A lifting high-column truck tarpaulin support structure

Abstract

The utility model provides a kind of not need to occupy the interior space of truck compartment, the lifting performance of tarpaulin support is not easily affected by the goods loaded in compartment, tarpaulin support can also better match with the height of truck compartment at the lowest height, and lifting type high rail truck tarpaulin support structure relates to truck tarpaulin support technical field.A kind of lifting type high rail truck tarpaulin support structure, including jacking mechanism, the jacking mechanism is installed in the top of the truck compartment, the jacking mechanism includes first hinge support, second hinge support, first jacking rod and second jacking rod, the first hinge support and the second hinge support are respectively connected with the truck compartment along the width direction of the truck compartment and slide horizontally, the upper end of the first jacking rod is hinged with tarpaulin support, and the lower end is hinged with first hinge support, the upper end of the second jacking rod is hinged with tarpaulin support, and the lower end is hinged with second hinge support.The utility model can better guarantee the service life of jacking mechanism.

Description

Technical Field

[0001] This utility model relates to the field of truck tarpaulin support technology, specifically a lifting high-sided truck tarpaulin support structure. Background Technology

[0002] A truck tarpaulin bracket is a frame installed on the cargo bed of a truck to support the tarpaulin covering the cargo bed. Truck tarpaulin brackets are generally arched. For high-sided trucks, there are currently two main installation methods for tarpaulin brackets: fixed installation on the cargo bed, where the height of the tarpaulin bracket cannot be adjusted during use; and a height-adjustable installation on the truck, where the height of the tarpaulin bracket can be adjusted according to actual needs. Because the height of the cargo loaded on a truck may exceed the height of the cargo bed, the height of the tarpaulin also needs to be adjusted accordingly. Therefore, the height-adjustable type of truck tarpaulin bracket is more common. The lifting height of a height-adjustable tarpaulin bracket generally does not exceed 2 meters.

[0003] For liftable truck tarpaulin supports, the following installation methods are currently mainly adopted: including a lifting mechanism and a lifting control mechanism. The lifting mechanism typically consists of four units located at the four corners of the truck bed. Each lifting mechanism includes a lifting rod and a guide groove. The guide groove is vertically installed on the truck bed. The lifting rod supports the truck tarpaulin support and is slidably connected to the guide groove. The lifting mechanism is connected to the lifting rod to control its vertical movement along the guide groove. Due to the inconvenience and high cost of installing pneumatic or hydraulic systems on the truck bed, the lifting control mechanism currently employs two main structures. One structure includes a drive mechanism and a lead screw vertically installed on the truck bed. The lead screw is threadedly engaged with the lifting rod. The drive mechanism is connected to the lead screw, which is generally located within the guide groove. The drive mechanism can be a motor or a hand-cranked drive mechanism, such as the electric tarpaulin machine for trucks disclosed in CN216783367U and the manual lifting mechanism for high-sided truck tarpaulins disclosed in CN220615629U. Another structure includes a drive mechanism, a first sprocket, a second sprocket, and a chain. The drive mechanism is connected to the first sprocket, and the chain is mounted on a chain drive mechanism composed of the first and second sprockets. Both ends of the chain are connected to a lifting rod. The drive mechanism drives the first sprocket to move the chain up and down, thereby controlling the lifting and lowering of the tarpaulin support through the chain. Examples include a lifting drive mechanism and lifting system for a high-sided truck tarpaulin disclosed in CN216545949U, and a split-type lifting device for a high-sided truck tarpaulin disclosed in CN218661563U. Existing lifting truck tarpaulin supports use a method of vertically sliding the lifting rod to lift the tarpaulin support. However, the width of the tarpaulin support generally does not exceed the width of the truck bed. In order to better match the height of the two sides of the tarpaulin support with the two sides of the truck bed at its lowest height (if the height of the tarpaulin support is too high above the truck bed when the cargo is not higher than the truck bed, it will affect the stability of the tarpaulin support), the lifting mechanism is usually set inside the truck bed. Setting the lifting mechanism inside the truck bed not only occupies space in the truck bed, but the applicant also found that the lifting rod and vertical guide channel are easily affected by the cargo loaded in the truck bed. For example, the cargo may collide with the lifting rod and vertical guide channel, causing them to deform. This makes it difficult to guarantee the lifting performance of the tarpaulin support during use. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a lifting high-sided truck tarpaulin support structure that does not occupy the interior space of the truck bed, makes the lifting performance of the tarpaulin support less affected by the cargo loaded in the truck bed, and allows the tarpaulin support to match the height of the truck bed well at the lowest height.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a lifting high-sided truck tarpaulin support structure, including a truck body, a tarpaulin support, a lifting control mechanism, and a lifting mechanism supported below the tarpaulin support to allow the tarpaulin support to move vertically and lift. The lifting mechanism is installed above the truck body. The lifting mechanism includes a first hinge support, a second hinge support, a first lifting rod, and a second lifting rod. The first hinge support and the second hinge support are respectively horizontally slidably connected to the truck body along the width direction of the truck body. The upper end of the first lifting rod is hinged to the tarpaulin support, and the lower end is hinged to the first hinge support. The upper end of the second lifting rod is hinged to the tarpaulin support, and the lower end is hinged to the second hinge support.

