Power steering device, travel system, and work machine

Abstract

The utility model relates to the technical field of mining operation machinery, in particular to a power-assisted steering device, a walking system and operation machinery. According to the power-assisted steering device, a plurality of mounting fulcrums are oppositely arranged on the outer side of a frame; one ends of the boosting cylinders are hinged to the mounting fulcrums in a one-to-one correspondence manner; the knuckle arms are connected to the other ends of the power-assisted cylinders in a one-to-one correspondence mode. According to the power-assisted steering device, the walking system and the operation machine, the installation supporting point is arranged on the outer side of the vehicle frame, so that the power-assisted cylinder is installed on the outer side of the vehicle frame through the installation supporting point, the mode that the power-assisted cylinder is assembled in a trapezoidal structure of a steering axle in the prior art is replaced, the installation position of the power-assisted cylinder can be improved, and the working efficiency is improved. Therefore, the booster cylinder is prevented from being collided and damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of mining operation machinery, in particular to a power steering device, a walking system and an operation machinery. Background Art

[0002] The steering system is a crucial part of the lower vehicle part in operation machinery. For mining dump trucks, a full hydraulic steering system is a commonly used steering type. For a single-axle steering system, there are principle types such as load-sensitive type and accumulator-filled closed-core type. The actual steering action is executed by a booster cylinder pushing the wheel hub to achieve the offset of the wheel angle, and the Ackermann corner relationship is restricted by the steering bridge trapezoid during the process. Therefore, the booster cylinder support seat fulcrum and the wheel hub force point determine the front axle booster layout form. There are the following centralized layout forms in the prior art:

[0003] 1. The layout form where the booster cylinder is horizontally installed inside the steering bridge trapezoid; its disadvantages are: the booster cylinder is inevitably located at a low position of the vehicle, which will significantly increase the risk of collision damage in harsh environments such as mining areas.

[0004] 2. The pull-rod type layout form matching a hydraulic power steering gear; its disadvantages are: the structure and cost of the steering gear limit the design upper limit, and it does not meet the booster requirements for steering axles above 30 tons.

[0005] 3. The double-link central turntable type steering bridge layout form; its disadvantages are: poor casting versatility, many rod systems are prone to damage, and it does not conform to the traditional Ackermann corner relationship. Summary of the Utility Model

[0006] The utility model provides a power steering device, a walking system and an operation machinery to solve the defect that the booster cylinder has a low position and is prone to collision in the layout form where the booster cylinder is horizontally installed inside the steering bridge trapezoid in the background art.

[0007] The utility model provides a power steering device, including:

[0008] A plurality of mounting fulcrums are oppositely arranged on the outer side of the vehicle frame;

[0009] A plurality of booster cylinders, one end of each booster cylinder is hinged to the corresponding mounting fulcrum;

[0010] A plurality of joint arms, the joint arms are correspondingly connected to the other end of the booster cylinders.

[0011] According to the power steering device provided by the utility model, it further includes: a plurality of pitman arms, the pitman arms are oppositely arranged on the outer mounting surfaces of the front suspension front supports on the vehicle frame, and the mounting fulcrums are arranged on the pitman arms.

[0012] According to the power steering device provided by the present utility model, it further includes: a first ball pin, the first ball pin is arranged on the installation fulcrum, and one end of the power cylinder is hinged to the installation fulcrum through the first ball pin.

[0013] According to the power steering device provided by the present utility model, it further includes:

[0014] Fasteners, both the vertical arm and the front suspension front support seat are provided with mounting holes, and the fasteners pass through the mounting holes to fix the vertical arm on the outer mounting surface of the front suspension front support seat;

[0015] A lock washer, the lock washer is arranged between the fastener and the vertical arm.

[0016] According to the power steering device provided by the present utility model, it further includes: a second ball pin, the second ball pin is arranged at the other end of the power cylinder, and the knuckle arm is hinged to the power cylinder through the second ball pin.

[0017] According to the power steering device provided by the present utility model, it further includes: a steering oil circuit, one end of the steering oil circuit is connected to a steering oil tank, and the other end of the steering oil circuit penetrates through the vehicle frame and is connected to the power cylinder on the opposite side.

[0018] According to the power steering device provided by the present utility model, the power cylinder has an oil port, the oil port is connected to the steering oil circuit, and the oil port is located on the side of the power cylinder away from the vehicle frame.

[0019] According to the power steering device provided by the present utility model, it further includes: a full hydraulic steering gear, the full hydraulic steering gear is connected to the steering oil circuit, and the full hydraulic steering gear is provided with a two-way oil replenishing valve and a two-way overload valve.

