CN110806162A - Clamp - Google Patents

Abstract

The invention provides a clamp which comprises a first half clamp, a second half clamp, a first pivot, a second pivot and a driving rod, wherein the first half clamp is arranged on the first side of a clamping rod; the first half clamp comprises a first clamping part and a first connecting part; the second half clamp comprises a second clamping part and a second connecting part, and the first clamping part and the second clamping part are oppositely arranged to form a clamping space; the first half clamp is rotatably connected to the second half clamp, and the clamping space and the second connecting part are respectively positioned at two sides of the first connecting part; the first pivot is arranged on the first half clamp and is rotatably connected with the first half clamp; the second pivot comprises a threaded hole, and the second pivot is arranged on the second half clamp and is rotatably connected with the second half clamp; one end of the driving rod is rotatably connected to the first pivot, the other end of the driving rod penetrates through a threaded hole of the second pivot and extends towards the direction far away from the clamping space, and the driving rod is in threaded fit with the threaded hole.

Description

Clamp

Technical Field

The invention relates to the technical field of clamps in general, in particular to a micrometer gauge support clamp which is small in occupied space of a chuck, is not in the clamping direction of a locking mechanism and is beneficial to operation in a narrow space.

Background

The dial indicator is a precise measuring tool capable of measuring relative displacement, and is widely applied to various precise measurement occasions. In the field of aircraft maintenance, one of the uses of a dial gauge is for measuring axial play of an input or output shaft of a transmission gearbox (hereinafter referred to simply as a "drive shaft").

As shown in fig. 1A, the method for measuring the axial play of the transmission shaft 930 is: the dial indicator 910 and the gear box 940 are fixed together by using a clamp, the position of the dial indicator 910 is adjusted to enable the measuring head to contact the end face of the measured transmission shaft, then axial tension and thrust are successively applied to the transmission shaft, and corresponding axial movement amount is read on the dial indicator.

In the prior art, continuing to refer to FIG. 1A, a C-clip 920 is often used as a fixture for fixing the dial gauge and the gearbox. However, the screw locking assembly 921 of the C-clamp is disposed in the clamping direction (up and down direction as shown), and takes up more space in the clamping direction when the C-clamp 920 is clamped. As shown in fig. 1B, when a narrow clamping space is encountered, the C-shaped clamp is very inconvenient to disassemble and assemble, and even cannot be clamped.

The above information disclosed in this background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not constitute prior art that is already known to a person of ordinary skill in the art.

Disclosure of Invention

It is a primary object of embodiments of the present invention to overcome at least one of the above-mentioned drawbacks of the prior art, and to provide a clamp that occupies a small space in a clamping direction, and a locking mechanism is not in the clamping direction, so that clamping can be performed in a narrow space.

In order to achieve the purpose, the invention adopts the following technical scheme:

according to one aspect of the present invention, there is provided a clamp comprising a first clamp half, a second clamp half, a first pivot, a second pivot, and a drive rod; the first half clamp comprises a first clamping part and a first connecting part; the second half clamp comprises a second clamping part and a second connecting part, and the first clamping part and the second clamping part are oppositely arranged to form a clamping space; the first half clamp is rotatably connected to the second half clamp, and the clamping space and the second connecting part are respectively positioned at two sides of the first connecting part; the first pivot is arranged on the first half clamp and is rotatably connected with the first half clamp; the second pivot comprises a threaded hole, and the second pivot is arranged on the second half clamp and is rotatably connected with the second half clamp; one end of the driving rod is rotatably connected to the first pivot, the other end of the driving rod penetrates through the threaded hole of the second pivot and extends towards the direction far away from the clamping space, and external threads are arranged on the outer surface of the driving rod and are in threaded fit with the threaded hole;

when the driving rod is rotated towards a first direction by taking the axial lead of the driving rod as an axis, a first thread driving force is generated between the driving rod and the second pivot, and the first thread driving force drives the second pivot and the second connecting part to be close to the first connecting part so as to drive the second clamping part to be far away from the first clamping part;

when the driving rod is rotated towards a second direction by taking the axis of the driving rod as an axis, a second thread driving force is generated between the driving rod and the second pivot, and the second thread driving force drives the second pivot and the second connecting part to be away from the first connecting part so as to drive the second clamping part to be close to the first clamping part.

