Limiting device of electric flat carriage

Abstract

The utility model provides an electric flat carriage limiting device, which relates to the technical field of safety protection mechanisms and comprises an electric flat carriage moving track line, and limiting warning devices are arranged on two sides of a passage section of a production workshop in the electric flat carriage moving track line. The direct type limiting mechanism comprises a fixed shell, a hydraulic cylinder and a limiting structure. The warning prompting mechanism comprises a ground lamp, a proximity sensor and an alarm. By means of the direct type limiting mechanism, physical blocking is conducted on an existing limiting switch type limiting device, even if a limiting switch at the front end fails, a certain effect of blocking and abutting against movement of the electric flat carriage can be achieved, the warning prompting mechanism is additionally arranged, and the physical blocking is combined, so that a ground illuminating lamp can prompt and assist workers to pass through a track line; when the electric flat carriage gets close to the passing section, the proximity sensor can detect the situation in time and trigger the alarm to give out alarm sound, workers are effectively reminded to pay attention to safety, and therefore the risk of safety accidents is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of safety protection mechanisms, in particular to a limiting device for an electric flat car. Background Art

[0002] The limit device can accurately control the range of motion of the electric flat car to ensure that it travels within the specified track and avoids exceeding the safety or permitted limits. The current limit device cooperates with the cam piece through the limit switch. When the cam piece rotates to a specific position, it triggers the limit switch, thereby changing the circuit state or cutting off the power supply.

[0003] Since the tracks of electric flat cars are arranged in the production workshop during their use, workers have to pass through the tracks frequently. Although the current limit device can prevent the electric flat car from exceeding the safe or permitted limits, it is not functional enough. Its limit control is also controlled by an external controller, and it is impossible to know whether the track is in a safe and passable state. It lacks a prompt function, and the reminder effect on the operator is insufficient, which poses a safety hazard. Therefore, we propose an electric flat car limit device, which is put into use together with the current limit switch for further protection. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art. Since the track of the electric flat car is arranged in the production workshop during the use, the staff must frequently pass through the track. Although the current limit device has the function of preventing the electric flat car from exceeding the safe or permitted limit, it is insufficient in functionality. The limit control is also controlled by an external controller, and it is impossible to know whether the track is in a safe and passable state. There is a lack of prompt function, and the reminder effect on the operator is insufficient, which poses a safety hazard.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] An electric flat car limiting device comprises an electric flat car moving track line, wherein the electric flat car moving track line is provided with limiting warning devices on both sides of the passage section in the production workshop;

[0007] The limit warning device is composed of a direct limit mechanism and a warning prompt mechanism, and the warning prompt mechanism is installed on the direct limit mechanism;

[0008] The direct limiting mechanism includes a fixed housing, a hydraulic cylinder and a limiting structure. The fixed housing and the electric flat car moving track are arranged in an I-shaped structure. The hydraulic cylinder is provided with two groups, and the output ends are respectively directed toward one side of the electric flat car moving track. The limiting structure is installed at the output end of the hydraulic cylinder and extends toward the electric flat car moving track through the hydraulic cylinder, so that the limiting structure is docked with the positioning structure on the electric flat car moving track, forming a physical barrier to limit the electric flat car.

[0009] The warning prompt mechanism includes a ground-mounted lamp, a proximity sensor and an alarm. The ground-mounted lamp is installed on the fixed housing toward the passage section, and the proximity sensor is installed on the fixed housing toward the other side. The alarm is electrically connected to the proximity sensor, and when the proximity sensor detects that the electric flat car is approaching, an alarm sound is issued through the alarm.

[0010] Furthermore, the distance between the two fixed shells is a passage section, which is used for workers to pass through the moving track line of the electric flat car.

[0011] Furthermore, a limit switch is installed on the moving track line of the electric flat car near the outside of the limit warning device.

[0012] Furthermore, the limiting structure includes an inverted L-shaped plate, a column and an insert block. The inverted L-shaped plate is attached to the upper end surface and inner side surface of the line on one side of the electric flat car moving track line. The column and the insert block are arranged on the inner side of the inverted L-shaped plate, corresponding to the upper end surface and inner side surface of the line on one side of the electric flat car moving track line respectively.

[0013] Furthermore, the positioning structure includes a through hole and a slot, the through hole is opened through the inner and outer surfaces of the line on one side of the electric flat car moving track line, and the slot is opened on the upper end surface of the electric flat car moving track line, and the through hole and slot are at the same height as the plug column and the plug block.

[0014] Furthermore, a contact pad is bonded in the slot.

[0015] Furthermore, the hydraulic cylinder is controlled by an external controller, the hydraulic cylinder is electrically connected to the ground light, and the alarm is installed outside or inside the limit warning device. When the alarm is installed outside, it is connected to the limit warning device through a wire.

