WO2024011585A1

WO2024011585A1 - Manual forklift

Info

Publication number: WO2024011585A1
Application number: PCT/CN2022/105965
Authority: WO
Inventors: 孙宝锋
Original assignee: 孙宝锋
Priority date: 2022-07-15
Filing date: 2022-07-15
Publication date: 2024-01-18

Abstract

A manual forklift, comprising: a frame defining a vertical center line that runs through, in a vertical direction, the center of the frame in a transverse direction; two lead screws relatively separated from each other and rotatably disposed on the frame, the two lead screws being arranged in the transverse direction and located on two opposite sides of the vertical center line, respectively; two sliding blocks in a threaded connection with the two lead screws, respectively, the rotation of the lead screws driving the sliding blocks to move in the transverse direction; and two forks arranged in a longitudinal direction and located on the two opposite sides of the vertical center line, respectively, the two forks being fixedly connected to the two sliding blocks, respectively. The distance between the two forks of the manual forklift of the present application can be continuously adjusted, so that the manual forklift is convenient to use.

Description

Manual forklift

Technical field

This application relates to the technical field of forks, in particular to a manual forklift.

Background technique

Manual forklifts are mainly used for loading, unloading, stacking and short-distance transportation of palletized goods. They are indispensable handling equipment in pallet transportation and container transportation.

A manual forklift has two forks, which are used to carry the pallet together to transport the goods on the pallet to a designated location. However, the distance between the two forks of the existing manual forklift cannot be continuously adjusted, but can only be adjusted to a limited number of sizes. Therefore, it cannot adapt to a variety of pallets of different sizes, causing inconvenience.

Contents of the invention

The purpose of this application is to provide a manual forklift to solve the problem that the distance between the two forks of the existing manual forklift cannot be continuously adjusted.

An embodiment of the present application provides a manual forklift, which defines mutually perpendicular transverse directions, longitudinal directions and vertical directions. The manual forklift includes: a frame, defining a position along the vertical direction passing through the frame. The vertical centerline of the center in the transverse direction; two lead screws, relatively independently and rotatably provided on the frame, the two lead screws are respectively arranged along the transverse direction and are respectively located in the vertical direction Opposite sides of the centerline; two slide blocks, respectively threadedly connected with the two screws, and the rotation of the screw drives the slide blocks to move along the transverse direction; two cargo forks, respectively, along the The two cargo forks are arranged in the longitudinal direction and are respectively located on opposite sides of the vertical centerline. The two cargo forks are respectively fixedly connected to the two slide blocks; wherein, the rotation of any of the screws causes the slider threadedly connected with it to rotate. The block moves along the transverse direction, and the movement of the slide block drives the fork connected thereto to move in a direction closer to or away from the vertical centerline to continuously adjust the distance between the two forks. spacing.

The advantages of the manual forklift according to the embodiment of the present application include:

1. The embodiment of this application achieves continuous stepless adjustment of the distance between the two forks by arranging threaded screws and sliders, so that it can adapt to a variety of pallets of different sizes and is easy to use;

2. The embodiment of the present application facilitates independent adjustment of the positions of the two forks by setting two independent screws. Compared with the solution that can only adjust the positions of the two forks at the same time, it is more flexible and convenient to use.

Description of drawings

The drawings described here are used to provide a further understanding of the present application, constitute a part of the present application, and do not constitute a limitation of the present application. In the attached picture:

Figure 1 is a front view of a manual forklift according to an embodiment of the present application when the forks are in a lower position;

Figure 2 is a front view of a manual forklift according to an embodiment of the present application when the forks are in a higher position;

Figure 3 is a left side view of a manual forklift according to an embodiment of the present application;

Figure 4 is a top view of a manual forklift according to an embodiment of the present application when the distance between two forks is small;

Figure 5 is a top view of a manual forklift according to an embodiment of the present application when the distance between two forks is large;

Figure 6 is a bottom view of a manual forklift according to an embodiment of the present application;

Figure 7 is a perspective view of a manual forklift according to an embodiment of the present application;

Figure 8 is a schematic diagram of the accommodation space of a manual forklift according to an embodiment of the present application;

Figure 9 is an exploded schematic diagram of the lifting wheel assembly and the drawbar of the manual forklift according to an embodiment of the present application;

Figure 10 is a schematic structural diagram of the swing arm of a manual forklift according to an embodiment of the present application.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings. Here, the illustrative embodiments and descriptions of the present application are used to explain the present application, but are not used to limit the present application.

