A rear floor grinding device

Abstract

This utility model provides a rear floor sanding device, relating to the field of rear floor sanding technology. It includes a frame, with mounting brackets fixedly installed on both sides of the upper surface of the frame. A first clamping block and a second clamping block are fixedly connected to the output ends of the first and second clamping cylinders, respectively. A rear floor body is fixed between the first and second clamping blocks. A sanding mechanism is provided at the bottom of the rear floor body. This application uses an electric push rod to drive an adjusting roller to move left and right, which can be adjusted according to the degree of concavity in the rear section of the rear floor, precisely controlling the sanding depth. Combined with an adjusting motor to adjust the spacing of the adjusting rollers, the tension of the sanding belt can be adjusted. The combination of these two adjustment methods can adapt to the rear ends of rear floors with different thicknesses and sanding requirements. It also allows the two ends of the rear section of the rear floor and the concave surface to be sanded simultaneously, improving sanding efficiency.

Description

Technical Field

[0001] This utility model relates to the field of rear floor sanding technology, and more specifically, to a rear floor sanding device. Background Technology

[0002] In the automotive body structure, the rear floor section is the end component of the rear floor assembly. It forms the rear bottom rear end of the trunk, connects to the lower crossbeam of the rear bulkhead above, and connects to the inner panel of the rear wheel arch and the end of the rear longitudinal beam on the side. It provides space for the spare tire compartment, the fixing point of the vehicle tools, and the rear wiring harness and pipeline laying. In the production process of automotive rear floor, the grinding process of the rear floor section has high precision requirements and directly affects the subsequent assembly quality.

[0003] In the prior art, patent CN113618580B discloses a grinding device and its working method for the front crossbeam of the rear floor front crossbeam assembly. The device includes a grinding chamber with limit mechanisms installed on both side walls. A lifting cylinder is installed on the top of the outer wall of the grinding chamber, with its piston rod end connected to a grinding mechanism. A lifting cylinder is installed on the bottom of the outer wall of the grinding chamber, with its piston rod end connected to a conveying mechanism. Chip extraction mechanisms are installed on both outer walls of the grinding chamber. This invention, through the conveying mechanism, can not only transport the front crossbeam of the rear floor front crossbeam assembly but also load it between two rotating plates, resulting in high loading efficiency. Furthermore, the chip extraction mechanism allows two collection boxes to automatically descend below the front crossbeam after loading, efficiently collecting chips generated during the grinding process.

[0004] However, existing technologies typically only use a grinding wheel for grinding, resulting in a small contact area with the workpiece. When dealing with workpieces that require grinding over a large area, such as the rear section of the back floor with recesses, it is necessary to continuously adjust the position of the grinding wheel or the workpiece, leading to long grinding times and low efficiency. Utility Model Content

[0005] The main objective of this invention is to provide a rear floor grinding device that can effectively solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A rear floor grinding device includes a frame, on both sides of the upper surface of the frame, a mounting bracket is fixedly installed, a first clamping cylinder and a second clamping cylinder are fixedly installed on the mounting brackets on both sides, a first locking block and a second locking block are fixedly connected to the output ends of the first clamping cylinder and the second locking block, a rear floor body is fixed between the first locking block and the second locking block, and a grinding mechanism is provided at the bottom of the rear floor body.

[0008] Preferably, a first abutting block and a second abutting block are fixedly connected to the lower end of the first card block and the upper end of the second card block, respectively, and the first abutting block and the second abutting block abut against both sides of the rear floor body.

[0009] Preferably, a front mounting beam and a rear mounting beam are respectively provided on both sides of the rear floor body, and the first locking block and the second locking block are respectively locked onto the front mounting beam and the rear mounting beam.

[0010] Preferably, the grinding mechanism includes a grinding belt, which is sleeved on two drive rollers and an adjusting roller. One of the drive rollers is rotatably mounted at one end of the base frame, and the bottom of the other drive roller is fixedly mounted at the output end of the grinding motor. The grinding motor is fixedly mounted at the other end of the base frame.

[0011] Preferably, an electric push rod is fixedly installed in the middle of the base frame, and a movable frame is fixedly connected to the output end of the electric push rod.

[0012] Preferably, a guide rod is fixedly connected to one side of the base frame, and the movable frame is slidably sleeved on the guide rod.

[0013] Preferably, a mounting box is fixedly connected to the upper end of the movable frame, an adjusting motor is fixedly installed at one end of the mounting box, a bidirectional lead screw is rotatably installed inside the mounting box, and one end of the bidirectional lead screw is fixedly connected to the output end of the adjusting motor.

[0014] Preferably, both ends of the bidirectional lead screw are threadedly connected to lead screw sleeves, the lead screw sleeves are slidably connected inside the mounting box, and the bottom of the adjusting roller is rotatably mounted on the lead screw sleeves.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) The first clamping cylinder and the second clamping cylinder drive the first abutting block and the second abutting block to approach or move away from each other, thereby achieving clamping and fixing or releasing of the rear floor body. Through the snap-fit ​​structure of the first snap-fit ​​block and the front mounting beam, and the second snap-fit ​​block and the rear mounting beam, a double positioning of snap-fit ​​and abutting is formed, which can accurately position the rear floor body and effectively prevent the rear floor body from shifting due to force during the grinding process.

