Double-wheel electric differential steering wheel with hydraulic jacking function

Abstract

The double-wheel electric differential steering wheel with the hydraulic jacking function is characterized in that the double-wheel electric differential steering wheel comprises a plunger type hydraulic jacking mechanism and two driving units, and the driving units are arranged on the two sides of the plunger type hydraulic jacking mechanism respectively; the driving unit is composed of a reduction gearbox and wheels, the reduction gearbox comprises a box body and a box cover, the box body and the box cover are connected through bolts, a speed reducer is installed on one side of the box body, and a walking motor is installed at the input end of the speed reducer; and the wheels are installed on the other side of the box body through hubs, the two box covers are connected with a connecting plate through screws, the two ends of the connecting plate are fixedly connected and hinged to fixing bases correspondingly, and two hinge shafts are symmetrically welded to the plunger type hydraulic jacking mechanism. The invention relates to the technical field of steering wheels, in particular to a double-wheel electric differential steering wheel with a hydraulic jacking function. The technical problem to be solved by the invention is to provide the double-wheel electric differential steering wheel with the hydraulic jacking function, so that material transfer is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of steering wheels, in particular to a double-wheel electric differential steering wheel with hydraulic jacking. Background Art

[0002] The dual-wheel electric differential steering wheel with hydraulic jacking is the core component of electric industrial vehicles. It integrates key components such as hydraulic jacking mechanism, travel motor, reduction gearbox, wheels, slewing bearing, etc., which determines the power and operating performance of the whole vehicle. Currently, heavy-duty steering wheels are widely used in logistics and industrial industries. When in use, they not only require high load and small turning space, but also the materials being transported will be lifted from low places to high places, or the items from high places will be moved to low places.

[0003] The existing steering wheels on the market do not have a lifting function. Due to height restrictions, the steering wheels can only move materials at the same height; they cannot move high-altitude logistics to a low place, or lift low-altitude logistics to a high place. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a double-wheel electric differential steering wheel with hydraulic jacking to facilitate material transportation.

[0005] The present invention adopts the following technical solutions to achieve the invention objectives:

[0006] A two-wheel electric differential steering wheel with hydraulic jacking, characterized in that it comprises: a plunger-type hydraulic jacking mechanism and two drive units, wherein the drive units are respectively arranged on both sides of the plunger-type hydraulic jacking mechanism; the drive unit is composed of a reduction box and wheels, the reduction box comprises a box body and a box cover, the box body and the box cover are connected by bolts, a two-stage reduction gear set is installed in the box body, a reducer is installed on one side of the box body, and a travel motor is installed at the input end of the reducer; the wheel is installed on the other side of the box body through a wheel hub, and the output end of the reducer is connected to the input end of the two-stage reduction gear set , the output end of the two-stage reduction gear set is connected to the wheel hub; the two drive units are connected together through an articulated fixing seat and a connecting plate; the two box covers are connected to the connecting plate by screws, and the two ends of the connecting plate are respectively fixedly connected to the articulated fixing seat, and two articulated shafts are symmetrically welded on the plunger-type hydraulic jacking mechanism, and the articulated fixing seat is attached to the articulated shaft through a lubricating sleeve; the box cover is installed on the articulated fixing seat, and the two drive units now constitute the driving part, and this connection method forms a swing bridge structure, and the driving part and the plunger-type hydraulic jacking mechanism are combined together through the swing bridge structure. When the travel motor rotates, the two-stage reduction gear set is driven to rotate through the reducer, and the rotation of the gear drives the output shaft installed on the two-stage reduction gear set with a spline rotation to rotate, so that the wheel rotates and drives the steering wheel assembly to move. A mounting seat is installed on the plunger of the plunger-type hydraulic jacking mechanism, and the mounting seat is fixed on the vehicle body. The plunger in the plunger-type hydraulic jacking mechanism is lifted by the pressure of the hydraulic oil, thereby lifting the vehicle body installed on the mounting seat; when descending, the plunger-type hydraulic jacking mechanism is no longer pressurized, and the plunger in the plunger-type hydraulic jacking mechanism is pressed back to the starting position by the weight of the vehicle body.

