Engineering vehicle and electric steering axle

Abstract

The utility model discloses an engineering vehicle and an electric steering axle in the technical field of new energy automobiles, and aims to solve the problem that an existing electric steering axle in the prior art is difficult to serve as a system platform capable of performing accurate turning control. According to the engineering vehicle and the electric steering axle, compared with a traditional hydraulic power steering cylinder, a steering driving electric cylinder can accurately drive a steering knuckle to rotate according to a control signal, when the steering knuckle rotates, a sensor body cuts a magnetic induction line of a magnetic pole, and then the sensor body can send out a steering angle signal; and an accurate signal source is provided for closed-loop control. Therefore, the electric steering axle provided by the embodiment of the utility model provides a platform for accurate steering control, and can meet the execution of various accurate steering control methods.

Description

Technical Field

[0001] This utility model relates to an engineering vehicle and an electric steering axle, belonging to the field of new energy vehicle technology. Background Technology

[0002] Currently, electric drive axle technology has been widely promoted and applied, especially in the field of large vehicles such as buses and trucks. Due to its advantages such as high efficiency and environmental friendliness, it has gradually become the mainstream choice in the industry. However, it is worth noting that existing electric drive axle designs mainly focus on the overall vehicle drive function, concentrating on providing stable and powerful power output to meet the basic needs of these large vehicles in daily operation.

[0003] To adapt to construction operations in confined spaces, such as narrow streets and crowded construction sites, engineering vehicles such as cranes not only need to have strong lifting capacity, but also must be able to precisely control their turning radius to ensure flexible movement in narrow spaces, thereby improving work efficiency and maneuverability.

[0004] While current electric drive axle products on the market perform well in overall vehicle drive, they struggle to meet the high demands of engineering vehicles for precise cornering control. This is primarily because traditional electric drive axle designs do not adequately consider the handling requirements of engineering vehicles in specialized operating environments, lacking necessary steering precision and agility adjustment mechanisms. Consequently, existing electric drive axles are unsuitable as direct platforms for precise cornering control, limiting the performance and application scope of engineering vehicles in complex working environments.

[0005] Therefore, existing electric steering axles are difficult to use as a system platform for precise steering control. Utility Model Content

[0006] The purpose of this application is to overcome the shortcomings of the prior art and provide an engineering vehicle and an electric steering axle that provide an implementation platform for precise turning control.

[0007] To achieve the above objectives, this application employs the following technical solution:

[0008] In a first aspect, this application provides an electric steering axle, comprising:

[0009] The axle housing is rotatably connected to the steering knuckle via the steering kingpin;

[0010] A steering drive electric cylinder includes a telescopic shaft, which is connected to the steering knuckle via a first ball joint. The steering drive electric cylinder includes an input terminal for receiving control signals.

[0011] An angle sensor is located at the connection between the steering kingpin and the steering knuckle, and includes a sensor body and a magnetic pole. The sensor body includes an output terminal. When the magnetic pole rotates relative to the sensor body, the output terminal outputs a steering angle signal.

[0012] In some embodiments of the first aspect, the steering knuckle is fixedly connected to the trapezoidal arm, the sensor body is arranged on the trapezoidal arm, and the magnetic pole is arranged on the steering kingpin.

[0013] In some embodiments of the first aspect, the axle housing is provided with a steering cylinder support, and the steering drive electric cylinder is connected to the steering cylinder support via a second ball joint.

[0014] In some embodiments of the first aspect, a first input gear, a second shaft, and a third shaft are also included;

[0015] The first input gear is used to transmit torque to the motor output gear, and the first input gear is coaxially connected to the second shaft.

[0016] The second bushing is provided with a second output gear and a third output gear, and a sliding engagement sleeve coaxially connected to the second shaft is also provided between the second output gear and the third output gear; the sliding engagement sleeve is used to engage with the second output gear or the third output gear;

[0017] The third shaft coaxially connects the second input gear and the third input gear. The second input gear meshes with the second output gear, and the third input gear meshes with the third output gear. There is a set difference between the first transmission ratio between the second output gear and the second input gear and the second transmission ratio between the third output gear and the third input gear.

[0018] The axle housing is equipped with a double drive shaft for driving the wheels, and the third shaft is connected to the double drive shaft for transmission.

