CN211477844U - Tensile test fixture with adjustable tensile angle - Google Patents

Abstract

The utility model discloses an anchor clamps for tensile test of tensile angle adjustable belongs to metal material or non-metal material's tensile field. The angle scale clamp comprises a clamp main body, an angle scale and a material clamping part, wherein the detachable angle scale is rotatably arranged on the clamp main body; an angle adjusting mechanism is arranged in the clamp main body and used for adjusting the stretching angle; the angle scale is connected with the material clamping part through a connecting bolt; the material clamping part can clamp a brand new designed plate or bar. The utility model discloses not only can controllable angle carry out tensile test, can also centre gripping panel or rod, have simple structure, reasonable in design, easily make's advantage.

Description

Tensile test fixture with adjustable tensile angle

Technical Field

The utility model belongs to the technical field of metal material or non-metal material's drawing, more specifically say, relate to a tensile anchor clamps for test of tensile angularly adjustable.

Background

Tensile test refers to a test method for measuring material properties under an axial tensile load. The data obtained by the tensile test can be used for determining the elastic limit, the elongation, the elastic modulus, the proportion limit, the area reduction, the tensile strength, the yield point, the yield strength and other tensile property indexes of the material, and the creep data can be obtained by the tensile test carried out at high temperature. The procedure for the metal tensile test can be found in ASTM E-8; the methods for tensile testing of plastics are described in ASTM D-638 Standard, D-2289 Standard (high Strain Rate) and D-882 Standard (thin sheet). The ASTM D-2343 standard specifies tensile test methods suitable for glass fibers; tensile test methods suitable for use with adhesives are specified in the ASTM D-897 standard; the tensile test method for hard rubbers is specified in the ASTM D-412 standard. The main instruments used in tensile testing are tensile testers and tensile clamps.

The tensile clamp is a locking mechanism, and has no fixed mode in structure, and the structure is greatly different according to different samples and test force. The test sample with large test force generally adopts an inclined plane clamping structure, the clamping force is increased along with the increase of the test force, and the shoulder test sample adopts a suspension structure and the like. If the clamps are divided according to the structure, the clamps can be divided into wedge-shaped clamps, butt-clamp clamps, winding clamps, eccentric clamps, lever clamps, shoulder clamps, bolt clamps, 90-degree stripping clamps and the like. The mechanical locking structure mainly comprises: a fastener is a combination of these structures, i.e., thread, screw, nut, bevel, eccentric, lever, etc. Although current stretch clamps are well established, certain deficiencies still exist. For example, when a tensile test is performed, the conventional tensile fixture can only perform single tensile test at a certain angle or at certain angles, so that the test for performing multi-angle tensile test is limited.

For example, chinese patent application No.: CN201811560560.7, application date: 20 days 12 and 2018, the name of the invention is: a test device and a test method for a variable-angle cable-stayed bolt. The test device and the test method for the variable-angle cable-stayed bolt comprise a bolt clamping block, a connecting piece and a connecting plate; the bolt clamping block can be axially symmetrically split into two clamp components; the splicing surfaces of the two clamp assemblies are vertical; when the test bolt works, a screw of the test bolt penetrates through the stepped hole and then is screwed into the nut; the connecting piece comprises a connecting frame and two stretching plates; during testing, the assembly body A is accommodated in the inner cavity of the connecting frame, and the vertical slide rail is embedded with the vertical slide groove; the card is inserted into the card slot. Although the stretching angle can be adjusted by adopting the test device of the application, the stretching device can only stretch according to certain fixed angles and cannot meet the stretching requirement of variable angles in a laboratory; meanwhile, although the application has the bolt clamping blocks for clamping materials, the application can only clamp the rods like bolts and cannot clamp plates.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

Aiming at the defects that the conventional stretching clamp is inconvenient in stretching angle adjustment and cannot meet the stretching requirement of a laboratory for a plurality of samples with variable angles, the utility model provides a stretching test clamp with adjustable stretching angles; the adjusting knob of the rotating angle adjusting mechanism drives the gear inside to rotate, and the angle scale is driven to rotate under the action of meshing of the gear teeth, so that the material clamping part is driven to rotate, the sample is adjusted at different angles in a tensile test, and the whole adjusting process is simple and convenient.

