Pre-compression device for axle box spring set

Abstract

The invention provides an axle box spring set pre-compression device, belongs to the technical field of rail transit, and aims to solve the problem that in the prior art, when batch axle box springs are pre-compressed, workers need to push the axle box springs to the position below a pressing head one by one for compression. Comprising a circular truncated cone, a guide plate is arranged on the edge of the circular truncated cone, the middle of the circular truncated cone is rotatably connected with a turntable, the turntable is driven by a motor, and a plurality of arc notches are formed in the side wall of the turntable and matched with the guide plate; one side of the circular table communicates with a first conveying belt; a mounting plate is supported above the circular truncated cone through a support, an air cylinder is arranged on the mounting plate, a piston rod of the air cylinder is connected with a pressing head, a pressing block is arranged on the inner wall of the pressing head, and an opening is formed in the side wall of the pressing head in a penetrating mode. According to the axle box spring compression device, through the arrangement of the first conveying belt, the circular truncated cone, the rotary disc and the arc notch, axle box springs can be continuously conveyed to the position below the pressing head to be compressed, manual conveying is not needed, the labor cost is saved, and the automation degree is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of rail transportation, and in particular relates to an axle box spring group pre-compression device. Background Art

[0002] The axle box spring group is a vibration reduction device for the bogie of a locomotive vehicle and is one of the key components of the bogie. The axle box spring group of the bogie of Chengdu Metro Line 6 adopts a double helical spring group structure. The axle box spring group consists of two nested helical spring groups, upper and lower spring clamps, etc. It mainly bears the vertical load of the frame and isolates the vibration from the track.

[0003] The pre-compression of the axle box spring group is to compress the spring group from the free height to the working height by external force, and then use process bolts to assemble the upper and lower clamps, insulation cover and pad into a whole. Since the stiffness of the axle box spring group reaches 1304N / mm, pre-compression is difficult and there are safety hazards. It cannot be compressed by manpower alone.

[0004] At present, the invention patent with patent number CN201910755196.8 discloses an axle box spring group pre-compression device, which uses a scooter to transport a single axle box spring to the bottom of the pressure head for compression;

[0005] The prior art has the following deficiencies:

[0006] When batches of axle box springs are pre-compressed, workers are required to push the axle box springs one by one under the pressure head for compression, which results in high work intensity and low degree of automation. Summary of the invention

[0007] In view of this, the present invention provides an axle box spring group pre-compression device to solve the problems in the prior art that when batches of axle box springs are pre-compressed, workers are required to push the axle box springs one by one under the pressure head for compression, which results in high work intensity and low degree of automation.

[0008] The technical solution adopted by the present invention is as follows:

[0009] A pre-compression device for an axle box spring group comprises a truncated cone, the edge of the truncated cone is provided with a guide plate, the guide plate is arranged along the circumference of the truncated cone, the middle part of the truncated cone is rotatably connected to a turntable, the turntable is driven by a motor, a plurality of arc notches are provided on the side wall of the turntable, the plurality of arc notches are arranged at equal intervals along the circumference of the turntable, the arc notches cooperate with the guide plate; a first conveyor belt is connected to one side of the truncated cone, the first conveyor belt conveys the axle box spring into the truncated cone; a mounting plate is supported by a bracket above the truncated cone, a cylinder is provided on the mounting plate, a pressure head is connected to the piston rod of the cylinder, a pressure block is provided on the inner wall of the pressure head, the pressure block is arranged along the circumference of the pressure head, and the outer diameter of the pressure block matches the diameter of the axle box spring, an opening is penetrated through the side wall of the pressure head.

