CN219173589U - Floating centering clamping mechanism - Google Patents

Abstract

The utility model relates to the technical field of clamps, in particular to a floating centering clamping mechanism, which comprises a base, a conveying assembly, a clamping assembly and a floating assembly, wherein the clamping assembly comprises a power telescopic rod, a first clamping jaw and a second clamping jaw, and two ends of the power telescopic rod are respectively connected with the first clamping jaw and the second clamping jaw; a transport assembly mounted on the base and configured to drive the clamping assembly; the floating assembly comprises a fixed part and a movable part, the fixed part is fixedly connected with the conveying assembly, the number of the movable parts is two, the movable parts are respectively fixedly connected with the first clamping jaw and the second clamping jaw, and the movable part is in limit sliding connection with the fixed part along the clamping direction of the clamping assembly; when the clamping assembly is in a clamping state, the movable piece has movable displacement floating quantity relative to the fixed piece. The floating centering clamping mechanism can clamp the workpiece in the middle and effectively cope with positioning deviation caused by workpiece errors in the assembly process, so that the assembly requirement of batch products is met.

Description

Floating centering clamping mechanism

Technical Field

The utility model relates to the technical field of clamps, in particular to a floating centering clamping mechanism.

Background

In the automatic assembly process of batch products, a clamping mechanism is required to clamp and transfer one workpiece, and the workpiece is aligned to the other workpiece assembled with the workpiece, but certain product differences exist for some workpieces due to machining errors, so that the following two problems occur: the clamping mechanism clamps the workpiece too tightly or too loosely, the workpiece is easily damaged when too tightly clamped, and the workpiece is difficult to drive to transfer when too loosely clamped; secondly, when the clamping mechanism transfers the workpiece from the clamping station to the assembling station according to a preset distance, the two workpieces are difficult to align according to preset requirements, and the assembling quality is affected.

Disclosure of Invention

The utility model aims to provide a floating type centering clamping mechanism which can accurately clamp a workpiece to an assembly station and has a certain displacement floating amount so as to meet the assembly requirement of batch products.

To achieve the purpose, the utility model adopts the following technical scheme:

a floating centering clamping mechanism, which comprises a base, a clamping component, a conveying component and a floating component,

the clamping assembly comprises a power telescopic rod, a first clamping jaw and a second clamping jaw, wherein two ends of the power telescopic rod are respectively connected with the first clamping jaw and the second clamping jaw so as to drive the first clamping jaw and the second clamping jaw to approach or depart from each other; the conveying assembly is mounted on the base and is configured to drive the clamping assembly to move; the floating assembly comprises a fixed piece and a movable piece, wherein the fixed piece is fixedly connected with the conveying assembly, the number of the movable pieces is two, the movable pieces are respectively fixedly connected with the first clamping jaw and the second clamping jaw, and the movable pieces are in limiting sliding connection with the fixed piece along the clamping direction of the clamping assembly; when the clamping assembly is in a clamping state, the movable piece has movable displacement floating quantity relative to the fixed piece.

Preferably, the fixing part is a stop lever extending along the length direction of the power telescopic rod, the movable part is a stop block, two stop blocks are respectively arranged on opposite sides of the first clamping jaw and the second clamping jaw, a stop slot is formed in one side of the stop block, which faces the stop lever, and the stop lever can reciprocate within the length range of the stop slot along the length direction of the stop lever.

Preferably, the limiting rod comprises a positioning block, a first supporting rod and a second supporting rod, the positioning block is fixed on the conveying assembly, and the first supporting rod and the second supporting rod are respectively fixed on two sides of the positioning block facing the first clamping jaw and the second clamping jaw.

Preferably, the axes of the first and second struts are parallel but not coincident.

Preferably, the positioning block is detachably connected with the conveying assembly.

Preferably, the floating assembly further comprises an adjusting screw, one end of the adjusting screw is rotatably connected with the first clamping jaw/the second clamping jaw, and the other end of the adjusting screw is in threaded connection with the limiting block.

Preferably, the floating assembly further comprises a buffer, and one end of the adjusting screw penetrating through the limiting groove is connected with the buffer.

Preferably, the clamping assembly further comprises a connecting rod, one end of the connecting rod is detachably connected with the first clamping jaw or the second clamping jaw, and the other end of the connecting rod is connected with the power telescopic rod.

