Electric telescopic guide plate device for welfare car

Abstract

This utility model relates to the field of welfare vehicle technology, specifically to an electric telescopic guide plate device for welfare vehicles. It includes a frame, a guide plate, and a limiting baffle. An installation space is formed within the frame, and guide strips are arranged on both sides of the installation space. A connecting guide block is arranged at the end of the guide strip near the vehicle door. The guide surface of the guide block includes a horizontal section higher than the bottom surface of the guide strip and a sloping section connecting the bottom surface of the guide strip and the horizontal section. The guide plate is movably disposed within the frame. A pulley at the rear end of the guide plate engages with the bottom surface of the guide strip and the guide surface of the guide block before the guide plate extends out of the frame. The limiting baffle is fixed at the exit of the installation space to limit the guide plate after it extends out of the installation space. A protruding anti-scratch guide wheel is mounted on the limiting baffle. The anti-scratch guide wheel is offset from the guide block, and the guide wheel surface of the anti-scratch guide wheel engages with the upper surface of the guide plate. This invention solves the technical problems of existing telescopic guide plates for welfare vehicles requiring high-torque motors and having easily scratched upper surfaces.

Description

Technical Field

[0001] This utility model relates to the field of welfare vehicle technology, specifically to an electric telescopic guide plate device for welfare vehicles. Background Technology

[0002] Welfare vehicles are specifically designed for people with disabilities. Compared to ordinary vehicles, welfare vehicles are equipped with a guide plate at the door. The guide plate is installed inside the vehicle body via a mounting frame. After extending from inside the vehicle, the guide plate rests between the ground and the lowest step of the door, acting as a bridge to facilitate wheelchair access. However, in existing welfare vehicles, the guide plate needs to pass through a guide groove with a large slope inside the mounting frame when extending from the mounting frame. The guide groove has three sections: a large inclined section, a horizontal section, and another large inclined section. The two large inclined sections face opposite directions, causing the force component acting on the guide plate on one of the large inclined sections to be opposite to the direction of extension. This wastes motor torque, requiring a high-torque motor, and the surface of the guide plate is easily scratched by the mounting frame during extension. Summary of the Invention

[0003] In order to solve the technical problems of the existing technology that the telescopic guide plate of welfare vehicles needs to be equipped with a high torque motor and the upper surface is easily scratched, this application proposes an electric telescopic guide plate device for welfare vehicles, which solves the above two technical problems.

[0004] The technical solution adopted by this utility model to solve its technical problem is: This utility model provides an electric telescopic guide plate device for welfare vehicles, comprising: a frame, the frame being installed inside the vehicle body near the door, the frame forming an installation space, guide strips being arranged on both sides of the installation space, a connecting guide block being arranged at the end of the guide strip near the door, the bottom of the guide block forming a guide surface, the guide surface including a horizontal section higher than the bottom surface of the guide strip, and a sloping section connecting the bottom surface of the guide strip and the horizontal section; a guide plate, the guide plate being movably arranged within the installation space of the frame, a pulley at the rear end of the guide plate engaging with the bottom surface of the guide strip and the guide surface of the guide block before the guide plate extends out of the frame; and a limiting baffle, the limiting baffle being fixed at the exit of the installation space to limit the guide plate after it extends out of the installation space, the limiting baffle being equipped with a protruding anti-scratch guide wheel, the anti-scratch guide wheel being offset from the guide block, and the guide wheel surface of the anti-scratch guide wheel engaging with the upper plate surface of the guide plate.

[0005] Furthermore, a drive block is configured within the frame to move linearly within the installation space, thereby driving the guide plate to extend and retract from the frame. The guide plate is connected to the drive block via a latching member. The first end of the latching member is hinged to the rear end of the guide plate, and a pulley is configured at the hinge. The second end of the latching member is hinged to the drive block, and a torsion spring is configured at the hinge to automatically flip and engage with the limiting baffle after the guide plate extends out of the installation space.

[0006] Furthermore, the frame also includes a driving device for driving the driving block. The driving device comprises: a single-sided cylindrical rack rotatably disposed within the frame, the extending direction of the single-sided cylindrical rack being the same as the movement direction of the guide plate, one end of the single-sided cylindrical rack being disposed on the limiting baffle as a switching turning end, a clearance hole being formed on the outer surface of the limiting baffle, and the switching turning end being disposed within the clearance hole for easy turning to switch between manual and electric modes; and a driving gear disposed on the single-sided cylindrical rack. On the first side of the rack, in electric mode, the drive gear meshes with the single-sided rack of the single-sided cylindrical rack, and the drive motor that drives the drive gear is connected to the drive block and moves with the drive block. In manual mode, the single-sided cylindrical rack is rotated, and the drive gear abuts against the arc surface of the single-sided cylindrical rack and disengages from the single-sided rack. A roller is disposed on the second side of the single-sided cylindrical rack and abuts against the arc surface of the single-sided cylindrical rack via an elastic element. The roller is connected to the drive block and moves with the drive block.

