Lifting platform with track structure

Abstract

The present invention relates to the field of lifting devices, and specifically to a lifting platform with a track structure, including a slide matched with a support platform, a screw transmission assembly driving the slide to move relative to the support platform, a plurality of sensor monitoring units, and a control unit. The plurality of sensor monitoring units are arranged on the slide relatively to the left and right and are connected to the control unit. The sensor monitoring unit is arranged in a groove portion on the slide. A cover plate is provided corresponding to each groove portion, and the upper end surface of the cover plate is flush with the upper end surface of the slide. The upper end surface of the slider of the sensor monitoring unit at least partially protrudes from a strip through hole provided on the cover plate. The slider can slide in the left and right directions relative to the cover plate, and when the slider moves relative to the cover plate, it can trigger a sensor body to generate a sensor signal. The control unit can receive and process the sensor signal transmitted by the sensor body in real time, and generate corresponding instructions to control the screw transmission assembly to respond. The present invention can effectively suppress the lateral deviation of a scissor-type lifting platform.

Description

Technical Field

[0001] The invention relates to the technical field of lifting devices, and in particular to a lifting platform with a track structure. Background Art

[0002] The scissor-type lifting platform is a cargo lifting equipment with good lifting stability and a wide range of applications. It is mainly used for lifting workers and equipment in aerial operations, transporting cargo between height differences on production lines, loading and unloading materials, feeding materials from high-altitude feeders, lifting during assembly of large equipment, and quick loading and unloading of cargo in warehousing and loading and unloading places in conjunction with forklifts and other handling vehicles.

[0003] In certain lifting operations that need to bear heavy loads, the scissor arms of a scissor-type lift platform often need to bear great pressure. At this time, if the placement of the cargo on the support surface of the lift platform is relatively biased to one side, that is, there is a phenomenon of cargo overloading, then the degree of pressure on the scissor arms on both sides of the vertical plane where the scissor arm pivot is located will be quite different, which can easily cause the support surface to deflect to one side relative to the horizontal plane, that is, it can easily cause the support surface to deflect to the side. Moreover, the more layers of the scissor arm hinge setting of the lift platform, that is, the higher the lifting height of the scissor-type lift platform, the more significant the degree of deflection / lateral deviation of the support platform caused by the aforementioned situation, and the greater the possibility of cargo falling from a height.

[0004] In addition, allowing the scissor-type lift platform to operate and remain fixed in a state of severe lateral deviation will adversely aggravate the stress conditions of the mechanical components of the scissor arm unit, such as the scissor arm and the pivot of the scissor arm, and will easily cause the mechanical stability and reliability of the lift platform to deteriorate sharply after long-term use, and will in turn further accelerate the deterioration of the mechanical properties of the scissor arm unit, making the degree of lateral deviation of the support platform at the previous and subsequent time points under the same cargo overload condition relatively greater, making it relatively more likely to deviate, causing an accident. Summary of the invention

[0005] In order to overcome the problem of lateral deviation of the supporting platform caused by a relatively large degree of eccentric loading at the cargo placement position, the present invention provides a lifting platform with a track structure, which can effectively suppress the lateral deviation of the scissors-type lifting platform and help improve the stress condition of the mechanical structure of the scissors-type lifting platform during operation.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a lifting platform with a track structure, including a scissor arm unit fixed on a vehicle body, a supporting platform matched with the upper end of the scissor arm of the scissor arm unit, a slide matched with the supporting platform through a slide rail structure arranged along the left and right directions, a screw transmission assembly capable of driving the slide to move relative to the supporting platform along the left and right directions, a plurality of sensor monitoring units distributed on the slide, and a control unit.

[0007] A plurality of cylindrical protrusions may be distributed on the upper end surface of the support platform and / or on the lower end surface of the slide, and the curved surface of the cylindrical protrusions may be in tangential contact with the upper end surface of the support platform or the lower end surface of the slide, and a line-surface contact matching relationship may be formed between the opposing surfaces of the two. The plurality of cylindrical protrusions may be distributed alternately in the front-to-back direction, and the cylindrical protrusions may cross the upper end surface of the support platform and the lower end surface of the slide in the left-to-right direction. When the upper end surface of the support platform and the lower end surface of the slide are both provided with cylindrical protrusions, the cylindrical protrusions on the two may be arranged alternately and interspersed. By providing the cylindrical protrusions, support may be established between the opposing surfaces of the support platform and the slide, while the frictional resistance during relative movement between the two may be relatively reduced.

[0008] The drive motor of the lead screw transmission assembly is fixed on the left end surface of the support platform, and matches with the protrusion formed on the lower end surface of the slide and extending downward into the track groove formed on the upper end surface of the support platform, and the lead screw lever is arranged along the left and right directions. When the drive motor drives the lead screw lever to rotate, it can drive the protrusion to drive the slide body to move along the left and right directions relative to the support platform.

[0009] A plurality of sensor monitoring units are arranged on the slide seat opposite to each other and are respectively connected to the control unit. The number of the sensor monitoring units is at least two, and preferably an even number.

[0010] A groove portion is formed on the upper end surface of the slide seat and matches the sensor monitoring unit in a one-to-one correspondence.

[0011] The profile groove portion includes a profile groove 1 and a profile groove 2 formed on the bottom surface of the profile groove 1. A cover plate is matched with each profile groove portion and fixedly sealed at the upper end of the profile groove portion that matches the profile groove portion, so that the upper end surface of the cover plate is flush with the upper end surface of the slide seat, that is, the two upper end surfaces can be in the same plane.

[0012] The sensor monitoring unit comprises a slider, a rod part 1 fixed on one end surface of the slider, a sensor body, a rod part 2 fixed on the other end surface of the slider, and a reset driving part.

[0013] The slider is arranged in the second groove and matches the second groove through a slide rail structure arranged along the left and right directions, so that the slider can move along the left and right directions relative to the second groove. It can be seen that the left and right extension length of the second groove is greater than the left and right extension length of the slider.

