Fork tip anti-collision and anti-smashing detection device for forklift

Abstract

The utility model belongs to the technical field of forklift accessories, and particularly discloses a fork tip anti-collision and anti-smashing detection device for a forklift, which comprises a first connecting piece used for being connected with fork teeth, a lateral travel switch used for generating lateral collision signals and a signal transmission device used for transmitting the signals are installed on the first connecting piece, and the lateral travel switch is connected with the signal transmission device. A collision assembly used for making contact with an obstacle is rotationally connected to the first connecting piece, the lateral travel switch is arranged on a rotating travel of the collision assembly, the collision assembly rotates, abuts against and triggers the lateral travel switch after being subjected to lateral collision, and the lateral travel switch is electrically connected to the signal transmission device. Through the design of mechanical triggering and electric signal linkage, quick response to lateral collision is achieved, the accident risk caused by a blind area during turning of the forklift is reduced, forward collision detection is constructed through the collision assembly, forward collision detection and lateral detection are complementary, multi-directional protection is formed, and reliability and safety are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of fork truck accessories, and concretely relates to a fork tip anti-collision and anti-smashing detection device for a fork truck. BACKGROUND

[0002] In the field of application of unmanned fork trucks, a detection device is usually installed at the front end of the fork tip to prevent the fork tip from colliding with staff or obstacles. However, in the field of application of existing unmanned fork trucks, the known fork tip collision detection structure is usually designed for a single function, that is, only one kind of non-contact sensing device or only a hard collision sensing structure.

[0003] Both of them are combined, but still have some shortcomings, such as complex structure, large installation space, which is not conducive to installation and maintenance, and the detection movement after colliding with obstacles has only a single degree of freedom, that is, linear reciprocating motion in a single direction, the triggering condition is single and limited, and the collision risk and blind area safety hazard are large. CONTENT OF THE UTILITY MODEL

[0004] In view of the problem that the existing technology fork truck anti-collision detection triggering condition is single, the collision risk and blind area safety hazard are large, a fork tip anti-collision and anti-smashing detection device for a fork truck is provided. The utility model provides the following technical scheme:

[0005] A fork tip anti-collision and anti-smashing detection device for a fork truck, comprising a first connecting piece for connecting the fork teeth, a lateral travel switch for generating a lateral collision signal and a signal transmission device for transmitting signals are installed on the first connecting piece, a collision component for contacting obstacles is rotatably connected to the first connecting piece, the lateral travel switch is arranged on the rotation travel of the collision component, and the collision component rotates, abuts and triggers the lateral travel switch after being subjected to lateral collision; and the lateral travel switch is electrically connected to the signal transmission device.

[0006] The collision component comprises a mounting bracket and a second connecting piece for connecting the first connecting piece, a forward travel switch for generating a forward collision signal is installed on the second connecting piece, and the mounting bracket is flip-connected to the second connecting piece through a first pin shaft.

[0007] Preferably, the outer end of the mounting bracket is rotatably connected to a main collision part through a second pin shaft, and the main collision part is cylindrical or columnar.

[0008] Preferably, the inner end of the mounting bracket is fixedly connected to a trigger protrusion for triggering the forward travel switch.

[0009] Preferably, a flip pin hole for connecting the first pin shaft is arranged on the mounting bracket, and the flip pin hole is arranged between the trigger protrusion and the main collision part.

[0010] Preferably, the inner end of the second connecting piece is integrally formed with a trigger plate for triggering the lateral travel switch, and lateral travel switches are arranged on both sides of the trigger plate

[0011] Preferably, the main collision part is provided with a side collision part on both axial sides for bearing lateral collision.

[0012] Preferably, the head side of the side collision part is provided with an arc-shaped guide part.

[0013] Preferably, a torsional spring for resetting the overturning angle of the mounting bracket is mounted on the first pin shaft.

[0014] Preferably, an oil-free bushing is mounted on the second pin shaft, and the oil-free bushing abuts against the mounting bracket.