[0019] In some embodiments of the first aspect, the double drive shaft is coaxially connected to the differential, the differential includes a fourth input gear disposed on the outer wall, the third shaft is coaxially connected to a fourth output gear, and the fourth output gear meshes with the fourth input gear.

[0020] In some embodiments of the first aspect, the double drive shaft is connected to the sun gear, the sun gear meshes with planet gears on the planet carrier, the planet carrier is used to connect to the wheel, the planet gears on the planet carrier also mesh with a ring gear, and the ring gear is fixedly connected to the steering knuckle.

[0021] In some embodiments of the first aspect, the steering drive electric cylinder is a ball screw electric cylinder.

[0022] Secondly, this application also provides an engineering vehicle including the electric steering axle described in any embodiment of the first aspect.

[0023] Compared with the prior art, the beneficial effects achieved by this application are as follows:

[0024] The engineering vehicle and electric steering axle provided in this application, compared to traditional hydraulic power steering cylinders, feature an electric steering drive cylinder that can precisely drive the steering knuckle to rotate according to control signals. When the steering knuckle rotates, it may cause the sensor body to cut the magnetic field lines of the magnetic poles, thereby allowing the sensor body to emit a steering angle signal, providing an accurate signal source for closed-loop control. Therefore, the electric steering axle provided in this application provides a platform for precise steering control, capable of supporting the execution of various precise steering control methods. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the electric steering axle provided in this embodiment;

[0027] Figure 2 This is a schematic diagram of the transmission principle of the electric steering axle provided in this embodiment;

[0028] Figure 3 This is a schematic diagram of the angle sensor in the electric steering axle provided in this embodiment;

[0029] Figure 4 This is a structural schematic diagram of the engineering vehicle provided in this embodiment;

[0030] Figure 5 yes Figure 1 A schematic diagram of the electric steering axle during steering.

[0031] In the picture:

[0032] 11. Drive motor; 12. Motor controller;

[0033] 13. Multi-speed main reducer; 131. Motor output gear; 132. Second output gear; 133. Sliding engagement sleeve; 134. Third output gear; 135. First input gear; 136. Second input gear; 137. Third input gear; 138. Fourth output gear; 139. Fourth input gear; 140. Differential; 141. Double drive shaft;

[0034] 21. Steering tie rod; 22. Trapezoidal arm; 23. Steering knuckle assembly;

[0035] 24. Angle sensor; 241. Magnetic pole; 242. Sensor body;

[0036] 231. Steering kingpin; 232. Steering knuckle;

[0037] 31. Support seat; 32. Axle housing; 33. Steering cylinder support;

[0038] 41. Steering drive electric cylinder; 42. First ball joint; 43. Second ball joint; 44. Telescopic shaft;

[0039] 51. Wheel-side reducer; 511. Ring gear; 512. Planetary carrier; 513. Sun gear;

[0040] 611. Wheel;

[0041] 71. First axle; 72. Second axle; 73. Third axle. Detailed Implementation

[0042] The technical solutions of this application / the embodiments thereof will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application / the embodiments thereof, and not all embodiments thereof. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application / the application thereof or its application or use. Example 1

[0043] This embodiment provides an electric steering axle to solve the problem that electric drive axles are difficult to use as precise steering control platforms in the prior art.

[0044] refer to Figures 1 to 3 The electric steering axle provided in this embodiment includes,

[0045] The axle housing 32 is rotatably connected to the steering knuckle 232 via the steering kingpin 231;

[0046] The steering drive electric cylinder 41 includes a telescopic shaft 44, which is connected to the steering knuckle 232 via a first ball joint 42. The steering drive electric cylinder 41 includes an input terminal for receiving control signals.

[0047] Angle sensor 24 is located at the connection between steering kingpin 231 and steering knuckle 232. Angle sensor 24 includes sensor body 242 and magnetic pole 241. Sensor body 242 includes an output terminal. When magnetic pole 241 rotates relative to sensor body 242, the output terminal outputs a steering angle signal.

[0048] When in use, compared to traditional hydraulic power steering cylinders, refer to Figure 5 The electric steering cylinder 41 can precisely drive the steering knuckle 232 to rotate according to the control signal. When the steering knuckle 232 rotates, it may cause the sensor body 242 to cut the magnetic field lines of the magnetic pole 241, thereby allowing the sensor body 242 to emit a steering angle signal, providing an accurate signal source for closed-loop control. Therefore, the electric steering axle provided in this embodiment provides a platform for precise steering control and can meet the execution requirements of various precise steering control methods. Example 2

[0049] This embodiment provides an electric steering axle. This embodiment is an optimization based on Embodiment 1 to improve the technical effect and refine the technical solution. For details not described in this embodiment, please refer to Embodiment 1.

