Normally open fork tip collision sensor device, front fork arm, and forklift

Abstract

The present invention provides a normally open fork tip collision sensing device, a front fork arm, and a forklift, wherein the device comprises: a chassis, a striker tongue, an elastic member, a rotating shaft, a first sensor, and a second sensor, wherein the chassis is shaped like a lower jaw; the first sensor is disposed at a first position of the chassis; the striker tongue is U-shaped, with its first end rotatably connected to a second position of the chassis via a rotating shaft so as to be disposed in front of the first sensor; a limiting tongue extends from the first end of the striker tongue, and the elastic member is at least partially connected to the first end of the striker tongue; a blocking portion is provided at a third position of the chassis to separate the limiting tongue and the elastic member to form an elastic mechanism; the second sensor is connected to a fourth position of the chassis so that when the striker tongue rotates with the collision, its second end dynamically extends into / out of the sensing area of ​​the second sensor. This allows for a coordinated design of a non-contact sensor and a hard collision sensing structure within a compact space, thereby reducing the overall size.

Description

Technical Field

[0001] The present invention relates to a collision detection structure technology, in particular to a normally open fork tip collision sensor device, a front fork arm and a forklift. Background Art

[0002] Currently, automated forklifts typically install a detection device at the tip of the fork tines to prevent damage from collisions. However, existing fork tip collision detection systems in intelligent forklifts are typically designed for a single function, featuring either a non-contact sensor or a hard collision sensing mechanism. Incorporating both requires a coordinated design between the internal sensor and the collision mechanism, creating design challenges.

[0003] For example, the prior art has proposed "A Fork Teeth Collision Detection Device and Automatic Transport Forklift" (Chinese Patent Application No.: 202222831283.7), in which the device includes: a collision island, a connecting seat, an elastic telescopic mechanism, a side stopper, a first guide rail mechanism, and a trigger mechanism, wherein the collision island and the connecting seat are connected by an elastic telescopic mechanism, the first guide rail mechanism is laterally arranged on the collision island, the side stopper is connected to the slider of the first guide rail mechanism to be arranged on the side of the collision island, the trigger mechanism is arranged on the connecting seat, and its trigger end extends into the path of the side stopper moving along the first guide rail mechanism, and the side stopper is backed against the trigger end to form a trigger when it is squeezed by the back of the side stopper and retreats, thereby providing front and side collision detection for the fork teeth.

[0004] However, although this type of existing technology achieves a coordinated design between the internal non-contact sensor and the collision structure, the overall structure of the solution is still relatively large and not compact enough, which puts forward certain adaptation requirements for the installation space of the forklift's front fork arm. Summary of the Invention

[0005] To this end, the main purpose of the present invention is to provide a normally open fork tip collision sensing device, a front fork arm, and a forklift, so as to achieve a coordinated design of a non-contact sensor and a hard collision sensing structure in a compact space, thereby reducing the size.

[0006] In order to achieve the above-mentioned purpose, according to a first aspect of the present invention, there is provided a normally open fork tip collision sensing device, which comprises: a chassis, a striker tongue, an elastic member, a rotating shaft member, a first sensor, and a second sensor, wherein the chassis is in a jaw-like shape; the first sensor is arranged at a first position of the chassis; the striker tongue is in a U-like shape, and its first end is rotatably connected to the second position of the chassis via the rotating shaft member so as to be arranged in front of the first sensor; a limiting tongue extends from the first end of the striker tongue, and the elastic member is at least partially connected to the first end of the striker tongue; a blocking portion is provided at the third position of the chassis to diverge the limiting tongue and the elastic member to form an elastic mechanism; the second sensor is connected at a fourth position of the chassis so that when the striker tongue rotates with the collision, its second end dynamically extends into / out of the sensing area of ​​the second sensor.

[0007] Among them, a first limiting portion and a second limiting portion are respectively provided on the retraction displacement trajectory of the collision tongue at the upper position of the chassis and close to the front and side of the first sensor. A third limiting portion is provided at the fifth position on the chassis to limit the retraction displacement limit of the collision tongue and its limiting tongue.