[0017] (2) The adjustment roller is moved left and right by the electric push rod, which can be adjusted according to the degree of concavity of the rear section of the rear floor, so as to accurately control the grinding depth, adapt to the grinding needs of different specifications of rear floor, and improve the versatility of the device. In conjunction with the adjustment motor, the spacing of the adjustment roller can be adjusted to realize the adjustment of the tension of the grinding belt, so as to avoid the grinding belt running off track or aggravating wear due to uneven tension. The combination of the two adjustment methods makes the device adaptable to rear floor bodies with different thicknesses and different grinding needs, which is highly flexible. It can also make the two ends of the rear section of the rear floor and the concave surface grinded at the same time, which improves the grinding efficiency. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a three-dimensional schematic diagram of a partial structure of this utility model;

[0020] Figure 3 This is a front view schematic diagram of the structure in this utility model;

[0021] Figure 4 This utility model Figure 3 Enlarged view of the structure at point A in the middle;

[0022] Figure 5 This is a three-dimensional schematic diagram of the grinding mechanism in this utility model.

[0023] In the diagram: 1. Frame; 11. Mounting frame; 2. Grinding mechanism; 3. First clamping cylinder; 31. First locking block; 32. First abutting block; 4. Second clamping cylinder; 41. Second locking block; 42. Second abutting block; 5. Rear floor body; 51. Front mounting beam; 52. Rear mounting beam; 21. Grinding belt; 22. Grinding motor; 23. Base frame; 24. Transmission roller; 25. Adjusting roller; 26. Bidirectional lead screw; 27. Lead screw sleeve; 28. Movable frame; 29. ​​Adjusting motor; 210. Guide rod; 211. Electric push rod; 212. Mounting box. Detailed Implementation

[0024] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0025] like Figure 1 , Figure 2As shown in the figure, this utility model embodiment proposes a rear floor grinding device, including a frame 1. Mounting brackets 11 are fixedly installed on both sides of the upper surface of the frame 1. A first clamping cylinder 3 and a second clamping cylinder 4 are fixedly installed on the mounting brackets 11 on both sides respectively. A first locking block 31 and a second locking block 41 are fixedly connected to the output ends of the first clamping cylinder 3 and the second clamping cylinder 4 respectively. A rear floor body 5 is fixed between the first locking block 31 and the second locking block 41. A grinding mechanism 2 is provided at the bottom of the rear floor body 5.

[0026] like Figures 1-3 As shown, a first abutting block 32 and a second abutting block 42 are fixedly connected to one side of the lower end of the first locking block 31 and one side of the upper end of the second locking block 41, respectively. The first abutting block 32 and the second abutting block 42 abut against both sides of the rear floor body 5, and a front mounting beam 51 and a rear mounting beam 52 are respectively provided on both sides of the rear floor body 5. The first locking block 31 and the second locking block 41 are respectively locked onto the front mounting beam 51 and the rear mounting beam 52.

[0027] In this application, the first clamping block 32 and the second clamping block 42 are positioned correspondingly and abut against both sides of the rear floor body 5, respectively. The first clamping cylinder 3 and the second clamping cylinder 4 drive the first clamping block 32 and the second clamping block 42 to move closer or further apart, thereby clamping and fixing or releasing the rear floor body 5. Through the snap-fit ​​structure between the first locking block 31 and the front mounting beam 51, and the second locking block 41 and the rear mounting beam 52, a double positioning of snap-fit ​​and clamping is formed, which can accurately position the rear floor body 5 and effectively prevent the rear floor body 5 from shifting due to force during the sanding process.

[0028] like Figure 1 , Figure 2 , Figure 4 , Figure 5 As shown, the grinding mechanism 2 includes a grinding belt 21, which is sleeved on two transmission rollers 24 and an adjusting roller 25. The bottom of one transmission roller 24 is rotatably mounted on one end of the base frame 23, and the bottom of the other transmission roller 24 is fixedly mounted on the output end of the grinding motor 22. The grinding motor 22 is fixedly mounted on the other end of the base frame 23.

[0029] In this application, two drive rollers 24 are the main support components, located on both sides of the rear section of the rear floor. The length of the grinding belt 21 is greater than the width of the rear section of the rear floor. The two adjusting rollers 25 can be adjusted according to the degree of concavity of the rear section of the rear floor to ensure that the grinding belt 21 is in contact with the concave surface. The multi-roller cooperation not only makes the tension of the grinding belt 21 stable, but also allows the two ends of the rear section of the rear floor and the concave surface to be ground simultaneously, thus improving the grinding efficiency.

