Limiting mechanism for positioning front-back stroke of sliding block
By introducing a positioning roller and a return spring limit mechanism into the mold, the problem of easy loosening of the slider limit mechanism is solved, and precise control and rapid response of the slider are achieved. This makes it suitable for high-speed continuous operation and reduces maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN BAITONG PRECISION MOULD MFG CO LTD
- Filing Date
- 2025-05-06
- Publication Date
- 2026-04-17
AI Technical Summary
The limiting mechanism of the slider in the existing mold is inefficient, prone to loosening, resulting in inaccurate limiting position, high maintenance cost, and difficulty in accurately controlling the forward and backward stroke of the slider.
The limiting mechanism, which includes a main body, positioning roller, positioning pin, return spring and fastening assembly, absorbs the impact force through the cooperation between the slider and the positioning roller and the deformation of the return spring, so as to achieve the adaptive positioning and rapid return of the slider. Combined with the axial runout constraint structure of the fastening assembly, it prevents the slider from jumping during the rebound process.
It improves the accuracy and efficiency of slider stroke control, reduces return response time, is suitable for high-speed continuous operation scenarios, and reduces maintenance costs.
Smart Images
Figure CN224128418U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mold technology, specifically to a limiting mechanism for positioning the forward and backward travel of a slider. Background Technology
[0002] In mold processing, the control of the slider's stroke directly affects the product molding accuracy. Current technologies typically employ fixed limit blocks or threaded adjustment limit mechanisms. However, these mechanisms require repeated manual calibration, are inefficient, and are prone to loosening over time, leading to inaccurate limit positions and high maintenance costs.
[0003] To address the aforementioned issues, an expert in this field has proposed a novel limiting mechanism for positioning the forward and backward travel of a slider. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a limiting mechanism for positioning the forward and backward travel of a slider, which is particularly suitable for injection molds or stamping molds that require precise control of the lateral travel of the slider.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A limiting mechanism for positioning the forward and backward travel of a slider includes a main body, a positioning roller, a positioning pin, a return spring, and a fastening assembly. The main body includes an upper connecting body and a lower connecting body arranged coaxially. The outer diameter of the upper connecting body is larger than the outer diameter of the lower connecting body, and a stepped limiting surface is formed at the axial connection between the two. The positioning roller is rotatably connected to the upper part of the upper connecting body through the positioning pin. The return spring is sleeved on the outer peripheral surface of the lower connecting body, with its top end abutting against the stepped limiting surface and its bottom end abutting against the mold base plate. The fastening assembly fixes the main body to the mold base plate and includes an axial runout constraint structure.
[0007] Furthermore, the top surface of the upper connecting body is provided with an upwardly protruding arc structure, which matches the arc surface of the positioning roller.
[0008] Furthermore, the outer peripheral surface of the upper connecting body is provided with two through holes, and the positioning pin passes through the through holes and extends into the interior of the positioning roller.
[0009] Furthermore, the free length of the return spring is greater than the axial length of the lower connecting body.
[0010] Furthermore, the fastening assembly includes a connecting hole at the bottom of the lower connector and a screw passing through the connecting hole. The head of the screw is larger than the inner diameter of the connecting hole. The lower section of the screw passes through the connecting hole and is threaded to the mold base plate. The head of the screw is hung inside the main body, and the head of the screw and the main body form an axial runout constraint structure.
[0011] Furthermore, it includes a slider used in conjunction with a limiting mechanism, wherein the bottom surface of the slider is provided with at least one semi-circular groove, and the semi-circular groove is adapted to the positioning roller.