[0020] A traveling system provided by the present utility model includes: the power steering device of the present utility model.

[0021] An operating machine provided by the present utility model includes: the power steering device or the traveling system of the present utility model.

[0022] A power steering device provided by the present utility model includes: a plurality of power cylinders and a plurality of knuckle arms; a plurality of installation fulcrums are relatively arranged on the outer side of the vehicle frame, and the installation fulcrums are used for installing the power cylinders. One end of each power cylinder is correspondingly hinged to the installation fulcrum; the knuckle arms are correspondingly connected to the other end of the power cylinders. The power steering device provided by the present utility model arranges the installation fulcrums on the outer side of the vehicle frame, so that the power cylinders are installed on the outer side of the vehicle frame through the installation fulcrums, replacing the way that the power cylinders are assembled in the steering bridge trapezoidal structure in the prior art, which can improve the installation position of the power cylinders and thus avoid the power cylinders from being knocked and damaged.

[0023] Furthermore, a traveling system provided by the present utility model includes the power steering device in the above-mentioned embodiments of the present utility model. Therefore, it has the same advantages as above.

[0024] Even further, a working machine provided by the present utility model includes the power steering device or the traveling system in the above-mentioned embodiments of the present utility model. Therefore, it has the same advantages as above. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a schematic structural diagram of the power steering device provided in one of the embodiments of the present utility model.

[0027] Figure 2 It is a top view of the power steering device provided in one of the embodiments of the present utility model.

[0028] Figure 3 It is a schematic structural diagram of the pitman arm, fastener, and lock washer provided in one of the embodiments of the present utility model.

[0029] Reference Signs:

[0030] 1: Boost cylinder; 2: Section arm; 3: Pitman arm; 4: First ball pin; 5: Fastener; 6: Lock washer; 7: Second ball pin; 8: Steering oil circuit; 9: Full hydraulic steering gear; 10: Frame. Detailed Embodiments

[0031] In order to make the objectives, technical solutions, and advantages of the present utility model clearer, the following will clearly and completely describe the technical solutions in the present utility model in conjunction with the drawings in the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments in the present utility model fall within the scope of protection of the present utility model.

[0032] In the description of the embodiments of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present utility model 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. Therefore, it should not be construed as a limitation to the embodiments of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0033] In the description of the embodiments of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "connected" and "connected to" 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 directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0034] In the embodiments of the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0035] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example" or "some examples", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0036] The following is combined with Figures 1 to 3Describe an assist steering device of the present utility model. The assist steering device includes: a plurality of assist cylinders 1 and a plurality of joint arms 2.

[0037] Among them, a plurality of mounting fulcrums are oppositely arranged on the outer side of the vehicle frame 10, and the mounting fulcrums are used for mounting the assist cylinders 1. One end of each assist cylinder 1 is hinged to the mounting fulcrum correspondingly; the joint arms 2 are connected to the other end of the assist cylinders 1 correspondingly.

[0038] Specifically, the plurality of mounting fulcrums arranged on the outer side of the vehicle frame 10 are symmetrically arranged along the length direction of the vehicle frame 10. The number of the mounting fulcrums, the assist cylinders 1 and the joint arms 2 is equal, and the number is the same as the number of the steering wheels in the running system. Generally, taking the case where two mounting fulcrums, two assist cylinders 1 and two joint arms 2 are arranged as an example, the mounting fulcrums are symmetrically arranged on the left and right sides of the vehicle frame 10. The assist cylinder 1 is hinged to the corresponding mounting fulcrum on this side. The joint arm 2 is mounted on the movable end of the assist cylinder 1. By the hydraulic work of the assist cylinder 1 to push and pull the joint arm 2, the joint arm 2 rotates, and then drives the steering wheel to turn.

[0039] For the assist steering device provided by the present utility model, mounting fulcrums are arranged on the outer side of the vehicle frame 10, so that the assist cylinders 1 are mounted on the outer side of the vehicle frame 10 through the mounting fulcrums, to replace the way that the assist cylinders 1 are assembled in the steering bridge trapezoidal structure in the prior art, which can improve the mounting position of the assist cylinders 1, thereby avoiding the assist cylinders 1 from being knocked and damaged; and, by directly pushing the joint arm 2 to rotate by the assist cylinder 1, the position space is large, which can reduce the design length of the joint arm 2 and reduce the force arm.

