A work car for wax pattern assembly trees

Abstract

The application discloses a working vehicle for wax mold group trees, and relates to the technical field of wax mold group tree welding, which comprises a frame, a power mechanism, a lower end transmission assembly, an upper end transmission assembly and a lifting mechanism. The application realizes automatic adjustment of the wax mold group trees through bidirectional precise control of a servo motor. When the servo motor rotates counterclockwise, the lifting mechanism drives the wax mold group trees to complete lifting actions. When the servo motor rotates clockwise, a rotating plate drives the wax mold group trees to realize angle rotation. On the one hand, the application avoids the problems of surface extrusion deformation and bump damage of the wax mold caused by improper operation in manual rotation operation, and solves the pain point that it is difficult to ensure consistent surface angle in manual adjustment. On the other hand, the application effectively relieves the inconvenience of frequently adjusting the posture to adapt to the operation in manual welding, and significantly improves the work efficiency.

Description

Technical Field

[0001] This invention relates to the field of wax model tree assembly technology, and more particularly to a work vehicle for wax model tree assembly. Background Technology

[0002] Please see Figure 1 The wax model assembly 100 is a key component of the investment casting (also known as lost-wax casting) process. Its structure consists of a feed rod 10, a crossbar 20, and wax models 30. The feed rod 10 has a conical bottom to increase its contact area with the table for stable vertical placement. Multiple wax models 30 are welded to the feed rod 10 via the crossbar 20. To increase the loading capacity of the wax models 30, the feed rod 10 typically requires welding on two to eight sides. The quality of this step directly determines the yield rate of subsequent castings.

[0003] During the fabrication of the wax model tree 100, the face-changing welding operation faces multiple challenges: Firstly, the material handling rod 10 itself has a complex structure, and its overall weight is significant when the wax model 30 is mounted on it. Rotating and changing faces requires the coordinated efforts of multiple people, making the operation difficult. Secondly, during manual rotation, improper operation can easily lead to deformation or damage to the surface of the wax model 30 due to compression or impact. Furthermore, it is difficult to guarantee the accuracy of the angle after each face change, which can cause deviations in the welding position of the wax model 30, thus affecting the quality of subsequent castings. In addition, the material handling rod 10 has a certain height, requiring frequent adjustments to the worker's posture to adapt to the working position when manually welding wax models 30 at different heights. Prolonged operation can easily lead to worker fatigue, affecting work efficiency and stability.

[0004] To address these issues, we designed a work vehicle for wax model tree assembly. Summary of the Invention

[0005] In response to the above situation and to overcome the shortcomings of the existing technology, the present invention provides a work vehicle for wax model assembly, which upgrades the operation mode from manual to semi-automatic. First, it drives the wax model assembly to rotate precisely at a specified angle as needed, so that the face can be changed without manual handling, ensuring the convenience and angle accuracy of welding face switching. Second, it controls the flexible lifting and lowering of the wax model assembly, so that the welding position at different heights is always adapted to the manual operation posture, reducing the fatigue of the operator.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A work vehicle for assembling wax model trees includes: a frame, a power mechanism, a lower transmission assembly, an upper transmission assembly, and a lifting mechanism;

[0008] The power mechanism is divided into a lower transmission assembly and an upper transmission assembly at its upper and lower ends. The power mechanism consists of a telescopic rod, a screw, a servo motor, a first power assembly, a second power assembly, control plates, and springs. Both ends of the telescopic rod are equipped with screws, with the lower screw connected to the servo motor. Two control plates are connected to the two screws respectively, and each is connected to a spring. The first power assembly includes a first nut, a first one-way bearing that locks counterclockwise, a first mounting plate, and multiple first transmission rods. The first nut is fitted onto the lower screw, and the first one-way bearing connects the first nut to the first mounting plate. The second power assembly has the same structure and connection method as the first power assembly; the second nut is fitted onto the upper screw, and its second one-way bearing locks clockwise.