2. Technical scheme

In order to achieve the above purpose, the utility model provides a technical scheme does:

the utility model discloses a tensile test fixture with adjustable stretching angle, which comprises a fixture main body, wherein one end of the fixture main body is provided with a material clamping part, and the fixture main body also comprises an angle adjusting mechanism and an angle scale, and the angle scale can be rotatably arranged on the fixture main body and is connected with the material clamping part; the angle adjusting mechanism is positioned in the clamp main body and comprises an adjusting knob, a locking unit, and a driving gear, a driven gear and an acting gear which are meshed in sequence; the adjusting knob is connected with the driving gear through an angle adjusting rod; the action gear part protrudes out of the clamp main body and is meshed with gear teeth on the angle scale; the locking unit is used for locking the driving gear, the driven gear and the acting gear in an angle mode.

As a further improvement of the present invention, the locking units are located at both sides of the driven gear, and the locking units comprise metal elastic pieces, limiting cavities, fixing springs and limiting protrusions; the limiting cavity and the limiting protrusion are used for limiting the moving range of the metal elastic sheet, one end of the metal elastic sheet extends out of the limiting protrusion and is clamped with the tooth groove of the driven gear, and the other end of the metal elastic sheet is fixedly connected with the inner wall of the limiting cavity through a fixing spring.

As a further improvement of the utility model, the angle scale is rotatably mounted on the clamp main body through an angle scale fixing mechanism; the angle scale fixing mechanism is positioned on the supporting table of the clamp main body; a fixing mechanism cavity is arranged in the angle scale fixing mechanism, and an adjusting groove is arranged at the bottom end of the fixing mechanism cavity; the bottom end of the adjusting groove is fixedly connected with one end of an adjusting spring, and the other end of the adjusting spring is fixedly connected with one end of an adjusting sliding block;

the other end of the adjusting slide block is hinged with the tail ends of the two adjusting rods, and the top ends of the two adjusting rods are hinged with the bottom ends of the two symmetrically arranged chuck slide blocks respectively; the chuck sliding blocks are arranged in guide holes communicated with the outside of the cavity of the fixing mechanism, can move in the horizontal direction of the guide holes, and are connected through return springs;

a chuck rail is arranged on one side of the chuck sliding block facing the return spring, and the chuck rail is arranged along the height direction of the chuck sliding block; a rotating shaft is arranged in the chuck track and can move in the chuck track; the rotating shaft is hinged with one end of a rotating rod, the other end of the rotating rod is hinged on a fixed middle shaft, and the fixed middle shaft is fixedly arranged on the inner wall of the angle scale fixing mechanism;

the fixed middle shaft is provided with a through hole for the pressing rod to pass through, two sides of the bottom end of the pressing rod are provided with bulges, the bulges are hinged with rotating sliding blocks, the rotating rod is provided with a rotating rod track for the rotating sliding blocks to slide, and the rotating rod track is arranged along the length direction of the rotating rod; the lower parts of two sides of the top end of the pressing rod are respectively fixedly connected with one end of a pressing spring, and the other end of the pressing spring is fixedly connected with the inner wall of the clamp main body;

the upper part of the middle part of the top end of the pressing rod is fixedly connected with one end of a connecting spring, the other end of the connecting spring is fixedly connected with a button, and the button extends out of the clamp main body; the clamp body is provided with bulges aligned towards the middle, the bulges are also arranged on the bottom of the button in the circumferential direction, and the bulges are matched with each other to limit the motion range of the button.

