A weighing system for high-speed rail transport items

Abstract

The present invention is applicable to the field of high-speed rail weighing technology, and provides a weighing system for high-speed rail transport items, including a load-bearing beam, a shim, and a weight sensor arranged between the shim and the load-bearing beam, the weight sensor is provided with a pressure head for bearing force, the lower surface of the load-bearing beam is provided with a pressure cap in contact with the pressure head, the lower surface of the weight sensor is provided with a lifting component for adjusting the position of the weight sensor, the lifting component includes a first screw rod, the first screw rod is rotatably connected to the lower surface of the weight sensor, an L-shaped cavity is provided inside the shim near the side of the weight sensor, the lower end thread of the first screw rod penetrates into the vertical cavity of the L-shaped cavity, the present invention can adjust the position of the weight sensor by means of threaded drive, avoids the gap between the pressure head and the pressure cap as much as possible, ensures the accuracy of the later weight detection of the transported items in the high-speed rail motor vehicle, and further ensures the stability of the use of the weighing system.

Description

Technical Field

[0001] The present invention relates to the technical field of high-speed rail weighing, and more specifically, to a weighing system for high-speed rail transport items. Background Art

[0002] High-speed rail has the advantages of fast speed and high punctuality, and is one of the most ideal ways to transport express mail. When transporting goods on existing high-speed rail, it is generally necessary to weigh the goods in the carriage. The most convenient way to weigh the goods transported inside the carriage is the track scale. The high-speed rail carriage only needs to pass through the track scale to calculate the weight of the goods transported in the carriage.

[0003] However, when the existing track scale is squeezed by the passing train for a long time, the pressure head on the top of the sensor will inevitably be depressed. The existing track scale is generally equipped with longitudinal and lateral limiters to reduce the deviation of the measuring table. Therefore, when the pressure head on the top of the sensor is depressed, the load-bearing beam will reset upward under the action of the longitudinal limiter, so that the transition rail is flush with the normal track. However, this will result in a certain gap between the pressure cap and the pressure head when the load-bearing beam is reset. Therefore, the next time a train passes, it will cause inaccurate sensor detection, affecting the accuracy of weighing the items transported inside the EMU. Summary of the invention

[0004] In view of the deficiencies in the prior art, an object of the present invention is to provide a weighing system for high-speed rail transport items.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A weighing system for high-speed rail transport items includes a load-bearing beam, a pad iron, and a weight sensor arranged between the pad iron and the load-bearing beam, the weight sensor is provided with a pressure head for receiving force, the lower surface of the load-bearing beam is provided with a pressure cap in contact with the pressure head, the lower surface of the weight sensor is provided with a lifting assembly for adjusting the position of the weight sensor, the lifting assembly includes a first screw rod, the first screw rod is rotatably connected to the lower surface of the weight sensor, an L-shaped cavity is provided inside the pad iron on a side close to the weight sensor, the lower end of the first screw rod is threadedly penetrated into the vertical cavity of the L-shaped cavity, the lower surface of the first screw rod is provided with a first rotating shaft that can drive the first screw rod to rotate, the lower end of the first rotating shaft is rotatably connected to the bottom wall of the L-shaped cavity, the lower end of the first rotating shaft is provided with a first gear that drives the first rotating shaft to rotate unidirectionally, the bottom wall of the L-shaped cavity is provided with a guide rail, the guide rail is slidably connected with a first rack meshing with the first gear, the pressure head is provided with a trigger assembly for controlling the displacement of the first rack, and the lower surface of the weight sensor is provided with a locking assembly for secondary support thereof.

[0007] The present invention is further configured as follows: an extension groove is provided on the lower surface of the first screw, the upper end of the first rotating shaft extends into the extension groove and slides in the extension groove, limiting sliding grooves extending from the lower surface of the first screw are provided on the inner walls on both sides opposite to each other, and a limiting sliding block sliding in the limiting sliding groove is provided on the outer surface of the first rotating shaft close to the limiting sliding groove.

[0008] The present invention is further configured as follows: the first gear rotation sleeve is arranged on the outer surface of the first rotating shaft, a built-in cavity is opened in the first gear, and a plurality of rotating seats arranged in a circular array are arranged on the outer surface of the first rotating shaft located at the built-in cavity, and movable teeth are rotatably connected to the rotating seat, and a torsion spring is arranged between the movable teeth and the rotating seat. The movable teeth are kept vertically with the rotating seat under the action of the torsion spring, and a baffle is arranged on the side of the rotating seat to block one side of the movable teeth, and a plurality of fixed teeth meshing with the movable teeth are arranged on the inner wall of the built-in cavity.

[0009] The present invention is further configured as follows: the trigger assembly includes a fixed pressure plate, which is arranged on the top of the pressure head and contacts with the lower surface of the pressure cap, a transmission cavity is opened in the load-bearing beam, an L-shaped rod is arranged on the side of the fixed pressure plate, the upper end of the L-shaped rod vertical rod slides through the transmission cavity, a movable shaft is rotatably connected between the inner walls on both sides of the transmission cavity opposite to each other, a rotating plate is sleeved on the outer surface of the movable shaft, the movable shaft is located at the center of the rotating plate, a pushing structure is arranged on the side of the rotating plate away from the L-shaped rod, transmission slide grooves are opened on both sides of the rotating plate, and transmission slide rods are arranged on the pushing structure and the side of the L-shaped rod vertical rod close to the rotating plate, and the other end of the transmission slide rod extends into the transmission slide groove and slides in the transmission slide groove.