[0012] Compared with the prior art, the present invention has the following beneficial effects:
[0013] A limiting mechanism for the forward and backward travel of the positioning slider is provided, including a main body, a positioning roller, a positioning pin, a return spring, and a fastening assembly. When the slider moves laterally, the bottom surface of the slider passes through the positioning roller and applies a downward pressure to the positioning roller, causing the main body to adaptively move downward and compress the return spring. The deformation of the return spring absorbs the impact, preventing the main body from rigidly colliding with the mold base plate during downward movement. When the semi-circular groove on the bottom surface of the slider passes through and engages with the positioning roller, the positioning roller adapts and positions the slider, and the return spring changes from the compressed state to its original state, rebounding and instantly restoring the main body to the starting height, reducing the return response time and making it suitable for high-speed continuous operation scenarios. Furthermore, the axial runout constraint structure of the fastening assembly limits the axial runout of the main body during the rebound process, preventing the main body from colliding with the slider during rebound and causing slider jumps. Attached Figure Description
[0014] Figure 1 The diagram shown is a cross-sectional view of this limiting mechanism.
[0015] Figure 2 The diagram shown is a three-dimensional structural schematic of this limiting mechanism;
[0016] Figure 3 The diagram shown is a schematic representation of the usage state of this limiting mechanism.
[0017] Figure 4 The diagram shown is a schematic diagram of the usage state of this limiting mechanism.
[0018] In the diagram: 1. Main body; 2. Positioning roller; 3. Positioning pin; 4. Return spring; 5. Connecting hole; 6. Screw; 7. Mold base plate; 8. Slider; 11. Upper connecting body; 12. Lower connecting body; 81. Semicircular groove; 111. Arc structure. Detailed Implementation
[0019] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] See Figure 1-4As shown, this utility model provides a technical solution: a limiting mechanism for the forward and backward travel of a positioning slider, comprising a main body 1, a positioning roller 2, a positioning pin 3, a return spring 4, and a fastening assembly; the main body 1 includes an upper connecting body 11 and a lower connecting body 12 coaxially arranged, the outer diameter of the upper connecting body 11 being larger than the outer diameter of the lower connecting body 12, and a stepped limiting surface being formed at the axial connection between the two; the positioning roller 2 is rotatably connected to the upper part of the upper connecting body 11 through the positioning pin 3; the return spring 4 is sleeved on the outer circumferential surface of the lower connecting body 12, its top end abutting against the stepped limiting surface, and its bottom end abutting against the mold base plate; the fastening assembly fixes the main body 1 to the mold base plate, and the fastening assembly includes an axial runout constraint structure. When slider 8 moves laterally, its bottom surface passes through positioning roller 2 and applies downward pressure, causing the main body 1 to adaptively move downward and compress the return spring 4. The deformation of the return spring 4 absorbs the impact, preventing the main body 1 from rigidly colliding with the mold base plate during downward movement. When the semi-circular groove 81 on the bottom surface of slider 8 passes through and engages with positioning roller 2, positioning roller 2 adapts and positions slider 8, and the return spring 4 changes from its compressed state to its original state, rebounding and pushing the main body 1 to instantly return to the starting height, reducing the return response time and making it suitable for high-speed continuous operation scenarios. Furthermore, the axial runout constraint structure of the fastening components restricts the axial runout of the main body 1 during the rebound process, preventing the main body 1 from colliding with slider 8 during the rebound process and causing slider jump or other phenomena.
[0021] See Figure 2 As shown, the top surface of the upper connecting body 11 is provided with an upwardly protruding arc structure 111. The arc structure 111 matches the arc surface of the positioning roller 2. The highest arc surface of the arc structure 111 is slightly lower than the arc surface of the positioning roller 2. By designing the arc structure 111 on the top surface of the upper connecting body 11, the downward pressing force of the bottom surface of the slider 8 on the positioning roller 2 can be shared. When the bottom surface of the slider 8 passes the positioning roller 2 and the arc structure 111, the downward pressing force is transferred to the main body 1 and the positioning roller 2, causing the entire main body 1 to move downward.
[0022] The upper connecting body 11 has two through holes on its outer peripheral surface. The positioning pin 3 passes through the through holes and extends into the positioning roller 2, allowing the positioning roller 2 to rotate.
[0023] See Figure 1 , Figure 3-4 As shown, the free length of the return spring 4 is greater than the axial length of the lower connecting body 12, providing a larger compression stroke and allowing the main body 1 to have a larger range of movement, thereby adapting to different compression depths.
