Positioning clamp for assembling a toaster box
Patent Information
- Application Number
- CN202521950584.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-10
- Publication Date
- 2026-09-29
- Estimated Expiration
- 2035-09-10
AI Technical Summary
[0003]然而，上述装置大多依赖刚性面接触+滑移来完成“靠边—夹紧”的全过程：操作者或上料机构将吐司盒推入工位后，吐司盒的侧壁会沿挡块或斜面发生相对滑动再被压紧
[0016]通过“滚轮定位+对角压靠”的组合，避免传统刚性挡块靠擦定位带来的划伤与碰伤。第一定位组件承担几何基准，第二定位组件位于第三侧边与第四侧边的对角处，两只第二定位轮在气缸作用下沿对角线合力将吐司盒自动推抵至相邻两侧的第一定位轮，实现无需预先精准对位的自寻位夹紧；两侧“1+2”多点限位抑制平面内平移，夹紧力与定位基准解耦，重复定位精度与外观良率显著提升，特别适用于带防粘涂层或阳极氧化层的薄壁吐司盒。
Smart Images
Figure CN224809305U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of clamps, and in particular to a positioning clamp for assembling a toast box. Background Technology
[0002] In the baking industry, loaf pans (also known as loaf molds or loaf trays) are mostly thin-walled metal parts with a non-stick coating or anodized layer on the outer surface, requiring high standards for appearance and surface integrity. During assembly, square loaf pans need to be quickly positioned and clamped at the workstation for subsequent riveting, pressing, or inspection. Existing production lines commonly use rigid stops combined with cylinder clamping blocks, four-jaw clamping mechanisms, or V-shaped / inclined guide blocks for positioning and clamping.
[0003] However, most of the aforementioned devices rely on rigid surface contact and sliding to complete the entire "edge-clamping" process: after the operator or feeding mechanism pushes the toast box into the workstation, the side wall of the toast box will slide relative to the stop or inclined surface and then be clamped. Because the toast box has thin walls, folded edges, and a relatively soft surface coating, this sliding friction is very likely to cause scratches, bumps, indentations, or paint peeling at the corners; if there is a height difference between the stop and the edge of the toast box, local stress concentration will also be formed at the moment of clamping, causing deformation and scrapping, affecting the yield rate.
[0004] On the other hand, many clamps are coupled with the positioning reference and lack self-aligning capability: the four rigid stops are fixed or "squeezed in" for positioning by the inclined plane. If the dimensional tolerance of the toast box and the feeding posture are slightly off, interference will occur with the stops. To avoid jamming and scratches, the operator often needs to perform relatively precise manual alignment first (making the two adjacent sides basically parallel and close to the reference plane) before starting the clamping action; this not only increases the cycle time, but also requires high feeding accuracy in automated feeding scenarios and has poor adaptability to model changes.
[0005] In summary, existing fixtures generally suffer from problems such as easily damaging or scratching the toast box, requiring precise pre-alignment before clamping, and being insensitive to dimensional deviations and orientation errors, making it difficult to balance efficiency and yield. Therefore, it is necessary to provide a positioning fixture that can reliably position two adjacent sides of a square toast box without damaging its surface, and has adaptive guiding capabilities during clamping. Utility Model Content
[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a positioning fixture for assembling a toast box.
[0007] To achieve the above objectives, the following solution is adopted:
[0008] A positioning fixture for assembling a toast box includes:
[0009] At least three first positioning components, each first positioning component including a first support and a first positioning wheel rotatably disposed on the first support, the at least three first positioning components are mounted on the same plane, at least one first positioning component positions a first side of a square loaf box, and at least two first positioning components position a second side of the loaf box, the first side and the second side being adjacent to each other.
[0010] The second positioning component includes a base, a cylinder mounted on the base, and a second support connected to the drive end of the cylinder. The second support is provided with two rotatable second positioning wheels. The second positioning component is located at the diagonal of the third and fourth sides of the toast box. The second positioning wheels are pressed against the third and fourth sides under the drive of the cylinder, so as to force the first and second sides to press against the corresponding first positioning wheels. The third and fourth sides are adjacent to each other.