[0009] The upper transmission assembly includes: a rectangular plate, a rotating plate, and a second positioning plate; the rectangular plate is nested in the rectangular through-hole of the frame, the rotating plate is rotatably mounted on the rectangular plate, and the bottom surface of the rotating plate is provided with multiple second columnar blocks with slots; the second positioning plate is connected to the bottom surface of the rectangular plate through a spring rod, and has eight positioning slots equidistantly opened in the inner circle, which are nested and cooperate with the second columnar blocks; the free ends of multiple second transmission rods of the second power assembly are inserted into the corresponding slots and fit against the top surface of the second positioning plate;

[0010] When the servo motor rotates clockwise, it drives the rotating plate to rotate via the second power component; when it rotates counterclockwise, it drives the lower transmission component via the first power component, which in turn moves the rectangular plate up and down in conjunction with the lifting mechanism.

[0011] In one embodiment, the frame includes a top surface, a bottom plate, and multiple supports. The supports are used to support the top surface and the bottom plate, so that the two maintain a relatively fixed distance. The top surface has a rectangular through-hole, and the bottom surface of the frame has limit plates extending vertically downward at both ends of the through-hole.

[0012] In one embodiment, a handrail is fitted on one side of the top surface, and multiple casters with locking function are installed at the bottom of the frame.

[0013] In one embodiment, a control panel is provided on the top surface, and the control panel is provided with two buttons, which respectively control the servo motor to rotate counterclockwise by a certain angle and clockwise by a certain angle.

[0014] In one embodiment, the lower transmission assembly includes: an assembly tube, a cam, and a first positioning plate; the assembly tube is fixed to the frame and arranged coaxially with the screw; the cam is rotatably mounted on the lower end of the assembly tube, and its structure has four interconnected slotted cams on its top surface, and also has multiple first columnar blocks, each with a slot; the first positioning plate is sleeved on the upper end of the assembly tube, and the first positioning plate moves up and down, and its edge has multiple positioning slots equidistantly provided, with the first columnar blocks engaging with the positioning slots; the free ends of multiple first transmission rods of the first power assembly are inserted into the slots of the corresponding first columnar blocks and are in contact with the bottom surface of the first positioning plate.

[0015] In one embodiment, two lifting mechanisms are provided and arranged opposite to each other, each including: a slide rail, a slider, a rotating column, and a connecting rod; the slider is nested on the horizontally arranged slide rail, and a downwardly extending rotating column is fixed on the bottom surface, with the lower end of the rotating column nested in a grooved cam; horizontal assembly rods are fixed on both sides of the slider, and the lower ends of the connecting rods are rotatably connected to the two assembly rods respectively; the upper ends of the connecting rods of the two lifting mechanisms are coaxially rotatably connected to the rectangular plate.

[0016] In one embodiment, the lifting drive of the rectangular plate can be other methods; several lifting columns are fixed on the bottom surface of the rectangular plate, and the original cam one is replaced by cam two. Cam two is rotatably mounted on the lower end of the assembly tube. Its structure consists of four protrusions extending in the vertical direction, and several lifting columns are in contact with the top surface of cam two.

[0017] In one embodiment, the lower end of the feeding rod has multiple grooves.

[0018] In one embodiment, the rotating plate is provided with a clamping mechanism, which includes: a base, a rotating ring, grippers, and pins; the base is fixedly mounted on the rotating plate, and its top surface has multiple slides radially distributed along the axis, with elastic elements provided in the slides; the grippers are inverted "L" shapes, and the lower ends of the multiple grippers are slidably embedded in each slide and connected to the elastic elements; the rotating ring is rotatably mounted on the base, and its inner ring has multiple protrusions, with the surfaces of the protrusions and grippers being arc surfaces; pin holes are correspondingly provided on the base and the rotating ring.

[0019] In one embodiment, the base and the rotating ring are respectively provided with pin holes, and the pin is inserted into the pin holes of the base and the rotating ring.