[0008] The elastic member is in sheet shape, one side of the blocking portion of the chassis is sloped, and the head is in an arc-shaped transition shape, and the elastic member is against the sloped side of the blocking portion.

[0009] In a possible preferred embodiment, a bearing member is embedded on one side of the sloped portion of the chassis blocking portion to abut against the elastic member to form a guide.

[0010] In a possible preferred embodiment, the normally open fork tip collision sensing device further includes: a sleeve, a shaft pin, and a locking bolt, wherein a connecting hole is provided at the bottom of the rotating shaft, the sleeve is sleeved on the outside of the rotating shaft to carry the collision tongue, the locking bolt passes through the bottom of the chassis and is matched with the rotating shaft through the connecting hole, and the shaft pin is matched with the screw hole on the side of the chassis to support the rotating shaft from the side.

[0011] In a possible preferred embodiment, the normally open fork tip collision sensing device further includes: a horizontal adjustment mechanism, wherein a first window is provided at the first position of the chassis, and a stepped connecting portion is provided on the inner side of the first window. The horizontal adjustment mechanism includes: an adjustment plate, an adjustment bolt, and a washer, wherein the adjustment plate is matched with the connecting portion via the adjustment bolt to cover the first window, the washer is sleeved on the adjustment bolt and is located between the adjustment plate and the connecting portion, and the first sensor is connected to the adjustment plate so that its sensing surface is located above the collision tongue.

[0012] In a possible preferred embodiment, the first sensor includes at least one of a single-line laser sensor and a planar laser sensor, and the second sensor is a proximity switch.

[0013] In a possible preferred embodiment, the normally open fork tip collision sensing device further includes: an adjusting bracket, the adjusting bracket is L-shaped, and a waist hole is provided at its first end, the adjusting bracket is connected to the chassis via bolts and the waist hole to adjust the connection position of the adjusting bracket at the fourth position of the chassis, and the second sensor is connected to the second end of the adjusting bracket so that its sensing area is toward the retreat path of the collision tongue.

[0014] In order to achieve the above-mentioned purpose, according to the second aspect of the present invention, a front fork arm is further provided, which includes: a fork rod, a collision sensing device, wherein the collision sensing device is any of the above-mentioned normally open fork tip collision sensing devices, wherein the front end of the fork rod is in the shape of an upper jaw, and the normally open fork tip collision sensing device is matched with the front end of the fork rod through the chassis to form a slightly open mouth shape to define a sensing window and allow the collision tongue to extend / contract therein.

[0015] In order to achieve the above object, according to a third aspect of the present invention, there is further provided a forklift, which comprises: the above-mentioned front fork arm and a vehicle body, wherein the front fork arm is arranged at the front side of the vehicle body.

[0016] The normally open fork tip collision sensor device, front fork arm, and forklift provided by the present invention adopt an ingenious compact design scheme, and simultaneously realize the coordinated design of the non-contact sensor and the hard collision sensing structure in a very small space, thereby greatly reducing the size of the device, leaving a large amount of design and adjustment space for subsequent installation on the front fork arm of the forklift. In addition, due to the small size of the device, it can be generally applied to the modification of the front fork arms of various existing forklifts to form a product function upgrade, thereby having a high implementation and commercial application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0018] Figures 1 to 2 Schematic diagram of the overall structure of the normally open fork tip collision sensor device of the present invention;

[0019] Figure 3 This is a schematic diagram of the assembly structure of the normally open fork tip collision sensor device of the present invention;

[0020] Figure 4 This is an exemplary structural diagram of a chassis blocking portion provided with a bearing member in a normally open fork tip collision sensing device of the present invention;

[0021] Figure 5 It is a partial perspective structural diagram of the normally open fork tip collision sensor device of the present invention;

[0022] Figure 6 Schematic diagram of the bottom structure of the normally open fork tip collision sensor device of the present invention;

[0023] Figure 7 Schematic diagram of the structure of the first window of the chassis and its connecting portion in the normally open fork tip collision sensor device of the present invention;

[0024] Figure 8 This is a schematic side structural diagram of the normally open fork tip collision sensor device of the present invention;

[0025] Figures 9 and 10 It is a schematic structural diagram of the front fork arm of the present invention.

