Cargo clamping device

Abstract

The utility model discloses a cargo clamping device. The cargo clamping device comprises a clamping platform, a stopping arm and an eccentric pressing block, the stopping arm is arranged on the clamping platform and can be controlled to linearly move in the horizontal direction, the eccentric pressing block is eccentrically and rotationally connected with the top of the stopping arm, and the rotating axis is perpendicular to the moving direction of the stopping arm and is in the horizontal direction. At least one groove is formed in the surface of the side facing the goods, and the groove extends to the surfaces of the two sides of the eccentric pressing block in the extending direction of the rotating axis. Continuous clamping force can be applied to goods in the goods transportation process through the eccentric pressing block, and the goods are prevented from loosening.

Description

Technical Field

[0001] The utility model relates to the technical field of cargo transportation, in particular to a cargo clamping device. Background Art

[0002] At present, commonly used clamping mechanisms include wedge clamping mechanisms, spiral clamping mechanisms and centering clamping mechanisms, and the main driving energy sources include manual, pneumatic, hydraulic and electric.

[0003] Among them, the clamping force of the manual mechanical clamping mechanism cannot be precisely controlled and the clamping force is limited, which restricts the usage scenarios. Moreover, when manually adjusting the clamping force mechanically, it is necessary to replace the pads or adjust the bolts. The operation is cumbersome and due to structural limitations, the positioning accuracy is relatively low.

[0004] Pneumatic and hydraulic clamping devices require dedicated actuation and hydraulic systems, increasing equipment cost and complexity. Furthermore, pneumatic and hydraulic systems require high sealing performance and require regular maintenance for proper and stable operation.

[0005] Existing electric clamping mechanisms are mainly designed for specific products or specific occasions and have a limited scope of use. Utility Model Content

[0006] The purpose of this utility model is to provide a cargo clamping device that can use an eccentric pressure block to apply a continuous clamping force to cargo during transportation to prevent the cargo from loosening. Furthermore, the cargo clamping device of this utility model can meet the requirements of clamping and securing cargo of different sizes and specifications.

[0007] The utility model provides a cargo clamping device, comprising:

[0008] Clamping platform;

[0009] The stop arm is arranged on the clamping platform and can be controlled to move linearly in the horizontal direction;

[0010] The eccentric pressure block is eccentrically connected to the top of the stop arm, and the rotation axis is perpendicular to the moving direction of the stop arm and is horizontal. At least one groove is provided on the side surface facing the cargo, and the groove extends to the two side surfaces of the eccentric pressure block along the extension direction of the rotation axis.

[0011] According to the cargo clamping device of the present invention, preferably, the clamping platform includes:

[0012] A base, the base being connected to a screw transmission shaft extending in a horizontal direction, and the base being provided with slideways on both sides in the horizontal direction; and

[0013] The slide is in driving connection with the screw transmission shaft. The slide is provided with a slide groove in sliding connection with the slideway, and the stop arm is connected to the slide so as to move linearly in the horizontal direction under the drive of the screw transmission shaft.

[0014] According to the cargo clamping device of the present invention, preferably, the slide seat includes:

[0015] A transmission seat, threadedly connected to the screw transmission shaft;

[0016] The slide is fixedly connected to the transmission seat, and the slide extends along the rotation axis direction of the eccentric pressure block. The slide groove is arranged at the bottom of the slide, and the slide is respectively provided with mounting seats at both ends along the rotation axis direction of the eccentric pressure block, and the stop arm and the eccentric pressure block are installed on each mounting seat.

[0017] According to the cargo clamping device of the present invention, preferably, the stop arm includes a first stop plate and a second stop plate that are arranged opposite to each other;

[0018] The bottoms of the first stop plate and the second stop plate are connected to the mounting seat, and first shaft holes are respectively provided at opposite positions of the tops of the first stop plate and the second stop plate;

[0019] The eccentric pressure block is embedded between the first stop plate and the second stop plate and is connected to the first shaft hole through a first rotating shaft.

[0020] According to the cargo clamping device of the present invention, preferably, a cover bin is provided on the base;

[0021] The bottoms of the first stop plate and the second stop plate are rotatably connected to the mounting seat, and the rotation angle is within a preset angle range so that the first stop plate and the second stop plate can be rotated to an angle to be accommodated in the cover bin.

