Limiting device and dumper

Abstract

The utility model discloses a limiting device and a dump truck, and relates to the technical field of mining dump trucks, and the limiting device comprises a base fixed on a frame of the dump truck; and the non-contact sensing assembly is fixed on the base, the sensing assembly is connected with a control circuit of the dumper, and when the sensing assembly detects that the box hopper reaches a specified position, a signal is transmitted to the control circuit to stop lifting. The non-contact sensing assembly is arranged to detect the position of the box hopper, interference of dust on the sensing assembly is avoided, on-off of a control circuit can be rapidly achieved, the response is rapid, sensitive and stable, the phenomena of dullness, clamping stagnation, interruption and the like are effectively avoided, and the device is more convenient to operate, more accurate in detection result, simple in structure, convenient to operate, economical and practical. The use and the popularization are convenient.

Description

Technical Field

[0001] The present application belongs to the technical field of mining dump trucks, and in particular relates to a limiting device and a dump truck. Background Art

[0002] The limit switch of the bucket of a mining dump truck is a control component for the maximum lifting angle of the bucket. It ensures that the bucket stops lifting before the lifting cylinder reaches the highest point of the stroke during lifting, and avoids leakage of the rubber ring on the upper cover of the lifting cylinder or damage to the upper cover. It is a protective switch for the lifting cylinder. At present, domestic mining dump trucks mostly use mechanical limit switches or directly install blocking rubber blocks to achieve bucket lifting stroke control. The limit switch of the bucket of a mining dump truck is a mechanical limit switch, which is composed of a contact travel switch, a pressure rod, and a base. The contact travel switch is connected to the power supply circuit of the bucket solenoid valve, and the start and stop of the lifting cylinder are achieved by controlling the switch of the bucket solenoid valve. Due to the high dust in the working environment, it is easy to cause a limit switch failure after entering the travel switch, resulting in the failure of the dump truck to lift the bucket, which restricts the production efficiency. Summary of the invention

[0003] The purpose of the present application is to provide a limit device and a dump truck, aiming to solve the technical problem that the existing limit switch is prone to failure during operation at least to a certain extent.

[0004] In order to solve the above technical problems, this application adopts the following technical solutions:

[0005] A first aspect of an embodiment of the present application provides a limiting device for limiting the position of a box bucket of a dump truck, the limiting device comprising: a base fixed to the frame of the dump truck; a non-contact sensing component fixed to the base, the sensing component being connected to a control circuit of the dump truck, and when the sensing component detects that the box bucket has reached a specified position, it transmits a signal to the control circuit to stop lifting.

[0006] In some embodiments, the sensing component includes: a sensing switch for sensing the position of the bin; a solid-state relay connected to the sensing switch, and the solid-state relay is used to control the connection or disconnection of the control circuit.

[0007] In some embodiments, the induction switch is an infrared induction photoelectric switch.

[0008] In some embodiments, a first welding hole is provided on the base, the first welding hole is a round hole, and the base is connected to the frame through the first welding hole.

[0009] In some embodiments, a second welding hole is provided on the base, and the second welding hole is a long hole. When the base is connected to the frame through the second welding hole, the position of the base can be adjusted.

[0010] In some embodiments, the second welding hole is an arc-shaped hole.

[0011] In some embodiments, the inductive switch is a laser inductive photoelectric switch.

[0012] In some embodiments, the base is rectangular and is made of stainless steel.

[0013] A second aspect of an embodiment of the present application provides a dump truck, which includes a main body, a control circuit and the limiting device, wherein the limiting device is installed under the flip seat of the main body, the control circuit is used to control the lifting and lowering of the box bucket of the main body, and the limiting device is connected to the control circuit.

[0014] In some embodiments, the control circuit includes a solenoid valve, a power supply, and a control switch, and the solenoid valve, the power supply, the control switch, and the limit device are connected by wires.

