Opening and expanding device for door of electro-tricycle

Abstract

The invention discloses an electro-tricycle door tapping and expanding device which comprises a base, a mounting frame is fixedly connected to the upper end of the base, a clamping mechanism for fixing an electro-tricycle door is mounted on the outer side of the mounting frame, and a moving mechanism for driving a tapping component to move is mounted at the upper end of the mounting frame. The lower end of the moving mechanism is provided with a grinding mechanism for conducting hole forming and grinding on the electro-tricycle door, the moving mechanism comprises a third connecting rod, and the upper end of the third connecting rod is provided with a supporting mechanism for preventing a plate from sinking and bulging when the electro-tricycle door is provided with a hole; the method has the advantages that the problems of sinking, bulging and tearing during machining of the thin metal plate car door are effectively solved, coaxiality deviation caused by secondary clamping is avoided, hole wall burrs are removed at a time, meanwhile, the method can be matched with different curved surfaces, hole opening positions and plate thicknesses of the car door, and the machining precision, the surface quality and the multi-specification adaptability are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of electric tricycle processing and manufacturing technology, specifically to a device for enlarging the opening of a door for an electric tricycle. Background Technology

[0002] Electric tricycles, as an important means of transportation for short-distance transport and daily travel, often use doors made of thin cold-rolled steel sheets or fiberglass. The door manufacturing process requires the creation of various functional holes, such as lock holes, hinge holes, and handle holes. The quality of these hole machining directly affects the assembly precision of the components and the stability of the door's use. Hole opening and diameter expansion, as a core process in door manufacturing, must simultaneously address technical challenges such as the ease of deformation of thin sheet metal, low hole diameter accuracy, and numerous burrs on the hole walls. Therefore, stringent requirements are placed on the anti-deformation capability, integrated processing level, and adaptability of the hole opening and diameter expansion device.

[0003] Patent CN113618443B discloses a processing platform for preventing deformation of thin aluminum sheets. A first perforated plate is slidably connected to a processing table. One end of a second threaded rod is rotatably connected to the second perforated plate. The first perforated plate has a second threaded hole, and the other end of the second threaded rod passes through this hole and is fixedly connected to a second handle. One end of an insert rod is fixedly connected to the bottom of the second perforated plate, and the other end passes through the first perforated plate. This invention uses an adjusting mechanism to move the first perforated plate, which in turn moves the second perforated plate, positioning it below the thin aluminum sheet processing area. Rotating the second threaded rod via the second handle, and with the insert rod's limit, moves the second perforated plate upwards, bringing its upper surface into contact with the thin aluminum sheet. This provides support to the processing area and prevents deformation of the thin aluminum sheet during processing.

[0004] However, the above technical solutions still have the following shortcomings in practical applications:

[0005] The current equipment is designed with rigid support only for thin flat plates, which cannot fit the bending and curved surfaces of car doors. The support fit is poor and the stress is uneven. Thin sheet metal is still prone to dents and bulges. It only has a single anti-deformation function and does not have an integrated structure for drilling, diameter expansion and grinding. It requires multiple processes and multiple clamping. Although it achieves a combination of drilling and grinding, it adopts a separate station design. The positioning accuracy of the secondary clamping of the car door is poor, which can easily cause hole eccentricity and elliptical hole diameter. Moreover, the grinding head is fixed in specification, making replacement cumbersome and the processing efficiency low. Its support mechanism has a fixed position and no adaptive adjustment, which cannot match different drilling positions and curved surfaces of car doors. The grinding mechanism also has no axial extension adjustment, which makes it difficult to adapt to car doors of different thicknesses. It is easy to have problems with incomplete grinding or damage to the sheet metal. Therefore, we propose a hole opening and diameter expansion device for electric tricycle doors. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The present invention solves the above-mentioned technical problems by adopting the following technical solution: It provides an electric tricycle door opening and enlarging device, including a base, a mounting bracket fixedly connected to the upper end of the base, a clamping mechanism for fixing the electric tricycle door mounted on the outer side of the mounting bracket, a moving mechanism for moving the opening component mounted on the upper end of the mounting bracket, and a grinding mechanism for grinding the electric tricycle door during opening at the lower end of the moving mechanism. The moving mechanism includes a third connecting rod, and a support mechanism for preventing the sheet metal from denting or bulging when opening the electric tricycle door is provided at the upper end of the third connecting rod.