[0010] In this technical solution, it should be noted that the guide plate is an arc-shaped plate structure, the distance between the guide plate and the arc notch is equivalent to the diameter of the axle box spring, the pressure head is located directly above one of the arc notches, and an infrared sensor is arranged on the pressure head to sense the axle box spring; in this solution, when it is necessary to pre-compress a batch of axle box springs, a plurality of axle box springs are placed on the first conveyor belt, the first conveyor drives the axle box spring to move in the direction close to the truncated table, and conveys an axle box spring into the arc notch, at which time the motor drives the turntable to rotate, after the turntable rotates, the axle box spring is conveyed to the bottom of the pressure head through the arc notch, and then the cylinder is started to drive the pressure head to move downward, and the pressure head The pressure block inside abuts against the top of the axle box spring and compresses the axle box spring. When the axle box spring is compressed to the working height, the staff screws the bolts into the upper and lower clamping plates of the axle box spring through the opening set on the side wall of the pressure head, so as to keep the axle box spring group at the working height. When the compression of the axle box spring is completed, the cylinder drives the pressure head to reset, and the turntable rotates again to convey the next axle box spring to the bottom of the pressure head for pre-compression. In summary, in the present invention, through the first conveyor belt, frustum, turntable and circular arc notch, the axle box springs can be successively conveyed to the bottom of the pressure head for compression, without the need for manual conveying, thus saving labor costs and improving the degree of automation.

[0011] Preferably, one side of the circular table is also connected to a second conveyor belt, the second conveyor belt is arranged side by side with the first conveyor belt, and the turntable conveys the axle box spring on the circular table to the second conveyor belt.

[0012] In this technical solution, it should be noted that the second conveyor belt is set up to recover the compressed axle box spring, that is, after the pre-compression of the axle box spring is completed, the compressed axle box spring is transferred to the second conveyor belt through the rotation of the turntable, and the second conveyor belt transfers the axle box spring to the other end for easy collection by the staff.

[0013] Preferably, a cover body is provided at the bottom of the pressure head, the outer shell of the cover body has a cavity, a plurality of air outlet holes connected to the cavity are penetrated on the inner wall of the cover body, a gas tank is provided on the bracket, the gas tank is filled with hot gas, the gas tank is connected to the cavity through an air outlet pipe, and a power device is provided on the gas tank, the power device is used to provide pressure to the gas tank to transport the hot gas in the gas tank into the cavity; the cover body is a retractable structure.

[0014] In this technical solution, it should be noted that the axle box spring needs to undergo a hot-installed snow cover process on the periphery, that is, after the snow cover is put on the periphery of the axle box spring, the snow cover is heated so that the snow cover shrinks and deforms due to the heat and then tightly adheres to the outer ring of the axle box spring; based on this, the present invention provides a cover body at the bottom of the pressure head, the cover body is a retractable structure, and a cavity is provided inside the cover body. When the axle box spring is transported to the bottom of the pressure head through a turntable, the cylinder drives the pressure head to descend, and the cover body descends synchronously with the pressure head. When the cover body surrounds the axle box spring, the hot air in the gas tank is transported into the cavity through a power device. , the hot air acts on the snow cover through the air outlet, so that the snow cover shrinks and deforms due to the heat, and then it is tightly attached to the outer ring of the axle box spring. When the snow cover is hot-installed, the compression of the axle box spring is carried out, that is, the cylinder is started again, and the cylinder continues to drive the pressure head and the snow cover to descend. At this time, the cover body adapts to the compression length of the axle box spring through the telescopic structure (because the distance between the bottom of the cover body and the truncated cone is already very small or has already contacted when the cover body heats the axle box spring, so after the pressure head continues to descend, the cover body needs to be provided with a telescopic structure to offset the distance that the pressure head continues to descend, so as to avoid motion interference). In summary, in the present invention, by arranging the cover body on the pressure head, the snow cover of the axle box spring can be heated by the cover body before the pressure head pre-compresses the axle box spring, so that the snow cover shrinks and deforms due to the heat, and then it is tightly attached to the outer ring of the axle box spring. Secondly, the cover body is a telescopic structure, which can adapt to the compression distance of the axle box spring through its own telescopic structure, and no motion interference will occur.