[0040] The assist steering device provided by the present utility model includes: a plurality of assist cylinders 1 and a plurality of joint arms 2; a plurality of mounting fulcrums are oppositely arranged on the outer side of the vehicle frame 10, and the mounting fulcrums are used for mounting the assist cylinders 1. One end of each assist cylinder 1 is hinged to the mounting fulcrum correspondingly; the joint arms 2 are connected to the other end of the assist cylinders 1 correspondingly. For the assist steering device provided by the present utility model, mounting fulcrums are arranged on the outer side of the vehicle frame 10, so that the assist cylinders 1 are mounted on the outer side of the vehicle frame 10 through the mounting fulcrums, to replace the way that the assist cylinders 1 are assembled in the steering bridge trapezoidal structure in the prior art, which can improve the mounting position of the assist cylinders 1, thereby avoiding the assist cylinders 1 from being knocked and damaged.

[0041] In one embodiment of the present utility model, the power steering device further includes: a plurality of drop arms 3, which are oppositely arranged on the outer mounting surface of the front suspension front support on the frame 10, and the mounting fulcrum is arranged on the drop arm 3. Specifically, by arranging a plurality of drop arms 3 on the outer mounting surface of the front suspension front support on the frame 10, and the drop arms 3 are symmetrically arranged along the length direction of the frame 10, and the mounting fulcrum is arranged on the drop arm 3, and the power cylinder 1 is mounted through the mounting fulcrum. In this embodiment, by fixing the drop arm 3 on the outer mounting surface of the front suspension front support, a fulcrum is provided for the installation of the power cylinder 1, and the position of the fulcrum of the power cylinder 1 on the drop arm 3 can be adjusted by design to make the power cylinder 1 as parallel as possible to the thrust rod, so as to reduce the compensation amount.

[0042] In one embodiment of the present utility model, the drop arm 3 is an integral structure composed of a rectangular fixing structure and a triangular mounting structure. The rectangular fixing structure is located at the top of the triangular mounting structure, and the rectangular fixing structure can be fixed to the outside of the front suspension front support through the fastener 5, and the mounting node is arranged on the triangular mounting structure. Optionally, the rectangular fixing structure is a rectangular steel plate, and the triangular mounting structure is a triangular steel plate, and the two are welded into one body.

[0043] In one embodiment of the present utility model, the power steering device further includes: a first ball pin 4, which is arranged on the mounting fulcrum, and one end of the power cylinder 1 is hinged to the mounting fulcrum through the first ball pin 4. Specifically, a ball pin mounting sleeve is welded on the triangular mounting structure of the drop arm 3, and the first ball pin 4 is mounted in the ball pin mounting sleeve. In this embodiment, by arranging the first ball pin 4 on the drop arm 3, the angle adjustment of the power cylinder 1 is realized.

[0044] In one embodiment of the present utility model, the power steering device further includes: a fastener 5 and a lock washer 6. Among them, mounting holes are provided on both the drop arm 3 and the front suspension front support, and the fastener 5 passes through the mounting holes to fix the drop arm 3 on the outer mounting surface of the front suspension front support; the lock washer 6 is arranged between the fastener 5 and the drop arm 3. Specifically, the fastener 5 can include a pin shaft, a bolt and a nut, etc. Among them, the pin shaft positions the drop arm 3 and mounts it on the front suspension front support, and the bolt and the nut cooperate to fix the drop arm 3 on the front suspension front support. The installation of the drop arm 3 is realized through the cooperation of the pin shaft with the bolt and the nut, and the pin shaft is used as the main load-bearing component to reduce the requirement for bolt clamping; the lock washer 6 is arranged between the nut and the drop arm 3 to ensure the stability of the fixed installation of the drop arm 3.

[0045] In one embodiment of the present utility model, the power steering device further includes: a second ball pin 7, which is arranged at the other end of the power cylinder 1, and the knuckle arm 2 is hinged to the power cylinder 1 through the second ball pin 7. Specifically, the second ball pin 7 connects the knuckle arm 2 and the power cylinder 1 to realize the rotation of the knuckle arm 2. The knuckle arm 2 is assembled parallel to the front axle at the wheel side, and the force arm is substantially perpendicular to the power cylinder 1.

[0046] In one embodiment of the present utility model, the power steering device further includes: a steering oil circuit 8, one end of the steering oil circuit 8 is connected to a steering oil tank, and the other end of the steering oil circuit 8 penetrates through the vehicle frame 10 and is connected to the power cylinders 1 on the opposite side. In this embodiment, one end of the steering oil circuit 8 communicates with the oil tank, and the other end penetrates both sides of the vehicle frame 10. The steering oil circuit 8 can be connected to the oil tank and the power cylinders 1 on both sides through a tee, so as to ensure that the power cylinders 1 on both sides act simultaneously. Specifically, the steel pipe pipeline used for the steering oil circuit 8 is placed in front, and the design of penetrating through the vehicle frame 10 is adopted to reduce leakage points and facilitate maintenance; the hose pipeline used for the steering oil circuit 8 is placed in front and assembled near the outside of the vehicle frame 10 to avoid repeated large deformations of the hose caused by the suspension bouncing, thereby extending the service life. Moreover, the power steering device in this embodiment adopts an independent oil tank, and the system has good sealing performance to ensure cleanliness.