[0008] Preferably, the clamping mechanism includes two mounting blocks fixedly connected to the mounting frame. A first motor is mounted on one end of each of the two mounting blocks that are far apart from each other. The output shaft of the first motor is fixedly connected to the housing of the first electric telescopic rod through a coupling. The output shaft of the first electric telescopic rod is fixedly connected to a worm gear through a coupling. Two symmetrical worm wheels are meshed on the outer side of the worm gear.

[0009] Preferably, the inner sides of both worm gears are rotatably connected to a mounting housing via a rotating shaft. The outer sides of the inner worm gears of the mounting housing are rotatably connected to two first connecting rods via a rotating shaft. The inner sides of the two first connecting rods are rotatably connected to a clamp via a rotating shaft. The outer sides of the clamps are rotatably connected to a second connecting rod via a rotating shaft. The inner sides of the second connecting rods are rotatably connected to the mounting housing via a rotating shaft.

[0010] Preferably, the moving mechanism includes two mounting plates fixedly connected to the mounting bracket. A second motor is mounted on one side of one of the two mounting plates. A threaded rod is fixedly connected to the output shaft of the second motor. The outer side of the threaded rod is rotatably connected to the two mounting plates. A fixed plate on one side of the cylinder is threadedly connected to the outer side of the threaded rod. A first sliding rod is slidably connected to the other side of the cylinder through the fixed plate. The outer side of the first sliding rod is fixedly connected to the two mounting plates respectively. A third connecting rod is fixedly connected to the other side of the cylinder through the fixed plate.

[0011] Preferably, the grinding mechanism includes a circular fixing plate fixedly connected to the output shaft of the cylinder. The lower end of the circular fixing plate is rotatably connected to a first sleeve via a rotating shaft. At least five assembly slots are provided around the outer side of the first sleeve. A fixing block is fixedly connected to the inner side of the first sleeve. A third motor is installed at the upper end of the fixing block. The output shaft of the third motor is fixedly connected to the outer shell of a second electric telescopic rod via a coupling. One of two strip drive plates is fixedly connected to the outer side of the outer shell of the second electric telescopic rod. The output shaft of the second electric telescopic rod is fixedly connected to the other strip drive plate.

[0012] Preferably, a fourth motor is mounted on each of the two strip drive plates at opposite ends via a fixing plate. The output shaft of the fourth motor is fixedly connected to a first gear via a rotating shaft. A second gear is meshed with the outer side of the first gear, and the inner side of the second gear is rotatably connected to the strip drive plate.

[0013] Preferably, the second gear has at least five limiting grooves evenly distributed in a ring. Each limiting groove is slidably connected to a rotating shaft. One end of each rotating shaft is fixedly connected to a second sliding rod. The outer side of the second sliding rod is slidably connected to the inner side of the strip-shaped drive plate. The ends of the multiple sets of second sliding rods that are far apart are fixedly connected to arc-shaped grinding blocks. The outer side of the arc-shaped grinding blocks is slidably connected to the assembly groove on the outer side of the first sleeve.

[0014] Preferably, a second sleeve is fixedly connected to the inner side of the second gear near the lower end of the two second gears via a rotating shaft. The outer side of the second sleeve is provided with an assembly groove corresponding to the outer side of the first sleeve. The outer side of the second sleeve is slidably connected to the inner side of the first sleeve. A drill bit is fixedly connected to the lower end of the second sleeve.

[0015] Preferably, the support mechanism includes two third electric telescopic rods installed inside the third link. The outer shells of the two third electric telescopic rods are fixedly connected to the third link. The output shafts of the third electric telescopic rods are jointly fixedly connected to a fixing ring. The upper end of the fixing ring is provided with a sliding groove, and the lower end of the fixing ring is fixedly connected to a toothed ring. Two third gears are meshed on the outer side of the toothed ring.

[0016] Preferably, the inner sides of the two third gears are rotatably connected to sliding frames via rotating shafts, the outer sides of the sliding frames are slidably connected to the groove at the upper end of the fixed ring, a fifth motor is installed at the lower end of the sliding frame, the output shaft of the fifth motor is fixedly connected to the third gears via rotating shafts, a fourth electric telescopic rod is installed at the upper end of the sliding frame, the output shaft of the fourth electric telescopic rod is hinged to a spherical universal joint, and a support pad is rotatably connected to the outer side of the spherical universal joint.