[0007] As a further limitation of the technical solution, the bearing on the cylinder of the plunger-type hydraulic jacking mechanism is connected to the slewing gear, an encoder seat is installed on the cylinder of the plunger-type hydraulic jacking mechanism, an encoder is installed on the encoder seat, a slewing pinion is installed on the encoder, the slewing pinion meshes with the slewing gear, one end of a fixed chain is fixedly connected to the slewing gear, and the other end of the fixed chain is fixedly connected to the mounting seat. The slewing gear is fixed by the fixed chain connection, and the fixed chain is foldable, and when the plunger-type hydraulic jacking mechanism is working, it can be raised and lowered along with the mounting seat. The mounting base is mounted on the vehicle body and remains stationary, and the plunger of the plunger-type hydraulic jacking mechanism remains stationary; when the steering wheel is turned, the cylinder of the plunger-type hydraulic jacking mechanism rotates, thereby realizing the steering function; when rotating, the speed difference and forward and reverse rotation of the travel motors in the two drive units are accurately controlled through the controller, so as to achieve the steering angle required by the steering wheel; thereby realizing the rotation of the steering wheel; through the rotating pinion installed on the encoder, when the steering wheel assembly rotates, the rotating pinion installed on the encoder meshes and rotates around the rotating gear, so as to detect the steering position.

[0008] As a further limitation of the technical solution, a connection bracket is installed on one side of the connection plate, a limit switch mounting seat is installed on the connection bracket, two limit switches are installed on the limit switch mounting seat, and a driver bracket is installed on one side of the connection plate, and a travel motor driver is installed on the driver bracket. The steering limit of the steering wheel is realized by adopting the limit switch.

[0009] As a further limitation of the technical solution, a limit block is installed on the rotary gear, and the limit block is used in conjunction with the limit switch to limit a certain angle through PLC control.

[0010] As a further limitation of the technical solution, the pull-wire switch is connected to the upper side of the fixed chain through the pull-wire switch fixing plate screw, and the bottom of the measuring line of the pull-wire switch is fixed to the lower side of the fixed chain. When the plunger-type hydraulic jacking mechanism is jacked, the fixed chain is unfolded, and the pull-wire switch is stretched as the fixed chain is unfolded. When it is jacked to a certain height, the pull-wire switch generates an electrical signal, and the height can be controlled by PLC.

[0011] As a further limitation of the technical solution, it also includes a drag chain protection component, which is installed on the connecting bracket and located above the limit switch. All the extended cables are wrapped with the drag chain to protect the cables from collision and friction with other places, so that the cables can ensure the safest bending angle.

[0012] Compared with the prior art, the advantages and positive effects of the present invention are:

[0013] 1. This steering wheel is a dual-wheel electric differential steering wheel with hydraulic jacking. The steering wheel has a hydraulic jacking mechanism. It is a dual-wheel electric differential structure. Each wheel is equipped with a separate reduction box to enable each wheel to have independent driving capabilities. This steering wheel uses dual servo travel motors without steering motors. When the motors are turned, the program algorithm accurately controls the transmission of the travel motors to achieve differential steering. This design not only meets the requirements of existing steering wheels in the market, such as low installation height, high load, small rotation space, etc., but also has a jacking function. The hydraulic jacking function allows the steering wheel to adjust the working height to meet different operating requirements. It can also be used as a hydraulic suspension system to stabilize the vehicle body. This design is more in line with the development needs of industries such as logistics and industry.

[0014] 2. The present invention can not only realize the advantages of electric differential steering wheels, such as low installation height, small turning radius, high steering accuracy, strong power, etc., but also has a hydraulic jacking function, so that it can be used as a power actuator for the lifting of the entire drive system, and cooperate with the position detection component to realize the active and fixed-point lifting function of the entire drive. For materials with height differences, the transfer of materials can be achieved through a hydraulic jacking mechanism, and there is no need to replace the operating vehicle or transfer materials through lifting and hoisting equipment; greatly increasing work efficiency. The plunger-type hydraulic jacking mechanism can be used as a hydraulic suspension. When encountering uneven terrain, the height of the vehicle body can be adjusted through the hydraulic jacking mechanism, so that the industrial vehicle installed on the steering wheel always remains at the same level, so that the steering wheel's requirements for ground flatness are further reduced.

[0015] 3. The present invention adopts a plunger-type hydraulic jacking mechanism with an extra-large cylinder diameter, which can withstand a certain degree of radial force; it has a stronger load-bearing capacity and greater stability.

[0016] 4. Chain transmission is commonly used in the market, while the present invention adopts gear transmission, which has low noise, long service life, maintenance-free, stable and reliable performance.

[0017] 5. The present invention adopts a swing bridge structure connection method, which allows the two driving parts of the steering wheel assembly to swing at a certain angle, so that the steering wheel itself has a certain ability to maintain its own stability.

[0018] 6. The present invention adopts a differential structure, and when the steering wheel turns in situ, it has rolling friction with the ground instead of static friction, which causes little damage to the ground and the wheel, and greatly improves the service life of the wheel.