[0006] The lifting control mechanism is connected to the first hinge support and the second hinge support so that the first hinge support and the second hinge support slide horizontally in the width direction of the truck body at the same time, so that the tilt angle of the first lifting rod and the second lifting rod with respect to the vertical direction increases or decreases at the same time, thereby causing the tarpaulin support to move vertically and rise or fall.

[0007] Furthermore, the first lifting rod and the second lifting rod are symmetrically arranged on both sides of the centerline of the tarpaulin support.

[0008] Furthermore, the lifting control mechanism includes a motor and a first lead screw section and a second lead screw section rotatably mounted above the truck bed;

[0009] The first lead screw section and the second lead screw section are both arranged along the width direction of the truck body. The threads of the first lead screw section and the second lead screw section are opposite. The motor is connected to the first lead screw section and the second lead screw section to drive the first lead screw section and the second lead screw section to rotate synchronously in the same direction.

[0010] The first hinge support is sleeved on the first lead screw section and is threaded into the first lead screw section; the second hinge support is sleeved on the second lead screw section and is threaded into the second lead screw section.

[0011] Furthermore, the first hinge support and the second hinge support each include an outer sleeve and an inner sleeve installed inside the outer sleeve and rotatably engaged with the outer sleeve. The outer sleeve is provided with a plate that is slidably connected to it in the radial direction. The outer side of the inner sleeve is provided with a hole for the plate to be inserted into and engaged with to circumferentially limit the inner sleeve. The outer sleeve is also provided with a sliding member that is slidably connected to it in the axial direction. The sliding member is provided with a first mating surface that engages with the plate to push the plate outward in the radial direction of the outer sleeve during the sliding of the sliding member relative to the outer sleeve along the axial direction of the outer sleeve, thereby disengaging the plate from the hole. The sliding member is also provided with a second mating surface that engages with the plate to push the plate outward in the radial direction of the outer sleeve during the sliding of the sliding member relative to the outer sleeve along the axial direction of the outer sleeve, thereby disengaging the plate from the hole. The outer sleeve is also provided with a return spring that resets the sliding member and allows the plate to be inserted into the hole.

[0012] The first hinge support is threadedly engaged with the first lead screw section through its inner sleeve, and the lower end of the first lifting rod is hinged to the first hinge support through the outer sleeve of the first hinge support.

[0013] The second hinge support is threadedly engaged with the second lead screw section through its inner sleeve, and the lower end of the second lifting rod is hinged to the second hinge support through the outer sleeve of the second hinge support.

[0014] Both the first hinge support and the second hinge support have a front travel limit baffle on their front side that cooperates with their sliding member to push their sliding member to move backward so that their insert plate disengages from their insertion hole. Both the first hinge support and the second hinge support have a rear travel limit baffle on their rear side that cooperates with their sliding member to push their sliding member to move forward so that their insert plate disengages from their insertion hole.

[0015] Furthermore, the lifting control mechanism includes a winch rotatably mounted on the truck bed. The winch is provided with a first lifting control rope connected to the first hinge support and a second lifting control rope connected to the second hinge support. When the winch rotates, the first lifting control rope and the second lifting control rope can be lengthened or shortened synchronously through the winch.

[0016] Furthermore, the truck bed is equipped with a reset mechanism that causes the first and second lifting rods to increase their angle with the vertical direction, thereby lowering and resetting the tarpaulin support.

[0017] Furthermore, the reset mechanism is a spring with one end connected to the first lifting rod and the other end connected to the second lifting rod.