[0017] Compared with the prior art, the present invention provides a device for enlarging the opening diameter of an electric tricycle door, which has the following beneficial effects:

[0018] This electric tricycle door opening and enlarging device utilizes a precise back support and an adaptive anti-deformation structure. The support plate of the support mechanism is precisely positioned to the corresponding drilling position via a third electric telescopic rod. Combined with the fine-tuning of the fourth electric telescopic rod and the adaptive rotation of the spherical universal joint, a tight fit with the curved surface of the door is achieved. Simultaneously, the support plate provides uniform support force, effectively dispersing localized impact forces during drilling. This solves problems such as dents, bulges, and tearing at the hole edges that easily occur when processing thin sheet metal with traditional equipment, ensuring a smooth surface and structural integrity after door processing, eliminating the need for subsequent shaping and repair. The grinding mechanism adopts a coaxial design for drilling, enlarging, and grinding. A third motor drives the drill bit and the arc-shaped grinding block to rotate synchronously. After drilling, the limiting groove of the second gear drives the arc-shaped grinding block to expand radially synchronously, rotating and grinding along the hole wall, achieving a smooth surface. The one-time removal of burrs inside and outside the hole avoids coaxiality deviation caused by secondary clamping, solving pain points such as elliptical hole diameter, rough hole wall, and assembly jamming, and fully meeting the installation accuracy requirements of precision components such as door locks and hinges; the support mechanism can adapt to the opening support needs of different curved surfaces and positions of the car door through the circumferential fine adjustment of the sliding frame and the extension and retraction of the electric telescopic rod, and can achieve stable support even when processing at the bending point and arc area of ​​the car door, avoiding local deformation; the grinding mechanism can precisely adjust the grinding depth through the axial extension and retraction of the second electric telescopic rod, adapting to car door panels of different thicknesses, and the design of synchronous expansion of the arc grinding block ensures the uniformity of the hole diameter during the diameter expansion process, solving the problems of poor adaptability of existing equipment, incomplete grinding of thick plates, and easy scratching of thin plates, and greatly improving the processing compatibility and processing quality of multi-specification car doors. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic cross-sectional view of the overall structure of the present invention;

[0021] Figure 3 This is a partial structural cross-sectional view of the present invention;

[0022] Figure 4 This is a cross-sectional view of the clamping mechanism of the present invention;

[0023] Figure 5 For the present invention Figure 3 Enlarged diagram of part A in the middle;

[0024] Figure 6 This is a cross-sectional view of the grinding mechanism of the present invention;

[0025] Figure 7 For the present invention Figure 3 Enlarged diagram of section B;

[0026] Figure 8 This is a cross-sectional view of the support mechanism of the present invention.

[0027] In the diagram: 1. Base; 2. Mounting bracket; 3. Clamping mechanism; 31. Mounting block; 32. First motor; 33. First electric telescopic rod; 34. Worm gear; 35. Worm wheel; 36. Mounting housing; 37. First connecting rod; 38. Second connecting rod; 39. Clamp; 4. Moving mechanism; 41. Mounting plate; 42. Second motor; 43. Threaded rod; 44. Cylinder; 45. First sliding rod; 46. Third connecting rod; 5. Grinding mechanism; 51. Circular fixing plate; 52. First sleeve; 53. Fixing block; 54. Third motor 55. Second electric telescopic rod; 56. Strip drive plate; 57. Fourth motor; 58. First gear; 59. Second gear; 510. Limiting groove; 511. Second slide rod; 512. Rotating shaft; 513. Arc grinding block; 514. Second sleeve; 515. Drill bit; 6. Support mechanism; 61. Third electric telescopic rod; 62. Fixing ring; 63. Gear ring; 64. Third gear; 65. Sliding frame; 66. Fifth motor; 67. Fourth electric telescopic rod; 68. Spherical universal joint; 69. Support pad. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figure 1-8 An electric tricycle door opening and enlarging device includes a base 1, a mounting bracket 2 fixedly connected to the upper end of the base 1, a clamping mechanism 3 for fixing the electric tricycle door is installed on the outer side of the mounting bracket 2, a moving mechanism 4 for moving the opening component is installed at the upper end of the mounting bracket 2, a grinding mechanism 5 for grinding the electric tricycle door during opening is installed at the lower end of the moving mechanism 4, and the moving mechanism 4 includes a third connecting rod 46, a support mechanism 6 for preventing the sheet metal from denting or bulging when opening the electric tricycle door is installed at the upper end of the third connecting rod 46.