[0010] The present invention is further configured as follows: the pushing structure includes a first pushing rod, the first pushing rod is arranged in the transmission cavity and is connected to the transmission sliding rod, the lower end of the first pushing rod slides through the lower surface of the load-bearing beam, the lower end of the first pushing rod is provided with a second pushing rod, the lower end of the second pushing rod slides through the L-shaped cavity, a delay structure is provided between the second pushing rod and the first rack, the upper end of the second pushing rod is provided with a contraction shell, the lower end of the first pushing rod slides through the contraction shell, and the lower end of the first pushing rod is provided with a first inner plate that slides in the contraction shell and contacts the top wall of the contraction shell.

[0011] The present invention is further configured as follows: the locking assembly includes a locking rod, which is arranged on the lower surface of the weight sensor, and a contraction groove adapted to the locking rod is provided on the upper surface of the washer iron, the lower end of the locking rod extends into the contraction groove and slides in the contraction groove, an active cavity is provided in the washer iron, and a plurality of vertically arranged pin grooves are provided on a side surface of the locking rod facing the active cavity, a pin shaft with one end sliding into the contraction groove is provided in the active cavity, one end of the pin shaft located in the contraction groove is adapted to the pin groove, and one end of the pin shaft located in the active cavity is provided with a second rack sliding on the bottom wall of the active cavity, and a tension spring movably sleeved on the outer surface of the pin shaft is provided between the second rack and the active cavity.

[0012] The present invention is further configured as follows: a third gear is rotatably connected to the inner wall of the movable cavity and is meshed with the second rack; a third rack is meshed on the upper side of the third gear; a supporting slide rod is arranged between the left and right inner walls of the movable cavity; the third rack is slidably sleeved on the outer surface of the supporting slide rod; a movable through groove extending from the upper surface of the washer is opened on the top wall of the movable cavity; an L-shaped movable push rod is arranged on the upper surface of the third rack; a vertical rod of the movable push rod extends out of the upper surface of the washer through the movable through groove and slides in the movable through groove; a trigger block is arranged on the outer surface of the second push rod facing the movable push rod; the trigger block also slides through the L-shaped cavity; the upper side of the trigger block is an inclined surface; an end of the movable push rod cross bar away from the vertical rod contacts with the inclined surface of the trigger block and a side surface facing away from the second push rod.

[0013] The present invention is further configured as follows: the delay structure includes a first push plate and a second push plate, the side of the first push plate away from the second push plate is hinged to the lower end of the second push rod, the side of the second push plate away from the first push plate is hinged to the first rack, a delay rod is provided on the side of the first push plate close to the second push plate, a delay cavity is opened in the second push plate, the other end of the delay rod slides through the delay cavity, and the end of the delay rod located in the delay cavity is provided with a second inner plate sliding in the delay cavity, and the initial position of the second inner plate is in contact with the left inner wall of the delay cavity.

[0014] The present invention is further configured as follows: a second rotating shaft is rotatably connected to the bottom wall of the L-shaped cavity, a second gear is rotatably sleeved on the outer surface of the second rotating shaft and meshed with the first gear, a connection structure between the second gear and the second rotating shaft is the same as a connection structure between the first gear and the first rotating shaft, a second screw is provided at the upper end of the second rotating shaft, a connection structure between the second screw and the second rotating shaft is the same as a connection structure between the first screw and the first rotating shaft, an upper end thread of the second screw penetrates into the contraction groove, and an upper end of the second screw is rotatably connected to a support plate that slides in the contraction groove, and the support plate contacts the lower surface of the locking rod.

[0015] The advantages of the present invention are:

[0016] First, the present invention can adjust the position of the weight sensor by means of threaded drive, thus avoiding the gap between the pressure head and the pressure cap as much as possible, ensuring the accuracy of the subsequent weight detection of the transported items in the high-speed rail vehicle, and further ensuring the stability of the weighing system. At the same time, the threaded adjustment has a self-locking effect, so the weight sensor will not slide downward after being adjusted upward, ensuring the stability of the weight sensor during weighing.

[0017] Secondly, the present invention is provided with a trigger component, so that the first screw can be controlled to rotate immediately after the pressure head is pressed and the load-bearing beam is reset, and the weight sensor can be driven to move upward, thereby achieving the purpose of automatic control. No human control and human monitoring are required, and human errors that affect the accuracy of weighing items transported by high-speed railways are avoided as much as possible.

[0018] Thirdly, the present invention provides a locking rod, a pin shaft, a pin groove and other structures. When the pin shaft is inserted into the pin groove, the pin shaft can form a limiting effect on the locking rod, thereby preventing the locking rod from sliding downward in the contraction groove, thereby achieving the purpose of multiple supports for the weight sensor, further ensuring the stability and firmness of the weight sensor after adjusting the height, and also automatically unlocking the locking rod when it is necessary to adjust the height of the weight sensor upward, thereby minimizing the problem that the locking rod is restricted by the pin shaft, resulting in the weight sensor being unable to move upward and getting stuck, thereby ensuring the smoothness of the weighing system during operation.