[0022] According to the cargo clamping device of the present invention, preferably, a back plate is connected between the first stop plate and the second stop plate, the back plate is connected to an elastic reset member, and the other end of the elastic reset member is configured to be connected to the mounting seat;

[0023] The elastic return member is configured to return the first stop plate and the second stop plate to their original positions when they are removed from the cover bin.

[0024] According to the cargo clamping device of the present invention, preferably, a reset element storage groove for accommodating the elastic reset element is provided on the back plate.

[0025] According to the cargo clamping device of the present invention, preferably, a limiting boss is provided at the bottom of the back plate;

[0026] In which, a pad is provided on the mounting seat. When the bottom of the first stop plate and the second stop plate are assembled with the mounting seat, the pad is arranged on the side of the limiting boss facing away from the elastic return member to limit the rotation angle of the first stop plate and the second stop plate relative to the mounting seat.

[0027] According to the cargo clamping device of the present invention, preferably, the mounting seat is provided with a second axial hole, the bottom of the first stop plate and the second stop plate are provided with a third axial hole, and the second axial hole and the third axial hole are connected by a second rotating shaft;

[0028] Wherein, a limiting groove is provided on the slide at a position corresponding to the second shaft hole, and the first end of the second rotating shaft is embedded in the limiting groove;

[0029] A stop block is provided on the mounting seat, and an arched notch is provided at the first end of the second rotating shaft. The arched notch at the second end of the second rotating shaft abuts against the stop block to limit the rotation of the second rotating shaft relative to the second shaft hole, and to enable the first stop plate and the second stop plate to rotate relative to the second shaft hole.

[0030] According to the cargo clamping device of the present invention, preferably, it further includes:

[0031] A driving motor is connected to the screw transmission shaft.

[0032] The cargo clamping device of this utility model utilizes an eccentric pressure block to apply a continuous clamping force to cargo during transportation, preventing it from loosening. It can be used to clamp and secure cargo during transportation. Furthermore, according to the technical solution of this utility model, a drive motor is used to drive the slide relative to the base, thereby driving the movement of the stop arm and the eccentric pressure block, thereby applying the clamping force to the cargo. This device offers the advantages of fast clamping speed and clamping force feedback. Furthermore, when the drive motor is used in conjunction with a reducer, a continuous and constant clamping force output can be achieved, ensuring that the cargo remains clamped during transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a structural diagram of a cargo clamping device of the present utility model;

[0034] Figure 2 This is a schematic diagram of the installation of a cargo clamping device of the present invention after the drive motor is connected to a straight-through reducer;

[0035] Figure 3 yes Figure 2 AA section view in the figure;

[0036] Figure 4 yes Figure 2 BB section view in the figure;

[0037] Figure 5 This is a schematic diagram of the transmission connection structure between the base and the transmission seat of the utility model;

[0038] Figure 6 It is a structural diagram of the base of the utility model;

[0039] Figure 7 It is a structural diagram of the transmission seat of the utility model;

[0040] Figure 8 It is a structural schematic diagram of the slide of the utility model;

[0041] Figure 9 It is a structural schematic diagram of the stop arm of the utility model;

[0042] Figure 10 This is a schematic diagram of the clamping process of the cargo clamping device of the present invention;

[0043] Figure 11 This is a schematic diagram of the return-to-exit action of the stop arm of the utility model;

[0044] Figure 12 This is a schematic diagram of the cargo clamping device of the present invention used in groups.

[0045] The following are the descriptions of the reference numerals:

[0046] 100. Cargo clamping device;

[0047] 10. Clamping platform; 11. Base; 111. Slideway; 112. Screw shaft hole; 113. Base weight reduction hole; 114. Base slideway weight reduction hole; 12. Slide; 121. Drive seat; 1211. Threaded nut; 1212. Drive seat weight reduction groove; 122. Slide; 1221. Slideway; 1222. Pan head screw hole; 1223. Mounting seat; 1224. Slide weight reduction hole; 1225. Second shaft hole; 1226. Spring pin hole; 1227. Limiting groove; 1228. Spring over-position hole; 123. Wear strip; 124. Second rotating shaft; 125. Spacer; 126. Stopper; 13. Screw drive shaft; 14. Round nut; 15. Bushing; 16. Self-lubricating copper sleeve; 17. Thrust ball bearing; 18. Copper flange sleeve;

[0048] 20. Stop structure; 21. Stop arm; 211. First stop plate; 212. Second stop plate; 213. Back plate; 2131. Reset member storage tank; 214. First shaft hole; 215. Stop arm weight reduction groove; 216. Third shaft hole; 217. Limiting boss; 218. Spring shaft hole;

[0049] 22. Eccentric pressing block; 221. Connecting portion; 222. Eccentric pressing tooth portion; 23. Elastic reset member; 24. First rotating shaft;

[0050] 30. Driving motor; 31. Motor manual operation shaft;

[0051] 40. Reducer;

[0052] 200. Splined ball joint connecting shaft. DETAILED DESCRIPTION

[0053] The present invention will be further described below with reference to specific embodiments, but the protection scope of the present invention is not limited thereto.