[0020] The beneficial effects of this invention are as follows:

[0021] This invention achieves automated adjustment of the wax model assembly through bidirectional precise control of a servo motor: when the servo motor rotates counterclockwise, the lifting mechanism drives the wax model assembly to complete the lifting action; when it rotates clockwise, the rotating plate drives the wax model assembly to achieve angular rotation. This design avoids the problems of wax model surface extrusion deformation and bump damage caused by improper operation during manual rotation, and solves the pain point of difficulty in ensuring consistent angles when changing sides during manual adjustment. On the other hand, it also effectively alleviates the inconvenience of frequently adjusting body posture to adapt to operation during manual welding, significantly improving work efficiency.

[0022] This invention significantly improves clamping strength by precisely engaging multiple grippers of the clamping mechanism with corresponding grooves at the lower end of the material feeding rod, ensuring the stability of the wax model assembly during rotation and lifting, and avoiding displacement deviation. Attached Figure Description

[0023] Figure 1This invention relates to a schematic diagram of a prior art wax model tree structure;

[0024] Figure 2 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 3 This is a schematic diagram of one side of the structure of the present invention;

[0026] Figure 4 This is a schematic diagram of the power mechanism structure of the present invention;

[0027] Figure 5 This is an exploded view of the lower transmission assembly of the present invention;

[0028] Figure 6 This is a schematic diagram showing the connection between the lower transmission component and the power mechanism of the present invention;

[0029] Figure 7 This is an exploded view of the upper transmission component of the present invention;

[0030] Figure 8 This is a schematic diagram showing the connection between the upper transmission component and the power mechanism of the present invention;

[0031] Figure 9 This is a schematic diagram of the lifting mechanism structure of the present invention;

[0032] Figure 10 This is a schematic diagram of the contact between the second cam and the rotating column of the present invention;

[0033] Figure 11 This is a schematic diagram of the clamping mechanism of the present invention;

[0034] Figure 12 This is an exploded view of the clamping mechanism of the present invention;

[0035] Figure 13 This is a schematic diagram showing the connection between the lifting column and the second cam of the present invention;

[0036] Figure 14 This is a schematic diagram of the cam structure of the present invention;

[0037] Figure 15 This is a schematic diagram of the first power component driving the lower transmission component to move according to the present invention;

[0038] Figure 16 This is a schematic diagram of the second power component driving the upper transmission component of the present invention.

[0039] In the diagram: 100, Wax Model Assembly Tree; 10, Material Threading Rod; 20, Crossbar; 30, Wax Model; 110, Groove; 1, Frame; 11, Top Surface; 12, Base Plate; 13, Support; 14, Control Panel; 15, Limiting Plate; 16, Handrail; 2, Power Mechanism; 21, Telescopic Rod; 22, Screw; 23, Servo Motor; 24, First Power Component; 25, Control Plate; 26, Spring; 27, Second Power Component; 241, First Nut; 242, First One-Way Bearing; 243, First Assembly Plate; 244, First Transmission Rod; 271, Second Nut; 272, Second One-Way Bearing; 273, Second Assembly Plate; 274, Second Transmission Rod; 3. 31. Lower transmission assembly; 32. Assembly tube; 33. Cam 1; 34. First positioning plate; 35. Cam 2; 311. Slide groove; 321. First columnar block; 322. Groove cam; 331. Positioning groove 1; 4. Upper transmission assembly; 41. Rectangular plate; 411. Lifting column; 42. Rotating plate; 43. Second positioning plate; 421. Second columnar block; 431. Positioning groove 2; 432. Spring rod; 5. Lifting mechanism; 51. Slide rail; 52. Slider; 53. Rotating column; 54. Connecting rod; 521. Assembly rod; 6. Clamping mechanism; 61. Base; 62. Rotating ring; 63. Gripper; 64. Pin; 621. Protrusion; 631. Elastic element. Detailed Implementation

[0040] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments of the present invention include, but are not limited to, the following embodiments.

[0041] First embodiment:

[0042] Please see Figure 2-3 The present invention provides a work vehicle for wax model tree assembly, comprising: a frame 1, a power mechanism 2, a lower transmission assembly 3, an upper transmission assembly 4, and a lifting mechanism 5;

[0043] Please see Figure 2-3 The frame 1 is equipped with a power mechanism 2. The lower end of the power mechanism 2 is provided with a lower transmission component 3, and the upper end of the power mechanism 2 is provided with an upper transmission component 4. The lower transmission component 3 drives the wax model tree 100 to move up and down through the lifting mechanism 5, and the upper transmission component 4 drives the wax model tree 100 to rotate.