[0007] Furthermore, a connecting piece is fixed on the drive block, and the mounting base of the drive motor is connected to the connecting piece; a support rod is configured on the connecting piece, one end of the support rod is hinged to the connecting piece, and the roller is configured on the other end. At the same time, the elastic element is connected to the support rod, one end of the elastic element is connected to the support rod, and the other end is connected to the mounting base of the drive motor. Under the tension of the elastic element, the roller on the support rod always abuts against the single-sided cylindrical rack.

[0008] Furthermore, the guide wheel surface of the anti-scratch guide wheel protrudes from the inner side, bottom, and outer side of the limiting baffle.

[0009] Furthermore, there are two sets of anti-scratch guide wheels, both distributed in the middle section of the limiting baffle.

[0010] Based on the above technical solution, the technical effects that this utility model can achieve are as follows: This utility model relates to an electric telescopic guide plate device for welfare vehicles. The guide block has two sections, and the extension direction of these two sections is consistent with the direction of the guide plate's release from the frame. Compared with the previous three-section type, it eliminates the section that would waste motor torque, making it suitable for low-torque motors. The guide plate also releases from the frame more quietly. At the same time, the limiting baffle is equipped with a protruding anti-scratch guide wheel. The guide wheel surface of the anti-scratch guide wheel cooperates with the upper plate surface of the guide plate and the fastener to assist the guide plate in releasing from the frame, so that the upper plate surface of the guide plate will no longer be scratched by the limiting baffle, and noise can also be reduced. This utility model discloses an electric telescopic guide plate device for welfare vehicles. The extension and retraction of the guide plate frame can be performed in either electric or manual mode driven by the motor. Simply rotate the single-sided cylindrical rack to disengage it from the drive gear. More importantly, the switching is achieved by turning the switching end at the clearance hole on the outer side of the limiting baffle fixed at the exit of the installation space. Compared to the prior art where the switching device is located in the part of the frame that is deep into the vehicle body, there is no need to make special adjustments to the internal structure of the vehicle, which is convenient for car manufacturers to install. Moreover, the method of turning the single-sided cylindrical rack by turning the switching end is more stable and easier to operate. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of the electric telescopic guide plate device for welfare vehicles of this utility model. Figure 2 This is a top view of the electric telescopic guide plate device for welfare vehicles of this utility model when the guide plate is not extended; Figure 3 for Figure 1 A magnified view of a portion of the switching and twisting end; Figure 4 for Figure 2 Cross-sectional view along the AA direction; Figure 5 for Figure 4 A magnified view of a section of the guide block; Figure 6 This is a top view of the guide plate portion of the electric telescopic guide plate device for welfare vehicles of this utility model after it extends out of the frame; Figure 7 for Figure 6 Cross-sectional view along the BB direction; Figure 8 for Figure 7 Enlarged view of the middle guide block Figure 9 The guide plate of the electric telescopic guide plate device for welfare vehicles of this utility model is in Figure 8 A magnified view of the guide block as the device continues to extend from its current position. Figure 10 This is a partial enlarged view of the buckle at the end of the electric telescopic guide plate device for welfare vehicles of this utility model after the guide plate extends out of the frame; Figure 11 A schematic diagram of the drive unit.

[0012] In this utility model: 1-frame, 12-guide strip, 13-guide block, 131-horizontal section, 132-slope section, 14-drive block; 2-Guide plate, 21-Pulley, 22-Snap fastener, 23-Torsion spring; 3-Limit baffle, 31-Anti-scratch guide wheel, 32-Lean-out hole; 4-Drive device, 41-Single-sided cylindrical rack, 411-Switching turning end, 42-Drive gear, 421-Drive motor, 422-Mounting base, 43-Roller, 431-Support rod, 44-Connecting piece, 45-Elastic element. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0014] like Figure 1-11 As shown, this utility model provides an electric telescopic guide plate device for welfare vehicles, including a frame 1, a guide plate 2, and a limiting baffle 3. The frame 1 is installed inside the vehicle body near the door. An installation space is formed inside the frame 1, and guide strips 12 are arranged on both sides of the installation space. A connecting guide block 13 is arranged at the end of the guide strip 12 near the door. The bottom of the guide block 13 forms a guide surface, which includes a horizontal section 131 with a height higher than the bottom surface of the guide strip 12, and a section connecting the bottom surface of the guide strip 12 and the horizontal section. In the ramp section 132 between 131, the guide plate 2 is movably configured within the installation space of the frame 1. Before the guide plate 2 extends out of the frame 1, the pulley 21 at the rear end of the guide plate 2 engages with the bottom surface of the guide strip 12 and the guide surface of the guide block 13. The limiting baffle 3 is fixed at the exit of the installation space to limit the guide plate 2 after it extends out of the installation space. The limiting baffle 3 is equipped with a protruding anti-scratch guide wheel 31. The anti-scratch guide wheel 31 is staggered with the guide block 13, and the guide wheel surface of the anti-scratch guide wheel 31 engages with the upper plate surface of the guide plate 2.

