TW201929141A - Clamping device - Google Patents

Abstract

A clamping device includes a base and a clamping assembly. The clamping assembly includes a first clamping member pivoted on the base by a first pivotal joint and a second clamping member pivoted on the base by a second pivotal joint, and the first pivotal joint is spaced apart from the second pivotal joint. Both the first clamping member and the second clamping member are pivotal so that the base is at either a clamping state or a releasing state. At the clamping state, a reference pivot line passing through the first pivotal joint and the second pivotal joint is substantially orthogonal to a first extension line, which passes through a clamping point of the first clamping member and the first pivotal joint, and a second extension line, which passes through a clamping point of the second clamping member and the second pivotal joint.

Description

Clamping device

The present invention relates to a clamping device, and more particularly to a clamping device adapted to hold a small article.

Clamping devices have been widely used in the fields of automated production or automated inspection to move and transport objects. For example, a gripping device in an existing biodetection device can be used to hold a small test tube storing a biological specimen such as blood for subsequent transport of the test tube to a predetermined position. In response to the trend toward miniaturization and weight reduction of biodetection devices, the clamping device to be mounted must also meet the requirements for miniaturization and weight reduction. In addition, since the test tube is a relatively fragile object, the clamping arm of the clamping device is usually driven by the elastic force of the spring to clamp the test tube to avoid excessive clamping force and damage the test tube.

For a clamping device that grips an object with a spring-driven clamping device, the spring force of the spring is designed to correspond to a sufficient length of the arm to create a torque sufficient to rotate the clamping arm. At the same time, in order to make the clamping device meet the needs of clamping small objects, the structural design also makes the clamping surface of the clamping arm as far as possible away from the pivot point of the clamping arm. However, the above structural design causes the clamping device to move the object to be moved upward, and the force applied by the object to the clamping surface also generates a moment with respect to the rotation fulcrum of the clamping arm, and if the moment is greater than the elastic force of the spring When the torque is applied, the clamp arm will open and cause the object to fall.

In view of the above problems, the present invention discloses a clamping device which helps to solve the problem that the force applied to the clamping surface by the object in the clamping member can rotate the clamping arm to cause the object to fall.

The clamping device disclosed in the present invention comprises a base and a clamping assembly. The clamping assembly includes a first clamping member and a second clamping member. The first clamping member is pivotally centered on the base with a first pivoting point, and the second clamping member is pivotally centered on the base by a second pivoting point, and the first pivoting point It is spaced apart from the second pivot point. The first clamping member and the second clamping member each have a clamping point. The first clamping member and the second clamping member are pivotable relative to the base, and the clamping assembly has a clamping state in which the two clamping points are close to each other and a distance between the two clamping points Release status. In the clamping state, a pivot line passing through the first pivot point and the second pivot point is substantially orthogonal to a first extension line passing through the nip point of the first clamping member and the first pivot point and A second extension line is passed through the nip point of the second clamping member and the second pivot point.

A further clamping device according to the invention comprises a base, a clamping assembly and a pushing member. The clamping assembly includes a first clamping member and a second clamping member. The first clamping member is pivotally centered on the base with a first pivoting point, and the second clamping member is pivotally centered on the base by a second pivoting point. The first pivot point is spaced apart from the second pivot point. The first clamping member and the second clamping member each comprise a clamping portion, a pushing portion and a pivoting portion. The clamping portion has a clamping point, the pivoting portion is pivoted on the base, and the pushed portion has a push point. The pushed portion of the first clamping member extends toward the second clamping member, and the pushed portion of the second clamping member extends toward the first clamping member. The pusher member is movable relative to the clamp assembly to urge the respective push points of the first clamp member and the second clamp member. a distance between the pushed point of the first clamping member and the first pivoting point and a pushed point of the second clamping member in a direction of a pivotal connection between the first pivoting point and the second pivoting point The sum of the distances from the second pivot point is greater than the distance between the first pivot point and the second pivot point.

The clamping device disclosed in the present invention further comprises a base and a clamping member. The clamping member is pivotally centered on the base with a pivot point. The clamping member has a gripping point and the gripping member is pivotable relative to the base to have a gripping condition adapted to grip the article. The clamping device is movable in the direction of an object. In the clamped state, an extension line passing through the nip point in the direction of the object passes through the pivot point.

Still further disclosed in the present invention includes a base, a clamping member and an elastic member. The clamping member is pivotally centered on the base with a pivot point. The clamping member has a gripping point and the gripping member is pivotable relative to the base to have a gripping condition adapted to grip the article. The elastic member is disposed between the clamping member and the base. The clamping device is movable in the direction of an object. A pivotal connection through the pivot point is substantially orthogonal to the direction of the object. In the clamping state and in the direction of the pivot line, the distance between the extension line passing through the nip point and the pivot point along the object taking direction is less than 10% of the distance between the pivot point and the center of the elastic member.