[0018] Furthermore, both the first lifting rod and the second lifting rod are provided with a front limiting member on their front side, and both the first lifting rod and the second lifting rod are provided with a rear limiting member on their rear side.

[0019] Furthermore, there are two lifting mechanisms, one of which is installed above the front side panel of the truck bed, and the other is installed above the rear crossbeam of the truck bed.

[0020] The beneficial effects of this utility model are:

[0021] This utility model installs the lifting mechanism above the truck bed. The lifting mechanism does not occupy the internal space of the truck bed and is not easily squeezed or collided with by the cargo. Therefore, the lifting performance of the tarpaulin support during use can be better guaranteed, and the service life of the lifting mechanism can be better guaranteed.

[0022] This lifting mechanism achieves the raising and lowering of the tarpaulin support by adjusting the tilt angle of the first lifting rod 31 and the second lifting rod 32 relative to the vertical direction. Compared with the existing structure of vertical sliding of the lifting rod, this structure can make the height of the lifting mechanism smaller when shortened under the same lifting stroke. Therefore, after its upward installation, it has little impact on the minimum height change of the tarpaulin support 2, and can also make the tarpaulin support match the height of the truck body better at the lowest height. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a top view of the present invention;

[0025] Figure 3 This is the right view of this utility model;

[0026] Figure 4 This is a schematic diagram of the hinged base;

[0027] Figure 5 This is a schematic diagram of the guide rail setup;

[0028] Figure 6 This is a schematic diagram of a lifting control mechanism;

[0029] The diagram shows: 1. Truck body; 2. Canopy support; 3. Lifting mechanism; 4. Lifting control mechanism; 5. Reset mechanism; 11. Front limiter; 12. Rear limiter; 13. Rear crossbeam; 14. Guide rail; 31. First lifting rod; 32. Second lifting rod; 33. First hinge support; 34. Second hinge support; 41. Motor; 42. First lead screw section; 43. Second lead screw section; 44. Winch; 45. First lifting control rope; 46. Second lifting control rope; 311. Inner sleeve; 312. Outer sleeve; 313. Sliding part; 314. Insert plate; 3111. First mating surface; 315. Second mating surface; 316. Reset spring; 317. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] like Figures 1 to 3 As shown, this utility model discloses a lifting high-sided truck tarpaulin support structure, including a truck body 1, a tarpaulin support 2, a lifting control mechanism 4, and a lifting mechanism 3 supported below the tarpaulin support 2 to allow the tarpaulin support 2 to move vertically and rise and fall. The lifting mechanism 3 is installed above the truck body 1 and includes a first hinge support 33, a second hinge support 34, a first lifting rod 31, and a second lifting rod 32. The first lifting rod 31 and the second lifting rod 32 support the tarpaulin support 2. The first hinge support 33 and the second hinge support 34 are horizontally slidably connected to the truck body 1 along the width direction of the truck body 1. The upper end of the first lifting rod 31 is hinged to the tarpaulin support 2, and the lower end is hinged to the first hinge support 33. The upper end of the second lifting rod 32 is hinged to the tarpaulin support 2, and the lower end is hinged to the second hinge support 34. The first hinge support 33 supports the first lifting rod 31, and the second hinge support 34 supports the second lifting rod 32. The lifting control mechanism 4 is connected to the first hinge support 33 and the second hinge support 34, so that the first hinge support 33 and the second hinge support 34 slide horizontally along the width direction of the truck body 1 simultaneously, so that the tilt angle of the first lifting rod 31 and the second lifting rod 32 with respect to the vertical direction increases or decreases simultaneously, thereby causing the tarpaulin support 2 to move vertically and rise or fall.

[0032] To better support the tarpaulin support 2, the first lifting rod 31 and the second lifting rod 32 are generally symmetrically arranged on both sides of the centerline of the tarpaulin support 2. The first lifting rod 31 and the second lifting rod 32 can be arranged in a figure-eight shape or an X shape, or even an inverted figure-eight shape. Figure 3 In the middle, the first lifting rod 31 and the second lifting rod 32 are arranged in a figure-eight shape.