[0030] In this embodiment, the clamping mechanism 3 includes two mounting blocks 31 fixedly connected to the mounting frame 2. A first motor 32 is mounted on one end of each mounting block 31 that is far apart from each other. The output shaft of the first motor 32 is fixedly connected to the housing of the first electric telescopic rod 33 through a coupling. The output shaft of the first electric telescopic rod 33 is fixedly connected to a worm gear 34 through a coupling. Two symmetrical worm wheels 35 are meshed on the outer side of the worm gear 34.

[0031] Specifically, the mounting block 31 is used to fix the first motor 32 and provide a mounting base for the clamping drive component; the first motor 32 is used to output rotational power to drive the worm 34 to rotate; the first electric telescopic rod 33 is used to drive the worm 34 to move axially, so as to achieve precise fine adjustment of the meshing position between the worm 34 and the worm wheel 35; the worm 34 is used to mesh with the worm wheel 35, transmit rotational power to the worm wheel 35, and drive the worm wheel 35 to rotate synchronously.

[0032] In this embodiment, the inner sides of the two worm gears 35 are rotatably connected to the mounting housing 36 via a rotating shaft. The outer sides of the inner worm gears 35 of the mounting housing 36 are rotatably connected to two first connecting rods 37 via a rotating shaft. The inner sides of the two first connecting rods 37 are rotatably connected to a clamp 39 via a rotating shaft. The outer sides of the clamp 39 are rotatably connected to a second connecting rod 38 via a rotating shaft. The inner sides of the second connecting rod 38 are rotatably connected to the mounting housing 36 via a rotating shaft.

[0033] Specifically, the worm gear 35 is used to convert rotational motion into oscillating power of the linkage mechanism; the mounting housing 36 provides rotational support for the first link 37 and the second link 38 to ensure the stability of the linkage mechanism; the first link 37 is used to transmit power from the worm gear 35 and to traction the clamping fixture 39 for clamping displacement; the second link 38, together with the first link 37 and the mounting housing 36, forms a four-bar linkage limiting structure to ensure the smooth movement of the clamping fixture 39; the clamping fixture 39 is used to directly clamp and fix the electric tricycle door to prevent the door from shifting during processing.

[0034] In this embodiment, the moving mechanism 4 includes two mounting plates 41 fixedly connected to the mounting frame 2. A second motor 42 is mounted on one side of one of the mounting plates 41. A threaded rod 43 is fixedly connected to the output shaft of the second motor 42. The outer side of the threaded rod 43 is rotatably connected to the two mounting plates 41. A fixing plate on one side of a cylinder 44 is threadedly connected to the outer side of the threaded rod 43. A first sliding rod 45 is slidably connected to the other side of the cylinder 44 through the fixing plate. The outer side of the first sliding rod 45 is fixedly connected to the two mounting plates 41 respectively. A third connecting rod 46 is fixedly connected to the other side of the cylinder 44 through the fixing plate.

[0035] Specifically, the mounting plate 41 is used to support and mount the second motor 42, the threaded rod 43, and the first slide rod 45, forming the frame foundation of the moving mechanism 4; the second motor 42 is used to output rotational power for lateral movement, driving the threaded rod 43 to rotate; the threaded rod 43 drives the cylinder 44 to move laterally through threaded transmission, realizing the adjustment of the processing position; the cylinder 44 is used to drive the grinding mechanism 5 to feed vertically, and at the same time provides a fixed foundation for the third connecting rod 46; the first slide rod 45 is used to guide and limit the lateral movement of the cylinder 44, ensuring smooth movement without deviation; the third connecting rod 46 is used to synchronously connect the cylinder 44 and the support mechanism 6, ensuring that the support points of the grinding mechanism 5 and the support mechanism 6 are longitudinally coaxially aligned.