As a further improvement of the utility model, the angle scale further comprises a connecting hole, a dial gauge and a central hole; the scale is arranged on the upper surface of the angle scale; the centre bore sets up along the direction of height of angle scale, and the lower extreme and the chuck slider circular slot of centre bore are linked together, the chuck slider can rotate in the chuck slider circular slot, the chuck slider circular slot communicates with the inclined plane guiding hole, centre bore, chuck slider circular slot and inclined plane guiding hole three's central line are on same straight line.

As a further improvement of the utility model, the clamp main body is also provided with angle fixing screw holes and pin holes; the angle fixing screw hole is positioned above the action gear and is matched with the angle fixing bolt for use; the pin hole is located at the other end of the clamp main body and connected with the tensile testing machine through a pin.

As a further improvement of the utility model, the angle scale is connected with the material clamping part through a connecting bolt; the connecting bolt is provided with a top thread, a middle smooth surface and a bottom thread, and a top threaded hole and a bottom threaded hole for connecting the connecting bolt are arranged at corresponding positions of the material clamping part.

As a further improvement of the utility model, material clamping portion front end is provided with material clamping mouth to set up the fixed screw of material, rod clamping screw and panel clamping screw at the front end top, wherein, the rod clamping screw is equipped with two, and two relative settings.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with existing well-known technique, have following beneficial effect:

(1) the utility model discloses a tensile test anchor clamps of tensile angle adjustable, through rotating the adjust knob, drive the driving gear rotation inside the anchor clamps main part, under the intermeshing effect of teeth of a cogwheel, transmit to the effect gear, and then drive the angle scale and rotate, drive material clamping portion rotation promptly, thereby reach the purpose of sample angle adjustment, whole device simple structure, convenient operation, for only can realize specific angle and test now, its range of application is wider, the flexibility is higher;

(2) the utility model discloses a tensile test anchor clamps of tensile angle adjustable, act on driving gear, driven gear and effect gear through the locking unit, avoid before carrying out vertical tensile test, because the sample itself has certain gravity, can make the angle scale take place the emergence of the rotation problem to guarantee the accuracy that the experiment goes on;

(3) the utility model discloses an anchor clamps for tensile test of tensile angle adjustable, carry out certain structural design through angular scale fixed establishment, at reset spring, adjusting spring, adjust the pole, the rotary rod and under the mutually supporting of parts such as press the depression bar, on the one hand when carrying out the installation of angular scale, the chuck slider shrink, thereby the angular scale of being convenient for is installed on angular scale fixed establishment, when needs are dismantled to the angular scale, press the button, under the continuous belt effect of a series of parts, make the chuck slider shrink in the guiding hole, the hindrance of chuck slider promptly lacks, the dismantlement of the angular scale of being convenient for.

(4) The utility model discloses an anchor clamps for tensile test of tensile angle adjustable is through being equipped with the graduation apparatus on the angle scale to be equipped with the angle standard on the relevant position of anchor clamps main part, the user mutually supports through angle standard and graduation apparatus in the use, confirms angle scale pivoted angle, makes the result of carrying out tensile test more accurate.

(5) The utility model discloses an anchor clamps for tensile test of tensile angle adjustable through being equipped with different screws in material clamping portion to and design the position of screw, can realize the drawing to rod or panel, make the application scope of anchor clamps obtain improving.

Drawings

Fig. 1 is a schematic structural view of a tensile test fixture with adjustable tensile angle according to the present invention;

fig. 2 is an exploded view of the tensile test fixture with adjustable tensile angle according to the present invention;

FIG. 3 is a schematic structural view of the main body of the clamp of the present invention;

fig. 4 is a schematic sectional view of the angle adjusting mechanism of the present invention;

fig. 5 is a schematic structural view of the adjusting lever of the present invention;

fig. 6 is a schematic view of a cross-sectional structure of the middle angle scale fixing mechanism of the present invention;

fig. 7 is a schematic top view of the middle angle scale of the present invention;

fig. 8 is a schematic view of a cross-sectional structure of the middle angle scale of the present invention;

fig. 9 is a schematic structural view of the material clamping portion of the present invention;

fig. 10 is a schematic structural view of another view angle of the material clamping portion according to the present invention;

fig. 11 is a perspective structure diagram of the material clamping part of the present invention;

fig. 12 is a schematic structural view of a connecting bolt according to the present invention;

fig. 13 is a schematic view of an assembly structure of a plate sample and the tensile test fixture of the present invention;

fig. 14 is an exploded view of a plate sample and the tensile test jig of the present invention;