Preferably, the first jaw and the second jaw are slidably connected to the base.

Preferably, the conveying assembly comprises a screw and a nut, the screw is arranged on the base along the extending and contracting direction of the power extending and contracting rod, and the fixing piece is fixedly connected with the nut sleeved on the screw.

The beneficial effects of the utility model are as follows: the floating centering clamping mechanism is connected with the first clamping jaw and the second clamping jaw through the power telescopic rod, so that a workpiece can be clamped in the middle, the clamping force is moderate, the workpiece cannot be clamped excessively, and the clamping force on the workpiece cannot be lost due to excessive loosening; meanwhile, the floating assembly is arranged, so that positioning deviation caused by workpiece errors in the assembly process can be effectively treated, and the assembly requirement of batch products is met.

Drawings

FIG. 1 is a schematic perspective view of a floating centering clamp mechanism according to an embodiment of the present utility model;

FIG. 2 is a front view of a floating centering clamp mechanism as set forth in an embodiment of the present utility model;

FIG. 3 is an enlarged schematic view at A in FIG. 2;

FIG. 4 is a top view of a floating centering clamp mechanism as set forth in an embodiment of the present utility model;

fig. 5 is a side view of a floating centering clamp mechanism as set forth in an embodiment of the present utility model.

In the figure, 1, a base; 2. a transport assembly; 3. a floating assembly; 31. a limit rod; 31a, positioning blocks; 31b, a first strut; 31c, a second strut; 32. a limiting block; 32a, a limit groove; 32b, steps; 33. adjusting a screw; 34. a buffer; 4. a clamping assembly; 41. a first jaw; 42. a second jaw; 43. a power telescopic rod; 44. a connecting rod; 45. a supporting plate; 46. a guide block; 5. a plastic sucking disc; 51. an outer edge; 52. a groove; 6. a slide rail; 7. a slide block; 8. and (5) a mounting seat.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of operation, and are not intended to indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The embodiment provides a floating centering clamping mechanism, which is mainly used for clamping and transferring in the automatic assembly process of batch products, and can transfer a clamped workpiece from a clamping station to an assembly station, so that accurate positioning with another workpiece is realized. The floating centering clamp mechanism of this embodiment, which clamps the suction disc to transfer the workpiece, will be described in detail below taking a workpiece placed in the suction disc as an example.

Referring to fig. 1-5, the floating centering clamping mechanism in this embodiment includes a base 1, a conveying component 2, a floating component 3 and a clamping component 4, where the conveying component 2 is fixed on the base 1 and connected with the clamping component 4 through the floating component 3, the conveying component 2 is configured to drive the floating component 3 and the clamping component 4 to integrally move, the clamping component 4 has a clamping state and a releasing state, and specifically includes a power telescopic rod 43, a first clamping jaw 41 and a second clamping jaw 42, and two ends of the power telescopic rod 43 are respectively connected with the first clamping jaw 41 and the second clamping jaw 42 so as to drive the first clamping jaw 41 and the second clamping jaw 42 to approach or separate. The floating assembly 3 comprises a fixed part and a movable part, wherein the fixed part is fixedly connected with the conveying assembly 2 through a mounting seat 8, the number of the movable parts is two, the movable parts are fixedly connected with the first clamping jaw 41 and the second clamping jaw 42 respectively, the movable parts are in limiting sliding connection with the fixed part along the clamping direction of the clamping assembly 4, and when the clamping assembly 4 is in a clamping state, the movable parts have movable displacement floating amounts relative to the fixed parts.