[0019] Fourthly, the present invention is provided with a delay structure so that there is a time difference between the unlocking action of the locking rod and the rotation of the first screw, thereby minimizing the problem that the locking rod is not unlocked, resulting in the first screw being unable to push the weight sensor upward, and further ensuring the smoothness of the system during operation.

[0020] Fifth, the second gear, second rotating shaft, second screw rod and support plate structures of the present invention can support the locking rod, further ensuring the supporting effect on the weight sensor, and avoiding the problem of the weight sensor moving downward when weighing items transported in high-speed rail carriages. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural front plan view of a weighing system for high-speed rail transport items according to the present invention;

[0022] Figure 2 It is a schematic diagram of the connection structure between the first gear and the second gear of the present invention;

[0023] Figure 3 It is a schematic diagram of the connection structure between the first rotating shaft and the first screw rod of the present invention;

[0024] Figure 4 is a top plan view of the internal structure of the first gear of the present invention;

[0025] Figure 5 for Figure 1 Enlarged view of point A in the middle;

[0026] Figure 6 It is a schematic diagram of the connection structure of the rotating plate of the present invention;

[0027] Figure 7 for Figure 1 Enlarged view of point E in the middle;

[0028] Figure 8 for Figure 1 Enlarged view of point B in the middle;

[0029] Fig. 9 for Figure 1 Enlarged view of point C in the middle;

[0030] Fig.10 is a cross-sectional schematic diagram of the second push plate of the present invention;

[0031] Fig.11 for Figure 1 Enlarged view of point D in the middle.

[0032] In the figure: 1, load-bearing beam; 2, pad iron; 3, weight sensor; 4, pressure head; 5, pressure cap;

[0033] 6. Lifting assembly; 61. First screw rod; 62. First rotating shaft; 63. L-shaped cavity; 64. Extension groove; 65. Limiting slider; 66. Limiting slide groove; 67. First rack; 68. First gear; 681. Built-in cavity; 682. Rotating seat; 683. Movable teeth; 684. Torsion spring; 685. Fixed teeth; 686. Baffle;

[0034] 69, second gear; 610, second rotating shaft; 611, second screw rod; 612, support plate; 613, guide rail;

[0035] 7. Trigger assembly; 71. Fixed pressure plate; 72. L-shaped rod; 73. Transmission cavity; 74. Movable shaft; 75. Rotating plate; 76. Pushing structure; 761. First pushing rod; 762. Second pushing rod; 763. Retracting shell; 764. First inner plate; 77. Transmission slide; 78. Transmission slide; 79. Delay structure; 791. First push plate; 792. Second push plate; 793. Delay rod; 794. Delay cavity; 795. Second inner plate;

[0036] 8. Locking assembly; 81. Locking rod; 82. Contraction groove; 83. Pin groove; 84. Movable cavity; 85. Pin shaft; 86. Second rack; 87. Tension spring; 88. Third gear; 89. Third rack; 810. Support slide rod; 811. Movable push rod; 812. Movable through groove; 813. Trigger block. DETAILED DESCRIPTION

[0037] See also Figure 1-2 , the present invention provides the following technical solutions:

[0038] Specifically, it refers to a weighing system for high-speed rail transport items, including a load-bearing beam 1, a shim 2 and a weight sensor 3 arranged between the shim 2 and the load-bearing beam 1, the weight sensor 3 is provided with a pressure head 4 for bearing force, the lower surface of the load-bearing beam 1 is provided with a pressure cap 5 in contact with the pressure head 4, when in use, a transition track for the high-speed rail train is provided on the top of the load-bearing beam 1, when in use, after the high-speed rail train carriage passes through the normal track and travels on the transition track, it will apply downward pressure to the load-bearing beam 1, so that the pressure cap 5 exerts a corresponding pressure on the pressure head 4, so that the weight sensor 3 detects the pressure exerted on the pressure head 4, and therefore the weight of the transported items in the carriage can be calculated based on the detected weight minus the weight of the corresponding carriage.

[0039] The lower surface of the weight sensor 3 is provided with a lifting assembly 6 for adjusting the position of the weight sensor 3. The lifting assembly 6 includes a first screw 61, which is rotatably connected to the lower surface of the weight sensor 3. An L-shaped cavity 63 is provided inside the washer 2 on the side close to the weight sensor 3. The lower end of the first screw 61 is threaded into the vertical cavity of the L-shaped cavity 63. The lower surface of the first screw 61 is provided with a first rotating shaft 62 that can drive the first screw 61 to rotate. The lower end of the first rotating shaft 62 is rotatably connected to the bottom wall of the L-shaped cavity 63. The lower end of the first rotating shaft 62 is provided with a first gear 68 that drives the first rotating shaft 62 to rotate unidirectionally. The bottom wall of the L-shaped cavity 63 is provided with a guide rail 613, and a first rack 67 meshing with the first gear 68 is slidably connected to the guide rail 613. A trigger assembly 7 for controlling the displacement of the first rack 67 is provided on the pressure head 4. During long-term use, when the top surface of the pressure head 4 is pressed out of a depression The trigger assembly 7 controls the displacement of the first rack 67 on the guide rail 613, so that the first rack 67 synchronously drives the first gear 68 to rotate. Therefore, the first shaft 62 rotates unidirectionally with the first gear 68, and the first screw 61 rotates synchronously with the first shaft 62. Since the first screw 61 and the washer 2 are threadedly connected, the first screw 61 drives the weight sensor 3 and the pressure head 4 to move upward as a whole under the transmission of the thread, so that the pressure head 4 part contacts the pressure cap 5 again. The position of the weight sensor 3 can be adjusted by thread drive, and the gap between the pressure head 4 and the pressure cap 5 is avoided as much as possible, thereby ensuring the accuracy of the weight detection of the transported items in the high-speed rail vehicle in the later stage, and further ensuring the stability of the weighing system. At the same time, the thread adjustment has a self-locking effect, so that the weight sensor 3 will not slide downward after being adjusted upward, thereby ensuring the stability of the weight sensor 3 during weighing.

