Fork tip safety protection device of forklift type AGV

Abstract

The utility model relates to the technical field of forklift protection, in particular to a fork tip safety protection device of a forklift type AGV (automatic guided vehicle), which comprises a fixed seat, a collision block, a brake mechanism, a deflector rod and a pair of elastic mechanisms, one end of the fixed seat is connected with the brake mechanism, and the other end is connected with the elastic mechanism; the other end of the elastic mechanism is connected with the collision block; the elastic mechanisms are arranged on the two sides of the shifting rod in a one-to-one correspondence mode. One end of the deflector rod is connected with the collision block, and the other end is connected with the brake mechanism; the collision block can drive the shifting rod to move in the axial direction of the shifting rod so that the braking mechanism can conduct braking or release braking. The fork tip safety protection device detects and brakes through collision force, the detection blind area is small, the influence of the brightness of ambient light is avoided, and the reliability is high. The fork tip safety protection device is fixedly installed at the bottom end of the fork tip, and installation is easy and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of forklift protection, in particular to a fork tip safety protection device of a forklift type AGV. Background Art

[0002] Forklift AGV has a strong carrying capacity and can directly pick up material pallets for transportation. It can automatically slow down when turning and automatically identify obstacles and stop in time. It is safe and reliable to travel. It is mainly used for raw material distribution on production lines, transportation of semi-finished products and finished products, and palletizing in factory warehouses. Since the fork tip of the forklift AGV is prone to hit obstacles and cause safety accidents during the cargo handling process, it is necessary to install a fork tip safety protection device for timely braking.

[0003] Existing fork tip safety protection devices include photoelectric sensors, laser sensors, and mechanical protection devices. Among them, the sensor detection range is limited, the blind area is large, and the sensor is easily affected by the surrounding environment; the space at the fork tip is small, and the sensor is inconvenient to install, such as forged forks. Existing mechanical protection devices are usually front and rear telescopic structures. When encountering offset obstacles, that is, when the obstacles hit the local position of the mechanical protection device, the reliability of collision detection is low, which can easily cause damage or failure of the mechanical protection device. Therefore, there is an urgent need for a fork tip safety protection device with high detection sensitivity and good reliability. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a fork tip safety protection device for a forklift-type AGV, which solves the technical problems of low detection sensitivity and poor reliability of the existing fork tip safety protection device.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose, the fork tip safety protection device of the forklift type AGV of the utility model comprises a fixing seat, a collision block, a braking mechanism, a lever and a pair of elastic mechanisms;

[0008] One end of the fixing seat is connected to the braking mechanism, and the other end is connected to the elastic mechanism;

[0009] The other end of the elastic mechanism is connected to the collision block; a pair of the elastic mechanisms are arranged on both sides of the lever in a one-to-one correspondence;

[0010] One end of the lever is connected to the collision block, and the other end is connected to the brake mechanism;

[0011] Wherein, the collision block can drive the shifting rod to move along the axial direction of the shifting rod, so that the braking mechanism can brake or release the brake.

[0012] Optionally, the brake mechanism includes a mounting plate, a first brake switch and a second brake switch;

[0013] The mounting plate is connected to the fixing seat;

[0014] One end of the lever facing the mounting plate is configured as a T-shaped rod;

[0015] The first brake switch and the second brake switch are arranged on both sides of the T-shaped rod in a one-to-one correspondence;

[0016] The collision block can drive the T-shaped rod to move along the axial direction of the shifting rod, so that the T-shaped rod abuts against or moves away from the first brake switch and the second brake switch.

[0017] Optionally, the safety protection device further comprises a fixed shaft; a through hole is formed on the fixed seat; and a first waist-shaped hole is formed on the collision block;

[0018] The fixed shaft passes through the through hole and the first waist-shaped hole; the fixed shaft can move in the first waist-shaped hole along the axial direction of the shifting rod.

[0019] Optionally, the collision block is further provided with a second waist-shaped hole and a third waist-shaped hole;

[0020] Along the horizontal direction, the second waist-shaped hole and the third waist-shaped hole are slidably connected to a pair of the elastic mechanisms in a one-to-one correspondence;

[0021] A retaining spring is arranged in the through hole, and the retaining spring is connected to the fixed shaft.

