Pedal device, brake system, and work machine

Abstract

The utility model relates to the field of brake systems, and provides a pedal device, a brake system and an operating machine. The pushing piece is arranged at the end part of the piston rod; the linkage plate is arranged at the bottom of the pedal plate assembly; the rolling body is rotationally arranged on the linkage plate; the rolling body is in rolling contact with the pushing piece, and the rolling body and the pushing piece are used for converting rotary motion of the pedal assembly into linear motion of the piston rod of the brake valve; one end of the reset piece is connected with the main body bracket, and the other end is connected with one linkage plate. When the pedal assembly is treaded, the rotating shaft drives the linkage plate to move towards one side close to the pushing piece, so that the pushing piece pushes the piston rod to move; the rotary motion of the pedal assembly is converted into the linear motion of the piston rod of the brake valve; the rolling body is in rolling contact with the pushing piece, in the process that the linkage plate pushes the pushing piece, the problem of longitudinal force can be solved to a great extent, and the brake valve is prevented from being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of brake systems, in particular to a pedal device, a brake system and an operating machine. Background Art

[0002] With the development of diversified applications of operating machinery, the structure of operating machinery tends to be refined, humanized, and convenient for operation and maintenance. For example, the clutch pedal device in the operating machinery is usually required to ensure that the pedal stroke is positively correlated with the brake valve stroke, that is, the pedal stroke curve should not increase or decrease sharply, and the closer the performance curve is to a straight line, the better.

[0003] In the prior art, most pedal devices are foot pedals that are directly connected to the brake valve via a connecting rod. In the above structure, a longitudinal force perpendicular to the piston rod is usually applied to the end of the brake valve during the pedal device is stepped on. If the pedal device is used for a long time, the brake valve will be damaged due to the existence of the longitudinal force. Utility Model Content

[0004] The utility model provides a pedal device, a brake system and an operating machine, which are used to solve the defect that a large longitudinal force in the radial direction of a piston rod is usually applied to a brake valve during the pedaling process of the pedal device in the prior art, and the brake valve may be damaged after long-term use. The utility model can solve the problem of the longitudinal force to a great extent and avoid damage to the brake valve.

[0005] The utility model provides a pedal device, which is arranged on a main body bracket and is used to push a piston rod of a brake valve, comprising:

[0006] A foot pedal assembly is rotatably connected to the main support;

[0007] A pushing member, disposed at the end of the piston rod;

[0008] A linkage plate, arranged relatively at the bottom of the foot pedal assembly;

[0009] A rolling body is rotatably disposed on the linkage plate; and the rolling body is in rolling contact with the pushing member;

[0010] The rolling body and the pushing member are used to convert the rotational motion of the foot pedal assembly into the linear motion of the brake valve piston rod;

[0011] A reset member, one end of which is connected to the main frame, and the other end of which is connected to one of the linkage plates, is used to reset the foot pedal assembly.

[0012] A pedal device according to the utility model also includes:

[0013] A telescopic rod is arranged parallel to the reset member, one end of the telescopic rod is connected to one of the linkage plates, and the other end of the telescopic rod is connected to the main support.

[0014] According to a pedal device provided by the utility model, the rolling body includes one of a bearing, a roller, a ball, and a cam.

[0015] According to a pedal device provided by the utility model, the bottom end of the linkage plate on one side facing the pushing member is retracted in a direction away from the pushing member.

[0016] According to a pedal device provided by the utility model, the reset member includes a reset spring.

[0017] According to a pedal device provided by the utility model, the foot pedal assembly includes:

[0018] The pedal body is used to bear the pedal force;

[0019] A crank rod, one end of which is connected to the bottom of the pedal body;

[0020] A rotating shaft is connected to the other end of the curved rod, and the rotating shaft is rotatably connected to the main body bracket.

[0021] According to a pedal device provided by the utility model, the pedal body comprises:

[0022] a first inclined plate;

[0023] A flat plate connected to the bottom end of the first inclined plate, and the flat plate is connected to the curved rod;

[0024] The second inclined plate is connected to the bottom end of the flat plate; and the angles between the first inclined plate and the flat plate, and between the second inclined plate and the flat plate are both obtuse angles.

[0025] According to a pedal device provided by the utility model, the pushing member includes:

[0026] A circular plate, the axis of which coincides with the axial direction of the piston rod;

[0027] A pair of mounting plates are vertically arranged on the side of the circular plate facing the piston rod and located on two opposite sides of the piston rod; the mounting plates and the piston rod are detachably connected.

[0028] The utility model also provides a braking system, comprising:

[0029] Brake valve;

[0030] The pedal device as described above is used to push the brake valve.

