CN102175116B - Calipers locked by two screws - Google Patents

Abstract

A caliper locked by two screws, the invention relates to a caliper. To solve the current problem of internal and external calipers, because they cannot be locked after adjustment, the claws of the calipers are easy to loosen during use, and the measurement is inaccurate, which may easily cause the problem of waste products. Scheme 1: the rear ends of the first and second caliper handles are hinged by a pin, and the first and second caliper handles are connected by two screws; scheme 2: the rear ends of the first and second caliper handles are hinged by a pin, and the first and second caliper handles are connected by two screws. The caliper handles are connected by two screws; Scheme 3; the rear ends of the first, second and third caliper handles are hinged by pin shafts, the first and second caliper handles are detachably connected by a screw, and the first, second and third caliper handles are connected by another One screw is detachably connected; plan four; the rear ends of the first, second and third caliper handles are hinged by pin shafts, the first and second caliper handles are detachably connected by one screw, and the first, second and third caliper handles are connected by another screw Detachable connection. The invention is used for detecting the dimensional accuracy of the inner hole or outer circle diameter of a part.

Description

Calipers locked with two screws

technical field

The invention relates to a caliper, in particular to a detection tool for detecting the dimensional accuracy of the inner hole or outer circle diameter of a part.

Background technique

It is convenient, economical and fast to use internal and external calipers to detect the dimensional accuracy of the inner hole or outer diameter of parts in batches. However, the inner and outer calipers currently used cannot be locked after adjustment, and the claws of the calipers are easy to loosen during use, resulting in inaccurate measurement and waste products, and only one dimension of the part can be detected at a time.

The utility model patent with the authorized announcement number CN201277842Y and the authorized announcement date on July 22, 2009 discloses "An Inner Caliper with a Ruler". Since the inner caliper has only two caliper handles, it is impossible to detect parts at the same time The two dimensions of the over end and the end stop of the inner hole or the outer circle.

Contents of the invention

The purpose of the present invention is to provide a caliper that is locked with two screws to solve the problem that the existing inner caliper is only provided with two caliper handles, which cannot simultaneously detect both the over-end and the stop-end of the inner hole or outer circle of the part. A question of size.

The present invention has four technical solutions for solving the problems of the technologies described above, which are respectively:

Option 1: The caliper of the present invention is an inner caliper, and the inner caliper includes a first caliper handle, a second caliper handle and a pin shaft; the inner caliper also includes a connecting plate and two screws; the connecting plate is provided with two Threaded hole; the first caliper handle is made up of a first handle, a first connecting handle and a first caliper claw made into one, the first caliper claw is located at the front end of the first handle, and the first connecting handle is located on one side of the first handle , the first caliper handle is provided with a first connection hole and a second connection hole, and the first connection hole is provided on the first connection handle, and the second connection hole is provided on the first handle; the second caliper handle is made of Composed of the second handle, the second connecting handle and the second caliper claw, the second caliper claw is located at the front end of the second handle, the second connecting handle is located on one side of the second handle, the second connecting handle is an arc-shaped handle, The arc-shaped concave surface of the second connecting handle is arranged towards the rear end of the second handle, and the second caliper handle is provided with an arc-shaped long hole, and the arc-shaped long hole is located on the second connecting handle and the second handle; the first The first caliper claw on the caliper handle and the second caliper claw on the second caliper handle are set opposite to each other, the rear end of the first handle and the rear end of the second handle are hinged by a pin, and one of the two screws passes through The arc-shaped long hole on the handle of the second caliper and the first connecting hole on the handle of the first caliper are screwed to one of the two threaded holes on the connecting plate, and the remaining one of the two screws passes through the second caliper in turn The arc-shaped long hole on the handle and the second connecting hole on the first caliper handle are threadedly connected with the remaining one of the two threaded holes on the connecting plate.