[0036] In this embodiment, the grinding mechanism 5 includes a circular fixing plate 51 fixedly connected to the output shaft of the cylinder 44. The lower end of the circular fixing plate 51 is rotatably connected to a first sleeve 52 via a rotating shaft. At least five assembly slots are provided around the outer side of the first sleeve 52. A fixing block 53 is fixedly connected to the inner side of the first sleeve 52. A third motor 54 is installed at the upper end of the fixing block 53. The output shaft of the third motor 54 is fixedly connected to the outer shell of the second electric telescopic rod 55 via a coupling. One of the two strip drive plates 56 is fixedly connected to the outer side of the outer shell of the second electric telescopic rod 55. The output shaft of the second electric telescopic rod 55 is fixedly connected to the other strip drive plate 56.

[0037] Specifically, the circular fixing plate 51 is used to connect the cylinder 44 and the first sleeve 52, providing a top fixing base for the grinding mechanism 5; the first sleeve 52 is used to provide installation space for internal components and to provide sliding guide for the arc grinding block 513; the fixing block 53 is used to fix and install the third motor 54, ensuring that the drive components are installed firmly; the third motor 54 is used to output the total rotational power for drilling and grinding, driving the second electric telescopic rod 55 to rotate as a whole; the second electric telescopic rod 55 is used to drive the strip drive plate 56 to extend and retract axially, adjusting the grinding depth to adapt to different thicknesses of car doors; the strip drive plate 56 is used to install grinding drive-related components, providing structural support for radial diameter expansion grinding.

[0038] In this embodiment, a fourth motor 57 is mounted on each of the two strip drive plates 56 at opposite ends via a fixing plate. The output shaft of the fourth motor 57 is fixedly connected to a first gear 58 via a rotating shaft. A second gear 59 is meshed with the outer side of the first gear 58, and the inner side of the second gear 59 is rotatably connected to the strip drive plate 56.

[0039] Specifically, the strip drive plate 56 provides mounting support for the fourth motor 57, the first gear 58, and the second gear 59; the fourth motor 57 is used to output the diameter expansion grinding power to drive the first gear 58 to rotate; the first gear 58 is used to mesh with the second gear 59 to transmit rotational power; the second gear 59 is used to drive the second slide rod 511 to make radial movement by rotating itself in conjunction with the limiting groove 510.

[0040] In this embodiment, at least five limiting grooves 510 are evenly distributed in a ring on the second gear 59. A rotating shaft 512 is slidably connected in each limiting groove 510. A second slide rod 511 is fixedly connected to one end of each rotating shaft 512. The outer side of the second slide rod 511 is slidably connected to the inner side of the strip drive plate 56. An arc-shaped grinding block 513 is fixedly connected to the far end of the multiple sets of second slide rods 511. The outer side of the arc-shaped grinding block 513 is slidably connected to the assembly groove on the outer side of the first sleeve 52.

[0041] Specifically, the second gear 59 provides motion trajectory constraints for the rotating shaft 512 through the limiting groove 510; the limiting groove 510 is used to guide the rotating shaft 512 to perform radial extension and retraction; the rotating shaft 512 is used to connect the limiting groove 510 and the second slide rod 511 to achieve sliding fit and power transmission; the second slide rod 511 is used to transmit radial power and drive the arc surface grinding block 513 to open synchronously; the arc surface grinding block 513 is used to enlarge the diameter, grind, and deburr the inner wall of the drill hole; the assembly groove of the first sleeve 52 is used to slide and limit the arc surface grinding block 513 to ensure smooth grinding movement.

[0042] In this embodiment, a second sleeve 514 is fixedly connected to the inner side of the second gear 59 near the lower end of the two second gears 59 via a rotating shaft. The outer side of the second sleeve 514 is provided with an assembly groove corresponding to the outer side of the first sleeve 52. The outer side of the second sleeve 514 is slidably connected to the inner side of the first sleeve 52. A drill bit 515 is fixedly connected to the lower end of the second sleeve 514.

[0043] Specifically, the second gear 59 is used to drive the second sleeve 514 to rotate synchronously and transmit drilling power; the second sleeve 514 is used to fix the drill bit 515 and simultaneously slides with the first sleeve 52 to achieve axial extension and retraction; the first sleeve 52 is used to provide coaxial sliding guidance for the second sleeve 514 to ensure the coaxiality of the drilling; the drill bit 515 is used to perform initial drilling operations on the car door to complete the opening process.