[0040] See also Figure 3Specifically, an extension groove 64 is provided on the lower surface of the first screw 61, and the upper end of the first rotating shaft 62 extends into the extension groove 64 and slides in the extension groove 64. Restriction grooves 66 extending from the lower surface of the first screw 61 are provided on the inner walls on both sides of the extension groove 64. A restriction slider 65 sliding in the restriction groove 66 is provided on the outer surface of the first rotating shaft 62 close to the restriction groove 66. In this way, when the first rotating shaft 62 rotates, the first screw 61 rotates synchronously with the first rotating shaft 62 under the push of the restriction slider 65. When the first screw 61 pushes the weight sensor 3 to move upward, the first screw 61 slides upward on the surface of the first rotating shaft 62 through the extension groove 64. Through the above structure, the first screw 61 can also be displaced upward without affecting the first rotating shaft 62 driving the first screw 61 to rotate.

[0041] See also Figure 4 Specifically, the first gear 68 is rotatably sleeved on the outer surface of the first rotating shaft 62, and a built-in cavity 681 is opened in the first gear 68. The first rotating shaft 62 is located at the center of the built-in cavity 681. The first rotating shaft 62 is located on the outer surface of the built-in cavity 681 and is provided with a plurality of rotating seats 682 arranged in a circumferential array. The rotating seat 682 is rotatably connected with a movable tooth 683. A torsion spring 684 is provided between the movable tooth 683 and the rotating seat 682. The movable tooth 683 is kept vertical with the rotating seat 682 under the action of the torsion spring 684. A baffle 686 is provided on the side of the rotating seat 682 to block one side of the movable tooth 683. The position of the baffle 686 can be set according to the ascending rotation direction of the first screw 61. A plurality of meshing and connecting members engaged with the movable tooth 683 are provided on the inner wall of the built-in cavity 681. The fixed teeth 685 are connected to the first gear 68, so when the first gear 68 rotates counterclockwise, the fixed teeth 685 rotates synchronously with the first gear 68, so that the fixed teeth 685 will form a thrust on the movable teeth 683. Since the movable teeth 683 are blocked by the baffle 686, the first shaft 62 can be driven to rotate synchronously. When the first gear 68 rotates clockwise, the fixed teeth 685 form a thrust on the movable teeth 683. Since the baffle 686 cannot block the movable teeth 683, the movable teeth 683 rotates on the rotating seat 682. At the same time, the torsion spring 684 is deformed, so it cannot drive the first shaft 62 to rotate. The above-mentioned one-way driving structure is used to avoid the problem that when the first rack 67 moves back and forth, the first screw rod 61 is driven to drive the weight sensor 3 to move downward.

[0042] See also Figure 5-7Specifically, the trigger assembly 7 includes a fixed pressure plate 71, which is arranged on the top of the pressure head 4 and contacts the lower surface of the pressure cap 5. Therefore, when the top of the pressure head 4 is pressed and recessed, the fixed pressure plate 71 moves in the recessed direction of the pressure head 4. A transmission cavity 73 is opened in the load-bearing beam 1, and an L-shaped rod 72 is arranged on the side of the fixed pressure plate 71. The upper end of the vertical rod of the L-shaped rod 72 slides into the transmission cavity 73. A movable shaft 74 is rotatably connected between the inner walls on both sides of the transmission cavity 73. A rotating plate 75 is sleeved on the outer surface of the movable shaft 74. The movable shaft 74 is located at the center of the rotating plate 75. A pushing structure is arranged on the side of the rotating plate 75 away from the L-shaped rod 72. 76, transmission slide grooves 77 are provided on both sides of the rotating plate 75, and transmission slide rods 78 are provided on the side of the pushing structure 76 and the vertical rod of the L-shaped rod 72 close to the rotating plate 75. The other end of the transmission slide rod 78 extends into the transmission slide groove 77 and slides in the transmission slide groove 77. When the top of the pressure head 4 is pressed and recessed, the load-bearing beam 1 moves upward under the action of the longitudinal limiter. Since the L-shaped rod 72 is connected to the pressure head 4, the position of the L-shaped rod 72 remains stationary. In this way, the upper end of the L-shaped rod 72 will form a downward pulling force on one side of the rotating plate 75, and the other side of the rotating plate 75 will form an upward thrust on the pushing structure 76, causing the pushing structure 76 to move upward.