According to an embodiment of the present invention, the first connecting portion includes a first connecting body, and the first pivot is rotatably connected to the first connecting body;

the first pivot comprises a first pivot body, the first pivot body comprises a first hole arranged along the radial direction and a first pin groove arranged along the axial direction, and the first pin groove penetrates through two opposite surfaces of the first pivot body along the axial direction and is communicated with the first hole;

one end of the driving rod is provided with an annular groove, and the end is arranged in the first hole;

the pin shaft is accommodated in the first pin groove in a manner of partially protruding out of the first pin groove; the protruding portion of the pin cooperates with the annular groove to limit axial movement of the drive rod.

According to an embodiment of the present invention, the first pivot further includes two first shaft portions, and the two first shaft portions are respectively disposed on two sides of the first pivot body in the axial direction and are coaxial with the first pivot body; each first shaft part is provided with a first side section, the distance between one side wall of the first shaft part opposite to the first side section and the first side section is a first distance, and the directions of the two first side sections are the same;

the first connecting body comprises two first connecting ribs which are oppositely arranged, each first connecting rib is provided with a first notch corresponding to the first shaft part, the inner wall of each first notch comprises a first arc section and two first plane sections which are oppositely arranged, the two first plane sections are respectively connected to two ends of the first arc section and extend outwards, and the outer wall surface of the first shaft part except the first side section can be in rotating contact with the first arc section;

the distance between the two first plane sections is greater than the first distance and smaller than the diameter of the first circular arc section, so that the first shaft part can transversely penetrate through the first plane sections to enter the first circular arc section; when the first shaft part rotates for an angle relative to the first notch by taking the axis of the first shaft part as an axis, the first side section is not opposite to any first plane section, and the two first plane sections can limit the first shaft part to be separated from the first notch.

According to an embodiment of the present invention, the second connecting portion includes a second connecting body, and the second connecting body is pivotally connected to the second connecting body;

the second pivot comprises a second pivot body, the threaded hole is formed in the second pivot body, the second pivot further comprises two second shaft parts, and the two second shaft parts are respectively arranged on two sides of the second pivot body along the axial direction and are coaxial with the second pivot body; each second shaft part is provided with a second side tangent plane, the distance between one side wall of the second shaft part opposite to the second side tangent plane and the second side tangent plane is a second distance, and the two second side tangent planes are in the same direction;

the second connecting body comprises two second connecting ribs which are oppositely arranged, each second connecting rib is provided with a second notch corresponding to the second shaft part, the inner wall of each second notch comprises a second arc section and two second plane sections which are oppositely arranged, the two second plane sections are respectively connected to two ends of the second arc section and extend outwards, and the outer wall surface of the second shaft part except the second side section can be in rotating contact with the second arc section;

the distance between the two second plane sections is greater than the second distance and smaller than the diameter of the second circular arc section, so that the second shaft part can transversely penetrate through the second plane sections to enter the second circular arc section; when the second shaft part rotates for an angle relative to the second notch by taking the axis of the second shaft part as an axis, the second side section does not face any second plane section, and the two second plane sections can limit the second shaft part to be separated from the second notch.

According to an embodiment of the present invention, the second pivot further includes two second connecting shaft portions respectively connected to the two second shaft portions, the two second connecting shaft portions and the second pivot body are coaxial, and each second connecting shaft portion is provided with a connecting hole arranged along an axial direction;

the clamp further comprises a connecting rod, and one end of the connecting rod is connected to the connecting hole.

According to an embodiment of the present invention, an inner side of a connection portion of the first clamping portion and the first connecting portion transitions in a circular arc structure.

According to an embodiment of the present invention, the clamp further includes a rotating rod, the rotating rod is inserted into one end of the driving rod, which is far away from the first half clamp, and two ends of the rotating rod are respectively provided with an anti-drop ring.

According to an embodiment of the present invention, the second clamping portion and the second connecting portion are arranged at an obtuse angle, the second half clamp further includes a protruding rib, and the protruding rib is arranged at a connection position of the second clamping portion and the second connecting portion;

the first connecting part of the first half clamp comprises two lugs which are oppositely arranged, an avoiding space is formed between the two lugs, and the two lugs are respectively positioned on two sides of the convex rib by virtue of the avoiding space;

the hinge pin sequentially penetrates through one of the lugs, the convex rib and the other lug.

According to an embodiment of the present invention, the inner side of the joint of the second clamping portion and the convex rib is transited in a circular arc structure.

According to an embodiment of the present invention, a first pad is disposed on a side of the first clamping portion facing the second clamping portion, and a second pad is disposed on a side of the second clamping portion facing the first clamping portion.