FIG. 15 is a schematic structural view of a sample sheet;

fig. 16 is a schematic view of an assembly structure of a bar sample and the tensile test jig of the present invention;

fig. 17 is an exploded view of a bar sample and the tensile test jig of the present invention;

fig. 18 is a schematic structural view of a bar sample.

The reference numerals in the schematic drawings illustrate:

100. a clamp body; 101. a support table; 102. an angle scale fixing mechanism; 103. a gear tooth binding surface; 104. an angle adjusting mechanism; 105. an angle fixing screw hole; 106. adjusting a knob; 107. a pin hole; 108. an angle adjusting rod; 109. a driving gear; 110. a driving gear shaft; 111. a driven gear; 112. a driven gear shaft; 113. a metal spring sheet; 114. a limiting cavity; 115. Fixing the spring; 116. a limiting bulge; 117. an action gear; 118. acting on the gear shaft; 119. a cavity of the adjusting mechanism; 120. An angular reference; 121. a fixed mechanism cavity; 123. an adjustment groove; 124. adjusting the spring; 125. adjusting the sliding block; 126. adjusting a rod; 127. a guide hole; 128. a chuck slide block; 129. a chuck rail; 130. a return spring; 131. rotating the rod; 132. a rotating rod track; 133. rotating the slide block; 134. fixing the middle shaft; 135. a pressing lever; 136. a pressing spring; 137. a connecting spring; 138. a button; 139. an angle fixing bolt;

200. an angle scale; 201. connecting holes; 202. a dial gauge; 203. gear teeth; 204. a central bore; 205. a bevel guide hole; 206. a chuck slider circular slot;

300. a material clamping part; 301. material binding surface; 302. a material clamping opening; 303. a material fixing screw hole; 304. clamping screw holes on the bars; 305. a plate clamping screw hole; 306. a top threaded hole; 307. a bottom threaded hole; 308. clamping the bolt;

400. a plate material; 401. a plate limiting hole; 402. the upper surface of the plate; 403. the lower surface of the plate; 404. a plate fixing bolt;

500. a bar material; 501. a bar limiting groove; 502. the surface of the bar; 503. fixing a bolt by a bar material;

600. a connecting bolt; 601. a top thread; 602. a middle smooth surface; 603. bottom thread.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings and examples.

Example 1

The tensile test fixture with the adjustable stretching angle in the embodiment is combined with fig. 1 and fig. 2, and comprises a fixture main body 100, wherein one end of the fixture main body 100 is connected with a material clamping part 300 for clamping a plate 400 and/or a bar 500, the other end of the fixture main body 100 is provided with a pin hole 107, and the tensile test fixture can be fixed on a tensile testing machine through a pin, so that the tensile test is facilitated.

The main body 100 of the clamp of this embodiment is provided with an angle adjusting mechanism 104 and an angle scale 200, wherein the angle scale 200 is rotatably mounted on the main body 100 and connected with the material clamping part 300; the angle adjusting mechanism 104 is positioned inside the clamp body 100, and the angle adjusting mechanism 104 comprises an adjusting knob 106, a locking unit, and a driving gear 109, a driven gear 111 and an acting gear 117 which are engaged in sequence; referring to fig. 3, 4 and 5, the adjusting knob 106 is fixedly connected to the driving gear 109 through an angle adjusting rod 108, when the adjusting knob 106 is rotated, the driving gear 109 rotates under the action of the angle adjusting rod 108, and the gears rotate in sequence under the action of the meshing of the gear teeth, so that the adjusting knob 106 of the present embodiment is exposed outside the clamp body 100 for the user to adjust and rotate.