[0054] Example 1

[0055] Figure 1 This is a structural diagram of a cargo clamping device of the present utility model; Figure 2 This is a schematic diagram of the installation of a cargo clamping device of the present invention after the drive motor is connected to a straight-through reducer; Figure 3 yes Figure 2 AA section view in the figure; Figure 4 yes Figure 2 BB section view in the figure; Figure 5 This is a schematic diagram of the transmission connection structure between the base and the transmission seat of the utility model; Figure 6 It is a structural schematic diagram of the base of the utility model; Figure 7 It is a structural diagram of the transmission seat of the utility model; Figure 8 It is a structural schematic diagram of the slide of the utility model; Figure 9 It is a schematic structural diagram of the stop arm 21 of the present utility model; Figure 10 This is a schematic diagram of the clamping process of the cargo clamping device of the present invention; Figure 11 It is a schematic diagram of the return-to-warehouse and exit-from-warehouse actions of the stop arm of the present invention.

[0056] like Figures 1 to 11 As shown, the cargo clamping device 100 of the present invention includes a clamping platform 10 and a stop structure 20 connected to the clamping platform 10. The stop structure 20 includes a stop arm 21 and an eccentric pressure block 22. The stop arm 21 is provided on the clamping platform 10 and can be controlled to move linearly in the horizontal direction. The eccentric pressure block 22 is eccentrically connected to the top of the stop arm 21. The rotation axis of the eccentric pressure block 22 is perpendicular to the moving direction of the stop arm 21 and is horizontal. At least one groove is provided on the side surface of the eccentric pressure block 22 facing the cargo, and the groove extends to the two side surfaces of the eccentric pressure block 22 along the extension direction of the rotation axis. Among them, the clamping platform 10 is configured as a mobile platform of the stop structure 20, and the stop structure 20 is used to apply vertical and lateral clamping force to the cargo to fix the cargo.

[0057] Since the center of gravity of the eccentric pressing block 22 does not intersect with the axis of rotation of the eccentric pressing block 22, the eccentric pressing block 22 can keep the groove facing the cargo. As the eccentric pressing block 22 is controlled to move toward the cargo, the groove of the eccentric pressing block 22 contacts the edge of the bottom of the cargo. If the eccentric pressing block 22 continues to move toward the cargo, the eccentric pressing block 22 will be forced to rotate (to Figure 4 For example, the eccentric pressing block 22 rotates clockwise), so that the eccentric pressing block 22 provides vertical downward pressure on the edge of the cargo and a horizontal thrust in the same direction as the moving direction of the eccentric pressing block 22, thereby securing the cargo.

[0058] In this embodiment, if Figure 1 、 Figure 6 and Figure 8 As shown, the clamping platform 10 includes a base 11 and a slide 12. The base 11 is connected to a screw drive shaft 13 extending in a horizontal direction. The base 11 is provided with slides 111 on both sides along the horizontal direction. The slide 12 is transmission-connected to the screw drive shaft 13. A slide groove 1221 is provided on the slide 12 that is slidingly connected to the slide 111, and the stop arm 21 is connected to the slide 12.

[0059] The screw drive shaft 13 drives the slide 12 to move linearly relative to the base 11 , and the slide 12 further drives the stop arm 21 to move linearly.

[0060] Alternatively, as Figure 6 As shown, the base 11 is a hollow frame structure, with screw shaft holes 112 provided on the front and rear side walls of the base 11, and a V-shaped slide 111 with a V-shaped cross section provided on each of the left and right side walls of the base 11. The tip of any V-shaped slide 111 points to the other V-shaped slide 111.

[0061] like Figures 4 to 6 As shown, the screw transmission shaft 13 is inserted into the screw shaft hole 112 , and a shaft shoulder is provided at the first end of the screw transmission shaft 13 , which is used in conjunction with the flange copper sleeve 18 provided in the screw shaft hole 112 to limit the screw transmission shaft 13 .

