Internal combustion counterbalanced fork lift truck with stabilizing mechanism

Abstract

The present application relates to the technical field of internal combustion counterbalanced forklift, in particular to an internal combustion counterbalanced forklift with a stabilizing mechanism, which comprises a forklift body and a portal, the portal is installed at one end of the forklift body, further comprising a clamping mechanism and a sliding mechanism, the clamping mechanism is installed at the side of the portal, and the sliding mechanism is installed inside the forks; the pressure plate in the stabilizing mechanism is displaced under the gravity of the goods, the rack drives the annular gear to make the transverse rotating shaft rotate, the rotating transverse rotating shaft drives the rotation of the worm assembly through the meshing of the driving bevel gear and the driven bevel gear, so that the worm assembly drives the rotation of the worm gear rod, the rotating thread on the worm gear rod and the rolling ball thread arranged on the inner wall of the sleeve move, so that the sleeve moves forward.

Description

Technical Field

[0001] This invention relates to the field of internal combustion counterbalanced forklift technology, and more specifically to an internal combustion counterbalanced forklift with a stabilizing mechanism. Background Technology

[0002] Internal combustion counterbalance forklifts are a common type of industrial forklift that uses an internal combustion engine as its power source, typically a fuel engine such as a gasoline or diesel engine. These forklifts are designed to provide stability, enabling them to perform material handling and stacking operations in a variety of industrial environments. The design takes balance into account, typically featuring a heavy-duty back counterbalance weight to ensure vertical stability when lifting and moving heavy loads, thereby improving the forklift's transport efficiency and single-load capacity. The front of the forklift is equipped with a pair of vertically movable clamping mechanisms for inserting and lifting goods. These clamping mechanisms can be adjusted in width to accommodate goods of different sizes.

[0003] Existing internal combustion counterbalance forklifts can control the mast via a control system, thereby adjusting the angle of the clamping mechanism to insert, transport, and unload goods placed on wooden pallets. Especially during transport, vertical stability is achieved by tilting the goods towards the forklift body. During transport, the weight of the goods on the wooden pallet is converted into pressure on the upper surface of the clamping mechanism. This pressure is converted into static friction to achieve stability when the goods tend to move. However, after long-term use, the surface of the clamping mechanism becomes smooth, and the relative coefficient of friction decreases, resulting in a reduction in the stable static friction force. This makes it difficult to guarantee the stability of the goods during transport, especially when forklifts transport liquid packaged products such as milk, beverages, and liquid condiments. During transport, especially when turning, the internal packaging leaves space to prevent leakage and breakage, causing the goods to sway more. As a result, the wooden pallet tends to sway horizontally. If the forklift driver operates improperly or at excessive speed, it may even lead to serious situations such as the goods tipping over.

[0004] In view of the above, in order to overcome the above technical problems, the present invention designs an internal combustion counterbalance forklift with a stabilizing mechanism, thus solving the above technical problems. Summary of the Invention

[0005] The technical objective of this invention is to design an internal combustion counterbalance forklift with a stabilizing mechanism. The clamping mechanism is driven by the downward pressure of the cargo to apply compressive force to both sides of the wooden pallet, thereby improving the stability of the forklift during movement and reducing the possibility of cargo tipping over.

[0006] To achieve the above-mentioned technical objectives, the present invention provides the following technical solution:

[0007] This invention provides an internal combustion counterbalanced forklift with a stabilizing mechanism, comprising a forklift body and a mast. The mast is mounted at one end of the forklift body. The mast can swing at a certain angle around a rotating support at the lower part of the mast through an operating system and hydraulic system set in the forklift body. It also includes a clamping mechanism and a sliding mechanism. The clamping mechanism is mounted on the side of the mast, and the sliding mechanism is mounted inside the clamping mechanism, specifically in a mounting slot and a mounting hole. The pressure plate in the clamping mechanism is displaced under the weight of the load, and the rack drives the ring gear to rotate the transverse shaft. The rotating transverse shaft drives the worm gear assembly to rotate through the meshing of the driving helical gear and the driven helical gear. The worm gear assembly drives the worm wheel to rotate, and the rotating thread on the worm wheel and the ball thread set on the inner wall of the sleeve move, so that the sleeve can move forward.

[0008] The clamping mechanism includes a longitudinal frame, a transverse frame, a pressure plate, a transverse rotating shaft, a bearing, a worm gear assembly, a fixing block, a clamping assembly, and a worm wheel. The pressure plate is mounted on top of the clamping mechanism, specifically by being snapped into the bottom of the mounting slot by a return spring, and then secured by a brake baffle set around the upper edge of the mounting slot, thus achieving fixation without external force. The transverse rotating shaft is installed inside the rotating through hole, extending through the entire mounting slot. The bearing is installed inside the mounting through hole, reducing the friction between the worm gear assembly and the mounting through hole. The worm gear assembly is installed in the middle of the bearing, converting the rotational force of the transverse rotating shaft into vertical rotational motion. The central axes of the worm gear assembly and the rotating shaft are located in the same plane and perpendicular to each other, facilitating power transmission via helical gears. The fixing block is mounted on top of the fixed slide rail, the clamping assembly is installed inside the fixing block, and the worm wheel is installed on one side of the worm gear assembly.