According to the technical scheme, the clamp has the advantages and positive effects that:

the second connecting part and the clamping space of the second half clamp are designed to be respectively positioned at two sides of the first connecting part of the first half clamp, so that the driving rods respectively connected with the first connecting part and the second connecting part are also positioned at one side far away from the clamping space. Therefore, when the space in the vertical direction is narrow and the space in the front-back direction is large, the driving rod and the clamping space of the clamp are positioned in the front-back direction, so that the first half clamp and the second half clamp can conveniently extend into the narrow space in the clamping process, the operating space of the driving rod positioned at the rear part is large, the driving rod can be conveniently operated, and the clamp can be locked.

Drawings

The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

FIG. 1A shows a schematic view of a prior art C-clamp for measuring axial play of a drive shaft.

Fig. 1B is a schematic view showing that the transmission shaft cannot be clamped when the axial play of the transmission shaft is measured by using a C-shaped clamp in the prior art.

Fig. 2 is a perspective view of a fixture shown in accordance with an exemplary embodiment of the present invention.

Fig. 3 is a perspective view illustrating a first pivot according to an exemplary embodiment of the present invention.

Fig. 4 is a side view of fig. 3.

Fig. 5 is a sectional view taken along line a-a of fig. 4.

Fig. 6 is a side view of a drive rod according to an exemplary embodiment of the present invention.

Fig. 7 is a first perspective view of the second pivot shown in accordance with an exemplary embodiment of the present invention.

Fig. 8 is a second perspective view of the second pivot shown in accordance with an exemplary embodiment of the present invention.

Fig. 9 is a perspective view of a first clip half shown in accordance with an exemplary embodiment of the present invention.

Figure 10 is a perspective view of a second clip half shown in accordance with an exemplary embodiment of the present invention.

FIG. 11 is a partial cross-sectional view of a clip shown in accordance with an exemplary embodiment of the present invention.

Figure 12 is an exploded view of a clamp assembly according to an exemplary embodiment of the present invention.

Fig. 13 to 19 are assembly views illustrating a jig according to an exemplary embodiment of the present invention.

Wherein the reference numerals are as follows:

10. first half clamp

101. Clamping space

110. A first clamping part

111. First protective pad

120. First connecting part

121. First connecting body

122. First connecting rib

1221. First gap

1222. First arc segment

1223. First plane segment

123. Convex lug

124. Avoidance space

125. First pivot

126. First pivot body

1261. First hole

1262. First pin slot

127. First shaft part

1271. First side section

20. Pin shaft

30. Second half clamp

310. Second clamping part

311. Second protective pad

320. Second connecting part

321. Second connecting body

322. Second connecting rib

3221. Second gap

3222. Second arc segment

3223. Second plane section

323. Convex rib

325. Second pivot

326. Second pivot body

3261. Threaded hole

327. Second shaft part

3271. Second side section

328. Second connecting shaft part

3281. Connecting hole

40. Connecting rod

50. Driving rod

510. Annular groove

520. External thread

60. Rotating rod

610. Anti-drop ring

70. Hinge pin

810. Bolt

820. Single-jaw clamp

830. Double-opening clamp

910. Dial gauge

920. C-shaped clamp

930. Transmission shaft

940. Transmission gear box

AB. Up and down direction

CD. Left and right direction

EF. Front-back direction

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.

Although relative terms, such as "upper" and "lower," may be used in this specification to describe one element of an icon relative to another, these terms are used in this specification for convenience only, e.g., in accordance with the orientation of the examples described in the figures. It will be appreciated that if the device of the icon were turned upside down, the element described as "upper" would become the element "lower". The terms "a," "an," "the," and "said" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.; the terms "first," "second," "third," and "fourth," etc. are used merely as labels, and are not limiting as to the number of their objects.

The structure, connection mode and functional relationship of the main components of the clamp provided by the invention are described in detail in the following with reference to the accompanying drawings.

As shown in fig. 2, for convenience of explanation, the direction in which the opening of the jig faces is defined as "front" and indicated by the letter "E"; the direction away from "front" is defined as "rear" and is indicated by the letter "F"; the direction in which the first half-clip is located is defined as "up", indicated by the letter "a"; the direction of departure from "up" is defined as "down", indicated by the letter "B"; "left" and "right" are again defined in terms of the above "front", "back", "upper" and "lower", and are indicated by the letters "C" and "D", respectively.