According to the clamping device disclosed in the present invention, by the appropriate structural design, the extending direction of the force applied by the clamped object to the clamping member via the nip point passes through the pivoting point of the clamping member without Torque is generated, or the moment generated by the force applied to the clamping member is extremely small and is not sufficient to open the clamping member. Therefore, compared with the conventional clamping device, the clamping device of the embodiment can stably hold the clamping device even when the object and the clamping member are pulled when the object is transported, thereby being firmly fixed. Hold the object.

The above description of the disclosure and the following description of the embodiments of the present invention are intended to illustrate and explain the spirit and principles of the invention, and to provide further explanation of the scope of the invention.

The detailed features and advantages of the present invention are set forth in the Detailed Description of the Detailed Description of the <RTIgt; </ RTI> <RTIgt; </ RTI> </ RTI> </ RTI> <RTIgt; The objects and advantages associated with the present invention can be readily understood by those skilled in the art. The following examples are intended to describe the present invention in further detail, but are not intended to limit the scope of the invention.

Please refer to FIG. 1 to FIG. 3 at the same time. 1 is a perspective view of a holding device according to a first embodiment of the present invention. Figure 2 is an exploded perspective view of the clamping device of Figure 1. Figure 3 is a front elevational view of the clamping device of Figure 1. In the present embodiment, the clamping device 1 includes a base 10, a clamping assembly 20 and a pushing member 30.

The base 10 is, for example but not limited to, a stage that is fixed to the ground. The clamping assembly 20 includes a first clamping member 210, a second clamping member 220, and a plurality of elastic members 230. The first clamping member 210 and the second clamping member 220 are pivoted to the base 10 . The first clamping member 210 includes a connecting pivot portion 211 , a clamping portion 212 and a pushed portion 213 . The pushing portion 213 and the clamping portion 212 are located on opposite sides of the pivoting portion 211. The pivoting portion 211 of the first clamping member 210 is pivoted as the first pivoting point P1. It is provided on the base 10. The pivoting portion 211 has a receiving recess 2111. The clamping portion 212 has a clamping surface 212a, and the clamping surface 212a has a clamping point 2121. The receiving portion 213 and the receiving recess 2111 are located on the same side of the pivoting portion 211, and the pushed portion 213 has a pushed point 2131.

The second clamping member 220 includes a connected pivoting portion 221 , a clamping portion 222 , and a pushed portion 223 . The pushing portion 223 and the clamping portion 222 are located on opposite sides of the pivoting portion 221 . The other pivot of the base 10 and the second clamping member 220 serves as a second pivot point P2 spaced apart from the first pivot point P1, and the pivoting portion 221 of the second clamping member 220 is The second pivot point P2 is pivotally centered on the base 10. The clamping portion 222 has a clamping surface 222a facing the clamping surface 212a of the first clamping member 210, and the clamping surface 222a has a clamping point 2221. The pivoting portion 221 has a receiving recess 2211. The pushed portion 223 and the receiving recess 2211 are located on the same side of the pivoting portion 221, and the pushed portion 223 has a pushed point 2231. The pushed portion 213 of the first clamping member 210 extends toward the second clamping member 220 and is located within the receiving recess 2211 of the second clamping member 220. The pushed portion 223 of the second clamping member 220 extends toward the first clamping member 210 and is located within the receiving recess 2111 of the first clamping member 210.

The first clamping member 210 and the second clamping member 220 are pivotable relative to the base 10, so that the clamping assembly 20 has a released state (please refer to FIG. 4 first) and a clamping state (please refer to FIG. 5 first). . In the clamped state, the two clamping points 2121 and 2221 are close to each other, so that the first clamping member 210 and the second clamping member 220 are adapted to collectively hold an object. In the released state, the two clamping points 2121 and 2221 are apart from each other, and the first clamping member 210 and the second clamping member 220 can release the articles held in the clamped state. As shown in FIG. 3, a pivot line L1 passes through the first pivot point P1 and the second pivot point P2, and a first extension line L2 passes through the nip point 2121 of the first clamping member 210 and the first pivot point P1. And a second extension line L3 passes through the nip point 2221 of the second clamping member 220 and the second pivot point P2. In the present embodiment, when the clamp assembly 20 is in the clamped state, the pivot line L1 is substantially orthogonal to the first extension line L2 and the second extension line L3 in the direction of the pivot line L1. In addition, the distance D1 between the pushed point 2131 of the first clamping member 210 and the first pivot point P1 and the distance D2 between the pushed point 2231 of the second clamping member 220 and the second pivot point P2 The sum (D1+D2) is greater than the distance D3 between the first pivot point P1 and the second pivot point P2. In addition, the distance between the two clamping points 2121 and 2221 will be equal to the distance D3 between the first pivot point P1 and the second pivot point P2.