[0009] The longitudinal frame is installed on the side of the mast. It moves with the mast to facilitate the insertion and placement of goods. The transverse frame is installed on the side of the longitudinal frame. It is the main component for inserting and placing goods. It is worth noting that all forklift operations are based on transporting goods on standard wooden pallets. The transverse and longitudinal frames are perpendicular, and their intersection provides better fixation for the wooden pallets. The surface of the longitudinal frame has sliding grooves, and the two sides of these grooves have bidirectional sliding grooves. The upper surface of the transverse frame has a mounting slot, and a pressure plate is installed inside. Limit blocks are installed on the two sides of the mounting slot to help ensure the parallelism between the pressure plate and the upper surface of the transverse frame during movement. A brake baffle is installed on the upper edge of the mounting slot. The brake baffle is a rectangular ring structure. The brake baffle is used to cooperate with the mating baffle to achieve static fixation of the pressure plate. Two fixed slide rails are installed on the upper part of the transverse frame. The fixed slide rails have two functions: one is to install the fixing block, and the other is to fit with the mating notch to achieve the limiting and fixing function of the clamping assembly. A mounting through hole is opened on the upper part of the transverse frame. The mounting through hole is used to install the bearing to help the worm gear assembly achieve rotation with less friction. The center of the mounting through hole is located on the perpendicular bisector of the line connecting the midpoints of the two fixed slide rails. This design makes the power transmission between the worm gear assembly and the worm wheel more uniform. A rotating through hole is opened on the side of the mounting slot near the frame body. The rotating through hole is used to install the transverse shaft and support the transverse shaft. The limiting block has a triangular cross-sectional shape, which provides good stability and sufficient limiting force through its two sides, ensuring that the pressure plate remains perpendicular to the transverse frame during the pressing process. The fixed slide rail has a trapezoidal cross-section, which provides a more even torque. This not only effectively fixes the fixed plate (through welding) but also eliminates any potential lateral displacement of the clamping assembly during sliding. The fixed slide rail is symmetrically positioned relative to the mounting through-hole, ensuring that the torque center of the extrusion plate is located as close to the center point as possible, thus improving the evenness of the applied pressure torque during the extrusion process.

[0010] The upper surface of the pressure plate is decorated with a V-shaped surface pattern, which increases the static friction between the pressure plate and the wooden pallet and solves the problem of smooth surface of the clamping mechanism after long-term use. A matching baffle is installed at the lower edge of the pressure plate. The matching baffle is used to lock under the brake baffle to fix the pressure plate. The matching baffle and the brake baffle are the same shape, and their corresponding surfaces are treated with wear resistance. The upper and lower sides of the matching baffle have triangular limiting notches, which, together with the limiting block, ensure that the pressure plate can only move parallel to the upper surface of the transverse frame. A rack and a return spring are linearly installed on the inner surface of the pressure plate. The return spring and the rack are staggered to distribute and support the pressure torque of the goods. Sliding holes are opened on both sides of the pressure plate. The cross-sectional shape of the sliding holes is arched. The arched sliding holes can avoid affecting the movement of the transverse shaft during the movement of the pressure plate.

[0011] The surface of the transverse rotating shaft is provided with annular teeth at intervals. The spacing between adjacent annular teeth is the same as the spacing of the rack, thereby enabling multiple racks and annular teeth to engage and ensure the movement stability of the transverse rotating shaft. A connecting shaft is installed at one end of the transverse rotating shaft, and the driving helical gear is installed on the side of the connecting shaft. The driving helical gear is used to convert the horizontal rotation into the rotation of the worm gear assembly. When the cargo is pressed down on the pressure plate, the surface pattern can reduce the risk of lateral displacement of the cargo position. Under the limiting action of the limiting notch, the pressure plate slides downward parallel. During this process, the rack and annular teeth mesh, driving the transverse rotating shaft to rotate in the rotating through hole.

[0012] The worm gear assembly includes a worm shaft, a helical blade, an extension shaft, and a driven helical gear. The worm shaft is installed inside a bearing and rotates to drive the helical blade. The helical blade is installed on the surface of the worm and meshes with the worm gear teeth to achieve the unidirectional rotation principle of the worm gear. The extension shaft is installed below the worm shaft, and the driven helical gear is installed below the extension shaft. The driven helical gear meshes with the driving helical gear, thereby converting the rotation of the transverse shaft into the rotation of the worm shaft. The fixing block includes a horizontal slide groove, a limiting slide groove, a contact surface, a mating through hole, and a fixing groove. The horizontal slide groove is formed on the side of the fixing block, and the limiting slide groove is formed on... On the side of the horizontal slide, the limiting slide is used to further enhance the limiting effect in conjunction with the fixed slider, thereby ensuring that the extrusion plate can only push the wooden pallet horizontally. The top of the fixed block is set as the contact surface, and the cross-section of the contact surface is curved. Due to improper operation by the operator, the fixed block may come into contact with the wooden pallet. By setting the contact surface with a curved cross-section, the damage caused in this case can be reduced. The mating through hole is opened on the bottom of the fixed block. The mating through hole is used to install the worm gear shaft and bearing. The position of the mating through hole coincides with the installation through hole. The fixing groove is opened at the bottom of the side of the fixed block. The fixing groove and one end of the fixing slide are attached and fixed by welding, thereby strengthening the fixing effect of the fixing plate.