[0016] Furthermore, the fixed housing is installed on the floor of the production workshop by means of bolts.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] Through the direct limit mechanism, a physical barrier is made on the current limit switch type limit device. Even if the front limit switch fails, it can play a certain role in blocking the movement of the electric flat car, and a warning prompt mechanism is added. The physical barrier is combined with the ground light to remind the auxiliary staff to pass the track line, that is, the opening and closing status of the direct limit mechanism is observed by the light color. When the electric flat car approaches the passage section, the proximity sensor can detect it in time and trigger the alarm to sound an alarm, effectively reminding the staff to pay attention to safety, thereby greatly reducing the risk of safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of an electric flat car limiting device provided by the utility model;

[0020] Figure 2 This is an enlarged schematic diagram of structure A of an electric flat car limiting device provided by the utility model;

[0021] Figure 3 This is an internal anatomical diagram of the fixed housing of the electric flat car limiting device provided by the utility model;

[0022] Figure 4 The utility model provides an electrical connection frame of a limiting device for an electric flat car.

[0023] Legend:

[0024] 1. Electric flat car moving track line;

[0025] 2. Limit warning device;

[0026] 3. Direct limiting mechanism; 31. Fixed housing; 32. Hydraulic cylinder; 33. Limiting structure; 331. Inverted L-shaped plate; 332. Insertion column; 333. Insertion block;

[0027] 4. Warning mechanism; 41. Ground light; 42. Proximity sensor; 43. Siren;

[0028] 5. Positioning structure; 51. Through hole; 52. Slot; 53. Contact pad. DETAILED DESCRIPTION

[0029] The following will combine the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to relevant references, and several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0031] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are for the purpose of describing specific embodiments only and are not intended to limit this invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0033] Example 1

[0034] like Figure 1-4 As shown, the utility model provides a technical solution: an electric flat car limiting device, comprising an electric flat car moving track line 1, wherein the electric flat car moving track line 1 is provided with a limit warning device 2 on both sides of the passage section of the production workshop; the limit warning device 2 is composed of a direct limit mechanism 3 and a warning prompt mechanism 4, and the warning prompt mechanism 4 is installed on the direct limit mechanism 3;

[0035] Specifically, the direct limiting mechanism 3 includes a fixed shell 31, a hydraulic cylinder 32 and a limiting structure 33. The fixed shell 31 and the electric flat car moving track line 1 are arranged in an I-shaped structure. The hydraulic cylinder 32 is provided with two groups, and the output ends are respectively directed toward one side of the electric flat car moving track line 1. The limiting structure 33 is installed at the output end of the hydraulic cylinder 32. The hydraulic cylinder 32 extends toward the electric flat car moving track line 1, so that the limiting structure 33 is docked with the positioning structure 5 on the electric flat car moving track line 1, forming a physical barrier to limit the electric flat car.

[0036] It should be supplemented that the fixed housing 31 is mounted on the floor of the production workshop by means of bolts to install the limit warning device 2 .

[0037] Specifically, the warning prompt mechanism 4 includes a ground light 41, a proximity sensor 42 and an alarm 43. The ground light 41 is installed on the fixed shell 31 facing the passage section side, and the proximity sensor 42 is installed on the fixed shell 31 facing the other side. The alarm 43 is electrically connected to the proximity sensor 42, and when the proximity sensor 42 detects that the electric flat car is approaching, an alarm sound is issued through the alarm 43.

[0038] It should be added that the hydraulic cylinder 32 is controlled by an external controller, the hydraulic cylinder 32 is electrically connected to the ground light 41, and the alarm 43 is installed outside or inside the limit warning device 2. When the alarm 43 is installed externally, it is connected to the limit warning device 2 through a wire. When the hydraulic cylinder 32 is controlled by the external controller to be in an extended or retracted state, the ground light 41 emits green or red light, prompting that the direct limit mechanism 3 is open. When the green light is on, it is safe to pass. When the red light is on, it is necessary to control the hydraulic cylinder 32 to extend, or to raise the staff to observe the passage.

[0039] It should be noted that in the above embodiment, the distance between the two fixed housings 31 is a passage section, which is used for workers to pass through the electric flat car moving track line 1;

[0040] A limit switch is installed on the moving track line 1 of the electric flat car near the outer side of the limit warning device 2.

[0041] This embodiment is based on the design of a further limit device after the installation of the limit switch. It needs to be combined with the current limit switch and the corresponding cam piece. When the cam piece rotates to a specific position, it will trigger the limit switch. This structure is intended to be used in conjunction with the electric flat car moving track line 1.

[0042] Example 2

[0043] like Figure 1 and 2 As shown, the limiting structure 33 includes an inverted L-shaped plate 331, a column 332 and an insert block 333. The inverted L-shaped plate 331 is attached to the upper end surface and inner side surface of the line on one side of the electric flat car moving track line 1. The column 332 and the insert block 333 are arranged on the inner side of the inverted L-shaped plate 331, corresponding to the upper end surface and inner side surface of the line on one side of the electric flat car moving track line 1 respectively.

