Mechanical anti-collision reset system and pneumatic tire roller
By introducing a mechanical anti-collision reset system into the tire roller and using circuit control to safely reset the parking solenoid valve, the safety problems of construction workers caused by blind spots and mechanical failures have been solved, thus improving both safety and cost-effectiveness.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANTUI CONSTR MASCH CO LTD
- Filing Date
- 2025-03-31
- Publication Date
- 2026-05-08
AI Technical Summary
Due to their large size, tire rollers create blind spots for drivers, which can easily endanger the safety of construction workers due to mechanical failures, driver fatigue, or other reasons.
A mechanical anti-collision reset system is adopted, including a mechanical limit switch, a parking solenoid valve, a universal relay, and a reset switch. The parking solenoid valve is safely reset through circuit control, which prevents the parking solenoid valve from resetting after the mechanical limit switch is reset, thus preventing secondary damage.
This effectively avoids secondary injuries to injured personnel caused by the parking solenoid valve no longer parking after the mechanical limit switch is reset, and reduces costs.
Smart Images
Figure CN224213075U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of engineering machinery, specifically to a mechanical anti-collision and reset system and a tire roller. Background Technology
[0002] A pneumatic tire roller is a type of road machinery used in construction equipment. It uses multiple inflatable tires to compact road surfaces. A typical pneumatic tire roller has 3-5 tires at the front and 4-6 tires at the rear. It is suitable for compacting base layers, subbase layers, and asphalt surface layers of various materials, and is an indispensable compaction machine for highway, municipal, and national defense construction.
[0003] Because of their large size, tire rollers are designed for two-person operation, one on the left and one on the right, to ensure operator convenience and to cover all four directions of construction and personnel safety. However, on construction sites, the same tire roller is often operated by only one person. Due to its large size, the operator has significant blind spots in all directions. Combined with other factors such as vehicle malfunctions, driver fatigue, misoperation, and inattention, these blind spots frequently endanger the safety of workers around the vehicle, potentially causing injury or death.
[0004] Therefore, a new technical solution is needed in this field to solve the above problems. Summary of the Invention
[0005] To improve or solve the technical problem that existing tire rollers can easily endanger the safety of construction workers around the vehicle, this utility model provides a mechanical anti-collision reset system. The mechanical anti-collision reset system includes: a mechanical limit switch connected to a pull cable and configured to change its normally open state when the pull cable is touched; a parking solenoid valve connected to the braking system; a general-purpose relay having a first path and a second path connected to the mechanical limit switch; the first path having a normally closed contact and a normally open contact, the normally closed contact being configured to connect to the parking solenoid valve when the second path is de-energized, and the normally open contact being configured to selectively connect to the second path when the second path is energized; and a reset switch having a zero position connecting the normally open contact to the second path and a first position disconnecting the normally open contact from the second path.
[0006] This utility model discloses a mechanical anti-collision reset system, comprising a mechanical limit switch, a parking solenoid valve, a universal relay, and a reset switch. The mechanical limit switch is connected to a cable on the tire roller, changing from a normally open state to a normally closed state when the cable is touched. The parking solenoid valve is connected to the tire roller's braking system; when the parking solenoid valve is energized, the vehicle is not under parking brake; when the parking solenoid valve is de-energized, the vehicle is under parking brake. The universal relay has a first path and a second path. The first path has normally closed and normally open contacts, and the second path controls the contact connection of the first path. When the mechanical limit switch is in the normally open state, the second path is open, and the normally closed contact of the first path is connected to the parking solenoid valve, energizing the parking solenoid valve. When the mechanical limit switch is in the normally closed state, the second path is closed, the parking solenoid valve is disconnected from its normally closed contact, and the parking solenoid valve is de-energized. The reset switch has a zero position and a first position. When the reset switch is in the zero position, the normally open contact of the first path is connected to the second path through the reset switch, supplying power to the second path. Even if the mechanical limit switch changes from a normally closed state to a normally open state, the second path remains closed, and the parking solenoid valve is de-energized. When the reset switch is in the first position, the normally open contact of the first path is disconnected from the second path, de-energizing the second path. The normally closed contact of the first path is connected to the parking solenoid valve, energizing the parking solenoid valve. Through the above settings, this utility model's mechanical anti-collision reset system uses a general-purpose relay and a reset switch to achieve a safe reset of the parking solenoid valve, preventing the parking solenoid valve from failing to hold after the mechanical limit switch resets, thus avoiding secondary or even multiple injuries to injured personnel.