[0015] Preferably, a photoelectric switch for identifying obstacles is mounted on the second connecting piece.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. Through the multi-layer detection mechanism of the lateral travel switch, the forward travel switch and the photoelectric switch, the collision risks in the scenes such as straight driving, turning and loading and unloading of the forklift are covered, and the safety hidden danger in the blind area is reduced.

[0018] 2. The design of the oil-free bushing, the torsional spring resetting and the arc-shaped guide part reduces the friction loss and the requirement for manual intervention, and prolongs the service life of the device.

[0019] 3. The combination of the cylindrical main collision part and the side collision part adapts to narrow passages, high-dust environments and dynamic obstacle scenes, and reduces the probability of false triggering. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is the overall structure schematic view of the utility model;

[0021] Figure 2 is the structure schematic view of the collision assembly of the utility model;

[0022] Figure 3 is the structure schematic view of the mounting bracket of the utility model;

[0023] Figure 4 is the installation structure schematic view of the oil-free bushing of the utility model;

[0024] Figure 5 is the installation structure schematic view of the torsional spring of the utility model;

[0025] Figure 6 is the installation structure schematic view of the thrust ball bearing of the utility model;

[0026] Figure 7 is a mounting structure diagram of the pin shaft boss of the utility model;

[0027] In the drawings, 1, first connecting piece; 2, collision assembly; 21, second connecting piece; 211, trigger plate; 22, mounting bracket; 221, trigger convex; 222, turnover pin hole; 23, first pin shaft; 231, torsional spring; 24, main collision part; 25, side collision part; 26, second pin shaft; 261, oil-free bushing; 3, lateral travel switch; 4, forward travel switch; 5, rotary pin shaft; 6, photoelectric switch; 7, thrust ball bearing; 8, limiting column; 9, pin shaft boss. DETAILED DESCRIPTION

[0028] The direction words mentioned in the following embodiments, such as "up", "down", "left", "right" and the like, are only the directions of the drawings, therefore, the direction words used are used for illustration and not for limiting the utility model creation.

[0029] As shown in Figures 1-7 A fork tip anti-collision and anti-smashing detection device for a forklift truck, comprising a first connecting piece 1 for connecting a fork tooth, a lateral travel switch 3 for generating a lateral collision signal and a signal transmission device for transmitting a signal are installed on the first connecting piece 1, a collision assembly 2 for contacting an obstacle is rotatably connected to the first connecting piece 1, the lateral travel switch 3 is arranged on the rotary travel of the collision assembly 2, and the collision assembly 2 rotates, abuts and triggers the lateral travel switch 3 after being subjected to a lateral collision, the lateral travel switch 3 is electrically connected to the signal transmission device, through the design of mechanical triggering and electrical signal linkage, the rapid response of lateral collision is realized, and the accident risk caused by a blind area when the forklift truck turns is reduced.

[0030] Further, the collision assembly 2 comprises a mounting bracket 22 and a second connecting piece 21 for connecting the first connecting piece 1, a forward travel switch 4 for generating a forward collision signal is installed on the second connecting piece 21, the mounting bracket 22 is rotatably connected to the second connecting piece 21 through a first pin shaft 23, the forward travel switch 4 is arranged on the rotary travel of the mounting bracket 22, the forward collision detection and the lateral detection are complementary, multi-directional protection is formed, and a security loophole caused by a single sensor failure is avoided.

[0031] Specifically, the second connecting piece 21 is a U-shaped frame, a rotary pin shaft 5 is installed and connected on the second connecting piece 21, a pin shaft boss 9 corresponding to the rotary pin shaft 5 is connected with the fork tooth and the first connecting piece 1 together, and a rotary bearing is rotatably connected to the pin shaft boss 9 through a thrust ball bearing 7; the first connecting piece 1 is provided with a limiting column 8 for limiting the rotary angle of the first connecting piece 1, so that the first connecting piece 1 is prevented from colliding with and damaging the lateral travel switch 3.