[0019] 7. The present invention has a high degree of integration. In addition to satisfying the basic walking and steering functions, the steering wheel assembly itself is also equipped with electrical limiters, encoders, etc. for position feedback, and is controlled by a controller to realize the automatic control function of industrial vehicle steering. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the local three-dimensional structure of the present invention.

[0022] Figure 3 It is a side view of the present invention.

[0023] In the figure: 101, plunger type hydraulic jacking mechanism, 102, drag chain protection assembly, 103, driving part, 201, wheel, 202, box body, 203, box cover, 204, travel motor, 205, reducer, 206, hinged fixed seat, 207, connecting plate, 208, hinged shaft, 209, wheel hub, 301, mounting seat, 401, rotary gear, 402, encoder seat, 403, encoder, 404, rotary pinion, 405, fixed chain, 406, connecting bracket, 407, limit switch mounting seat, 408, limit switch, 409, driver bracket, 410, travel motor driver, 501, limit block, 502, pull wire switch fixing plate, 503, pull wire switch. DETAILED DESCRIPTION

[0024] A specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation.

[0025] The present invention comprises: a plunger-type hydraulic lifting mechanism 101 and two driving units, wherein driving units are respectively arranged on both sides of the plunger-type hydraulic lifting mechanism 101; the driving unit is composed of a reduction box and a wheel 201, wherein the reduction box comprises a box body 202 and a box cover 203, wherein the box body 202 and the box cover 203 are connected by bolts, wherein a two-stage reduction gear set is installed in the box body 202, wherein a reduction machine 205 is installed on one side of the box body 202, and a travel motor 204 is installed at the input end of the reduction machine 205; wherein the wheel 201 is installed on the other side of the box body 202 through a wheel hub 209, wherein the output end of the reduction machine 205 is connected to the input end of the two-stage reduction gear set, and the two-stage reduction gear set The output end is connected to the wheel hub 209; the two drive units are connected together through the hinged fixed seat 206 and the connecting plate 207; the two box covers 203 are connected to the connecting plate 207 by screws, and the two ends of the connecting plate 207 are respectively fixedly connected to the hinged fixed seat 206. Two hinge shafts 208 are symmetrically welded on the plunger type hydraulic jacking mechanism 101, and the hinged fixed seat 206 is attached to the hinge shaft 208 through a lubricating sleeve; the box cover 203 is installed on the hinged fixed seat 206, and the two drive units constitute the drive part 103 at this time. This connection method forms a swing bridge structure, and the drive part and the plunger type hydraulic jacking mechanism 101 are combined together through the swing bridge structure. When the travel motor 204 rotates, the two-stage reduction gear set is driven to rotate through the reducer 205, and the gear rotation drives the output shaft installed on the two-stage reduction gear set with a spline rotation to rotate, so that the wheel 201 rotates and drives the steering wheel assembly to move. A mounting seat 301 is installed on the plunger of the plunger-type hydraulic jacking mechanism 101, and the mounting seat 301 is fixed on the vehicle body. The plunger in the plunger-type hydraulic jacking mechanism 101 is lifted by the pressure of the hydraulic oil, thereby lifting the vehicle body installed on the mounting seat 301; when descending, the plunger-type hydraulic jacking mechanism 101 is no longer pressurized, and the plunger in the plunger-type hydraulic jacking mechanism 101 is pressed back to the starting position by the weight of the vehicle body.

[0026] The bearing on the cylinder of the plunger-type hydraulic jacking mechanism 101 is connected to the rotating gear 401, an encoder seat 402 is installed on the cylinder of the plunger-type hydraulic jacking mechanism 101, an encoder 403 is installed on the encoder seat 402, a rotating pinion 404 is installed on the encoder 403, the rotating pinion 404 meshes with the rotating gear 401, one end of a fixed chain 405 is fixedly connected to the rotating gear 401, and the other end of the fixed chain 405 is fixedly connected to the mounting seat 301. The rotating gear 401 is fixed by the fixed chain 405, and the fixed chain 405 is foldable. When the plunger-type hydraulic jacking mechanism 101 is working, it can be raised and lowered along with the mounting seat 301. The mounting base 301 is mounted on the vehicle body and remains stationary, and the plunger of the plunger-type hydraulic jacking mechanism 101 remains stationary; when the steering wheel is turned, the cylinder of the plunger-type hydraulic jacking mechanism 101 rotates, thereby realizing the steering function; when rotating, the speed difference and forward and reverse rotation of the travel motor 204 in the two drive units are accurately controlled through the controller, so as to achieve the steering angle required by the steering wheel; thereby realizing the rotation of the steering wheel; through the rotating pinion 404 installed on the encoder 403, when the steering wheel assembly rotates, the rotating pinion 404 installed on the encoder 403 engages and rotates around the rotating gear 401, thereby detecting the steering position.