[0015] Preferably, the gas tank is arranged parallel to the pressure head, and the power device includes a linkage rod, a piston rod and a piston. The piston is slidably embedded in the gas tank, one end of the piston rod is connected to the top of the piston, and the other end slides out of the gas tank to be connected to the linkage rod. The end of the linkage rod away from the piston rod is fixedly connected to the cover body.

[0016] In this technical solution, it should be noted that the power device specifically includes a linkage rod, a piston rod and a piston. When the turntable transports the axle box spring to the bottom of the pressure head, the cylinder drives the pressure head to descend, and the cover body descends synchronously with the pressure head, and the linkage rod descends synchronously with the cover body. The descent of the linkage rod drives the piston rod to descend, and the descent of the piston rod drives the piston to descend. The descent of the piston compresses the hot air in the gas tank, so that the hot air is pressed into the outlet pipe and ejected from the outlet hole, acting on the snow cover.

[0017] Preferably, a heating box is provided on the bracket, and the heating box is connected to the gas tank through an air inlet pipe, and the connecting point between the air inlet pipe and the gas tank, and the connecting point between the air outlet pipe and the gas tank are both located at the bottom of the side wall of the gas tank, and a first one-way valve is provided at the connecting point between the air inlet pipe and the gas tank, and a second one-way valve is provided at the connecting point between the air outlet pipe and the gas tank.

[0018] In this technical solution, it should be noted that after the turntable transports the axle box spring to the bottom of the pressure head, the cylinder drives the pressure head to descend, the cover body descends synchronously with the pressure head, and the linkage rod descends synchronously with the cover body. The descent of the linkage rod drives the piston rod to descend, and the descent of the piston rod drives the piston to descend. The descent of the piston compresses the hot gas in the gas tank, so that the hot gas opens the second one-way valve through pressure (the first one-way valve is closed), and the hot gas enters the air outlet pipe and is ejected from the air outlet, acting on the snow cover to complete the hot installation of the snow cover, and then continues to start the cylinder to drive the pressure head to descend, Compression. During the compression process, hot air will still be ejected from the air outlet. Therefore, after the axle box spring is compressed to the working length and the hot air around the axle box spring cools down, the staff will screw the bolts into the upper and lower clamping plates of the axle box spring to keep the axle box spring group at the working height. After the compression of the axle box spring is completed, the cylinder drives the pressure head to rise and reset. During the rising process, the linkage rod drives the piston rod and the piston to rise. The rising piston causes the gas tank to generate suction, which in turn causes the first one-way valve to open, and the hot air in the heating box is sucked into the gas tank to prepare for the next hot installation. In summary, in the present invention, by providing a first one-way valve, a heating box and a second one-way valve, the piston in the gas tank can absorb the hot air in the heating box during the rising process, and the piston can release the hot air to the snow cover during the descending process.

[0019] Preferably, the cover body includes a fixed cover and a telescopic cover, the top of the fixed cover is fixedly connected to the pressure head, and the top of the telescopic cover is slidably inserted into the fixed cover from the bottom of the fixed cover. A first limit platform is provided at the top of the side wall of the telescopic cover, the first limit platform is arranged along the circumference of the telescopic shaft, the first limit platform is slidably connected to the fixed cover, and a second limit platform is provided at the bottom opening of the fixed cover, and the second limit platform is arranged opposite to the first limit platform.

[0020] In this technical solution, it should be noted that the cover body is an inserted telescopic structure, and the first limit platform and the second limit platform are provided to limit the telescopic cover to prevent it from falling off from the bottom of the fixed cover.

