Perforating device for automobile sealing strip

Abstract

The utility model provides an automobile sealing strip punching device. The automobile sealing strip punching device comprises a rack, a conveying roller assembly and a punching assembly. In the process that the punch punches the automobile sealing strip, the part, cut by the punch, on the sealing strip possibly enters the inner cavity of the punch, and in the process that the cut part on the sealing strip enters the inner cavity of the punch, the cut part on the sealing strip makes contact with the scraper at the bottom of the inner cavity of the punch and extrudes and moves upwards on the scraper. When the punch is in use, the scraping plate which is extruded upwards drives the spring to be compressed, the compressed spring can generate downward acting force on the scraping plate to promote the scraping plate to move downwards to reset, and the scraping plate which moves downwards applies downward sliding-out acting force on a sealant part remaining in the inner cavity of the punch, so that the sealant part remaining in the inner cavity of the punch falls off from the inner cavity of the punch. The elastic reset acting force of a spring in the discharging mechanism is utilized to automatically promote the sealant remaining in the inner cavity of the punch to partially fall off, and the phenomenon that the use strength and the service life of the punch are affected due to the fact that holes are formed in the punch is avoided.

Description

Technical Field

[0001] This utility model relates to the field of automotive sealing strip technology, specifically to an automotive sealing strip punching device. Background Technology

[0002] Automotive weatherstripping is an important component of vehicles. Some automotive weatherstripping is designed with specific holes to align with the clips and screws on the door or body, ensuring accurate positioning during installation and preventing later displacement that could affect the sealing effect. In addition, some areas of the automotive weatherstripping on the door also require perforations to balance air pressure and facilitate door closure. By perforating the weatherstripping, the holes allow air to escape slowly, reducing air pressure resistance and making the door close more smoothly, while also reducing the risk of the weatherstripping deforming due to frequent pressure.

[0003] In existing technologies, drilling holes in automotive sealing strips is generally done using sealing strip drilling equipment. This equipment uses a punch to press down and cut holes in the sealing strip. However, the portion of the sealing strip cut off during drilling may remain inside the punch, requiring removal of this residual portion. For example, Chinese utility model patent CN210436265U, entitled "A Drilling Device for Automotive Sealing Strips," describes a method where an opening 162 is provided on the side wall of a drill cylinder 161, and a pusher plate 121 is placed inside. After drilling, the drill 16 retracts, and the bottom of the pusher plate 121 abuts against the top of the waste material from the drilling, which falls onto the worktable.

[0004] In this scheme, although the sealing strip residue on the drill cylinder 16 can be removed by setting a fixed pusher plate 121 inside the drill cylinder 161, the drill cylinder 161 needs to have an opening 162 on its side wall. This opening 162 needs to ensure that the sealing strip residue inside the drill cylinder 161 does not interfere with the support arm during the process of drilling holes in the sealing strip when the drill cylinder 161 moves down and then moves up and back up. Therefore, the longitudinal length of the opening 162 needs to be designed to be relatively long. Opening a longitudinally long opening structure on the drill cylinder 161 will have an adverse effect on the strength of the drill cylinder 161 itself and affect the service life of the drill cylinder. Utility Model Content

[0005] In view of the defects existing in the prior art, the purpose of this utility model is to provide an automotive sealing strip punching device to solve the problem that the existing method of making a longitudinal strip-shaped opening on the punch to remove the sealing strip residue in the inner cavity of the punch affects the strength and service life of the punch.

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

[0007] This application provides a device for punching holes in automotive sealing strips, comprising:

[0008] The frame has a conveying groove on its top surface for accommodating automotive sealing strips, and a bottom punch for punching holes in the sealing strips is provided at the bottom of the conveying groove.

