A heavy truck frame assembly assembly workbench

Abstract

The present application relates to the field of automobile assembly equipment, and specifically discloses a heavy truck frame assembly assembly workbench, which includes a large platform, and the four corners of the large platform are provided with shims and a lifting mechanism, and the two sides of the length direction of the large platform are provided with a calibration seat and a horizontal calibration ruler, and the horizontal calibration ruler includes a calibration part and two telescopic parts; the calibration part has a cavity built in and a floating block is slidably arranged in the cavity, and the calibration seat is provided with a detection component for monitoring the position of the floating block and controlling the corresponding lifting mechanism; the free end of the telescopic part is installed with a hose filled with liquid, one end of the hose is closed, and the other end is connected to the cavity of the calibration part, and the total length of the hose is not less than the length of the telescopic part when it is fully expanded. The present application characterizes the horizontality of the crossbeam by a floating block, and detects and controls the calibration of the lifting mechanism by a detection component, so as to realize high-precision automatic calibration of the horizontality of the longitudinal beam, and its assembly cost is low, and it can be applied to the horizontal calibration of frames of different lengths, and it is more economical.

Description

Technical Field

[0001] The present application relates to the field of automobile assembly equipment, and in particular to a heavy truck frame assembly assembly workbench. Background Art

[0002] The frame assembly of a heavy truck is composed of left and right longitudinal beams and several cross beams, brackets, supports, tilting shafts, etc. Various sub-components will produce varying degrees of processing errors during the manufacturing process. The cumulative error of the frame assembly produced by traditional assembly methods is very large and cannot guarantee product quality requirements.

[0003] At present, some modular assembly workbenches on the market mainly adopt a frame structure, which consists of a large platform, a positioning mechanism, a clamping mechanism, an internal support mechanism, and a shim. The large platform is the overall structure. The positioning mechanism and the clamping mechanism ensure the correct position of each part and the width of the frame assembly. The internal support mechanism ensures the internal opening size. The shim on the large platform ensures that the left and right longitudinal beams are located on the theoretical plane. Each part forms an organic whole to ensure the assembly accuracy between the various parts of the frame assembly.

[0004] However, in the actual assembly process, due to the long length of the longitudinal beams of heavy trucks, the calibration accuracy needs to be extremely high when calibrating the levelness of the two longitudinal beams. Conventional leveling calibration equipment usually responds slowly or has low accuracy, or has high accuracy but high equipment cost, making it difficult to solve the leveling calibration of long longitudinal beams in a relatively economical way. Summary of the invention

[0005] In order to improve the horizontal calibration problem of long longitudinal beams at a lower economic cost, the present application provides a heavy truck frame assembly assembly workbench.

[0006] The heavy truck frame assembly workbench provided in this application adopts the following technical solution:

[0007] A heavy truck frame assembly workbench comprises a large platform, a positioning mechanism, a clamping mechanism, an inner support mechanism and a shim, wherein the shims are arranged at the four corners of the large platform, and the large platform is provided with four lifting mechanisms respectively used to drive the four shims to rise and fall smoothly, and both sides of the large platform in the length direction are provided with a calibration seat and a horizontal calibration ruler, and the horizontal calibration ruler comprises a calibration part and two telescopic parts arranged at two opposite sides of the calibration part;

[0008] The calibration part has a cavity built in and a floating block is slidably arranged in the cavity, and the calibration seat is provided with a detection component for monitoring the position of the floating block and controlling the corresponding operation of the jacking mechanism;

[0009] A hose filled with liquid is installed at the free end of the telescopic part. One end of the hose is closed and the other end is connected to the cavity of the calibration part. The total length of the hose is not less than the length of the telescopic part when it is fully expanded.