[0026] Description of Reference Numerals

[0027] Chassis 1, collision tongue 2, elastic member 3, rotating shaft member 4, first sensor 5, second sensor 6, horizontal adjustment mechanism 7, adjustment bracket 8, collision sensing device 9, fork rod 10, blocking part 11, first limiting part 12, second limiting part 13, third limiting part 14, first window 15, connecting part 16, guide column 17, limiting tongue 21, shaft sleeve 41, shaft pin member 42, locking bolt 43, adjusting plate 71, adjusting bolt 72, washer 73, sensing window 81, bearing member 111. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0031] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, or are the orientation or positional relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance. The terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0032] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0033] In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "setting", "layout", "installation", "connection", and "connection" should be understood in a broad sense. For example, it 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 it can be indirectly connected through an intermediate medium, or it can be a connection between the two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances and in combination with the existing technology. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other unless there is a conflict. And one or more of the components in the diagram may be necessary or non-essential, and the relative positional relationship between the components in the above diagram can be adjusted according to actual needs.

[0034] In order to achieve the coordinated design of non-contact sensors and hard collision sensing structures in a compact space, thereby reducing the size.

[0035] like Figures 1 to 8As shown, the present invention provides a normally open fork tip collision sensing device, which includes: a chassis 1, a striker tongue 2, an elastic member 3, a rotating shaft member 4, a first sensor 5, and a second sensor 6, wherein the chassis 1 is in a jaw-like shape; the first sensor 5 is used to implement non-contact sensing detection, for example, including: at least one of a single-line laser sensor and a planar laser sensor, which is arranged at a first position of the chassis 1; wherein the striker tongue 2 is in a U-like shape, and its first end is rotatably connected to the second position of the chassis 1 via the rotating shaft member 4, so as to be arranged in front of the first sensor 5; A limiting tongue 21 extends from the first end of the striker tongue 2, and the elastic member 3 is at least partially connected to the first end of the striker tongue 2; wherein the third position of the chassis 1 is provided with a blocking portion 11, which is used to separate the limiting tongue 21 and the elastic member 3, so that elasticity is obtained through the deformation recovery force of the elastic member 3, so as to drive the striker tongue 2 to rotate through the rotating shaft 4 to form an elastic mechanism; wherein the second sensor 6 is preferably a proximity switch, which is connected at the fourth position of the chassis 1, so that when the striker tongue 2 rotates with the impact, the second end of the striker tongue 2 dynamically extends into / out of the sensing area of ​​the second sensor 6.

[0036] Specifically, this example cleverly designs the chassis 1 to be like a biological mandible, thereby defining an inner cavity area to set up a hard collision sensing structure and a non-contact sensor. However, since the inner cavity space is very compact, it is impossible to adopt the structure of a traditional linear elastic retraction mechanism. Therefore, the present invention intends to miniaturize the hard collision sensing structure, so that Figures 1 to 2 As shown, a design scheme of a rotational elastic retraction mechanism is proposed, so that one end of the collision tongue 2 is rotationally connected to one side of the chassis 1, and at the same time, the elastic member 3 is cleverly matched with one side of the rotational connection end of the collision tongue 2, and the elastic member 3 is deviated by the blocking portion 11 set at the third position of the chassis 1 to obtain the deformation recovery elastic force.

[0037] Therefore, when the impact tongue 2 encounters an impact, it will rotate and retreat around the rotating shaft 4 as the center, and after the impact force disappears, it will rotate and retreat to its original position due to elastic force, thereby forming a rotary elastic retraction mechanism to replace the traditional linear retraction mechanism, thereby greatly saving the structural space and retraction stroke space required for the retraction mechanism.