[0033] During lifting, the lifting control mechanism controls the first hinge support 33 and the second hinge support 34 to slide horizontally along the width direction of the truck body 1, causing the first hinge support 33 and the second hinge support 34 to slide synchronously towards each other or away from each other (the specific sliding direction is set according to the arrangement structure of the first lifting rod and the second lifting rod), so that the tilt angle of the first lifting rod 31 and the second lifting rod 32 relative to the vertical direction decreases synchronously. This allows the tarpaulin support 2 to move vertically upward, thereby raising the tarpaulin support 2. During lowering, the lowering control mechanism controls the first hinge support 33 and the second hinge support 34 to slide in opposite directions, so that the tilt angle of the first lifting rod 31 and the second lifting rod 32 relative to the vertical direction increases synchronously, thereby moving the tarpaulin support 2 vertically downward, lowering the height of the tarpaulin support 2.

[0034] by Figure 3 Taking the arrangement of the first lifting rod 31 and the second lifting rod 32 in a V-shape as an example, specifically: when the lifting control mechanism causes the first hinge support 33 and the second hinge support 34 to slide synchronously towards each other along the width direction of the truck bed, the tilt angle of the first lifting rod 31 and the second lifting rod 32 relative to the vertical direction decreases synchronously, and the tarpaulin support 2 gradually rises; when the tarpaulin support 2 descends, the lifting control mechanism causes the first hinge support 33 and the second hinge support 34 to slide in opposite directions (synchronously sliding away from each other along the width direction of the truck bed), which can cause the tilt angle of the first lifting rod 31 and the second lifting rod 32 relative to the vertical direction to increase synchronously, and the tarpaulin support 2 gradually descends.

[0035] It should be noted that when the first lifting rod 31 and the second lifting rod 32 are arranged in an inverted V-shape, and the first hinge support 33 and the second hinge support 34 slide synchronously toward each other, the inclination angle of the first lifting rod 31 and the second lifting rod 32 relative to the vertical direction increases synchronously, and the height of the tarpaulin support 2 decreases. Conversely, when the first hinge support 33 and the second hinge support 34 slide synchronously toward each other, the inclination angle of the first lifting rod 31 and the second lifting rod 32 relative to the vertical direction decreases synchronously, and the height of the tarpaulin support 2 increases.

[0036] This utility model installs the lifting mechanism 3 above the truck bed 1. The lifting mechanism does not occupy the internal space of the truck bed and is not easily squeezed or collided with by the cargo. Therefore, the lifting performance of the tarpaulin bracket during use can be better guaranteed, and the service life of the lifting mechanism can be better guaranteed. The lifting mechanism of this invention includes a first hinge support 33, a second hinge support 34, a first lifting rod 31, and a second lifting rod 32. The first hinge support 33 and the second hinge support 34 are horizontally slidably connected to the truck bed 1 along the width direction of the truck bed 1. The upper end of the first lifting rod 31 is hinged to the tarpaulin support 2, and the lower end is hinged to the first hinge support 33. The upper end of the second lifting rod 32 is hinged to the tarpaulin support 2, and the lower end is hinged to the second hinge support 34. The lifting and lowering of the first lifting rod 31 and the second lifting rod 32 are achieved by adjusting the tilt angle of the first lifting rod 31 and the second lifting rod 32 relative to the vertical direction. Therefore, compared with the existing structure of vertical sliding of the lifting rod, this structure can make the height of the lifting mechanism smaller when shortened under the same lifting stroke. Therefore, after its upward installation, it has little impact on the minimum height change of the tarpaulin support 2, and can hardly have any impact. It can also make the tarpaulin support better match the height of the truck bed at the lowest height.

[0037] There can be one or more lifting mechanisms 3. To ensure the stability of the tarpaulin support, there are usually at least two lifting mechanisms 3. In this utility model, there are two lifting mechanisms 3. One lifting mechanism 3 is installed above the front side panel of the truck body 1 to support the front end of the tarpaulin support 2, and the other lifting mechanism 3 is installed above the rear crossbeam 13 of the truck body 1 to support the rear end of the tarpaulin support 2.

[0038] The lifting control mechanism 4 can be a pneumatic cylinder or a hydraulic cylinder. However, due to the inconvenience and high cost of arranging pneumatic or hydraulic systems on the truck bed, in this embodiment of the invention, as shown... Figure 3 As shown, the lifting control mechanism 4 includes a motor 41 and a first lead screw section 42 and a second lead screw section 43 rotatably mounted above the truck bed 1. The first lead screw section 42 and the second lead screw section 43 are both arranged along the width direction of the truck bed 1. The threads of the first lead screw section 42 and the second lead screw section 43 are opposite. The motor 41 is connected to the first lead screw section 42 and the second lead screw section 43 to drive the first lead screw section 42 and the second lead screw section 43 to rotate synchronously in the same direction. The first hinge support 33 is sleeved on the first lead screw section 42 and is threadedly engaged with the first lead screw section 42. The second hinge support 34 is sleeved on the second lead screw section 43 and is threadedly engaged with the second lead screw section 43.