[0013] The clamping assembly includes a sleeve, a fixed slider, a pressing plate, a mating notch, a support rod, and balls. The sleeve is installed inside a horizontal slide groove and works with a worm gear to push the pressing plate forward. The fixed slider is installed on the side of the sleeve and further limits the pushing direction of the sleeve, ensuring it can only push the pressing plate horizontally. The pressing plate is installed on the side of the sleeve, and the mating notch is located at the lower end of the pressing plate. The mating notch slides on a fixed slide rail to prevent lateral deviation. The support rod is installed on the surface of the sleeve and is L-shaped. The L-shaped support rod helps the pressing plate distribute the pressing force evenly, resulting in a better pressing effect. A ring array of balls is installed on the inner surface of the sleeve. The balls work with a rotating thread to push the sleeve. The surface of the worm gear has worm teeth, and the lower part of the worm gear surface has a rotating thread. The rotating thread is helical, and its width is the same as the diameter of the balls. This reduces the friction between the rotating thread and the balls while ensuring a tight meshing and improving power transmission efficiency.

[0014] The sliding mechanism includes a sliding component and a buffer component. The sliding component is installed inside the sliding groove, and the buffer component is installed at the bottom of the sliding groove. The sliding component includes a counterweight slider, side wing plates, fixing pins, rollers, and anti-slip pads. The counterweight slider is installed inside the sliding groove, the side wing plates are installed on both sides of the counterweight slider, the fixing pins are linearly arranged on both sides of the side wing plates, and the rollers are installed on the sides of the fixing pins. The rollers can rotate around the fixing pins, thereby converting the original sliding friction between the side wing plates and the bidirectional sliding groove into rolling friction with lower friction, reducing energy loss and increasing work efficiency. The anti-slip pad is installed on the side of the counterweight slider. The anti-slip pad is made of soft rubber and is used to cooperate with the wooden pallet. The clamping mechanism generates pressure between the wooden pallet and the anti-slip pad. This pressure is converted into static friction when the wooden pallet has an upward displacement tendency. Under the action of static friction, the wooden pallet moves upward. The buffer assembly includes a buffer spring, a connecting plate and a buffer pad. One end of the buffer spring is engaged with the bottom of the sliding groove, the connecting plate is engaged with the other end of the buffer spring, and the buffer pad is installed above the connecting plate. The buffer pad is made of shock-absorbing material, specifically soft rubber. The cross-section of the buffer pad is an isosceles trapezoid. The isosceles trapezoid can buffer the gravity of the counterweight slider falling and transfer it to the buffer spring, thereby reducing the damage to the clamping mechanism caused by the falling counterweight slider.

[0015] The beneficial effects of this invention are as follows:

[0016] 1. This invention, by setting up a clamping mechanism, uses the downward force of the cargo to drive the clamping mechanism to move, applying compressive force to both sides of the wooden pallet. This solves the problem of the lack of a stable structure for horizontal movement of cargo in the prior art, reduces the disadvantage of the large centripetal force during the turning process of the internal combustion counterbalance forklift, which causes the wooden pallet to shift. This improves the stability of the forklift during movement and reduces the possibility of cargo tipping over.

[0017] 2. By setting up a worm gear assembly and a worm wheel, and taking advantage of the unidirectional transmission characteristic of the worm gear, this invention prevents the clamping mechanism from reversing due to movement during cargo transportation, thereby improving the working reliability of the clamping mechanism and extending its service life.

[0018] 3. By setting up a sliding mechanism, this invention solves the awkward situation where the clamping mechanism cannot release the wooden pallet in time after clamping it, and avoids the component damage problems that may occur when using rigid separation. By using the sliding component to match the existing forklift workflow, this invention solves the problem of quickly squeezing and stabilizing goods during the transportation of wooden pallets and quickly releasing the squeezing of wooden pallets during unloading without significantly changing the logic of existing forklift operation, thereby improving work efficiency. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] The above and other aspects of the invention will now be described by way of example only, with reference to the accompanying drawings, in which:

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the clamping mechanism of the present invention;

[0023] Figure 3 This is a partial cross-sectional view of the transverse frame of the present invention;

[0024] Figure 4 This is the present invention. Figure 3 Enlarged diagram of AA in the middle;

[0025] Figure 5 This is a cross-sectional view of the fixing block of the present invention;

[0026] Figure 6 This is a diagram showing the fit between the pressure plate and the transverse rotating shaft of the present invention;

[0027] Figure 7 This is a schematic diagram showing the engagement of the worm gear assembly and the clamping assembly of the present invention;

[0028] Figure 8 This is a schematic diagram of the structure of the fixing block of the present invention;

[0029] Figure 9 This is an exploded view of the clamping assembly and worm gear of the present invention;

[0030] Figure 10 This is a partial cross-sectional view of the sliding mechanism of the present invention;

[0031] Figure 11 This is an exploded view of the sliding mechanism of the present invention;

[0032] Figure 12 This is a schematic diagram of the working process of the present invention.