[0031] The utility model also provides a working machine, comprising the pedal device as described above, or the brake system as described above.

[0032] The pedal device provided by the utility model is connected with the bottom end of the foot pedal assembly through a rotating shaft, and the rotating shaft is rotatably connected with the main body bracket, a pushing member is arranged at the end of the piston rod, a linkage plate is relatively arranged at the bottom of the rotating shaft, a rolling body is rotatably arranged on the linkage plate, and the rolling body is in rolling contact with the pushing member, and the rolling body and the pushing member are used to convert the rotational motion of the foot pedal assembly into the linear motion of the brake valve piston rod; one end of the reset member is connected with the main body bracket, and the other end is connected with one of the linkage plates for resetting the foot pedal assembly; when the foot pedal assembly is stepped on, the foot pedal assembly rotates relative to the main body bracket, thereby driving the linkage plate to move toward the side close to the pushing member, and then the pushing member pushes the piston rod to move; the rotational motion of the foot pedal assembly is converted into the linear motion of the brake valve piston rod; the rolling body is in rolling contact with the pushing member, and in the process of the linkage plate pushing the pushing member, the problem of longitudinal force can be solved to a large extent, thereby avoiding damage to the brake valve.

[0033] The brake system and the working machine provided by the utility model, because they include the pedal device as described above, have the various advantages as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 is a cross-sectional view of a pedal device according to an embodiment of the utility model;

[0036] Figure 2 This is a schematic diagram of the installation structure of a pedal device according to an embodiment of the present utility model;

[0037] Figure 3 It is a side view of the mounting structure of a pedal device according to an embodiment of the utility model;

[0038] Figure 4 It is a bottom view of the mounting structure of a pedal device according to an embodiment of the utility model;

[0039] Reference numerals:

[0040] 100, main frame; 200, brake valve;

[0041] 1. Foot pedal assembly; 2. Telescopic rod; 3. Linkage plate; 4. Pushing member; 5. Resetting member; 6. Rolling element;

[0042] 11. pedal body; 12. crank; 13. rotation axis; 111. first inclined plate; 112. flat plate; 113. second inclined plate;

[0043] 41. Circular plate; 42. Mounting plate. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0045] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are 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, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0046] Combine the following Figures 1 to 4 The pedal device of the utility model is described.

[0047] like Figure 1 and Figure 2 As shown, the first embodiment of the utility model provides a pedal device, which is arranged on a main frame 100 and is used to push the piston rod of the brake valve 200 to move, including a foot pedal assembly 1, a linkage plate 3, a pushing member 4, a rolling body 6 and a reset member 5.

[0048] Among them, the pedal assembly 1 is the input part of the entire pedal device, which is usually used to receive the pedaling action of a person. The bottom end of the pedal assembly 1 is rotatably connected to the main frame 100; it means that the pedal assembly 1 and the main frame 100 can rotate relative to each other, but will not separate. When the pedal assembly 1 is stepped on, the steering force can be transmitted. The linkage plate 3 is arranged at the bottom of the pedal assembly 1, and the linkage plate 3 is used to connect and transmit the action of the pedal assembly 1. The pusher 4 is arranged at the end of the piston rod, which is used to move synchronously with the piston rod. The rolling body 6 is rotatably arranged on the linkage plate 3, and the rolling body 6 is in rolling contact with the pusher 4. One end of the reset member 5 is connected to the main frame 100, and the other end is connected to one of the linkage plates 3. When the pedal is stepped on, the linkage plate 3 will drive the pusher 4 to move along the direction of the piston rod. This pusher 4 forms a line contact or a surface contact with the rolling body 6, which can largely solve the problem of the longitudinal force of the piston rod and prevent damage to the brake valve.

[0049] The pedal device provided by the utility model, when the foot pedal group is stepped on, the foot pedal assembly 1 rotates relative to the main frame 100, thereby driving the linkage plate 3 to move toward the side close to the pushing member 4, and the rolling body 6 is rotatably arranged on the linkage plate 3, and the rolling body 6 is in rolling contact with the pushing member 4 and forms a line contact or a surface contact; thereby, the pushing member 4 pushes the piston rod to move; the rotational motion of the foot pedal assembly 1 is converted into the linear motion of the brake valve piston rod; since the rolling body 6 is in rolling contact with the pushing member 4, in the process that the linkage plate 3 pushes the pushing member 4, the pushing force of the linkage plate 3 on the pushing member 4 can solve the problem of the longitudinal force to a large extent, thereby protecting the brake valve and preventing damage.