Continuing to refer to fig. 2 in conjunction with fig. 9 and 10, fig. 2 is a perspective view of a fixture according to an exemplary embodiment of the present invention. Fig. 9 is a perspective view of a first clip half shown in accordance with an exemplary embodiment of the present invention. Figure 10 is a perspective view of a second clip half shown in accordance with an exemplary embodiment of the present invention. In this embodiment, the clamp includes a first clamp half 10, a second clamp half 30, a first pivot 125, a second pivot 325, and an actuation lever 50. The first half clamp 10 includes a first clamping portion 110 and a first connecting portion 120; the second half clamp 30 comprises a second clamping portion 310 and a second connecting portion 320, wherein the first clamping portion 110 and the second clamping portion 310 are arranged oppositely to form a clamping space 101; the first half clamp 10 is rotatably connected to the second half clamp 30, and the clamping space 101 and the second connecting portion 320 are respectively located at both sides of the first connecting portion 120; the first pivot 125 is disposed on the first half clamp 10 and rotatably connected to the first half clamp 10; a second pivot 325 is provided on the second half-clip 30 and rotatably connected to the second half-clip 30, the second pivot 325 including a threaded hole 3261; one end of the driving lever 50 is rotatably connected to the first pivot 125, the other end of the driving lever 50 passes through the threaded hole 3261 of the second pivot 325 and extends in a direction away from the clamping space 101, and the outer surface of the driving lever 50 is provided with external threads 520, see fig. 6, and is in threaded engagement with the threaded hole 3261;

when the driving rod 50 is rotated in the first direction by taking the axial line of the driving rod 50 as an axis, a first thread driving force is generated between the driving rod 50 and the second pivot 325, and the first thread driving force drives the second pivot 325 and the second connecting portion 320 to approach the first connecting portion 120, so as to drive the second clamping portion 310 to be far away from the first clamping portion 110;

when the driving lever 50 is rotated in the second direction by taking the axial line of the driving lever 50 as an axis, a second thread driving force is generated between the driving lever 50 and the second pivot 325, and the second thread driving force drives the second pivot 325 and the second connecting portion 320 to move away from the first connecting portion 120, so as to drive the second clamping portion 310 to approach the first clamping portion 110.

By designing the second connecting portion 320 and the clamping space 101 of the second half clamp 30 to be located at both sides of the first connecting portion 120 of the first half clamp 10, respectively, the driving levers 50 connecting the first connecting portion 120 and the second connecting portion 320, respectively, are also located at a side away from the clamping space 101. Thus, when the space in the vertical direction is narrow and the space in the front-back direction is large, the driving rod 50 and the clamping space 101 of the clamp are located in the front-back direction, so that the first half clamp 10 and the second half clamp 30 can conveniently extend into the narrow space in the clamping process of the clamp, and the operation space of the driving rod 50 located behind is also large, so that the driving rod 50 can be conveniently operated to realize the locking of the clamp.

As shown in fig. 3, 4 and 5, fig. 3 is a perspective view illustrating a first pivot according to an exemplary embodiment of the present invention, fig. 4 is a side view of fig. 3, and fig. 5 is a sectional view taken along line a-a of fig. 4. The first pivot 125 includes a first pivot body 126, the first pivot body 126 includes a first hole 1261 disposed radially and a first pin groove 1262 disposed axially, the first pin groove 1262 extends through two axially opposite surfaces of the first pivot body 126 and communicates with the first hole 1261; the first hole 1261 may or may not extend radially through the first pivot body 126; preferably, the first hole 1261 does not extend radially through the first pivot body 126, so that when the clamp is locked, the end surface of the driving rod 50 abuts against the bottom surface of the first hole 1261, the driving force is directly transmitted from the driving rod 50 to the first pivot, and the pin 20 and the annular groove 510 are not in contact and are not stressed, thereby avoiding excessive wear or deformation damage of the pin 20 and the annular groove 510.

As shown in fig. 5, the first pin groove 1262 is configured to receive a portion of the pin 20 such that the pin 20 partially protrudes from the first pin groove 1262 in a radial direction; the protruding portion of the pin 20 can cooperate with the annular groove 510 to limit the axial movement of the drive rod 50.

With reference to fig. 3, the first pivot 125 further includes two first shaft portions 127, and the two first shaft portions 127 are respectively disposed on two sides of the first pivot body 126 along the axial direction and are coaxial with the first pivot body 126; each first shaft portion 127 has a first side cut surface 1271, a distance between a side wall of the first shaft portion 127 opposite to the first side cut surface 1271 and the first side cut surface 1271 is a first distance, and the two first side cut surfaces 1271 are oriented in the same direction.

In other words, the first side cut surface 1271 cuts a portion of the first shaft portion 127 such that the distance from the first side cut surface 1271 to the other side of the first shaft portion 127 is less than the diameter of the first shaft portion 127.