[0009] A conveyor roller assembly is installed on opposite sides of the conveyor trough, and the conveyor roller mechanism is used to drive the automotive sealing strip forward;

[0010] A punching assembly includes a mounting plate, a punching cylinder, a punch, and a feeding mechanism. The mounting plate has a through punching hole located directly above the lower punch. The mounting plate is fixedly mounted on a frame. The punching cylinder is mounted above the mounting plate, and its piston rod is connected to the punch. The punch is slidably mounted vertically within the punching hole. The feeding mechanism includes a fixing plate, a connecting rod, a spring, and a scraper. The fixing plate is fixedly mounted above the inner cavity of the punch. The upper end of the connecting rod is vertically slidably mounted on the fixing plate, and the lower end of the connecting rod is fixedly connected to the scraper. The spring is fitted onto the outer circumference of the connecting rod, and the upper end of the spring is fixedly connected to the bottom surface of the fixing plate. The lower end of the spring is fixedly connected to the top surface of the scraper, and the scraper is horizontally slidably mounted at the bottom of the inner cavity of the punch.

[0011] Furthermore, the conveying roller assembly includes a pair of main conveying roller mechanisms and a driven conveying roller mechanism. The pair of main conveying roller mechanisms are respectively disposed at the beginning and end of the conveying trough. The main conveying roller mechanisms are used to drive the automotive sealing strip to move forward. The driven conveying roller mechanism is located between the pair of main conveying roller mechanisms and makes rolling contact with the automotive sealing strip located in the conveying trough.

[0012] Furthermore, the main conveying roller mechanism includes a pair of main drive rollers, a dual-output shaft motor, and a pair of output shafts. The pair of main drive rollers are respectively rotatably mounted on opposite sides of the conveying trough. The main drive rollers are equipped with a vertically downward extending connecting shaft. A first bevel gear is fixedly mounted at the bottom end of the connecting shaft. A second bevel gear is respectively mounted at one end of the pair of output shafts. The first bevel gear meshes with the second bevel gear. The other ends of the pair of output shafts are respectively connected to the dual-output shaft motor.

[0013] Furthermore, it also includes a receiving plate, which is located below the lower punch hole and is arranged obliquely downwards.

[0014] Furthermore, the receiving plate is fixedly installed at the bottom end of the frame.

[0015] Furthermore, a protective cover is provided at the bottom of the frame, and the dual-output shaft motor, a pair of output shafts, a pair of rotating shafts, the first bevel gear and the second bevel gear are installed inside the protective cover.

[0016] The beneficial effects of this utility model are as follows:

[0017] By employing the aforementioned automotive sealing strip punching device, the conveying roller assembly drives the automotive sealing strip forward for transport, while the stamping cylinder drives the punch downward to press and punch the automotive sealing strip within the conveying groove. During the punching process, a portion of the sealing strip cut by the punch may enter the inner cavity of the punch. This cut portion contacts the scraper at the bottom of the inner cavity and pushes it upward. The upward-pressed scraper compresses a spring, which in turn exerts a downward force on the scraper, causing it to move downward and reset. The downward-moving scraper then exerts a downward sliding force on the sealant remaining in the inner cavity of the punch, causing the sealant to detach from the inner cavity. This solution, by arranging a feeding mechanism within the inner cavity of the punch, utilizes the elastic reset force of the spring in the feeding mechanism to automatically detach the sealant remaining in the inner cavity of the punch, avoiding the phenomenon of affecting the punch's strength and service life by drilling holes in the punch. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the automotive sealing strip punching device in the embodiments of this application.

[0019] Figure 2 This is a three-dimensional structural diagram of the automotive sealing strip punching device in this embodiment from another angle.

[0020] Figure 3 This is a schematic diagram of the structure of the automotive sealing strip punching device in this application embodiment punching holes in the sealing strip.

[0021] Figure 4 This is a three-dimensional structural diagram of the punching assembly in the embodiments of this application.

[0022] Figure 5 This is a top view of the punching assembly in an embodiment of this application.

[0023] Figure 6 for Figure 5 A schematic diagram of the AA-direction cross-section structure.

[0024] Figure 7 This is a schematic diagram of the longitudinal cross-sectional structure of the feeding mechanism in the embodiments of this application.