[0062] refer to Figure 4 The second end of the screw drive shaft 13 is provided with a fastening thread, which cooperates with the round nut 14 and the washer 15 to achieve the compression and positioning of the thrust ball bearing 17. The copper sleeve used here is a self-lubricating copper sleeve 16, which can smoothly achieve the lubricated rotation of the screw drive shaft 13. The self-lubricating copper sleeve 16, the thrust ball bearing 17, the washer 15, and the round nut 14 are arranged in sequence along the direction from the first end of the screw drive shaft 13 to the second end, and all surround the screw drive shaft 13. The outer rings of the self-lubricating copper sleeve 16 and the thrust ball bearing 17 are fixed in the screw shaft hole 112 of the base 11, and the inner ring of the thrust ball bearing 17 is connected to the screw drive shaft 13.

[0063] A transmission thread structure is provided in the middle of the screw drive shaft 13. The slide 12 is connected to the screw drive shaft 13 and is slidably connected relative to the slideway 111. The forward and reverse rotational motion of the screw drive shaft 13 can be converted into reciprocating movement of the slide 12 in the horizontal direction.

[0064] like Figure 1 and Figure 2 As shown, the first end of the screw drive shaft 13 is connected to the drive motor 30, which drives the forward and reverse rotation of the screw drive shaft 13. Optionally, the drive motor 30 includes a motor output shaft, a motor power supply interface, and a motor signal interface. The motor output shaft is in driving connection with the first end of the screw drive shaft 13, and the motor power supply interface and motor signal interface are respectively connected to the power supply and the controller of the cargo clamping device 100.

[0065] Optionally, the drive motor 30 is provided with a brake device, and a standard rotary transformer is used as a position feedback element of the drive motor 30 to accurately control the moving position of the slide 12. The utility model adopts an electronically controlled drive form, has a fast clamping speed, and has a clamping force feedback capability.

[0066] It should be pointed out here that if Figure 2 As shown, the drive motor 30 further includes a motor manual operating shaft 31. When there is no power input, the motor manual operating shaft 31 at the rear of the drive motor 30 can be operated by a handheld tool to perform tightening and releasing operations.

[0067] Furthermore, a keyway is provided at the first end of the screw drive shaft 13, and a reducer 40 can be connected between the screw drive shaft 13 and the drive motor 30 to achieve continuous and constant clamping force output, ensuring that the goods are in a continuous clamping state during transportation.

[0068] Optionally, the reducer 40 adopts a spiral bevel gear structure reducer or a straight-through planetary reducer commonly used in the art, Figure 1 and Figure 2 As shown. Among them, the spiral bevel gear structure reducer can realize multi-angle bending transmission and is suitable for use in limited space layout in many occasions. However, it should be pointed out that the reducer 40 is not limited to the above-mentioned reducer form.

[0069] In this embodiment, reference Figure 6 Base weight-reducing holes 113 can be provided on the front and rear side walls of the base 11, and base slide weight-reducing holes 114 can be provided on the slides 111 on the left and right side walls of the base 11, so as to ensure the structural strength while reducing the overall weight of the equipment.

[0070] Reference Figure 1 、 Figure 3 and Figure 8The slide 12 includes a transmission base 121 and a slide 122. The transmission base 121 is threadedly connected to the screw drive shaft 13, and the slide 122 is fixedly connected to the transmission base 121. The slide 122 is located above the transmission base 121 and extends along the rotation axis of the eccentric pressure block 22. A slide groove 1221 is provided at the bottom of the slide 122. Mounting seats 1223 for connecting to the stop structure 20 are provided at both ends of the slide 122 along the rotation axis of the eccentric pressure block 22. In other words, each mounting seat 1223 is mounted with a stop arm 21 and an eccentric pressure block 22, which can improve the balance of force applied to the cargo and prevent it from tipping over.

[0071] In this embodiment, if Figure 7 As shown, the transmission seat 121 has a threaded nut 1211, which is used in conjunction with the screw drive shaft 13 to realize threaded transmission. The corresponding positions of the transmission seat 121 and the slide 122 are provided with bolt mounting holes, and the two are fixedly connected by tightening bolts. This connection method is convenient for device maintenance. Optionally, a transmission seat weight reduction groove 1212 is also provided on the transmission seat 121, which can ensure the structural strength while reducing the overall weight of the equipment. Figure 1 and Figure 7 In this embodiment, the transmission seat weight reduction groove 1212 is provided on the surface of the transmission seat 121 facing the slide 122 .