It should be noted that the side wall of the angle scale 200 in this embodiment is circumferentially provided with gear teeth 203, and the gear teeth 203 are engaged with the gear teeth of the action gear 117 protruding from the fixture main body 100. In addition, a gear tooth abutting surface 103 is arranged on the fixture main body 100, as shown in fig. 3, the gear tooth abutting surface 103 contacts with the gear teeth 203 on the angle scale 200, so that an angle error caused by the looseness of the angle scale 200 can be effectively avoided.

The anchor clamps for tensile test of this embodiment are through mutually supporting of each gear for the rotation of angle scale 200, this structural design is simple, convenient operation, and for the anchor clamps for tensile test among the prior art, its angular adjustment's scope is wider more, and the flexibility is higher.

The mounting positions of the gears in this embodiment are shown in fig. 4, an adjusting mechanism cavity 119 is provided in the interior of the clamp body 100, the driving gear 109, the driven gear 111 and the acting gear 117 are located in the adjusting mechanism cavity 119, and for the convenience of mounting, the driving gear shaft 110, the driven gear shaft 112 and the acting gear shaft 118 are fixedly mounted on the inner wall of the clamp body 100 in this embodiment.

The locking units of the embodiment are positioned at two sides of the driven gear 111 in the cavity 119 of the adjusting mechanism, and the two locking units are arranged oppositely, and each locking unit comprises a metal elastic sheet 113, a limiting cavity 114, a fixed spring 115 and a limiting protrusion 116; the limiting cavity 114 and the limiting protrusion 116 are used for limiting the moving range of the metal elastic sheet 113, and one end of the metal elastic sheet 113 of the embodiment extends out of the limiting protrusion 116 and is clamped with the tooth socket of the driven gear 111, preferably, the shape of the end of the metal elastic sheet 113 clamped with the tooth socket is the same as the shape of the tooth socket; the other end of the metal spring sheet 113 is fixedly connected with the inner wall of the limit cavity 114 through a fixed spring 115.

It should be noted that in this embodiment, the fixing spring 115 is always in a compressed state, so that the fixing spring 115 always applies an acting force to the metal elastic sheet 113, so that the metal elastic sheet 113 always acts on the driven gear 111, and because the two metal elastic sheets 113 are oppositely disposed and act on the driven gear 111 together, the locking unit can block the driven gear 111 from rotating, that is, the locking unit can lock the driving gear 109, the driven gear 111 and the acting gear 117 at an angle. In addition, the metal spring 113 in this embodiment may be made of stainless steel, copper, iron, or other materials.

It is worth to be noted that when the locking unit locks the gear, the acting force applied to the gear from the outside is small, and when a vertical tensile test is performed, after the angle of the angle scale 200 is adjusted, the acting force applied to the angle scale 200 by the gravity of the sample is transmitted to each gear to form an acting force, and the acting force cannot rotate each gear; however, when the user rotates the adjusting knob 106, the acting force applied is greater than the gravity of the sample itself, so that when the adjusting knob 106 rotates, the driving gear 109 can be driven to rotate, and thus the corresponding gear and the angle scale 200 are driven to rotate, and during the rotation of the driven gear 111, the metal elastic sheet 113 will elastically deform along the rotation direction of the driven gear 111.

The present embodiment is provided with an angle fixing screw hole 105 in the jig main body 100, and with reference to fig. 1 and 2, the angle fixing screw hole 105 of the present embodiment is provided above the action gear 117, and the angle fixing bolt 139 passes through the angle fixing screw hole 105, and causes the lower end surface of the angle fixing bolt 139 to act on the action gear 117, that is, the lower end surface of the angle fixing bolt 139 is in contact with the surface of the action gear 117.

Although the locking unit can lock the gear, it cannot overcome the problem that the gear is rotated by a large test force generated during the tensile test, and therefore, the present embodiment applies an acting force to the acting gear 117 through the angle fixing bolt 139, so as to lock the acting gear 117, thereby facilitating the subsequent tensile test.