Fig. 6 is a side view of a drive rod according to an exemplary embodiment of the present invention, as shown in fig. 6. An end of the driving lever 50 is provided with an annular groove 510, and the end is disposed in the first hole 1261 of the first pivot 125.

As shown in fig. 11, fig. 11 is a partial sectional view illustrating a jig according to an exemplary embodiment of the present invention. One end of the driving rod 50 is disposed in the first hole 1261, and the annular groove 510 of the driving rod 50 is engaged with a pin 20 to limit the axial movement of the driving rod 50. In other words, the drive rod 50 is able to rotate about its own axis, but cannot be removed from the first hole 1261.

With continued reference to fig. 6, the exterior surface of the drive rod 50 is provided with external threads 520, the external threads 520 being capable of mating with a threaded bore 3261 described below. When the driving rod 50 is rotated in the first direction by taking the axial line of the driving rod 50 as an axis, the driving rod 50 generates a first thread driving force between the threaded hole 3261 and the second connecting portion 320, and the first thread driving force drives the second connecting portion 320 to approach the first connecting portion 120, so as to drive the second clamping portion 310 to be away from the first clamping portion 110. When the driving rod 50 is rotated in the second direction by taking the axial line of the driving rod 50 as the axis, the driving rod 50 generates a second thread driving force between the threaded hole 3261 and the second connecting portion 320, and the second thread driving force drives the second connecting portion 320 to be away from the first connecting portion 120, so as to drive the second clamping portion 310 to be close to the first clamping portion 110.

As shown in fig. 7 and 8, fig. 7 is a first perspective view of a second pivot shaft shown according to an exemplary embodiment of the present invention, and fig. 8 is a second perspective view of the second pivot shaft shown according to an exemplary embodiment of the present invention.

The second pivot 325 includes a second pivot body 326, the threaded hole 3261 is opened in the second pivot body 326, the second pivot 325 further includes two second shaft portions 327, the two second shaft portions 327 are respectively disposed on two sides of the second pivot body 326 along the axial direction and are coaxial with the second pivot body 326; each second shaft portion 327 has a second side-cut surface 3271, a distance between a side wall of the second shaft portion 327 opposite to the second side-cut surface 3271 and the second side-cut surface 3271 is a second distance, and the two second side-cut surfaces 3271 are oriented in the same direction.

In other words, the second side cut surface 3271 cuts a portion of the second shaft portion 327, such that the distance from the second side cut surface 3271 to the other side of the second shaft portion 327 is smaller than the diameter of the second shaft portion 327.

With reference to fig. 7, the second pivot 325 further includes two second connecting shaft portions 328 respectively connected to the two second shaft portions 327, the two second connecting shaft portions 328 are coaxial with the second pivot body 326, each second connecting shaft portion 328 is provided with a connecting hole 3281 disposed along the axial direction, the connecting hole 3281 is used for connecting a connecting rod 40, and the connecting rod 40 is used for connecting a dial indicator. In some embodiments, the connection hole 3281 may be a threaded hole, and the connection rod 40 is threadedly connected to the connection hole 3281. In other embodiments, the connecting rod 40 and the connecting hole 3281 can be connected by interference fit or other suitable methods.

Of course, the connecting rod 40 of the present invention is not limited to be connected to the second connecting shaft portion 328, and in other embodiments, the connecting rod 40 may be connected to other components of the clamp, such as the first pivot 125, the first half clamp 10, or the second half clamp 30, and the like, which will not be described herein.

As shown in fig. 9, fig. 9 is a perspective view of a first clip half shown in accordance with an exemplary embodiment of the present invention. In this embodiment, the first connecting portion 120 includes a first connecting body 121, the first connecting body 121 includes two first connecting ribs 122 disposed oppositely, each first connecting rib 122 is opened with a first notch 1221 corresponding to the first shaft portion 127, an inner wall of each first notch 1221 includes a first arc segment 1222 and two first plane segments 1223 disposed oppositely, the two first plane segments 1223 are connected to two ends of the first arc segment 1222 and extend outwards, and an outer wall surface of the first shaft portion 127 except for the first side cut surface 1271 can be in rotational contact with the first arc segment 1222. The two first planar segments 1223 are parallel to each other.

The distance between the two first plane sections 1223 is greater than the first distance and smaller than the diameter of the first circular arc section 1222, so that the first shaft portion 127 can transversely penetrate through the first plane sections 1223 into the first circular arc section 1222; when the first shaft portion 127 rotates by an angle relative to the first notch 1221 with the axis of the first shaft portion as the axis, the first side cut surface 1271 does not face any of the first plane sections 1223, and the two first plane sections 1223 can limit the first shaft portion 127 from coming out of the first notch 1221.