[0044] Please see Figure 2-3The frame 1 includes a top surface 11, a bottom plate 12, and multiple supports 13. The supports 13 are used to support the top surface 11 and the bottom plate 12, so that the two maintain a relatively fixed distance. The top surface 11 has a rectangular through opening, and the bottom surface of the frame 1 has a limit plate 15 extending vertically downward at both ends of the through opening. A handrail 16 is installed on one side of the top surface 11, and multiple casters with locking function are installed at the bottom of the frame 1. The casters can be used to flexibly move the frame 1 to a designated position.

[0045] Please see Figure 4 The power mechanism 2 consists of a telescopic rod 21, a screw 22, a servo motor 23, a first power assembly 24, a control plate 25, a spring 26, and a second power assembly 27. The telescopic rod 21 is a nested structure of two rectangular cross-section sleeves, with screws 22 mounted at both its upper and lower ends. The lower screw 22 passes through the base plate 12 and is connected to the servo motor 23 for transmission. The two control plates 25 are rotatably connected to the two screws 22 respectively, and springs 26 are connected to the opposite sides of both plates.

[0046] The first power assembly 24 includes: a first nut 241, a first one-way bearing 242, a first mounting plate 243, and a plurality of first transmission rods 244; the first nut 241 is sleeved on the lower screw 22, and its outer wall is fixed to the inner ring of the first one-way bearing 242, while the first mounting plate 243 is fixed to the outer ring of the first one-way bearing 242; when the first one-way bearing 242 rotates counterclockwise, it locks and rotates synchronously with the first nut 241, and when it rotates clockwise, it rotates freely, and the lower spring 26 is attached to the bottom surface of the first mounting plate 243;

[0047] The second power assembly 27 includes: a second nut 271, a second one-way bearing 272, a second mounting plate 273, and a plurality of second transmission rods 274; the second nut 271 is sleeved on the upper screw 22, the inner ring of the second one-way bearing 272 is fixed to the second nut 271, and the outer ring is fixed to the second mounting plate 273; when the second one-way bearing 272 rotates clockwise, it locks and rotates synchronously with the second nut 271, and when it rotates counterclockwise, it rotates freely, and the upper spring 26 is attached to the top surface of the second mounting plate 273;

[0048] Please see Figure 5 , Figure 6The lower transmission assembly 3 includes: an assembly tube 31, a cam 32, and a first positioning plate 33; the assembly tube 31 is fixed to the top surface of the base plate 12 and is arranged coaxially with the screw 22; the cam 32 is rotatably mounted on the lower end of the assembly tube 31, and its structure is that four interconnected slotted cams 322 are opened on the top surface, and multiple first columnar blocks 321 are also provided, each of the first columnar blocks 321 having a downwardly extending slot along the top surface; the first positioning plate 33 is sleeved on the upper end of the assembly tube 31, and moves up and down by nesting with multiple sliding grooves 311 on the assembly tube 31, and multiple positioning grooves 331 are equidistantly opened on its edge, the first columnar blocks 321 meshing with the positioning grooves 331 to restrict the rotation of the cam 32; the free ends of multiple first transmission rods 244 of the first power assembly 24 are inserted into the slots of the corresponding first columnar blocks 321 and are in contact with the bottom surface of the first positioning plate 33;