As shown in Figures 1 and 7, an embodiment of the present application provides a manual forklift 100. The manual forklift 100 defines a transverse direction W, a longitudinal direction S and a vertical direction H that are perpendicular to each other, where the transverse direction W can be understood as a forklift The width direction, the longitudinal direction S can be understood as the length direction of the forklift, and the vertical direction H can be understood as the height direction of the forklift.

As shown in Figure 1, the manual forklift 100 in the embodiment of the present application includes a support wheel 101 (also called a front wheel), two sets of lifting wheels 102 (also called a rear wheel), a push rod 103, two forks 104 and a truck. Frame 105, the support wheel 101 is located in front of the vehicle frame 105, and the two sets of lifting wheels 102 are respectively located under the rear ends of the two cargo forks 104. The support wheels 101 and the lifting wheels 102 jointly support the vehicle frame 105 and the two cargo forks 104. . The push rod 103 is disposed in front of the frame 105 and above the support wheel 101. The upper end of the push rod 103 is provided with a handle 106 to facilitate the operator to push and pull the push rod 103.

The frame 105 supports the fork 104, has a center in the transverse direction, and defines a vertical centerline passing through the center of the frame 105 in the vertical direction. The two forks 104 are respectively arranged along the longitudinal direction and located at opposite sides of the vertical centerline.

As shown in FIGS. 6 and 8 , the manual forklift 100 in the embodiment of the present application also includes two screws 107 and two slide blocks 108 . The two screws 107 are relatively independent and rotatably provided on the frame 105. The two screws 107 are respectively arranged in the transverse direction and located on opposite sides of the vertical center line. In other words, the two screws 107 The axial direction is parallel to said transverse direction. Under the restriction of the vehicle frame 105, the two lead screws 107 can only rotate around their own central axes, but cannot move along their own axial direction. The two slide blocks 108 are threadedly connected to the two lead screws 107 respectively, and the rotation of the lead screws 107 causes the slide blocks 108 to move in the transverse direction. The two cargo forks 104 are respectively fixedly connected to the two slide blocks 108 so as to be able to move in the transverse direction along with the slide blocks 108 . Among them, the rotation of any one of the screws 107 causes the slider 108 threadedly connected to it to move in the lateral direction. The movement of the slider 108 drives the cargo fork 104 connected to it to move in a direction closer to or away from the vertical centerline to continuously adjust the two sides. The distance between the forks 104 (as shown in Figures 4 and 5). For example, by rotating the screw 107 clockwise, the slider 108 connected to it moves in a direction away from the vertical centerline, thereby increasing the distance between the two forks 104; by rotating the screw 107 counterclockwise, , causing the slider 108 connected thereto to move in a direction close to the vertical centerline, thereby reducing the distance between the two forks 104 .

The embodiment of the present application realizes the continuous stepless adjustment of the distance between the two forks 104 by arranging the threaded screw 107 and the slider 108, so that it can adapt to a variety of pallets of different sizes and is very convenient to use.

The embodiment of the present application provides two independent screws 107 to facilitate independent adjustment of the positions of the two forks 104. Compared with the solution that can only adjust the positions of the two forks 104 at the same time, it is more flexible and convenient to use. For example, when using a forklift, when one of the forks 104 is restricted by an obstacle and cannot move, you can only adjust the position of the other fork 104, thereby adjusting the distance between the two forks 104. Purpose. However, for the solution that can only adjust two forks 104 at the same time, when the above situation is encountered, one fork 104 restricted by the obstacle will hinder the movement of the other fork 104, resulting in the movement of the two forks 104. The position cannot be adjusted and is inconvenient to use.

In some embodiments, the spacing between the two forks 104 is anywhere from 16 inches to 27 inches, such as 18 inches, 20 inches, 23 inches, or 25 inches. Of course, the adjustable spacing range between the two forks 104 can also be set to other numerical ranges according to actual needs, such as setting the minimum spacing to less than 16 inches, and/or setting the maximum spacing to greater than 27 inches.

As shown in Figure 8, in some embodiments, the manual forklift 100 also includes a first guide rod 109. The first guide rod 109 is fixed on the frame 105 and is disposed in the transverse direction. The first guide rod 109 passes through two sliders. The block 108 is used to guide the two slide blocks 108 to move in the transverse direction, and to limit the rotation of the slide blocks 108 with the lead screw 107 .

The number of first guide rods 109 may be two, and the two first guide rods 109 guide two slide blocks 108 respectively. Optionally, the number of the first guide rod 109 may also be one. The one first guide rod 109 guides the two slide blocks 108 at the same time. The length of the first guide rod 109 is not less than the longest sliding length of the two slide blocks 108. sum of distances.