[0015] It can be seen from the above technical solution that the present application has at least the following advantages and positive effects:

[0016] A limit device in the present application detects the position of the box bucket by setting a non-contact sensing component to avoid dust interference with the sensing component, and can quickly realize the closure of the control circuit switch. It has a fast, sensitive and stable response and can effectively avoid phenomena such as sluggishness, jamming and interruption. The device is more convenient to operate and the detection result is more accurate. The device has a simple structure, is easy to use and is easy to promote.

[0017] A dump truck in the present application detects the position of the box bucket by setting a non-contact sensing component to avoid dust interference with the sensing component, and can quickly realize the closure of the control circuit switch. It has a fast, sensitive and stable response and effectively avoids phenomena such as sluggishness, jamming and interruption. The device is more convenient to operate and the detection result is more accurate. The device has a simple structure, is easy to use and is easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 is a structural schematic diagram of a baking device in an embodiment of the present application;

[0020] Figure 2 is a schematic diagram of the installation of a limiting device in an embodiment of the present application;

[0021] Figure 3 It is a circuit diagram of a control circuit of a limit device in an embodiment of the present application.

[0022] The reference numerals are explained as follows: 100, base; 110, first welding hole; 120, second welding hole; 200, induction component; 210, induction switch; 220, solid-state relay; 310, frame; 320, flip seat; 330, flip beam; 340, box; 410, solenoid valve; 420, power supply; 430, control switch. DETAILED DESCRIPTION

[0023] In order to make the technical personnel in the technical field to which the present application belongs to understand the present application more clearly, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0024] See also Figure 1 .

[0025] Figure 1 is a schematic diagram of the structure of a limiting device in an embodiment of the present application, Figure 2 Schematic diagram of the installation of a limiting device in the embodiment of the present application. The limiting device in this embodiment is applied to a 75131 type dump truck. Figure 1 and Figure 2 As shown, the device is used to limit the position of the dump truck's box 340, and the limiting device includes: a base 100, fixed to the dump truck's frame 310; a non-contact sensing component 200, fixed to the base 100, and the sensing component 200 is connected to the control circuit of the dump truck. When the sensing component 200 detects that the box 340 has reached a specified position, it transmits a signal to the control circuit to stop lifting. By setting a non-contact sensing component 200 to detect the position of the box 340, avoiding dust interference with the sensing component 200, the control circuit switch can be quickly closed, and the response is fast, sensitive, and stable, effectively avoiding slowness, stagnation, interruption, etc. The device is more convenient to operate and the detection result is more accurate. The device has a simple structure, is easy to use, and is easy to promote.

[0026] See also Figure 3 , Figure 3 It is a circuit diagram of a control circuit of a limit device in an embodiment of the present application.

[0027] In some embodiments, the sensing component 200 includes: a sensing switch 210, used to sense the position of the bin 340; a solid-state relay 220, connected to the sensing switch 210, and the solid-state relay 220 is used to control the connection or disconnection of the control circuit. The control circuit includes a solenoid valve 410, a power supply 420 and a switch. The solenoid valve 410, the power supply 420, the control switch 430 and the sensing component 220 are connected by wires.

[0028] In some embodiments, the induction switch 210 is an infrared induction photoelectric switch. In other embodiments, the induction switch 210 is a laser induction photoelectric switch.

[0029] like Figure 2 As shown, in this embodiment, the induction assembly 200 is fixed at a position below the flip seat 320 on the left side of the vehicle frame 310, and the control circuit is a power supply 420 circuit of the bucket lifting solenoid valve 410 of the lifting cylinder oil circuit, which controls the on and off of the power supply 420 of the bucket lifting solenoid valve 410. During the lifting process of the box bucket 340, the position of the flip beam 330 moves downward. When the induction switch 210 detects the flip beam 330, the signal output of the induction switch 210 is disconnected, and the controlled end of the solid-state relay 220 is disconnected. The controlled end of the solid-state relay 220 is connected to the switch and the solenoid valve 410 respectively, and the bucket lifting solenoid valve 410 is controlled to be powered off and closed, and the lifting cylinder oil circuit is disconnected, and the box bucket 340 stops lifting, so that the box bucket 340 is lifted to the highest point of the lifting cylinder stroke and stops automatically.