[0072] refer to Figure 1 、 Figure 6 and Figure 8 The slide groove 1221 is set at the bottom of the slide platform 122, and the width of the slide groove 1221 is adapted to the width of the slideway 111 on the base 11.

[0073] Preferably, wear strip pan head screw holes 1222 are provided at both ends of the horizontal direction of the chute 1221. After the wear strip 123 is installed on the side of the chute 1221 that contacts the slideway, the wear strip 123 is fixed with the wear strip pan head screws to prevent it from falling off. The wear strip 123 can be in the shape of a thin strip structure and should be large enough to cover the side of the chute 1221 that contacts the slideway 111.

[0074] The slide 122 may also be provided with slide weight reduction holes 1224 , so as to ensure the structural strength while reducing the overall weight of the equipment.

[0075] like Figure 3As shown, in this embodiment, the eccentric pressure block 22 includes a connecting portion 221 and an eccentric tooth-pressing portion 222. The connecting portion 221 is rotatably connected to the top of the stop arm 21, and at least one groove forms the eccentric tooth-pressing portion 222. Optionally, the connecting portion 221 has a semi-wheel-shaped structure, and the eccentric tooth-pressing portion 222 comprises a plurality of grooves integrally formed around the circumference of the semi-wheel-shaped structure. It is understood that the grooves have protrusions and recesses, and the number and width of the grooves can be set according to actual needs and are not limited herein.

[0076] refer to Figure 3 and Figure 9 The stop arm 21 includes a first stop plate 211 and a second stop plate 212 disposed opposite each other. The bottoms of the first stop plate 211 and the second stop plate 212 are connected to the mounting seat 1223. First shaft holes 214 are respectively provided at opposing tops of the first stop plate 211 and the second stop plate 212. The connecting portion 221 of the eccentric pressure block 22 is embedded between the first stop plate 211 and the second stop plate 212 and is rotationally connected to the first shaft hole 214 via the first rotating shaft 24. The utility model arranges the eccentric pressure block 22 between the first stop plate 211 and the second stop plate 212, thereby improving the stability of the eccentric pressure block 22 during rotation.

[0077] It should be noted that when the eccentric pressure block 22 is in a balanced state, the eccentric force causes the center of gravity of the eccentric pressure block 22 to be aligned with the center point of the first rotating shaft 24. In other words, the center of gravity of the eccentric pressure block 22 is directly below the first rotating shaft 24, and the opening of the groove provided in the eccentric pressure block 22 faces the direction of the cargo. When the eccentric pressure block 22 is subjected to an external force and is in an unbalanced state, it rotates in the space between the first stop plate 211 and the second stop plate 212. At this point, the center of gravity of the eccentric pressure block 22 deviates from being directly below the first rotating shaft 24, and the eccentric force exerts a tendency for the eccentric pressure block 22 to return to a balanced state.

[0078] In this embodiment, the connecting portion 221 of the eccentric pressure block 22 is detachably connected to the first stop plate 211 and the second stop plate 212 through the first rotating shaft 24. Therefore, when the size specifications or type of goods change, the shape and size of the eccentric pressure block 22 can be replaced according to the actual needs of the goods to ensure that the eccentric pressure block 22 can apply sufficient clamping force to the goods.

[0079] Optionally, refer to Figure 9 The first stop plate 211 and the second stop plate 212 are provided with a stop arm weight reduction groove 215, which can reduce the deadweight of the stop arm 21. However, it should be noted that the size and shape of the stop arm weight reduction groove 215 should ensure that the stop arm 21 has sufficient strength to support the deflection pressure block 22.

[0080] In some embodiments, a cover bin (not shown) is provided at one end of the base 11 close to the drive motor 30 , and the top of the cover bin is slightly higher than the height of the stop structure 20 when it is in a substantially horizontal state.

[0081] The bottoms of the first stop plate 211 and the second stop plate 212 are rotatably connected to the mounting base 1223 at a preset rotation angle, so that the first stop plate 211 and the second stop plate 212 can be rotated to an angle to be accommodated in the cover compartment.

[0082] Continue to refer to Figure 9 and Figure 3 A back plate 213 is connected between the first stop plate 211 and the second stop plate 212. The back plate 213 is connected to an elastic return member 23. The other end of the elastic return member 23 is connected to the mounting seat 1223 of the slide 122. The elastic return member 23 is configured to return the first stop plate 211 and the second stop plate 212 to their original position when they are removed from the cover bin.