[0044] In this embodiment, the support mechanism 6 includes two third electric telescopic rods 61 installed inside the third link 46. The outer shells of the two third electric telescopic rods 61 are fixedly connected to the third link 46. The output shafts of the third electric telescopic rods 61 are fixedly connected to a fixing ring 62. The upper end of the fixing ring 62 is provided with a sliding groove, and the lower end of the fixing ring 62 is fixedly connected to a toothed ring 63. Two third gears 64 are meshed on the outer side of the toothed ring 63.

[0045] Specifically, the third link 46 is used to fix the third electric telescopic rod 61, providing an overall installation base for the support mechanism 6; the third electric telescopic rod 61 is used to drive the fixed ring 62 to rise and fall vertically, adjusting the height of the support pad 69 to fit the back of the door; the fixed ring 62 is used to open a groove to provide circumferential motion guidance for the sliding frame 65, and at the same time fix the gear ring 63; the gear ring 63 is used to mesh with the third gear 64 to drive the sliding frame 65 to make circumferential fine adjustments; the third gear 64 is used to transmit power to the fifth motor 66 to realize the position adjustment of the sliding frame 65.

[0046] In this embodiment, the inner sides of the two third gears 64 are respectively rotatably connected to sliding frames 65 via rotating shafts. The outer side of the sliding frame 65 is slidably connected to the groove at the upper end of the fixed ring 62. A fifth motor 66 is installed at the lower end of the sliding frame 65. The output shaft of the fifth motor 66 is fixedly connected to the third gears 64 via rotating shafts. A fourth electric telescopic rod 67 is installed at the upper end of the sliding frame 65. The output shaft of the fourth electric telescopic rod 67 is hinged to a spherical universal joint 68. A support pad 69 is rotatably connected to the outer side of the spherical universal joint 68.

[0047] Specifically, the third gear 64 meshes with the gear ring 63, driving the sliding frame 65 to move in a circular motion along the groove of the fixed ring 62; the sliding frame 65 is used to install the fifth motor 66 and the fourth electric telescopic rod 67, providing a mounting carrier for the support fine-tuning components; the fifth motor 66 is used to output the circular fine-tuning power to drive the third gear 64 to rotate; the fourth electric telescopic rod 67 is used to further adjust the support height of the support plate 69 to adapt to the curved surface of the car door; the spherical universal joint 68 is used to realize the adaptive rotation of the support plate 69 to ensure a tight fit with the curved surface of the car door; the support plate 69 is used to directly support the back of the car door, dispersing the drilling impact force and preventing the plate from denting or bulging; the groove of the fixed ring 62 is used to limit the circular motion of the sliding frame 65 to ensure accurate fine-tuning of the support point position.

[0048] During operation, the electric tricycle door is first placed inside the mounting bracket 2, in the middle of the two clamping mechanisms 3. Then, the first electric telescopic rod 33 is activated, and its output shaft drives the worm gear 34 to finely adjust the meshing position along the axial direction to ensure that the worm gear 34 is precisely meshed with the two worm wheels 35. Next, the first motor 32 on the outside of the mounting block 31 is activated, and its output shaft drives the worm gear 34 to rotate through the coupling. The rotating worm gear 34 drives the two symmetrical worm wheels 35 to rotate synchronously. The worm wheels 35 drive the first connecting rod 37 to swing inward through the rotating shaft. The first connecting rod 37 pulls the clamp 39 to move towards the door through the rotating shaft. When the clamp 39 moves, it drives the second connecting rod 38 to swing synchronously through the rotating shaft. Under the fixed limiting action of the mounting housing 36, the two clamps 39 achieve stable synchronous clamping, thereby firmly fixing the door.

[0049] Then, the second motor 42 installed on one side of the mounting plate 41 is started. Its output shaft drives the threaded rod 43 to rotate. The threaded rod 43 forms a threaded transmission with the fixed plate on one side of the cylinder 44, driving the cylinder 44 to move smoothly along the outer track of the first slide rod 45 through the fixed plate on the other side. When the cylinder 44 moves, it drives the grinding mechanism 5 and the support mechanism 6 to move synchronously through the third connecting rod 46, ensuring that the drilling center of the grinding mechanism 5 and the longitudinal position of the support point of the support mechanism 6 are always aligned.