For convenience in describing the operation of the clamping assembly 4, it is assumed that the first clamping jaw 41 is connected to a power end of the power telescopic rod 43, and the second clamping jaw 42 is connected to a fixed end of the power telescopic rod 43. Initially, the suction disc 5 containing the workpiece is placed at a clamping station, the central axis of the suction disc 5 is aligned with the mounting seat 8, when the power telescopic rod 43 is extended, the first clamping jaw 41 moves away from the second clamping jaw 42 until the movable part connected with the first clamping jaw 41 moves to the farthest distance relative to the fixed part, and the second clamping jaw 42 moves away from the first clamping jaw 41 until the movable part connected with the second clamping jaw 42 moves to the farthest distance relative to the fixed part, at this time, the distances between the first clamping jaw 41 and the fixed part and between the second clamping jaw 42 and the fixed part are the same (the fixed part is fixed on the mounting seat 8, so the distances between the first clamping jaw 41 and the suction disc 5 and between the second clamping jaw 42 and the suction disc 5 are the same); when the power telescopic rod 43 contracts, the first clamping jaw 41 moves close to the second clamping jaw 42 until the first clamping jaw 41 contacts with the plastic sucking disc 5, the first clamping jaw 41 stops moving due to the resistance of the plastic sucking disc 5, at the moment, the second clamping jaw 42 moves towards the first clamping jaw 41 until the plastic sucking disc 5 is touched, the clamping assembly 4 clamps in place, then the clamping assembly 4 is driven by the conveying assembly 2 to transfer the plastic sucking disc 5 to the assembly station, when the position deviation of the plastic sucking disc 5 and a workpiece of the assembly station occurs due to workpiece errors, the first clamping jaw 41 or the second clamping jaw 42 can be pushed according to the position deviation direction, and because the movable piece can move relative to the fixed piece, even if the conveying assembly 2 stops moving relative to the base 1 at the moment, the first clamping jaw 41 and the second clamping jaw 42 still can generate certain displacement relative to the base 1 (limited by the power telescopic rod 43, the first clamping jaw 41 and the second clamping jaw 42 synchronously move), and the whole clamping assembly 4 can keep clamping force on the plastic sucking disc 5 and generate certain displacement, and thus the assembly precision requirement is met.

The floating assembly 3 can achieve the above functions in various manners, in one embodiment, the fixing member is provided with a stop lever 31 extending along the length direction of the power telescopic rod 43, the moving member is provided with a stop block 32, two stop blocks 32 are respectively installed on opposite sides of the first clamping jaw 41 and the second clamping jaw 42, a stop groove 32a is formed in one side of the stop block 32 facing the stop lever 31, two ends of the stop lever 31 are provided with limiting heads, and the limiting heads are located in the stop groove 32a and can do reciprocating motion along the length direction of the stop lever 31 within the length range of the stop groove 32 a. It should be noted that, the length of the stop lever 31 is smaller than the length of the plastic sucking disc 5, and meanwhile, the sum of the lengths of the stop lever 31 and the limiting groove 32a is larger than the length of the plastic sucking disc 5, so that when the first clamping jaw 41 and the second clamping jaw 42 clamp the plastic sucking disc 5, the stop lever 31 is not abutted with the side walls on two sides of the length of the limiting groove 32a, so that a certain movable space exists between the stop lever 31 and the limiting block 32, and the limiting block 32 has a certain displacement floating amount.

Specifically, the limiting rod 31 includes a positioning block 31a, a first supporting rod 31b and a second supporting rod 31c, the positioning block 31a is centrally installed on the installation seat 8, the first supporting rod 31b and the second supporting rod 31c are respectively fixed on two sides of the positioning block 31a facing the first clamping jaw 41 and the second clamping jaw 42, axes of the first supporting rod 31b and the second supporting rod 31c are parallel but do not coincide, and a step 32b is arranged at an opening of the limiting groove 32a to prevent the limiting rod 31 from being separated from the limiting block 32. When the limiting head on the limiting rod 31 is abutted against the step 32b, the distance between the first clamping jaw 41 and the second clamping jaw 42 is the farthest, and when the first clamping jaw 41 and the second clamping jaw 42 clamp the plastic sucking disc 5, the limiting head is a certain distance from the step 32b and the bottom of the limiting groove 32a, so that the floating amount is reserved for the movement of the limiting block 32. The sizes of the plastic sucking discs 5 adopted by the workpieces with different sizes are different, in order to enlarge the application range of the floating type centering clamping mechanism in the embodiment, the positioning block 31a is detachably connected with the mounting seat 8, and when the plastic sucking discs 5 with different sizes are clamped, the limiting rod 31 can be replaced according to the lengths of the plastic sucking discs 5.

