Lifting clamp

Abstract

The utility model discloses a hoisting clamp, which comprises a retaining component, a lifting component, a lifting component and a lifting component, wherein the retaining component is configured into a transversely extending strip-shaped structure; the number of the clamping parts is two, the two clamping parts are oppositely arranged, and the upper portions of the two clamping parts are in sliding fit with the maintaining part so that the two clamping parts can get close to each other or get away from each other; the connecting rod mechanism comprises two first connecting rods and two second connecting rods, the middle parts of the two first connecting rods are pivoted and configured to be in a crossed state, the lower ends of the two first connecting rods are respectively pivoted with the upper ends of the two clamping parts, the lower ends of the two second connecting rods are respectively pivoted with the upper ends of the two first connecting rods, and the lower ends of the two second connecting rods are respectively pivoted with the upper ends of the two first connecting rods; the upper ends of the two second connecting rods are pivoted with each other, and the lower end of a lifting rope is connected to the pivoted part of the upper ends of the two second connecting rods.

Description

Technical Field

[0001] This utility model relates to the field of non-standard equipment design technology, and in particular to a hoisting clamp. Background Technology

[0002] During hoisting, a hoisting clamp (or lifting device) is usually installed at the lower end of the hoisting rope. In the prior art, there is a lifting device that includes two clamping components arranged opposite each other. The two clamping components are jointly mounted on a retaining component and slide in cooperation with the retaining component. The retaining component is also equipped with a driving component, which can be an electric driving component (e.g., an electrostrictive cylinder) or a pneumatic (or hydraulic, such as a cylinder). The driving component is used to drive the two clamping components to move closer to each other or further away from each other, so that the two clamping components move closer to each other to clamp the workpiece and move further away from each other to release the workpiece.

[0003] The aforementioned lifting devices in the prior art have the following drawbacks:

[0004] 1. Lifting devices equipped with drive components are not cheap.

[0005] 2. When using a drive unit to drive two clamping components to hold a workpiece, a pressure sensor is also required to control the drive unit to stop driving the clamping components after the workpiece is clamped. Furthermore, even with a pressure sensor, the hysteresis in the drive unit's control of the clamping components can still easily lead to excessive clamping force or impact on the workpiece. Utility Model Content

[0006] In view of the above-mentioned problems existing in the prior art, the purpose of this utility model is to provide a lifting clamp to solve the problems in the prior art.

[0007] To achieve the above objectives, the present invention adopts the following solution.

[0008] A hoisting clamp, comprising:

[0009] The retaining component is configured as a laterally extending strip structure;

[0010] The clamping component includes two clamping components arranged opposite to each other, and the upper part of each clamping component is slidably engaged with the holding component so that the two clamping components can move closer to each other or further away from each other;

[0011] The linkage mechanism includes two first links and two second links. The two first links are pivotally connected at the middle and arranged in a crossed state. The lower ends of the two first links are respectively pivotally connected to the upper ends of the two clamping components. The lower ends of the two second links are respectively pivotally connected to the upper ends of the two first links. The upper ends of the two second links are pivotally connected to each other. The lower end of the suspension rope is connected to the pivot point of the upper ends of the two second links.

[0012] Preferably, the distance between the upper ends of the first connecting rods is greater than the distance between the lower ends of the first connecting rods.

[0013] Preferably, the first connecting rod includes an upper rod segment and a lower rod segment integrally fixedly connected, and the two first connecting rods are pivotally connected at the junction area of ​​the upper rod segment and the lower rod segment; wherein:

[0014] The length of the upper pole segment is greater than the length of the lower pole segment, and the included angle between the upper pole segment and the lower pole segment is less than a straight angle.

[0015] Preferably, the second link is provided with a pin, and the clamping component is provided with a pivotable hook. By hooking the hook onto the pin, the two first links drive the two clamping components to remain in a state of being far apart from each other.

[0016] Preferably, the lower part of both clamping components is provided with an inwardly protruding anti-detachment component.

[0017] Preferably, the clamping component is configured as a plate frame structure; the anti-detachment component includes columns, and at least two columns are installed on the inner side of the lower part of each clamping component.