[0033] In the diagram: 1. Forklift body; 2. Mast; 3. Clamping mechanism; 31. Longitudinal frame; 311. Sliding groove; 312. Bidirectional sliding groove; 32. Transverse frame; 321. Mounting through groove; 322. Limiting block; 323. Brake baffle; 324. Fixed slide rail; 325. Mounting through hole; 326. Rotation through hole; 33. Pressure plate; 331. Surface pattern; 332. Mating baffle; 333. Limiting notch; 334. Rack; 335. Return spring; 336. Sliding hole; 34. Transverse shaft; 341. Ring gear; 342. Connecting shaft; 343. Drive helical gear; 35. Bearing; 36. Worm gear assembly; 361. Worm gear shaft; 362. Spiral blade; 363. 364. Extended shaft; 37. Driven helical gear; 38. Fixed block; 39. Horizontal slide groove; 30. Limiting slide groove; 31. Contact surface; 32. Through hole; 33. Fixed groove; 34. Clamping assembly; 35. Sleeve; 36. Fixed slider; 37. Extrusion plate; 38. Mating notch; 39. Support rod; 30. Ball; 31. Worm gear; 32. Worm gear tooth; 33. Rotating thread; 4. Sliding mechanism; 41. Sliding assembly; 42. Buffer assembly; 411. Counterweight slider; 412. Side wing plate; 413. Fixed pin; 414. Roller; 415. Anti-slip pad; 421. Buffer spring; 422. Connecting plate; 423. Buffer pad. Detailed Implementation

[0034] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0035] like Figures 1 to 12 As shown, the present invention provides an internal combustion counterbalanced forklift with a stabilizing mechanism, including a forklift body 1 and a mast 2. The mast 2 is installed at one end of the forklift body 1. The mast 2 can swing at a certain angle around the rotating support of the lower part of the mast 2 through the operating system set in the forklift body 1 in conjunction with the hydraulic system. It also includes a clamping mechanism 3 and a sliding mechanism 4. The clamping mechanism 3 is installed on the side of the mast 2, and the sliding mechanism 4 is installed inside the clamping mechanism 3, specifically in the mounting through slot 321 and mounting through hole 325. The pressure plate 33 in the clamping mechanism 3 is displaced under the action of the weight of the goods, and drives the ring gear 341 through the rack 334 to rotate the transverse rotating shaft 34. The rotating transverse rotating shaft 34 drives the worm gear assembly 36 to rotate through the meshing of the driving helical gear 343 and the driven helical gear 364. Thus, the worm gear assembly 36 drives the worm wheel 39 to rotate. The rotating thread 392 on the worm wheel 39 and the rolling ball 386 set in the inner wall of the sleeve 381 move threadedly, so that the sleeve 381 can move forward.

[0036] like Figures 2 to 5As shown, the clamping mechanism 3 includes a longitudinal frame 31, a transverse frame 32, a pressure plate 33, a transverse rotating shaft 34, a bearing 35, a worm gear assembly 36, a fixing block 37, a clamping assembly 38, and a worm wheel 39. The longitudinal frame 31 is installed on the side of the mast 2 and is used to move under the drive of the mast 2 to facilitate the insertion and placement of goods, and to provide a certain support force to the goods during transportation. The transverse frame 32 is installed on the side of the longitudinal frame 31 and is the main component for inserting and placing goods. It is worth mentioning that wooden pallets are required for normal forklift transportation operations. In this embodiment, all forklifts... The operation is based on transporting goods on standard wooden pallets. The transverse frame 32 and the longitudinal frame 31 are perpendicular to each other. The perpendicular arrangement of the transverse frame 32 and the longitudinal frame 31 at their intersection provides better fixation for the wooden pallet. The surface of the longitudinal frame 31 has a sliding groove 311 for installing the sliding mechanism 4 and providing sliding space for the sliding mechanism 4. The two sides of the sliding groove 311 have bidirectional sliding grooves 312 for cooperating with the roller 414 and restricting the displacement path of the sliding component 41. The upper surface of the transverse frame 32 has a mounting through groove 321. The mounting slot 321 is used to install the transverse rotating shaft 34 and to install the pressure plate 33 inside. Limiting blocks 322 are installed on both sides of the mounting slot 321. The limiting blocks 322 are used to help ensure the parallelism between the pressure plate 33 and the upper surface of the transverse frame 32 during movement. A brake baffle 323 is installed on the upper edge of the mounting slot 321. The brake baffle 323 has a rectangular ring structure and is used to cooperate with the mating baffle 332 to achieve static fixation of the pressure plate 33. Two fixed slide rails 324 are installed on the top of the transverse frame 32. The fixed slide rails 324 have two functions: one is to install the fixing blocks 34. 7. Another feature is that it fits into the notch 384 to limit and fix the clamping assembly 38. The upper part of the transverse frame 32 has a mounting through hole 325 for mounting the bearing 35, thereby helping the worm gear assembly 36 to rotate with less friction. The center of the mounting through hole 325 is located on the perpendicular bisector of the line connecting the midpoints of the two fixed slide rails 324. This design makes the power transmission between the worm gear assembly 36 and the worm wheel 39 more uniform. The mounting through groove 321 has a rotating through hole 326 on the side near the frame body. The rotating through hole 326 is used to mount the transverse rotating shaft 34 and support the transverse rotating shaft 34.The limiting block 322 has a triangular cross-sectional shape, which provides good stability and sufficient limiting force through its two sides, ensuring that the pressure plate 33 remains perpendicular to the transverse frame 32 during the pressing process. The fixed slide rail 324 has a trapezoidal cross-section, which provides a more even torque. This not only effectively fixes the fixed plate (by welding) but also eliminates any potential lateral displacement of the clamping assembly 38 during the sliding process. The fixed slide rail 324 is symmetrically arranged relative to the mounting through hole 325, thereby ensuring that the torque center of the extrusion plate 383 is located as close to the center point as possible, improving the evenness of the applied pressure torque during the extrusion process.