Scheme 2: The caliper of the present invention is an external caliper, and the external caliper includes a first caliper handle, a second caliper handle and a pin shaft; the outer caliper also includes a connecting plate and two screws; the connecting plate is provided with two Threaded hole; the first caliper handle is made up of a first handle, a first connecting handle and a first caliper claw made into one, the first caliper claw is located at the front end of the first handle, and the first connecting handle is located on one side of the first handle , the first caliper handle is provided with a first connection hole and a second connection hole, and the first connection hole is provided on the first connection handle, and the second connection hole is provided on the first handle; the second caliper handle is made of Composed of the second handle, the second connecting handle and the second caliper claw, the second caliper claw is located at the front end of the second handle, the second connecting handle is located on one side of the second handle, the second connecting handle is an arc-shaped handle, The arc-shaped concave surface of the second connecting handle is arranged towards the rear end of the second handle, and the second caliper handle is provided with an arc-shaped long hole, and the arc-shaped long hole is located on the second connecting handle and the second handle; The second caliper claw on the caliper handle is opposite to the first caliper claw on the first caliper handle, and the second caliper claw on the second caliper handle and the first caliper claw on the first caliper handle are both circular arcs with the same shape Shaped caliper claws, the rear end of the first handle and the rear end of the second handle are hinged by a pin, and one of the two screws passes through the arc-shaped long hole on the second caliper handle and the second on the first caliper handle in turn. A connection hole is threadedly connected to one of the two threaded holes on the connection plate, and the remaining one of the two screws passes through the arc-shaped long hole on the second caliper handle and the second connection hole on the first caliper handle in sequence Thread to the remaining one of the two threaded holes on the connecting plate.

Scheme three: the caliper of the present invention is an inner caliper, and the inner caliper includes a first caliper handle, a second caliper handle and a pin shaft; the inner caliper also includes a third caliper handle, a connecting plate and two screws; the connecting plate There are two threaded holes; the first caliper handle is composed of the first handle, the first connecting handle and the first caliper claw, the first caliper claw is located at the front end of the first handle, and the first connecting handle is located at the first On one side of the handle, the first caliper handle is provided with a first connection hole and a second connection hole, and the first connection hole is arranged on the first connection handle, and the second connection hole is arranged on the first handle; the second caliper The handle is composed of a second handle, a second connecting handle and two second caliper claws which are integrated. On the same side of the second handle, two second caliper claws are arranged side by side from front to back. The second connecting handle is located on the second On the other side of the second handle, the second connecting handle is an arc-shaped handle, the arc-shaped concave surface of the second connecting handle is arranged towards the rear end of the second handle, and the second caliper handle is provided with an arc-shaped long hole, and The arc-shaped long hole is located on the second connecting handle and the second handle; the third caliper handle is composed of the third handle and the third caliper claw made into one, the third caliper claw is located at the front end of the third handle, the third handle There is a protrusion on one side, and an arc-shaped limit hole is arranged on the third caliper handle, and the arc-shaped limit hole is located on the third handle and the protrusion; the first caliper claw on the first caliper handle and the first caliper claw The third caliper claws on the three caliper handles are set in the same direction, the first caliper claws on the first caliper handle are set opposite to the two second caliper claws on the second caliper handle, the rear end of the first handle, the second The rear end of the handle and the rear end of the third handle are hinged by a pin shaft, and one of the two screws passes through the arc-shaped long hole on the second caliper handle and the first connecting hole on the first caliper handle in turn. One of the two threaded holes on the connecting plate is threaded, and the remaining one of the two screws passes through the arc-shaped limiting hole on the third caliper handle, the arc-shaped long hole on the second caliper handle, and the second caliper handle. The second connecting hole on the caliper handle is threadedly connected with the remaining one of the two threaded holes on the connecting plate.

Scheme 4: The caliper of the present invention is an external caliper, and the external caliper includes a first caliper handle, a second caliper handle and a pin shaft; the outer caliper also includes a third caliper handle, a connecting plate and two screws; the connecting plate There are two threaded holes; the first caliper handle is composed of the first handle, the first connecting handle and the first caliper claw, the first caliper claw is located at the front end of the first handle, and the first connecting handle is located at the first On one side of the handle, the first caliper handle is provided with a first connection hole and a second connection hole, and the first connection hole is arranged on the first connection handle, and the second connection hole is arranged on the first handle; the second caliper The handle is composed of a second handle, a second connecting handle and a second caliper claw which are integrated. The second caliper claw is located at the front end of the second handle. The second caliper claw is a U-shaped structure. The second connecting handle is located at the On one side, the second connecting handle is an arc-shaped handle, and the arc-shaped concave surface of the second connecting handle is arranged toward the rear end of the second handle. The second caliper handle is provided with an arc-shaped long hole, and the arc-shaped long hole is The hole is located on the second connecting handle and the second handle; the third caliper handle is made up of a third handle and a third caliper claw made into one, the third caliper claw is located at the front end of the third handle, and a side surface of the third handle is provided with There is a protrusion, and the third caliper handle is provided with an arc-shaped limit hole, and the arc-shaped limit hole is located on the third handle and the protrusion; the first caliper claw of the first caliper handle and the first caliper claw of the third caliper handle The three caliper claws are arranged in the same direction from front to back, the first caliper claw of the first caliper handle and the third caliper claw of the third caliper handle are arranged opposite to the second caliper claw of the second caliper handle, and the first caliper claw on the first caliper handle The first caliper claw, the second caliper claw on the second caliper handle and the third caliper claw on the third caliper handle are all arc-shaped caliper claws, the rear end of the first handle, the rear end of the second handle and the third handle The rear end is hinged by a pin shaft, and one of the two screws passes through the arc-shaped long hole on the second caliper handle and the first connecting hole on the first caliper handle and the two threaded holes on the connecting plate in turn. One threaded connection, the remaining one of the two screws passes through the arc-shaped limiting hole on the third caliper handle, the arc-shaped long hole on the second caliper handle and the second connecting hole on the first caliper handle and The remaining one of the two threaded holes on the connecting plate is threaded.