[0010] By adopting the above technical scheme, when assembling the truck frame, first place the two longitudinal beams on the large platform, and position the two longitudinal beams through the positioning mechanism so that the ends of the two longitudinal beams are aligned, and then the inner opening size and outer edge size of the two longitudinal beams are respectively limited through the inner support mechanism and the clamping mechanism; then place the horizontal calibration ruler on the longitudinal beam to ensure that the free end of the telescopic part is connected to the end of the longitudinal beam, so that when the horizontality of the longitudinal beam does not reach the standard, the liquid in the hose in the telescopic part corresponding to the higher end of the longitudinal beam flows towards the calibration part under the action of gravity, and then pushes the floating block in the calibration part to move toward the lower end of the longitudinal beam and is detected by the detection component, and the detection component controls the corresponding lifting mechanism to work so that the lifting mechanism corresponding to the lower end of the longitudinal beam lifts the end until the two ends of the longitudinal beam reach the level, so as to realize the high-precision automatic calibration of the horizontality of the longitudinal beam. In addition, the horizontal calibration ruler has a simple structure, low assembly cost, and the total length of the telescopic part is variable, which can be applied to the horizontal calibration of frames of different lengths, and is more economical.

[0011] Optionally, the detection component includes two infrared sensors, and the infrared rays emitted by the transmitting ends of the two infrared sensors just fit the two side edges of the floating block close to the two telescopic parts. The infrared sensor is control-connected to the jacking mechanism adjacent thereto.

[0012] By adopting the above technical solution, after the horizontal calibration ruler is installed on the longitudinal beam, when the levelness of the longitudinal beam does not meet the standard, the liquid in the hose corresponding to the higher end of the longitudinal beam pushes the float block to move toward the lower side of the longitudinal beam, and the float block blocks the infrared rays emitted by the infrared sensor corresponding to the lower side of the longitudinal beam. The jacking mechanism corresponding to the infrared sensor works and drives the pad to jack up until the float block is reset to between the infrared rays emitted by the two infrared sensors, indicating that the levelness of the longitudinal beam has met the requirement at this time, thereby realizing the automatic calibration of the levelness of the frame longitudinal beam in this application.

[0013] Optionally, the calibration part is provided with two slow-flow structures in the cavity and arranged on both sides of the floating block, and the slow-flow structures separate the hose from the joint of the calibration part and the floating block.

[0014] By adopting the above technical solution, the flow-slowing structure can buffer the flow velocity of the liquid in the hose flowing into the cavity of the calibration part to a certain extent, so as to reduce the kinetic energy of the liquid flow in the hose as much as possible, thereby effectively controlling the stroke of the float block when the liquid flows in the cavity of the calibration part, and reducing the resistance caused by the inertia of the liquid flow that the float block needs to overcome when returning to the initial position after the cross beam is calibrated, so as to ensure the timeliness and accuracy of the controlled operation of the lifting mechanism.

[0015] Optionally, the slow-flow structure includes at least two partition plates, a plurality of slow-flow holes are formed through the partition plates, and the plurality of slow-flow holes on two adjacent partition plates are staggered.

[0016] By adopting the above technical solution, multiple partition plates are set up and corresponding staggered slow-flow holes are opened on the partition plates, which can greatly increase the distance traveled by the liquid when passing through the two partition plates, and can reasonably consume the kinetic energy of the liquid circulation, reduce the turbulence of the liquid flowing in the cavity of the calibration part, so that the float can move smoothly in the cavity, thereby ensuring the feedback accuracy of the float as much as possible.

[0017] Optionally, the end of the slow flow hole away from the floating block is flared.

[0018] By adopting the above technical solution, the liquid flowing into the cavity will close the slow flow holes on the partition plate during the process of passing through the slow flow holes, and the diameter of the tube for liquid circulation will be reduced, which can also reduce the kinetic energy of fluid circulation to a certain extent, thereby reducing the interference of the liquid on the floating block when flowing in the cavity.

[0019] Optionally, the telescopic portion comprises a plurality of telescopic rods which are sleeved in sequence, a protrusion is fixedly connected to the bottom surface of one end of the telescopic rod close to the calibration portion, and the bottom surfaces of the protrusions on the telescopic rods are flush;

[0020] One closed end of the hose is fixedly connected to the end of the telescopic rod farthest from the calibration part.

[0021] By adopting the above technical solution, when the horizontality of frame longitudinal beams of different sizes is calibrated, multiple telescopic rods can be stretched in sequence to change the total length of the multiple telescopic rods, and the end of the telescopic rod farthest from the calibration part is connected to the head end of the longitudinal beam. At this time, the horizontality of the longitudinal beam can be conveniently detected by the horizontal calibration ruler; and in this process, the bottom surfaces of the protrusions at the bottom of the multiple telescopic rods are flush, which can reduce the imbalance of the overall horizontality of the multiple telescopic rods caused by the flexible deformation of the multiple telescopic rods after they are unfolded, and ensure that the two ends of the telescopic part are on the same horizontal plane as much as possible, that is, the two ends of the hose on the telescopic part are on the same horizontal plane, thereby improving the accuracy of the detection result of the horizontal calibration ruler.