[0050] Specifically, the linkage plate 3 can be provided as a pair, and the pair of linkage plates 3 are relatively arranged at the bottom of the pedal assembly 1, providing a stable path or track for the rolling body 6, so that it can rotate between the linkage plates 3. The rolling body 6 is rotatably arranged between the pair of linkage plates 3; and the rolling body 6 and the pusher 4 are in rolling contact and form a contact surface. When the pedal assembly 1 is stepped on, the linkage plate 3 rotates with the rotating shaft 13, and transmits this action through the rolling body 6, thereby driving the piston rod to move, thereby realizing the conversion of the rotational motion of the pedal assembly 1 into the linear motion of the brake valve piston rod.

[0051] like Figure 3 As shown, assuming that the rotation axis of the rotating shaft 13 is the first axis, the rotation axis of the rolling body 6 is the second axis, the distance between the first axis and the second axis is L, the rotation angle of the pedal assembly 1 is α, and the moving distance of the pusher 4 is S, then S=L*sinα.

[0052] Among them, L is constant, and the sin function is approximately a direct proportional function within the definition domain (0-20°).

[0053] Therefore, through the arrangement of the above structure, the stroke of the brake valve piston rod is positively correlated with the rotation angle of the pedal assembly 1, and can be quantitatively calculated.

[0054] The foot pedal assembly 1 includes a rotating shaft 13 , which is rotatably connected to the main frame 100 , and the rotating shaft 13 is located at the bottom end of the foot pedal assembly 1 .

[0055] In addition, compared with the prior art, the connecting rod structure connected to the brake valve is configured as a linkage plate 3 and a rolling body 6, which not only reduces the overall size, but also, when the foot pedal assembly 1 is stepped on, the linkage plate 3 rotates with the rotating shaft 13, and the rolling body 6 rolls in contact with the pusher 4 to form a rolling line contact or surface contact, thereby minimizing the longitudinal force applied to the brake valve.

[0056] In a feasible embodiment of the present invention, the rolling body 6 includes one of a bearing, a roller, a ball, and a cam. The rolling body 6 only needs to be able to roll. The purpose of the setting is to reduce the friction force of the linkage plate 3 pushing the pushing member 4 to reduce friction and wear; moreover, the linkage plate 3 will move in an arc along the axis of the rotating shaft 13, and the motion conversion is realized through the rolling body 6.

[0057] In a feasible embodiment of the present invention, the bottom end of the linkage plate 3 on one side facing the pushing member 4 is retracted in a direction away from the pushing member 4, that is, the length of the bottom side of the linkage plate 3 is smaller than the top side, so as to avoid interference between the bottom side of the linkage plate 3 and the pushing member 4 when the foot pedal assembly 1 is stepped on.

[0058] In a feasible embodiment of the present invention, the reset member 5 can be a reset spring, one end of which is connected to the main support 100 and the other end is connected to the linkage plate 3. The main function of the reset member 5 is to provide a reset mechanism to ensure that the linkage plate 3 can return to its original position or neutral position after the action is completed. This reset mechanism is crucial to ensure the stability and continuous action of the device.

[0059] When an external force (such as the pedaling action) acts on the linkage plate 3, the linkage plate 3 will rotate and contact the pusher 4. When the external force disappears, the reset member 5 will help the linkage plate 3 return to its original position. This reset mechanism can ensure the stability and reliability of the device in continuous operation.

[0060] In a feasible embodiment of the present invention, the pedal assembly 1 includes a pedal body 11 and a crank 12. The pedal body 11 is used to bear the pedal force, and the pedal body 11 is designed to bear and transmit the pedal force; one end of the crank 12 is connected to the bottom of the pedal body 11, and the other end is connected to the rotating shaft 13. The setting of the crank 12 allows the pedal force to be transmitted to the rotating shaft 13 when receiving the pedal force, while reducing or eliminating unnecessary vibration or deviation.

[0061] In a feasible embodiment of the utility model, the pedal body 11 includes a first inclined plate 111, a flat plate 112 and a second inclined plate 113. The flat plate 112 is connected to the bottom end of the first inclined plate 111, and the flat plate 112 is connected to the bent rod 12, so as to transmit the pedaling force to the bent rod 12; the second inclined plate 113 is connected to the bottom end of the flat plate 112; and the angles between the first inclined plate 111 and the flat plate, and between the second inclined plate 113 and the flat plate 112 are both obtuse angles, so that the entire pedal body 11 is more stable in structure. The obtuse angle design can ensure that the pedal is more stable when subjected to the pedaling force, reducing lateral deviation or vibration; through the obtuse angle design, the pedaling force can be more evenly distributed on the entire pedal, ensuring that the force can be more effectively transmitted to the bent rod and the rotating shaft.