[0050] As one embodiment, it also includes a steering knuckle assembly 23, the steering knuckle 232 being fixedly connected to the trapezoidal arm 22, see reference. Figure 3 The sensor body 242 is arranged on the trapezoidal arm 22 to indirectly measure the angle between the steering knuckle 232 and the steering kingpin 231, and the magnetic pole 241 is arranged on the steering kingpin 231.

[0051] In this embodiment, considering the compact structure of the steering knuckle 232, the lack of suitable installation space for the steering knuckle 232, and the fact that the steering knuckle 232 and the trapezoidal arm 22 are fixedly connected while having a kinematic relationship, the sensor body 242 is arranged on the trapezoidal arm 22. This arrangement provides considerable information reliability. Furthermore, since the sensor body 242 is more difficult to install than the magnetic pole 241, the magnetic pole 241 is arranged on the steering kingpin 231.

[0052] As one embodiment, reference Figure 1 The axle housing 32 is equipped with a steering cylinder support 33, and the steering drive electric cylinder 41 is connected to the steering cylinder support 33 through a second ball joint 43. Arranging the steering drive electric cylinder 41 in the axle housing 32 reduces the transmission distance and saves chassis space.

[0053] As one embodiment, the electric steering axle can be installed on an electric vehicle, see reference. Figure 2 This embodiment also provides a multi-speed main reducer 13, and the electric steering axle also includes a first input gear 135, a second shaft II and a third shaft III; the first input gear 135 is coaxially connected to the first shaft I, and the first shaft I is the output shaft of the drive motor 11;

[0054] The first input gear 135 is used to transmit torque with the motor output gear 131. In this embodiment, the motor output gear 131 and the first input gear 135 are meshed together. The first input gear 135 is coaxially connected to the second shaft II and is the power input source of the second shaft II.

[0055] To improve compactness, a second output gear 132 and a third output gear 134 are fitted onto the second shaft II. Neither the second output gear 132 nor the third output gear 134 has a direct transmission relationship with the second shaft II. A sliding engagement sleeve 133, coaxially connected to the second shaft II, is provided between the second output gear 132 and the third output gear 134. The sliding engagement sleeve 133 engages with either the second output gear 132 or the third output gear 134, and the second shaft II transmits power to either the second output gear 132 or the third output gear 134 through the sliding engagement sleeve 133.

[0056] The third shaft III is coaxially connected to the second input gear 136 and the third input gear 137. The second input gear 136 meshes with the second output gear 132, and the third input gear 137 meshes with the third output gear 134. There is a set difference between the first transmission ratio between the second output gear 132 and the second input gear 136 and the second transmission ratio between the third output gear 134 and the third input gear 137.

[0057] The axle housing 32 includes a double drive shaft 141, which is used to drive the wheels 611. The third shaft III is connected to the double drive shaft 141 for transmission.

[0058] The sliding engagement sleeve 133 is connected to the second output gear 132 or the third output gear 134 respectively to realize the transmission of the double transmission shaft 141 for speed change.

[0059] In one embodiment, the double drive shaft 141 is coaxially connected to the differential 140. The differential 140 includes a fourth input gear 139 disposed on the outer wall, and a third shaft III is coaxially connected to a fourth output gear 138. The fourth output gear 138 meshes with the fourth input gear 139.

[0060] With the application of drive motor 11 and differential 140, the electric steering axle provided in this embodiment can meet more precise steering control.

[0061] In one embodiment, a wheel-side reducer 51 is also included. A double drive shaft 141 is connected to a sun gear 513, which meshes with planetary gears on a planet carrier 512. The planet carrier 512 is used to connect to the wheel 611, and the planetary gears on the planet carrier 512 also mesh with a ring gear 511, which is fixedly connected to a steering knuckle 232. This reduces the interference of the double drive shaft 141 on steering control.

[0062] As one embodiment, it also includes a motor controller 12 for precisely controlling the drive motor 11.