[0044] Corresponding to the limiting structure 33, the positioning structure 5 includes a through hole 51 and a slot 52. The through hole 51 is opened through the inner and outer surfaces of the line on one side of the electric flat car moving track line 1, and the slot 52 is opened on the upper end surface of the electric flat car moving track line 1. The through hole 51 and the slot 52 are at the same height as the plug column 332 and the plug block 333.

[0045] By driving the hydraulic cylinder 32, the limit structure 33 is connected to the positioning structure 5, thereby preventing the limit switch from failing or being unable to stop in time, further blocking the movement of the electric flat car, and the contact pad 53 is bonded in the slot 52 to improve the contact stability.

[0046] The working process of the present utility model is as follows: when the electric flat car is running normally on the track, when the hydraulic cylinder 32 is in a retracted state, the limit structure 33 is not docked with the positioning structure 5, and the ground lamp 41 emits red light, indicating that the passage section is unsafe. The hydraulic cylinder 32 is controlled to be in an extended state by an external controller, so that the plug 332 and the plug block 333 of the limit structure 33 are respectively inserted into the through hole 51 and the slot 52 of the electric flat car moving track line 1, forming a physical barrier to limit the electric flat car. The ground lamp 41 may turn into green light, indicating that the direct limit mechanism 3 has been opened. Combined with the limit switch, it has two-stage safety protection. When the electric flat car approaches the passage section, the proximity sensor 42 detects the approach signal of the electric flat car and triggers the alarm 43 to sound an alarm to remind the staff to pay attention to safety. The electric flat car continues to approach and is about to collide with the passage section. The front limit switch cooperates with the cam piece. When the cam piece rotates to a specific position, the limit switch will be triggered, thereby changing the circuit state or cutting off the power supply to stop the electric flat car.

[0047] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric flat car limiting device, comprising an electric flat car moving track line (1), characterized in that: The electric flat car moving track line (1) is provided with limit warning devices (2) on both sides of the passage section in the production workshop; The position limiting warning device (2) is composed of a direct position limiting mechanism (3) and a warning prompt mechanism (4), and the warning prompt mechanism (4) is installed on the direct position limiting mechanism (3); The direct limiting mechanism (3) comprises a fixed housing (31), a hydraulic cylinder (32) and a limiting structure (33), wherein the fixed housing (31) and the electric flat car moving track line (1) are arranged in an I-shaped structure, and the hydraulic cylinder (32) is provided with two groups, and the output ends are respectively directed toward one side of the electric flat car moving track line (1), and the limiting structure (33) is installed at the output end of the hydraulic cylinder (32), and extends toward the electric flat car moving track line (1) through the hydraulic cylinder (32), so that the limiting structure (33) and the positioning structure (5) on the electric flat car moving track line (1) are docked, thereby forming a physical barrier to limit the electric flat car; The warning mechanism (4) comprises a ground-mounted lamp (41), a proximity sensor (42) and an alarm (43); the ground-mounted lamp (41) is mounted on the fixed housing (31) toward the passage side; the proximity sensor (42) is mounted on the fixed housing (31) toward the other side; and the alarm (43) is electrically connected to the proximity sensor (42), so that when the proximity sensor (42) detects that the electric flat car is approaching, an alarm sound is emitted through the alarm (43).

2. The electric flat car limiting device according to claim 1, characterized in that: The distance between the two fixed housings (31) is a passage section, and the passage section is used for workers to pass through the electric flat car moving track line (1).

3. The electric flat car limiting device according to claim 1, characterized in that: A limit switch is installed on the electric flat car moving track line (1) near the outer side of the limit warning device (2).

4. The electric flat car limiting device according to claim 1, characterized in that: The limiting structure (33) comprises an inverted L-shaped plate (331), an inserting column (332) and an inserting block (333), wherein the inverted L-shaped plate (331) is attached to the upper end surface and the inner side surface of the line on one side of the electric flat car moving track line (1), and the inserting column (332) and the inserting block (333) are arranged on the inner side of the inverted L-shaped plate (331), respectively corresponding to the upper end surface and the inner side surface of the line on one side of the electric flat car moving track line (1).

5. The electric flat car limiting device according to claim 4, characterized in that: The positioning structure (5) includes a through hole (51) and a slot (52), wherein the through hole (51) is provided through the inner and outer surfaces of one side of the electric flat car moving track line (1), and the slot (52) is provided on the upper end surface of the electric flat car moving track line (1), and the through hole (51) and the slot (52) are at the same height as the plug post (332) and the plug block (333).

6. The electric flat car limiting device according to claim 5, characterized in that: A contact pad (53) is bonded in the slot (52).

7. The electric flat car limiting device according to claim 1, characterized in that: The hydraulic cylinder (32) is controlled by an external controller. The hydraulic cylinder (32) is electrically connected to the ground-mounted lamp (41). The alarm (43) is installed outside or inside the limit warning device (2). When the alarm (43) is installed outside, it is connected to the limit warning device (2) via a wire.

8. The electric flat car limiting device according to claim 1, characterized in that: The fixed housing (31) is mounted on the floor of the production workshop by means of bolts.

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