[0050] Once the target opening position is reached, the support mechanism 6 is activated first: the output shafts of the two third electric telescopic rods 61 jointly drive the fixed ring 62 and the gear ring 63 to move downwards to match the height of the back of the car door, so that the support pad 69 fits against the corresponding position of the drill hole on the back of the car door; by adjusting the extension and retraction of the fourth electric telescopic rod 67, in conjunction with the adaptive rotation of the ball joint 68, the support pad 69 is kept in close contact with the surface of the car door to form a stable support and prevent the plate from denting or bulging during drilling; if a fine adjustment of the support position is required, the two fifth motors 66 can be activated simultaneously, and their output shafts drive the third gear 64 to rotate. The third gear 64 meshes with the gear ring 63 to drive the sliding frame 65 to make a small circular motion along the groove at the upper end of the fixed ring 62, and precisely adjust the support point of the support pad 69;

[0051] After the support mechanism 6 is in place, the cylinder 44 is activated, and its output shaft drives the grinding mechanism 5 to move downward, so that the drill bit 515 fits with the opening mark on the front of the door; then the third motor 54 installed on the upper end of the fixed block 53 is activated, and its output shaft drives the second electric telescopic rod 55 and the first sleeve 52 to rotate synchronously through the coupling. The first sleeve 52 drives the second sleeve 514 and the drill bit 515 below to rotate at high speed. With the smooth feed of the cylinder 44, precise drilling is achieved.

[0052] After drilling is completed, the third motor 54 is kept rotating at a constant speed, and the two fourth motors 57 are started simultaneously. Their output shafts drive the first gear 58 to rotate through the rotating shaft. Since the first gear 58 meshes with the second gear 59, the second gear 59 rotates synchronously. The annularly distributed limiting grooves 510 on the second gear 59 form a sliding fit with the rotating shaft 512 at the end of the second slide rod 511. When the gear rotates, the rotating shaft 512 moves radially outward along the trajectory of the limiting grooves 510, pushing the second slide rod 511 to slide along the inner side of the strip drive plate 56. Finally, it drives the arc surface grinding block 513 to be pushed outward synchronously until it is aligned with the assembly groove on the outer side of the first sleeve 52. The inner wall of the drilled hole is rotated and ground to remove burrs and calibrate the hole diameter. If the thickness of the car door is different, the extension and retraction of the second electric telescopic rod 55 can be adjusted to drive the second sleeve 514 to slide axially along the inner side of the first sleeve 52, and the grinding depth of the arc surface grinding block 513 can be adjusted to ensure that it is suitable for drilling of car doors of different thicknesses.

[0053] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0054] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for enlarging the opening of a door on an electric tricycle, comprising a base (1), characterized in that: The upper end of the base (1) is fixedly connected to the mounting bracket (2). The outer side of the mounting bracket (2) is equipped with a clamping mechanism (3) for fixing the electric tricycle door. The upper end of the mounting bracket (2) is equipped with a moving mechanism (4) for moving the opening component. The lower end of the moving mechanism (4) is equipped with a grinding mechanism (5) for grinding the electric tricycle door. The moving mechanism (4) includes a third link (46). The upper end of the third link (46) is equipped with a support mechanism (6) to prevent the plate from denting or bulging when the electric tricycle door is opened.

2. The electric tricycle door opening and diameter expansion device according to claim 1, characterized in that: The clamping mechanism (3) includes two mounting blocks (31) fixedly connected to the mounting frame (2). A first motor (32) is mounted on one end of each of the two mounting blocks (31) that is far apart from each other. The output shaft of the first motor (32) is fixedly connected to the housing of the first electric telescopic rod (33) through a coupling. The output shaft of the first electric telescopic rod (33) is fixedly connected to a worm (34) through a coupling. Two symmetrical worm wheels (35) are meshed on the outer side of the worm (34).

3. The electric tricycle door opening and diameter expansion device according to claim 2, characterized in that: The inner sides of the two worm gears (35) are rotatably connected to the mounting housing (36) via a rotating shaft. The outer sides of the inner worm gears (35) of the mounting housing (36) are rotatably connected to two first connecting rods (37) via a rotating shaft. The inner sides of the two first connecting rods (37) are rotatably connected to a clamp (39) via a rotating shaft. The outer sides of the clamp (39) are rotatably connected to a second connecting rod (38) via a rotating shaft. The inner sides of the second connecting rod (38) are rotatably connected to the mounting housing (36) via a rotating shaft.