[0062] In a feasible embodiment of the present invention, the pusher 4 includes a circular plate 41 and a pair of mounting plates 42. The axis of the circular plate 41 coincides with the axial direction of the piston rod. The function of the circular plate 41 is to allow the linkage plate 3 to rotate so that the part closest to the circular plate 41 contacts the circular plate in real time, thereby realizing the transmission of motion and force. This means that when the circular plate 41 rolls, its rolling direction is consistent with the axial direction of the piston rod, which can ensure efficient transmission of the action. A pair of mounting plates 42 are vertically arranged on the side of the circular plate 41 facing the piston rod, and are located on opposite sides of the piston rod; the mounting plates 42 and the piston rod are detachably connected. When the pusher 4 needs to be replaced and repaired, these components can be easily disassembled and reinstalled without major adjustments to the entire device.

[0063] like Figure 3 and Figure 4 As shown, it also includes a telescopic rod 2, which is arranged parallel to the reset member 5, and one end of the telescopic rod 2 is connected to one of the linkage plates 3, and the other end is connected to the main support 100. The arrangement of the telescopic rod 2 makes the structure more stable.

[0064] A second aspect of the present invention provides a braking system, comprising a brake valve and the pedal device as described above, wherein the pedal device is used to push the brake valve.

[0065] A third aspect of the present invention provides a working machine, comprising the pedal device as described above, or the brake system as described above.

[0066] In the embodiments of the present invention, the type of the working machine is not limited, for example, the working machine may be an excavator, a crane, a loader, etc. In other words, as long as the working machine can use the pedal device or the brake system of the present invention.

[0067] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0068] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "mode", "specific mode", or "some modes" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or mode are included in at least one embodiment or mode of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or mode. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or modes in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or modes described in this specification and the features of the different embodiments or modes, without contradiction.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A pedal device, arranged on a main frame (100), used to push a piston rod of a brake valve (200) to move, characterized in that: include: A foot pedal assembly (1) rotatably connected to the main frame (100); A pushing member (4) is arranged at the end of the piston rod; A linkage plate (3) arranged relatively to the bottom of the foot pedal assembly (1); A rolling body (6) is rotatably disposed on the linkage plate (3); the rolling body (6) is in rolling contact with the pushing member (4); The rolling body (6) and the pushing member (4) are used to convert the rotational motion of the pedal assembly (1) into the linear motion of the piston rod of the brake valve (200); A reset member (5) has one end connected to the main frame (100) and the other end connected to one of the linkage plates (3), and is used to reset the foot pedal assembly (1).

2. The pedal device according to claim 1, characterized in that: Also includes: The telescopic rod (7) is arranged in parallel with the reset member (5), and one end of the telescopic rod (7) is connected to one of the linkage plates (3), and the other end is connected to the main body bracket (100).

3. The pedal device according to claim 2, characterized in that: The rolling body (6) comprises one of a bearing, a roller, a ball and a cam.

4. The pedal device according to claim 2, characterized in that: The bottom end of the linkage plate (3) on one side facing the pushing member (4) is retracted in a direction away from the pushing member (4).

5. The pedal device according to claim 1, characterized in that: The reset element (5) comprises a reset spring.

6. The pedal device according to claim 1, characterized in that: The foot pedal assembly (1) comprises: A pedal body (11) for bearing pedal force; A curved rod (12), one end of which is connected to the bottom of the pedal body (11); The rotating shaft (13) is connected to the other end of the curved rod (12), and the rotating shaft (13) is rotatably connected to the main body bracket (100).

7. The pedal device according to claim 6, characterized in that: The pedal body (11) comprises: A first inclined plate (111); A flat plate (112) connected to the bottom end of the first inclined plate (111), and the flat plate (112) is connected to the curved rod (12); The second inclined plate (113) is connected to the bottom end of the flat plate (112); and the angles between the first inclined plate (111) and the flat plate, and between the second inclined plate (113) and the flat plate (112) are both obtuse angles.

8. The pedal device according to claim 1, characterized in that: The pushing member (4) comprises: A circular plate (41), the axis of which coincides with the axial direction of the piston rod; A pair of mounting plates (42) are vertically arranged on one side of the circular plate (41) facing the piston rod and are located on two opposite sides of the piston rod; the mounting plates (42) and the piston rod are detachably connected.

9. A braking system, characterized in that: include: Brake valve; The pedal device according to any one of claims 1 to 8, wherein the pedal device is used to push the brake valve.

10. A working machine, characterized in that: It comprises a pedal device as claimed in any one of claims 1 to 8, or a brake system as claimed in claim 9.

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