The beneficial effects of the present invention are: after the caliper claws of the inner caliper or the outer caliper of the present invention are adjusted to the size of the inner hole or the diameter of the outer circle of parts for batch inspection, only two screws are needed to lock them, the size is not easy to change, and the measurement is accurate , greatly reducing the scrap rate.

The invention can quickly and accurately detect two dimensions of over-end and stop-end of parts at one time (using three caliper handles), and can also quickly and accurately detect the over-end or stop-end dimensions of parts at one time (using two caliper handles).

When processing a batch of parts, the number of inner hole and outer circle diameters of the parts is limited. Equipped with several internal and external calipers that have adjusted the fixed dimensions of the over-end and stop-end, it can be realized. It is necessary to use an inner caliper with three caliper handles (Scheme 3); if it is necessary to detect the two dimensions of the over-end (minimum limit size) and the stop end (maximum limit size) of the outer circle of the part at the same time, you need to use three calipers An outer caliper with a shank (Scheme 4); if you need to detect the over-end (maximum limit size) or stop-end (minimum limit size) size of the inner hole of the part, you need to use an inner caliper with two caliper handles (Scheme 1) ; If it is necessary to detect the over-end (minimum limit size) or stop-end (maximum limit size) size of the outer circle of the part, it is necessary to use an external caliper with two caliper handles (Scheme 2).

After the product is processed, the operator can use the inner caliper or outer caliper of the present invention to quickly and accurately perform self-inspection on the parts one by one. Before batches of externally processed or self-processed parts are put into storage, inspectors use the inner caliper or outer caliper of the present invention to quickly and accurately detect the parts one by one, which can effectively prevent waste products from flowing into the next process, prevent waste products from entering the warehouse, and improve The precision of parts manufacturing, the quality and speed of machine assembly save a lot of time and manpower and material resources lost in secondary processing, repair, storage and scrapping of parts.

Description of drawings

Fig. 1 is a front view of the overall structure of the present invention (Scheme 1), Fig. 2 is a top view of Fig. 1, Fig. 3 is a front view of the second caliper handle in Fig. 1, and Fig. 4 is a view of the first caliper handle in Fig. 1 Front view, Fig. 5 is the front view of the overall structure of the present invention (Scheme 2), Fig. 6 is the top view of Fig. 5, Fig. 7 is the front view of the second caliper handle in Fig. 5, Fig. 8 is the first caliper handle in Fig. 5 The front view of the caliper handle, Figure 9 is the front view of the overall structure of the present invention (Scheme 3), Figure 10 is the top view of Figure 9, Figure 11 is the front view of the second caliper handle in Figure 9, Figure 12 is the front view of the second caliper handle in Figure 9 Figure 13 is the front view of the third caliper handle in Figure 9, Figure 14 is the front view of the connecting plate, Figure 15 is the A-A sectional view of Figure 14, Figure 16 is the overall structure of the present invention Front view (Scheme 4), Figure 17 is a top view of Figure 16, Figure 18 is a front view of the second caliper handle in Figure 16, Figure 19 is a front view of the first caliper handle in Figure 16, Figure 20 is a front view of Figure 16 Front view of the third caliper handle in .