[0022] Optionally, an open slot is provided on the fixing seat;

[0023] Along the horizontal direction, the shifting rod is slidably connected to the opening slot.

[0024] Optionally, the first brake switch and the second brake switch are both elastically provided with a reed at one end facing the T-shaped rod;

[0025] The T-bar can be pressed against or away from the reed.

[0026] Optionally, the elastic mechanism includes a spring and a guide shaft;

[0027] One end of the guide shaft is connected to the collision block, and the other end is connected to the fixing seat;

[0028] The spring is sleeved on the guide shaft.

[0029] Optionally, a stepped shaft hole is provided on the fixing seat;

[0030] The spring is connected to the outer hole of the stepped shaft hole; the guide shaft penetrates into the inner hole of the stepped shaft;

[0031] A threaded hole is formed on one end of the guide shaft facing the brake mechanism; a plurality of bolts are arranged on the fixing seat; and the threaded hole is threadedly connected with the bolts.

[0032] (III) Beneficial effects

[0033] The beneficial effects of the utility model are:

[0034] The elastic mechanism is arranged between the collision block and the fixing seat, and is used to buffer the collision force applied by the collision block to the fixing seat. It can effectively protect the equipment through buffering when it is hit by external force, and can also reset the collision block through the elastic mechanism after the external force is removed, which is convenient for the next collision detection and improves the convenience of the equipment. A pair of elastic mechanisms are arranged on both sides of the lever in a one-to-one correspondence, which improves the sensitivity of the equipment when it collides with an offset obstacle. The pressure on either side of the collision block can push the lever to move along its axial direction, so as to brake the forklift in time when a collision occurs, and the pair of elastic mechanisms can better buffer to protect the equipment.

[0035] The collision block can drive the lever to move along the axial direction of the lever, so that the lever and the brake mechanism move relative to each other, so that the brake mechanism can detect the collision force on the collision block. When the collision force reaches the set value, the brake mechanism sends a braking command to the forklift to brake the forklift. Compared with the traditional detection methods of photoelectric sensors and laser sensors, the fork tip safety protection device detects and brakes through collision force, has a small detection blind area, is not affected by the brightness of ambient light, and has high reliability. The fork tip safety protection device can be fixedly installed at the bottom of the fork tip, which is simple and convenient to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a front structural schematic diagram of the fork tip safety protection device of the forklift type AGV of the utility model;

[0037] Figure 2 It is a schematic diagram of the back structure of the fork tip safety protection device of the forklift type AGV of the utility model;

[0038] Figure 3 It is a structural schematic diagram of the fork tip safety protection device of the utility model in a pressure equalization state;

[0039] Figure 4 It is a schematic diagram of the structure of the fork tip safety protection device of the utility model in a biased state;

[0040] Figure 5 It is a schematic diagram of the assembly of the fork tip safety protection device and the fork tip of the utility model.

[0041] [Description of Reference Numerals]

[0042] 1: fixing seat; 2: collision block; 3: guide shaft; 4: fixing shaft; 5: retaining spring; 6: elastic mechanism; 7: bolt; 8: lever; 9: brake mechanism; 10: first brake switch; 11: second brake switch. DETAILED DESCRIPTION

[0043] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0044] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0045] In addition, in the present invention, the descriptions of "first", "second", etc. are only used 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 at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0046] In the present invention, 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; "connection" can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] See also Figure 1 and Figure 2 The utility model provides a fork tip safety protection device for a forklift type AGV, the fork tip safety protection device comprises a fixed seat 1, a collision block 2, a braking mechanism 9, a lever 8 and a pair of elastic mechanisms 6; one end of the fixed seat 1 is connected to the braking mechanism 9, and the other end is connected to the elastic mechanism 6; the other end of the elastic mechanism 6 is connected to the collision block 2; the pair of elastic mechanisms 6 are arranged on both sides of the lever 8 in a one-to-one correspondence; one end of the lever 8 is connected to the collision block 2, and the other end is connected to the braking mechanism 9; wherein the collision block 2 can drive the lever 8 to move along the axial direction of the lever 8, so that the braking mechanism 9 brakes or releases the brake.