[0037] like Figure 3 , Figure 4 and Figure 5 As shown, the pressure plate 33 is installed on top of the clamping mechanism 3. Specifically, it is installed by a return spring 335 snapping into the bottom of the mounting slot 321, and then by a brake baffle 323 set around the upper edge of the mounting slot 321 in conjunction with the baffle 332, thereby achieving fixation without external force. The transverse rotating shaft 34 is installed inside the rotating through hole 326 and passes through the entire mounting slot 321. The bearing 35 is installed inside the mounting through hole 325. The bearing 35 is used to reduce the friction between the worm gear assembly 36 and the mounting through hole 325. The worm gear assembly 36 is installed in the middle of the bearing 35. The worm gear assembly 36 is used to convert the rotational force of the transverse rotating shaft 34 into vertical rotational motion. The central axis of the worm gear assembly 36 and the rotating shaft are located on the same plane and perpendicular to each other, so as to facilitate the transmission of power through helical gears. The fixing block 37 is installed on top of the fixing slide rail 324. The clamping assembly 38 is installed inside the fixing block 37. The worm gear 39 is installed on one side of the worm gear assembly 36.

[0038] The operator controls the mast 2 via the forklift body 1 to insert the clamping mechanism 3 into the middle of the wooden pallet and lift it upwards. The pressure plate 33 is pressed down by the pressure from the wooden pallet, overcoming the elastic force of the return spring 335, which drives the transverse rotating shaft 34 to rotate. The rotating transverse rotating shaft 34 drives the worm gear assembly 36 to rotate, and the worm gear assembly 36 drives the worm wheel 39 to rotate. Under the limiting action of the fixed block 37, the clamping assembly 38 applies positive pressure to the outside of the wooden pallet, so that the two sides of the wooden pallet are clamped by the clamping assembly 38 and the sliding assembly 41 respectively.

[0039] like Figure 1 and Figure 6As shown, the upper surface of the pressure plate 33 is provided with a surface pattern 331, which is V-shaped. The V-shaped surface pattern 331 can increase the static friction between the pressure plate 33 and the wooden pallet and solve the problem of the surface smoothness of the clamping mechanism 3 after long-term use. A mating baffle 332 is installed at the lower edge of the pressure plate 33. The mating baffle 332 is used to lock under the brake baffle 323 to fix the pressure plate 33. The mating baffle 332 and the brake baffle 323 are designed to have the same shape, and the corresponding surfaces of the two are treated with wear resistance. The upper surface of the mating baffle 332... Triangular limiting notches 333 are provided on both sides of the pressure plate 33 to ensure that the pressure plate 33 can only move parallel to the upper surface of the transverse frame 32, in conjunction with the limiting block 322. A rack 334 and a return spring 335 are linearly installed on the inner surface of the pressure plate 33. The return spring 335 and the rack 334 are staggered to distribute and support the pressure torque of the goods. Sliding holes 336 are provided on both sides of the pressure plate 33. The cross-sectional shape of the sliding hole 336 is arched. The arched sliding hole 336 can avoid affecting the movement of the transverse rotating shaft 34 during the movement of the pressure plate 33.

[0040] like Figure 6 As shown, the surface of the transverse rotating shaft 34 is provided with annular teeth 341 at intervals. The spacing between adjacent annular teeth 341 is the same as the spacing of the rack 334, thereby enabling multiple racks 334 and annular teeth 341 to mesh and ensure the motion stability of the transverse rotating shaft 34. A connecting shaft 342 is installed at one end of the transverse rotating shaft 34, and the driving helical gear 343 is installed on the side of the connecting shaft 342. The driving helical gear 343 is used to convert the horizontal rotation into the rotation of the worm gear assembly 36. When the cargo presses down on the pressure plate 33, the surface pattern 331 can reduce the risk of lateral displacement of the cargo position. Under the limiting action of the limiting notch 333, the pressure plate 33 slides downward in parallel. During this process, the racks 334 and annular teeth 341 mesh, driving the transverse rotating shaft 34 to rotate in the rotating through hole 326.

[0041] like Figure 7 and Figure 8As shown, the worm gear assembly 36 includes a worm shaft 361, a helical blade 362, an extension shaft 363, and a driven helical gear 364. The worm shaft 361 is installed inside the bearing 35 and is used to rotate the helical blade 362 to drive it to rotate. The helical blade 362 is installed on the surface of the worm and meshes with the worm gear teeth 391 to achieve the unidirectional rotation principle of the worm gear. The extension shaft 363 is installed below the worm shaft 361, and the driven helical gear 364 is installed below the extension shaft 363. The driven helical gear 364 meshes with the driving helical gear 343, thereby converting the rotation of the transverse shaft 34 into the rotation of the worm shaft 361. The fixing block 37 includes a horizontal slide groove 371, a limiting slide groove 372, a contact surface 373, a mating through hole 374, and a fixing groove 375. The horizontal slide groove 371 is formed in the fixing block 37. On the side, the limiting groove 372 is formed on the side of the horizontal groove 371. The limiting groove 372 is used to cooperate with the fixed slider 382 to further enhance the limiting effect, thereby ensuring that the extrusion plate 383 can only push the wooden pallet horizontally. The upper part of the fixed block 37 is set as the contact surface 373. The cross section of the contact surface 373 is arc. Due to improper operation by the operator, the fixed block 37 may come into contact with the wooden pallet. By setting the contact surface 373 with an arc cross section, the damage caused in this case can be reduced. The mating through hole 374 is formed on the lower part of the fixed block 37. The mating through hole 374 is used to install the worm shaft 361 and the bearing 35. The position of the mating through hole 374 coincides with the installation through hole 325. The fixing groove 375 is formed on the bottom of the side of the fixed block 37. The fixing groove 375 and one end of the fixing rail 324 are attached and fixed by welding, thereby strengthening the fixing effect of the fixing plate.

