A demoulding device for the production of a reverse gear
By designing a demolding device for the pushing mechanism and the forming mechanism, and using a motor to drive the gear to rotate the sleeve, the problem of workpiece adhesion in the production of motorcycle reverse gears was solved, and an efficient demolding process was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING HONGZHISHUN MACHINERY MANUFACTURING CO LTD
- Filing Date
- 2025-05-29
- Publication Date
- 2026-05-29
AI Technical Summary
During the production of motorcycle reverse gears, the workpiece is prone to sticking to the inside of the lower mold base, affecting demolding efficiency.
A demolding device including a pushing mechanism and a forming mechanism was designed. The device uses a motor to drive the gear to rotate the gear ring and the sleeve, and pushes the workpiece out through the lead screw push plate. The stability is improved by combining the limit rod and the retaining ring.
This achieves efficient demolding of workpieces, reduces the time and effort required for manual hammering, and improves production efficiency.
Smart Images

Figure CN224296692U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motorcycle reverse gear manufacturing technology, and in particular to a demolding device for reverse gear manufacturing. Background Technology
[0002] Motorcycles are two- or three-wheeled vehicles powered by gasoline engines and steered by handlebars. They are lightweight, agile, and fast, widely used for patrolling, passenger and freight transport, and also as sports equipment. Broadly speaking, motorcycles are categorized into street bikes, road racing motorcycles, off-road motorcycles, cruisers, and touring motorcycles. In the production of motorcycle reverse gears, the housing is typically produced using molding. However, existing molds for motorcycle reverse gears are difficult to demold, requiring manual hammering by workers, which is time-consuming and labor-intensive.
[0003] In the prior art, patent document with publication number (CN214821212U) mentions a quick demolding device for producing motorcycle reverse gears, including an operating plate, an upper mold base, a lower mold base, and a mold frame. The lower mold base is embedded in the center of the top of the operating plate, and the lower mold base is movably sleeved with the mold frame. A bracket is fixedly mounted in the center of the top of the operating plate, and a hydraulic telescopic rod is fixedly mounted in the center of the top plate of the bracket facing the operating plate. The telescopic end of the hydraulic telescopic rod is fixedly connected to the upper mold base. The top of the lower mold base has mounting grooves corresponding to the positions of two auxiliary plates. Several vertically opposite fixed sleeves are fixedly connected inside the mounting grooves. The fixed sleeves are movably sleeved with a moving rod, and the end of the moving rod away from the fixed sleeve is fixedly connected to the bottom end of the auxiliary plate. This prior art has a reasonable structure and effectively improves the shortcomings of existing technologies, which is conducive to its widespread use.
[0004] In existing technology, the lower mold base is moved to detach from the workpiece, but the workpiece is prone to sticking to the inside of the lower mold base, affecting the demolding efficiency. Utility Model Content
[0005] The purpose of this invention is to provide a demolding device for the production of reverse gears, which solves the problem that workpieces are easily stuck inside the lower mold base, affecting demolding efficiency.
[0006] To achieve the above objectives, this utility model provides a demolding device for producing a reverse gear, including a base plate, a forming mechanism, and a pushing mechanism. The base plate has a groove on its surface. The forming mechanism is disposed on the surface of the base plate, and the pushing mechanism is disposed inside the forming mechanism. The pushing mechanism includes a pushing plate, a lead screw, a sleeve, a gear ring, and a gear. The pushing plate is slidably connected to the base plate and located inside the groove. One end of the lead screw is fixedly connected to the pushing plate, and the other end of the lead screw passes through the base plate. The sleeve is threadedly connected to the lead screw and covers its surface. The gear ring is fixedly connected to the sleeve and located outside the sleeve. The gear is disposed on one side of the gear ring and meshes with the gear ring.
[0007] The pushing mechanism further includes a retaining ring, one end of which is fixedly connected to the sleeve, and the other end of which is rotatably connected to the base plate and located inside the base plate. The cross-section of the retaining ring is L-shaped.
[0008] The pushing mechanism further includes two limiting rods. One end of the two limiting rods is fixedly connected to the pushing plate, and the other end of the two limiting rods passes through the base plate and is respectively disposed on both sides of the limiting rods.