The elastic member 230 is, for example but not limited to, a compression spring disposed between the first clamping member 210 and the base 10 and between the second clamping member 220 and the base 10. The first clamping member 210 and the second clamping member 220 are pivotable relative to the base 10 to compress the elastic member 230. The number of elastic members 230 is not intended to limit the invention.

The pushing member 30 is, for example but not limited to, a pressing rod that is movable relative to the clamping assembly 20 to push against the pushed point 2131 of the first clamping member 210 and the pushed point 2231 of the second clamping member 220, such that application The pushing force generates a torque with respect to the first pivot point P1 and the second pivot point P2, thereby driving the first clamping member 210 and the second clamping member 220 to pivot relative to the base 10.

The manner in which the gripping device 1 grips an object will be described below. Please refer to FIG. 4 and FIG. 5 together. Figure 4 is a front elevational view of the holding device of Figure 3 in a released state. Figure 5 is a front elevational view of the holding device of Figure 3 holding the article.

When the pushing member 30 pushes against the first clamping member 210 and the second clamping member 220, the clamping assembly 20 can be changed from the clamped state to the released state. As shown in FIGS. 4 and 5, when the clamping assembly 20 is in the released state, the pushing member 30 remains pushed against the pushed points 2131, 2231, while the first clamping member 210 and the second clamping member 220 compress the elastic members. 230, so that the elastic member 230 stores the elastic potential energy. At this time, the distance between the nip point 2121 and the nip point 2221 is greater than the width of an object 2 to be clamped, so that the clamping device 1 can move closer to the object 2 so that the object 2 is interposed between the nip point 2121 and the clip. Hold between 2221. The object 2 is, for example, a plastic test tube, but the invention is not limited thereto.

When the pushing force applied by the pushing member 30 to the pushed points 2131, 2231 is removed, the elastic member 230 releases the elastic potential energy, and drives the clamping assembly 20 to change from the released state to the clamped state. When the clamp assembly 20 is in the clamped state, the nip points 2121 and 2221 approach each other to touch the object 2, and the elastic member 230 urges the clamp assembly 20 to apply a clamping force to the article 2 via the nip points 2121 and 2221.

After the clamping of the object 2 is completed, the holding device 1 in the clamped state can be moved in the object taking direction A to carry the article 2. As shown in FIG. 5, when the clamping device 1 moves in the object taking direction A, the weight of the object 2 itself or the interference between the object 2 and the nip points 2121, 2221 causes the object 2 to pass through the nip points 2121, 2221. A force F is applied to the first clamping member 210 and the second clamping member 220. However, the extending direction of the force F may pass through the first pivot point P1 or the second pivot point P2, so the force F applied to the first clamping member 210 does not generate a moment with respect to the first pivot point P1. And the force F applied to the second holding member 220 does not generate a moment with respect to the second pivot point P2. Therefore, compared with the conventional clamping device, the clamping device 1 of the present embodiment can not generate a moment when the object 2 and the clamping assembly 20 are pulled when the object is conveyed, which helps the torque. The holding device 1 is stably held in the clamped state, so that the object 2 can be firmly held.

In this embodiment, the distance D1 between the pushed point 2131 of the first clamping member 210 and the first pivot point P1 and the pushed point 2231 of the second clamping member 220 and the second pivot point P2 The sum of the distances D2 is greater than the distance D3 between the first pivot point P1 and the second pivot point P2. Thereby, the pushed portion 213 of the first clamping member 210 and the pushed portion 223 of the second clamping member 220 coincide in one of the radial directions of the clamping device 1 (as shown in FIG. 3), and the clip is clamped. The first pivot point P1 and the second pivot point P2 of the holding device 1 can be closer to each other than the two pivot points in the existing clamping device, while still allowing the pushing force applied to the pushed points 2131, 2231 There are sufficient arm lengths relative to the first pivot point P1 and the second pivot point P2, respectively. In addition, since the first pivot point P1 and the second pivot point P2 are closer to each other, the opening degree of the first clamping member 210 and the second clamping member 220 when the clamping assembly 20 is in the released state It is also not too large, and contributes to miniaturization of the holding device 1.

