At the same time of steering, the steering column 2 rotates around its own axis, the steering column 2 drives the second driving helical gear plate 533 to rotate synchronously, the second driving helical gear plate 533 meshes with the second driven helical gear plate 532 to drive the transmission column 531 to rotate around its own axis, the second driven helical gear plate 532 drives the guide column 534 to rotate synchronously when rotating, the guide column 534 drives the horizontal plate 522 to move reciprocatingly along the vertical direction when rotating in the guide groove 523. The horizontal plate 522 drives the vertical rod 521 to move reciprocatingly synchronously, the vertical rod 521 drives the piston plate 51 to move reciprocatingly along the vertical direction synchronously.

[0034] When the piston plate 51 moves downward, it exerts a pushing force on the lubricating oil in the inner cavity of the oil storage tank 4, the lubricating oil flows into the spray pipe 42 and is sprayed through the nozzle 421 to the meshing position of the first driving helical gear plate 31 and the first driven helical gear plate 21, the lubricating oil can efficiently lubricate the meshing position of the first driving helical gear plate 31 and the first driven helical gear plate 21. When the piston plate 51 moves downward, the sealing plate 71 is attached to the bottom wall of the piston plate 51, at this time the oil guide hole 6 is in a sealed state. When the piston plate 51 moves upward in the inner cavity of the oil storage tank 4 to the highest position, at this time the push rod 724 exerts a downward pushing force on the sealing plate 71 through the oil guide hole 6, at this time the sealing plate 71 moves away from the piston plate 51, at this time the oil guide hole 6 is in a through state. After the sprayed lubricating oil falls on the surface of the piston plate 51, the excess lubricating oil can flow back to the lower part of the piston plate 51 through the oil guide hole 6, thereby facilitating the reuse of the lubricating oil.

[0035] The preferred embodiments of the present application have been described in detail above, but the present application is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the present application.

Claims

1. An electric power assisted steering transmission device, comprising a mounting plate and a control shaft, the mounting plate is surface-mounted with a steering column, the bottom end of the steering column extends below the mounting plate and is fixedly mounted with a fixed frame, the fixed frame is rotatably mounted with a wheel, the control shaft is arranged above the mounting plate and is connected with a vehicle control component, the top end of the steering column is fixedly mounted with a first driven helical gear disc, the bottom end of the control shaft is fixedly mounted with a first driving helical gear disc, the first driving helical gear disc is meshingly connected with the first driven helical gear disc, the mounting plate is surface-fixedly mounted with a fixed cylinder, the fixed cylinder is sleeved outside the steering column and the control shaft, characterized in that, The bottom of the fixed cylinder is fixedly provided with an oil storage tank, the top surface of the oil storage tank is provided with an opening structure, the side wall of the fixed cylinder is fixedly provided with an oil injection pipe communicated with the oil storage tank, the side wall of the fixed cylinder is fixedly provided with a spray pipe, the bottom end of the spray pipe is communicated with the oil storage tank, and the top end of the spray pipe is provided with a nozzle and extends to the outside of the first driving helical gear plate. The oil storage tank is provided with a lubricating mechanism, the lubricating mechanism comprises a piston plate, a positioning assembly and a driving assembly, the piston plate is slidably arranged in the oil storage tank in the vertical direction; The positioning assembly is located in the oil storage tank and connected with the piston plate, and the driving assembly is located in the oil storage tank and connected with the positioning assembly, and the driving assembly is used to control the reciprocating movement of the piston plate in the vertical direction. The surface of the piston plate is provided with a guide hole, and the surface of the piston plate is provided with a recovery mechanism comprising a sealing plate and an adjusting assembly. The adjusting assembly is located on the bottom wall of the piston plate and connected with the sealing plate, and the adjusting assembly is used to adjust the relative position of the sealing plate and the guide hole.

2. An electric power assisted steering transmission according to claim 1, characterised in that, The positioning assembly comprises a vertical rod fixedly arranged on the surface of the piston plate, and the top end of the vertical rod is fixedly provided with a horizontal plate.

3. An electric power assisted steering transmission according to claim 2, wherein the first and second pulleys are arranged to rotate in opposite directions. The driving assembly comprises a transmission column rotatably arranged on the inner side wall of the oil storage tank, one end of the transmission column towards the horizontal plate is fixedly provided with a second driven helical gear plate, the second driven helical gear plate is provided with a guide column deviated from the center of the surface, the guide column is inserted into the guide groove, and the surface of the transmission column is fixedly provided with a second driving helical gear plate, and the second driving helical gear plate is meshed and connected with the second driven helical gear plate.

4. An electric power assisted steering transmission according to claim 1, wherein the electric motor is arranged to drive the pinion gear via a belt drive. The adjusting assembly comprises a plurality of guide rods fixedly arranged on the bottom wall of the piston plate and located outside the guide hole, the sealing plate is slidably arranged on the surface of the plurality of guide rods, the bottom end of the guide rod is fixedly provided with an end block, the surface of the end block is fixedly provided with an extrusion spring, the extension end of the extrusion spring is wrapped outside the guide rod and connected with the sealing plate, the inner side wall of the oil storage tank is fixedly provided with a push rod, and the push rod is of L-shaped structure.

5. An electric power assisted steering transmission according to claim 1, wherein the electric motor is mounted on the housing. The inner side wall of the oil storage tank is fixedly provided with a plurality of limiting rods, and the limiting rods are slidably connected with the piston plate in the vertical direction.

6. An electric power assisted steering transmission according to claim 3 wherein the first and second pulleys are arranged to rotate in opposite directions. The inner side wall of the oil storage tank is fixedly provided with a U-shaped frame, and the U-shaped frame is rotatably connected with the transmission column.

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