[0022] Optionally, the protrusion is installed on the bottom surface of the free end of the telescopic part.

[0023] By adopting the above technical solution, it can be further ensured that the telescopic rod farthest from the calibration part maintains a higher degree of parallelism with the longitudinal beam to be measured.

[0024] Optionally, a magnet is installed on the bottom surface of the protrusion.

[0025] By adopting the above technical solution, the magnet and the iron frame longitudinal beam are attracted to each other, so that the horizontal calibration ruler can be installed on the top surface, bottom surface or side surface of the longitudinal beam to be measured, so that the horizontality of the longitudinal beam can be detected in multiple directions to minimize the calibration error.

[0026] Optionally, the lifting mechanism includes a lifting screw installed at the bottom end of the shim, an inner screw barrel threadedly sleeved on the lifting screw, and a driving component for driving the inner screw barrel to rotate, and the driving component is control-connected to the detection component;

[0027] A positioning cylinder sleeved on the top of the lifting screw is fixedly connected to the large platform, a positioning strip arranged along its axial direction is fixedly connected inside the positioning cylinder, a positioning groove arranged along its axial direction is opened on the peripheral side of the lifting screw, and the positioning strip is slidably adapted to the positioning groove.

[0028] By adopting the above technical solution, when the detection component detects that the position of the floating block has changed, the driving component in the corresponding lifting mechanism is controlled to work. When the driving component works, the inner screw barrel is driven to rotate. Since the positioning bar on the positioning barrel is embedded in the positioning groove of the lifting screw, the lifting screw is restricted to move only in the vertical direction. Therefore, when the inner screw barrel rotates, the lifting screw can be driven to rise or fall, thereby lifting or lowering the longitudinal beam through the pad.

[0029] Optionally, the driving assembly includes a driving motor, a worm coaxially fixed to an output end of the driving motor, and a worm wheel coaxially fixed to the inner screw barrel and meshingly matched with the worm.

[0030] By adopting the above technical solution, the driving motor drives the worm to rotate when it is controlled to work, and the worm drives the worm wheel to rotate when the worm rotates, thereby driving the inner screw barrel to rotate, so as to achieve the driving effect of the lifting screw.

[0031] In summary, the present application includes at least one of the following beneficial technical effects:

[0032] 1. When assembling a truck frame, place the level calibration ruler on the longitudinal beam to ensure that the free end of the telescopic part is connected to the end of the longitudinal beam. When the levelness of the longitudinal beam does not meet the standard, the liquid in the hose of the telescopic part corresponding to the higher end of the longitudinal beam flows toward the calibration part under the action of gravity, thereby pushing the floating block in the calibration part to move toward the lower end of the longitudinal beam and being detected by the detection component. The detection component controls the corresponding lifting mechanism to work so that the lifting mechanism corresponding to the lower end of the longitudinal beam lifts the end until both ends of the longitudinal beam reach the level, thereby realizing high-precision automatic calibration of the levelness of the longitudinal beam. In addition, the level calibration ruler has a simple structure, low assembly cost, and the total length of the telescopic part is variable, which can be applied to the level calibration of frames of different lengths, and is more economical.

[0033] 2. The slow flow structure can buffer the flow velocity of the liquid in the hose flowing into the cavity of the calibration part to a certain extent, so as to reduce the kinetic energy of the liquid flow in the hose as much as possible, thereby effectively controlling the stroke of the floating block when the liquid flows in the cavity of the calibration part, and reducing the resistance caused by the inertia of the liquid flow that the floating block needs to overcome when the cross beam is reset to the initial position after being calibrated, so as to ensure the timeliness and accuracy of the controlled operation of the lifting mechanism;

[0034] 3. Installing a magnet on the convex block of the telescopic part can make the magnet attract the iron frame longitudinal beam, so that the horizontal calibration ruler can be installed on the top surface, bottom surface or side surface of the longitudinal beam to be measured, so as to perform multi-directional detection of the horizontality of the longitudinal beam to minimize the calibration error. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0036] Figure 2 It is a schematic diagram of the cross-sectional structure of the horizontal calibration ruler of the embodiment of the present application.