[0032] Further, the outer end of the mounting bracket 22 is rotationally connected with the main collision part 24 through the second pin shaft 26, the main collision part 24 is cylindrical, which reduces the frictional resistance with the obstacle, ensures smooth rotation of the assembly after collision, and reduces the probability of false triggering.

[0033] Specifically, the inner end of the second connecting piece 21 is integrally formed with a trigger plate 211 for triggering the lateral travel switch 3, and the trigger plate 211 is arranged on both sides of the lateral travel switch 3; the inner end of the mounting bracket 22 is integrally formed with a trigger protrusion 221 for triggering the forward travel switch 4.

[0034] The mounting bracket 22 is provided with a turnover pin hole 222 for connecting the first pin shaft 23, and the turnover pin hole 222 is arranged between the trigger protrusion 221 and the main collision part 24.

[0035] Further, the main collision part 24 is provided with a side collision part 25 on both axial sides for bearing side collision, which enhances the reliability and triggering range of signal triggering.

[0036] Specifically, the head side of the side collision part 25 is provided with an arc-shaped guide part, which guides the obstacle to slide away from the collision area, reduces the probability of secondary collision, and reduces the structural wear.

[0037] Further, the first pin shaft 23 is provided with a torsion spring 231 for resetting the turnover angle of the mounting bracket 22, which ensures that the device quickly recovers to the initial state and reduces the need for manual intervention.

[0038] Further, the second pin shaft 26 is provided with an oil-free bushing 261, which abuts against the mounting bracket 22, and the oil-free bushing 261 reduces frictional wear, is suitable for high-dust environments, and reduces the maintenance frequency.

[0039] Further, the second connecting piece 21 is provided with a photoelectric switch 6 for identifying the obstacle, which forms a double guarantee with mechanical triggering and improves the fault tolerance of the system.

[0040] It is worth noting that in order to ensure that the main collision part 24 can generate torque on the first pin shaft 23 after collision, so that the mounting bracket 22 can be overturned, the aforementioned forward direction is not strictly horizontal direction or radial direction of the first pin shaft 23, but mainly refers to the direction from the outside and impacting the main collision part 24, and the initial turnover angle of the mounting bracket 22 can be set and adjusted.

[0041] Working principle: when there is an obstacle in the straight line section during the operation of the unmanned forklift, the photoelectric switch 6 can directly shoot the obstacle, and the photoelectric switch 6 has an obstacle signal feedback to the unmanned forklift control system, and the unmanned forklift executes a stop action; when the obstacle is removed, the photoelectric switch 6 has no obstacle signal feedback to the unmanned forklift control system, at this time the unmanned forklift continues to run; when there is an obstacle in the straight line section during the operation of the unmanned forklift,

[0042] Assuming that the photoelectric switch 6 is damaged at this time and cannot sense the obstacle, the unmanned forklift continues to walk; the collision assembly 2 provided thereon contacts the obstacle, at this time the main collision part 24 first contacts the obstacle, the main collision part 24 drives the mounting bracket 22 to overturn around the first pin shaft 23, and the main collision part 24 also rotates around the second pin shaft 26 at the same time to prevent friction with the obstacle affecting the normal rotation of the main collision part 24; when the trigger convex 221 on the mounting bracket 22 contacts the forward travel switch 4, the forward travel switch 4 has a signal feedback to the unmanned forklift control system, and executes a stop action; when the obstacle is removed, the torsion spring 231 provides a force to the forward travel switch 4 to push the mounting bracket 22, at this time the mounting bracket 22 reverses around the first pin shaft 23, until the main collision part 24 returns to the initial position, at this time the mounting bracket 22 is separated from the forward travel switch 4; the forward travel switch 4 feedbacks no obstacle signal to the unmanned forklift control system, at this time the unmanned forklift continues to run; when the unmanned forklift carries goods, the goods accidentally fall and hit the main collision part 24, the main collision part 24 rotates around the first pin shaft 23 under the gravity of the goods, and the main collision part 24 can be rotated to the inside of the fork tooth through cooperation with the first pin shaft 23, to ensure that the second connecting piece 21 will not be damaged, and other movement modes and signal transmission are the same as above; when there is an obstacle during the turning of the unmanned forklift, the side collision part 25 contacts the obstacle, at this time the side collision part 25 drives the mounting bracket 22 together with the second connecting plate to rotate around the rotating pin shaft 5 under the thrust of the obstacle, at this time the side travel switch 3 will be triggered to feedback an obstacle signal to the unmanned forklift control system, and the unmanned forklift executes a stop action; when the obstacle is removed, the side travel switch 3 pushes the second connecting piece 21 back to the initial position, at this time the trigger plate 211 is separated from the side travel switch 3, the side travel switch 3 feedbacks no obstacle signal to the unmanned forklift control system, at this time the unmanned forklift continues to run.