[0048] like Figure 5 As shown, the fork tip safety protection device is installed at the bottom end of the fork tip of the forklift, and is arranged to protrude from the front end of the fork tip; the braking mechanism 9 is electrically connected to the control center of the forklift. Under normal working conditions, the fork tip safety protection device and the fork tip extend and retract in the bracket at the bottom end of the pallet, and will not generate a large collision force with the pallet. Under this working condition, the fork tip safety protection device does not work. When the fork tip safety protection device collides with the pallet and the collision force is greater than the set value, since the fork tip safety protection device can collide with the pallet before the fork tip, the forklift can be braked in time, effectively protecting the fork tip and the pallet. As for the set value of the collision force, it is set according to actual needs, and the elastic force of the elastic mechanism 6 and the length of the lever 8 are set accordingly.

[0049] The elastic mechanism 6 is arranged between the collision block 2 and the fixing seat 19, and is used to buffer the collision force applied by the collision block 2 to the fixing seat 1. It can effectively protect the equipment through the buffering effect when it is hit by external force, and can also reset the collision block 2 through the elastic mechanism 6 after the external force is removed, which is convenient for the next collision detection and improves the convenience of the equipment. A pair of elastic mechanisms 6 are arranged on both sides of the lever 8 in a one-to-one correspondence, which improves the sensitivity of the equipment when it collides with an offset obstacle. The pressure on either side of the collision block 2 can push the lever 8 to move along its axial direction, so as to brake the forklift in time when a collision occurs, and the pair of elastic mechanisms 6 can better buffer to protect the equipment.

[0050] The collision block 2 can drive the lever 8 to move along the axial direction of the lever 8, so that the lever 8 and the brake mechanism 9 move relative to each other, so that the brake mechanism 9 can detect the collision force on the collision block 2. When the value of the collision force reaches the set value, the brake mechanism 9 sends a braking command to the forklift to brake the forklift. Compared with the detection methods of traditional photoelectric sensors and laser sensors, the fork tip safety protection device detects and brakes through the collision force, has a small detection blind area, is not affected by the brightness of the ambient light, and has high reliability. The fork tip safety protection device can be fixedly installed at the bottom of the fork tip, and the installation is simple and convenient.

[0051] Furthermore, it is characterized in that the brake mechanism 9 includes a mounting plate, a first brake switch 10 and a second brake switch 11; the mounting plate is connected to the fixing seat 1; the end of the lever 8 facing the mounting plate is set as a T-shaped rod; the first brake switch 10 and the second brake switch 11 are set on both sides of the T-shaped rod in a one-to-one correspondence; the collision block 2 can drive the T-shaped rod to move along the axial direction of the lever 8, so that the T-shaped rod abuts against or moves away from the first brake switch 10 and the second brake switch 11. Specifically, the first brake switch 10 and the second brake switch 11 are existing brake switches for detecting pressure signals and transmitting the signals to the control center of the forklift. Figure 3As shown, compared with the implementation in which the lever 8 is a straight rod and only one brake switch is provided, the rod body of the lever 8 is provided between a pair of brake switches, and the T-shaped rod is provided at the detection end of the pair of brake switches, that is, one end of the reed is provided, and braking is performed according to the detection values ​​of the pair of brake switches, thereby effectively improving the detection accuracy and fault tolerance of the brake mechanism 9, and even if one of the brake switches fails and is damaged, the other brake switch can be used normally.

[0052] Secondly, the safety protection device also includes a fixed shaft 4; a through hole is provided on the fixed seat 1; a first waist-shaped hole is provided on the collision block 2; the fixed shaft 4 passes through the through hole and the first waist-shaped hole; the fixed shaft 4 can move along the axial direction of the lever 8 in the first waist-shaped hole. Specifically, the first waist-shaped hole is used to guide and limit the movement of the fixed shaft 4 in the axial direction of the lever 8, thereby improving the sliding stability of the collision block 2, making the force of the pair of elastic mechanisms 6 more uniform, and achieving better buffering effect. In addition, the fixed shaft 4 passes through the collision block 2 and the fixed seat 1 in sequence. When installed with the fork tip, the fork tip, the fixed seat 1 and the collision block 2 are arranged in sequence from high to low, and a three-layer installation method is adopted, thereby improving the installation convenience of the fork tip safety protection device. The fork tip safety protection device can be fixed to the bottom end of the fork tip by bolting or welding.