[0039] The first lead screw segment 42 and the second lead screw segment 43 can be arranged on the same straight line or on different straight lines. In this embodiment of the present invention, the first lead screw segment 42 and the second lead screw segment 43 are arranged on the same straight line. When the first lead screw segment 42 and the second lead screw segment 43 are on the same straight line, the first lead screw segment 42 and the second lead screw segment 43 can be an integral structure or a separate structure. Figure 3 In the first lead screw section 42 and the second lead screw section 43 are on the same straight line. The first lead screw section 42 and the second lead screw section 43 are separate structures. The first lead screw section 42 and the second lead screw section 43 are connected (specifically through a coupling). The motor drives the second lead screw section 43 through the first lead screw section 42.

[0040] When the tarpaulin is raised or lowered, the motor is started, and the motor drives the first lead screw section 42 and the second lead screw section 43 to rotate synchronously in the same direction. Since the threads of the first lead screw section 42 and the second lead screw section 43 are opposite, the first hinge support 33 and the second hinge support 34 can slide synchronously towards each other or away from each other, thereby changing the tilt angle of the first lifting rod 31 and the second lifting rod 32 with respect to the vertical direction, and thus causing the tarpaulin support 2 to move vertically and rise or fall.

[0041] When the first hinge support 33 and the second hinge support 34 are slidably driven by the lead screw, the lead screw can also serve as a guide rail for the hinge support to slide horizontally along the width direction of the freight car body due to the circumferential limiting effect of the lifting rod. Of course, an additional guide rail 14 can also be provided to guide the hinge support to slide horizontally along the width direction of the freight car body (see...). Figure 5 This is done to reduce the force on the lead screw.

[0042] When the first hinge support 33 and the second hinge support 34 are driven to slide by the lead screw, the first hinge support 33 and the second hinge support 34 each include an outer sleeve 312 and an inner sleeve 311 installed inside the outer sleeve 312 and rotatably engaged with the outer sleeve 312. The outer sleeve 312 is provided with an insert plate 314 slidably connected to it in the radial direction, and the outer side of the inner sleeve 311 is provided with an insertion hole 3111 for inserting the insert plate 314 to circumferentially limit the inner sleeve 311. When the insert plate 314 is inserted into the insertion hole 3111, it circumferentially limits the inner sleeve, and the inner sleeve cannot rotate relative to the outer sleeve. The outer sleeve 312 is further provided with a sliding member 313 slidably connected to it along the axial direction. The sliding member 313 is provided with a first mating surface 315 that cooperates with the insert plate 314 to push the insert plate 314 outward along the radial direction of the outer sleeve 312 during the forward sliding of the sliding member 313 relative to the outer sleeve 312 along the axial direction of the outer sleeve 312, thereby disengaging the insert plate 314 from the insertion hole 3111. The outer sleeve 312 is also provided with a second mating surface 316 that cooperates with the insert plate 314 to push the insert plate 314 outward along the radial direction of the outer sleeve 312 during the backward sliding of the sliding member 313 relative to the outer sleeve 312 along the axial direction of the outer sleeve 312, thereby disengaging the insert plate 314 from the insertion hole 3111. The outer sleeve 312 is also provided with a return spring 317 to reset the sliding member 313, thereby allowing the insert plate 314 to insert into the insertion hole 3111. The first hinge support 33 is threadedly engaged with the first lead screw section 42 via its inner sleeve 311, and the lower end of the first lifting rod 31 is hinged to the first hinge support 33 via its outer sleeve 312. The second hinge support 34 is threadedly engaged with the second lead screw section 43 via its inner sleeve 311, and the lower end of the second lifting rod 32 is hinged to the second hinge support 34 via its outer sleeve 312. Both the first hinge support 33 and the second hinge support 34 have a front travel limiting baffle 7 on their front sides that engages with their sliding member 313 to push the sliding member 313 backward, thereby disengaging the insert plate 314 from its insertion hole 3111. Both the first hinge support 33 and the second hinge support 34 have a rear travel limiting baffle 8 on their rear sides that engages with their sliding member 313 to push the sliding member 313 forward, thereby disengaging the insert plate 314 from its insertion hole 3111.