[0083] As an example, the elastic return member 23 is a return spring, and a spring shaft hole 218 is provided on the first stop plate 211 and the second stop plate 212. One end of the return spring is connected to the spring shaft hole 218 through a rotating shaft, and the other end is connected to the spring pin hole 1226 provided on the mounting seat 1223 of the slide 122 through a rotating shaft.

[0084] Optionally, a reset element storage groove 2131 for accommodating the elastic reset element 23 is provided on the back plate 213 .

[0085] It should be noted that, to facilitate portability of the cargo clamping device 100, when the cargo clamping device 100 is not in use, the stop structure 20 can be rotated to a position substantially parallel to the slide 122 and the base 11 to reduce its occupied space. When the cargo clamping device 100 is needed, the stop structure 20 is rotated to a position substantially perpendicular to the slide 122 under the action of the return spring.

[0086] For example, when the cargo clamping device 100 is not in use, the drive motor 30 drives the screw transmission shaft 13 to rotate, so that the slide 12 drives the stop structure 20 to continuously slide in the direction close to the cover. When the stop structure 20 contacts the cover, under the push of the cover, the stop structure 20 rotates to a position substantially parallel to the slide 122 and the base 11. Figure 11 The stop structure 20 is depicted by the double-dot chain line. At this time, the stop structure 20 is recovered in the accommodating space of the cover bin, and the elastic reset member 23 is in a stretched state, and the elastic reset member 23 is located in the reset member storage groove 2131.

[0087] When the cargo clamping device 100 is in use, the drive motor 30 drives the screw transmission shaft 13 to rotate in the opposite direction, so that the slide 12 drives the stop structure 20 to slide continuously in the direction away from the cover. When the stop structure 20 is out of the cover, under the action of the rebound force of the elastic reset member 23, the stop structure 20 rotates to a position substantially perpendicular to the slide 122 and the base 11. Figure 11 The stop structure 20 is depicted in solid lines.

[0088] In this embodiment, referring to Figure 1 、 Figure 8 and Figure 9 Each mounting seat 1223 is provided with a second axial hole 1225, and the bottom of the first stop plate 211 and the second stop plate 212 of each stop arm 21 is provided with a third axial hole 216, and the second axial hole 1225 and the third axial hole 216 are connected by the second rotating shaft 124; wherein, the two ends of the slide 122 are respectively provided with limiting grooves 1227 at positions corresponding to the second axial hole 1225, and the opening of the limiting groove 1227 faces the second rotating shaft 124, and the first end (inner end) of each second rotating shaft 124 is embedded in the limiting groove 1227, which is used to limit the movement of the second rotating shaft 124 in the axial direction to prevent the second rotating shaft 124 from slipping. Figure 1 and Figure 8 In the illustrated embodiment, the limiting groove 1227 also extends upward to the top surface of the slide 122 .

[0089] Each mounting seat 1223 is provided with a stopper 126. The second end (outer end) of each second rotating shaft 124 is provided with an arcuate notch (the remaining portion is approximately C-shaped). This arcuate notch abuts against the stopper 126, limiting the rotation of the second rotating shaft 124 relative to the second shaft hole 1225. This allows the first stopper plate 211 and the second stopper plate 212 of the stopper arm 21 to rotate relative to the second rotating shaft 124. In other words, the second rotating shaft 124 cannot rotate on its own, and the stopper arm 21 rotates around the second rotating shaft 124.

[0090] Optionally, the stopper 126 is mounted on the outside of the side plate of the mounting seat 1223 by screws and is close to the position of the second shaft hole 1225. The length of the arcuate notch in the axial direction can be matched with the thickness of the stopper 126.

[0091] It should be pointed out that the bottom of the stop arm 21 is detachably connected to the mounting seat 1223 through the second rotating shaft 124. When the size specifications or type of goods change, the specifications of the stop arm 21 can be replaced according to the actual needs of the goods to ensure that the eccentric pressure block 22 can apply sufficient lateral and vertical clamping force to the goods.

[0092] Specifically, remove the stopper 126 , take out the second rotating shaft 124 , and then remove the stopping arm 21 .

[0093] Optionally, refer to Figure 8 A spring passing hole 1228 is also provided on the rear side plate of the mounting seat 1223 at a position matching the reset spring, so as to avoid the reset spring when the stop arm 21 rotates to the rear side of the mounting seat 1223.