[0053] In addition, the collision block 2 is provided with a second waist-shaped hole and a third waist-shaped hole; in the horizontal direction, the second waist-shaped hole and the third waist-shaped hole are slidably connected to a pair of elastic mechanisms 6 in a one-to-one correspondence; a retaining spring 5 is provided in the through hole, and the retaining spring 5 is connected to the fixed shaft 4. The provision of the second waist-shaped hole and the third waist-shaped hole enables the collision block 2 to rotate around the axis of the fixed shaft 4, thereby improving the detection sensitivity of the fork tip safety protection device when colliding with an offset obstacle. The retaining spring 5 is sleeved on the fixed shaft 4, and the retaining spring 5 is used to axially limit the fixed shaft 4, which can effectively prevent the fixed shaft 4 from slipping out of the fixed seat 1.

[0054] See also Figure 4 In this working condition, the collision block 2 is subjected to a left eccentric load, and the compression amplitude of the elastic mechanism 6 on the left is greater than that of the elastic mechanism 6 on the right. Therefore, the pressure of the T-bar on the second brake switch 11 on the right is greater than that on the first brake switch 10 on the left. The control center of the forklift brakes or keeps the forklift running normally according to the pressure signal measured by the second brake switch 11. The same is true when the collision block 2 is subjected to a right eccentric load, which will not be elaborated. Therefore, by associating the braking threshold of the first brake switch 10 on the left with the right eccentric load, and associating the braking threshold of the second brake switch 11 on the right with the left eccentric load, the detection sensitivity of the fork tip safety protection device can be effectively improved, and timely braking can be performed according to the size of the external collision force, thereby better protecting the equipment and pallets.

[0055] Furthermore, an open slot is provided on the fixing seat 1; the lever 8 is slidably connected to the open slot in the horizontal direction. The open slot is provided on one end surface of the fixing seat 1 facing the T-shaped rod, so as to further limit the maximum swing angle of the collision block 2 and effectively protect the pair of elastic mechanisms 6 from exceeding the elastic limit and prolonging the service life.

[0056] Secondly, the first brake switch 10 and the second brake switch 11 are elastically provided with a reed at one end facing the T-bar; the T-bar can squeeze or move away from the reed. The reed can not only play a certain buffering role to protect the brake switch, but also improve the detection sensitivity of the brake switch. In this embodiment, under normal working conditions, the T-bar abuts against a pair of brake switches; under the equal pressure state and the bias state, the T-bar is separated from one or a pair of brake switches. As long as one brake switch is separated from the T-bar, the control center of the forklift brakes the forklift. Of course, the brake switch and the T-bar can also be braked in a tensile or compressive manner, and the corresponding force threshold can be set.

[0057] In addition, the elastic mechanism 6 includes a spring and a guide shaft 3; one end of the guide shaft 3 is connected to the collision block 2, and the other end is connected to the fixed seat 1; the spring is sleeved on the guide shaft 3. The spring is a compression spring, which can lift the collision block 2 to reset under normal conditions, and realize the automatic reset of the collision block 2 after being compressed, with a simple and practical structure. The guide shaft 3 enhances the transmission stability of the equipment and avoids the situation where the local force is too large and the equipment is damaged.

[0058] Furthermore, a stepped shaft hole is provided on the fixing seat 1; the spring is connected to the outer hole of the stepped shaft hole; the guide shaft 3 is inserted into the inner hole of the stepped shaft; a threaded hole is provided on the end of the guide shaft 3 facing the brake mechanism 9; a plurality of bolts 7 are provided on the fixing seat 1; and the threaded hole is threadedly connected with the bolt 7. The cross section of the stepped shaft hole is in the shape of a cross section of a bolt, the spring abuts between the collision block 2 and the outer hole of the stepped shaft hole, the guide shaft 3 extends into the inner hole of the stepped shaft, and then penetrates the fixing seat 1 through the bolt 7 and is connected to the threaded hole to fix the guide shaft 3. The setting of the stepped shaft hole enhances the radial limiting ability of the spring and the guide shaft 3, improves the structural strength of the elastic mechanism 6, thereby improving the accuracy of the collision force transmitted from the collision block 2 to the brake mechanism 9, improving the braking sensitivity, and better protecting the equipment.