[0043] In this embodiment of the invention, the first mating surface 315 and the second mating surface 316 are inclined surfaces relative to the sliding direction of the insert plate. During the forward or backward movement of the sliding member 313, it abuts against the insert plate through the corresponding inclined surfaces. The inclined surfaces generate a force that causes the insert plate to move outward in the radial direction along the outer sleeve 312, thereby pushing the insert plate to slide and disengage the insert plate 314 from the insertion hole 3111. When the surfaces of the insert plate with the first mating surface 315 and the second mating surface 316 are inclined surfaces, the first mating surface 315 and the second mating surface 316 can also be straight surfaces extending along the sliding direction of the insert plate.

[0044] Under normal conditions, the insert plate 314 is inserted into the insertion hole 3111, and the inner sleeve 311 of the hinge seat is circumferentially limited, preventing the inner sleeve 311 from rotating relative to the outer sleeve 312. Therefore, under normal conditions, when the lead screw rotates, the lead screw can cause the corresponding inner sleeve 311 and outer sleeve 312, i.e., the hinge seat, to move together along the lead screw, thereby moving the lower end of the corresponding lifting rod and realizing the height adjustment of the tarpaulin support 2. When the hinge seat moves along the lead screw and is about to raise the tarpaulin support 2 to the set maximum height, the travel limit baffle on one side of the hinge seat will abut against the sliding member 313. Assuming this travel limit baffle is the front travel limit baffle 7, as the hinge seat continues to move, the front travel limit baffle 7 will push the sliding member 313 to gradually move backward along the outer sleeve 312. This causes the insert plate to gradually move outward along the radial direction of the outer sleeve through the second mating surface 316, gradually disengaging the insert plate 314 from the insertion hole 3111. This allows the inner sleeve 311 to rotate with the lead screw within the outer sleeve. In this way, the hinge seat will not continue to move with the lead screw after moving to the front limit position, protecting the entire tarpaulin support and the motor. Furthermore, this method offers better reliability compared to using limit switches to control motor start / stop. The return spring will deform during the outward movement of the insert plate along the radial direction of the outer sleeve. When the lead screw reverses, the inner sleeve 311 and the outer sleeve are subjected to a sliding force in the opposite direction (assuming this direction is the rearward side). The force between the sliding member 313 and the front stroke limit baffle 7 will decrease. At this time, under the action of the rebound force of the return spring 317, the insert plate 314 can be pushed to slide inward and reset, and the sliding member 313 will also be reset. The inner sleeve 311 is circumferentially limited, and the hinge seat can move rearward along the lead screw, reducing the height of the tarpaulin bracket 2. When the hinge seat moves along the lead screw and is about to lower the tarpaulin bracket 2 to the set minimum height position, the rear stroke limit baffle on the rear side of the hinge seat will abut against the sliding member 313, causing the sliding member 313 to slide forward relative to the outer sleeve. Thus, the insert plate gradually disengages from the insertion hole 3111 through the second mating surface 316. In this way, the hinge seat will not continue to move with the lead screw rotation after moving to the rear limit position. When it is necessary to raise the tarpaulin support 2, the lead screw reverses again, the inner sleeve 311 and the outer sleeve are subjected to a force in the forward direction, the force between the sliding member 313 and the rear stroke limit baffle 8 will decrease, at this time, under the action of the return spring 317, the insert plate 314 can be pushed to slide inward to reset, and at the same time the sliding member 313 is reset, the inner sleeve 311 is circumferentially limited, the hinge seat can move forward along the lead screw, and the height of the tarpaulin support 2 is raised.

[0045] In some embodiments, such as Figure 6As shown, the lifting control mechanism 4 includes a winch 44 rotatably mounted on the truck bed 1. The winch 44 is provided with a first lifting control rope 45 connected to the first hinge support 33, and a second lifting control rope 46 connected to the second hinge support 34. When the winch 44 rotates, the first lifting control rope 45 and the second lifting control rope 46 can be wound or released by the winch 44, so that the first lifting control rope 45 and the second lifting control rope 46 become longer or shorter synchronously.