[0021] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0022] 1. In the present invention, the axle box spring can be successively conveyed to the bottom of the pressure head for compression by means of the first conveyor belt, the round table, the turntable and the circular arc notch, without the need for manual conveying, thus saving labor costs and improving the degree of automation;

[0023] 2. In the present invention, by arranging the cover body on the pressure head, the snow cover of the axle box spring can be heated by the cover body before the pressure head pre-compresses the axle box spring, so that the snow cover shrinks and deforms due to heat and is closely attached to the outer ring of the axle box spring. Secondly, the cover body is a telescopic structure, which can adapt to the compression distance of the axle box spring by its own telescoping, and no motion interference occurs;

[0024] 3. In the present invention, the power device specifically includes a linkage rod, a piston rod and a piston. When the turntable conveys the axle box spring to the bottom of the pressure head, the cylinder drives the pressure head to descend, the cover body follows the pressure head to descend synchronously, and the linkage rod follows the cover body to descend synchronously. The descent of the linkage rod drives the piston rod to descend, and the descent of the piston rod drives the piston to descend. The descent of the piston compresses the hot gas in the gas tank, so that the hot gas is pressed into the outlet pipe and ejected from the outlet hole to act on the snow cover;

[0025] 4. In the present invention, by providing a first one-way valve, a heating box and a second one-way valve, the piston in the gas tank can absorb the hot air in the heating box during the rising process, and the piston can release the hot air to act on the snow cover during the descending process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will now be described by way of example with reference to the accompanying drawings, in which:

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the three-dimensional structure when the axle box springs are less in the present invention;

[0029] Figure 3 It is a rear-view stereoscopic structural schematic diagram of the present invention;

[0030] Figure 4 It is a schematic diagram of the three-dimensional structure of the cylinder, pressure head, cover body, power device, gas tank and heating box of the present invention;

[0031] Figure 5 It is a schematic diagram of the three-dimensional structure after the pressure head and the cover body of the present invention are separated;

[0032] Figure 6 It is a schematic diagram of the cross-sectional three-dimensional structure of the cover body of the present invention;

[0033] Figure 7 It is a schematic diagram of the cross-sectional three-dimensional structure of the gas tank of the present invention;

[0034] Figure 8 It is a schematic diagram of the split three-dimensional structure of the axle box spring of the present invention;

[0035] Wherein: 1-first conveyor belt, 2-second conveyor belt, 3-axle box spring, 31-upper clamp, 32-lower clamp, 33-snow cover, 4-round table, 5-guide plate, 6-disc, 7-arc notch, 8-bracket, 9-mounting plate, 10-cylinder, 11-pressure head, 111-pressure block, 112-opening, 12-cover body, 121-fixed cover, 122-telescopic cover, 123-air outlet, 124-cavity, 13-gas tank, 131-piston, 132-first one-way valve, 133-second one-way valve, 14-air outlet pipe, 15-linkage rod, 16-piston rod, 17-heating box, 18-air inlet pipe. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0039] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0040] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0041] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0042] Example