[0042] like Figure 7 and Figure 9As shown, the clamping assembly 38 includes a sleeve 381, a fixed slider 382, ​​a pressing plate 383, a mating notch 384, a support rod 385, and a ball bearing 386. The sleeve 381 is installed inside the horizontal slide groove 371 and is used to cooperate with the worm gear 39 to push the pressing plate 383 forward. The fixed slider 382 is installed on the side of the sleeve 381 and can further limit the pushing direction of the sleeve 381, so that it can only push the pressing plate 383 horizontally. The pressing plate 383 is installed on the side of the sleeve 381. The mating notch 384 is opened at the lower end of the pressing plate 383 and slides on the fixed slide rail 324 to avoid lateral deviation. The support rod 385 is installed on the surface of the sleeve 381. The support rod 385 is L-shaped and can help the pressing plate 383 distribute the pressing force evenly, thereby bringing a better pressing effect. The rolling balls 386 are arranged in a ring on the inner surface of the sleeve 381. The rolling balls 386 are used to cooperate with the rotating thread 392 to achieve a pushing effect on the sleeve 381. The surface of the worm gear 39 is provided with worm gear teeth 391, and the lower part of the surface of the worm gear 39 is provided with a rotating thread 392. The rotating thread 392 is helical, and the width of the rotating thread 392 is the same as the diameter of the rolling balls 386. This reduces the friction between the rotating thread 392 and the rolling balls 386 while ensuring a tight meshing between them, thus improving the power transmission efficiency.

[0043] The worm gear 391 meshes with the spiral blade 362, causing the worm gear rod 39 to rotate. The rotating thread 392 rotates accordingly. The sleeve 381, which is fitted outside the worm gear rod 39, has rolling balls 386 on its inner surface that rotate inside the rotating thread 392. Under the action of the fixed block 37 and the fixed slider 382, ​​the sleeve 381 can only move forward horizontally. The limiting slide groove 372 is restricted on both sides by the fixed slide rail 324, thereby driving the extrusion plate 383 to extrude and lock the wooden pallet.

[0044] like Figure 10 and Figure 11As shown, the sliding mechanism 4 includes a sliding component 41 and a buffer component 42. The sliding component 41 is installed inside the sliding groove 311, and the buffer component 42 is installed at the bottom of the sliding groove 311. The sliding component 41 includes a counterweight slider 411, a side wing plate 412, a fixing pin 413, a roller 414, and an anti-slip pad 415. The counterweight slider 411 is installed inside the sliding groove 311 and is used to install other components. The side wing plate 412 is installed on both sides of the counterweight slider 411 and is used to limit the counterweight slider 411 within the bidirectional sliding groove 312 to ensure the relative horizontal sliding of the counterweight slider 411. The fixing pin 413 is linearly arranged on both sides of the side wing plate 412. The roller 414 is installed on the side of the fixing pin 413 and can rotate around the fixing pin 413, thereby converting the original sliding friction between the side wing plate 412 and the bidirectional sliding groove 312 into rolling friction with less friction, reducing energy loss and increasing work efficiency. The anti-slip pad 415 is installed on the side of the counterweight slider 411. The anti-slip pad 415 is made of soft rubber and is used to cooperate with the wooden pallet. The clamping mechanism 3 applies pressure between the wooden pallet and the anti-slip pad 415. This pressure is converted into static friction when the wooden pallet has an upward displacement tendency, and under the action of static friction, the wooden pallet moves upward. The buffer assembly 42 includes a buffer spring 421, a connecting plate 422, and a buffer pad 423. One end of the buffer spring 421 is engaged with the bottom of the sliding groove 311, thus buffering... The spring 421 is used to support the connecting plate 422, the buffer pad 423 and the sliding assembly 41 above. The connecting plate 422 is snapped onto the other end of the buffer spring 421. The buffer pad 423 is installed above the connecting plate 422. The buffer pad 423 is made of shock-absorbing material, specifically soft rubber. The cross-section of the buffer pad 423 is an isosceles trapezoid. The isosceles trapezoid can buffer the gravity of the falling counterweight slider 411 and transfer it to the buffer spring 421, thereby reducing the damage to the clamping mechanism 3 caused by the falling counterweight slider 411.