[0049] Please see Figure 15 The specific movement of the lower transmission component 3 is as follows: When the servo motor 23 rotates counterclockwise, the first power component 24 is triggered, and the two screws 22 rotate synchronously through the telescopic rod 21; because the free ends of the multiple first transmission rods 244 of the first power component 24 are embedded in the slots of the first columnar block 321, the first power component 24 cannot rotate with the screws 22, and the lower screw 22 drives the first mounting plate 243 to move upward through the first nut 241, while compressing the lower spring 26; as the first power component 24 moves upward, the multiple first transmission rods 244 synchronously push the first positioning plate 33 upward, so that the positioning groove 331 of the first positioning plate 33 separates from the first columnar block 321; when When the lower control plate 25 blocks the first power assembly 24 from moving upward, the multiple first transmission rods 244 of the first power assembly 24 drive the cam 32 to rotate at a certain angle and then stop. That is, the servo motor 23 rotates counterclockwise to the set angle and stops. The lower spring 26 releases its elastic force to push the first power assembly 24 to reset downward. At this time, the first nut 241 spins freely on the lower screw 22, and the first positioning plate 33 moves downward synchronously. Its positioning groove 331 is nested and engaged with the first columnar block 321 again to reposition the cam 32. It should be noted that during the counterclockwise rotation of the upper screw 22, the second nut 271 is in a free-spinning state, so the second power assembly 27 does not move upward.

[0050] Please see Figure 7 , Figure 8The upper transmission assembly 4 includes: a rectangular plate 41, a rotating plate 42, and a second positioning plate 43; the rectangular plate 41 is nested in the rectangular through-hole of the top surface 11 and is fitted with the limiting plate 15; the rotating plate 42 is rotatably positioned at the center of the rectangular plate 41, and its bottom surface is provided with a plurality of second columnar blocks 421, each of which has an upwardly extending slot along its bottom surface. The second positioning plate 43 is connected to the bottom surface of the rectangular plate 41 by a spring rod 432, and its inner ring is provided with eight positioning slots 431 at equal intervals. The second columnar blocks 421 of the rotating plate 42 are nested and fitted with the positioning slots 431 to restrict the rotation of the rotating plate 42; the free ends of a plurality of second transmission rods 274 of the second power assembly 27 are inserted into the slots of the corresponding second columnar blocks 421 and are fitted with the top surface of the second positioning plate 43;

[0051] Please see Figure 16 The specific movement of the upper transmission component 4 is as follows: When the servo motor 23 rotates clockwise, the second power component 27 is triggered; because the free ends of the multiple second transmission rods 274 of the second power component 27 are embedded in the slots of the second columnar block 421, the second power component 27 cannot rotate with the screw 22. The upper screw 22 drives the second mounting plate 273 to move downward through the second nut 271, while compressing the upper spring 26; as the second power component 27 moves downward, the multiple second transmission rods 274 simultaneously push the second positioning plate 43 downward, causing the positioning slot 431 of the second positioning plate 43 to separate from the second columnar block 421; when the upper control plate 25 blocks the second power... As component 27 continues to move downward, the multiple second transmission rods 274 of the second power component 27 drive the rotating plate 42 to rotate at a certain angle and then stop. That is, the servo motor 23 rotates clockwise to the set angle and stops. The upper spring 26 releases its elastic force to push the first power component 24 to reset upward. At this time, the second nut 271 spins freely on the upper screw 22, and the second positioning plate 43 moves upward synchronously through the spring rod 432. Its positioning groove 431 is nested and engaged with the second columnar block 421 again to reposition the rotating plate 42. It should be noted that during the clockwise rotation of the lower screw 22, the first nut 241 is in a free-spinning state, so the first power component 24 does not move downward.

[0052] Please see Figure 9 Two lifting mechanisms 5 are provided and arranged opposite to each other. Each mechanism includes a slide rail 51, a slider 52, a rotating column 53, and a connecting rod 54. The slider 52 is nested on the horizontally arranged slide rail 51, and the bottom surface is fixed with a downwardly extending rotating column 53. The lower end of the rotating column 53 is nested in the grooved cam 322. Horizontal assembly rods 521 are fixed on both sides of the slider 52. The lower ends of the connecting rods 54 are rotatably connected to the two assembly rods 521 respectively. The upper ends of the connecting rods 54 of the two lifting mechanisms 5 are coaxially rotatably connected to the rectangular plate 41, forming a triangular support together.