The displacement floating amount requirement range of the movable part relative to the fixed part is different for different plastic sucking discs 5 for accommodating different workpieces. For this reason, the floating assembly 3 further includes an adjusting screw 33 and a buffer 34, the adjusting screw 33 is used for adjusting the movable range of the movable member, the buffer 34 is used for avoiding the fixed member from colliding with the adjusting screw 33, one end of the adjusting screw 33 is rotationally connected with the first clamping jaw 41/the second clamping jaw 42, the other end of the adjusting screw 33 penetrates into the limiting groove 32a to be connected with the buffer 34, the adjusting screw 33 is in threaded connection with the movable member, and the position of the buffer 34 in the limiting groove 32a can be adjusted by rotating the adjusting screw 33, so that the displacement floating amount of the movable member relative to the fixed member is adjusted.

In other embodiments, the fixing member may be a limiting sleeve, where the movable member is a limiting rod 31, and the number of limiting rods 31 is two, and the limiting rods 31 are respectively installed on opposite sides of the first clamping jaw 41 and the second clamping jaw 42, and one end of the limiting rod 31, which is close to the limiting sleeve, is inserted into the limiting sleeve and can reciprocate in the limiting sleeve.

It should be understood that the floating assembly 3 is not limited to the above two structures, and only needs to be satisfied that the movable member has a displacement floating amount moving along the clamping direction of the clamping assembly 4 relative to the fixed member when the clamping assembly 4 is in the clamped state.

In this embodiment, the power telescopic rod 43 may be an air cylinder or a hydraulic cylinder, etc., in order to eliminate the influence of the size of the plastic suction disc 5 on the length of the power telescopic rod 43, the clamping assembly 4 further includes a connecting rod 44, one end of the connecting rod 44 is detachably connected with the first clamping jaw 41 or the second clamping jaw 42, the other end of the connecting rod 44 is connected with the power telescopic rod 43, and the connecting rod 44 can be replaced according to the length of the plastic suction disc 5. It is understood that the number of the connecting rods 44 may be two, and the two connecting rods 44 are respectively fixed to the first clamping jaw 41 and the second clamping jaw 42 and connected through the power telescopic rod 43.

Referring to fig. 4, the outer periphery of the plastic tray 5 is generally provided with an outer edge 51, and at the same time, the outer edge 51 is further provided with a guiding groove formed by concavely forming the plastic tray 5, for the floating centering clamping mechanism in this embodiment for clamping the plastic tray 5, the first clamping jaw 41 and the second clamping jaw 42 are symmetrical with respect to the mounting seat 8, taking the first clamping jaw 41 as an example, the first clamping jaw 41 is further provided with a supporting plate 45 and a guiding block 46, the first clamping jaw 41 is provided with an L shape, the supporting plate 45 and the guiding block 46 are all arranged inside the first clamping jaw 41, the number of the guiding blocks 46 is two, and the supporting plate 45 is respectively located at two sides of the length of the supporting plate 45 and corresponds to the guiding groove one by one, and can move to the lower side of the outer edge 51 arranged at the outer periphery of the plastic tray 5 and support the plastic tray 5, and the guiding block 46 can be inserted into the guiding groove for limiting the position of the plastic tray 5 perpendicular to the clamping direction of the clamping assembly. Of course, the structure of the first clamping jaw 41 and the second clamping jaw 42 is not limited to the structure capable of clamping only the workpiece placed in the plastic tray 5, and for other workpieces, the supporting plate 45 may be moved below the workpiece so that the supporting plate 45 directly contacts the bottom of the workpiece. The specific shape and configuration of the first clamping jaw 41 and the second clamping jaw 42 may also be adjusted according to the shape and configuration of the workpiece, which is not limited herein.

Further, the first clamping jaw 41 and the second clamping jaw 42 are both in sliding connection with the base 1, so that stability of the first clamping jaw 41 and the second clamping jaw 42 when moving close to or away from each other is guaranteed. Specifically, the base 1 is provided with a slide rail 6 disposed along the extending direction of the power extending rod 43, and the first clamping jaw 41 and the second clamping jaw 42 are in sliding fit with the base 1 through a sliding block 7 disposed on the slide rail 6. Illustratively, the number of slide rails 6 is two to further improve the smoothness of movement of the first and second jaws 41, 42.