[0046] When it is necessary to raise the tarpaulin support 2, the drive winch 44 rotates in the direction of winding the first lifting control rope 45 and the second lifting control rope 46. The first lifting control rope 45 and the second lifting control rope 46 shorten synchronously, thereby pulling the first hinge support 33 and the second hinge support 34 to slide in the corresponding direction that raises the tarpaulin support 2, so that the tarpaulin support can be raised. Figure 3 In this configuration, the direction in which the tarpaulin support 2 is raised is such that the first hinge support 33 and the second hinge support 34 move closer to each other. Because the lifting rod can exert a force on the hinge supports, causing them to slide in the opposite direction, when it is necessary to lower the tarpaulin support 2, the winch 44 rotates in the opposite direction, releasing the first lifting control rope 45 and the second lifting control rope 46. The hinge supports, losing the constraint of their respective lifting control ropes, can then automatically slide in the opposite direction, thereby lowering the tarpaulin support. The specific rotation direction of the winch 44 in releasing the lifting control ropes is determined by the winding method of the lifting control ropes.

[0047] In some embodiments, the lifting control mechanism 4 further includes a motor 41, which is connected to the winch 44 to drive the winch 44 to rotate. That is, the winch 44 is driven by a motor. In some embodiments, the winch 44 is driven manually.

[0048] Compared to lifting control mechanisms that use lead screws, the aforementioned lifting control mechanism has a lower cost.

[0049] When the tarpaulin support is at its maximum height, the angle between the lifting rod and the vertical direction is at its minimum, and the force exerted by the lifting rod on the hinge support to make it slide in the opposite direction is also at its minimum. This may result in an inability to overcome friction, preventing it from sliding in the opposite direction. Therefore, the truck body 1 is equipped with a reset mechanism 5 that increases the angle between the first lifting rod 31 and the second lifting rod 32 and the vertical direction, thereby causing the tarpaulin support 2 to descend and reset. Figure 6 As shown in this embodiment of the invention, the reset mechanism 5 is a spring with one end connected to the first lifting rod 31 and the other end connected to the second lifting rod 32. Alternatively, the spring can also be connected with one end to the first lifting rod 31 and the other end to the truck bed.

[0050] like Figure 2 , Figure 3As shown, both the first lifting rod 31 and the second lifting rod 32 are provided with a front limiting member 11 on their front sides, and both the first lifting rod 31 and the second lifting rod 32 are provided with a rear limiting member 12 on their rear sides. The front limiting member 11 and the rear limiting member 12 can limit the corresponding lifting rods, which can prevent or reduce the occurrence of bending deformation of the lifting rods to the front and rear sides when subjected to force.

Claims

1. A lift-type tarpaulin support structure for a high-sided truck bed, comprising a truck bed (1), a tarpaulin support (2), a lift control mechanism (4), and a jacking mechanism (3) disposed below the tarpaulin support (2) to vertically move the tarpaulin support (2) to be lifted, characterized in that: The jacking mechanism (3) is installed above the truck compartment (1), the jacking mechanism (3) comprises a first hinge support (33), a second hinge support (34), a first jacking rod (31) and a second jacking rod (32), the first hinge support (33) and the second hinge support (34) are respectively connected with the truck compartment (1) along the width direction of the truck compartment (1) and slide horizontally, the upper end of the first jacking rod (31) is hinged with the tarpaulin support (2), the lower end is hinged with the first hinge support (33), the upper end of the second jacking rod (32) is hinged with the tarpaulin support (2), and the lower end is hinged with the second hinge support (34); The lifting control mechanism (4) is connected with the first hinge support (33) and the second hinge support (34) to make the first hinge support (33) and the second hinge support (34) slide horizontally along the width direction of the truck compartment (1) synchronously, so that the first jacking rod (31) and the second jacking rod (32) increase or decrease the inclination angle in the vertical direction synchronously, and then the tarpaulin support (2) moves vertically to lift.

2. A tarpaulin support structure for a high-sided van as claimed in claim 1, wherein: The first jacking rod (31) and the second jacking rod (32) are symmetrically arranged on both sides of the center line of the tarpaulin support (2).

3. The tarpaulin support structure of claim 1, wherein: The lifting control mechanism (4) comprises a motor (41) and a first screw rod segment (42) and a second screw rod segment (43) rotatably installed above the truck compartment (1); The first screw rod segment (42) and the second screw rod segment (43) are arranged along the width direction of the truck compartment (1), the threads of the first screw rod segment (42) and the second screw rod segment (43) are opposite, and the motor (41) is in transmission connection with the first screw rod segment (42) and the second screw rod segment (43) to drive the first screw rod segment (42) and the second screw rod segment (43) to rotate synchronously and in the same direction. The first hinge support (33) is sleeved on the first screw rod segment (42) and matched with the thread of the first screw rod segment (42), and the second hinge support (34) is sleeved on the second screw rod segment (43) and matched with the thread of the second screw rod segment (43).