[0038] At the same time, it is worth noting that since the collision tongue 2 in this example is cleverly designed to be U-shaped, when it rotates and retracts, it occupies very little space in the inner cavity of the chassis 1, only the outer portion of the front side of the chassis 1. Therefore, corresponding to the center and rear areas of the chassis 1, that is, the first position and the fourth position of the chassis 1, there will be a large space to allow the first sensor 5 and the second sensor 6 to be set. At this time, considering that the second end of the collision tongue 2 will also form a displacement during the rotation and retraction process, for this reason, in this example, the sensing area of ​​the second sensor 6 is cleverly directed toward the retraction displacement trajectory of the second end of the collision tongue 2, thereby forming a roughly annular hard collision sensing structure between the second sensor 6 and the collision tongue 2 to surround the non-contact first sensor 5, thereby reasonably improving space utilization. Finally, by adjusting the relative height of the collision tongue 2 and the first sensor 5, it is possible to avoid blocking the sensing surface of the first sensor 5. In this way, a compact design structure can be formed under the premise of coordinated design of the non-contact sensor and the hard collision sensing structure, thereby significantly reducing the size of the device.

[0039] Furthermore, considering that the tongue 2 is often impacted by external obstacles, in order to prevent it from being violently impacted and causing an over-limit, thereby damaging the first sensor 5, the tongue 2 is provided with a plurality of protective rings. Figures 1 to 3 As shown, a first limiting portion 12 and a second limiting portion 13 are respectively provided on the retraction displacement trajectory of the striker tongue 2 at the upper position of the chassis 1 and near the front and side of the first sensor 5. A third limiting portion 14 is provided at the fifth position on the chassis 1 to limit the retraction movement limit of the striker tongue 2 and its limiting tongue 21, thereby forming protection.

[0040] On the other hand, Figure 2 As shown, in the rotational elastic retraction mechanism of this example, the elastic member 3 and the limiting tongue 21 will move with the rotational retraction of the impact tongue 2 and form friction with the blocking portion 11 of the chassis 1. Therefore, in order to better guide the movement of the elastic member 3 and the limiting tongue 21 and prevent the elastic member 3 from being bent or damaged, or the blocking portion 11 and the limiting tongue 21 from being pressed against each other, in a preferred example, the elastic member 3 is arranged in a sheet shape, and one side of the blocking portion 11 of the chassis 1 is arranged in a slope shape. The slope will control the elastic member 3 from being bent, and at the same time, the other side of the blocking portion 11 is in a straight wall shape, and the head of the blocking portion 11 is arranged in an arc-shaped transition shape. The elastic member 3 rests on the sloped side of the blocking portion 11, and the limiting tongue 21 is abutted against the straight wall surface of the blocking portion 11, so that when the impact tongue 2 rotates and retracts, it rotates against the arc-shaped transition head of the blocking portion 11, thereby improving the movement reliability of the rotational elastic retraction mechanism.

[0041] Further, such as Figure 4As shown, considering that the elastic member 3 moves against the sloped side of the blocking portion 11 for a long time and is prone to wear, in a preferred example, a bearing member 111 is embedded on the sloped side of the blocking portion 11 of the chassis 1 to resist the elastic member 3 to form a guide, thereby reducing friction and further improving the movement reliability and service life of the rotary elastic retraction mechanism.

[0042] Further, such as Figure 3 、 Figure 5 As shown, since the impact tongue 2 needs to withstand collisions for a long time, the traditional rotating shaft 4 may become loose during long-term use, which may cause the entire mechanism to be crashed or deformed due to the offset of the impact tongue 2. Therefore, in order to further improve the reliability of the rotational connection between the impact tongue 2 and the chassis 1, in a preferred example, the normally open fork tip collision sensor device also includes: a sleeve 41, a shaft pin 42, and a locking bolt 43, wherein the bottom of the rotating shaft 4 is provided with a connecting hole, the sleeve 41 is sleeved on the outside of the rotating shaft 4 to carry the impact tongue 2, the locking bolt 43 passes through the bottom of the chassis 1, and is matched with the rotating shaft 4 through the connecting hole to form a locking, and the shaft pin 42 is matched with the screw hole on the side of the chassis 1 to support the rotating shaft 4 from the side, thereby strengthening the fastening of the rotating shaft 4 in both axial and radial directions to prevent the occurrence of similar problems mentioned above.