It should be noted that the tensile test jig of the present embodiment is mainly used for a tensile test in which the maximum test force is small, such as a tensile test in which the maximum test force is 50N, 100N, 150N, or 200N.

If a larger tensile test is desired, the driving gear 109, the driven gear 111, and the acting gear 117 can be locked by adding a plurality of angle fixing bolts 139; or other locking mechanisms may be used to lock the gears.

Example 2

The tensile test fixture with the adjustable tensile angle in the embodiment is basically the same as the tensile test fixture in embodiment 1, and the difference is that: the angle scale 200 of the present embodiment is rotatably mounted on the fixture main body 100 through the angle scale fixing mechanism 102, and with reference to fig. 2 and 3, the angle scale fixing mechanism 102 of the present embodiment is disposed on the supporting table 101 of the fixture main body 100, the structure of the angle scale fixing mechanism 102 is as shown in fig. 6, a fixing mechanism cavity 121 is disposed in the angle scale fixing mechanism 102, wherein an adjusting groove 123 is disposed at a bottom end of the fixing mechanism cavity 121; the bottom end of the adjusting groove 123 is fixedly connected with one end of an adjusting spring 124, and the other end of the adjusting spring 124 is fixedly connected with one end of an adjusting slider 125;

the other end of the adjusting slider 125 is hinged with the tail ends of two adjusting rods 126, and the top ends of the two adjusting rods 126 are hinged with the bottom ends of two symmetrically arranged chuck sliders 128 respectively; the chuck sliding block 128 is arranged in a guide hole 127 communicating with the outside of the fixing mechanism cavity 121, the chuck sliding block 128 can move in the horizontal direction of the guide hole 127, and the two chuck sliding blocks 128 are connected through a return spring 130;

a chuck rail 129 is provided at a side of the chuck slider 128 facing the return spring 130, the chuck rail 129 being provided in a height direction of the chuck slider 128; a rotating shaft is provided in the chuck rail 129, and the rotating shaft can move in the chuck rail 129; the rotating shaft is hinged with one end of a rotating rod 131, the other end of the rotating rod 131 is hinged on a fixed middle shaft 134, and the fixed middle shaft 134 is fixedly arranged on the inner wall of the angle scale fixing mechanism 102;

in this embodiment, a through hole for the pressing rod 135 to pass through is formed in the fixed middle shaft 134, protrusions are formed on two sides of the bottom end of the pressing rod 135, a rotating slider 133 is hinged to the protrusions, a rotating rod rail 132 for the rotating slider 133 to slide is formed on the rotating rod 131, and the rotating rod rail 132 is arranged along the length direction of the rotating rod 131; the top end of the pressing rod 135 extends circumferentially and is fixedly connected with one end of a pressing spring 136 respectively below two opposite sides, and the other end of the pressing spring 136 is fixedly connected with the inner wall of the clamp body 100;

the upper part of the middle part of the top end of the pressing rod 135 is fixedly connected with one end of a connecting spring 137, the other end of the connecting spring 137 is fixedly connected with a button 138, and the button 138 extends out of the clamp main body 100; the clamp body 100 is provided with a protrusion aligned towards the middle, the bottom of the button 138 is also provided with a protrusion along the circumferential direction, and the protrusion and the button 138 are matched with each other to limit the movement range of the button 138.

In order to cooperate with the angle scale fixing mechanism 102, in the angle scale 200 of this embodiment, as shown in fig. 7 and 8, a central hole 204 is formed in the angle scale 200, the central hole 204 is disposed along the height direction of the angle scale 200, the lower end of the central hole 204 is communicated with a chuck slider circular groove 206, a chuck slider 128 on the angle scale fixing mechanism 102 rotates in the chuck slider circular groove 206, the chuck slider circular groove 206 is communicated with a slope guide hole 205, the diameter of the central hole 204 in this embodiment is smaller than that of the chuck slider circular groove 206, the longitudinal section of the slope guide hole 205 is trapezoidal, and the upper end diameter is smaller, that is, the diameter of the slope guide hole 205 communicated with the chuck slider circular groove 206 is smaller than that of the lower end of the slope guide hole 205, and the upper end diameter of the slope guide hole 205 is smaller than that of the chuck slider circular groove 206. The center hole 204, the chuck slider circular groove 206 and the inclined plane guide hole 205 of the present embodiment are communicated, and the center lines of the three are on the same straight line.