[0045] When the forklift lowers the goods, the mast 2 controls the clamping mechanism 3 to change from tilting inward (closer to the forklift body 1) to tilting outward. During this process, the end of the wooden pallet closest to the forklift body 1 contacts the ground first. The downward pressure on the wooden pallet changes from being entirely borne by the clamping mechanism 3 to being partially applied to the ground. However, the pressure plate 33 still does not move upward because the front wooden bracket is still pressing on the pressure plate 33. Since the pressure plate 33 is restricted by other components to only move parallel to the transverse frame 32, the pressure plate 33 remains in its lowest position. At this time, the clamping mechanism 3 maintains pressure supply to one side of the wooden pallet, so that the two sides of the wooden pallet are respectively clamped by the compression block and the anti-slip pad 415. The clamping mechanism 3 continues to descend under the action of the mast 2, and the wooden pallet has an upward tendency. Since the anti-slip pad 415 is installed on the sliding counterweight slider 411, the wooden pallet will move upward through static friction. As the sliding pad 415 slides upward, the rollers 414 mounted on the side wing plates 412 of the counterweight block, which rotate around the fixing pin 413, slide within the bidirectional sliding groove 312, thereby minimizing the impact of this friction. At this time, the pressure between the wooden pallet and the transverse frame 32 decreases, and the contact area 373 between the wooden pallet and the pressure plate 33 also decreases from the inside to the outside. The pressure plate 33 rises under the action of the return spring 335, and the clamping mechanism 3 no longer squeezes the wooden pallet, thus the wooden pallet and the clamping mechanism 3 separate as a whole, completing the unloading action. Since the pressure between the wooden pallet and the anti-slip pad 415 disappears, the static friction between the anti-slip pad 415 and the wooden pallet also disappears. The counterweight slider 411 falls under its own weight and, upon contacting the buffer pad 423, converts its kinetic energy into the elastic potential energy of the buffer spring 421 and distributes it evenly to the entire clamping mechanism 3 through the principle of damping, reducing damage to the counterweight slider 411.

[0046] During operation, the operator controls the mast 2 via the forklift body 1 to insert the clamping mechanism 3 into the center of the wooden pallet and lift it upwards. The force exerted by the wooden pallet on the pressure plate 33 overcomes the elastic force of the return spring 335, causing the pressure plate 33 to press down and push the goods. The surface pattern 331 reduces the risk of lateral displacement of the goods. Under the action of the limiting notch 333 and the limiting block 322, the pressure plate 33 slides downwards parallel. During this process, the rack 334 and the ring tooth 341 mesh with each other, driving the transverse rotating shaft 34 to rotate in the rotating through hole 326. The rotation of the transverse rotating shaft 34 drives the worm gear assembly 36, in which the helical blade 362 meshes with the worm gear tooth 391, driving the worm gear 39 to rotate. The rotation of the drive worm gear 39 drives the transmission thread 392 to rotate, causing the sleeve 381 to rotate externally, and the rolling ball 386 on the inner surface of the sleeve 381 to rotate inside the thread. The clamping assembly 38 applies positive pressure to the outside of the wooden pallet. During this process, the fixed slider 382 and the limiting groove 372 restrict the horizontal movement of the sleeve 381. The limiting groove 372 is restricted by the fixed slide rail 324, which restricts the sleeve 381 to only make horizontal displacement, thereby clamping the wooden pallet and improving stability during transportation.

[0047] When the forklift lowers the goods, the mast 2 controls the clamping mechanism 3 to switch from tilting inward (closer to the forklift body 1) to tilting outward. During this process, the end of the wooden pallet closest to the forklift body 1 contacts the ground first, causing the ground to bear part of the downward pressure on the wooden pallet. However, since the front wooden bracket is still pressing on the pressure plate 33, and the pressure plate 33 remains in its lowest position, the clamping assembly 38 still clamps the wooden pallet. At this time, the clamping mechanism 3 applies pressure to one side of the wooden pallet, so that both sides of the wooden pallet are clamped by the compression plate 383 and the anti-slip pad 415 respectively. The clamping mechanism 3 continues to descend, and the side of the wooden pallet closest to the forklift body 1 rises. The pressure provided by the compression plate 383 is converted into static friction between the wooden pallet and the anti-slip pad 415, causing the anti-slip pad 415 to slide upward. During this process, the rollers 414 on both sides of the counterweight slide within the bidirectional sliding groove 312, reducing the static friction. As the pressure on the wooden pallet and the transverse frame 32 decreases, the contact area 373 shrinks. Under the action of the return spring 335, the pressure plate 33 rises, and the clamping mechanism 3 no longer squeezes the wooden pallet, completing the unloading action. After unloading, the wooden pallet and the clamping mechanism 3 detach as a whole. Since the pressure between the wooden pallet and the anti-slip pad 415 disappears, the static friction between the anti-slip pad 415 and the wooden pallet disappears. The counterweight slider 411 undergoes a falling motion under its own weight. When it contacts the buffer pad 423, it converts its kinetic energy into the elastic potential energy of the spring and distributes it evenly through the damping principle, reducing damage to the counterweight slider 411.

[0048] Although the present disclosure has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to the embodiments of the present disclosure, which will be obvious to those skilled in the art. Therefore, such modifications or improvements made without departing from the spirit of the present disclosure are all within the scope of protection claimed by the present disclosure.