[0007] Furthermore, multiple mechanical limit switches are arranged in parallel.
[0008] Furthermore, a fuse is connected to the first passage and the mechanical limit switch.
[0009] Furthermore, the second path is connected to an anti-collision indicator light.
[0010] Furthermore, the second path includes a first connecting line connected to the mechanical limit switch, a second connecting line connecting the first connecting line and the reset switch, and a third connecting line connecting the reset switch and the normally open contact; the reset switch is connected to a fourth connecting line connected to the anti-collision indicator light, and the third connecting line is connected to the fourth connecting line.
[0011] To improve or solve the technical problem that existing tire rollers can easily endanger the safety of construction workers around the vehicle, this utility model provides a tire roller. The tire roller includes: a vehicle body with a guy cable installed on it; a braking system installed within the vehicle body; and a mechanical anti-collision reset system as described above, wherein a mechanical limit switch of the mechanical anti-collision reset system is connected to the guy cable, and a parking solenoid valve of the mechanical anti-collision reset system is connected to the braking system.
[0012] With the above-mentioned settings, the tire roller of this utility model adopts the above-mentioned mechanical anti-collision reset system, which can prevent the parking solenoid valve from malfunctioning after the mechanical limit switch is reset, thus avoiding secondary or even multiple injuries to the injured personnel.
[0013] In summary, compared with the prior art, this utility model has the following beneficial effects:
[0014] (1) Use general relays and reset switches to achieve safe reset of the parking solenoid valve, so as to avoid the parking solenoid valve no longer parking after the mechanical limit switch is reset, which may cause secondary or even multiple injuries to the injured personnel.
[0015] (2) Compared with the controller controlling the parking solenoid valve, the use of general relays and reset switches can reduce costs. Attached Figure Description
[0016] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which:
[0017] Figure 1 This is a schematic diagram of an embodiment of the energized state of the parking solenoid valve in a mechanical anti-collision reset system of this utility model;
[0018] Figure 2 This is a schematic diagram of an embodiment of a mechanical anti-collision reset system of the present invention, in which the mechanical limit switch is normally closed and the parking solenoid valve is de-energized;
[0019] Figure 3 This is a schematic diagram of an embodiment of a mechanical anti-collision reset system of the present invention, in which the mechanical limit switch is normally open and the parking solenoid valve is de-energized.
[0020] List of reference numerals in the attached diagram: 1. Mechanical limit switch; 2. Parking solenoid valve; 3. General purpose relay; 31. First circuit; 311. Normally closed contact; 312. Normally open contact; 32. Second circuit; 321. First connecting wire; 322. Second connecting wire; 323. Third connecting wire; 33. Fourth connecting wire; 4. Reset switch; 5. Fuse; 6. Anti-collision indicator light. Detailed Implementation
[0021] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.
[0022] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," which indicate directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0023] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" 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 direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0024] To improve or solve the technical problem that existing tire rollers can easily endanger the safety of construction workers around the vehicle, this utility model provides a mechanical anti-collision reset system. This mechanical anti-collision reset system includes: a mechanical limit switch 1, connected to a pull cable and configured to change its normally open state when the pull cable is touched; a parking solenoid valve 2, connected to the braking system; a general-purpose relay 3, having a first passage 31 and a second passage 32 connected to the mechanical limit switch 1; the first passage 31 has a normally closed contact 311 and a normally open contact 312, the normally closed contact 311 being configured to connect to the parking solenoid valve 2 when the second passage 32 is de-energized, and the normally open contact 312 being configured to selectively connect to the second passage 32 when the second passage 32 is energized; and a reset switch 4, having a zero position connecting the normally open contact 312 to the second passage 32 and a first position disconnecting the normally open contact 312 from the second passage 32.