In order to cooperate with the inclined guide hole 205, the main body of the chuck slide block 128 of the embodiment is in a rectangular parallelepiped structure, and the guide hole 127 is also in a rectangular parallelepiped hollow structure, so that the chuck slide block 128 can move in the guide hole 127 conveniently; in addition, a slope is formed on the upper surface of the chuck slider 128 at the end thereof protruding out of the guide hole 127, as shown in fig. 6, so as to be conveniently used in cooperation with the slope guide hole 205, thereby facilitating the installation of the angle scale 200.

When the angle scale 200 of the present embodiment is installed, the process is as follows: firstly, a bevel guide hole 205 of the angle scale 200 passes through the button 138 and is buckled on the outer surface of the angle scale fixing mechanism 102 to continue moving downwards; until the circular slope on the slope guide hole 205 contacts with the slope on the upper half part of the chuck slide block 128, the angle scale 200 is pushed to move downwards; the chuck sliding blocks 128 are extruded by the inner wall of the inclined plane guide hole 205, so that the two symmetrically arranged chuck sliding blocks 128 are close to the middle, and the return spring 130 contracts; the top ends of the two adjusting rods 126 are drawn together towards the middle along with the chuck sliding block 128, so that the included angle between the two adjusting rods 126 is smaller and smaller, the bottom ends of the adjusting rods 126 rotate around the top end of the adjusting sliding block 125 and push the adjusting sliding block 125 downwards, and the adjusting spring 124 is contracted; at the same time, the two rotating rods 131 will also rotate around the fixed central shaft 134 to close, and the bottom ends of the rotating rods 131 will also slide downward in the chuck rail 129; because the two rotating rods 131 are close to each other in a rotating manner, the two rotating sliders 133 also rotate around the protrusions on the two sides of the bottom end of the pressing rod 135, and because the distance between the protrusions on the two sides is not changed, the pressing rod 135 moves downwards in the through hole on the fixed central shaft 134 during the rotating process of the rotating rods 131, so that the pressing spring 136 is compressed, and the connecting spring 137 and the button 138 move downwards at the same time for partial displacement; after the inclined guide hole 205 passes through the chuck slider 128, the chuck slider 128 thereof is reset by the adjusting spring 124, the reset spring 130 and the pressing spring 136, so that the chuck slider 128 is ejected along the guide hole 127 and enters the chuck slider circular groove 206, and the mounting of the angle scale is completed.

When the angle scale 200 of the present embodiment is disassembled, the process is as follows: it is first necessary to press the button 138 to move the button 138 downward to compress the connecting spring 137, and then to continue to press the button 138 to move the pressing rod 135 downward, at which time the pressing spring 136 will also be compressed; meanwhile, the pressing rod 135 moves downwards along the through hole on the fixed central shaft 134, the two rotary sliders 133 rotate, and the distance between the protrusions on the two sides of the bottom end of the pressing rod 135 is not changed, so that the two rotary rods 131 rotate and approach around the fixed central shaft 134; thereby driving the two chuck sliding blocks 128 to move inwards and compress the return spring 130; when the two chuck sliders 128 have been retracted into the guide holes 127, the outer wall of the angle scale fixing mechanism 102 is not obstructed, and the angle scale 200 is removed.

The structural design of the angle scale fixing mechanism 102 in this embodiment can effectively ensure that the angle scale 200 cannot be separated from the angle scale fixing mechanism 102 in the rotating process of the angle scale 200, and the whole device has a practical simple structure and is convenient to operate.