Detailed ways

Specific Embodiment 1: In conjunction with Fig. 1-Fig. 4, Fig. 14 and Fig. 15, the caliper locked by two screws in this embodiment is an inner caliper, and the inner caliper includes a first caliper handle 1, a second caliper handle 2 and a pin shaft 3; the inner caliper also includes a connecting plate 4 and two screws 5; the connecting plate 4 is provided with two threaded holes 4-1; the first caliper handle 1 is made of an integrated first handle 1- 1. The first connecting handle 1-2 is composed of the first caliper claw 1-3. The first caliper claw 1-3 is located at the front end of the first handle 1-1, and the first connecting handle 1-2 is located at the first handle 1-1. On one side of the first caliper handle 1, a first connecting hole 1-4 and a second connecting hole 1-5 are provided, and the first connecting hole 1-4 is arranged on the first connecting handle 1-2, and the second The connecting hole 1-5 is arranged on the first handle 1-1; the second caliper handle 2 is made up of the second handle 2-1, the second connecting handle 2-2 and the second caliper claw 2-3 which are made into one, the second caliper handle The two caliper claws 2-3 are located at the front end of the second handle 2-1, and the second connecting handle 2-2 is located on one side of the second handle 2-1, and the second connecting handle 2-2 is an arc-shaped handle. The arc-shaped concave surface of the connecting handle 2-2 is arranged toward the rear end of the second handle 2-1, and the second caliper handle 2 is provided with an arc-shaped slot 2-4, and the arc-shaped slot 2-4 is located at the second handle 2-1. On the second connecting handle 2-2 and the second handle 2-1; the first caliper claw 1-3 on the first caliper handle 1 and the second caliper claw 2-3 on the second caliper handle 2 are arranged opposite to each other, the first The rear end of the handle 1-1 and the rear end of the second handle 2-1 are hinged through the pin shaft 3; one of the two screws 5 passes through the arc-shaped slot 2-4 on the second caliper handle 2 and the second The first connecting hole 1-4 on a caliper handle 1 is threadedly connected to one of the two threaded holes 4-1 on the connecting plate 4, and the remaining one of the two screws 5 passes through the holes on the second caliper handle 2 in turn. The arc-shaped long hole 2 - 4 and the second connecting hole 1 - 5 on the first caliper handle 1 are threadedly connected with the remaining one of the two threaded holes 4 - 1 on the connecting plate 4 .

The two caliper claws on the two caliper handles in this embodiment are locked with two screws 5 after the size is adjusted, and the size is not easy to change. Adopting the connecting plate 4 is equivalent to manufacturing two nuts into one, which is easy to manufacture and the nuts are not easy to rotate.

The first caliper handle 1 and the second caliper handle 2 in this embodiment can freely rotate around the pin shaft 3 within a certain range, and the rear end of the first handle 1-1 and the rear end of the second handle 2-1 pass through two The first flat pad 7 is hinged to the pin shaft 3 , and the two screws 5 are screwed to the connecting plate 4 through two second flat pads 8 .

Embodiment 2: In conjunction with FIG. 1 and FIG. 2 , the thickness of the first caliper handle 1 and the thickness of the second caliper handle 2 in this embodiment are respectively 0.5-2 mm. The thickness can be selected according to the needs, and various models of different sizes can be manufactured. Others are the same as in the first embodiment.

Specific embodiment three: In conjunction with Fig. 5-Fig. 8, Fig. 14 and Fig. 15, the caliper locked by two screws in this embodiment is an outer caliper, and the outer caliper includes a first caliper handle 1, a second caliper handle 2 and a pin shaft 3; the outer caliper also includes a connecting plate 4 and two screws 5; the connecting plate 4 is provided with two threaded holes 4-1; the first caliper handle 1 is made of an integrated first handle 1- 1. The first connecting handle 1-2 is composed of the first caliper claw 1-3. The first caliper claw 1-3 is located at the front end of the first handle 1-1, and the first connecting handle 1-2 is located at the first handle 1-1. On one side of the first caliper handle 1, a first connecting hole 1-4 and a second connecting hole 1-5 are provided, and the first connecting hole 1-4 is arranged on the first connecting handle 1-2, and the second The connecting hole 1-5 is arranged on the first handle 1-1; the second caliper handle 2 is made up of the second handle 2-1, the second connecting handle 2-2 and the second caliper claw 2-3 which are made into one, the second caliper handle The two caliper claws 2-3 are located at the front end of the second handle 3-1, and the second connecting handle 2-2 is located on one side of the second handle 2-1, and the second connecting handle 2-2 is an arc-shaped handle. The arc-shaped concave surface of the connecting handle 2-2 is arranged toward the rear end of the second handle 2-1, and the second caliper handle 2 is provided with an arc-shaped slot 2-4, and the arc-shaped slot 2-4 is located at the second handle 2-1. On the second connecting handle 2-2 and the second handle 2-1; the second caliper claw 2-3 on the second caliper handle 2 is set opposite to the first caliper claw 1-3 on the first caliper handle 1, and the second caliper The second caliper claw 2-3 on the handle 2 and the first caliper claw 1-3 on the first caliper handle 1 are arc-shaped caliper claws with the same shape, and the rear end of the first handle 1-1 and the second handle The rear end of 2-1 is hinged by the pin shaft 3, and one of the two screws 5 passes through the arc-shaped long hole 2-4 on the second caliper handle 2 and the first connecting hole 1 on the first caliper handle 1 in sequence -4 is threaded with one of the two threaded holes 4-1 on the connecting plate 4, and the remaining one of the two screws 5 passes through the arc-shaped long hole 2-4 on the second caliper handle 2 and the first The second connecting hole 1 - 5 on the caliper handle 1 is threadedly connected to the remaining one of the two threaded holes 4 - 1 on the connecting plate 4 .