[0043] like Figure 1-8As shown, an embodiment of the present invention discloses a pre-compression device for three groups of axle box springs, comprising a truncated cone 4, an edge of which is provided with a guide plate 5, the guide plate 5 being arranged along the circumference of the truncated cone 4, a middle part of the truncated cone 4 being rotatably connected with a turntable, the turntable being driven by a motor, a side wall of the turntable being provided with a plurality of arc notches 7, the plurality of arc notches 7 being arranged at equal intervals along the circumference of the turntable, the arc notches 7 cooperating with the guide plate 5; a first conveyor belt 1 is connected to one side of the truncated cone 4, the first conveyor belt 1 conveys the axle box spring 3 into the truncated cone 4; a mounting plate 9 is supported above the truncated cone 4 by a bracket 8, a cylinder 10 is arranged on the mounting plate 9, a piston rod 16 of the cylinder 10 is connected with a pressure head 11, a pressure block 111 is arranged on the inner wall of the pressure head 11, the pressure block 111 is arranged along the circumference of the pressure head 11, and the outer diameter of the pressure block 111 matches the diameter of the axle box spring 3, an opening 112 is penetrated through the side wall of the pressure head 11. It should be noted that the guide plate 5 is an arc-shaped plate structure, and the distance between the guide plate 5 and the arc notch 7 is equivalent to the diameter of the axle box spring 3. The pressure head 11 is located directly above one of the arc notches 7, and an infrared sensor is arranged on the pressure head 11 to sense the axle box spring 3. In this scheme, when it is necessary to pre-compress a batch of axle box springs 3, a plurality of axle box springs 3 are placed on the first conveyor belt 1, and the first conveyor belt 1 drives the axle box spring 3 to move toward the direction close to the truncated table 4, and conveys an axle box spring 3 into the arc notch 7. At this time, the motor drives the turntable to rotate. After the turntable rotates, the axle box spring 3 is conveyed to the bottom of the pressure head 11 through the arc notch 7, and then the cylinder 10 is started to drive the pressure head 11 to move downward, and the pressure block 1 in the pressure head 11 11 abuts against the top of the axle box spring 3 and compresses the axle box spring 3. When the axle box spring 3 is compressed to the working height, the staff screws the bolts into the upper clamping plate 31 and the lower clamping plate 32 of the axle box spring 3 through the opening 112 set on the side wall of the pressure head 11, so that the axle box spring 3 group is maintained at the working height. When the compression of the axle box spring 3 is completed, the cylinder 10 drives the pressure head 11 to reset, and the turntable rotates again to convey the next axle box spring 3 to the bottom of the pressure head 11 for pre-compression; in summary, in the present invention, through the first conveyor belt 1, the truncated table 4, the turntable and the arc notch 7, the axle box spring 3 can be conveyed to the bottom of the pressure head 11 for compression one by one, without the need for manual conveying, thus saving labor costs and improving the degree of automation.

[0044] like Figure 1As shown, in this embodiment, one side of the truncated table 4 is also connected to the second conveyor belt 2, and the second conveyor belt 2 is arranged side by side with the first conveyor belt 1, and the turntable conveys the axle box spring 3 on the truncated table 4 to the second conveyor belt 2. It should be noted that the second conveyor belt 2 is used to recover the compressed axle box spring 3, that is, after the pre-compression of the axle box spring 3 is completed, the compressed axle box spring 3 is transferred to the second conveyor belt 2 through the rotation of the turntable, and the second conveyor belt 2 transfers the axle box spring 3 to the other end for easy collection by the staff.

[0045] like Figure 5-Figure 7As shown, in this embodiment, a cover body 12 is provided at the bottom of the pressure head 11, and the outer shell of the cover body 12 has a cavity 124. A plurality of air outlet holes 123 connected to the cavity 124 are penetrated on the inner wall of the cover body 12. A gas tank 13 is provided on the bracket 8. The gas tank 13 is filled with hot gas. The gas tank 13 is connected to the cavity 124 through an air outlet pipe 14, and a power device is provided on the gas tank 13. The power device is used to provide pressure to the gas tank 13 to transport the hot gas in the gas tank 13 to the cavity 124; the cover body 12 is a retractable structure. It should be noted that the axle box spring 3 needs to be subjected to a process of hot-fitting the snow cover 33 on the periphery, that is, after the snow cover 33 is sleeved on the periphery of the axle box spring 3, the snow cover 33 is heated so that the snow cover 33 shrinks and deforms due to the heat, and then is tightly attached to the outer ring of the axle box spring 3; based on this, the present invention is provided with a cover body 12 at the bottom of the pressure head 11, the cover body 12 is a retractable structure, and a cavity 124 is provided in the cover body 12, when the axle box spring 3 is transported to the bottom of the pressure head 11 through the turntable, the cylinder 10 drives the pressure head 11 to descend, and the cover body 12 descends synchronously with the pressure head 11, and when the cover body 12 surrounds the axle box spring 3, the hot air in the gas tank 13 is transported to the cavity 124 through the power device. Inside, the hot air acts on the snow cover 33 through the air outlet 123, so that the snow cover 33 shrinks and deforms due to the heat, and then adheres tightly to the outer ring of the axle box spring 3. When the snow cover 33 is hot-installed, the compression of the axle box spring 3 is carried out, that is, the cylinder 10 is started again, and the cylinder 10 continues to drive the pressure head 11 and the snow cover 33 to descend. At this time, the cover body 12 adapts to the compression length of the axle box spring 3 through the telescopic structure set (because the distance between the bottom of the cover body 12 and the truncated cone 4 is already very small or has already contacted when the cover body 12 heats the axle box spring 3, so after the pressure head 11 continues to descend, the cover body 12 needs to be provided with a telescopic structure to offset the distance that the pressure head 11 continues to descend, so as to avoid motion interference). To summarize, in the present invention, by arranging the cover body 12 on the pressure head 11, the snow cover 33 of the axle box spring 3 can be heated by the cover body 12 before the pressure head 11 pre-compresses the axle box spring 3, so that the snow cover 33 is tightly attached to the outer ring of the axle box spring 3 after shrinking and deforming due to the heat. Secondly, the cover body 12 is a retractable structure, which can adapt to the compression distance of the axle box spring 3 through its own expansion and contraction, and no movement interference will occur.