[0014] A strip through hole is formed on the cover plate at a position corresponding to the position directly above the second profile groove, so that the upper end surface of the elastic protrusion layer fixedly arranged on the upper part of the slider can pass through the strip through hole and extend outward relative to the upper end surface of the cover plate. The strip through hole extends in the left-right direction, and in the process of the slider moving relative to the second profile groove, the left and right ends of the strip through hole can always maintain a corresponding spacing with the left and right ends of the slider.

[0015] The free end of the rod part 1 is fixedly provided with the detection arm part, so that the detection arm part extends into the groove 1 and matches with the sensor body fixed in the groove 1. When the slider moves relative to the groove 2, the detection arm part can trigger the sensor body to generate a sensing signal.

[0016] One end of the reset driving part is fixed in the groove 1, and the other end can be inserted into the groove 2 and matched with the free end of the rod 2. The reset driving part can apply elastic tension in the left and right directions and / or selectively generate magnetic attraction on the rod 2, and after the slider moves toward the side close to the sensor body and the goods placed on the slide seat are removed, that is, when the goods are no longer pressed on the slider, the slider can be driven to move in the opposite direction by means of the elastic tension and / or magnetic attraction generated by the reset driving part, so as to complete the reset of the slider.

[0017] The control unit can receive and process the sensor signals transmitted by each sensor body in real time, and generate corresponding instructions to control the screw transmission assembly to make corresponding response actions, that is, to remain stationary, drive the slide to move a certain stroke to the left or right relative to the support platform, etc.

[0018] When the control unit detects that the sensor signal transmitted by the sensor body of at least one sensor monitoring unit is abnormal, it sends an action command to the screw transmission assembly to drive the slide to move a certain amount of travel to the left or right relative to the support platform.

[0019] Optionally, an annular axial flange 1 is formed in the middle of the end surface of the slider. A first spring is fixedly sleeved on the axial flange 1. A threaded hole is formed on the inner bottom surface of the axial flange 1. One end of the rod 1 can match the threaded hole after passing through the first spring, so that the rod 1 and the slider are fixedly connected as a whole. After assembly, a left-right spacing is formed between the free end of the first spring and the inner end surface of the groove 2, so that the left-right spacing is within the range of 10 mm, preferably within the range of 2 mm to 5 mm.

[0020] When the slider moves relative to the groove 2, the free end of the first spring can contact the inner end surface of the groove 2. By adjusting the matching length between the rod 1 and the threaded hole, the initial matching state / position between the detection arm and the sensor body can be adjusted.

[0021] Optionally, the second rod portion and the slider are matched via a threaded structure.

[0022] The reset driving part includes a cylinder and a pair of arms, the two arms are fixedly arranged on the front side and the rear side of the cylinder, and the free ends of the arms extend outwardly in the axial direction relative to the port side of the cylinder. The cylinder extends into the second groove. A through hole is formed on the inner bottom surface of the cylinder for the second rod to pass through, and a second annular axial flange is formed on the periphery of the through hole. A second spring is fixedly sleeved on the second axial flange.

[0023] A radial edge arm is formed on the second rod portion, and the outer diameter of the radial edge arm is not greater than the inner diameter of the cylinder, and is greater than the outer diameter of the second spring. The axial distance between the free end of the second spring and the cylinder port is not less than the axial distance between the inner end surface of the radial edge arm and the cylinder port, that is, the radial edge arm is closer to the cylinder cavity port of the cylinder than the free end of the second spring.

[0024] After assembly, the free end side of the arm can match the cover plate and / or the first groove, so that the reset drive part and the first groove establish a fixed matching relationship, so that the cylinder is fixedly suspended on the upper part of the port of the second groove. A left-right spacing is formed between the opposite surfaces of the cylinder and the slider. When the slider moves relative to the second groove, the spacing between the opposite surfaces of the cylinder and the slider can change.

[0025] The free end of the second rod portion can extend above the inner bottom surface of the first profile groove, and the outer peripheral surface of the second rod portion can contact the inner bottom surface of the first profile groove or form a vertical spacing relative to the inner bottom surface of the first profile groove.

[0026] Optionally, in the initial state, a left-right spacing is formed between the radial edge arm and the second spring, and the left-right spacing is smaller than a left-right spacing between the first spring and the second inner end surface of the profile groove.

[0027] An electromagnet is fixed on one side of the reset driving part which is fixed in the groove, and the electromagnet is connected to the control unit.

[0028] The control unit can selectively switch the electromagnet between the energized state and the de-energized state according to the change of the sensor signal.

[0029] The free end of the second rod extends into the first groove and is fixed with an iron block. In the initial state, the electromagnet contacts the opposite surface of the iron block. The slider moves toward the side of the sensor body, and a gap is generated between the opposite surface of the electromagnet and the iron block. When the electromagnet is switched to the power-on state, a magnetic attraction force in the left and right direction can be applied to the second rod to drive the slider to move in the opposite direction to complete the reset.

[0030] Optionally, a plurality of protrusions are formed on the opposite surfaces of the two arm bodies. The plurality of protrusions on each arm body are arranged alternately on the left and right. An edge plate extending downward is formed on the lower end surface of the protrusion. Correspondingly, a plurality of protrusion blocks are formed on the cover plate, and slots that can be matched with each edge plate are formed on the inner bottom surface of the groove 1.

[0031] After the cover plate is fixedly sealed on the upper port of the groove portion, the protrusion block can be inserted between two adjacent protrusions, and / or the two adjacent protrusion blocks can sandwich the protrusion, and the cover plate can exert downward pressure on the arm body.

[0032] Optionally, the end surface of the elastic protrusion layer passing through the strip-shaped through hole is a serrated surface, and the serrations are distributed along the left-right direction.

[0033] Optionally, the sensor body is a grating sensor, and the moving grating of the grating sensor is fixed to the free end of the detection arm. A groove extending or penetrating in the left-right direction is formed on the body of the grating sensor, and the free end of the detection arm can extend into the groove. The fixed grating of the grating sensor is fixed on the bottom surface or side surface of the groove.