Claims

1. An internal combustion counterbalanced forklift with a stabilizing mechanism, comprising a forklift body and a mast, the mast being mounted at one end of the forklift body, characterized in that, It also includes a clamping mechanism and a sliding mechanism. The clamping mechanism is installed on the side of the gantry, and the sliding mechanism is installed inside the clamping mechanism. The pressure plate in the clamping mechanism is displaced under the gravity of the cargo, and the rack drives the ring gear to rotate the transverse shaft. The rotating transverse shaft drives the worm gear assembly to rotate through the meshing of the driving helical gear and the driven helical gear. As a result, the worm gear assembly drives the worm wheel to rotate. The rotating thread on the worm wheel and the ball thread set on the inner wall of the sleeve move, so that the sleeve can move forward. The clamping mechanism includes a longitudinal frame, a transverse frame, a pressure plate, a transverse rotating shaft, a bearing, a worm gear assembly, a fixing block, a clamping assembly, and a worm wheel. The longitudinal frame is installed on the side of the gantry, the transverse frame is installed on the side of the longitudinal frame, the pressure plate is installed on top of the clamping mechanism, the transverse rotating shaft is installed inside the transverse frame, the bearing is installed on top of the transverse frame, the worm gear assembly is installed in the middle of the bearing, the central axes of the worm gear assembly and the transverse rotating shaft are located in the same plane and are perpendicular to each other, the fixing block is installed on top of the transverse frame, the clamping assembly is installed inside the fixing block, and the worm wheel is installed on one side of the worm gear assembly. The transverse frame and the longitudinal frame are perpendicular to each other. The surface of the longitudinal frame has a sliding groove, and the two sides of the sliding groove have bidirectional sliding grooves. The upper surface of the transverse frame has an installation through groove, and the two sides of the installation through groove have limit blocks. The upper edge of the installation through groove has a brake baffle. Two fixed slide rails are installed on the top of the transverse frame. An installation through hole is opened on the top of the transverse frame. The center of the installation through hole is located on the perpendicular bisector of the line connecting the midpoints of the two fixed slide rails. A rotation through hole is opened on the side of the installation through groove near the frame body. The upper surface of the pressure plate is decorated with a V-shaped surface pattern. A matching baffle is installed at the lower edge of the pressure plate. Triangular limiting notches are provided on the upper and lower sides of the matching baffle. A rack and a return spring are linearly installed on the inner surface of the pressure plate. The return spring and the rack are staggered. Sliding holes are provided on both sides of the pressure plate. The cross-sectional shape of the sliding holes is arched. The surface of the transverse rotating shaft is provided with annular teeth at intervals, and the spacing between adjacent annular teeth is the same as the spacing of the rack. A connecting shaft is installed at one end of the transverse rotating shaft, and the driving helical gear is installed on the side of the connecting shaft. The worm gear assembly includes a worm shaft, a helical blade, an extension shaft, and a driven helical gear. The worm shaft is installed inside the bearing, and the helical blade is installed on the surface of the worm. The helical blade meshes with the worm wheel teeth to achieve the unidirectional rotation principle of the worm gear. The extension shaft is installed below the worm shaft, and the driven helical gear is installed below the extension shaft. The fixed block includes a horizontal slide groove, a limiting slide groove, a contact surface, a mating through hole, and a fixing groove. The horizontal slide groove is located on the side of the fixed block, the limiting slide groove is located on the side of the horizontal slide groove, the top of the fixed block is set as the contact surface, the cross-section of the contact surface is arc-shaped, the mating through hole is located on the bottom of the fixed block, and the fixing groove is located at the bottom of the side of the fixed block. The clamping assembly includes a sleeve, a fixed slider, a pressing plate, a mating notch, a support rod, and balls. The sleeve is installed inside the horizontal slide groove, the fixed slider is installed on the side of the sleeve, the pressing plate is installed on the side of the sleeve, the mating notch is opened at the lower end of the pressing plate, the support rod is installed on the surface of the sleeve, the support rod is L-shaped, and the balls are arranged in a ring array on the inner surface of the sleeve. The surface of the worm gear is provided with worm gear teeth, and the lower part of the surface of the worm gear is provided with a rotating thread. The sliding mechanism includes a sliding assembly and a buffer assembly. The sliding assembly is installed inside the sliding groove, and the buffer assembly is installed at the bottom of the sliding groove. The sliding assembly includes a counterweight slider, side wing plates, fixing pins, rollers, and anti-slip pads. The counterweight slider is installed inside the sliding groove, the side wing plates are installed on both sides of the counterweight slider, the fixing pins are linearly arranged on both sides of the side wing plates, the rollers are installed on the sides of the fixing pins, and the anti-slip pads are installed on the sides of the counterweight slider. The buffer assembly includes a buffer spring, a connecting plate, and a buffer pad. One end of the buffer spring is engaged with the bottom of the sliding groove, the connecting plate is engaged with the other end of the buffer spring, and the buffer pad is installed above the connecting plate. The cross-section of the buffer pad is an isosceles trapezoid.

2. The internal combustion counterbalance forklift with a stabilizing mechanism according to claim 1, characterized in that: The limiting block has a triangular cross-sectional shape, while the fixed slide rail has a trapezoidal cross-sectional shape. The fixed slide rail is symmetrically arranged relative to the mounting through hole.

3. The internal combustion counterbalance forklift with a stabilizing mechanism according to claim 1, characterized in that: The rotating thread is helical, and the width of the rotating thread is the same as the diameter of the ball.

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