[0043] The push structure 76 includes a first push rod 761, which is arranged in the transmission cavity 73 and connected to the transmission slide rod 78. The lower end of the first push rod 761 slides through the lower surface of the load-bearing beam 1, and the lower end of the first push rod 761 is provided with a second push rod 762, and the lower end of the second push rod 762 slides into the L-shaped cavity 63. A delay structure 79 is provided between the second push rod 762 and the first rack 67, and a contraction shell 763 is provided at the upper end of the second push rod 762. The lower end of the first push rod 761 slides into the contraction shell 763, and the first push rod 761 The lower end is provided with a first inner plate 764 that slides in the shrinking shell 763 and contacts the top wall of the shrinking shell 763. When the load-bearing beam 1 presses the top of the pressure head 4 into a depression, since the EMU is still on the transition track, the load-bearing beam 1 will move downward synchronously. At this time, the first push rod 761 pushes the first inner plate 764 to slide downward in the shrinking shell 763. This method avoids the problem of breaking the push structure 76 as much as possible. When the load-bearing beam 1 moves upward under the action of the longitudinal limiter, the rotating plate 75 drives the first push rod 761 to move upward. At the same time, the first inner plate 764 moves upward in the shrinking shell 763. When the first inner plate 764 contacts the top wall of the shrink shell 763, the first push rod 761 will synchronously drive the second push rod 762 to move upward. At this time, the second push rod 762 will form a pulling force on the delay structure 79. The delay structure 79 synchronously pulls the first rack 67 to move on the guide rail 613, so that the first rack 67 meshes and drives the first screw 61 to rotate counterclockwise, thereby pushing the weight sensor 3 and the pressure head 4 to move upward, and making the fixed pressure plate 71 contact with the pressure cap 5 again. During the upward movement of the fixed pressure plate 71, the L-shaped rod 72 pushes the rotating plate 75 to move clockwise. The first gear 68 is driven by the first toothed wheel 72 to rotate in the clockwise direction, and the first toothed wheel 72 is driven by the first toothed wheel 72 to rotate in the clockwise direction. The first toothed wheel 72 is driven by the first toothed wheel 72 to rotate in the clockwise direction, and the first toothed wheel 72 is driven by the second toothed wheel 72 to rotate in the clockwise direction. The first toothed wheel 72 is driven by the first toothed wheel 72 to rotate in the clockwise direction, and the first toothed wheel 72 is driven by the first toothed wheel 72 to rotate in the clockwise direction. The first toothed wheel 72 is driven by the first toothed wheel 72 to rotate in the clockwise direction, and the weight sensor 3 is driven to move upward, so as to achieve the purpose of automatic control without the need for manual control and manual monitoring, and to avoid the influence of human errors on the accuracy of weighing the items transported by the high-speed rail.

[0044] See also Figure 8-9The locking assembly 8 includes a locking rod 81, which is arranged on the lower surface of the weight sensor 3. A contraction groove 82 is provided on the upper surface of the pad iron 2, which is adapted to the locking rod 81. The lower end of the locking rod 81 extends into the contraction groove 82 and slides in the contraction groove 82. An active cavity 84 is provided in the pad iron 2. A plurality of vertically arranged pin grooves 83 are provided on the side surface of the locking rod 81 facing the active cavity 84. A pin shaft 85 with one end sliding into the contraction groove 82 is provided in the active cavity 84. One end of the pin shaft 85 located in the contraction groove 82 is adapted to the pin groove 83. Therefore, when the pin shaft 85 is inserted into the pin groove 83, the pin shaft 85 can form a restricting effect on the locking rod 81, thereby preventing the locking rod 81 from sliding downward in the contraction groove 82, thereby achieving the purpose of multiple supports for the weight sensor 3, and further ensuring the stability and firmness of the weight sensor 3 after adjusting the height.

[0045] One end of the pin shaft 85 located in the movable cavity 84 is provided with a second rack 86 sliding on the bottom wall of the movable cavity 84, and a tension spring 87 movably sleeved on the outer surface of the pin shaft 85 is provided between the second rack 86 and the movable cavity 84. When the tension spring 87 is not affected by the tension force, the tension spring 87 will form a tension force on the second rack 86, so that the initial position of the second rack 86 is close to the side of the contraction groove 82, and therefore the initial position of the pin shaft 85 is extending into the pin groove 83.

[0046] The inner wall of the movable cavity 84 is rotatably connected with a third gear 88 meshing with the second rack 86, and the upper side of the third gear 88 is meshingly connected with a third rack 89. A support slide bar 810 is provided between the left and right inner walls of the movable cavity 84. The third rack 89 is slidably sleeved on the outer surface of the support slide bar 810. The top wall of the movable cavity 84 is provided with a movable through groove 812 extending from the upper surface of the washer 2. The upper surface of the third rack 89 is provided with an L-shaped movable push rod 811. The vertical rod of the movable push rod 811 extends out of the upper surface of the pad iron 2 through the movable through groove 812 and slides in the movable through groove 812. The outer surface of the second push rod 762 facing the movable push rod 811 is provided with a trigger block 813, and the trigger block 813 also slides through the L-shaped cavity 63. The upper side of the trigger block 813 is an inclined surface. The end of the horizontal rod of the movable push rod 811 away from the vertical rod contacts the inclined surface of the trigger block 813 and the side surface facing away from the second push rod 762. When the second push rod 762 is moved upward, the trigger block 813 is moved upward synchronously with the second push rod 762, so that the inclined surface of the trigger block 813 will squeeze the movable push rod 811, causing the movable push rod 811 to move to the side away from the second push rod 762. At this time, the movable push rod 811 pushes the third rack 89 to move to the side away from the second push rod 762, and the third gear 88 rotates counterclockwise under the transmission of the third rack 89. The third gear 88 synchronously meshes and transmits the second rack 86 to move to the side away from the locking rod 81, so that the pin shaft 85 moves out of the pin groove 83. The above structure can automatically unlock the locking rod 81 when the height of the weight sensor 3 needs to be adjusted upward, and the problem that the locking rod 81 is restricted by the pin shaft 85 and the weight sensor 3 cannot move upward and is stuck is avoided as much as possible, thereby ensuring the smoothness of the weighing system during operation.