[0053] Please see Figure 10When the cam 32 of the lower transmission component 3 is driven to rotate by the first power component 24, its grooved cam 322 will alternately push the rotating column 53 of the lifting mechanism 5, causing the slider 52 to move horizontally back and forth along the slide rail 51; when the slider 52 moves, it synchronously pulls the connecting rod 54, and drives the rectangular plate 41 to rise and fall by changing the included angle of the triangular bracket; since the servo motor 23 stops after rotating counterclockwise by a set angle, the rotating column 53 can move from point A to point B and then from point B to point C with the rotation of the grooved cam 322, thereby realizing the multi-level height adjustment of the wax model tree 100;

[0054] Please see Figure 2 The top surface 11 is provided with a control panel 14, which has two buttons. The two buttons control the servo motor 23 to rotate counterclockwise and clockwise by a certain angle, respectively.

[0055] Working principle of this invention:

[0056] When the height of the wax model tree 100 needs to be adjusted, the servo motor 23 starts and rotates counterclockwise, driving the lower screw 22 to rotate. When the lower screw 22 rotates, the first power component 24 moves upward, pushing the first positioning plate 33 upward, so that the positioning groove 331 of the first positioning plate 33 separates from the first columnar block 321. When the lower control plate 25 blocks the first power component 24 from moving upward, the multiple first transmission rods 244 of the first power component 24 drive the cam 32 to rotate at a certain angle and then stop. When the cam 32 rotates, its slotted cam 322 will alternately push the rotating column 53 of the lifting mechanism 5, driving the slider 52 to move along the horizontally set... The slide rail 51 moves horizontally back and forth; when the slider 52 moves, it pulls the connecting rod 54 through the assembly rods 521 on both sides. The pulling action of the connecting rod 54 changes the included angle of the triangular bracket, thereby driving the rectangular plate 41 to rise and fall. Since the wax model tree 100 is assembled on the rotating plate 42, it moves up and down synchronously with the rectangular plate 41, ultimately realizing the lifting and lowering adjustment of the wax model tree 100. The lower spring 26 releases its elastic force to push the first power component 24 to reset downward. At this time, the first nut 241 rotates freely on the lower screw 22, and the first positioning plate 33 moves down synchronously. Its positioning groove 331 is nested and engaged with the first columnar block 321 again, repositioning the cam 32.

[0057] When the angle of the wax model tree 100 needs to be adjusted, the servo motor 23 starts and rotates clockwise, driving the upper screw 22 to rotate. When the upper screw 22 rotates, the second power component 27 moves downward, pushing the second positioning plate 43 downward, so that the positioning groove 431 of the second positioning plate 43 separates from the second columnar block 421. When the upper control plate 25 blocks the second power component 27 from moving downward, the multiple second transmission rods 274 of the second power component 27 drive the rotating plate 42 to rotate a certain angle and then stop. Since the wax model tree 100 is assembled on the rotating plate 42, the multi-angle adjustment of the wax model tree 100 is finally realized. The upper spring 26 releases its elastic force to push the second power component 27 to reset upward. At this time, the second nut 271 rotates freely on the upper screw 22, and the second positioning plate 43 moves upward synchronously. Its positioning groove 431 is nested and engaged with the second columnar block 421 again, repositioning the rotating plate 42.

[0058] Second embodiment:

[0059] The lifting drive method of the rectangular plate 41 can be replaced, and the specific solution is as follows:

[0060] Please see Figure 13-14 Several lifting columns 411 are fixed on the bottom surface of the rectangular plate 41. The original cam 32 is replaced by a second cam 34. The second cam 34 is rotatably mounted on the lower end of the assembly tube 31. Its structure consists of four protrusions extending in the vertical direction. The lifting columns 411 are tightly attached to the top surface of the second cam 34. At the same time, multiple first columnar blocks 321 are set on the wall surface of the second cam 34. When the first power component 24 drives the second cam 34 to rotate, its four protrusions will alternately push the corresponding lifting columns 411, thereby driving the rectangular plate 41 to rise and fall, realizing the height adjustment of the wax model assembly tree 100. This design can eliminate the need for the original lifting mechanism 5.