[0025] In the picture:

[0026] 10 - Automotive sealing strip punching device;

[0027] 20 - Automotive sealing strip;

[0028] 100 - Frame, 101 - Conveyor trough, 102 - Lower punch;

[0029] 200-Conveying roller assembly, 201-Main conveying roller mechanism, 2011-Main drive roller, 2012-Connecting shaft, 2013-Dual output shaft motor, 2014-Output shaft, 2015-Second bevel gear, 2016-First bevel gear, 202-Driven conveying roller mechanism;

[0030] 300-Punching assembly, 301-Punching cylinder, 302-Punch, 303-Unloading mechanism, 3031-Fixing plate, 3032-Connecting rod, 3033-Spring, 3034-Scraper, 304-Mounting plate;

[0031] 400-protective shield;

[0032] 500 - Receiving plate. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0034] See appendix Figure 1 To be continued Figure 3 As shown, this embodiment provides an automotive sealing strip punching device 10, including a frame 100, a conveying roller assembly 200, and a punching assembly 300.

[0035] In this embodiment, a conveying groove 101 is provided at the middle position of the top surface of the frame 100. A lower punch 102 for punching the sealing strip is provided at the bottom of the conveying groove 101. The conveying groove 101 is arranged along the length direction of the frame 100 and is used to accommodate the automotive sealing strip 20 to be punched.

[0036] See attached document Figure 1 and attached Figure 3 As shown, in this embodiment, the conveying roller assembly 200 is used to drive the automotive sealing strip 20 forward along the conveying groove 101. In this embodiment, the conveying roller assembly 200 includes a pair of main conveying roller mechanisms 201 and a driven conveying roller mechanism 202. The pair of main conveying roller mechanisms 201 are respectively disposed at the two ends of the conveying groove 101, and are used to drive the automotive sealing strip 20 from one end of the groove to the other end. The driven conveying roller mechanism 202 is disposed between the pair of main conveying roller mechanisms 201, and is used to make rolling contact with the automotive sealing element located in the conveying groove 101.

[0037] By arranging main conveying roller mechanisms 201 at both ends of the conveying trough 101, one main conveying roller mechanism 201 at the feed end of the conveying trough 101 exerts a forward pushing force on the entering automotive sealing strip 20, while the other main conveying roller mechanism 201 at the output end of the conveying trough 101 exerts an outward pulling force on the output automotive sealing strip 20, creating a push-pull effect. This ensures stable entry and exit of the automotive sealing strip 20 during its entry into and exit from the conveying trough 101, improving the smoothness of its movement within the conveying trough 101. Furthermore, a driven conveying roller mechanism 202 is positioned between the pair of main conveying roller mechanisms 201. The driven conveying roller mechanism 202 guides and centers the automotive sealing strip 20 as it moves within the conveying trough 101, preventing it from shifting when moving in the middle of the conveying trough 101.

[0038] See attached document Figure 1 To be continued Figure 3 As shown, in this embodiment, the main conveying roller mechanism 201 includes a pair of main drive rollers 2011, a dual-output shaft motor 2013, and a pair of output shafts 2014. The pair of main drive rollers 2011 are respectively rotatably mounted on the left and right sides of the conveying trough 101, and the main drive rollers 2011 are horizontally mounted on the outer edge of the conveying trough 101. The main drive rollers 2011 are equipped with a vertically downward extending connecting shaft 2012. A first bevel gear 2016 is fixedly mounted at the bottom end of the connecting shaft 2012. A second bevel gear is fixedly mounted at one end of each pair of output shafts 2014. The first bevel gear 2016 meshes with the second bevel gear. The other ends of the pair of output shafts 2014 are respectively connected to the dual-output shaft motor 2013.

[0039] The dual-output shaft motor 2013 drives the output shafts 2014 at both ends to rotate synchronously. The rotating output shafts 2014 then drive the second bevel gear to rotate, which in turn drives the first bevel gear 2016 meshing with it to rotate. The rotating first bevel gear 2016 then drives the connecting shaft 2012 to rotate horizontally, which in turn drives the main drive roller 2011 to rotate horizontally. The rotating main drive roller 2011 then drives the automotive sealing strip 20 to move forward.