[0046] like Figure 4 , Figure 5 and Figure 7As shown, in this embodiment, the gas tank 13 is arranged parallel to the pressure head 11, and the power device includes a linkage rod 15, a piston rod 16 and a piston 131. The piston 131 is slidably embedded in the gas tank 13, one end of the piston rod 16 is connected to the top of the piston 131, and the other end slides out of the gas tank 13 to be connected to the linkage rod 15, and the end of the linkage rod 15 away from the piston rod 16 is fixedly connected to the cover body 12. It should be noted that the power device specifically includes a linkage rod 15, a piston rod 16 and a piston 131. When the turntable transports the axle box spring 3 to the bottom of the pressure head 11, the cylinder 10 drives the pressure head 11 to descend, and the cover body 12 descends synchronously with the pressure head 11, and the linkage rod 15 descends synchronously with the cover body 12. The descent of the linkage rod 15 drives the piston rod 16 to descend, and the descent of the piston rod 16 drives the piston 131 to descend. The piston 131 descends and compresses the hot air in the gas tank 13, so that the hot air is pressed into the outlet pipe 14 and ejected from the outlet hole 123, acting on the snow cover 33.

[0047] like Figure 5 and Figure 7As shown, in this embodiment, a heating box 17 is provided on the bracket 8, and the heating box 17 is connected to the gas tank 13 through an air inlet pipe 18, and the connecting point between the air inlet pipe 18 and the gas tank 13, and the connecting point between the air outlet pipe 14 and the gas tank 13 are both located at the bottom of the side wall of the gas tank 13, and a first one-way valve 132 is provided at the connecting point between the air inlet pipe 18 and the gas tank 13, and a second one-way valve 133 is provided at the connecting point between the air outlet pipe 14 and the gas tank 13. It should be noted that, after the turntable transports the axle box spring 3 to the bottom of the pressure head 11, the cylinder 10 drives the pressure head 11 to descend, and the cover body 12 descends synchronously with the pressure head 11, and the linkage rod 15 descends synchronously with the cover body 12. The descent of the linkage rod 15 drives the piston rod 16 to descend, and the descent of the piston rod 16 drives the piston 131 to descend. The descent of the piston 131 compresses the hot air in the gas tank 13, so that the hot air opens the second one-way valve 133 through pressure (the first one-way valve 132 is closed), and the hot air enters the outlet pipe 14 and is ejected from the outlet hole 123, acting on the snow cover 33, completing the hot installation of the snow cover 33, and then continuing to start the cylinder 10 to drive the pressure head 11 to descend, 3 is compressed. During the compression process, hot air will still be ejected from the air outlet 123. Therefore, when the axle box spring 3 is compressed to the working length, after the hot air around the axle box spring 3 cools down, the staff will screw the bolts into the upper clamping plate 31 and the lower clamping plate 32 of the axle box spring 3, so that the axle box spring 3 group is kept at the working height. When the compression of the axle box spring 3 is completed, the cylinder 10 drives the pressure head 11 to rise and reset. During the rising process, the linkage rod 15 drives the piston rod 16 and the piston 131 to rise. The rising of the piston 131 causes the gas tank 13 to generate suction, thereby opening the first one-way valve 132, and the hot air in the heating box 17 is sucked into the gas tank 13 to prepare for the next hot installation. In summary, in the present invention, by setting the first one-way valve 132, the heating box 17 and the second one-way valve 133, the piston 131 in the gas tank 13 can absorb the hot air in the heating box 17 during the rising process, and the piston 131 can release the hot air to act on the snow cover 33 during the descending process.