4. The electric tricycle door opening and diameter expansion device according to claim 1, characterized in that: The moving mechanism (4) includes two mounting plates (41) fixedly connected to the mounting bracket (2). A second motor (42) is mounted on one side of one of the mounting plates (41). The output shaft of the second motor (42) is fixedly connected to a threaded rod (43). The outer side of the threaded rod (43) is rotatably connected to the two mounting plates (41). The outer side of the threaded rod (43) is threadedly connected to a fixing plate on one side of a cylinder (44). The other side of the cylinder (44) is slidably connected to a first sliding rod (45) through the fixing plate. The outer side of the first sliding rod (45) is fixedly connected to the two mounting plates (41) respectively. The other side of the cylinder (44) is fixedly connected to a third connecting rod (46) through the fixing plate.

5. The electric tricycle door opening and diameter expansion device according to claim 1, characterized in that: The grinding mechanism (5) includes a circular fixing plate (51) fixedly connected to the output shaft of the cylinder (44). The lower end of the circular fixing plate (51) is rotatably connected to a first sleeve (52) via a rotating shaft. At least five assembly slots are provided around the outer side of the first sleeve (52). A fixing block (53) is fixedly connected to the inner side of the first sleeve (52). A third motor (54) is installed at the upper end of the fixing block (53). The output shaft of the third motor (54) is fixedly connected to the outer shell of a second electric telescopic rod (55) via a coupling. One of two strip drive plates (56) is fixedly connected to the outer side of the outer shell of the second electric telescopic rod (55). The output shaft of the second electric telescopic rod (55) is fixedly connected to the other strip drive plate (56).

6. The electric tricycle door opening and diameter expansion device according to claim 5, characterized in that: A fourth motor (57) is mounted on one of the two strip drive plates (56) at opposite ends via a fixing plate. The output shaft of the fourth motor (57) is fixedly connected to a first gear (58) via a rotating shaft. A second gear (59) is meshed with the outer side of the first gear (58). The inner side of the second gear (59) is rotatably connected to the strip drive plate (56).

7. The electric tricycle door opening and diameter expansion device according to claim 6, characterized in that: The second gear (59) has at least five limiting grooves (510) evenly distributed in a ring. Each limiting groove (510) is slidably connected to a rotating shaft (512). One end of each rotating shaft (512) is fixedly connected to a second slide rod (511). The outer side of the second slide rod (511) is slidably connected to the inner side of the strip drive plate (56). The ends of multiple sets of second slide rods (511) that are far apart are fixedly connected to arc-shaped grinding blocks (513). The outer side of the arc-shaped grinding blocks (513) is slidably connected to the assembly groove on the outer side of the first sleeve (52).

8. The electric tricycle door opening and diameter expansion device according to claim 6, characterized in that: A second sleeve (514) is fixedly connected to the inner side of the second gear (59) near the lower end of the two second gears (59) via a rotating shaft. The outer side of the second sleeve (514) is provided with an assembly groove corresponding to the outer side of the first sleeve (52). The outer side of the second sleeve (514) is slidably connected to the inner side of the first sleeve (52). A drill bit (515) is fixedly connected to the lower end of the second sleeve (514).

9. The electric tricycle door opening and diameter expansion device according to claim 1, characterized in that: The support mechanism (6) includes two third electric telescopic rods (61) installed inside the third link (46). The outer shells of the two third electric telescopic rods (61) are fixedly connected to the third link (46). The output shafts of the third electric telescopic rods (61) are fixedly connected to a fixing ring (62). The upper end of the fixing ring (62) is provided with a sliding groove. The lower end of the fixing ring (62) is fixedly connected to a toothed ring (63). The outer side of the toothed ring (63) is meshed with two third gears (64).

10. The electric tricycle door opening and diameter expansion device according to claim 9, characterized in that: The inner sides of the two third gears (64) are respectively rotatably connected to sliding frames (65) via rotating shafts. The outer side of the sliding frame (65) is slidably connected to the upper groove of the fixed ring (62). The lower end of the sliding frame (65) is equipped with a fifth motor (66). The output shaft of the fifth motor (66) is fixedly connected to the third gear (64) via rotating shafts. The upper end of the sliding frame (65) is equipped with a fourth electric telescopic rod (67). The output shaft of the fourth electric telescopic rod (67) is hinged to a spherical universal joint (68). The outer side of the spherical universal joint (68) is rotatably connected to a support pad (69).

Images