The first caliper handle 1 and the second caliper handle 2 in this embodiment can freely rotate around the pin shaft 3 within a certain range, and the rear end of the first handle 1-1 and the rear end of the second handle 2-1 pass through two The first flat pad 7 is hinged to the pin shaft 3 , and the two screws 5 are screwed to the connecting plate 4 through two second flat pads 8 .

Specific Embodiment 4: Referring to FIG. 5 and FIG. 6 , the thickness of the first caliper handle 1 and the thickness of the second caliper handle 2 in this embodiment are respectively 0.5-2 mm. The thickness can be selected according to the needs, and various models of different sizes can be manufactured. Others are the same as in the third embodiment.

Embodiment 5: In conjunction with Fig. 9-Fig. 15, the caliper locked by two screws in this embodiment is an inner caliper, and the inner caliper includes a first caliper handle 1, a second caliper handle 2 and a pin shaft 3; The inner caliper also includes a third caliper handle 6, a connecting plate 4 and two screws 5; the connecting plate 4 is provided with two threaded holes 4-1; the first caliper handle 1 is made of an integrated first handle 1- 1. The first connecting handle 1-2 is composed of the first caliper claw 1-3. The first caliper claw 1-3 is located at the front end of the first handle 1-1, and the first connecting handle 1-2 is located at the first handle 1-1. On one side of the first caliper handle 1, a first connecting hole 1-4 and a second connecting hole 1-5 are provided, and the first connecting hole 1-4 is arranged on the first connecting handle 1-2, and the second The connecting hole 1-5 is arranged on the first handle 1-1; the second caliper handle 2 is composed of the second handle 2-1, the second connecting handle 2-2 and two second caliper claws 2-3 which are integrated , on the same side of the second handle 2-1, there are two second caliper claws 2-3 juxtaposed from front to back, the second connecting handle 2-2 is located on the other side of the second handle 2-1, the second The connecting handle 2-2 is an arc-shaped handle, and the arc-shaped concave surface of the second connecting handle 2-2 is arranged toward the rear end of the second handle 2-1, and the second caliper handle 2 is provided with an arc-shaped long hole 2- 4, and the arc-shaped long hole 2-4 is located on the second connecting handle 2-2 and the second handle 2-1; the third caliper handle 6 is made of the third handle 6-1 and the third caliper claw 6 which are integrated -2, the third caliper claw 6-2 is located at the front end of the third handle 6-1, a protrusion 6-3 is provided on one side of the third handle 6-1, and a circular arc shape is provided on the third caliper handle 6. The limit hole 6-4, and the arc-shaped limit hole 6-4 is located on the third handle 6-1 and the protrusion 6-3; the first caliper claw 1-3 on the first caliper handle 1 and the third caliper The third caliper claw 6-2 on the handle 6 is arranged in the same direction, and the first caliper claw 1-3 on the first caliper handle 1 and the two second caliper claws 2-3 on the second caliper handle 2 are arranged opposite to each other. , the rear end of the first handle 1-1, the rear end of the second handle 2-1 and the rear end of the third handle 6-1 are hinged by the pin shaft 3, and one of the two screws 5 passes through the second The arc-shaped elongated hole 2-4 on the caliper handle 2 and the first connecting hole 1-4 on the first caliper handle 1 are threadedly connected with one of the two threaded holes 4-1 on the connecting plate 4, and two screws The remaining one of 5 passes through the arc-shaped limiting hole 6-4 on the third caliper handle 6, the arc-shaped long hole 2-4 on the second caliper handle 2 and the second hole on the first caliper handle 1 in turn. The connecting hole 1-5 is threadedly connected with the remaining one of the two threaded holes 4-1 on the connecting plate 4.