[0034] In order to suppress the adverse conditions caused by the cantilever effect on the detection arm, a support track matching the detection arm can be set on the groove to enable the detection arm to move in the left and right directions in a plane relatively parallel to the upper end surface of the slide, and to ensure that the moving grating it carries is stably matched with the fixed grating.

[0035] Optionally, a buffer body is fixedly arranged at the free end of the second rod portion. In the initial state, the free end surface of the buffer body is in contact with the inner wall of the innermost protruding block or the second profile groove.

[0036] Optionally, one end of the reset drive unit is fixed in the first groove, and the other end is inserted into the second groove and fixed with an electromagnet, so that the electromagnet is connected to the control unit. The control unit can selectively switch the electromagnet between the power-on and power-off states.

[0037] An iron block is fixed at the free end of the second rod. In the initial state, the opposite surfaces of the electromagnet and the iron block are in contact. The slider moves toward the side close to the sensor body, and a gap is generated between the opposite surfaces of the electromagnet and the iron block. When the goods are taken away and the electromagnet is switched to the energized state, a magnetic attraction force in the left-right direction can be applied to the second rod, which can drive the slider to move in the opposite direction, so that the opposite surfaces of the electromagnet and the iron block are restored to the contact state, and the slider completes the reset action.

[0038] The beneficial effects of the present invention are as follows: the lifting platform with a track structure provided by the present invention can detect the state of relative sliding of the cargo relative to the upper end surface of the slide by the sensor monitoring unit, and can determine the direction in which the support platform may deflect by processing and analyzing the sensor signal, and finally adjust the relative position of the cargo on the support platform by controlling the lead screw transmission assembly to drive the slide to move a certain amount of travel to the left or right relative to the support platform, so as to timely correct and improve the lateral deviation degree / state of the support platform, and can effectively suppress the significant lateral deviation of the scissor-type lifting platform. Therefore, the present invention can prevent lateral deviation and indirectly improve the stress condition of the mechanical structure of the scissor-type lifting platform during operation, especially the improvement of the stress condition of the mechanical structure of the scissor-type lifting platform that often bears heavy loads, which has a very significant improvement effect and helps to save inspection and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0040] Figure 2 It is a schematic diagram of the cross-sectional structure of the matching slide and sensor monitoring unit.

[0041] Figure 3 for Figure 2 Schematic diagram of the local enlarged structure at point A in the middle.

[0042] Figure 4 It is a schematic diagram of the partial top view of the upper end surface of the slide.

[0043] Figure 5 It is a schematic diagram of the cover plate structure viewed from above.

[0044] Figure 6 It is a top view structural schematic diagram of the matching connection between the slider and the rod.

[0045] Figure 7 This is a schematic diagram of the right view structure of the slider.

[0046] Figure 8 It is a schematic diagram of the cross-sectional structure of the reset drive unit in the main view direction.

[0047] Fig. 9 It is a schematic diagram of the top view of the reset drive unit.

[0048] In the figure: 10 vehicle body, 11 walking wheel assembly, 12 fixed support leg assembly; 20 scissor arm unit; 30 support platform; 40 slide seat, 41 type slot portion, 411 type slot 1, 4111 slot, 412 type slot 2, 4121 rail slot 1, 4122 rail slot 2, 42 cover plate, 421 sinking slot 1, 4211 strip through hole, 422 sinking slot 2, 423 sinking slot 3, 424 protruding block; 50 screw transmission assembly; 60 sensor monitoring unit, 61 slider, 61 1 elastic protrusion layer, 612 axial flange one, 613 first spring, 614 threaded hole, 615 arm plate, 6151 notch, 6152 cylindrical body, 6153 rail, 62 rod part one, 621 detection arm part, 63 sensor body, 64 rod part two, 641 radial edge arm, 65 reset drive part, 651 cylinder body, 6511 axial flange two, 6512 second spring, 652 arm body, 6521 protrusion, 6522 edge plate; 70 control unit. DETAILED DESCRIPTION

[0049] The structures, proportions, sizes, etc. illustrated in the drawings of the specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention. At the same time, the terms such as "upper", "lower", "front", "back", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical contents.

[0050] like Figure 1 , Figure 2 The lifting platform with a track structure shown in the figure includes a scissor arm unit 20 fixed on a vehicle body 10, a supporting platform 30 matched with the upper end of the scissor arm of the scissor arm unit 20, a slide 40 matched with the supporting platform 30 through a slide rail structure arranged along the left and right directions, a screw transmission assembly 50 capable of driving the slide 40 to move relative to the supporting platform 30 along the left and right directions, eight sensor monitoring units 60 distributed on the slide 40, and a control unit 70.

[0051] A running wheel assembly 11 and a fixed support leg assembly 12 are provided on the vehicle body 10 .

[0052] A plurality of cylindrical protrusions may be respectively arranged on the upper end surface of the support platform 30 and on the lower end surface of the slide 40. After the slide 40 is assembled on the support platform 30, the curved surface of the cylindrical protrusion on the lower end surface of the slide 40 is in tangential contact with the upper end surface of the support platform 30, and the curved surface of the cylindrical protrusion on the upper end surface of the support platform 30 is in tangential contact with the lower end surface of the slide 40, so that a line-surface contact matching relationship is formed between the opposing surfaces of the support platform 30 and the slide 40. The plurality of cylindrical protrusions arranged on the support platform 30 and the plurality of cylindrical protrusions arranged on the slide 40 are arranged alternately in the front-back direction, and each cylindrical protrusion crosses the upper end surface of the support platform 30 and the lower end surface of the slide 40 in the left-right direction. The cylindrical protrusions on the support platform 30 and the cylindrical protrusions on the slide 40 are arranged alternately and interspersed. By providing the cylindrical protrusions, it is possible to establish support between the opposing surfaces of the supporting platform 30 and the sliding seat 40 while relatively reducing the friction resistance when the two move relative to each other.