[0048] like Figure 8 As shown, in this embodiment, the cover body 12 includes a fixed cover 121 and a telescopic cover 122, the top of the fixed cover 121 is fixedly connected to the pressure head 11, and the top of the telescopic cover 122 is slidably inserted into the fixed cover 121 from the bottom of the fixed cover 121. A first limit platform is provided on the top of the side wall of the telescopic cover 122, and the first limit platform is arranged along the circumference of the telescopic axis. The first limit platform is slidably connected to the fixed cover 121, and a second limit platform is provided at the bottom opening 112 of the fixed cover 121, and the second limit platform is arranged opposite to the first limit platform. It should be noted that the cover body 12 is an inserted telescopic structure, and the first limit platform and the second limit platform are provided to limit the telescopic cover 122 to prevent it from falling off from the bottom of the fixed cover 121.

[0049] The working principle of the present invention is:

[0050] When it is necessary to pre-compress a batch of axle box springs 3, multiple axle box springs 3 are placed on the first conveyor belt 1. The first conveyor belt 1 drives the axle box spring 3 to move in the direction close to the truncated table 4 and conveys one axle box spring 3 into the arc notch 7. At this time, the motor drives the turntable to rotate. After the turntable rotates, the axle box spring 3 is conveyed to the bottom of the pressure head 11 through the arc notch 7. Then the cylinder 10 is started to drive the pressure head 11 to move downward, and the cover body 12 falls synchronously with the pressure head 11, and the linkage rod 15 falls synchronously with the cover body 12. The descent of the linkage rod 15 drives the piston rod 16 to fall. After the descent of the piston rod 16, it drives the piston 131 to fall. The descent of the piston 131 compresses the hot gas in the gas tank 13, so that the hot gas opens the second one-way valve 133 through pressure (the first one-way valve 132 is closed), and the hot gas enters the outlet pipe 14 and is ejected from the outlet hole 123, acting on the snow cover 33, completing the hot installation of the snow cover 33. After that, the cylinder 10 is started again to drive the pressure head 11 to descend. The pressure block 111 in the pressure head 11 abuts against the top of the axle box spring 3 to compress the axle box spring 3. During the compression process, hot air will still be ejected from the air outlet 123. Therefore, when the axle box spring 3 is compressed to the working length, after the hot air around the axle box spring 3 cools down, the staff will screw the bolts into the upper clamping plate 31 and the lower clamping plate 32 of the axle box spring 3 to keep the axle box spring 3 group at the working height. When the compression of the axle box spring 3 is completed, the cylinder 10 drives the pressure head 11 to rise and reset. During the rising process, the linkage rod 15 drives the piston rod 16 and the piston 131 to rise. The rise of the piston 131 causes the gas tank 13 to generate suction, thereby opening the first one-way valve 132, and the hot air in the heating box 17 is sucked into the gas tank 13 to prepare for the next hot loading work, and the turntable rotates to transport the next axle box spring 3 to the bottom of the pressure head 11 for pre-compression.

[0051] The circuits, electronic components and modules involved are all prior art and can be fully implemented by those skilled in the art. Needless to say, the content protected by the present invention does not involve improvements to software and methods.