The three caliper claws in this embodiment can freely rotate around the pin shaft 3 for adjustment. After the size of the two opposing caliper claws (over-end or end-stop) on the first caliper handle 1 and the second caliper handle 2 is adjusted, a screw 5 is used to lock the connection plate 4. Then adjust the third caliper handle 6 to determine another size (end stop or over end). After adjusting the size, use another screw 5 to lock and fix the three caliper handles together.

The first caliper handle 1, the second caliper handle 2 and the third caliper handle 6 in this embodiment can freely rotate around the pin shaft 3 within a certain range. The rear end of the first handle 1-1, the second handle 2-1 The rear end of the rear end and the rear end of the third handle 6-1 are hinged with the pin shaft 3 through two first flat pads 7, and the two screws 5 are threaded with the connecting plate 4 through two second flat pads 8.

Embodiment 6: In conjunction with FIG. 9 and FIG. 10 , the thickness of the first caliper handle 1 , the thickness of the second caliper handle 2 and the thickness of the third caliper handle 6 in this embodiment are respectively 0.5-2 mm. The thickness can be selected according to the needs, and various models of different sizes can be manufactured. Others are the same as in the fifth embodiment.

Embodiment 7: In conjunction with Fig. 14-Fig. 20, the caliper locked by two screws in this embodiment is an outer caliper, and the outer caliper includes a first caliper handle 1, a second caliper handle 2 and a pin 3; The outer caliper also includes a third caliper handle 6, a connecting plate 4 and two screws 5; the connecting plate 4 is provided with two threaded holes 4-1; the first caliper handle 1 is made of an integrated first handle 1- 1. The first connecting handle 1-2 is composed of the first caliper claw 1-3. The first caliper claw 1-3 is located at the front end of the first handle 1-1, and the first connecting handle 1-2 is located at the first handle 1-1. On one side of the first caliper handle 1, a first connecting hole 1-4 and a second connecting hole 1-5 are provided, and the first connecting hole 1-4 is arranged on the first connecting handle 1-2, and the second The connecting hole 1-5 is arranged on the first handle 1-1; the second caliper handle 2 is made up of the second handle 2-1, the second connecting handle 2-2 and the second caliper claw 2-3 which are made into one, the second caliper handle Two caliper claws 2-3 are located at the front end of the second handle 2-1, the second caliper claw 2-3 is a U-shaped structure, the second connection handle 2-2 is positioned on one side of the second handle 2-1, and the second connection The handle 2-2 is an arc-shaped handle, and the arc-shaped concave surface of the second connecting handle 2-2 is arranged towards the rear end of the second handle 2-1, and the second caliper handle 2 is provided with an arc-shaped long hole 2-4 , and the arc-shaped long hole 2-4 is located on the second connecting handle 2-2 and the second handle 2-1; the third caliper handle 6 is made of the third handle 6-1 and the third caliper claw 6- 2, the third caliper claw 6-2 is located at the front end of the third handle 6-1, a protrusion 6-3 is provided on one side of the third handle 6-1, and an arc-shaped limiter is provided on the third caliper handle 6. The position hole 6-4, and the arc-shaped limit hole 6-4 is located on the third handle 6-1 and the protrusion 6-3; the first caliper claw 1-3 of the first caliper handle 1 and the third caliper handle 6 The third caliper claw 6-2 of the first caliper handle 1 is set in the same direction from front to back, and the first caliper claw 1-3 of the first caliper handle 1 and the third caliper claw 6-2 of the third caliper handle 6 are connected with the second caliper handle 2. The second caliper claw 2-3 is arranged oppositely, the first caliper claw 1-3 on the first caliper handle 1, the second caliper claw 2-3 on the second caliper handle 2 and the third caliper on the third caliper handle 6 The claws 6-2 are arc-shaped caliper claws, the rear end of the first handle 1-1, the rear end of the second handle 2-1 and the rear end of the third handle 6-1 are hinged by the pin 3, and two screws One of 5 passes through the arc-shaped long hole 2-4 on the second caliper handle 2, the first connecting hole 1-4 on the first caliper handle 1 and the two threaded holes 4-1 on the connecting plate 4 in turn. One of the threaded connections, the remaining one of the two screws 5 passes through the arc-shaped limiting hole 6-4 on the third caliper handle 6, the arc-shaped long hole 2-4 on the second caliper handle 2 and The second connecting hole 1 - 5 on the first caliper handle 1 is threadedly connected to the remaining one of the two threaded holes 4 - 1 on the connecting plate 4 .