[0059] It should be understood that the above description of the specific embodiments of the utility model is only for illustrating the technical route and features of the utility model, and its purpose is to enable those skilled in the art to understand the content of the utility model and implement it accordingly, but the utility model is not limited to the above specific implementation methods. All changes or modifications made within the scope of the claims of the utility model should be included in the protection scope of the utility model.

Claims

1. A fork tip safety protection device for a forklift type AGV, characterized in that: The safety protection device comprises a fixing seat (1), a collision block (2), a braking mechanism (9), a lever (8) and a pair of elastic mechanisms (6); One end of the fixing seat (1) is connected to the braking mechanism (9), and the other end is connected to the elastic mechanism (6); The other end of the elastic mechanism (6) is connected to the collision block (2); a pair of the elastic mechanisms (6) are arranged on both sides of the shifting rod (8) in a one-to-one correspondence; One end of the lever (8) is connected to the collision block (2), and the other end is connected to the braking mechanism (9); The collision block (2) can drive the lever (8) to move along the axial direction of the lever (8) so as to enable the braking mechanism (9) to brake or release the brake.

2. The fork tip safety protection device of a forklift type AGV according to claim 1, characterized in that: The brake mechanism (9) comprises a mounting plate, a first brake switch (10) and a second brake switch (11); The mounting plate is connected to the fixing seat (1); One end of the lever (8) facing the mounting plate is configured as a T-shaped rod; The first brake switch (10) and the second brake switch (11) are arranged on both sides of the T-shaped rod in a one-to-one correspondence; The collision block (2) can drive the T-shaped rod to move along the axial direction of the shifting rod (8), so that the T-shaped rod abuts against or moves away from the first brake switch (10) and the second brake switch (11).

3. The fork tip safety protection device of a forklift type AGV according to claim 2, characterized in that: The safety protection device also includes a fixed shaft (4); the fixed seat (1) is provided with a through hole; the collision block (2) is provided with a first waist-shaped hole; The fixed shaft (4) passes through the through hole and the first waist-shaped hole; the fixed shaft (4) can move in the first waist-shaped hole along the axial direction of the shifting rod (8).

4. The fork tip safety protection device of a forklift type AGV according to claim 3, characterized in that: The collision block (2) is also provided with a second waist-shaped hole and a third waist-shaped hole; Along the horizontal direction, the second waist-shaped hole and the third waist-shaped hole are slidably connected to a pair of the elastic mechanisms (6) in a one-to-one correspondence; A retaining spring (5) is arranged in the through hole, and the retaining spring (5) is connected to the fixed shaft (4).

5. The fork tip safety protection device of a forklift type AGV according to claim 4, characterized in that: The fixing seat (1) is provided with an open slot; Along the horizontal direction, the shifting rod (8) is slidably connected to the opening groove.

6. The fork tip safety protection device of a forklift type AGV according to claim 2, characterized in that: The first brake switch (10) and the second brake switch (11) are both elastically provided with a reed at one end facing the T-shaped rod; The T-bar can be pressed against or away from the reed.

7. The fork tip safety protection device of a forklift type AGV according to any one of claims 1 to 6, characterized in that: The elastic mechanism (6) comprises a spring and a guide shaft (3); One end of the guide shaft (3) is connected to the collision block (2), and the other end is connected to the fixing seat (1); The spring is sleeved on the guide shaft (3).

8. The fork tip safety protection device of a forklift type AGV according to claim 7, characterized in that: The fixing seat (1) is provided with a stepped shaft hole; The spring is connected to the outer hole of the stepped shaft hole; the guide shaft (3) penetrates into the inner hole of the stepped shaft; A threaded hole is provided on one end of the guide shaft (3) facing the brake mechanism (9); a plurality of bolts (7) are provided on the fixing seat (1); and the threaded hole is threadedly connected to the bolts (7).

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