Figure 6 is a front elevational view of a clamping device in accordance with a second embodiment of the present invention. Since the second embodiment is similar to the first embodiment, the following description will be made on the difference.

In the present embodiment, the first clamping member 210 of the clamping device 1a is pivotally centered on the base 10 with the first pivot point P1 as a pivoting center, and the second clamping member 220 is fixed to the base 10. In other words, only the first clamping member 210 of the clamping assembly 20 of the present embodiment can pivot relative to the base 10. As shown in FIG. 2, when the clamping assembly 20 is in the clamped state, the first extension line L1 passing through the nip point 2121 along the object taking direction A passes through the first pivot point P1.

The clamping device in the first and second embodiments does not generate a moment when the object is applied to the clamping member, but the invention is not limited thereto. Figure 7 is a front elevational view of a clamping device in accordance with a third embodiment of the present invention. Since the third embodiment is similar to the first embodiment, the following description will be made on the difference.

In the present embodiment, the clamping assembly 20 of the clamping device 1b is in the clamping state, in the direction of the pivoting line L1 passing through the first pivotal point P1 and the second pivotal point P2, along the direction of the object A. The distance S1 between the first extension line L1 and the first pivot point P1 in the direction of the pivot line L1 through the first extension line L2 of the nip point 2121 is smaller than the first pivot point P1 and the base 10 and the first holder 210 are disposed. 10% of the distance S2 between the centers of the elastic members 230 (that is, S1 < S2 × 10%). Similarly, the distance S3 between the second extension line P2 in the direction of the pivot line L1 and the second pivot point P2 along the second extension line L3 of the nip point 2221 is smaller than the second pivot point P2 and is disposed at the base. 10% of the distance S4 between the centers of the elastic members 230 between the seat 10 and the second holding member 220 (that is, S3 < S4 × 10%). Thereby, when the holding device 1 is carrying the article, the force applied by the article to the first clamping member 210 and the second clamping member 220 cannot generate a moment or only generate a very small moment.

In summary, in the clamping device disclosed in the present invention, the extending direction of the force applied by the clamped object to the clamping member via the clamping point is passed through the clamping member by a suitable structural design. The pivot point does not generate a moment, or the moment exerted by the force applied to the clamping member is extremely small and is not sufficient to resist the moment generated by the elastic force of the elastic member. Therefore, compared with the conventional clamping device, the clamping device of the embodiment can stably hold the clamping device even when the object and the clamping member are pulled when the object is transported, thereby being firmly fixed. Hold the object.

Although the present invention has been disclosed above in the foregoing embodiments, these embodiments are not intended to limit the invention. It is within the scope of the invention to be modified and modified without departing from the spirit and scope of the invention. Please refer to the attached patent application for the scope of protection defined by the present invention.

1, 1a, 1b‧‧‧ clamping device

2‧‧‧ objects

10‧‧‧ Pedestal

20‧‧‧Clamping components

210‧‧‧First clamping part

211‧‧‧ pivotal department

2111‧‧‧ 容 recess

212‧‧‧ gripping department

212a‧‧‧ clamping surface

2121‧‧‧Clamping point

213‧‧‧Subjected

2131‧‧‧Accepted

220‧‧‧Second grip

221‧‧‧ pivotal department

2211‧‧‧ 容 recess

222‧‧‧ gripping department

222a‧‧‧ clamping surface

2221‧‧‧Clamping point

223‧‧‧Subjected

2231‧‧‧Recommended

230‧‧‧Flexible parts

30‧‧‧Parts

A‧‧‧ direction of the object

D1, D2, D3‧‧‧ distance

F‧‧‧force

P1‧‧‧ first pivot point

P2‧‧‧ second pivot point

L1‧‧‧ pivot cable

L2‧‧‧ first extension line

L3‧‧‧ second extension line

S1, S2, S3, S4‧‧‧ distance

1 is a perspective view of a holding device according to a first embodiment of the present invention. Figure 2 is an exploded perspective view of the clamping device of Figure 1. Figure 3 is a front elevational view of the clamping device of Figure 1. Figure 4 is a front elevational view of the holding device of Figure 3 in a released state. Figure 5 is a front elevational view of the holding device of Figure 3 holding the article. Figure 6 is a front elevational view of a clamping device in accordance with a second embodiment of the present invention. Figure 7 is a front elevational view of a clamping device in accordance with a third embodiment of the present invention.