[0024] The fastening assembly includes a connecting hole 5 at the bottom of the lower connecting body 12 and a screw 6 passing through the connecting hole 5. The head of the screw 6 is larger than the inner diameter of the connecting hole 5. The lower part of the screw 6 passes through the connecting hole 5 and is threaded to the mold base plate 7. The head of the screw 6 is hung inside the main body 1. The head of the screw 6 and the interior of the main body 1 form an axial runout constraint structure, which restricts the axial runout of the main body 1 during the springback process and prevents the main body 1 from colliding with the slider 8 during the springback process, causing the slider to jump or other phenomena.
[0025] See Figure 3-4 As shown, it includes a slider 8 used in conjunction with a limiting mechanism. The bottom surface of the slider 8 is provided with at least one semi-circular groove 81, which is adapted to the positioning roller 2.
[0026] Working principle: The slider 8 is driven by an external drive mechanism to move laterally. The bottom surface of the slider 8 passes through the positioning roller 2 and applies downward pressure to the positioning roller 2, causing the main body 1 to move down and compress the return spring 4. The deformation of the return spring 4 absorbs the impact, preventing the main body 1 from rigidly colliding with the mold base plate 7. When the semi-circular groove 81 on the bottom surface of the slider 8 passes through and is engaged with the positioning roller 2, the positioning roller 2 adapts and positions the slider 8. The return spring 4 changes from the compressed state to the original state and rebounds, pushing the main body 1 to instantly return to the starting height, reducing the return response time. This is suitable for high-speed continuous operation scenarios. Furthermore, the screw 6 forms an axial runout constraint structure with the interior of the main body 1, limiting the axial runout of the main body 1 during the rebound process and preventing the main body 1 from colliding with the slider 8 during the rebound process, which would cause the slider 8 to jump.
Claims
1. A limit mechanism for positioning the forward and rearward travel of a slider, characterized by, The device includes a main body (1), a positioning roller (2), a positioning pin (3), a return spring (4), and a fastening assembly. The main body (1) includes an upper connecting body (11) and a lower connecting body (12) arranged coaxially. The outer diameter of the upper connecting body (11) is larger than the outer diameter of the lower connecting body (12), and a stepped limiting surface is formed at the axial connection between the two. The positioning roller (2) is rotatably connected to the upper part of the upper connecting body (11) through the positioning pin (3). The return spring (4) is sleeved on the outer circumferential surface of the lower connecting body (12), with its top end abutting against the stepped limiting surface and its bottom end abutting against the mold base plate. The fastening assembly fixes the main body (1) to the mold base plate, and the fastening assembly includes an axial runout constraint structure.
2. The position-limiting mechanism for positioning the front and rear strokes of the slider according to claim 1, characterized in that, The top surface of the upper connecting body (11) is provided with an upwardly protruding arc structure (111), which matches the arc surface of the positioning roller (2).
3. The position-limiting mechanism for positioning the front and rear strokes of the slider according to claim 1, characterized in that, The upper connecting body (11) has two through holes on its outer peripheral surface, and the positioning pin (3) passes through the through holes and extends into the positioning roller (2).
4. The position-limiting mechanism for positioning the front and rear strokes of the slider according to claim 1, characterized in that, The free length of the return spring (4) is greater than the axial length of the lower connecting body (12).
5. The position-limiting mechanism for positioning the front and rear strokes of the slider according to claim 1, characterized in that, The fastening assembly includes a connecting hole (5) at the bottom of the lower connector (12) and a screw (6) passing through the connecting hole (5). The head of the screw (6) is larger than the inner diameter of the connecting hole (5). The lower part of the screw (6) passes through the connecting hole (5) and is threaded to the mold base plate (7). The head of the screw (6) is hung inside the main body (1). The head of the screw (6) and the interior of the main body (1) form an axial runout constraint structure.
6. The limiting mechanism for positioning the forward and backward travel of the slider according to any one of claims 1 to 5, characterized in that, Includes a slider (8) used in conjunction with a limiting mechanism, wherein the bottom surface of the slider (8) is provided with at least one semi-circular groove (81), and the semi-circular groove (81) is adapted to the positioning roller (2).