[0047] See also Fig.10Specifically, the delay structure 79 includes a first push plate 791 and a second push plate 792. The side of the first push plate 791 away from the second push plate 792 is hinged to the lower end of the second push rod 762, and the side of the second push plate 792 away from the first push plate 791 is hinged to the first rack 67. A delay rod 793 is provided on the side of the first push plate 791 close to the second push plate 792. A delay cavity 794 is provided in the second push plate 792. The other end of the delay rod 793 slides into the delay cavity 794. The end of the delay rod 793 located in the delay cavity 794 is provided with a second inner plate 795 sliding in the delay cavity 794. The initial position of the second inner plate 795 is It contacts the left inner wall of the delay chamber 794, so that when the second push rod 762 moves upward, it first pulls the first push plate 791, so the delay rod 793 first pulls the second inner plate 795 to slide in the delay chamber 794 until it contacts the right inner wall of the delay chamber 794. Therefore, the first push plate 791 can pull the second push plate 792, so that the first rack 67 slides on the guide rail 613. Through the above structure, the unlocking action of the locking rod 81 and the rotation of the first screw 61 have a time difference, which avoids the problem that the locking rod 81 is not unlocked and the first screw 61 cannot push the weight sensor 3 to move upward, thereby further ensuring the smoothness of the system during operation.

[0048] See also Figure 1-2 and Fig.11 A second rotating shaft 610 is rotatably connected to the bottom wall of the L-shaped cavity 63, and a second gear 69 meshing with the first gear 68 is rotatably sleeved on the outer surface of the second rotating shaft 610. The connection structure between the second gear 69 and the second rotating shaft 610 is the same as the connection structure between the first gear 68 and the first rotating shaft 62. A second screw 611 is provided at the upper end of the second rotating shaft 610. The connection structure between the second screw 611 and the second rotating shaft 610 is the same as the connection structure between the first screw 61 and the first rotating shaft 62. The upper end of the second screw 611 is threadedly penetrated into the contraction groove 82, and the upper end of the second screw 611 is rotatably connected to a support plate 612 sliding in the contraction groove 82. The support plate 612 contacts the lower surface of the locking rod 81. When the first gear 68 rotates counterclockwise When the first gear 68 rotates in the clockwise direction, the second gear 69 is synchronously meshed and driven to rotate in the clockwise direction. Since a one-way driving structure is also arranged between the second gear 69 and the second rotating shaft 610, the second gear 69 cannot drive the second rotating shaft 610 to rotate when it rotates in the clockwise direction. When the first gear 68 rotates in the clockwise direction, the second gear 69 rotates in the counterclockwise direction. Therefore, the second rotating shaft 610 rotates synchronously with the second screw 611. Therefore, the second screw 611 pushes the support plate 612 upward under the transmission of the thread until it contacts the lower surface of the locking rod 81. The above structure can support the locking rod 81, further ensure the supporting effect on the weight sensor 3, and try to avoid the problem of the weight sensor 3 moving downward when weighing the items transported in the high-speed rail carriage.

[0049] The working principle of the weighing system for high-speed rail transport items provided by the present invention is as follows:

[0050] In the first step, after the high-speed train carriage passes through the normal track and travels on the transition track, it will exert downward pressure on the load-bearing beam 1, so that the pressure cap 5 exerts a corresponding pressure on the pressure head 4, so that the weight sensor 3 detects the pressure exerted on the pressure head 4 and calculates the weight of the transported items in the carriage;

[0051] Step 2: When the pressure head 4 is depressed during long-term use, the load-bearing beam 1 moves upward under the action of the longitudinal limiter. Since the L-shaped rod 72 is connected to the pressure head 4, the position of the L-shaped rod 72 remains unchanged, so that the upper end of the L-shaped rod 72 will form a downward pulling force on one side of the rotating plate 75, and the rotating plate 75 drives the first push rod 761 to move upward. At the same time, the first inner plate 764 moves upward in the shrinking shell 763. When the first inner plate 764 contacts the top wall of the shrinking shell 763, the first push rod 761 will synchronously drive the second push rod 762 to move upward.

[0052] Step 3: The trigger block 813 moves upward synchronously with the second push rod 762, so that the inclined surface of the trigger block 813 squeezes the movable push rod 811, causing the movable push rod 811 to move away from the second push rod 762. At this time, the movable push rod 811 pushes the third rack 89 to move away from the second push rod 762. The third gear 88 rotates counterclockwise under the transmission of the third rack 89. The third gear 88 synchronously meshes and drives the second rack 86 to move away from the locking rod 81, so that the pin shaft 85 moves out of the pin groove 83.