In one embodiment, the inner side of the connection between the first clamping portion 110 and the first connecting portion 120 is transited in a circular arc structure. When the clamp is clamped on an object with an arc-shaped appearance, the clamping force and the stability of the clamp and the clamped object can be improved through the design of the arc structure.

With continued reference to fig. 9, the first connecting portion 120 of the first clip half 10 includes two oppositely disposed lugs 123, an avoiding space 124 is formed between the two lugs 123, and the two lugs 123 are respectively located at two sides of a rib 323 of the second clip half 30, which will be described below, by virtue of the avoiding space 124.

As shown in fig. 10, fig. 10 is a perspective view of a second clip half shown in accordance with an exemplary embodiment of the present invention. In this embodiment, the second connecting portion 320 includes a second connecting body 321, the second connecting body 321 includes two second connecting ribs 322 disposed oppositely, each second connecting rib 322 is opened with a second gap 3221 corresponding to the second shaft portion 327, an inner wall of each second gap 3221 includes a second circular arc segment 3222 and two second plane segments 3223 disposed oppositely, the two second plane segments 3223 are respectively connected to two ends of the second circular arc segment 3222 and extend outwards, and an outer wall surface of the second shaft portion 327 except for the second side cut surface 3271 can be in rotational contact with the second circular arc segment 3222. The two second planar segments 3223 are parallel to each other.

Wherein, the distance between the two second planar segments 3223 is greater than the second distance and smaller than the diameter of the second circular arc segment 3222, so that the second shaft portion 327 can transversely penetrate through the second planar segments 3223 and enter the second circular arc segment 3222; when the second shaft portion 327 rotates by an angle with respect to the second gap 3221 by taking the axis thereof as the axis, the second side cut surface 3271 does not face any of the second planar segments 3223, and the two second planar segments 3223 can limit the second shaft portion 327 to fall out of the second gap 3221.

In one embodiment, the second clamping portion 310 and the second connecting portion 320 are disposed at an obtuse angle, and the second half clamp 30 further includes a rib 323, wherein the rib 323 is disposed at a connection position of the second clamping portion 310 and the second connecting portion 320. The inner side of the joint of the second clamping part 310 and the convex rib 323 is transited in a circular arc structure. When the clamp is clamped on an object with an arc-shaped appearance, the clamping force and the stability of the clamp and the clamped object can be improved through the design of the arc structure.

In one embodiment, as shown in fig. 11, the clamp further includes a rotating rod 60, the rotating rod 60 is disposed through an end of the driving rod 50 away from the first half clamp 10, and two ends of the rotating rod 60 are respectively provided with a slip-proof ring 610.

As shown in fig. 11, a first pad 111 is provided on a side of the first half clip 10 facing the second half clip 30, and a second pad 311 is provided on a side of the second half clip 30 facing the first half clip 10.

As shown in fig. 12, fig. 12 is an exploded view of a caliper assembly shown in accordance with an exemplary embodiment of the present invention. The clamp assembly includes a bolt 810, a single-jaw 820, and a double-jaw 830. A single jaw 820 is connected to a double jaw 830 by bolts 810, a first hole 821 on the single jaw 820 is used to connect to the connecting rod 40 of the present invention, a second hole 831 on the double jaw 830 is used to connect to the extension assembly of the dial gauge, and a third hole 832 on the double jaw 830 is used to connect to the body of the dial gauge.

Through adding the clamp assembly, the dial indicator can be flexibly connected to the clamp to adapt to measurement in various positions.

The assembly process of the jig of the present invention will be described in detail with reference to fig. 13 to 19.

As shown in fig. 13, the two lugs 123 of the first half clamp 10 can be respectively positioned at two sides of the rib 323 of the second half clamp 30 by the escape space 124 of the first half clamp 10, and a hinge pin 70 is provided to sequentially pass through one of the lugs 123, the rib 323 and the other lug 123, so that the first half clamp 10 and the second half clamp 30 are hinged.

As shown in fig. 14, a distance between a side wall of the second shaft portion 327 opposite to the second side cut surface 3271 and the second side cut surface 3271 is defined as a second distance, and since the distance between the two second planar segments 3223 is greater than the second distance and smaller than the diameter of the second circular arc segment 3222, the two second side cut surfaces 3271 of the second pivot are inserted into the second notch 3221 in a direction toward the second planar segment 3223 on one side of the second notch 3221.