[0018] Preferably, the retaining component is provided with a laterally extending slide rail, and the clamping component is equipped with a slider that cooperates with the slide rail.

[0019] Preferably, a mounting plate is fixed to the top of the clamping component, and a hollow portion is provided on the clamping component below the mounting plate. The slider is fixed to the bottom of the mounting plate, and the clamping component passes through the hollow portion.

[0020] Preferably, a set screw with a handle at its outer end is provided through the side of each of the clamping components, and the clamping component is restricted from sliding relative to the retaining component by abutting the inner end of the set screw against the retaining component.

[0021] Compared with the prior art, the lifting clamp provided by this utility model has the following advantages:

[0022] The fixture provided by this utility model uses a linkage mechanism to convert the weight of the workpiece and the clamping components into a force that brings the two clamping components closer together, thereby achieving stable lifting of the workpiece and avoiding the need to use the driving component to apply force to keep the two clamping components close together.

[0023] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit the present invention.

[0024] The overview of various implementations or examples of the technology described in this utility model is not a complete disclosure of the full scope or all features of the disclosed technology. Attached Figure Description

[0025] In drawings that are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The same reference numerals with or without letter suffixes may indicate different instances of similar parts. The drawings generally illustrate various embodiments by way of example rather than limitation and, together with the description and claims, serve to explain embodiments of the utility model. Where appropriate, the same reference numerals are used in all drawings to refer to the same or similar parts. Such embodiments are illustrative and not intended to be exhaustive or exclusive embodiments of the apparatus or method.

[0026] Figure 1 This is a perspective view of the hoisting clamp provided in an embodiment of the present invention.

[0027] Figure 2 This is a three-dimensional structural view of the hoisting clamp provided in an embodiment of the present invention.

[0028] Figure 3 This is a view of the first use state of the hoisting clamp provided in an embodiment of the present invention.

[0029] Figure 4 This is a view of the second use state of the hoisting clamp provided in an embodiment of the present invention.

[0030] Figure label:

[0031] 10-Clamping component; 11-Column; 12-Slider; 13-Mounting plate; 14-Hollowed-out part; 20-Holding component; 21-Slide rail; 30-Linkage mechanism; 31-First link; 311-Upper rod section; 312-Lower rod section; 32-Second link; 33-Lifting ring; 41-Hook; 42-Pin; 50-Setting screw; 100-Workpiece; 200-Lifting rope. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0033] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0034] To keep the following description of the embodiments of this utility model clear and concise, detailed descriptions of known functions and known components are omitted.

[0035] like Figure 1 and 2 As shown, an embodiment of the present invention discloses a hoisting clamp, which includes: a holding component 20, a clamping component 10, and a linkage mechanism 30.

[0036] The retaining component 20 is configured as a laterally extending strip structure, and a slide rail 21 is mounted on the retaining component 20 or the retaining component 20 itself is configured as a slide rail 21.

[0037] The clamping components 10 include two, each clamping component 10 is configured as a plate frame structure, the two clamping components 10 are arranged opposite each other, so that the two clamping components 10 have opposite inner surfaces, the top of the clamping component 10 has a cutout portion 14, and a mounting plate 13 is fixed above the cutout portion 14, so that the two ends of the retaining component 20 pass through the cutout portion 14 of the clamping component 10, and a slider 12 is fixed at the bottom of the mounting plate 13. The slider 12 cooperates with the slide rail 21, so that the two clamping components 10 can slide along the extension direction of the slide rail 21, so that the two clamping components 10 can move closer to each other or further away from each other.

[0038] Each clamping component 10 has two columns 11 arranged at intervals and at the same height on the lower part of its inner side. Before using the clamp to lift the workpiece 100, the columns 11 of the two clamping components 10 are inserted into the bottom of both sides of the workpiece 100 to support the workpiece 100.