As shown in Figures 6 and 8, in some embodiments, the manual forklift 100 further includes two drawbars 110 (shown in Figure 6). The two drawbars 110 are respectively disposed on the two forks 104 in the longitudinal direction. bottom, and are respectively connected to the lifting wheel assembly provided below the cargo fork 104. The lifting wheel assembly includes the aforementioned lifting wheel 102. In order to enable the drawbar 110 to move synchronously with the fork 104 in the transverse direction, two connecting sleeves 111 respectively connected to the two drawbars 110 and a second guide for guiding the connecting sleeves 111 to slide in the transverse direction are also provided. Rod 112 (shown in Figure 8).

Specifically, as shown in FIG. 8 , the second guide rod 112 is fixed on the vehicle frame 105 and is arranged in the transverse direction. The two connecting sleeves 111 are slidably sleeved outside the second guide rod 112 and are respectively connected with the two sliding sleeves. The position of the block 108 corresponds to that at least part of each connecting sleeve 111 extends into the corresponding sliding block 108 . When the slider 108 moves in the transverse direction, the connecting sleeve 111 can move synchronously with the slider 108 . In other words, the slider 108 can push the connecting sleeve 111 to slide synchronously along the second guide rod 112 . One end of the two drawbars 110 is rotatably connected to the two connecting sleeves 111 respectively, and the other end of the two drawbars 110 is rotatably connected to the lifting wheel assembly, so the drawbar 110 can follow the connecting sleeves 111, the slider 108 and the cargo fork. 104 moves synchronously in the transverse direction, so that the fork 104 and its linked components move more smoothly.

The number of the second guide rods 112 may be two, and the two second guide rods 112 guide the two connecting sleeves 111 respectively. Optionally, the number of the second guide rod 112 may also be one. The one second guide rod 112 guides the two connecting sleeves 111 at the same time. The length of the second guide rod 112 is not less than the longest sliding distance of the two connecting sleeves 111. sum of distances.

In some embodiments, as shown in FIG. 8 , the manual forklift 100 further includes a support base 113 , a hydraulic pump 114 , a swing arm 115 and at least one third guide rod 116 . The support wheel 101 is rotatably disposed below the support base 113 , and the push rod 103 is swingably disposed above the support base 113 .

Referring to Figures 1 and 8, the hydraulic pump 114 is fixed above the support base 113. The hydraulic pump 114 has a hydraulic rod 117 arranged in the vertical direction. The hydraulic rod 117 is connected to the frame 105. The hydraulic rod 117 moves upward in the vertical direction. , the drive frame 105 and the two forks 104 are raised, so that the forks 104 can lift the pallet. During specific operation, the hand-held handle 106 repeatedly presses the push rod 103, and the push rod 103 drives the hydraulic rod 117 to move upward, thereby raising the two cargo forks 104. The interaction principle between the hydraulic rod 117 and the push rod 103 in this application is the same as that of the manual forklift in the prior art, and the operating method of the push rod 103 is also the same as that of the manual forklift in the prior art, so no details are given.

Referring to Figures 1, 8 and 10, one end 118 of the swing arm 115 is rotatably connected to the support base 113, and the other end 119 of the swing arm 115 is rotatably connected to the second guide rod 112. When the frame 105 is raised, the second guide rod 112 is rotated. The rod 112 moves upward along the vertical direction with the frame 105. Correspondingly, the other end 119 of the swing arm 115 also rises, and the one end 118 of the swing arm 115 is limited by the support base 113 and has a constant height, so it is equivalent to The swing arm 115 swings downward around the second guide rod 112 .

Referring to Figures 1, 8 and 10, the third guide rod 116 is fixed on the other end 119 of the swing arm 115. The third guide rod 116 is arranged in the transverse direction and passes through the two connecting sleeves 111. The two connecting sleeves 111 are connected to the third connecting sleeve 111. Three guide rods 116 are slidably fitted. The function of the third guide rod 116 is to, on the one hand, guide the connecting sleeve 111 to slide smoothly in the transverse direction together with the second guide rod 112, and on the other hand, transmit the swing motion of the swing arm 115 to the traction rod 110 through the connecting sleeve 111, so that the traction rod 110 can be pulled. Rod 110 drives the lifting wheel assembly to rotate. Specifically, when the hydraulic pump 114 drives the vehicle frame 105 and the two forks 104 to rise, the connecting sleeve 111 swings downward around the second guide rod 112 along with the swing arm 115, and the downward swing of the connecting sleeve 111 drives the drawbar 110 The lifting wheel assembly is pushed to swing downward, so that the lifting wheel assembly can support the raised cargo fork 104 (as shown in Figure 2).