[0047] In one embodiment of the present utility model, the power cylinder 1 has an oil port, the oil port is connected to the steering oil circuit 8, and the oil port is located on the side of the power cylinder 1 away from the vehicle frame 10. In this embodiment, by the method of arranging the oil port on the side of the steering oil circuit 8 and arranging it nearby on the front side, the universality of the pipeline design is improved, which is convenient for pipeline layout and arrangement.

[0048] In one embodiment of the present utility model, the power steering device further includes: a full hydraulic steering gear 9, the full hydraulic steering gear 9 is connected to the steering oil circuit 8, and the full hydraulic steering gear 9 is provided with a two-way oil replenishing valve and a two-way overload valve. In this embodiment, a full hydraulic steering gear 9 with a two-way oil replenishing valve and a two-way overload valve is adopted. For the possible stroke jump of the power cylinder 1 caused by the suspension bouncing during driving, the stroke compensation can be carried out by the structure of the two-way overload valve and the two-way oil replenishing valve in the full hydraulic steering gear 9 to ensure the compensation of the flow rate change caused by the movement amount of the oil cylinder during the jump.

[0049] The present utility model also provides a traveling system, which can be a tire-type traveling system. The traveling system includes: the power steering device in the above-mentioned embodiment of the present utility model.

[0050] A traveling system provided by the present utility model includes the power steering device in the above-mentioned embodiment of the present utility model, and therefore, has the same advantages as above.

[0051] The present utility model also provides a working machine. The working machine includes: the power steering device or the traveling system in the above-mentioned embodiment of the present utility model.

[0052] A working machine provided by the present utility model includes the power steering device or the traveling system in the above-mentioned embodiment of the present utility model, and therefore, has the same advantages as above.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A power steering device, characterized in that: include: A plurality of mounting support points are relatively arranged on the outer side of the vehicle frame (10); A plurality of booster cylinders (1), one end of each of the booster cylinders (1) being hingedly connected to the mounting fulcrum in a one-to-one correspondence; A plurality of joint arms (2), wherein the joint arms (2) are connected to the other end of the booster cylinder (1) in a one-to-one correspondence.

2. The power steering device according to claim 1, characterized in that: Also includes: A plurality of hanging arms (3) are provided, wherein the hanging arms (3) are relatively arranged on the outer side mounting surface of the front suspension front support on the vehicle frame (10), and the mounting fulcrum is arranged on the hanging arms (3).

3. The power steering device according to claim 1 or 2, characterized in that: Also includes: A first ball pin (4), wherein the first ball pin (4) is arranged on the installation fulcrum, and one end of the booster cylinder (1) is hinged on the installation fulcrum through the first ball pin (4).

4. The power steering device according to claim 2, characterized in that: Also includes: A fastener (5) having mounting holes on both the vertical arm (3) and the front suspension front support, and the fastener (5) passes through the mounting holes to fix the vertical arm (3) on the outer mounting surface of the front suspension front support; An anti-loosening washer (6), wherein the anti-loosening washer (6) is arranged between the fastener (5) and the vertical arm (3).

5. The power steering device according to claim 1, characterized in that: Also includes: A second ball pin (7), wherein the second ball pin (7) is arranged at the other end of the booster cylinder (1), and the joint arm (2) is hinged to the booster cylinder (1) via the second ball pin (7).

6. The power steering device according to claim 1, 4 or 5, characterized in that: Also includes: A steering oil circuit (8), one end of which is connected to a steering oil tank, and the other end of which passes through the vehicle frame (10) and is connected to the booster cylinder (1) on the opposite side.

7. The power steering device according to claim 6, characterized in that: The booster cylinder (1) has an oil port, the oil port is connected to the steering oil circuit (8), and the oil port is located on a side of the booster cylinder (1) away from the vehicle frame (10).

8. The power steering device according to claim 6, characterized in that: Also includes: A full hydraulic steering gear (9), the full hydraulic steering gear (9) is connected to the steering oil circuit (8), and the full hydraulic steering gear (9) is provided with a two-way oil replenishment valve and a two-way overload valve.

9. A walking system, characterized in that: include: A power steering device as claimed in any one of claims 1 to 8.

10. A working machine, characterized in that: include: The power steering device according to any one of claims 1 to 8 or the travel system according to claim 9.

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