[0025] Figure 1 This is a schematic diagram of an embodiment of the parking solenoid valve in the energized state of a mechanical anti-collision reset system according to this utility model. Figure 2 This is a schematic diagram of an embodiment of a mechanical anti-collision reset system of the present invention, in which the mechanical limit switch is normally closed and the parking solenoid valve is de-energized. Figure 3 This is a schematic diagram of an embodiment of a mechanical anti-collision reset system of this utility model, in which the mechanical limit switch is normally open and the parking solenoid valve is de-energized. Figures 1 to 3As shown, in one or more embodiments, the mechanical anti-collision reset system of this utility model includes a mechanical limit switch 1, a parking solenoid valve 2, a universal relay 3, and a reset switch 4. This mechanical anti-collision reset system can be used on all engineering machinery with applicable anti-collision systems, such as tire presses, graders, and loaders.
[0026] See also Figure 1 , Figure 2 and Figure 3 The mechanical limit switch 1 is adapted to be connected to the pull wire and has a normally open state and a normally closed state. When the pull wire is touched, the mechanical limit switch 1 changes from the normally open state to the normally closed state. Alternatively, the pull wire structure can be configured with other suitable structures, such as a laser anti-collision structure. In one or more embodiments, multiple mechanical limit switches 1 are arranged in parallel. Specifically, four mechanical limit switches 1 are provided, each corresponding to one of the four pull wires, and the four pull wires correspond to the front, rear, left, and right directions of the engineering machinery. Alternatively, the pull wires and mechanical limit switches 1 can be configured with other suitable numbers, such as three or five. Further, the mechanical limit switch 1 is connected to a fuse 5. Current flows from the fuse 5 to the mechanical limit switch 1, and because the mechanical limit switch 1 is in the normally open state, the current flowing through the mechanical limit switch 1 forms an open circuit. When any mechanical limit switch 1 changes to the normally closed state, current flows from the fuse 5 to the mechanical limit switch 1, and from the mechanical limit switch 1 to the general-purpose relay 3.
[0027] See also Figure 1 , Figure 2 and Figure 3 The parking solenoid valve 2 is connected to the braking system of the construction machinery. When the parking solenoid valve 2 is energized, the braking system is not activated, and the construction machinery operates normally. When the parking solenoid valve 2 is de-energized, the braking system is activated, and the construction machinery stops. A general-purpose relay 3 is used to switch the circuit. In one or more embodiments, the general-purpose relay 3 has a first passage 31 and a second passage 32. The first passage 31 is arranged in parallel with the mechanical limit switch 1 and is connected to the fuse 5. The first passage 31 has a normally closed contact 311 and a normally open contact 312. The second passage 32 is connected to the mechanical limit switch. When the second passage 32 is de-energized, current flows into the parking solenoid valve 2 from the normally closed contact 311; when the second passage 32 is energized, current flows out from the normally open contact 312. Furthermore, the second path 32 includes a first connecting line 321 connected to the mechanically formed switch, a second connecting line 322 connecting the first connecting line 321 and the reset switch 4, a third connecting line 323 connecting the reset switch 4 and the normally open contact 312, and a fourth connecting line 33 connected to the third connecting line 323. An anti-collision indicator light 6 is provided on the fourth connecting line 33. When current flows out from the normally open contact 312, the anti-collision indicator light 6 illuminates.
[0028] See also Figure 1 , Figure 2 and Figure 3 In one or more embodiments, the reset switch 4 has a zero position and a single position. When the reset switch 4 is in the zero position, current can flow through the reset switch 4, forming a circuit; when the reset switch 4 is in the single position, current cannot flow through the reset switch 4, forming an open circuit. The zero position of the reset switch 4 is as follows: Figure 1 As shown by the solid line, the first gear is as follows: Figure 1 As shown by the dashed line.