Figure 9 shows the structure of the lift wheel assembly. As shown in Figure 9, the lifting wheel assembly includes a swing rod 120 and a lifting wheel 102. One end 121 of the swing rod 120 is rotationally connected to the other end of the drawbar 110, and the other end 122 of the swing rod 120 is rotationally connected to the lifting wheel 102; the swing rod A part between the two ends of the swing rod 120 is rotationally connected with the fork 104 to form a pivot part 123. The pivot part 123 is close to one end 121 of the swing rod 120 and away from the other end 122 of the swing rod 120; one end 121 of the swing rod 120 is located at The front side of the pivot portion 123 (as shown in Figure 1). Therefore, when the connecting sleeve 111 swings downward around the second guide rod 112, the drawbar 110 is pushed by the connecting sleeve 111 to move backward, thereby pushing the one end 121 of the swing rod 120 to swing backward and upward around the pivot portion 123. , correspondingly, the other end 122 of the swing rod 120 swings forward and downward around the pivot portion 123, so that the lifting wheel 102 of the other end 122 of the swing rod 120 descends (as shown in FIG. 2) to support the lifting. Fork 104.

As shown in FIGS. 1 and 7 , in some embodiments, the vehicle frame 105 includes a frame 124 , a cover 125 and a partition 126 . The frame 124 is provided with two chutes 127 corresponding to the two cargo forks 104 respectively. The two chutes 127 respectively extend in the transverse direction. The two cargo forks 104 are respectively slidingly connected to the two chutes 127. The chutes 127 are opposite to the cargo. The guidance and support of the fork 104 makes the movement of the fork 104 in the transverse direction smoother. For example, the sliding connection method between the fork 104 and the chute 127 is that a sliding plate 128 is provided on the side of the chute 127 facing away from the fork 104. The sliding plate 128 is connected to the fork 104 through bolts 129 passing through the chute 127. The bolts 129 can slide along the chute 127, thereby realizing the sliding connection between the fork 104 and the chute 127.

The cover plate 125 is fixed above the frame 124, and a receiving space 130 is formed between the cover plate 125 and the frame 124 (as shown in Figure 3). Two screws 107, two slide blocks 108, two connecting sleeves 111, and a first guide The rod 109, the second guide rod 112 and the third guide rod 116 are all arranged in the accommodation space 130 to make the appearance of the forklift cleaner. For example, the shape of the cover 125 is an inverted V shape or an isosceles trapezoid.

As shown in Figure 8, the partition 126 is arranged along the vertical centerline in the accommodation space 130. The partition 126 is fixedly connected to the frame 124 and the cover 125 respectively. The partition 126 is used to support the two lead screws 107, the first Guide rod 109 and second guide rod 112 . Specifically, one end of the two screws 107 is connected to the side wall of the cover plate 125, and the other end is connected to the partition plate 126. The first guide rod 109 and the second guide rod 112 pass through the partition plate 126 or are connected to the partition plate 126. The partition 126 may be a vertical plate or an H-shaped plate frame formed by connecting multiple plates.

As shown in FIG. 8 , in some embodiments, each slider 108 has two front pawls 131 and at least one rear pawl 132 . The two front claws 131 are spaced apart in the transverse direction. The two front claws 131 are respectively located on opposite sides of the corresponding connecting sleeve 111 and slide with the second guide rod 112. The advantage of this arrangement is that on the one hand, the two front claws 131 can slide The block 108 can push the connecting sleeve 111 to slide in the transverse direction through the two front claws 131. On the other hand, the second guide rod 112 can support and guide the movement of the slider 108 to make the slider 108 move more smoothly. The rear claw 132 slides and cooperates with the guide groove 133 provided in the transverse direction on the frame 105. The guide groove 133 can also support and guide the movement of the slider 108, making the slider 108 move more smoothly.

As shown in Figures 1 and 3, in some embodiments, the manual forklift 100 further includes a manually operable rotating handle 134. The rotating handle 134 is detachably connected to the screw 107 to drive the screw 107 to rotate. Since the rotating handle 134 is detachably connected to the lead screw 107, when there is no need to adjust the distance between the two forks 104, the rotating handle 134 can be removed from the forklift to shorten the overall width of the forklift.

The number of the rotating handle 134 may be one, and the rotating handle 134 may be connected to any one of the lead screws 107 . Optionally, the number of rotating handles 134 may also be two to be connected to the two lead screws 107 respectively.

In some embodiments, one of the rotary handle 134 and the lead screw 107 is provided with a non-circular slot 135 and the other is provided with a non-circular plug 136. The rotary handle 134 is connected through a plug-in fit between the plug and the slot. It is connected to the screw 107, so the rotating handle 134 can be connected or separated from the screw 107 by plugging and unplugging, and the operation is simple and convenient. The shape of the non-circular socket 135 and the non-circular plug 136 may be polygonal or other non-circular shapes.