[0063] In one embodiment, the trapezoidal arms 22 on both sides of the electric steering axle are connected by steering tie rods 21.

[0064] In one embodiment, the axle housing 32 includes a support 31 on which the steering kingpin 231 is mounted.

[0065] In one embodiment, the steering drive electric cylinder 41 is a ball screw electric cylinder, which converts the rotational motion of the steering motor into the extension and retraction motion of the telescopic shaft 44 through the internal ball screw structure. Example 3

[0066] This embodiment provides an engineering vehicle, including the electric steering axle provided in Embodiment 1 or 2. Therefore, the engineering vehicle provided in this embodiment has the same technical effects as that in Embodiment 1 or 2, and will not be described again here.

[0067] refer to Figure 4 , Figure 4 The engineering vehicle shown includes a first axle 71, a second axle 72, and a third axle 73. The third axle 73 is a traditional steering load-bearing axle, while the first axle 71 and the second axle 72 are electric steering axles provided in Embodiment 1 or 2. Based on the electric steering axle provided in this embodiment as a control platform, multiple modes can be realized, such as front axle (third axle 73) steering mode, full axle steering mode, crab mode, and rear axle independent steering mode.

[0068] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0069] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "located in," "equipped with," "located in," "installed," "set," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through the specific circumstances. "Hinged connection" includes "rotational connection."

[0070] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An electric steering axle, characterized in that, include, The axle housing (32) is rotatably connected to the steering knuckle (232) via the steering kingpin (231); The steering drive electric cylinder (41) includes a telescopic shaft (44) which is connected to the steering knuckle (232) via a first ball joint (42). The steering drive electric cylinder (41) includes an input terminal for receiving control signals. An angle sensor (24) is located at the connection between the steering kingpin (231) and the steering knuckle (232), and includes a sensor body (242) and a magnetic pole (241). The sensor body (242) includes an output terminal. When the magnetic pole (241) rotates relative to the sensor body (242), the output terminal outputs a rotation angle signal.

2. The electric steering axle according to claim 1, characterized in that, The steering knuckle (232) is fixedly connected to the trapezoidal arm (22), the sensor body (242) is arranged on the trapezoidal arm (22), and the magnetic pole (241) is arranged on the steering kingpin (231).

3. The electric steering axle according to claim 1, characterized in that, The axle housing (32) is provided with a steering cylinder support (33), and the steering drive electric cylinder (41) is connected to the steering cylinder support (33) through a second ball joint (43).

4. The electric steering axle according to claim 1, characterized in that, It also includes a first input gear (135), a second shaft, and a third shaft; The first input gear (135) is used to transmit torque to the motor output gear (131), and the first input gear (135) is coaxially connected to the second shaft. The second bushing is provided with a second output gear (132) and a third output gear (134), and a sliding engagement sleeve (133) coaxially connected to the second shaft is also provided between the second output gear (132) and the third output gear (134); the sliding engagement sleeve (133) is used to engage with the second output gear (132) or the third output gear (134); The third shaft coaxially connects the second input gear (136) and the third input gear (137). The second input gear (136) meshes with the second output gear (132), and the third input gear (137) meshes with the third output gear (134). There is a set difference between the first transmission ratio between the second output gear (132) and the second input gear (136) and the second transmission ratio between the third output gear (134) and the third input gear (137). The axle housing (32) is provided with a double drive shaft (141) for driving the wheels (611), and the third shaft is connected to the double drive shaft (141) for transmission.

5. The electric steering axle according to claim 4, characterized in that, The double drive shaft (141) is coaxially connected to the differential (140). The differential (140) includes a fourth input gear (139) arranged on the outer wall. The third shaft is coaxially connected to the fourth output gear (138). The fourth output gear (138) meshes with the fourth input gear (139).

6. The electric steering axle according to claim 4, characterized in that, The double drive shaft (141) is connected to the sun gear (513), the sun gear (513) meshes with the planet gears on the planet carrier (512), the planet carrier (512) is used to connect with the wheel (611), the planet gears on the planet carrier (512) also mesh with the gear ring (511), and the gear ring (511) is fixedly connected to the steering knuckle (232).

7. The electric steering axle according to claim 1, characterized in that, The steering drive electric cylinder (41) is a ball screw electric cylinder.

8. An engineering vehicle, characterized in that, Includes the electric steering axle as described in any one of claims 1 to 7.

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