[0029] The working principle of this utility model is as follows:
[0030] When the construction machinery is in normal use and the parking brake is not required: the mechanical limit switch 1 is in the normally open state, forming an open circuit; current flows through fuse 5 and normally closed contact 311 into parking solenoid valve 2, energizing parking solenoid valve 2. Figure 1 As indicated by the middle arrow;
[0031] When the cable is struck and the construction machinery requires parking brake operation: Mechanical limit switch 1 changes from normally open to normally closed, and a current flows through mechanical limit switch 1 into the second circuit 32. The second circuit 32 alters the circuit of the first circuit 31, creating an open circuit at the normally closed contact 311, de-energizing the parking solenoid valve 2; a closed circuit is formed at the normally open contact 312, and the current flows through the anti-collision indicator light 6, causing the anti-collision indicator light 6 to illuminate. Figure 2 As indicated by the middle arrow;
[0032] When the cable resets and the construction machinery still requires parking brake: Mechanical limit switch 1 changes from normally closed to normally open. Current flows sequentially through fuse 5, normally open contact 312, third connecting line 323, reset switch 4, second connecting line 322, and first connecting line 321, ensuring that the first circuit 31 remains open at normally open contact 312. The parking solenoid valve 2 remains de-energized. Figure 3 As indicated by the middle arrow;
[0033] When the parking brake is not needed after the personnel or obstacles have been moved: the reset switch 4 changes from the zero position to the first position, the reset switch 4 forms an open circuit, the first passage 31 forms a passage at the normally closed contact 311, and the parking solenoid valve 2 is energized.
[0034] To improve or solve the technical problem that existing tire rollers can easily endanger the safety of construction workers around the vehicle, this utility model provides a tire roller. The tire roller includes a vehicle body with a cable installed on it; a braking system installed inside the vehicle body; and the aforementioned mechanical anti-collision reset system. The mechanical limit switch 1 of the mechanical anti-collision reset system is connected to the cable, and the parking solenoid valve 2 of the mechanical anti-collision reset system is connected to the braking system.
[0035] In one or more embodiments, pull cables are installed around the vehicle body, and the pull cables are connected to mechanical limit switches 1. Four pull cables are provided, each connected to a corresponding mechanical limit switch 1. This utility model of a tire roller employs the aforementioned mechanical anti-collision reset system, which can prevent the parking solenoid valve 2 from failing to hold the vehicle after the mechanical limit switch 1 resets, thus avoiding secondary or even multiple injuries to injured personnel.
[0036] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the protection scope of this utility model.
Claims
1. A mechanical anti-collision and reset system, characterized in that, include: A mechanical limit switch (1) is connected to a pull wire and configured to change its normally open state when the pull wire is touched; The parking solenoid valve (2) is connected to the braking system; A general-purpose relay (3) has a first path (31) and a second path (32) connected to the mechanical limit switch (1); the first path (31) has a normally closed contact (311) and a normally open contact (312), the normally closed contact (311) being configured to connect to the parking solenoid valve (2) when the second path (32) is de-energized, and the normally open contact (312) being configured to selectively connect to the second path (32) when the second path (32) is energized; The reset switch (4) has a zero position that connects the normally open contact (312) and the second path (32), and a first position that disconnects the normally open contact (312) and the second path (32).
2. The mechanical anti-collision and reset system according to claim 1, characterized in that, Multiple mechanical limit switches (1) are arranged in parallel.
3. The mechanical anti-collision and reset system according to claim 1, characterized in that, The first passage (31) and the mechanical limit switch (1) are connected to a fuse (5).
4. The mechanical anti-collision reset system according to claim 1, characterized in that, The second path (32) is connected to a collision avoidance indicator light (6).
5. A mechanical anti-collision and reset system according to claim 4, characterized in that, The second path (32) includes a first connecting line (321) connected to the mechanical limit switch (1), a second connecting line (322) connecting the first connecting line (321) and the reset switch (4), and a third connecting line (323) connecting the reset switch (4) and the normally open contact (312); the reset switch (4) is connected to a fourth connecting line (33) connected to the anti-collision indicator light (6), and the third connecting line (323) is connected to the fourth connecting line (33).
6. A tire roller, characterized in that, include: The vehicle body is equipped with a cable. The braking system is installed inside the vehicle body; and A mechanical anti-collision reset system according to any one of claims 1-5, wherein the mechanical limit switch (1) of the mechanical anti-collision reset system is connected to the pull wire, and the parking solenoid valve (2) of the mechanical anti-collision reset system is connected to the braking system.