[0037] Figure 3 It is a structural schematic diagram mainly used to show the lifting mechanism of the embodiment of the present application.

[0038] Figure numerals: 1. large platform; 11. positioning mechanism; 12. clamping mechanism; 13. internal support mechanism; 21. washer; 22. lifting screw; 23. inner screw barrel; 24. positioning barrel; 25. positioning strip; 26. positioning groove; 27. driving motor; 28. worm; 29. ​​worm gear; 3. calibration seat; 31. infrared sensor; 4. horizontal calibration ruler; 41. calibration part; 411. cavity; 412. floating block; 413; partition plate; 414. slow flow hole; 42. telescopic part; 421. telescopic rod; 422. bump; 424. magnet; 43. hose. DETAILED DESCRIPTION

[0039] The following is combined with Figure 1-3 This application is described in further detail.

[0040] The present application embodiment discloses a heavy truck frame assembly assembly workbench. Figure 1 A heavy truck frame assembly workbench includes a large platform 1, a positioning mechanism 11, a clamping mechanism 12, an internal support mechanism 13 and a shim 21. The four corners of the large platform 1 are provided with shims 21, and the large platform 1 is provided with four lifting mechanisms for driving the four shims 21 to rise and fall smoothly. In the specific setting, the large platform 1 is set to a rectangular frame shape, the positioning mechanism 11 is a plurality of positioning pins installed on the large platform 1, and the positioning pins can be plugged into the openings on the frame to achieve the positioning of the frame on the large platform 1; the clamping mechanism 12 is a clamping plate installed on the side of the large platform 1 through a screw structure, and the clamping plate can be pressed against the outer wall of the longitudinal beam by rotating the screw; and the internal support mechanism 13 is also a support plate installed in the middle of the large platform 1 through a screw structure, so that the support plate and the clamping plate are installed relative to each other, so that the longitudinal beam can be stably and firmly positioned and fixed.

[0041] Reference Figure 1 and Figure 2 A calibration seat 3 and a horizontal calibration ruler 4 are provided on both sides of the length direction of the large platform 1. The calibration seat 3 is fixedly connected to the outer wall of the large platform 1. The horizontal calibration ruler 4 includes a calibration part 41 and two telescopic parts 42 on opposite sides of the calibration part 41; the calibration part 41 has a cavity 411 built in it and a floating block 412 is slidably arranged in the cavity 411, and a detection component for monitoring the position of the floating block 412 and controlling the operation of the corresponding jacking mechanism is provided on the calibration seat 3; a hose 43 filled with liquid is installed at the free end of the telescopic part 42, one end of the hose 43 is closed and the other end is connected to the cavity 411 of the calibration part 41, and the total length of the hose 43 is not less than the length of the telescopic part 42 when it is fully expanded. The liquid filled in the hose 43 can be water, oil, or an organic solvent, etc., and it should be clarified that the liquid must not completely fill the hose 43, and the cavity 411 of the calibration part 41 is filled with the liquid. Or in other feasible embodiments, a ventilation hole may be further opened on the hose 43, and a breathable and water-impermeable semipermeable membrane may be provided at the ventilation hole to seal the ventilation hole. The semipermeable membrane may be a polytetrafluoroethylene membrane.

[0042] Specifically, refer to Figure 1 and Figure 2The calibration part 41 is in a transparent shell shape, the floating block 412 is a foaming material with a dark appearance, such as foam, and the contact part between the floating block 412 and the cavity wall of the cavity 411 of the calibration part 41 is provided with a smooth arc surface. Optionally, a smooth layer with a low friction coefficient, such as a polytetrafluoroethylene coating or a thin plate, can be further provided on the smooth arc surface of the floating block 412. The detection component includes two infrared sensors 31, and the infrared rays emitted by the transmitting ends of the two infrared sensors 31 just fit the two sides of the floating block 412 close to the two telescopic parts 42. The infrared sensors 31 are controlled and connected with the jacking mechanism adjacent to them.