[0052] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0053] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pre-compression device for an axle box spring group, characterized in that: The invention comprises a truncated table (4), wherein a guide plate (5) is provided at the edge of the truncated table (4), wherein the guide plate (5) is arranged along the circumference of the truncated table (4), and a rotating disk is rotatably connected to the middle of the truncated table (4), wherein the rotating disk is driven by a motor. A plurality of arc notches (7) are provided on the side wall of the rotating disk, and the plurality of arc notches (7) are arranged at equal intervals along the circumference of the rotating disk, and the arc notches (7) cooperate with the guide plate (5); One side of the truncated table (4) is connected to a first conveyor belt (1), and the first conveyor belt (1) conveys the axle box spring (3) into the truncated table (4); A mounting plate (9) is supported above the truncated table (4) by a bracket (8), a cylinder (10) is provided on the mounting plate (9), a piston rod (16) of the cylinder (10) is connected to a pressure head (11), a pressure block (111) is provided on the inner wall of the pressure head (11), the pressure block (111) is arranged along the circumference of the pressure head (11), and the outer diameter of the pressure block (111) matches the diameter of the axle box spring (3), and an opening (112) is provided through the side wall of the pressure head (11).

2. The axle box spring assembly pre-compression device according to claim 1, characterized in that: One side of the circular table (4) is also connected to a second conveyor belt (2), and the second conveyor belt (2) is arranged side by side with the first conveyor belt (1). The turntable conveys the axle box spring (3) on the circular table (4) to the second conveyor belt (2).

3. The axle box spring assembly pre-compression device according to claim 1, characterized in that: A cover body (12) is provided at the bottom of the pressure head (11), the outer shell of the cover body (12) has a cavity (124), a plurality of air outlet holes (123) communicating with the cavity (124) are provided through the inner wall of the cover body (12), a gas tank (13) is provided on the bracket (8), the gas tank (13) is filled with hot gas, the gas tank (13) is communicated with the cavity (124) through the gas outlet pipe (14), and a power device is provided on the gas tank (13), the power device is used to provide pressure to the gas tank (13), so as to transport the hot gas in the gas tank (13) to the cavity (124); The cover body (12) is a retractable structure.

4. The axle box spring assembly pre-compression device according to claim 3, characterized in that: The gas tank (13) is arranged in parallel with the pressure head (11), and the power device comprises a linkage rod (15), a piston rod (16) and a piston (131). The piston (131) is slidably embedded in the gas tank (13), one end of the piston rod (16) is connected to the top of the piston (131), and the other end slides out of the gas tank (13) to connect with the linkage rod (15), and the end of the linkage rod (15) away from the piston rod (16) is fixedly connected to the cover body (12).

5. The axle box spring assembly pre-compression device according to claim 4, characterized in that: A heating box (17) is provided on the bracket (8), and the heating box (17) is connected to the gas tank (13) through an air inlet pipe (18).

6. The axle box spring assembly pre-compression device according to claim 5, characterized in that: The connecting point between the air inlet pipe (18) and the gas tank (13), and the connecting point between the air outlet pipe (14) and the gas tank (13) are both located at the bottom of the side wall of the gas tank (13), and the connecting point between the air inlet pipe (18) and the gas tank (13) is provided with a first one-way valve (132), and the connecting point between the air outlet pipe (14) and the gas tank (13) is provided with a second one-way valve (133).

7. The axle box spring assembly pre-compression device according to claim 3, characterized in that: The cover body (12) comprises a fixed cover (121) and a telescopic cover (122); the top of the fixed cover (121) is fixedly connected to the pressure head (11); and the top of the telescopic cover (122) is slidably inserted into the fixed cover (121) from the bottom of the fixed cover (121).

8. The axle box spring assembly pre-compression device according to claim 7, characterized in that: A first limit platform is provided at the top of the side wall of the telescopic cover (122), the first limit platform is arranged along the circumference of the telescopic shaft, the first limit platform is slidably connected to the fixed cover (121), and a second limit platform is provided at the bottom opening (112) of the fixed cover (121), the second limit platform is arranged opposite to the first limit platform.

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