[0053] Eight sensor monitoring units 60 are disposed on the slide 40 in a left-right direction and are connected to the control unit 70 respectively. Figure 1 As shown, four of the eight sensor monitoring units 60 are relatively arranged near the four corners of the slide 40, and the remaining four sensor monitoring units 60 are relatively arranged at the central area of ​​the slide 40. In this way, the eight sensor monitoring units 60 can be connected to form two inner and outer rectangles, and the intersection points of the diagonals of the two rectangles can be overlapped or slightly offset.

[0054] The number of the sensor monitoring units 60 may be four or two, or even twelve. The number and distribution of the sensor monitoring units 60 need to be selected based on a comprehensive consideration of factors such as the area of ​​the upper end surface of the slide 40, the volume of the cargo that is usually loaded and unloaded (especially the size of the coverage of the contact points on the cargo with the upper end surface of the slide 40), etc., so that when the cargo is placed on the upper end surface of the slide 40, it can press down at least one of the sensor monitoring units 60 on the left side of the upper end surface of the slide 40 and at least one of the sensor monitoring units 60 on the right side of the upper end surface of the slide 40.

[0055] A groove portion 41 is formed on the upper end surface of the slide seat 40, which is matched with each sensor monitoring unit 60 in a one-to-one manner. The groove portion 41 includes a groove 1 411 and a groove 2 412 formed on the inner bottom surface of the groove 1 411. The top view of the groove 1 411 and the top view of the groove 2 412 are both rectangular in shape, as shown in FIG. Figure 4 .

[0056] A rail groove 1 4121 extending in the left-right direction is formed on the inner bottom surface of the second profile groove 412 , and rail grooves 4122 are respectively provided at the lower parts of the front and rear inner walls of the second profile groove 412 .

[0057] A cover plate 42 is matched with each corresponding groove portion 41 and after the cover plate 42 is fixedly sealed at the upper end of the corresponding groove portion 41, the upper end surface of the cover plate 42 is flush with the upper end surface of the slide seat 40, that is, the two upper end surfaces can be in the same plane.

[0058] like Figures 2 to 9 As shown, the sensor monitoring unit 60 includes a slider 61, a rod portion 1 62 fixed on one end surface of the slider 61 (the right end surface of the slider 61 in the figure), a sensor body 63, a rod portion 2 64 fixed on the other end surface of the slider 61 (the left end surface of the slider 61 in the figure), and a reset drive portion 65.

[0059] The slider 61 is disposed in the second groove 412 and matches the second groove 412 via a slide rail structure arranged in the left-right direction, so that the slider 61 can move in the left-right direction relative to the second groove 412. It can be seen that the left-right extension length of the second groove 412 is greater than the left-right extension length of the slider 61.

[0060] Two arm plates 615 are formed at the lower part of the slider 61, which are spaced front and back. A notch 6151 is formed at the inner root of the arm plate 615, so that the arm plate 615 can be elastically deformed toward the inside (i.e., toward the side close to each other). A cylindrical body 6152 is formed at the lower end of the arm plate 615, so that the cylindrical surface of the cylindrical body 6152 faces downward. A rail 6153 is formed on the outer surface of the arm plate 615 and near the center position. The cylindrical body 6152 and the rail 6153 both extend in the left and right directions, and respectively correspond to the rail groove 1 4121 and the rail groove 2 4122 provided on the profile groove 2 412, so that the lower part of the slider 61 establishes a matching relationship with the profile groove 2 412 and can move in the left and right directions relative to the slide seat 40 or the profile groove portion 41.

[0061] The cross section of the rail groove 1 4121 is cylindrical, so that the cylindrical body 6152 can establish a profile contact matching relationship with the rail groove 1 4121. The cross section of the clamping rail 6153 is triangular and the lower side is formed into a curved surface, see Figure 7 A profile contact matching relationship can be established between the said card rail 6153 and the said second rail groove 4122 .

[0062] When the lower part of the slider 61 is installed in the second groove 412, the lower curved surface of the rail 6153 contacts the inner wall of the second groove 412, and a squeezing force is generated between the rail 6153 and the inner wall of the second groove 412, so as to cause the arm plate 615 to deviate toward the side close to each other, forming a gap, so that the lower part of the slider 61 can continue to move downward relative to the second groove 412. Finally, the rail 6153 will be inserted into the second groove 4122, the cylindrical body 6152 will be inserted into the first groove 4121, and the second groove 4122 will exert a downward pushing force on the upper inclined surface of the rail 6153, so as to cause the lower part of the slider 61 to be stably inserted into the second groove 412.

[0063] A strip through hole 4211 is formed on the cover plate 42 and at a position corresponding to the position directly above the second groove 412, so that the upper end surface of the elastic protrusion layer 611 fixedly arranged on the upper part of the slider 61 can pass through the strip through hole 4211 and the upper end surface of the elastic protrusion layer 611 can extend outward / upward relative to the upper end surface of the cover plate 42.

[0064] The strip-shaped through hole 4211 extends in the left-right direction, and in the process of the slider 61 moving relative to the second groove 412, the left and right ends of the strip-shaped through hole 4211 can always maintain a corresponding distance from the left and right ends of the slider 61, thereby providing sufficient clearance space for the slider 61 to reciprocate in the left-right direction relative to the cover plate 42 or relative to the slide seat 40.