[0011] Furthermore, the base is also provided with a connecting plate and two sets of guide components. The driving end of the cylinder is connected to the connecting plate, the connecting plate is connected to the second support, and the guide components include mounting seats located on both sides of the connecting plate and a first guide post whose two ends are connected to the two mounting seats and pass through the connecting plate.
[0012] Furthermore, the connecting plate hinge is rotatably connected to the second support.
[0013] Furthermore, the hinge member has second guide posts on both sides. One end of the second guide post is connected to the second support, and the other end passes through the groove in the connecting plate. A spring is fitted on the second guide post. To accommodate dimensional and posture deviations, the second support is rotatably engaged with the connecting plate via the hinge member. The connecting plate has first guide posts on both sides to provide linear guidance. The second guide posts pass through the groove and are equipped with springs to form an elastic stroke, achieving buffering and clearance during the fitting process, avoiding local stress concentration and jamming.
[0014] Furthermore, the first positioning wheel and the second positioning wheel have rubber surfaces.
[0015] By adopting the above solution, the beneficial effects of this utility model are:
[0016] By combining "roller positioning + diagonal pressing," the scratches and dents caused by traditional rigid block rubbing positioning are avoided. The first positioning component serves as the geometric reference, and the second positioning component is located diagonally between the third and fourth sides. Under the action of the cylinder, the two second positioning wheels work together along the diagonal to automatically push the toast box to the first positioning wheels on the adjacent sides, achieving self-aligning clamping without the need for precise pre-alignment. The "1+2" multi-point limiting on both sides inhibits in-plane translation, decoupling the clamping force from the positioning reference, significantly improving repeatability and appearance yield. It is particularly suitable for thin-walled toast boxes with anti-stick coatings or anodized layers.
[0017] The entire fixture has a compact structure, a moderate number of parts, and easily replaceable rollers, which reduces the requirements for feeding accuracy, shortens the clamping cycle, and improves the stability and ease of maintenance during long-term operation. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the positioning fixture for assembling a toast box according to this utility model.
[0019] The following are explanations of the labels in the attached diagram:
[0020] 1. First positioning component; 11. First support; 12. First positioning wheel; 2. Second positioning component; 21. Base; 22. Cylinder; 23. Second support; 24. Second positioning wheel; 25. Connecting plate; 261. Mounting seat; 262. First guide post; 27. Hinge; 28. Second guide post; 29. Spring; 31. First side; 32. Second side; 33. Third side; 34. Fourth side. Detailed Implementation
[0021] 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.
[0022] Reference Figure 1 As shown, this utility model provides a positioning fixture for assembling a toast box, comprising:
[0023] At least three first positioning components 1, each first positioning component 1 including a first support 11 and a first positioning wheel 12 rotatably disposed on the first support 11, the at least three first positioning components 1 are mounted on the same plane, at least one first positioning component 1 positions the first side 31 of the square toast box, and at least two first positioning components 1 position the second side 32 of the toast box, the first side 31 and the second side 32 are adjacent to each other;
[0024] The second positioning component 2 includes a base 21, a cylinder 22 mounted on the base 21, and a second support 23 connected to the drive end of the cylinder 22. The second support 23 is provided with two rotatable second positioning wheels 24. The second positioning component 2 is located at the diagonal of the third side 33 and the fourth side 34 of the toast box. The second positioning wheels 24 are pressed against the third side 33 and the fourth side 34 under the drive of the cylinder 22, so as to force the first side 31 and the second side 32 to press against the corresponding first positioning wheel 12. The third side 33 and the fourth side 34 are adjacent.
[0025] The base 21 is also equipped with a connecting plate 25 and two sets of guide components. The drive end of the cylinder 22 is connected to the connecting plate 25, and the connecting plate 25 is connected to the second support 23. The guide components include mounting seats 261 located on both sides of the connecting plate 25, and first guide posts whose two ends are connected to the two mounting seats 261 and pass through the connecting plate 25. The connecting plate 25 is rotatably connected to the second support 23 via a hinge 27. Second guide posts are provided on both sides of the hinge 27. One end of the second guide post is connected to the second support 23, and the other end passes through the waist groove of the connecting plate 25. A spring 29 is fitted on the second guide post. To accommodate size and posture deviations, the second support 23 is rotatably engaged with the connecting plate 25 via the hinge 27. The first guide posts on both sides of the connecting plate 25 provide linear guidance, and the second guide posts pass through the waist groove and are equipped with springs 29 to form an elastic stroke, thereby achieving buffering and clearance during the fitting process and avoiding local stress concentration and jamming.