Then, as shown in fig. 15, the second pivot is rotated by an angle about the axis of the second pivot such that the second side cut surface 3271 does not face any of the second planar segments 3223, so that the two second planar segments 3223 can limit the second shaft portion 327 from coming out of the second notch 3221. Accordingly, the second pivot can rotate in the second gap 3221 without falling out of the second gap 3221.

As shown in fig. 16, the drive lever 50 and the first pivot shaft are next assembled. The end of the driving rod 50 having the annular groove 510 is first inserted into the first hole 1261 of the first pivot, and then a pin 20 is provided and inserted into the first pin groove 1262 of the first pivot, since a part of the pin 20 protrudes out of the first pin groove 1262, so that the pin 20 can be engaged with the annular groove 510 to limit the axial movement of the driving rod 50.

The length of the pin 20 is equal to the axial length of the first pivot body 126, in other words, the two ends of the pin 20 located in the first pin groove 1262 do not protrude from two axial sidewalls of the first pivot body 126.

Next, referring to fig. 17 and 18, the manner of installing the first pivot in the first notch 1221 is the same as the above-described method of installing the second pivot, and will not be described in detail here.

As shown in fig. 19, an end of the driving lever 50 remote from the annular groove 510 is inserted into the threaded hole 3261 of the second pivot shaft, and the driving lever 50 is rotated such that the driving lever 50 passes through the threaded hole 3261 to a suitable length.

Finally, the rotating rod 60 is inserted into an end of the driving rod 50 far away from the annular groove 510, and the anti-slip ring 610 is sleeved on two ends of the rotating rod 60.

In conclusion, the clamp has the advantages and beneficial effects that:

by designing the second connecting portion 320 and the clamping space 101 of the second half clamp 30 to be located at both sides of the first connecting portion 120 of the first half clamp 10, respectively, the driving levers 50 connecting the first connecting portion 120 and the second connecting portion 320, respectively, are also located at a side away from the clamping space 101. In this way, when the space in the up-down direction is narrow and the space in the front-back direction is large, because the driving rod 50 and the clamping space 101 of the clamp of the present invention are located in the front-back direction, the first half clamp 10 and the second half clamp 30 can conveniently extend into the narrow space during the clamping process, and the operation space of the driving rod 50 located at the back is also large, so that the driving rod 50 can be conveniently operated to realize the locking of the clamp.

It is to be noted herein that the clamp shown in the drawings and described in the present specification is only one example employing the principles of the present invention. It will be clearly understood by those skilled in the art that the principles of the present invention are not limited to any of the details or any of the components of the apparatus shown in the drawings or described in the specification.

It is to be understood that the invention is not limited in its application to the details of construction and the arrangement of components set forth in the description. The invention is capable of other embodiments and of being practiced and carried out in various ways. The foregoing variations and modifications fall within the scope of the present invention. It will be understood that the invention disclosed and defined in this specification extends to all alternative combinations of two or more of the individual features mentioned or evident from the text and/or drawings. All of these different combinations constitute alternative aspects of the present invention. The embodiments described in this specification illustrate the best mode known for carrying out the invention and will enable those skilled in the art to utilize the invention.

Claims (10)

1. A clamp, comprising:

a first half clamp comprising a first clamping portion and a first connecting portion;

the second half clamp comprises a second clamping part and a second connecting part, and the first clamping part and the second clamping part are oppositely arranged to form a clamping space; the first half clamp is rotatably connected to the second half clamp, and the clamping space and the second connecting part are respectively positioned at two sides of the first connecting part;

the first pivot is arranged on the first half clamp and is rotatably connected with the first half clamp;

the second pivot comprises a threaded hole, and is arranged on the second half clamp and rotatably connected with the second half clamp; and

one end of the driving rod is rotatably connected to the first pivot, the other end of the driving rod penetrates through the threaded hole of the second pivot and extends towards the direction far away from the clamping space, and external threads are arranged on the outer surface of the driving rod and are in threaded fit with the threaded hole;

when the driving rod is rotated towards a first direction by taking the axial lead of the driving rod as an axis, a first thread driving force is generated between the driving rod and the second pivot, and the first thread driving force drives the second pivot and the second connecting part to be close to the first connecting part so as to drive the second clamping part to be far away from the first clamping part;

when the driving rod is rotated towards a second direction by taking the axis of the driving rod as an axis, a second thread driving force is generated between the driving rod and the second pivot, and the second thread driving force drives the second pivot and the second connecting part to be away from the first connecting part so as to drive the second clamping part to be close to the first clamping part.