[0061] Third embodiment:

[0062] Please see Figure 1-3 The rotating plate 42 is equipped with a clamping mechanism 6 for clamping and fixing the wax module tree 100. The lower end of the feeding rod 10 is provided with multiple grooves 110 for the clamping mechanism 6 to fit and engage.

[0063] Please see Figure 11-12The clamping mechanism 6 specifically includes: a base 61, a rotating ring 62, grippers 63, and pins 64; the base 61 is fixedly mounted on the rotating plate 42, and its top surface has multiple radially distributed slides along the axis, with elastic elements 631 provided in the slides; the grippers 63 are inverted "L" shapes, and the lower ends of multiple grippers 63 are slidably embedded in each slide and connected to the elastic elements 631; the rotating ring 62 is rotatably mounted on the base 61, and its inner ring has multiple protrusions 621, and the opposite surfaces of the protrusions 621 and the grippers 63 are designed as arc surfaces; the base 61 and the rotating ring 62 have corresponding pin holes, and the pins 64 can be inserted into the pin holes to position the rotating ring 62.

[0064] Working principle of this invention:

[0065] The wax model tree 100 is manually placed on the base 61. The rotating ring 62 is rotated, and the multiple protrusions 621 on its inner side simultaneously push against the corresponding grippers 63, causing the grippers 63 to converge along the slide towards the axis of the base 61 until the ends of the grippers 63 are inserted into the grooves 110 at the lower end of the feed rod 10, thus completing the clamping and fixing of the wax model tree 100. Finally, the pin 64 is inserted into the pin hole to position and lock the rotating ring 62.

[0066] The above embodiments are merely one of the preferred embodiments of the present invention and should not be used to limit the scope of protection of the present invention. Any modifications or refinements made to the main design concept and spirit of the present invention that are not of substantial significance, but solve the same technical problem as the present invention, should be included within the scope of protection of the present invention.

Claims

1. A work cart for assembling wax model trees, comprising: The frame (1), power mechanism (2), lower transmission assembly (3), upper transmission assembly (4), and lifting mechanism (5) are characterized in that the power mechanism (2) is provided with a lower transmission assembly (3) and an upper transmission assembly (4) at its upper and lower ends. The power mechanism (2) is composed of a telescopic rod (21), a screw (22), a servo motor (23), a first power assembly (24), a second power assembly (27), a control plate (25), and a spring (26). Both ends of the telescopic rod (21) are equipped with screws (22), and the lower screw (22) is connected to the servo motor (23). The two control plates (25) are respectively connected to the two screws. (22) Connected, and each connected to a spring (26); The first power assembly (24) includes a first nut (241), a first one-way bearing (242) locked counterclockwise, a first assembly plate (243) and multiple first transmission rods (244), the first nut (241) is sleeved on the lower screw (22), and the first one-way bearing (242) connects the first nut (241) and the first assembly plate (243); The structure and connection method of the second power assembly (27) are the same as those of the first power assembly (24), the second nut (271) is sleeved on the upper screw (22), and its second one-way bearing (272) is locked clockwise; The upper transmission assembly (4) includes: a rectangular plate (41), a rotating plate (42), and a second positioning plate (43); the rectangular plate (41) is nested in the rectangular through-hole of the frame (1), the rotating plate (42) is rotatably mounted on the rectangular plate (41), and the bottom surface of the rotating plate (42) is provided with multiple second columnar blocks (421) with slots; the second positioning plate (43) is connected to the bottom surface of the rectangular plate (41) through a spring rod (432), and eight positioning slots (431) are equally spaced in the inner circle, which are nested and cooperate with the second columnar blocks (421); the free ends of multiple second transmission rods (274) of the second power assembly (27) are inserted into the corresponding slots and fit against the top surface (11) of the second positioning plate (43); When the servo motor (23) rotates clockwise, it drives the rotating plate (42) to rotate via the second power component (27); when it rotates counterclockwise, it drives the lower transmission component (3) via the first power component (24) and, together with the lifting mechanism (5), moves the rectangular plate (41) up and down.