[0027] A connection bracket 406 is installed on the connection plate 207 on one side, a limit switch mounting seat 407 is installed on the connection bracket 406, two limit switches 408 are installed on the limit switch mounting seat 407, and a driver bracket 409 is installed on the connection plate 207 on one side, and a travel motor driver 410 is installed on the driver bracket 409. The limit switch 408 is used to realize the limit of steering of the steering wheel.

[0028] The limit block 501 is installed on the rotary gear 404, and the limit block 501 is used in conjunction with the limit switch 408. Through PLC control, it plays the role of limiting a certain angle.

[0029] The pull-wire switch 503 is screwed to the upper side of the fixed chain 405 through the pull-wire switch fixing plate 502, and the bottom of the measuring line of the pull-wire switch 503 is fixed to the lower side of the fixed chain 405. When the plunger-type hydraulic jacking mechanism 101 is jacked, the fixed chain 405 is unfolded, and the pull-wire switch 503 is stretched as the fixed chain 405 is unfolded. When it is jacked to a certain height, the pull-wire switch 503 generates an electrical signal, and the height can be controlled by PLC.

[0030] It also includes a drag chain protection component 102, which is installed on the connecting bracket 406 and is located above the limit switch 408. All the extended cables are wrapped with drag chains to protect the cables from collision and friction with other places, so that the cables can ensure the safest bending angle.

[0031] The above disclosure is only a specific embodiment of the present invention, but the present invention is not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A dual-wheel electric differential steering wheel with hydraulic jacking, characterized in that: include: A plunger-type hydraulic jacking mechanism (101) and two drive units, wherein the drive units are respectively arranged on both sides of the plunger-type hydraulic jacking mechanism (101); The driving unit is composed of a reduction box and a wheel (201), wherein the reduction box comprises a box body (202) and a box cover (203), wherein the box body (202) and the box cover (203) are connected by bolts, a reduction machine (205) is installed on one side of the box body (202), and a travel motor (204) is installed at an input end of the reduction machine (205); and the wheel (201) is installed on the other side of the box body (202) via a wheel hub (209); The two box covers (203) are connected to the connecting plate (207) by screws, and the two ends of the connecting plate (207) are respectively fixedly connected to the hinged fixing seat (206), and two hinged shafts (208) are symmetrically welded on the plunger type hydraulic jacking mechanism (101), and the hinged fixing seat (206) is mounted on the hinged shaft (208) through a lubricating sleeve; The driving unit constitutes a driving part (103) to form a swing bridge structure; A mounting seat (301) is mounted on the plunger of the plunger-type hydraulic jacking mechanism (101), and the mounting seat (301) is fixed on the vehicle body.

2. The dual-wheel electric differential steering wheel with hydraulic jacking according to claim 1, characterized in that: The bearing on the cylinder of the plunger-type hydraulic lifting mechanism (101) is connected to the rotating gear (401); an encoder seat (402) is installed on the cylinder of the plunger-type hydraulic lifting mechanism (101); an encoder (403) is installed on the encoder seat (402); a rotating pinion (404) is installed on the encoder (403); the rotating pinion (404) meshes with the rotating gear (401); one end of a fixed chain (405) is fixedly connected to the rotating gear (401); the other end of the fixed chain (405) is fixedly connected to the mounting seat (301).

3. The dual-wheel electric differential steering wheel with hydraulic jacking according to claim 2 is characterized in that: A connecting bracket (406) is installed on the connecting plate (207) on one side, a limit switch mounting seat (407) is installed on the connecting bracket (406), two limit switches (408) are installed on the limit switch mounting seat (407), and a driver bracket (409) is installed on the connecting plate (207) on one side, and a travel motor driver (410) is installed on the driver bracket (409).

4. The dual-wheel electric differential steering wheel with hydraulic jacking according to claim 3 is characterized in that: A limit block (501) is installed on the rotary gear (404), and the limit block (501) is used in conjunction with the limit switch (408).

5. The dual-wheel electric differential steering wheel with hydraulic jacking according to claim 4 is characterized in that: The pull-wire switch (503) is screwed to the upper side of the fixing chain (405) via a pull-wire switch fixing plate (502), and the bottom of the measuring line of the pull-wire switch (503) is fixed to the lower side of the fixing chain (405).

6. The dual-wheel electric differential steering wheel with hydraulic jacking according to claim 3, characterized in that: It also includes a drag chain protection component (102), which is installed on the connecting bracket (406) and is located above the limit switch (408).

Images