[0043] In this way, when assembling the truck frame, the two longitudinal beams are first placed on the large platform 1, and the positions of the two longitudinal beams are positioned by the positioning mechanism 11 so that the ends of the two longitudinal beams are aligned, and then the inner opening size and outer edge size of the two longitudinal beams are respectively limited by the inner support mechanism 13 and the clamping mechanism 12. Then place the horizontal calibration ruler 4 on the longitudinal beam, and ensure that the free end of the telescopic part 42 is connected to the end of the longitudinal beam. In this way, when the horizontality of the longitudinal beam does not meet the standard, the liquid in the hose 43 in the telescopic part 42 corresponding to the higher end of the longitudinal beam flows towards the calibration part 41 under the action of gravity, and then pushes the floating block 412 in the calibration part 41 to move toward the lower end of the longitudinal beam. The floating block 412 blocks the infrared rays emitted by the infrared sensor 31 corresponding to the lower side of the longitudinal beam, and the lifting mechanism corresponding to the infrared sensor 31 is controlled to work and drive the pad to lift until the floating block 412 is reset to between the infrared rays emitted by the two infrared sensors 31, indicating that the horizontality of the longitudinal beam has met the requirements at this time, and the high-precision automatic calibration of the horizontality of the longitudinal beam can be achieved. In addition, the structure of the horizontal calibration ruler 4 is simple, the assembly cost is low, and the total length of the telescopic part 42 is variable, which can be applied to the horizontal calibration of frames of different lengths, and is more economical.

[0044] However, considering that the liquid in the hose 43 has a certain kinetic energy when it flows into the cavity 411 of the calibration part 41 under gravity, these liquids have a certain inertia when pushing the float 412 to move, which will cause the float 412 to move excessively in the calibration part 41 and the lifting mechanism to be over-adjusted, affecting the overall horizontal calibration efficiency.

[0045] In view of this, refer to Figure 2 In the calibration part 41, two slow-flow structures are arranged on both sides of the floating block 412 in the cavity 411. The slow-flow structure separates the joint between the hose 43 and the calibration part 41 and the floating block 412; specifically, the slow-flow structure includes at least two partition plates 413 fixedly connected to the cavity 411 of the calibration part 41, and a plurality of slow-flow holes 414 are opened through the partition plates 413. The plurality of slow-flow holes 414 on two adjacent partition plates 413 are staggered; and the end of the slow-flow hole 414 away from the floating block 412 is flared.

[0046] After such arrangement, when the liquid in the hose 43 flows into the cavity 411 of the calibration part 41, on the one hand, the multiple partition plates 413 are arranged and the corresponding staggered slow flow holes 414 are opened on the partition plates 413, which can greatly increase the stroke of the liquid when passing through the two partition plates 413, and can reasonably consume the kinetic energy of the liquid flow, reduce the turbulence of the liquid flow in the cavity 411 of the calibration part 41, so that the float 412 can move smoothly in the cavity 411, and ensure the feedback accuracy of the float 412 as much as possible; on the other hand, when the liquid flowing into the cavity 411 passes through the slow flow holes 414 on the partition plates 413, the slow flow holes 414 close, and the diameter of the liquid flow pipe is reduced, which can also reduce the kinetic energy of the fluid flow to a certain extent, thereby reducing the interference of the liquid on the float 412 when flowing in the cavity 411. Thereby, the excessive movement of the float 412 in the calibration part 41 and the excessive adjustment of the lifting mechanism can be improved.

[0047] At the same time, in order to further reduce the horizontal error of the horizontal calibration ruler 4 itself, refer to Figure 2 The telescopic part 42 includes a plurality of telescopic rods 421 which are sleeved in sequence. The telescopic rods 421 can be square steel or channel steel. In this embodiment, the telescopic rods 421 are set as channel steel with an upper opening. A protrusion 422 is fixedly connected to the bottom surface of one end of the telescopic rod 421 close to the calibration part 41. The bottom surface of the protrusion 422 on each telescopic rod 421 is flush; the closed end of the hose 43 is fixedly connected to the end of the telescopic rod 421 farthest from the calibration part 41. The hose 43 is arranged in a curled or spiral shape in the cavity of the telescopic rod 421; the bottom surface of the free end of the telescopic part 42 is also installed with a protrusion 422, and the bottom surface of the protrusion 422 is installed with a magnet 424, which is installed in the bottom of the protrusion 422 in an embedded form. Optionally, the magnet 424 can also be embedded in the bottom of the calibration part 41.