In this embodiment, the conveying assembly 2 is implemented by adopting a screw-nut pair structure, so as to have higher conveying precision. Specifically, the screw rod is rotatably mounted on the base 1 along the extending direction of the power extending rod 43, one end of the screw rod is connected with the output end of the power member, and the power member provides rotary power for the screw rod, and the power member may specifically be a rotary motor. The two slide rails 6 are respectively positioned on two sides of the width of the screw, the mounting seat 8 is fixedly connected with a nut sleeved on the screw, and the mounting seat 8 can drive the floating assembly 3 and the clamping assembly 4 to do linear motion when the screw rotates so as to transfer the plastic sucking disc 5 clamped by the clamping assembly 4 from the clamping station to the assembly station. In other embodiments, the conveying assembly 2 may also be implemented by using a meshed rack-and-pinion structure or other conveying assemblies 2 with self-locking function.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. Floating centering clamping mechanism, its characterized in that includes:

a base (1);

the clamping assembly (4) comprises a power telescopic rod (43), a first clamping jaw (41) and a second clamping jaw (42), wherein two ends of the power telescopic rod (43) are respectively connected with the first clamping jaw (41) and the second clamping jaw (42) so as to drive the first clamping jaw (41) and the second clamping jaw (42) to be close to or far away from each other;

-a transport assembly (2), the transport assembly (2) being mounted on the base (1) and configured to drive the gripping assembly (4) in movement;

the floating assembly (3), the floating assembly (3) comprises a fixed part and a movable part, the fixed part is fixedly connected with the conveying assembly (2), the number of the movable parts is two, the movable parts are fixedly connected with the first clamping jaw (41) and the second clamping jaw (42) respectively, and the movable part and the fixed part are in limiting sliding connection along the clamping direction of the clamping assembly (4);

when the clamping assembly (4) is in a clamping state, the movable piece has movable displacement floating quantity relative to the fixed piece.

2. The floating centering clamping mechanism according to claim 1, wherein the fixing member is a limiting rod (31) extending along the length direction of the power telescopic rod (43), the moving member is a limiting block (32), two limiting blocks (32) are respectively installed on opposite sides of the first clamping jaw (41) and the second clamping jaw (42), a limiting groove (32 a) is formed in one side, facing the limiting rod (31), of the limiting block (32), and the limiting rod (31) can do reciprocating motion within the length range of the limiting groove (32 a) along the length direction of the limiting rod (31).

3. The floating centering clamp mechanism according to claim 2, wherein the limit bar (31) comprises a positioning block (31 a), a first support bar (31 b) and a second support bar (31 c), the positioning block (31 a) is fixed on the conveying assembly (2), and the first support bar (31 b) and the second support bar (31 c) are respectively fixed on two sides of the positioning block (31 a) facing the first clamping jaw (41) and the second clamping jaw (42).

4. A floating centering clamp mechanism as claimed in claim 3, characterized in that the axes of the first and second struts (31 b, 31 c) are parallel but not coincident.

5. A floating centering clamp mechanism according to claim 3, characterized in that the positioning block (31 a) is detachably connected to the transport assembly (2).

6. A floating centering clamp mechanism according to claim 2, characterized in that the floating assembly (3) further comprises an adjusting screw (33), one end of the adjusting screw (33) is rotatably connected with the first clamping jaw (41)/the second clamping jaw (42), and the other end is in threaded connection with the limiting block (32).

7. A floating centering clamp mechanism as claimed in claim 6, characterized in that the floating assembly (3) further comprises a buffer (34), one end of the adjusting screw (33) penetrating the limit groove (32 a) being connected with the buffer (34).

8. A floating centering clamp mechanism according to claim 1, characterized in that the clamping assembly (4) further comprises a connecting rod (44), one end of the connecting rod (44) being detachably connected to the first clamping jaw (41) or the second clamping jaw (42), the other end being connected to the power telescopic rod (43).

9. A floating centering clamp mechanism according to claim 1, characterized in that the first clamping jaw (41) and the second clamping jaw (42) are slidingly connected with the base (1).

10. A floating centering clamp mechanism as claimed in claim 1, wherein the transport assembly (2) comprises a screw, a nut and a power member, the screw is rotatably mounted on the base (1) along the telescopic direction of the power telescopic rod (43), the power member provides rotary power for the screw, and the fixing member is fixedly connected with the nut sleeved on the screw.

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