2. A working cart for assembling wax model trees according to claim 1, characterized in that: The frame (1) includes: a top surface (11), a bottom plate (12) and multiple supports (13). The supports (13) are used to support the top surface (11) and the bottom plate (12) so that the two maintain a relatively fixed distance. The top surface (11) has a rectangular through-hole, and the bottom surface of the top surface extends vertically downward at both ends of the through-hole to provide a limit plate (15).

3. A work cart for assembling wax model trees according to claim 2, characterized in that: A handrail (16) is fitted on one side of the top surface (11), and multiple casters with locking function are installed at the bottom of the frame (1).

4. A work cart for assembling wax model trees according to claim 3, characterized in that: A control panel (14) is provided on the top surface (11). The control panel (14) has two buttons, which control the servo motor (23) to rotate counterclockwise and clockwise by a certain angle, respectively.

5. A work cart for assembling wax model trees according to claim 1, characterized in that: The lower transmission assembly (3) includes: an assembly tube (31), a cam (32), and a first positioning plate (33); the assembly tube (31) is fixed on the frame (1) and arranged coaxially with the screw (22); the cam (32) is rotatably assembled on the lower end of the assembly tube (31), and its structure is that the top surface (11) is provided with four interconnected slotted cams (322), and also provided with multiple first columnar blocks (321), the first columnar blocks (321) are provided with slots; the first positioning plate (33) is sleeved on the upper end of the assembly tube (31), the first positioning plate (33) moves up and down, and its edge is provided with multiple positioning slots (331) at equal intervals, the first columnar blocks (321) mesh with the positioning slots (331); the free ends of multiple first transmission rods (244) of the first power assembly (24) are inserted into the slots of the corresponding first columnar blocks (321) and are in contact with the bottom surface of the first positioning plate (33).

6. A working cart for assembling wax model trees according to claim 1, characterized in that: Two lifting mechanisms (5) are provided and arranged opposite to each other. They include: a slide rail (51), a slider (52), a rotating column (53) and a connecting rod (54); the slider (52) is nested on the horizontally arranged slide rail (51), and the bottom surface is fixed with a downwardly extending rotating column (53). The lower end of the rotating column (53) is nested in the grooved cam (322); horizontal assembly rods (521) are fixed on both sides of the slider (52), and the lower end of the connecting rod (54) is rotatably connected to the two assembly rods (521); the upper end of the connecting rod (54) of the two lifting mechanisms (5) is coaxially rotatably connected to the rectangular plate (41).

7. A working cart for assembling wax model trees according to claim 5, characterized in that: The lifting drive of the rectangular plate (41) can be other methods; a number of lifting columns (411) are fixed on the bottom surface of the rectangular plate (41), and the original cam (32) is replaced by cam two (34). The cam two (34) is rotated and assembled at the lower end of the assembly tube (31). Its structure consists of four protrusions extending in the vertical direction, and the number of lifting columns (411) is in contact with the top surface (11) of cam two (34).

8. A work cart for assembling wax model trees according to claim 1, characterized in that: The lower end of the feed rod (10) has multiple grooves (110).

9. A working cart for assembling wax model trees according to claim 5, characterized in that; The rotating plate (42) is provided with a clamping mechanism (6), which includes: a base (61), a rotating ring (62), a gripper (63) and a pin (64); the base (61) is fixed on the rotating plate (42), and its top surface (11) has multiple slides that are radially distributed along the axis, and elastic elements (631) are provided in the slides; the gripper (63) is in the shape of an inverted "L", and the lower ends of multiple grippers (63) are slidably embedded in each slide and connected to the elastic element (631); the rotating ring (62) is rotatably assembled on the base (61), and its inner ring has multiple protrusions (621), and the opposite surface of the protrusions (621) and the gripper (63) is an arc surface; pin holes are correspondingly provided on the base (61) and the rotating ring (62).

10. A work cart for assembling wax model trees according to claim 9, characterized in that: The base (61) and the rotating ring (62) are respectively provided with pin holes, and the pin (64) is inserted into the pin holes of the base (61) and the rotating ring (62).

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