[0015] In a specific embodiment of this utility model, a drive block 14 that moves linearly within the installation space is arranged inside the frame 1 to drive the guide plate 2 to extend and retract from the frame 1. The guide plate 2 is connected to the drive block 14 via a buckle 22. The first end of the buckle 22 is hinged to the rear end of the guide plate 2, and a pulley 21 is arranged at the hinge. The second end of the buckle 22 is hinged to the drive block 14, and a torsion spring 23 is arranged at the hinge so that the guide plate 2 can automatically flip and fasten onto the limiting baffle 3 after it extends out of the installation space. The hook of the buckle 22 is misaligned with the anti-scratch guide wheel 31.

[0016] In one specific embodiment of this utility model, a driving device 4 for driving the driving block 14 is also configured inside the frame 1. The driving device 4 includes a single-sided cylindrical rack 41, a driving gear 42, and a roller 43. The single-sided cylindrical rack 41 is rotatably configured inside the frame 1. The extension direction of the single-sided cylindrical rack 41 is the same as the movement direction of the guide plate 2. One end of the single-sided cylindrical rack 41 is configured on the limiting baffle 3 to form a switching screwing end 411. A clearance hole 32 is formed on the outer surface of the limiting baffle 3. The switching screwing end 411 is configured in the clearance hole 32 to facilitate screwing. Preferably, the end face of the switching screwing end 411 does not protrude from the outer surface of the limiting baffle 3. A gap is left between the outer periphery of the switching screwing end 411 and the inner wall of the clearance hole 32 to facilitate the insertion of tools such as sleeves. The locating hole 32 is fitted onto the switching screwing end 411 to rotate the single-sided cylindrical rack 41, thereby switching between manual and electric modes. The drive gear 42 is configured on the first side of the single-sided cylindrical rack 41. In electric mode, the drive gear 42 meshes with the single-sided rack of the single-sided cylindrical rack 41. The drive motor 421 driving the drive gear 42 is connected to the drive block 14 and moves with the drive block 14. In manual mode, the single-sided cylindrical rack 41 is rotated, and the drive gear 42 abuts against the arc surface of the single-sided cylindrical rack 41 and disengages from the single-sided rack of the single-sided cylindrical rack 41. The roller 43 is configured on the second side of the single-sided cylindrical rack 41 and abuts against the arc surface of the single-sided cylindrical rack 41 through the elastic element 45. The roller 43 is connected to the drive block 14 and moves with the drive block 14. In electric mode, the drive gear 42 meshes with the single-sided rack of the single-sided cylindrical rack 41, and the drive motor 421 drives the guide plate 2 to move. In manual mode, the single-sided cylindrical rack 41 is rotated, and the drive gear 42 contacts the arc surface of the single-sided cylindrical rack 41 and no longer meshes with the single-sided rack, so that the drive device 4 can no longer drive the guide plate 2. At this time, the guide plate 2 can be dragged by hand.

[0017] Specifically, a connecting piece 44 is fixed to the back guide plate 2 of the drive block 14, and the mounting base 422 of the drive motor 421 is connected to the connecting piece 44. A support rod 431 is configured on the connecting piece 44. One end of the support rod 431 is hinged to the connecting piece 44, and a roller 43 is configured on the other end. At the same time, an elastic element 45 is connected to the support rod 431. One end of the elastic element 45 is connected to the support rod 431, and the other end is connected to the mounting base 422 of the drive motor 421. Under the pulling force of the elastic element 45, the roller 43 on the support rod 431 always abuts against the single-sided cylindrical rack 41. After the single-sided cylindrical rack 41 rotates, it will push the roller 43 away from the drive motor 421 to ensure that the rotation of the single-sided cylindrical rack 41 is not limited.

[0018] In one specific embodiment of this utility model, the guide wheel surface of the anti-scratch guide wheel 31 protrudes from the inner side, bottom and outer side of the limiting baffle 3.