[0030] like Figures 2-5As shown, an electric push rod 211 is fixedly installed in the middle of the base frame 23. A movable frame 28 is fixedly connected to the output end of the electric push rod 211. A guide rod 210 is fixedly connected to one side of the base frame 23. The movable frame 28 is slidably sleeved on the guide rod 210. A mounting box 212 is fixedly connected to the upper end of the movable frame 28. An adjusting motor 29 is fixedly installed at one end of the mounting box 212. A bidirectional lead screw 26 is rotatably installed inside the mounting box 212. One end of the bidirectional lead screw 26 is fixedly connected to the output end of the adjusting motor 29. Both ends of the bidirectional lead screw 26 are threadedly connected to lead screw sleeves 27. The lead screw sleeves 27 are slidably connected inside the mounting box 212. The bottom of the adjusting roller 25 is rotatably installed on the lead screw sleeves 27.

[0031] The extension and retraction of the electric push rod 211 can drive the movable frame 28 to slide left and right along the guide rod 210, which in turn drives the adjusting roller 25 to move left and right through the mounting box 212, so as to achieve precise adjustment of the distance between the grinding belt 21 and the groove at the rear end of the rear floor, and accurately control the grinding depth. The adjusting motor 29 drives the bidirectional lead screw 26 to rotate, so that the lead screw sleeves 27 at both ends slide along the mounting box 212 and drive the adjusting roller 25 to move horizontally, thereby adjusting the distance between the two adjusting rollers 25, and adjusting the tension of the grinding belt 21. This avoids the grinding belt 21 from running off-center or aggravating wear due to uneven tension. The combination of the two adjustment methods allows the device to adapt to rear floor body 5 with different thicknesses and different grinding requirements, and has high flexibility.

[0032] The working principle of this type of rear floor grinding device:

[0033] During operation, the first clamping cylinder 3 and the second clamping cylinder 4 drive the first clamping block 31 and the second clamping block 41. The clamping blocks engage with the front mounting beam 51 and the rear mounting beam 52, and the first abutting block 32 and the second abutting block 42 provide lateral abutment, achieving precise positioning and stable clamping of the rear floor body 5. The electric push rod 211 drives the adjusting roller 25 to move left and right, bringing the adjusting roller 25 closer to the recessed part of the rear section of the rear floor. This ensures that the grinding belt 21 is in contact with the surface of the groove in the rear section of the rear floor, and that the grinding belts 21 at both ends are in contact with the two side surfaces of the rear section of the rear floor. The adjusting motor 29 drives the bidirectional lead screw 26 to adjust the spacing of the adjusting roller 25, ensuring that the tension of the grinding belt 21 is appropriate. After adjustment, the grinding motor 22 is started to drive the transmission roller 24 to rotate, which in turn drives the grinding belt 21 to perform the grinding operation, ultimately achieving stable and precise grinding of the rear section of the rear floor.

[0034] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. Any obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.

Claims

1. A rear floor grinding device, comprising a frame (1), characterized in that: Mounting brackets (11) are fixedly installed on both sides of the upper surface of the frame (1). A first clamping cylinder (3) and a second clamping cylinder (4) are fixedly installed on the mounting brackets (11) on both sides respectively. A first clamping block (31) and a second clamping block (41) are fixedly connected to the output ends of the first clamping cylinder (3) and the second clamping cylinder (4) respectively. A rear floor body (5) is fixed between the first clamping block (31) and the second clamping block (41). A grinding mechanism (2) is provided at the bottom of the rear floor body (5).

2. The rear floor grinding device according to claim 1, characterized in that: A first abutting block (32) and a second abutting block (42) are fixedly connected to the lower side of the first card block (31) and the upper side of the second card block (41), respectively. The first abutting block (32) and the second abutting block (42) abut against both sides of the rear floor body (5).

3. The rear floor grinding device according to claim 2, characterized in that: The rear floor body (5) is provided with a front mounting beam (51) and a rear mounting beam (52) on both sides, and the first locking block (31) and the second locking block (41) are respectively locked onto the front mounting beam (51) and the rear mounting beam (52).

4. The rear floor grinding device according to claim 1, characterized in that: The grinding mechanism (2) includes a grinding belt (21), which is sleeved on two transmission rollers (24) and an adjusting roller (25). One of the transmission rollers (24) is rotatably mounted on one end of the base frame (23), and the other transmission roller (24) is fixedly mounted on the output end of the grinding motor (22). The grinding motor (22) is fixedly mounted on the other end of the base frame (23).

5. The rear floor grinding device according to claim 4, characterized in that: An electric push rod (211) is fixedly installed in the middle of the base frame (23), and a movable frame (28) is fixedly connected to the output end of the electric push rod (211).

6. The rear floor grinding device according to claim 5, characterized in that: A guide rod (210) is fixedly connected to one side of the base frame (23), and the movable frame (28) is slidably sleeved on the guide rod (210).

7. A rear floor grinding device according to claim 5, characterized in that: The upper end of the movable frame (28) is fixedly connected to the mounting box (212), and one end of the mounting box (212) is fixedly installed with an adjusting motor (29). A bidirectional lead screw (26) is rotatably installed inside the mounting box (212), and one end of the bidirectional lead screw (26) is fixedly connected to the output end of the adjusting motor (29).

8. The rear floor grinding device according to claim 7, characterized in that: Both ends of the bidirectional lead screw (26) are threadedly connected to lead screw sleeves (27), which are slidably connected inside the mounting box (212). The bottom of the adjusting roller (25) is rotatably mounted on the lead screw sleeve (27).

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