4. A tarpaulin support structure for a high-sided van as claimed in claim 3, wherein: The first hinge support (33) and the second hinge support (34) respectively comprise an outer sleeve (312) and an inner sleeve (311) mounted in the outer sleeve (312) and in rotational cooperation with the outer sleeve (312), the outer sleeve (312) is provided with an insertion plate (314) in sliding connection with the outer sleeve (312) in the radial direction, the outer side of the inner sleeve (311) is provided with an insertion hole (3111) in plug-in cooperation with the insertion plate (314) to limit the circumferential direction of the inner sleeve (311), the outer sleeve (312) is further provided with a sliding piece (313) in sliding connection with the outer sleeve (312) in the axial direction, the sliding piece (313) is provided with a first cooperation surface (315) cooperating with the insertion plate (314) to push the insertion plate (314) to move outwardly along the radial direction of the outer sleeve (312) during the process of the sliding piece (313) sliding forward relative to the outer sleeve (312) along the axial direction of the outer sleeve (312), so that the insertion plate (314) is disengaged from the insertion hole (3111), and is further provided with a second cooperation surface (316) cooperating with the insertion plate (314) to push the insertion plate (314) to move outwardly along the radial direction of the outer sleeve (312) during the process of the sliding piece (313) sliding backward relative to the outer sleeve (312) along the axial direction of the outer sleeve (312), so that the insertion plate (314) is disengaged from the insertion hole (3111), and the outer sleeve (312) is further provided with a reset spring (317) for resetting the sliding piece (313) and the insertion plate (314) inserted into the insertion hole (3111); The first hinge support (33) is in threaded cooperation with the first screw rod segment (42) through the inner sleeve (311) thereof, and the lower end of the first jacking rod (31) is hinged to the first hinge support (33) through the outer sleeve (312) of the first hinge support (33); The second hinge support (34) is in threaded cooperation with the second screw rod segment (43) through the inner sleeve (311) thereof, and the lower end of the second jacking rod (32) is hinged to the second hinge support (34) through the outer sleeve (312) of the second hinge support (34); The front side of the first hinge support (33) and the second hinge support (34) is respectively provided with a forward stroke limiting baffle (7) cooperating with the sliding piece (313) to push the sliding piece (313) to move backward, so that the insertion plate (314) is disengaged from the insertion hole (3111), and the rear side of the first hinge support (33) and the second hinge support (34) is respectively provided with a rear stroke limiting baffle (8) cooperating with the sliding piece (313) to push the sliding piece (313) to move forward, so that the insertion plate (314) is disengaged from the insertion hole (3111).

5. The lift van tarpaulin support structure of claim 1, wherein: The lifting control mechanism (4) comprises a winch (44) rotatably installed on the truck compartment (1), the winch (44) is provided with a first lifting control rope (45) connected with the first hinge support (33) and a second lifting control rope (46) connected with the second hinge support (34), and when the winch (44) rotates, the first lifting control rope (45) and the second lifting control rope (46) can be made to be synchronously lengthened or shortened by the winch (44).

6. A tarpaulin support structure for a high-sided van as claimed in claim 5, wherein: The truck compartment (1) is provided with a reset mechanism (5) for making the inclination angle of the first jacking rod (31) and the second jacking rod (32) with the vertical direction larger to make the tarpaulin support (2) descend and reset.

7. A tarpaulin support structure for a high-sided van as claimed in claim 6, wherein: The reset mechanism (5) is a spring with one end connected with the first jacking rod (31) and the other end connected with the second jacking rod (32).

8. The lift van tarpaulin support structure of claim 1, wherein: The front side of the first jacking rod (31) and the second jacking rod (32) is provided with a front limiting piece (11), and the rear side of the first jacking rod (31) and the second jacking rod (32) is provided with a rear limiting piece (12).

9. A lift van tarpaulin support structure as claimed in any one of claims 1 to 8, characterised in that: The jacking mechanism (3) is two, one of the jacking mechanisms (3) is installed above the front side plate of the truck compartment (1), and the other of the jacking mechanisms (3) is installed above the rear cross beam (13) of the truck compartment (1).

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