[0053] Step 4: When the second push rod 762 moves upward, it first pulls the first push plate 791, so the delay rod 793 first pulls the second inner plate 795 to slide in the delay chamber 794 until it contacts the right inner wall of the delay chamber 794. Therefore, the first push plate 791 can pull the second push plate 792, so that the first rack 67 slides on the guide rail 613, so that the first rack 67 meshes and drives the first screw 61 to rotate counterclockwise;

[0054] Step 5. When the first gear 68 rotates counterclockwise, the fixed teeth 685 rotate synchronously with the first gear 68. In this way, the fixed teeth 685 will form a thrust on the movable teeth 683. Since the movable teeth 683 are blocked by the baffle 686, the first rotating shaft 62 can be driven to rotate synchronously. The first screw 61 rotates synchronously with the first rotating shaft 62. The first screw 61 drives the weight sensor 3 and the pressure head 4 to move upward as a whole under the transmission of the thread, so that the pressure head 4 is partially in contact with the pressure cap 5 again.

[0055] Step 6: The fixed pressing plate 71 contacts the pressing cap 5 again. When the fixed pressing plate 71 moves upward, the L-shaped rod 72 pushes the rotating plate 75 to rotate clockwise, so that the rotating plate 75 gradually rotates to a horizontal state, and the first pushing rod 761 and the second pushing rod 762 move downward under the action of gravity, and the delay structure 79 pushes the first rack 67 to move back and reset. The pin shaft 85 moves into the pin groove 83 under the pull of the tension spring 87, and locks the locking rod 81 again.

[0056] Step 7. When the first rack 67 is reset, it can drive the first gear 68 to rotate clockwise and the second gear 69 to rotate counterclockwise, so the second shaft 610 and the second screw 611 rotate synchronously. Therefore, the second screw 611 pushes the support plate 612 upward under the transmission of the thread until it contacts the lower surface of the locking rod 81.

Claims

1. A weighing system for high-speed rail transport items, comprising a load-bearing beam (1), a pad iron (2), and a weight sensor (3) arranged between the pad iron (2) and the load-bearing beam (1), the weight sensor (3) being provided with a pressure head (4) for receiving force, and a pressure cap (5) in contact with the pressure head (4) being provided on the lower surface of the load-bearing beam (1), characterized in that: The lower surface of the weight sensor (3) is provided with a lifting assembly (6) for adjusting the position of the weight sensor (3), the lifting assembly (6) comprising a first screw rod (61), the first screw rod (61) being rotatably connected to the lower surface of the weight sensor (3), an L-shaped cavity (63) being provided inside the shim (2) on a side close to the weight sensor (3), the lower end thread of the first screw rod (61) penetrating into the vertical cavity of the L-shaped cavity (63), the lower surface of the first screw rod (61) being provided with a first rotating shaft (62) capable of driving the first screw rod (61) to rotate, The lower end of a rotating shaft (62) is rotatably connected to the bottom wall of the L-shaped cavity (63); a first gear (68) for driving the first rotating shaft (62) to rotate in one direction is provided at the lower end of the first rotating shaft (62); a guide rail (613) is provided on the bottom wall of the L-shaped cavity (63); a first rack (67) meshingly connected to the first gear (68) is slidably connected to the guide rail (613); a trigger component (7) for controlling the displacement of the first rack (67) is provided on the pressure head (4); and a locking component (8) for secondary support of the weight sensor (3) is provided on the lower surface of the weight sensor (3); The trigger assembly (7) comprises a fixed pressure plate (71), which is arranged on the top of the pressure head (4) and contacts the lower surface of the pressure cap (5). A transmission cavity (73) is provided in the load-bearing beam (1). An L-shaped rod (72) is provided on the side of the fixed pressure plate (71). The upper end of the vertical rod of the L-shaped rod (72) slides into the transmission cavity (73). A movable shaft (74) is rotatably connected between the inner walls of the two opposite sides of the transmission cavity (73). A rotating plate (75) is sleeved on the outer surface of the movable shaft (74). The movable shaft (74) is located at the center of the rotating plate (75). A pushing structure (76) is provided on the side of the rotating plate (75) away from the L-shaped rod (72). Transmission slide grooves (77) are provided on both sides of the rotating plate (75). The pushing structure (76) is provided on the side of the rotating plate (75) away from the L-shaped rod (72). 76) and the side of the vertical rod of the L-shaped rod (72) close to the rotating plate (75) are both provided with a transmission slide rod (78), the other end of the transmission slide rod (78) extends into the transmission slide groove (77) and slides in the transmission slide groove (77), the pushing structure (76) includes a first pushing rod (761), the first pushing rod (761) is arranged in the transmission cavity (73) and is connected to the transmission slide rod (78), the lower end of the first pushing rod (761) slides through the lower surface of the load-bearing beam (1), the lower end of the first pushing rod (761) is provided with a second pushing rod (762), the lower end of the second pushing rod (762) slides through the L-shaped cavity (63), and a delay structure (79) is provided between the second pushing rod (762) and the first rack (67); The locking assembly (8) comprises a locking rod (81), the locking rod (81) being arranged on the lower surface of the weight sensor (3), the upper surface of the pad iron (2) being provided with a contraction groove (82) adapted to the locking rod (81), the lower end of the locking rod (81) extending into the contraction groove (82) and sliding in the contraction groove (82), the pad iron (2) being provided with an active cavity (84), and a plurality of vertically arranged pin grooves being provided on a side surface of the locking rod (81) facing the active cavity (84) (83), a pin shaft (85) having one end slidingly penetrating into the contraction groove (82) is arranged in the movable cavity (84), one end of the pin shaft (85) located in the contraction groove (82) is adapted to the pin groove (83), one end of the pin shaft (85) located in the movable cavity (84) is provided with a second rack (86) sliding on the bottom wall of the movable cavity (84), and a tension spring (87) movably sleeved on the outer surface of the pin shaft (85) is arranged between the second rack (86) and the movable cavity (84).