[0009] The forming mechanism includes a lower mold, an upper mold, a fixed frame, and a movable plate. The lower mold is fixedly connected to the base plate and is located above the base plate. The fixed frame is fixedly connected to the base plate and is located above the lower mold. The movable plate is located below the fixed frame. The upper mold is fixedly connected to the movable plate and is located below the movable plate.
[0010] The forming mechanism further includes two round rods and two connecting rods. The two round rods are fixedly connected to the fixed frame and are respectively disposed on both sides of the fixed frame. One end of the two connecting rods is fixedly connected to the movable plate, and the other end of the two connecting rods is respectively sleeved on the surface of the corresponding round rod and is respectively disposed on both sides of the movable plate.
[0011] This utility model discloses a demolding device for producing a reverse gear. A push plate is slidably connected to a base plate and located inside a groove. One end of a lead screw is fixedly connected to the push plate, and the other end of the lead screw passes through the base plate. A sleeve is threadedly connected to the lead screw and covers its surface. A gear ring is fixedly connected to the sleeve and located outside the sleeve. A gear is disposed on one side of the gear ring and meshes with it. A motor is disposed below the base plate, and the output end of the motor is fixedly connected to the gear. After the molding mechanism completes the shaping, the motor drives the gear to rotate, which in turn drives the gear ring to rotate, causing the sleeve to rotate accordingly. The sleeve then drives the lead screw to rotate accordingly. Under the push of the lead screw, the push plate ejects the casting. Attached Figure Description
[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0013] Figure 1 This is a schematic diagram of the demolding device used in the production of the reverse gear of this utility model.
[0014] Figure 2 This is a front view of the demolding device used in the production of the reverse gear of this utility model.
[0015] Figure 3 This is the utility model Figure 2 A sectional view along line AA.
[0016] Figure 4 This is the utility model Figure 3 A schematic diagram of the structure at point B.
[0017] 1-Base plate, 2-Push plate, 3-Screw, 4-Sleeve, 5-Gear ring, 6-Snap ring, 7-Limit rod, 8-Gear, 9-Lower mold, 10-Upper mold, 11-Fixed frame, 12-Moving plate, 13-Round rod, 14-Connecting rod, 15-Groove, 16-Motor, 17-Cylinder. Detailed Implementation
[0018] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.
[0019] Please see Figures 1-4 ,in, Figure 1 This is a schematic diagram of the demolding device used in the production of the reverse gear of this utility model. Figure 2 This is a front view of the demolding device used in the production of the reverse gear of this utility model. Figure 3 This is the utility model Figure 2 AA-line sectional view, Figure 4 This is the utility model Figure 3 A schematic diagram of the structure at point B.
[0020] This utility model provides a demolding device for producing reverse gears, including a base plate 1, a forming mechanism and a pushing mechanism. The pushing mechanism includes a pushing plate 2, a lead screw 3, a sleeve 4, a gear ring 5, a retaining ring 6, two limiting rods 7 and a gear 8. The forming mechanism includes a lower mold 9, an upper mold 10, a fixed frame 11, a moving plate 12, two round rods 13 and two connecting rods 14. The aforementioned solution solves the problem that the workpiece is easily stuck inside the lower mold base, affecting the demolding efficiency.
[0021] In this specific embodiment, a groove 15 is provided on the surface of the base plate 1. The forming mechanism is disposed on the surface of the base plate 1, and the pushing mechanism is disposed inside the forming mechanism. The pushing plate 2 is slidably connected to the base plate 1 and is located inside the groove 15. One end of the lead screw 3 is fixedly connected to the pushing plate 2, and the other end of the lead screw 3 passes through the base plate 1. The sleeve 4 is threadedly connected to the lead screw 3 and covers the surface of the lead screw 3. The gear ring 5 is fixedly connected to the sleeve 4 and is located outside the sleeve 4. The gear 8 is disposed on one side of the gear ring 5 and meshes with the gear ring 5. A motor 16 is disposed below the base plate 1, and the output end of the motor 16 is fixedly connected to the gear 8. After the forming mechanism completes the shaping, the motor 16 drives the gear 8 to rotate, and the gear 8 drives the gear ring 5 to rotate, causing the sleeve 4 to rotate accordingly. The sleeve 4 drives the lead screw 3 to rotate accordingly. Under the push of the lead screw 3, the pushing plate 2 pushes the casting out.