[0048] After such arrangement, when the horizontality of the frame longitudinal beams of different sizes is calibrated, the multiple telescopic rods 421 can be stretched in sequence to change the total length of the multiple telescopic rods 421, and the end of the telescopic rod 421 farthest from the calibration part 41 is connected to the head end of the longitudinal beam. At this time, the horizontal calibration ruler 4 can conveniently detect the horizontality of the longitudinal beam; and in this process, the bottom surfaces of the protrusions 422 at the bottom of the multiple telescopic rods 421 are flush, which can reduce the phenomenon of the overall horizontality imbalance of the multiple telescopic rods 421 caused by the flexible deformation of the multiple telescopic rods 421 after they are unfolded, and ensure that the two ends of the telescopic part 42 are on the same horizontal plane as much as possible, that is, the two ends of the hose 43 on the telescopic part 42 are on the same horizontal plane, so as to improve the accuracy of the detection result of the horizontal calibration ruler 4. At the same time, with the help of the magnet 424 and the iron frame longitudinal beam, the horizontal calibration ruler 4 can be installed on the top surface, bottom surface or side surface of the longitudinal beam to be tested, so that the horizontality of the longitudinal beam can be detected in multiple directions to reduce the calibration error as much as possible.

[0049] In addition, refer to Figure 1 and Figure 3 The above-mentioned lifting mechanism includes a lifting screw 22 installed at the bottom end of the washer 21, an inner screw barrel 23 threadedly sleeved on the lifting screw 22, and a driving assembly for driving the inner screw barrel 23 to rotate, and the driving assembly is control-connected with the detection assembly; specifically, a positioning barrel 24 sleeved on the top of the lifting screw 22 is fixedly connected on the large platform 1, and a positioning bar 25 arranged along its axial direction is fixedly connected in the positioning barrel 24, and a positioning groove 26 arranged along its axial direction is opened on the peripheral side of the lifting screw 22, and the positioning bar 25 is slidably matched with the positioning groove 26. Among them, the driving assembly includes a driving motor 27, a worm 28 coaxially fixed to the output end of the driving motor 27, and a worm wheel 29 coaxially fixed to the inner screw barrel 23 and meshingly matched with the worm 28, and the driving motor 27 is control-connected with the adjacent infrared sensor, and the driving motor 27 is a reduction servo motor.

[0050] In this way, when one of the infrared sensors detects that the position of the floating block 412 has changed and blocks the infrared rays emitted by it, the drive motor 27 corresponding to the infrared sensor is started and drives the worm 28 to rotate. When the worm 28 rotates, the worm wheel 29 is driven to rotate, thereby driving the inner screw barrel 23 to rotate; and because the positioning bar 25 on the positioning barrel 24 is embedded in the positioning groove 26 of the jacking screw 22, the jacking screw 22 is restricted to move only in the vertical direction. Therefore, when the inner screw barrel 23 rotates, the jacking screw 22 can be driven to rise, thereby lifting the longitudinal beam through the pad to achieve high-precision lifting of the lower end of the frame longitudinal beam.

[0051] The implementation principle of a heavy truck frame assembly workbench of the embodiment of the present application is as follows: when assembling the truck frame, place the horizontal calibration ruler 4 on the longitudinal beam to ensure that the free end of the telescopic part 42 is connected to the end of the longitudinal beam. When the horizontality of the longitudinal beam does not meet the standard, the liquid in the hose 43 in the telescopic part 42 corresponding to the higher end of the longitudinal beam flows toward the calibration part 41 under the action of gravity, thereby pushing the floating block 412 in the calibration part 41 to move toward the lower end of the longitudinal beam. The floating block 412 blocks the infrared rays emitted by the infrared sensor 31 corresponding to the lower side of the longitudinal beam, and the driving motor 27 corresponding to the infrared sensor 31 is controlled to work and drive the pad to lift until the floating block 412 is reset to between the infrared rays emitted by the two infrared sensors 31, indicating that the horizontality of the longitudinal beam has reached the requirement at this time, and the high-precision automatic calibration of the horizontality of the longitudinal beam can be achieved. In addition, the structure of the horizontal calibration ruler 4 is simple, the assembly cost is low, and the total length of the telescopic part 42 is variable, which can be applied to the horizontal calibration of frames of different lengths, and is more economical.