2. The clamp of claim 1, wherein the first connection portion includes a first connection body to which the first pivot is pivotally connected;

the first pivot comprises a first pivot body, the first pivot body comprises a first hole arranged along the radial direction and a first pin groove arranged along the axial direction, and the first pin groove penetrates through two opposite surfaces of the first pivot body along the axial direction and is communicated with the first hole;

one end of the driving rod is provided with an annular groove, and the end is arranged in the first hole;

the pin shaft is accommodated in the first pin groove in a manner of partially protruding out of the first pin groove; the protruding portion of the pin cooperates with the annular groove to limit axial movement of the drive rod.

3. The clamp of claim 2, wherein the first pivot further comprises two first shaft portions, the two first shaft portions being disposed on two sides of the first pivot body in the axial direction and coaxial with the first pivot body; each first shaft part is provided with a first side section, the distance between one side wall of the first shaft part opposite to the first side section and the first side section is a first distance, and the directions of the two first side sections are the same;

the first connecting body comprises two first connecting ribs which are oppositely arranged, each first connecting rib is provided with a first notch corresponding to the first shaft part, the inner wall of each first notch comprises a first arc section and two first plane sections which are oppositely arranged, the two first plane sections are respectively connected to two ends of the first arc section and extend outwards, and the outer wall surface of the first shaft part except the first side section can be in rotating contact with the first arc section;

the distance between the two first plane sections is greater than the first distance and smaller than the diameter of the first circular arc section, so that the first shaft part can transversely penetrate through the first plane sections to enter the first circular arc section; when the first shaft part rotates for an angle relative to the first notch by taking the axis of the first shaft part as an axis, the first side section is not opposite to any first plane section, and the two first plane sections can limit the first shaft part to be separated from the first notch.

4. The clamp of claim 1, wherein the second coupling portion includes a second coupling body, the second pivot being coupled to the second coupling body;

the second pivot comprises a second pivot body, the threaded hole is formed in the second pivot body, the second pivot further comprises two second shaft parts, and the two second shaft parts are respectively arranged on two sides of the second pivot body along the axial direction and are coaxial with the second pivot body; each second shaft part is provided with a second side tangent plane, the distance between one side wall of the second shaft part opposite to the second side tangent plane and the second side tangent plane is a second distance, and the two second side tangent planes are in the same direction;

the second connecting body comprises two second connecting ribs which are oppositely arranged, each second connecting rib is provided with a second notch corresponding to the second shaft part, the inner wall of each second notch comprises a second arc section and two second plane sections which are oppositely arranged, the two second plane sections are respectively connected to two ends of the second arc section and extend outwards, and the outer wall surface of the second shaft part except the second side section can be in rotating contact with the second arc section;

the distance between the two second plane sections is greater than the second distance and smaller than the diameter of the second circular arc section, so that the second shaft part can transversely penetrate through the second plane sections to enter the second circular arc section; when the second shaft part rotates for an angle relative to the second notch by taking the axis of the second shaft part as an axis, the second side section does not face any second plane section, and the two second plane sections can limit the second shaft part to be separated from the second notch.

5. The clamp of claim 4, wherein the second pivot further comprises two second connecting shaft portions respectively connected to the two second shaft portions, the two second connecting shaft portions being coaxial with the second pivot body, each second connecting shaft portion being provided with a connecting hole disposed along the axial direction;

the clamp further comprises a connecting rod, and one end of the connecting rod is connected to the connecting hole.

6. The clip of claim 1, wherein the inner side of the junction of the first clamping portion and the first connecting portion transitions in a circular arc configuration.

7. The clamp according to claim 1, further comprising a rotating rod, wherein the rotating rod is inserted into an end of the driving rod away from the first half clamp, and anti-falling rings are respectively disposed at two ends of the rotating rod.

8. The clamp of claim 1, wherein the second clamping portion and the second connecting portion are disposed at an obtuse angle, and the second half clamp further comprises a rib disposed at a junction of the second clamping portion and the second connecting portion;

the first connecting part of the first half clamp comprises two lugs which are oppositely arranged, an avoiding space is formed between the two lugs, and the two lugs are respectively positioned on two sides of the convex rib by virtue of the avoiding space;

the hinge pin sequentially penetrates through one of the lugs, the convex rib and the other lug.

9. The clip of claim 8 wherein the junction of the second clip portion and the rib transitions inwardly in a rounded configuration.

10. The clamp of claim 1, wherein a first pad is disposed on a side of the first clamping portion facing the second clamping portion, and a second pad is disposed on a side of the second clamping portion facing the first clamping portion.

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