[0094] In this embodiment, referring to Figure 3 Combined with Figure 9 A pad 125 is provided in the mounting seat 1223, and a limiting boss 217 is provided on the bottom of the back plate 213. After the stop structure 20 is installed in the mounting seat 1223, the pad 125 is placed on the side of the limiting boss 217 facing away from the elastic return member 23 to prevent the stop arm 21 from rotating to a position where it cannot hold the cargo due to the rebound force of the elastic return member 23.

[0095] Optionally, the pad 125 is made of polymer material. Since the repeated friction between the pad 125 and the limiting boss 217 easily causes wear of the pad 125, the overall cost of the equipment can be reduced by making the pad 125 of polymer material.

[0096] In this embodiment, reference Figure 3 and Figure 8 To prevent the stop arm 21 from rotating relative to the mounting base 1223, the front side of the mounting base 1223 is not provided with a side panel. The bottom plate of the mounting base 1223 is provided with a clearance opening for the position-limiting boss 217. The spacer 125 is mounted on the rear side of the bottom plate of the mounting base 1223 using screws. When the stop arm 21 and the mounting base 1223 are assembled, the spacer 125 is placed on the side of the position-limiting boss 217 facing away from the elastic return member 23.

[0097] It should be noted that the shape and size of the pad 125 should match the shape and size of the limiting boss 217 .

[0098] The stop structure 20 of the cargo clamping device 100 of the present invention can be used to clamp and fix cargo during transportation or storage, especially for clamping and fixing cargo of different sizes and types.

[0099] Furthermore, the present invention reduces weight by optimizing its structure, ensuring the device's strength and impact resistance while effectively reducing its own weight, making it easier to carry and install. Furthermore, the device is reusable and easy to maintain.

[0100] The following describes the working process of the cargo clamping device 100 in detail by taking the clamping and fixing of the cargo base as an example:

[0101] It should be noted that the height of the cargo base is substantially flush with the lowest groove on the eccentric pressing block 22 .

[0102] When the cargo clamping device 100 is used, after the cargo is transferred to the right position, the driving motor 30 drives the reducer 40 to drive the screw transmission shaft 13 to rotate in the first direction, and the screw transmission shaft 13 drives the transmission seat 121 and the slide 122 to move horizontally relative to the base 11 to align and clamp the cargo base. Figure 10 The slide 12 and stop structure 20 are depicted by the double-dashed lines. During movement, the protruding portion of the groove on the eccentric pressure block 22 first contacts the sidewall of the cargo base. As the screw drive shaft 13 drives the drive base 121 further toward the cargo, the eccentric pressure block 22, mounted on the stop arm 21, rotates counterclockwise about the first rotation axis 24 under the abutting force of the cargo base. The concave portion of the groove on the eccentric pressure block 22 contacts the upper surface of the cargo base. At this point, the eccentric pressure block 22 is out of equilibrium, meaning its center of gravity deviates from directly below the first rotation axis 24 and is not aligned with the center of the first rotation axis 24. Because the eccentric pressure block 22 tends to return to equilibrium under its own eccentric force, i.e., it tends to rotate clockwise about the first rotation axis 24, it can apply vertical and lateral forces to the cargo base, clamping it securely and completing the clamping operation.

[0103] It should be pointed out that during the operation of the drive motor 30, the controller of the cargo clamping device 100 can determine that the transmission seat 121 and the slide 122 are moved to the appropriate position based on the position information fed back from the position feedback element of the drive motor 30, thereby adjusting the speed of the drive motor 30 to achieve continuous and constant clamping force output, ensuring that the cargo is in a continuous clamping state during transportation.

[0104] When the cargo needs to be unloaded, the driving motor 30 drives the screw transmission shaft 13 to rotate in the second direction, which is opposite to the first direction, so that the transmission seat 121 and the slide 122 slide in the opposite direction relative to the base 11 in the horizontal direction. Figure 10 The solid lines depict the slide 12 and stop structure 20. This releases the cargo, providing space for unloading and completing the untying process. At this point, since the eccentric pressure block 22 is not in contact with the cargo base, it is not affected by external forces and returns to equilibrium under the action of its own eccentric force.

[0105] Example 2

[0106] The cargo clamping device 100 of the present invention can be used in groups to fix cargo, can achieve stepless adjustment with a large stroke, and can adapt to the clamping and fixing needs of cargo of various sizes and types.

[0107] Figure 12This is a schematic diagram of the cargo clamping device 100 of the present invention being used in groups.