[0065] In a specific implementation, the number of the strip-shaped through holes 4211 provided on the cover plate 42 can be one or more. In the illustrated scheme, the number of the strip-shaped through holes 4211 provided on the cover plate 42 is three, and the three strip-shaped through holes 4211 are distributed alternately front to back. Correspondingly, three protrusions are formed on the upper end surface of the elastic protrusion layer 611 fixed to the upper part of the slider 61. After the cover plate 42 is assembled on the upper end of the groove portion 41, the three protrusions can be matched one-to-one with the three strip-shaped through holes 4211, and the upper end surface of the protrusion can pass through the strip-shaped through hole 4211, and finally the upper end surface of each protrusion protrudes upward / outward relative to the upper end surface of the cover plate 42. After the cargo is pressed on the slide 40, it can contact the elastic protrusion layer 611 on the upper part of the slider 61, and can press the elastic protrusion layer 611 downward to deform, and can form a large contact friction between the contact surface of the slider 61 and the cargo. When the cargo has a tendency to move relative to the upper end surface of the slide 40 or moves relative to the slide 40 due to the lateral deviation of the support platform 30, this movement tendency or relative movement can cause the static state or position state of the slider 61 to change, causing the slider 61 to vibrate or move, and this vibration or displacement can be transmitted to the sensor body 63 through the detection arm 621, causing the sensor body 63 to generate a corresponding sensing signal.

[0066] The protrusion formed on the upper part of the slider 61 can be an embodiment in which the protrusion is integrated with the elastic protrusion layer 611, that is, the protrusion is a part of the body of the elastic protrusion layer 611, and is a ridge structure protruding upward relative to the upper end surface of the elastic protrusion layer 611. The end surface of the elastic protrusion layer 611 passing through the strip-shaped through hole 4211 (that is, the upper end surface of the ridge structure) is a serrated surface, and the serrations are distributed in the left and right directions, see Figure 2 , Figure 3 .

[0067] A detection arm 621 is fixedly disposed at the free end of the rod 1 62, so that the detection arm 621 extends into the groove 1 411 and matches with the sensor body 63 fixedly disposed in the groove 1 411. When the slider 61 moves relative to the groove 2 412, the detection arm 621 can trigger the sensor body 63 to generate a sensing signal.

[0068] One end of the reset driving portion 65 can be relatively fixed in the first groove 411 , and the other end can be inserted into the second groove 412 and matched with the free end of the second rod portion 64 .

[0069] The reset drive unit 65 can apply an elastic pulling force along the left-right direction to the rod portion 64 ( Figure 2The situation shown is an elastic pulling force toward the left side), and when the slider 61 moves toward the side (right side) close to the sensor body 63, the elastic pulling force of the reset drive part 65 acting on the rod part 2 64 can drive the slider 61 to move in the opposite direction (towards the left side) to complete the reset.

[0070] The control unit 70 can receive and process the sensor signals transmitted by each sensor body 63 in real time, and generate corresponding instructions to control the screw transmission assembly 50 to make corresponding response actions, that is, to remain stationary and drive the slide 40 to move a certain stroke to the left or right relative to the support platform 30.

[0071] When the control unit 70 detects that the sensor signal transmitted by at least one sensor body 63 in the sensor monitoring unit 60 is abnormal, it will send an action instruction to the screw transmission assembly 50, so that it drives the slide 40 to move leftward or rightward with different strokes relative to the support platform 30. When the vibration frequency of the slider 61 falls into the preset range and / or the slider 61 produces a rightward displacement, the sensor signal can be abnormal.

[0072] like Figures 2 to 3 , Figure 6 to Figure 7 As shown, an annular axial flange 1 612 is formed in the middle of the (right) end surface of the slider 61. A first spring 613 is fixedly sleeved on the axial flange 1 612. A threaded hole 614 is formed on the inner bottom surface of the axial flange 1 612. The left end of the rod 1 62 passes through the first spring 613 and can match the threaded hole 614, so that the rod 1 62 and the slider 61 are fixedly connected as a whole.

[0073] After the slider 61 is assembled in the second groove 412, in the initial state, a left-right spacing is formed between the free end (left end) of the first spring 613 and the inner end surface (right end surface) of the second groove 412, so that the left-right spacing is within the range of 10 mm, preferably within the range of 2 mm to 5 mm.

[0074] When the slider 61 moves relative to the second groove 412, the free end of the first spring 613 can contact the inner end face (right end face) of the second groove 412, and can prevent the slider 61 from moving to the left or right relative to the slide seat 40 or the groove portion 41 at a speed and acceleration, thereby providing / creating sufficient time for the screw drive assembly 50 to adjust the slide seat 40 to a suitable position relative to the support platform 30 in a timely manner, and helping to prevent the slider 61 from moving to the end of its stroke and the slide seat 40 still not being adjusted to a suitable position relative to the support platform 30.

[0075] By adjusting the matching length between the first rod 62 and the threaded hole 614, the initial matching state between the detection arm 621 and the sensor body 63 can be adjusted. The second rod 64 and the slider 61 are matched through a threaded structure.

[0076] like Figures 2 to 3 , Figures 8 to 9 As shown, the reset driving part 65 includes a cylinder 651 and a pair of arms 652, the two arms 652 are fixedly arranged on the front side and the rear side of the cylinder 651, and the free ends of the arms 652 extend axially outward (toward the left) relative to the port side of the cylinder 651. The cylinder 651 extends into the second groove 412.

[0077] A through hole is formed on the inner bottom surface of the cylinder 651 for the second rod portion 64 to pass through, and a second annular axial flange 6511 is formed on the periphery of the through hole. A second spring 6512 is fixedly sleeved on the second axial flange 6511.

[0078] A radial edge arm 641 is formed on the second rod portion 64. The outer diameter of the radial edge arm 641 is not larger than the inner diameter of the cylinder 651, and is larger than the outer diameter of the second spring 6512.

[0079] The axial distance between the free end of the second spring 6512 and the port of the cylinder 651 is greater than the axial distance between the inner end surface (right end surface) of the radial edge arm 641 and the port of the cylinder 651 .

[0080] After assembly, the free end side of the arm body 652 can match the cover plate 42 and / or the first groove 411, so that the reset drive unit 65 and the first groove 411 are fixedly connected, so that the cylinder body 651 can be fixedly suspended on the upper part of the port of the second groove 412. A left-right spacing is formed between the opposite surfaces of the cylinder body 651 and the slider 61, and when the slider 61 moves relative to the second groove 412, the spacing between the cylinder body 651 and the slider 61 can change.