The first caliper handle 1, the second caliper handle 2 and the third caliper handle 6 in this embodiment can freely rotate around the pin shaft 3 within a certain range. The rear end of the first handle 1-1, the second handle 2-1 The rear end of the rear end and the rear end of the third handle 6-1 are hinged with the pin shaft 3 through two first flat pads 7, and the two screws 5 are threaded with the connecting plate 4 through two second flat pads 8.

Embodiment 8: Referring to FIG. 16 and FIG. 17 , the thicknesses of the first caliper handle 1 , the second caliper handle 2 and the third caliper handle 6 of this embodiment are respectively 0.5-2 mm. The thickness can be selected according to the needs, and various models of different sizes can be manufactured. Others are the same as in the seventh embodiment.

working principle:

When using the third method of the present invention to measure the dimensional accuracy of the diameter of the inner hole of the part, the two caliper claws on the first and second caliper handles of the inner caliper (two caliper claws with the back and the back facing each other) are adjusted to a size ( After over-end or end-stop), use a screw to lock, and then adjust the two caliper claws on the third and second caliper handles (two caliper claws facing back to back) to another size (end-stop or Over-end), use another screw to lock the three caliper handles together, and quickly and accurately detect the two dimensions of the over-end and stop-end of the inner hole of the part at the same time.

When using the fourth method of the present invention to measure the dimensional accuracy of the outer diameter of the part, adjust the two caliper claws on the first and second caliper handles of the outer caliper (the caliper claws facing the two detection ends) to a size (over-end After that, use a screw to lock, and then adjust the two caliper claws on the third and second caliper handles (the caliper claws facing the two detection ends) to another size (stop end or over end), Use another screw to lock the three caliper handles together, and quickly and accurately detect the two dimensions of the over-end and stop-end of the inner hole of the part at the same time.

Solution 1 of the present invention can only quickly and accurately detect one size of the over-end or end-stop of the inner hole of the part at one time.

The second solution of the present invention can only quickly and accurately detect one dimension of the over-end or end-stop of the outer circle of the part.

Claims (4)