[0022] One end of the retaining ring 6 is fixedly connected to the sleeve 4, and the other end of the retaining ring 6 is rotatably connected to the base plate 1 and located inside the base plate 1. The cross-section of the retaining ring 6 is L-shaped. The retaining ring 6 fixes the sleeve 4 below the base plate 1, thereby improving the stability of the sleeve 4.
[0023] Secondly, one end of each of the two limiting rods 7 is fixedly connected to the push plate 2, and the other end of each of the two limiting rods 7 passes through the base plate 1 and is respectively set on both sides of the limiting rod 7. The limiting rods 7 restrict the position of the push plate 2, thereby improving the stability of the push plate 2.
[0024] Secondly, the lower mold 9 is fixedly connected to the base plate 1 and located above the base plate 1. The fixing frame 11 is fixedly connected to the base plate 1 and located above the lower mold 9. The moving plate 12 is located below the fixing frame 11. The upper mold 10 is fixedly connected to the moving plate 12 and located below the moving plate 12. A cylinder 17 is provided above the fixing frame 11. The output end of the cylinder 17 is fixedly connected to the moving plate 12. The cylinder 17 pushes the moving plate 12, so that the upper mold 10 presses against the surface of the lower mold 9 to complete the shaping.
[0025] In addition, the two round rods 13 are fixedly connected to the fixed frame 11 and are respectively disposed on both sides of the fixed frame 11. One end of the two connecting rods 14 is fixedly connected to the moving plate 12, and the other end of the two connecting rods 14 is respectively sleeved on the surface of the corresponding round rod 13 and is respectively disposed on both sides of the moving plate 12. When the moving plate 12 moves, the connecting rods 14 move accordingly on the surface of the round rods 13, thereby improving the stability of the moving plate 12.
[0026] When using this utility model, the cylinder 17 pushes the moving plate 12, so that the upper mold 10 presses on the surface of the lower mold 9 to complete the shaping. The motor 16 drives the gear 8 to rotate, the gear 8 drives the gear ring 5 to rotate, so that the sleeve 4 rotates accordingly. The sleeve 4 drives the lead screw 3 to rotate accordingly. Under the push of the lead screw 3, the push plate 2 pushes the casting out.
[0027] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.
Claims
1. A demolding device for producing a reverse gear, comprising a base plate, characterized in that, It also includes a forming mechanism and a pushing mechanism. The surface of the base plate is provided with a groove. The forming mechanism is disposed on the surface of the base plate, and the pushing mechanism is disposed inside the forming mechanism. The pushing mechanism includes a pushing plate, a lead screw, a sleeve, a gear ring, and a gear. The pushing plate is slidably connected to the base plate and located inside the groove. One end of the lead screw is fixedly connected to the pushing plate, and the other end of the lead screw passes through the base plate. The sleeve is threadedly connected to the lead screw and covers the surface of the lead screw. The gear ring is fixedly connected to the sleeve and located outside the sleeve. The gear is disposed on one side of the gear ring and meshes with the gear ring.
2. The demolding device for producing a reverse gear as described in claim 1, characterized in that, The pushing mechanism also includes a retaining ring, one end of which is fixedly connected to the sleeve, and the other end of which is rotatably connected to the base plate and located inside the base plate, and the cross-section of the retaining ring is L-shaped.
3. The demolding device for producing a reverse gear as described in claim 2, characterized in that, The pushing mechanism also includes two limiting rods. One end of the two limiting rods is fixedly connected to the pushing plate, and the other end of the two limiting rods passes through the base plate and is respectively disposed on both sides of the limiting rods.
4. The demolding device for producing a reverse gear as described in claim 3, characterized in that, The forming mechanism includes a lower mold, an upper mold, a fixed frame, and a movable plate. The lower mold is fixedly connected to the base plate and is located above the base plate. The fixed frame is fixedly connected to the base plate and is located above the lower mold. The movable plate is located below the fixed frame. The upper mold is fixedly connected to the movable plate and is located below the movable plate.
5. The demolding device for producing a reverse gear as described in claim 4, characterized in that, The forming mechanism further includes two round rods and two connecting rods. The two round rods are fixedly connected to the fixed frame and are respectively disposed on both sides of the fixed frame. One end of the two connecting rods is fixedly connected to the movable plate, and the other end of the two connecting rods is respectively sleeved on the surface of the corresponding round rod and is respectively disposed on both sides of the movable plate.