[0108] like Figure 12 As shown, in this embodiment, the second ends of the screw drive shafts 13 of the two sets of cargo clamping devices 100 are provided with keyways, and the two screw drive shafts 13 are connected and transmitted via a spline ball cage connecting shaft 200. In this way, a single drive motor 30 can be used to synchronously drive the slides 12 to move toward each other, thereby centering and clamping the cargo.

[0109] It should be noted that the thread structures of the screw transmission shafts 13 and the threaded nuts 1211 of the transmission base 121 of the two sets of cargo clamping devices 100 have opposite rotation directions.

[0110] The present invention is not limited to the above-mentioned embodiments. Without departing from the essential content of the present invention, any deformation, improvement, and substitution that can be thought of by those skilled in the art shall fall within the scope of the present invention.

Claims

1. A cargo clamping device, characterized in that: include: Clamping platform; A stop arm, provided on the clamping platform, capable of controlled linear movement in a horizontal direction; An eccentric pressure block is eccentrically connected to the top of the stop arm in a rotational manner, and the rotation axis is perpendicular to the moving direction of the stop arm and is horizontal. At least one groove is provided on the side surface facing the cargo, and the groove extends to the two side surfaces of the eccentric pressure block along the extension direction of the rotation axis.

2. The cargo clamping device according to claim 1, characterized in that: The clamping platform comprises: A base, the base being connected to a screw transmission shaft extending in a horizontal direction, and the base being provided with slideways on both sides in the horizontal direction; and The slide is in driving connection with the screw transmission shaft. The slide is provided with a slide groove in sliding connection with the slideway, and the stop arm is connected to the slide so as to move linearly in the horizontal direction under the drive of the screw transmission shaft.

3. The cargo clamping device according to claim 2, characterized in that: The slide comprises: A transmission seat, threadedly connected to the screw transmission shaft; The slide is fixedly connected to the transmission seat, and the slide extends along the rotation axis direction of the eccentric pressure block. The slide groove is arranged at the bottom of the slide, and the slide is respectively provided with mounting seats at both ends along the rotation axis direction of the eccentric pressure block, and the stop arm and the eccentric pressure block are installed on each mounting seat.

4. The cargo clamping device according to claim 3, characterized in that: The stop arm includes a first stop plate and a second stop plate that are arranged opposite to each other; The bottoms of the first stop plate and the second stop plate are connected to the mounting seat, and first shaft holes are respectively provided at opposite positions of the tops of the first stop plate and the second stop plate; The eccentric pressure block is embedded between the first stop plate and the second stop plate and is connected to the first shaft hole through a first rotating shaft.

5. The cargo clamping device according to claim 4, characterized in that: A cover bin is provided on the base; The bottoms of the first stop plate and the second stop plate are rotatably connected to the mounting seat, and the rotation angle is within a preset angle range so that the first stop plate and the second stop plate can be rotated to an angle to be accommodated in the cover bin.

6. The cargo clamping device according to claim 5, characterized in that: A back plate is connected between the first stop plate and the second stop plate, the back plate is connected to an elastic reset member, and the other end of the elastic reset member is configured to be connected to the mounting seat; The elastic return member is configured to return the first stop plate and the second stop plate to their original positions when they are removed from the cover bin.

7. The cargo clamping device according to claim 6, characterized in that: The back plate is provided with a reset element storage groove for accommodating the elastic reset element.

8. The cargo clamping device according to claim 6, characterized in that: A limiting boss is provided at the bottom of the back plate; In which, a pad is provided on the mounting seat. When the bottom of the first stop plate and the second stop plate are assembled with the mounting seat, the pad is arranged on the side of the limiting boss facing away from the elastic return member to limit the rotation angle of the first stop plate and the second stop plate relative to the mounting seat.

9. The cargo clamping device according to claim 5, characterized in that: The mounting seat is provided with a second axial hole, the bottom of the first stop plate and the second stop plate are provided with a third axial hole, and the second axial hole and the third axial hole are connected by a second rotating shaft; Wherein, a limiting groove is provided on the slide at a position corresponding to the second shaft hole, and the first end of the second rotating shaft is embedded in the limiting groove; A stop block is provided on the mounting seat, and an arched notch is provided at the second end of the second rotating shaft. The arched notch at the second end of the second rotating shaft abuts against the stop block to limit the rotation of the second rotating shaft relative to the second shaft hole, and to enable the first stop plate and the second stop plate to rotate relative to the second shaft hole.

10. The cargo clamping device according to any one of claims 2 to 8, characterized in that: Also includes: A driving motor is connected to the screw transmission shaft.

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