[0026] The first positioning wheel 12 and the second positioning wheel 24 have rubber surfaces. Based on the rubber surfaces, a cushioning effect is formed to prevent damage to the toast box.
[0027] Additionally, it is worth noting that, in order to demonstrate the second guide post 28, Figure 1 The spring 29 in the design has been removed so that it does not obstruct the second guide post 28. In practical applications, the spring 29 should contact the connecting plate 25 and the second support 23 respectively, and provide cushioning force by expanding or contracting.
[0028] Working principle:
[0029] The second positioning component 2 and at least three first positioning components 1 can be mounted on any plane, such as a tool table or production line. This fixture uses a fixed reference roller + diagonal pressing roller force path. At least three first positioning components 1 (1 point on the first side 311 and 322 on the second side 322) establish a 1+2 multi-point geometric reference in the same plane, limiting the translation of the square toast box within the plane. The second positioning component 2 is arranged at the corner of the third and fourth sides 34. The cylinder 22 pushes the second support 23, which carries two second positioning wheels 24, to move linearly along the guide direction. The two second positioning wheels 24 apply a diagonal resultant force to the third and fourth sides 34, automatically pushing the toast box against the first positioning wheels 12 on the first side 31 and the second side 32 during rolling contact, achieving self-aligning and fitting. The hinge 27, the second guide post, and the spring 29 provide smooth clearance and cushioning, avoiding over-constraint and impact, and reducing the risk of scratching thin-walled / coated surfaces.
[0030] Beneficial effects:
[0031] By combining "roller positioning + diagonal pressing", scratches and bumps caused by traditional rigid block rubbing positioning are avoided. The first positioning component 1 serves as the geometric reference, and the second positioning component 2 is located at the diagonal of the third side 33 and the fourth side 34. Under the action of the cylinder 22, the two second positioning wheels 24 exert a combined force along the diagonal to automatically push the toast box to the first positioning wheels 12 on the adjacent sides, realizing self-positioning clamping without the need for precise pre-alignment. The "1+2" multi-point limiting on both sides inhibits in-plane translation, decouples the clamping force from the positioning reference, and significantly improves the repeatability and appearance yield. It is especially suitable for thin-walled toast boxes with anti-stick coatings or anodized layers.
[0032] The entire fixture has a compact structure, a moderate number of parts, and easily replaceable rollers, which reduces the requirements for feeding accuracy, shortens the clamping cycle, and improves the stability and ease of maintenance during long-term operation.
[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A positioning fixture for assembling a toast box, characterized in that, include: At least three first positioning components, each first positioning component including a first support and a first positioning wheel rotatably disposed on the first support, the at least three first positioning components are mounted on the same plane, at least one first positioning component positions a first side of a square loaf box, and at least two first positioning components position a second side of the loaf box, the first side and the second side being adjacent to each other. The second positioning component includes a base, a cylinder mounted on the base, and a second support connected to the drive end of the cylinder. The second support is provided with two rotatable second positioning wheels. The second positioning component is located at the diagonal of the third and fourth sides of the toast box. The second positioning wheels are pressed against the third and fourth sides under the drive of the cylinder, so as to force the first and second sides to press against the corresponding first positioning wheels. The third and fourth sides are adjacent to each other.
2. The positioning fixture for assembling a toast box according to claim 1, characterized in that, The base is also provided with a connecting plate and two sets of guide components. The driving end of the cylinder is connected to the connecting plate, and the connecting plate is connected to the second support. The guide components include mounting seats located on both sides of the connecting plate and a first guide post whose two ends are connected to the two mounting seats and pass through the connecting plate.
3. The positioning fixture for assembling a toast box according to claim 2, characterized in that, The connecting plate hinge is rotatably connected to the second support.
4. The positioning fixture for assembling a toast box according to claim 3, characterized in that, The hinge has second guide posts on both sides. One end of the second guide post is connected to the second support, and the other end passes through the waist groove of the connecting plate. A spring is sleeved on the second guide post.
5. The positioning fixture for assembling a toast box according to claim 1, characterized in that, The first positioning wheel and the second positioning wheel have rubber surfaces.