[0081] In the initial state, if the radial edge arm 641 on the second rod portion 64 contacts the free end of the second spring 6512, then in the initial position, the second spring 6512 will interfere with / inhibit the movement of the slider 61 relative to the slide seat 40 or relative to the groove portion 41, which is not conducive to the detection sensitivity of the initial position. Therefore, it is preferred that in the initial state, there is an implementation scheme in which there is a left-right spacing between the radial edge arm 641 and the free end of the second spring 6512, and the left-right spacing is basically equivalent to the left-right spacing between the first spring 613 and the inner end surface of the second groove 412. A relatively slightly smaller implementation scheme is preferred (that is, the spacing between the radial edge arm 641 and the free end of the second spring 6512 is 1mm to 2mm smaller than the spacing between the first spring 613 and the inner end surface of the second groove 412), so that the first spring 613 and the second spring 6512 can act simultaneously to prevent the slider 61 from continuing to move relative to the slide seat 40 or relative to the groove portion 41 at a higher speed and acceleration, and can more stably and reliably provide more sufficient time for the screw drive assembly 50 to adjust the slide seat 40 to the appropriate position relative to the support platform 30 in a timely manner, further suppressing the probability of the slider 61 moving to the end of its stroke and the slide seat 40 still not being adjusted to the appropriate position relative to the support platform 30.

[0082] The compressive force of the first spring 613 is greater than the compressive force of the second spring 6512 .

[0083] In order to prevent the slider 61 and the cylinder 651 from violently hitting the inner wall of the groove portion 41 during the reset action, a buffer body (not shown) can be fixedly arranged at the free end of the second rod portion 64. In the initial state, the free end surface of the buffer body contacts the innermost protrusion 424 or the inner wall of the second groove 412.

[0084] The free end of the second rod portion 64 can be extended to above the inner bottom surface of the first groove 411 , and a vertical distance is formed between the outer peripheral surface of the second rod portion 64 and the inner bottom surface of the first groove 411 .

[0085] Two protrusions 6521 are formed on the opposite surfaces of the two arm bodies 652. The multiple protrusions 6521 on each arm body 652 are arranged alternately on the left and right. An edge plate 6522 extending downward is formed on the lower end surface of the protrusion 6521. Correspondingly, a plurality of protrusion blocks 424 are formed on the cover plate 42, and a slot 4111 that can be matched with each edge plate 6522 is formed on the inner bottom surface of the groove 1 411. The matching relationship between the edge plate 6522 and the slot 4111 is interference fit.

[0086] After the cover plate 42 is fixedly sealed on the upper end of the groove portion 41, the protrusion 424 can be inserted between two adjacent protrusions 6521, and the two adjacent protrusions 424 can sandwich the protrusion 6521, and the cover plate 42 can exert downward pressure on the arm 652, so that the left end of the reset drive portion 65 can be stably and firmly fixed in the groove 1 411. A left-right spacing can be formed between the end surface of the port of the barrel 651 and the left inner wall surface of the groove 2 412, or the two opposite end surfaces can be in contact.

[0087] The present invention can also be designed as an implementation scheme in which elastic tension and (electric) magnetic attraction coexist (during the reset action): that is, in the initial state, a left-right spacing is formed between the radial edge arm 641 and the second spring 6512, and the left-right spacing is smaller than the left-right spacing between the first spring 613 and the inner end surface of the second groove 412. An electromagnet is fixedly provided on one side of the reset drive portion 65 fixed in the first groove 411, so that the electromagnet is connected to the control unit 70. The control unit 70 can selectively switch the electromagnet between the power-on and power-off states. The free end of the second rod portion 64 extends into the first groove 411 and is fixed with an iron block. In the initial state, the electromagnet contacts the opposite surface of the iron block.

[0088] The slider 61 moves toward the side close to the sensor body 63, and a gap can be generated between the opposite surfaces of the electromagnet and the iron block, and when the electromagnet is switched to the energized state, an electromagnetic suction force along the left and right direction can be applied to the second rod 64 to drive the slider 61 to move in the opposite direction to complete the reset. During this period, if the stroke amount of the slider 61 moving toward the side close to the sensor body 63 is greater than the left and right gap between the radial edge arm 641 and the second spring 6512 (in the initial state), the second spring 6512 is compressed to a certain extent. When the goods are removed and no longer press on the slider 61 (upper end surface), the elastic tension of the second spring 6512 can work together with the electromagnetic suction force applied by the electromagnet to the iron block (or the left end of the second rod 64) to move the slider 61 toward the side away from the sensor body 63 (i.e., the left side), complete the reset, restore the electromagnet and the opposite surface of the iron block to the contact state, and after a set time interval, restore the electromagnet to the power-off state (by the control unit 70).

[0089] An electromagnet is fixed on one side of the reset driving part 65 fixed in the first groove 411, so that the right end surface of the electromagnet is retracted to the left relative to the left edge of the second groove 412 and forms a certain left-right spacing. The electromagnet can be fixed between the two arms 652.

[0090] The control unit 70 controls the on / off state of the electromagnet, which may be based on the change of the sensor signal fed back by the sensor body 63; or a gravity sensor may be additionally provided, and the gravity sensor is used to detect the pressure state of the upper end surface of the slide 40, and after detecting that the goods pressing on the slide 40 are removed (when the sensor signal of the gravity sensor is in the initial state), the gravity sensor feeds back this change to the control unit 70, and the control unit 70 can issue a command to switch the electromagnet from the power-off state (initial state) to the power-on state, and can automatically restore the power-off state after maintaining power on for several seconds.

[0091] By setting an electromagnet to interact with the iron block provided on the second rod 64, and using electromagnetic suction to promote the reset of the slider 61, the accuracy of the reset position of the slider 61 can be improved (that is, the relative deviation between the reset position of the slider 61 and its original position in the initial state is significantly reduced).