2. A weighing system for high-speed rail transport items according to claim 1, characterized in that: An extension groove (64) is formed on the lower surface of the first screw rod (61), and the upper end of the first rotating shaft (62) extends into the extension groove (64) and slides in the extension groove (64). Restriction sliding grooves (66) extending from the lower surface of the first screw rod (61) are formed on the inner walls on both sides opposite to each other, and a restriction sliding block (65) sliding in the restriction sliding groove (66) is provided on the outer surface of the first rotating shaft (62) near the restriction sliding groove (66).

3. A weighing system for high-speed rail transport items according to claim 2, characterized in that: The first gear (68) is rotatably sleeved on the outer surface of the first rotating shaft (62), and an inner cavity (681) is provided in the first gear (68). A plurality of rotating seats (682) arranged in a circumferential array are provided on the outer surface of the inner cavity (681) of the first rotating shaft (62), and movable teeth (683) are rotatably connected to the rotating seats (682). A torsion spring (684) is provided between the movable teeth (683) and the rotating seats (682). Under the action of the torsion spring (684), the movable teeth (683) are kept vertically relative to the rotating seats (682), and a baffle (686) is provided on the side of the rotating seats (682) to block one side of the movable teeth (683). A plurality of fixed teeth (685) meshingly connected with the movable teeth (683) are provided on the inner wall of the inner cavity (681).

4. A weighing system for high-speed rail transport items according to claim 3, characterized in that: The upper end of the second push rod (762) is provided with a retractable shell (763), the lower end of the first push rod (761) slides into the retractable shell (763), and the lower end of the first push rod (761) is provided with a first inner plate (764) that slides in the retractable shell (763) and contacts the top wall of the retractable shell (763).

5. A weighing system for high-speed rail transport items according to claim 4, characterized in that: A third gear (88) meshingly connected to the second rack (86) is rotatably connected to the inner wall of the movable cavity (84); a third rack (89) is meshingly connected to the upper side of the third gear (88); a support slide bar (810) is provided between the left and right inner walls of the movable cavity (84); the third rack (89) is slidably sleeved on the outer surface of the support slide bar (810); a movable through groove (812) extending from the upper surface of the washer (2) is provided on the top wall of the movable cavity (84); an L-shaped movable push rod (810) is provided on the upper surface of the third rack (89). 11), the vertical rod of the movable push rod (811) extends out of the upper surface of the pad iron (2) through the movable through groove (812) and slides in the movable through groove (812), and the second push rod (762) is provided with a trigger block (813) on the outer surface facing the movable push rod (811), and the trigger block (813) also slides into the L-shaped cavity (63), the upper side of the trigger block (813) is an inclined surface, and the end of the cross rod of the movable push rod (811) away from the vertical rod is in contact with the inclined surface of the trigger block (813) and the side surface facing away from the second push rod (762).

6. A weighing system for high-speed rail transport items according to claim 5, characterized in that: The delay structure (79) comprises a first push plate (791) and a second push plate (792); a side of the first push plate (791) away from the second push plate (792) is hinged to the lower end of the second push rod (762); a side of the second push plate (792) away from the first push plate (791) is hinged to the first rack (67); a delay rod (793) is provided on the side of the first push plate (791) close to the second push plate (792); a delay cavity (794) is provided in the second push plate (792); the other end of the delay rod (793) slides through the delay cavity (794); a second inner plate (795) sliding in the delay cavity (794) is provided at one end of the delay rod (793) located in the delay cavity (794); the initial position of the second inner plate (795) is in contact with the left inner wall of the delay cavity (794).

7. A weighing system for high-speed rail transport items according to claim 6, characterized in that: A second rotating shaft (610) is rotatably connected to the bottom wall of the L-shaped cavity (63); a second gear (69) meshingly connected to the first gear (68) is rotatably sleeved on the outer surface of the second rotating shaft (610); the connection structure between the second gear (69) and the second rotating shaft (610) is the same as the connection structure between the first gear (68) and the first rotating shaft (62); a second screw rod (611) is provided at the upper end of the second rotating shaft (610); the connection structure between the second screw rod (611) and the second rotating shaft (610) is the same as the connection structure between the first screw rod (61) and the first rotating shaft (62); the upper end of the second screw rod (611) is threadedly inserted into the contraction groove (82); the upper end of the second screw rod (611) is rotatably connected to a support plate (612) that slides in the contraction groove (82); the support plate (612) contacts the lower surface of the locking rod (81).

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