[0052] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A heavy truck frame assembly workbench, comprising a large platform (1), a positioning mechanism (11), a clamping mechanism (12), an inner support mechanism (13) and a shim (21), characterized in that: The four corners of the large platform (1) are provided with the washers (21); the large platform (1) is provided with four lifting mechanisms for driving the four washers (21) to rise and fall smoothly; calibration seats (3) and horizontal calibration rulers (4) are provided on both sides of the length direction of the large platform (1); the horizontal calibration ruler (4) comprises a calibration portion (41) and two telescopic portions (42) disposed on opposite sides of the calibration portion (41); The calibration part (41) has a cavity (411) built therein, and a floating block (412) is slidably arranged in the cavity (411); the calibration seat (3) is provided with a detection component for monitoring the position of the floating block (412) and controlling the operation of the corresponding lifting mechanism; A hose (43) filled with liquid is installed at the free end of the telescopic portion (42); one end of the hose (43) is closed and the other end is connected to the cavity (411) of the calibration portion (41); the total length of the hose (43) is not less than the length of the telescopic portion (42) when it is fully extended; The detection assembly comprises two infrared sensors (31), the infrared rays emitted by the transmitting ends of the two infrared sensors (31) just fit the two side edges of the floating block (412) close to the two telescopic parts (42), and the infrared sensors (31) are controllably connected to the jacking mechanism adjacent thereto; The calibration part (41) is provided with two slow-flow structures in the cavity (411) and arranged on both sides of the floating block (412). The slow-flow structures separate the joint between the hose (43) and the calibration part (41) and the floating block (412).

2. The heavy truck frame assembly workbench according to claim 1, characterized in that: The slow flow structure comprises at least two partition plates (413), a plurality of slow flow holes (414) are formed through the partition plates (413), and the plurality of slow flow holes (414) on two adjacent partition plates (413) are staggered.

3. The heavy truck frame assembly workbench according to claim 2 is characterized in that: The end of the slow flow hole (414) facing away from the floating block (412) is in a flared shape.

4. The heavy truck frame assembly assembly workbench according to claim 1, characterized in that: The telescopic portion (42) comprises a plurality of telescopic rods (421) which are sleeved in sequence, a protrusion (422) being fixedly connected to the bottom surface of one end of the telescopic rod (421) close to the calibration portion (41), and the bottom surfaces of the protrusions (422) on the telescopic rods (421) are flush; One closed end of the hose (43) is fixedly connected to the end of the telescopic rod (421) farthest from the calibration portion (41).

5. The heavy truck frame assembly workbench according to claim 4, characterized in that: The protrusion (422) is installed on the bottom surface of the free end of the telescopic portion (42).

6. The heavy truck frame assembly assembly workbench according to claim 5, characterized in that: A magnet (424) is installed on the bottom surface of the protrusion (422).

7. The heavy truck frame assembly workbench according to claim 1, characterized in that: The lifting mechanism comprises a lifting screw (22) mounted at the bottom end of the washer (21), an inner screw barrel (23) threadedly sleeved on the lifting screw (22), and a driving component for driving the inner screw barrel (23) to rotate, wherein the driving component is controllably connected to the detection component; A positioning cylinder (24) sleeved on the top of the lifting screw (22) is fixedly connected to the large platform (1), a positioning strip (25) arranged along its axial direction is fixedly connected inside the positioning cylinder (24), a positioning groove (26) arranged along its axial direction is formed on the circumference of the lifting screw (22), and the positioning strip (25) is slidably fitted in the positioning groove (26).

8. The heavy truck frame assembly assembly workbench according to claim 7, characterized in that: The drive assembly comprises a drive motor (27), a worm (28) coaxially fixed to an output end of the drive motor (27), and a worm wheel (29) coaxially fixed to the inner screw barrel (23) and meshingly matched with the worm (28).

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