[0092] An elastic layer, such as a sponge layer, may be fixedly disposed on the end surface of the electromagnet facing the iron block and / or on the end surface of the iron block facing the electromagnet to provide a buffering effect. The thickness of the elastic layer (dimensions in the left-right direction) should be such as to avoid causing a significant adverse effect on the magnetic attraction of the electromagnet on the iron block.

[0093] In order to adapt to the components arranged in the groove portion 41, as Figures 2 to 3 , Figure 5 As shown, a sink groove 1 421 is formed on the lower end surface of the cover plate 42. The strip-shaped through hole 4211 is formed on the inner bottom surface of the sink groove 1 421. A sink groove 2 422 and a sink groove 3 423 are formed on one side of the sink groove 1 421, and the sink groove 3 423 is closer to the edge of the cover plate 42 than the sink groove 2 422. The width (front-to-back dimension, the same below) of the sink groove 2 422 is smaller than the width of the sink groove 3 423, and the width of the sink groove 3 423 is smaller than the width of the sink groove 1 421. The depth of the sink groove 1 421 is significantly greater than the depth of the sink groove 3 423, and the depth of the sink groove 3 423 is greater than the depth of the sink groove 2 422. The protrusion 424 is formed on the other side (left side) of the recessed groove 421, and an insert plate is formed at the edge position of the end side of the cover plate 42, so that after assembly, the insert plate can be inserted into the (left side) edge position of the profile groove 411 and the lower end surface of the insert plate contacts the inner bottom surface of the profile groove 411.

[0094] After the cover plate 42 is fixedly sealed at the upper end of the profile groove portion 41 or fixedly sealed at the upper end of the profile groove 1 411, the slider 61 corresponds to the position directly below the sink groove 1 421 and the left-right extension length of the sink groove 1 421 is greater than the left-right length of the upper portion of the slider 61. The free end of the rod portion 1 62 and the detection arm portion 621 correspond to the vertical spacing formed between the inner bottom surface of the sink groove 2 422 and the inner bottom surface of the profile groove 1 411. The sensor body 63 corresponds to the vertical spacing formed between the inner bottom surface of the sink groove 3 423 and the inner bottom surface of the profile groove 1 411.

[0095] Support legs are formed on the inner bottom surface of the first sink groove 421 near the four corners. After the cover plate 42 is fixedly sealed on the upper end of the profile groove portion 41, the lower end surface of each support leg can contact the inner bottom surface of the first profile groove 411 or the inner bottom surface of the second profile groove 412, thereby supporting the cover plate 42.

[0096] The control unit 70 is fixed in a cavity formed on the lower end surface of the slide seat 40 .

[0097] The sensor body 63 is selected as a grating sensor, and the moving grating of the grating sensor is fixed at the free end (right end) of the detection arm 621. A groove extending or penetrating in the left-right direction is formed on the body of the grating sensor, and the free end of the detection arm 621 can extend into the groove. The fixed grating of the grating sensor is fixed on the bottom surface or side of the groove. In order to suppress the adverse effects of the cantilever effect on the detection arm 621, a support track matching the detection arm 621 can be set on the groove to enable the detection arm 621 to move in the left-right direction in a horizontal plane or in a plane relatively parallel to the upper end surface of the slide 40, and the moving grating and the fixed grating carried by it can be stably matched.

[0098] like Figure 2 , Figure 3 As shown, after the cover plate 42 is fixedly sealed on the upper end of the profiled groove portion 41, the free end of the first spring 613 is spaced a certain distance from the right inner wall of the profiled groove 2 412 and the right inner wall of the sink groove 1 421 (at this time, the right inner wall of the profiled groove 2 412 and the right inner wall of the sink groove 1 421 are in the same vertical plane). When the slider 61 moves to the right relative to the profiled groove 2 412, the free end of the first spring 613 can contact the right inner wall of the profiled groove 2 412 and the right inner wall of the sink groove 1 421. Compared with the embodiment in which the free end of the first spring 613 only contacts the right inner wall of the profiled groove 2 412, this improved method can help the first spring 613 to be more stable and function better.

[0099] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. The present invention can be improved in many aspects without violating the overall concept, and those familiar with the technology can modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A lifting platform with a track structure, comprising a scissor arm unit (20) fixed on a vehicle body (10) and a supporting platform (30) matched on the upper part of the scissor arm unit (20); characterized in that: It also includes a slide seat (40) matched with the support platform (30) via a slide rail structure, a screw drive assembly (50) capable of driving the slide seat (40) to move in a left-right direction relative to the support platform (30), a plurality of sensor monitoring units (60) distributed on the slide seat (40), and a control unit (70); A plurality of sensor monitoring units (60) are disposed on the slide seat (40) in a left-right relative manner and are respectively connected to the control unit (70); A groove portion (41) corresponding to and matching the sensor monitoring unit (60) is formed on the upper end surface of the slide seat (40); the groove portion (41) comprises a groove 1 (411) and a groove 2 (412) formed on the inner bottom surface of the groove 1 (411); a cover plate (42) is provided corresponding to each groove portion (41) and the cover plate (42) is fixedly sealed at the upper end of the groove portion (41) corresponding to the groove portion (41) so that the upper end surface of the cover plate (42) is flush with the upper end surface of the slide seat (40); The sensing monitoring unit (60) comprises a slider (61), a rod portion 1 (62) fixedly arranged on an end surface of one side of the slider (61), a sensor body (63), a rod portion 2 (64) fixedly arranged on an end surface of the other side of the slider (61), and a reset drive portion (65); The slider (61) is arranged in the second groove (412) and matches the second groove (412) via a slide rail structure, so that the slider (61) can move in the left-right direction relative to the second groove (412); a strip-shaped through hole (4211) is formed on the cover plate (42) at a position corresponding to the position directly above the second groove (412), so that the upper end surface of the elastic protrusion layer (611) fixedly arranged on the upper part of the slider (61) can pass through the strip-shaped through hole (4211) and protrude outward relative to the upper end surface of the cover plate (42); The detection arm (621) is fixedly arranged at the free end of the first rod (62); the detection arm (621) extends into the first groove (411) and matches with the sensor body (63) fixedly arranged in the first groove (411); when the slider (61) moves relative to the second groove (412), the detection arm (621) can trigger the sensor body (63) to generate a sensing signal; One end of the reset driving portion (65) is fixed in the first groove (411), and the other end can be inserted into the second groove (412) and, after being matched with the second rod portion (64), can exert elastic tension and / or magnetic attraction force along the left-right direction on the second rod portion (64), and after the slider (61) moves toward the side close to the sensor body (63), it can drive the slider (61) to move in the opposite direction; The control unit (70) can receive and process the sensing signals transmitted by each sensor body (63) in real time, and generate corresponding instructions to control the lead screw transmission assembly (50) to perform a response action.