[0040] See attached document Figure 1 and attached Figure 2As shown, in some embodiments, a protective cover 400 is provided at the bottom of the frame 100. The dual-output motor 2013, a pair of output shafts 2014, a pair of rotating shafts, a first bevel gear 2016 and a second bevel gear are installed inside the protective cover 400. The protective cover 400 can reduce the impact of external dust or impurities on the dual-output motor, the first bevel gear 2016 and the second bevel gear.

[0041] Continue to refer to the appendix Figure 1 To be continued Figure 3 As shown, in this embodiment, the driven conveying roller mechanism 202 includes multiple driven conveying rollers, which are symmetrically rotated and installed on the left and right sides of the conveying trough 101. Each driven conveying roller is horizontally rotated and installed at one edge of the conveying trough 101 via a provided rotating shaft. When the automotive sealing strip 20 is conveyed forward along the conveying trough 101, the outer side of the automotive sealing strip 20 rolls into contact with the driven conveying rollers.

[0042] See attached document Figure 1 and appendix Figure 3 To be continued Figure 6 As shown, in this embodiment, the punching assembly 300 includes a mounting plate 304, a punching cylinder 301, a punch 302, and a feeding mechanism 303. The mounting plate 304 is horizontally fixedly installed on the upper end face of the mounting groove. A punching hole that runs vertically through the center of the mounting plate 304 is provided. The punching hole is located directly above the lower punch 102. The punching cylinder 301 is fixedly installed above the mounting plate 304. The piston rod of the punching cylinder 301 is connected to the punch 302. The punching cylinder 301 is used to drive the punch 302 to extend and retract. The punch 302 is slidably installed in the punching hole.

[0043] See attached document Figure 6 and attached Figure 7 As shown, in this embodiment, the feeding mechanism 303 includes a fixed plate 3031, a connecting rod 3032, a spring 3033, and a scraper 3034. The fixed plate 3031 is fixedly installed above the inner cavity of the punch 302. The upper end of the connecting rod 3032 is vertically slidably installed on the fixed plate 3031, that is, the upper end of the connecting rod 3032 can pass through the fixed plate 3031 and move vertically upward. The lower end of the connecting rod 3032 is fixedly connected to the scraper 3034. The spring 3033 is fitted on the outer circumferential surface of the connecting rod 3032. The upper end of the spring 3033 is fixedly connected to the bottom end surface of the fixed plate 3031. The lower end of the spring 3033 is fixedly connected to the top end surface of the scraper 3034. The scraper 3034 is horizontally lifted and slidably installed at the bottom end of the inner cavity of the punch 302.

[0044] See attached document Figure 1 To be continued Figure 3As shown, in this embodiment, a receiving plate 500 is provided at the bottom of the frame 100. The receiving plate 500 is located below the lower punch 102 and is fixed to the bottom of the frame 100. The receiving plate 500 is set at an angle downwards. When the punch 302 punches the automotive sealing strip 20, the part of the automotive sealing strip 20 cut by the punch 302 can fall onto the receiving plate 500 through the lower punch 102. Since the receiving plate 500 is set at an angle, the part of the automotive sealing strip 20 that falls onto the receiving plate 500 slides down to the ground by its own weight, making it convenient for workers to clean and collect it later.