[0019] In one specific embodiment of this utility model, there are two sets of anti-scratch guide wheels 31, which are evenly distributed in the middle section of the limiting baffle 3.

[0020] It should be understood that the specific embodiments described above are only for explaining the present invention and are not intended to limit the present invention. Obvious variations or modifications derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims

1. An electric telescopic guide plate device for welfare vehicles, characterized in that, include: A frame (1) is installed in the vehicle body near the door. An installation space is formed inside the frame (1). Guide strips (12) are arranged on both sides of the installation space. A connecting guide block (13) is arranged at one end of the guide strip (12) near the door. The bottom of the guide block (13) is formed as a guide surface. The guide surface includes a horizontal section (131) with a height higher than the bottom surface of the guide strip (12) and a sloping section (132) connecting the bottom surface of the guide strip (12) and the horizontal section (131). Guide plate (2), the guide plate (2) is movably arranged in the installation space of the frame (1), and the pulley (21) at the rear end of the guide plate (2) is engaged with the bottom surface of the guide strip (12) and the guide surface of the guide block (13) before the guide plate (2) extends out of the frame (1); A limiting baffle (3) is fixed at the exit of the installation space to limit the guide plate (2) after it extends out of the installation space. A protruding anti-scratch guide wheel (31) is mounted on the limiting baffle (3). The anti-scratch guide wheel (31) is misaligned with the guide block (13). The guide wheel surface of the anti-scratch guide wheel (31) is engaged with the upper plate surface of the guide plate (2).

2. The electric telescopic guide plate device for welfare vehicles according to claim 1, characterized in that, The frame (1) is provided with a drive block (14) that moves linearly within the installation space to drive the guide plate (2) to extend and retract from the frame (1). The guide plate (2) is connected to the drive block (14) via a buckle (22). The first end of the buckle (22) is hinged to the rear end of the guide plate (2), and the pulley (21) is provided at the hinge. The second end of the buckle (22) is hinged to the drive block (14), and a torsion spring (23) is provided at the hinge so that the guide plate (2) can automatically flip and fasten to the limiting baffle (3) after it extends out of the installation space.

3. The electric telescopic guide plate device for welfare vehicles according to claim 2, characterized in that, The frame (1) is also equipped with a drive device (4) for driving the drive block (14), the drive device (4) comprising: A single-sided cylindrical rack (41) is rotatably disposed within the frame (1). The extension direction of the single-sided cylindrical rack (41) is the same as the movement direction of the guide plate (2). One end of the single-sided cylindrical rack (41) is disposed on the limiting baffle (3) to form a switching screwing end (411). A clearance hole (32) is formed on the outer side of the limiting baffle (3). The switching screwing end (411) is disposed in the clearance hole (32) to facilitate being screwed, so as to switch between manual and electric modes. A drive gear (42) is disposed on the first side of the single-sided cylindrical rack (41). In electric mode, the drive gear (42) meshes with the single-sided rack of the single-sided cylindrical rack (41), and the drive motor (421) that drives the drive gear (42) is connected to the drive block (14) and moves with the drive block (14). In manual mode, the single-sided cylindrical rack (41) is rotated, and the drive gear (42) abuts against the arc surface of the single-sided cylindrical rack (41) and disengages from the single-sided rack of the single-sided cylindrical rack (41). The roller (43) is disposed on the second side of the single-sided cylindrical rack (41) and abuts against the arc surface of the single-sided cylindrical rack (41) by an elastic element (45). The roller (43) is connected to the drive block (14) and moves with the drive block (14).

4. The electric telescopic guide plate device for welfare vehicles according to claim 3, characterized in that, A connecting piece (44) is fixed on the drive block (14), and the mounting base (422) of the drive motor (421) is connected to the connecting piece (44). A support rod (431) is arranged on the connecting piece (44). One end of the support rod (431) is hinged to the connecting piece (44), and the roller (43) is arranged on the other end. At the same time, the elastic element (45) is connected to the support rod (431). One end of the elastic element (45) is connected to the support rod (431), and the other end is connected to the mounting base (422) of the drive motor (421). Under the tension of the elastic element (45), the roller (43) on the support rod (431) always abuts against the single-sided cylindrical rack (41).

5. The electric telescopic guide plate device for welfare vehicles according to claim 1, characterized in that, The guide wheel surface of the anti-scratch guide wheel (31) protrudes from the inner side, bottom and outer side of the limiting baffle (3).

6. The electric telescopic guide plate device for welfare vehicles according to claim 1, characterized in that, There are two sets of anti-scratch guide wheels (31), which are evenly distributed in the middle section of the limiting baffle (3).

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