[0043] Further, such as Figure 3 、 Figure 6 、 Figure 7 As shown, considering that the detection direction of non-contact sensors such as single-line laser sensors and planar laser sensors sometimes needs to be adjusted horizontally during installation and use, in order to realize the horizontal adjustable function and facilitate manual debugging before / after installation. In this example, the normally open fork tip collision sensor device also includes: a horizontal adjustment mechanism 7, wherein a first window 15 is provided at the first position of the chassis 1, and a step-shaped connecting portion 16 is provided on the inner side of the first window 15. The horizontal adjustment mechanism 7 includes: an adjustment plate 71, an adjustment bolt 72, and a washer 73, wherein the adjustment plate 71 is matched with the connecting portion 16 through the adjustment bolt 72 to cover the first window 15, and the washer 73 is sleeved on the adjustment bolt 72 and is located between the adjustment plate 71 and the connecting portion 16. The first sensor 5 is connected to the adjustment plate 71 so that its sensing surface is located above the collision tongue 2.

[0044] When the horizontal adjustment mechanism 7 is adjusted, the adjustment bolt 72 is screwed to cause the adjustment plate 71 to squeeze the washer 73 to adjust the horizontal position of the adjustment plate 71 relative to the first window 15. Figure 6As shown, four adjusting bolts 72 are provided to support the adjustment of the left and right roll and pitch angles, thereby driving the first sensor 5 connected thereto to make corresponding horizontal adjustments. In addition, it is worth mentioning that due to the structure of the horizontal adjustment mechanism 7, the adjusting bolts 72 are supported facing the bottom of the chassis 1. Therefore, whether it is installed on the front fork arm of the forklift or adjusted separately from the body, it is very suitable for manual operation.

[0045] Further, such as Figure 3 As shown, in order to realize the adjustable function of the sensing position of the second sensor 6, in this preferred example, the normally open fork tip collision sensing device further includes: an adjusting bracket 8, the adjusting bracket 8 is L-shaped, and a waist hole is provided at its first end. The adjusting bracket 8 is connected to the chassis 1 through bolts and the waist hole to adjust the connection position of the adjusting bracket 8 at the fourth position of the chassis 1. The second sensor 6 is connected to the second end of the adjusting bracket 8 so that its sensing area is oriented toward the retreat path of the collision tongue 2.

[0046] On the other hand, corresponding to the above-mentioned example of the normally open fork tip collision sensor device, as Figures 9 and 10 As shown, the present invention also provides a front fork arm, which includes: a fork rod 10, a collision sensing device 9, wherein the collision sensing device 9 is any of the above-mentioned normally open fork tip collision sensing devices, wherein the front end of the fork rod 10 is in the shape of an upper jaw, and the normally open fork tip collision sensing device is bolted to the front end of the fork rod 10 through the guide column 17 and the second limiting portion 13 of the chassis 1, so that the upper jaw structure of the front end of the fork rod 10 is merged with the lower jaw structure of the chassis 1 to form a slightly open mouth shape, so as to define a sensing window 81, so as to allow the collision tongue 2 to extend / contract in the sensing window 81, and at the same time, the opening range of the sensing window 81 corresponds to the sensing range of the first sensor 5.

[0047] Furthermore, the slightly open mouth formed by the chassis 1 and the front end of the fork rod 10 can actually provide a blocking and protective effect. When the striker tongue 2 is impacted and retracted into the chassis 1, the front end of the fork rod 10 and the front end of the chassis 1 will block the impacting object, thereby protecting the entire hard collision sensing structure. Thus, through the front fork arm solution provided in this example, it can be seen that only a small space is required at the front end of the fork rod 10 to accommodate the collision sensing device 9.

[0048] On the other hand, corresponding to the normally open fork tip collision sensor device of the above example, the present invention also provides a forklift, which includes: a front fork arm and a vehicle body, wherein the front fork arm is arranged on the front side of the vehicle body, wherein the front fork arm is the front fork arm structure of the above example.