[0039] The linkage mechanism 30 includes two first links 31 and two second links 32. The two first links 31 are pivotally connected in the middle region and cross each other. The lower ends of the two first links 31 are pivotally connected to the mounting plate 13 at the upper end of the clamping member 10. The lower ends of the two second links 32 are pivotally connected to the upper ends of the two first links 31, and the upper ends of the two second links 32 are pivotally connected to each other. A lifting ring 33 is installed at the pivot point at the upper end of the two second links 32, and the lower end of the lifting rope 200 is connected to the lifting ring 33.

[0040] The working process of the above-mentioned hoisting clamp is described below.

[0041] When it is necessary to lift a workpiece of 100, such as Figure 3 As shown, the lifting rope 200 moves down, and the clamp moves down with the lifting rope 200. The two clamping parts 10 are manually pulled to move away from each other, or the two clamping parts 10 are manually forced to move away from each other by applying force to the connecting rod of the linkage mechanism 30. This makes the distance between the two clamping parts 10 greater than the width of the workpiece 100 and the two clamping parts 10 are located on both sides of the workpiece 100.

[0042] Then, the two clamping parts 10 are manually pushed closer to each other or the two clamping parts 10 are automatically moved closer to each other based on their own weight by lifting the hoisting rope 200 (the principle of using the weight of the clamping parts 10 to move the two clamping parts 10 closer to each other will be described below), thereby moving the lower column 11 of the two clamping parts 10 to the bottom of the workpiece 100 to support the workpiece 100.

[0043] like Figure 4 As shown, the lifting rope 200 is used to pull the clamp and workpiece 100 upwards. The weight of the workpiece 100 and the weight of the clamping component 10 cause torques to be generated in the linkage mechanism 30, which act on the two first links 31 respectively. The torques acting on the two first links 31 are basically equal in magnitude and opposite in direction. This causes the lower ends of the two second links 32 to apply forces in opposite directions and both towards the inside to the two clamping components 10. This force causes the two clamping components 10 to apply preload force on both sides of the workpiece 10. This preload force causes the two clamping components 10 to tend to move closer to each other. This can prevent the two clamping components 10 from separating from each other and causing the workpiece 100 to fall off during the lifting of the workpiece 100 because they are not being driven by the driving component.

[0044] The two clamping components 10 mentioned above can automatically move closer to each other by the weight of the clamping components 10 combined with the lifting of the suspension rope 200 and the force applied to the clamping components 10 through the connecting mechanism.

[0045] As can be seen from the above, the clamp provided by this utility model uses the linkage mechanism 30 to convert the weight of the workpiece 100 and the clamping component 10 into a force that makes the two clamping components 10 move closer to each other, thereby achieving stable lifting of the workpiece 100 and avoiding the need to use the driving component to apply force to keep the two clamping components 10 close together.

[0046] In some preferred configurations, the distance between the upper ends of the first connecting rods 31 is greater than the distance between the lower ends of the first connecting rods 31. The method for this is as follows: the first connecting rod 31 includes an upper rod segment 311 and a lower rod segment 312 integrally fixedly connected, and the two first connecting rods 31 are pivotally connected at the junction of the upper rod segment 311 and the lower rod segment 312; the length of the upper rod segment 311 is greater than the length of the lower rod segment 312, and the included angle between the upper rod segment 311 and the lower rod segment 312 is less than a straight angle (the upper rod segment 311 and the lower rod segment 312 have an included angle but are not located on the same straight line). The advantage of this configuration is that, when the clamping components 10 and the workpiece 100 have only a small self-weight, the connecting mechanism converts this small self-weight into a larger force that brings the two clamping components 10 closer together, thus making it suitable for lifting lightweight but not small workpieces 100.

[0047] In some preferred configurations, a pin 42 is provided on the second link 32, and a pivotable hook 41 is provided on the clamping component 10. By hooking the hook 41 onto the pin 42, the two first links 31 drive the two clamping components 10 to remain in a state of being far apart from each other. This allows the two clamping components 10 to be quickly positioned on both sides of the workpiece 100 without having to manually pull the two clamping components 10 beforehand to keep them in a state of being far apart.