The above descriptions are only examples of the present application and are not intended to limit the present application. To those skilled in the art, various modifications and variations may be made to this application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application shall be included in the scope of the claims of this application.

Claims

A manual forklift, wherein the manual forklift defines mutually perpendicular transverse directions, longitudinal directions and vertical directions,

include:

a frame defining a vertical centerline passing through the center of the frame in the vertical direction;

Two lead screws are relatively independent and rotatably provided on the frame, and the two lead screws are respectively arranged along the transverse direction and located on opposite sides of the vertical centerline;

Two slide blocks are threadedly connected to the two lead screws respectively, and the rotation of the lead screw drives the slide blocks to move in the transverse direction;

Two cargo forks are respectively arranged along the longitudinal direction and located on opposite sides of the vertical centerline, and the two cargo forks are respectively fixedly connected to the two slide blocks;

Wherein, the rotation of any of the screws causes the slider connected to it to move in the transverse direction, and the movement of the slider drives the fork connected to it to move closer to or away from the vertical centerline. direction to continuously adjust the spacing between the two forks.
The manual forklift of claim 1, further comprising:

A first guide rod is fixed on the frame and is arranged along the transverse direction. The first guide rod passes through the two slide blocks and is used to guide the two slide blocks along the transverse direction. move.
The manual forklift as claimed in claim 1 or 2, further comprising:

a second guide rod, fixed on the frame and disposed along the transverse direction;

Two connecting sleeves are slidably sleeved outside the second guide rod respectively, and respectively correspond to the positions of the two slide blocks. At least part of the connecting sleeve extends into the corresponding slide block, so as to The connecting sleeve can move along the transverse direction with the slider;

Two drawbars are respectively arranged at the bottoms of the two forks along the longitudinal direction. One end of the two drawbars is rotatably connected to the two connecting sleeves, and the other ends of the two drawbars are respectively They are respectively rotatably connected to the lifting wheel assemblies at the bottom of the two forks, so that the drawbar can move in the transverse direction along with the connecting sleeve and the slider.
The manual forklift of claim 3, further comprising:

Support base;

A hydraulic pump is provided above the support base. The hydraulic pump has a hydraulic rod arranged along the vertical direction. The hydraulic rod is connected to the frame and is used to drive the frame and the two The forks are raised;

A swing arm, one end of which is rotatably connected to the support base, and the other end of which is rotatably connected to the second guide rod;

At least one third guide rod is fixed on the other end of the swing arm, the third guide rod is arranged along the transverse direction and passes through the two connecting sleeves;

Wherein, when the hydraulic pump drives the vehicle frame and the two forks to rise, the connecting sleeve swings downward around the second guide rod along with the swing arm, and the direction of the connecting sleeve is The downward swing drives the drawbar to push the lifting wheel assembly to swing downward.
The manual forklift of claim 4, further comprising:

A support wheel is rotatably provided below the support base;

A push rod is swingably disposed above the support base, and a handle is provided at the upper end of the push rod.
The manual forklift of claim 4, wherein the frame includes:

The frame is provided with two chute corresponding to the two forks respectively, the two chute respectively extends along the transverse direction, and the two forks are slidingly connected with the two chute respectively;

A cover plate is fixed above the frame, a receiving space is formed between the cover plate and the frame, two screws, two slide blocks, two connecting sleeves, and the second guide The rod and the third guide rod are both located in the accommodation space;

Partition plates are arranged along the vertical centerline in the accommodation space. The partition plates are fixedly connected to the frame and the cover plate respectively, and are used to support the two lead screws and the second second screw. Guide rod.
The manual forklift of claim 3, wherein each slide block has:

Two front claws are spaced apart in the transverse direction, the two front claws are located on opposite sides of the corresponding connecting sleeve, and are in sliding cooperation with the second guide rod;

The rear claw is slidably matched with the guide groove provided along the transverse direction on the vehicle frame.
The manual forklift as claimed in claim 1 or 2, further comprising:

A manually operable rotating handle is detachably connected to the lead screw to drive the lead screw to rotate.
The manual forklift as claimed in claim 8, wherein,

One of the rotary handle and the lead screw is provided with a non-circular slot and the other is provided with a non-circular plug. The plug and the slot are connected to the rotary handle and all the screws through plug-fitting. The screw connection is described.
The manual forklift as claimed in claim 1 or 2, wherein,

The spacing between the two forks is anywhere from 16 inches to 27 inches.