[0030] In some embodiments, a first welding hole 110 is provided on the base 100 , and the first welding hole 110 is a round hole. The base 100 is connected to the frame 310 through the first welding hole 110 .

[0031] In some embodiments, a second welding hole 120 is provided on the base 100, and the second welding hole 120 is a long hole. When the base 100 is connected to the frame 310 through the second welding hole 120, the position of the base 100 can be adjusted. Specifically, by setting the second welding hole 120, the position of the infrared sensing photoelectric switch can be changed by adjusting the fixing point of the base 100, thereby changing the maximum lifting angle of the vehicle body. The overall design is simple and easy to install.

[0032] In some embodiments, the second welding hole 120 is an arc-shaped hole.

[0033] In some embodiments, the base 100 is rectangular and is made of stainless steel.

[0034] The second aspect of this embodiment provides a dump truck, which includes a main body, a control circuit and the limiting device, the limiting device is installed under the flip seat 320 of the main body, the control circuit is used to control the lifting and lowering of the box bucket 340 of the main body, and the limiting device is connected to the control circuit.

[0035] It can be seen from the above technical solution that the present application has at least the following advantages and positive effects:

[0036] A limit device in the present application detects the position of the box bucket by setting a non-contact sensing component to avoid dust interference with the sensing component, and can quickly realize the closure of the control circuit switch. It has a fast, sensitive and stable response and can effectively avoid phenomena such as sluggishness, jamming and interruption. The device is more convenient to operate and the detection result is more accurate. The device has a simple structure, is easy to use and is easy to promote.

[0037] A dump truck in the present application detects the position of the box bucket by setting a non-contact sensing component to avoid dust interference with the sensing component, and can quickly realize the closure of the control circuit switch. It has a fast, sensitive and stable response and effectively avoids phenomena such as sluggishness, jamming and interruption. The device is more convenient to operate and the detection result is more accurate. The device has a simple structure, is easy to use and is easy to promote.

[0038] Unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0040] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0042] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A limiting device for limiting the position of a dump truck bucket, characterized in that: The limiting device comprises: A base is fixed to the frame of the dump truck; a first welding hole is provided on the base, the first welding hole is a round hole, and the base is connected to the frame through the first welding hole; a second welding hole is provided on the base, the second welding hole is a long hole, and when the base is connected to the frame through the second welding hole, the position of the base can be adjusted; A non-contact sensing component is fixed to the base, and the sensing component is connected to the control circuit of the dump truck. When the sensing component detects that the box bucket reaches a specified position, it transmits a signal to the control circuit to stop lifting; the sensing component includes: Induction switch, used to sense the position of the bin; A solid-state relay is connected to the induction switch, and the solid-state relay is used to control the connection or disconnection of the control circuit.

2. The limiting device according to claim 1, characterized in that: The induction switch is an infrared induction photoelectric switch.

3. The limiting device according to claim 1, characterized in that: The second welding hole is an arc-shaped hole.

4. The limiting device according to claim 3, characterized in that: The induction switch is a laser induction photoelectric switch.

5. The limiting device according to claim 1, characterized in that: The base is rectangular and is made of stainless steel.

6. A dump truck, characterized in that: The dump truck includes a main body, a control circuit and a limit device as described in any one of claims 1 to 5, wherein the limit device is installed below the flip seat of the main body, the control circuit is used to control the lifting and lowering of the box bucket of the main body, and the limit device is connected to the control circuit.

7. The dump truck according to claim 6, characterized in that: The control circuit comprises a solenoid valve, a power supply and a control switch, and the solenoid valve, the power supply, the control switch and the limit device are connected via wires.

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