[0048] In some preferred configurations, a set screw 50 with a handle at its outer end is provided through the side of each of the clamping components 10. By having the inner end of the set screw 50 abut against the retaining component 20 to restrict the sliding of the clamping component 10 relative to the retaining component 20, the two clamping components 10 are locked, thereby ensuring that the two clamping components 10 will not separate.

[0049] Furthermore, although exemplary embodiments have been described in this invention, its scope includes any and all embodiments based on this invention that have equivalent elements, modifications, omissions, combinations (e.g., schemes involving intersections of various embodiments), adaptations, or alterations. Elements in the claims will be interpreted broadly based on the language used in the claims and are not limited to the examples described in this specification or during the implementation of this application, which will be interpreted as non-exclusive. Therefore, this specification and examples are intended to be considered illustrative only, and the true scope and spirit are indicated by the following claims and the full scope of their equivalents.

[0050] The above description is intended to be illustrative and not restrictive. For example, the above examples (or one or more of them) can be used in combination with each other. Other embodiments can be used by those skilled in the art when reading the above description. Furthermore, in the above detailed description, various features may be grouped together to simplify the invention. This should not be construed as an intention that a disclosed feature not claimed is necessary for any claim. Rather, the subject matter of the invention may be less than all the features of a particular disclosed embodiment. Thus, the following claims are incorporated herein by reference as examples or embodiments, wherein each claim is an independent, separate embodiment, and these embodiments are contemplated to be combined with each other in various combinations or arrangements. The scope of the invention should be determined by reference to the appended claims and the full scope of their equivalents.

[0051] The above embodiments are merely exemplary embodiments of this utility model and are not intended to limit this utility model. The scope of protection of this utility model is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this utility model within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this utility model.

Claims

1. A hoisting clamp, characterized in that, include: The retaining component is configured as a laterally extending strip structure; The clamping component includes two clamping components arranged opposite to each other, and the upper part of each clamping component is slidably engaged with the holding component so that the two clamping components can move closer to each other or further away from each other; The linkage mechanism includes two first links and two second links. The two first links are pivotally connected at the middle and arranged in a crossed state. The lower ends of the two first links are respectively pivotally connected to the upper ends of the two clamping components. The lower ends of the two second links are respectively pivotally connected to the upper ends of the two first links. The upper ends of the two second links are pivotally connected to each other. The lower end of the suspension rope is connected to the pivot point of the upper ends of the two second links.

2. The hoisting clamp according to claim 1, characterized in that, This makes the distance between the upper ends of the first link greater than the distance between the lower ends of the first link.

3. The hoisting clamp according to claim 2, characterized in that, The first link includes an upper link segment and a lower link segment integrally fixedly connected, and two first links are pivotally connected at the junction area of ​​the upper link segment and the lower link segment; wherein: The length of the upper pole segment is greater than the length of the lower pole segment, and the included angle between the upper pole segment and the lower pole segment is less than a straight angle.

4. The hoisting clamp according to claim 1, characterized in that, The second link is provided with a pin, and the clamping component is provided with a pivotable hook. By hooking the hook onto the pin, the two first links drive the two clamping components to remain in a state of being far apart from each other.

5. The hoisting clamp according to claim 1, characterized in that, Both clamping components have an inwardly protruding anti-detachment component at their lower parts.

6. The hoisting clamp according to claim 5, characterized in that, The clamping component is configured as a plate frame structure; the anti-detachment component includes columns, and at least two columns are installed on the inner side of the lower part of each clamping component.

7. The hoisting clamp according to claim 1, characterized in that, The retaining component is provided with a laterally extending slide rail, and the clamping component is equipped with a slider that cooperates with the slide rail.

8. The hoisting clamp according to claim 7, characterized in that, A mounting plate is fixed to the top of the clamping component, and a hollow part is provided on the clamping component below the mounting plate. The slider is fixed to the bottom of the mounting plate, and the clamping component passes through the hollow part.

9. The hoisting clamp according to claim 1, characterized in that, A set screw with a handle at its outer end is provided through the side of each of the clamping components, and the inner end of the set screw is pressed against the retaining component to restrict the sliding of the clamping component relative to the retaining component.

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