[0049] In summary, the normally open fork tip collision sensor device, front fork arm, and forklift provided by the present invention adopt an ingenious compact design scheme, which realizes the coordinated design of non-contact sensor and hard collision sensing structure in a very small space, thereby greatly reducing the size of the device, leaving a large design and adjustment space for subsequent installation on the front fork arm of the forklift, and because the device is small in size, it can be generally applied to the modification of the existing front fork arms of various forklifts to form product function upgrades, thereby having high implementation and commercial application value.

[0050] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made based on the contents of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can better understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0051] In addition, various implementations of the embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the embodiments of the present invention, they should also be regarded as the contents disclosed in the embodiments of the present invention.

Claims

1. A normally open fork tip collision sensor device, characterized in that include: A chassis, a striker tongue, an elastic member, a rotating shaft, a first sensor, and a second sensor, wherein the chassis is in a jaw-like shape; The first sensor is arranged at the first position of the chassis; the collision tongue is U-shaped, and its first end is rotatably connected to the second position of the chassis via a rotating shaft so as to be arranged in front of the first sensor; the first end of the collision tongue extends into a limiting tongue, and the elastic member is sheet-shaped and at least partially connected to the first end of the collision tongue; a blocking portion is provided at the third position of the chassis to separate the limiting tongue and the elastic member to form an elastic mechanism, one side of the blocking portion is sloped and the head is in an arc-shaped transition shape, and the elastic member rests on the sloped side of the blocking portion; the second sensor is connected at the fourth position of the chassis so that when the collision tongue rotates with the collision, its second end dynamically extends into / out of the sensing area of ​​the second sensor, wherein a first limiting portion and a second limiting portion are respectively provided on the retraction displacement trajectory of the collision tongue at the upper position of the chassis and close to the front and side of the first sensor, and a third limiting portion is provided at the fifth position on the chassis to limit the retraction displacement limit of the collision tongue and its limiting tongue.

2. The normally open fork tip collision sensor device according to claim 1, characterized in that: A bearing component is embedded on one side of the sloped portion of the chassis blocking portion to abut against the elastic component to form a guide.

3. The normally open fork tip collision sensor device according to claim 1, characterized in that: Also includes: A shaft sleeve, a shaft pin, and a locking bolt, wherein a connecting hole is provided at the bottom of the rotating shaft, the shaft sleeve is sleeved on the outside of the rotating shaft to carry the impact tongue, the locking bolt passes through the bottom of the chassis and is matched with the rotating shaft through the connecting hole, and the shaft pin is matched with the screw hole on the side of the chassis to support the rotating shaft from the side.

4. The normally open fork tip collision sensor device according to claim 1, characterized in that: Also includes: A horizontal adjustment mechanism, wherein a first window is provided at the first position of the chassis, and a stepped connecting portion is provided on the inner side of the first window. The horizontal adjustment mechanism includes: an adjustment plate, an adjustment bolt, and a washer, wherein the adjustment plate is matched with the connecting portion via the adjustment bolt to cover the first window, the washer is sleeved on the adjustment bolt and is located between the adjustment plate and the connecting portion, and the first sensor is connected to the adjustment plate so that its sensing surface is located above the collision tongue.

5. The normally open fork tip collision sensor device according to claim 1, characterized in that: The first sensor includes at least one of a single-line laser sensor and a planar laser sensor, and the second sensor is a proximity switch.

6. The normally open fork tip collision sensor device according to claim 1, characterized in that: Also includes: The adjusting bracket is L-shaped and has a waist hole at its first end. The adjusting bracket is connected to the chassis via bolts and the waist hole to adjust the connection position of the adjusting bracket at the fourth position of the chassis. The second sensor is connected to the second end of the adjusting bracket so that its sensing area is facing the retreat path of the collision tongue.

7. A front fork arm comprising: Fork lever, A collision sensing device, characterized in that the collision sensing device is a normally open fork tip collision sensing device as described in any one of claims 1 to 6, wherein the front end of the fork rod is in the shape of an upper jaw, and the normally open fork tip collision sensing device is matched with the front end of the fork rod through the chassis to form a slightly open mouth shape to define a sensing window and allow the collision tongue to extend / retract therein.

8. A forklift, characterized in that include: The front fork arm and vehicle body according to claim 7, wherein the front fork arm is arranged on the front side of the vehicle body.

Images