1. A caliper locked by two screws, the caliper is an inner caliper, and the inner caliper includes a first caliper handle (1), a second caliper handle (2) and a pin shaft (3); it is characterized in that : The inner caliper also includes a third caliper handle (6), a connecting plate (4) and two screws (5); the connecting plate (4) is provided with two threaded holes (4-1); the first caliper handle (1) It is composed of the first handle (1-1), the first connecting handle (1-2) and the first caliper claw (1-3) which are integrated, and the first caliper claw (1-3) is located on the first The front end of the handle (1-1), the first connecting handle (1-2) is located on one side of the first handle (1-1), and the first caliper handle (1) is provided with a first connecting hole (1-4 ) and the second connecting hole (1-5), and the first connecting hole (1-4) is set on the first connecting handle (1-2), and the second connecting hole (1-5) is set on the first handle ( 1-1); the second caliper handle (2) is composed of a second handle (2-1), a second connecting handle (2-2) and two second caliper claws (2-3), On the same side of the second handle (2-1), there are two second caliper claws (2-3) juxtaposed from front to back, and the second connecting handle (2-2) is located on the side of the second handle (2-1). On the other side, the second connecting handle (2-2) is an arc-shaped handle, and the arc-shaped concave surface of the second connecting handle (2-2) is set toward the rear end of the second handle (2-1), and the second The caliper handle (2) is provided with an arc-shaped long hole (2-4), and the arc-shaped long hole (2-4) is located on the second connecting handle (2-2) and the second handle (2-1) ;The third caliper handle (6) is composed of the third handle (6-1) and the third caliper claw (6-2) which are made into one, and the third caliper claw (6-2) is located on the third handle (6-1 ), a protrusion (6-3) is provided on one side of the third handle (6-1), and an arc-shaped limiting hole (6-4) is provided on the third caliper handle (6), and the circle The arc-shaped limiting hole (6-4) is located on the third handle (6-1) and the protrusion (6-3); the first caliper claw (1-3) on the first caliper handle (1) and the third The third caliper claw (6-2) on the caliper handle (6) is set in the same direction, the first caliper claw (1-3) on the first caliper handle (1) and the two claws on the second caliper handle (2) The second caliper claws (2-3) are set opposite to each other, the rear ends of the first handle (1-1), the rear ends of the second handle (2-1) and the rear ends of the third handle (6-1) are three The latter is hinged by the pin shaft (3), and one of the two screws (5) passes through the arc-shaped long hole (2-4) on the second caliper handle (2) and the hole on the first caliper handle (1) in turn. The first connecting hole (1-4) is screwed to one of the two threaded holes (4-1) on the connecting plate (4), and the remaining one of the two screws (5) passes through the third caliper handle ( 6) The arc-shaped limiting hole (6-4) on the upper part, the arc-shaped long hole (2-4) on the second caliper handle (2) and the second connecting hole ( 1-5) Threaded connection with the remaining one of the two threaded holes (4-1) on the connecting plate (4). 2. The caliper locked by two screws according to claim 1, characterized in that: the thickness of the first caliper handle (1), the thickness of the second caliper handle (2) and the thickness of the third caliper handle (6) The thicknesses are each 0.5 to 2 mm. 3. A caliper locked by two screws, the caliper is an outer caliper, and the outer caliper includes a first caliper handle (1), a second caliper handle (2) and a pin shaft (3); it is characterized in that : The outer caliper also includes a third caliper handle (6), a connecting plate (4) and two screws (5); the connecting plate (4) is provided with two threaded holes (4-1); the first caliper handle (1) It is composed of the first handle (1-1), the first connecting handle (1-2) and the first caliper claw (1-3) which are integrated, and the first caliper claw (1-3) is located on the first The front end of the handle (1-1), the first connecting handle (1-2) is located on one side of the first handle (1-1), and the first caliper handle (1) is provided with a first connecting hole (1-4 ) and the second connecting hole (1-5), and the first connecting hole (1-4) is set on the first connecting handle (1-2), and the second connecting hole (1-5) is set on the first handle ( 1-1); the second caliper handle (2) is composed of the second handle (2-1), the second connecting handle (2-2) and the second caliper claw (2-3) which are made into one, the second The caliper claw (2-3) is located at the front end of the second handle (2-1), the second caliper claw (2-3) is a U-shaped structure, and the second connecting handle (2-2) is located ), the second connection handle (2-2) is an arc-shaped handle, and the arc-shaped concave surface of the second connection handle (2-2) is set toward the rear end of the second handle (2-1). The second caliper handle (2) is provided with an arc-shaped long hole (2-4), and the arc-shaped long hole (2-4) is located on the second connecting handle (2-2) and the second handle (2-1) Above; the third caliper handle (6) is composed of the third handle (6-1) and the third caliper claw (6-2) which are integrated, and the third caliper claw (6-2) is located on the third handle (6- 1) at the front end, a protrusion (6-3) is provided on one side of the third handle (6-1), and an arc-shaped limiting hole (6-4) is provided on the third caliper handle (6), and The arc-shaped limiting hole (6-4) is located on the third handle (6-1) and the protrusion (6-3); the first caliper claw (1-3) and the third caliper claw (1-3) of the first caliper handle (1) The third caliper claw (6-2) of the caliper handle (6) is arranged in the same direction from front to back, and the first caliper claw (1-3) of the first caliper handle (1) and the first caliper claw (1-3) of the third caliper handle (6) The three caliper claws (6-2) are set opposite to the second caliper claw (2-3) of the second caliper handle (2), the first caliper claw (1-3) on the first caliper handle (1), the second The second caliper claw (2-3) on the caliper handle (2) and the third caliper claw (6-2) on the third caliper handle (6) are arc-shaped caliper claws, and the first handle (1-1 ), the rear end of the second handle (2-1) and the rear end of the third handle (6-1) are hinged by the pin shaft (3), and one of the two screws (5) passes through the second The arc-shaped long hole (2-4) on the caliper handle (2), the first connecting hole (1-4) on the first caliper handle (1) and the two threaded holes (4) on the connecting plate (4) -1), the remaining one of the two screws (5) passes through the third caliper handle (6 ), the arc-shaped long hole (2-4) on the second caliper handle (2) and the second connection hole (1) on the first caliper handle (1) -5) Thread the remaining one of the two threaded holes (4-1) on the connecting plate (4). 4. The caliper locked by two screws according to claim 3, characterized in that: the thickness of the first caliper handle (1), the thickness of the second caliper handle (2) and the thickness of the third caliper handle (6) The thicknesses are each 0.5 to 2 mm.

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