Claims (10)

A clamping device comprising: a base; and a clamping assembly comprising a first clamping member and a second clamping member, the first clamping member pivoting a central pivot point The first clamping member is pivotally centered on the base by a second pivoting point, and the first pivoting point is spaced apart from the second pivoting point, the first clamping member The holding member and the second clamping member each have a clamping point, and the first clamping member and the second clamping member are pivotable relative to the base such that the clamping assembly has the two clamping points close to each other a clamping state and a release state of the two clamping points away from each other; wherein, in the clamping state, a pivotal connection through the first pivoting point and the second pivoting point is substantially orthogonal to passing a first extension line of the nip point of the first clamping member and the first pivot point and an alignment orthogonal to the nip point and the second pivot point of the second clamping member Two extension lines. The clamping device of claim 1, further comprising a pushing member movable relative to the clamping assembly, wherein the first clamping member and the second clamping member each comprise a connected clamping a clamping portion having the clamping point, the pivoting portion being pivoted on the base, the pushing portion having a pushing point, the pushing member being pushable The respective pushing points of the first clamping member and the second clamping member change the clamping assembly from the clamping state to the released state; wherein, in the clamping state and in the direction of the pivoting wire The distance between the pushed point of the first clamping member and the first pivoting point and the distance between the pushed point of the second clamping member and the second pivoting point are greater than a distance between the first pivot point and the second pivot point. The holding device of claim 2, wherein the pivoting portion has a receiving recess, the receiving portion and the receiving recess are located on the same side of the pivoting portion, the first clamping member The pushed portion is located in the receiving recess of the second clamping member, and the pushed portion of the second clamping member is located in the receiving recess of the first clamping member. The clamping device of claim 1, wherein the clamping assembly further comprises two elastic members, the two elastic members being respectively disposed between the first clamping member and the base and the second clamping Between the piece and the base, the first clamping member and the second clamping member are pivotable relative to the base to respectively compress the two elastic members, and the two elastic members can release the elastic potential energy to make the clip The holding component is changed from the released state to the clamped state. A clamping device comprises: a base; a clamping assembly comprising a first clamping member and a second clamping member, the first clamping member pivoting at a pivotal center of a first pivoting point The second clamping member is pivotally centered on the base by a second pivoting point, and the first pivoting point is spaced apart from the second pivoting point, the first clamping a clamping portion, a pushing portion and a pivoting portion respectively connected to the second clamping member, the clamping portion having a clamping point, the pivoting portion being pivoted on the base, the receiving portion The pushing portion has a pushing point, the pushed portion of the first clamping member extends toward the second clamping member, and the pushed portion of the second clamping member extends toward the first clamping member; a pushing member movable relative to the clamping assembly to push the respective pushing points of the first clamping member and the second clamping member; wherein, the first pivot point and the second pivot a distance between the pushed point of the first clamping member and the first pivoting point, and the pushed point of the second clamping member and the second pivoting connection in a direction of a pivotal connection of the contact Between points Total distance greater than the distance between the first pivot pin and the second pivot point. The clamping device of claim 5, wherein the pivoting portion has a receiving recess, the receiving portion and the receiving recess are located on the same side of the pivoting portion, the first clamping member The pushed portion is located in the receiving recess of the second clamping member, and the pushed portion of the second clamping member is located in the receiving recess of the first clamping member. The clamping device of claim 5, wherein the pivoting wire is substantially orthogonal to a first extension line and the first extension line of the first pivoting point through the first clamping member And a second extension line passing through the nip point of the second clamping member and the second pivot point. The clamping device of claim 5, wherein the clamping assembly further comprises two elastic members, the two elastic members are respectively disposed between the first clamping member and the base and the second clamping Between the member and the base, the first clamping member and the second clamping member are pivoted relative to the base to respectively compress the two elastic members, and the two elastic members can release the elastic potential energy and respectively push against The first clamping member and the second clamping member pivot. A clamping device comprising: a base; and a clamping member pivotally pivoted to the base by a pivoting point, the clamping member having a clamping point, the clamping member being opposite to the clamping member The base pivots to have a clamping state adapted to hold an object; wherein the clamping device is movable in a direction of the object; in the clamping state, the clamping point is passed along the objecting direction An extension line passes through the pivot point. A clamping device comprises: a base; a clamping member pivotally pivoted to the base at a pivoting point, the clamping member having a clamping point, the clamping member being opposite to the base The seat is pivoted to have a clamped state adapted to hold an object; and an elastic member is disposed between the clamp and the base; wherein the clamping device is movable in an object direction, and a pivot line passing through the pivot point is substantially orthogonal to the object direction; in the clamping state and in the direction of the pivot line, an extension line passing through the nip point along the object direction The distance between the pivot points is less than 10% of the distance between the pivot point and the center of the elastic member.