Claims

1. A forklift fork tip anti-collision and anti-smashing detection device, characterized in that, The utility model provides a kind of barrier, including the first connecting piece (1) for connecting fork prong, signal transmission device for generating lateral collision signal on the first connecting piece (1) is installed with lateral travel switch (3) and is transmitted signal, the first connecting piece (1) is rotatably connected with the collision component (2) for contacting obstacle, the lateral travel switch (3) is arranged on the rotation stroke of collision component (2), and collision component (2) is rotated after being subjected to lateral collision, abuts and triggers lateral travel switch (3), and the lateral travel switch (3) is electrically connected to signal transmission device; The collision component (2) includes mounting bracket (22) and the second connecting piece (21) for connecting the first connecting piece (1), the second connecting piece (21) is installed with positive travel switch (4) for generating positive collision signal, and the mounting bracket (22) is rotatably connected to the second connecting piece (21) by first pin shaft (23), and the positive travel switch (4) is arranged on the rotation stroke of mounting bracket (22).

2. The fork tip collision and impact detection device for a fork lift truck according to claim 1, characterized by The outer end of the mounting bracket (22) is rotatably connected with main collision part (24) by second pin shaft (26), and the main collision part (24) is cylindrical or cylindrical.

3. The fork tip collision and impact detection device for a fork lift truck according to claim 2, characterized by The inner end of the mounting bracket (22) is fixedly connected with trigger bump (221) for triggering positive travel switch (4).

4. The fork tip collision and impact detection device for a fork lift truck according to claim 3, characterized by The mounting bracket (22) is provided with flip pin hole (222) for connecting first pin shaft (23), and the flip pin hole (222) is arranged between trigger bump (221) and main collision part (24).

5. The fork tip collision and impact detection device for a fork lift truck according to claim 1, characterized by The inner end of the second connecting piece (21) is integrally formed with trigger plate (211) for triggering lateral travel switch (3), and lateral travel switch (3) is arranged on both sides of trigger plate (211).

6. The fork tip collision and impact detection device for a fork lift truck according to claim 2, characterized by The axial two sides of the main collision part (24) are provided with side collision part (25) for bearing lateral collision.

7. The fork tip collision and impact detection device for a fork lift truck according to claim 6, characterized by The head side of the side collision part (25) is provided with arc-shaped guide part.

8. The fork tip collision and impact detection device for a fork lift truck according to claim 2, characterized by The first pin shaft (23) is installed with torsion spring (231) for resetting the flip angle of mounting bracket (22).

9. The fork guard and ram detection device of claim 2, wherein, The second pin shaft (26) is sleeved with oil-free bushing (261), and the oil-free bushing (261) abuts against the mounting bracket (22).

10. The fork protector and impact detection device of claim 1, wherein, The second connecting piece (21) is installed with photoelectric switch (6) for identifying obstacle.

Images