2. The lifting platform with a track structure according to claim 1, characterized in that: An annular axial flange (612) is formed on the end surface of the slider (61); a first spring (613) is fixedly sleeved on the axial flange (612); a threaded hole (614) is formed on the inner bottom surface of the axial flange (612); one end of the rod (62) passes through the first spring (613) and can be matched and connected with the threaded hole (614); After assembly, a left-right spacing is formed between the free end of the first spring (613) and the inner end surface of the second groove (412).

3. The lifting platform with a track structure according to claim 1 or 2, characterized in that: The second rod portion (64) and the slider (61) are matched with each other via a threaded structure; The reset drive part (65) comprises a cylinder (651) and a pair of arms (652), wherein the two arms (652) are fixedly arranged on the front side and the rear side of the cylinder (651), and the free ends of the arms (652) extend axially outward relative to the port side of the cylinder (651); the cylinder (651) extends into the second groove (412); A through hole is formed on the inner bottom surface of the cylinder (651) for the second rod portion (64) to pass through, and a second annular axial flange (6511) is formed on the periphery of the through hole; a second spring (6512) is fixedly sleeved on the second axial flange (6511); A radial edge arm (641) is formed on the second rod portion (64), so that the outer diameter of the radial edge arm (641) is not greater than the inner diameter of the cylinder (651), and is greater than the outer diameter of the second spring (6512); the axial distance between the free end of the second spring (6512) and the port of the cylinder (651) is not less than the axial distance between the inner end surface of the radial edge arm (641) and the port of the cylinder (651); After assembly, the free end side of the arm body (652) can match the cover plate (42) and / or the first groove (411), so that the reset drive unit (65) is fixedly connected to the first groove (411), and the cylinder body (651) is fixedly suspended on the upper part of the port of the second groove (412); a left-right spacing is formed between the opposing surfaces of the cylinder body (651) and the slider (61).

4. The lifting platform with a track structure according to claim 3, characterized in that: A left-right spacing is formed between the radial edge arm (641) and the second spring (6512), and the left-right spacing is smaller than the spacing formed between the first spring (613) and the inner end surface of the second groove (412); An electromagnet is fixedly provided on one side of the reset drive portion (65) fixed in the first groove (411), so that the electromagnet is connected to the control unit (70); the control unit (70) can selectively switch the electromagnet between a power-on state and a power-off state; The free end of the second rod portion (64) extends into the first groove (411) and is fixed with an iron block; in the initial state, the electromagnet contacts the opposite surface of the iron block; The slider (61) moves toward one side of the sensor body (63), which can cause a gap to be generated between the opposite surfaces of the electromagnet and the iron block; after the electromagnet is switched to a powered state, a magnetic attraction force can be applied to the second rod portion (64) to drive the slider (61) to move in the opposite direction.

5. The lifting platform with a track structure according to claim 3, characterized in that: A plurality of protrusions (6521) are respectively formed on opposite surfaces of the two arm bodies (652); the plurality of protrusions (6521) on each arm body (652) are arranged alternately on the left and right; a downwardly extending edge plate (6522) is formed on the lower end surface of the protrusion (6521); correspondingly, a plurality of protrusion blocks (424) are formed on the cover plate (42); and slots (4111) that can correspond to and match each edge plate (6522) are formed on the inner bottom surface of the first groove (411); After the cover plate (42) is fixedly sealed on the upper end of the groove portion (41), the protruding block body (424) and the protruding body (6521) are matched by plug-in connection, and the cover plate (42) can exert downward pressure on the arm body (652).

6. The lifting platform with a track structure according to claim 1, characterized in that: The end surface of the elastic protruding layer (611) that passes out of the strip-shaped through hole (4211) is a serrated surface, and the serrations are distributed in the left-right direction.

7. The lifting platform with a track structure according to claim 1, characterized in that: The sensor body (63) is a grating sensor, and the moving grating of the grating sensor is fixed to the free end of the detection arm (621); a groove extending or penetrating in the left-right direction is formed on the body of the grating sensor, and the free end of the detection arm (621) can extend into the groove to match the fixed grating provided on the bottom surface or side surface of the groove.

8. The lifting platform with a track structure according to claim 1, characterized in that: A buffer body is fixedly arranged at the free end of the second rod portion (64); the free end surface of the buffer body is in contact with the inner wall of the innermost protruding block (424) or the second groove (412).

9. The lifting platform with a track structure according to claim 1, characterized in that: An electromagnet is fixedly provided on one end of the reset drive portion (65) that protrudes into the second groove (412), and the electromagnet is connected to a control unit (70) so that the control unit (70) can selectively control the electromagnet to switch between a power-on state and a power-off state; An iron block is fixedly provided at the free end of the second rod portion (64); in the initial state, the electromagnet contacts the opposite surface of the iron block; The slider (61) moves toward one side of the sensor body (63), which can cause a gap to be generated between the opposite surfaces of the electromagnet and the iron block. When the electromagnet is switched to a power-on state, a magnetic attraction force can be applied to the second rod portion (64) to drive the slider (61) to move in the opposite direction.

10. The lifting platform with a track structure according to claim 9, characterized in that: The elastic layer is fixedly arranged on either or both of the end surface of the electromagnet facing the iron block and the end surface of the iron block facing the electromagnet.

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