[0045] During the punching operation of the automotive sealing strip 20, the punch cylinder 301 drives the punch 302 to move downward, pressing and punching the automotive sealing strip 20 in the conveying groove 101. During the punching process, the automotive sealing strip 20 is in a stopped state (i.e., the dual-axis motor 2013 stops moving). The part cut off by the punch 302 on the automotive sealing strip 20 falls downward through the lower punch hole 102 and enters the receiving plate 500 below. As for the cutting part of the sealing strip that may enter the inner cavity of the punch 302, the part of the automotive sealing strip 20 cut by the punch 302 usually enters the inner cavity of the punch 302. During the process of the cutting part of the sealing strip entering the inner cavity of the punch 302, it will contact the scraper 3034 at the bottom of the inner cavity of the punch 302 and squeeze the scraper 3034 upward. As the pressure moves, the upward-pressed scraper 3034 compresses the spring 3033. The compressed spring 3033 exerts a downward force on the scraper 3034, causing it to move downward and reset. The downward-moving scraper 3034 then exerts a downward sliding force on the sealant residue in the inner cavity of the punch 302, causing the sealant residue to fall out of the inner cavity of the punch 302 and fall through the lower punch hole 102 into the receiving plate 500 below. Subsequently, the punching cylinder 301 rises and resets, and the dual-shaft motor 2013 actuates, driving the automotive sealing strip 20 forward again. When the automotive sealing strip 20 has moved a preset distance (the preset hole spacing of the automotive sealing strip 20), the dual-shaft motor 2013 stops moving, the automotive sealing strip 20 stops moving, and the punching cylinder 301 presses down to punch again, thus repeating the cycle.

[0046] This solution arranges a feeding mechanism 303 in the inner cavity of the punch 302. The elastic restoring force of the spring 3033 in the feeding mechanism 303 is used to automatically cause the sealant remaining in the inner cavity of the punch 302 to fall off, thus avoiding the phenomenon of opening holes in the punch 302 and affecting the strength and service life of the punch 302.

[0047] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. An apparatus for perforating an automobile weather strip, characterized by comprising: include: The frame has a conveying groove on its top surface for accommodating automotive sealing strips, and a bottom punch for punching holes in the sealing strips is provided at the bottom of the conveying groove. A conveyor roller assembly is installed on opposite sides of the conveyor trough, and the conveyor roller mechanism is used to drive the automotive sealing strip forward; A punching assembly includes a mounting plate, a punching cylinder, a punch, and a feeding mechanism. The mounting plate has a through punching hole located directly above the lower punch. The mounting plate is fixedly mounted on a frame. The punching cylinder is mounted above the mounting plate, and its piston rod is connected to the punch. The punch is slidably mounted vertically within the punching hole. The feeding mechanism includes a fixing plate, a connecting rod, a spring, and a scraper. The fixing plate is fixedly mounted above the inner cavity of the punch. The upper end of the connecting rod is vertically slidably mounted on the fixing plate, and the lower end of the connecting rod is fixedly connected to the scraper. The spring is fitted onto the outer circumference of the connecting rod, and the upper end of the spring is fixedly connected to the bottom surface of the fixing plate. The lower end of the spring is fixedly connected to the top surface of the scraper, and the scraper is horizontally slidably mounted at the bottom of the inner cavity of the punch.

2. The apparatus according to claim 1, wherein The conveying roller assembly includes a pair of main conveying roller mechanisms and a driven conveying roller mechanism. The pair of main conveying roller mechanisms are respectively disposed at the beginning and end of the conveying trough. The main conveying roller mechanisms are used to drive the automotive sealing strip to move forward. The driven conveying roller mechanism is located between the pair of main conveying roller mechanisms and makes rolling contact with the automotive sealing strip located in the conveying trough.

3. The automotive sealing strip punching device according to claim 2, characterized in that, The main conveying roller mechanism includes a pair of main drive rollers, a dual-output shaft motor, and a pair of output shafts. The pair of main drive rollers are respectively rotatably mounted on opposite sides of the conveying trough. Each main drive roller is equipped with a vertically downward extending connecting shaft. A first bevel gear is fixedly mounted at the bottom end of the connecting shaft. A second bevel gear is respectively mounted at one end of each pair of output shafts. The first bevel gear meshes with the second bevel gear. The other ends of each pair of output shafts are respectively connected to the dual-output shaft motor.

4. The apparatus according to any one of claims 1 to 3, wherein It also includes a receiving plate, which is located below the lower punch hole and is arranged at an angle downwards.

5. The apparatus according to claim 4, wherein The receiving plate is fixedly installed at the bottom end of the frame.

6. The apparatus according to claim 3, wherein The bottom of the frame is equipped with a protective cover, and the dual-output shaft motor, a pair of output shafts, a pair of rotating shafts, the first bevel gear and the second bevel gear are installed inside the protective cover.

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