Example 3

The tensile test fixture with the adjustable tensile angle in the embodiment is basically the same as the tensile test fixture in embodiment 2, and the difference is that: with reference to fig. 1 and 7, in the present embodiment, a scale 202 is disposed on the upper surface of the angle scale 200, and meanwhile, an angle reference 120 is disposed at a corresponding position of the fixture body 100, and the scale 202 is used in cooperation with the angle reference 120, so that a user can adjust the angle according to an actual required angle, and can accurately control and adjust the rotation angle of the angle scale 200.

Example 4

The tensile test fixture with the adjustable tensile angle in this embodiment is basically the same as embodiment 3, except that: referring to fig. 2, 8, 10 and 11, the material clamping portion 300 of the present embodiment is connected to the angle scale 200 by a connection bolt 600.

Furthermore, in the present embodiment, a connection hole 201 is disposed on the angle scale 200, an arc-shaped through groove is disposed at the tail end of the material clamping portion 300 for placing the angle scale 200, a top threaded hole 306 is disposed at the upper end of the arc-shaped through groove, a bottom threaded hole 307 is disposed at the lower end of the arc-shaped through groove, and the connection bolt 600 passes through the top threaded hole 306, the connection hole 201 and the bottom threaded hole 307 to connect the angle scale 200 and the material clamping portion 300. The front end of the material clamping part 300 is provided with a material clamping opening 302 for placing a sample.

Preferably, in conjunction with fig. 12, the connecting bolt 600 of the present embodiment is provided with a top thread 601, a middle smooth surface 602 and a bottom thread 603 from top to bottom, and when the connecting bolt 600 connects the angle scale 200 and the material clamping portion 300, the middle smooth surface 602 is located in the connecting hole 201, so that the material clamping portion 300 can rotate around the middle smooth surface 602 on the connecting bolt 600 without friction.

It should be noted that the diameter of the bottom thread 603 is smaller than that of the connection hole 201 in this embodiment, so as to avoid the damage of the bottom thread 603 to the inner wall of the connection hole 201 during the installation process.

With reference to fig. 9, 10 and 11, the material clamping portion 300 of the present embodiment has a material fixing screw hole 303, a bar clamping screw hole 304 and a plate clamping screw hole 305 formed at the top of the front end, wherein the two bar clamping screw holes 304 are disposed oppositely.

The tensile test jig of the present embodiment can hold the plate 400 or the bar 500.

Referring to fig. 13, 14 and 15, when the clamp for a tensile test of the present embodiment is used to clamp a plate 400, the structure of the plate 400 is shown in fig. 15, and the plate 400 includes a plate stopper hole 401, a plate upper surface 402 and a plate lower surface 403.

When the material clamping part 300 clamps the plate 400, firstly, the lower surface 403 of the plate is attached to the material attaching surface 301 of the material clamping opening 302, then the clamping bolt 308 penetrates through the plate clamping screw hole 305 and the plate limiting hole 401, and then the plate 400 is fixedly connected with the whole clamp for the extension test; in order to prevent the plate 400 from moving on the clamping bolt 308, the plate fixing bolt 404 passes through the material fixing screw hole 303, and the lower bottom surface of the plate fixing bolt 404 is brought into contact with the upper surface 402 of the plate, and then the clamping bolt 308 and the plate fixing bolt 404 are simultaneously tightened, and the clamping of the plate 400 is completed. Facilitating the subsequent tensile test.

Referring to fig. 16, 17 and 18, when the clamp for a tensile test of this embodiment clamps a bar 500, the structure of the bar 500 is shown in fig. 18, the bar 500 includes two bar limiting grooves 501 and a bar surface 502, the two bar limiting grooves 501 of this embodiment are provided at one end of the bar 500, and the two bar limiting grooves 501 are disposed opposite to each other.

When the material clamping part 300 clamps the bar 500, firstly, the surface 502 of the bar is contacted with the material attaching surface 301, and the symmetrically arranged bar limiting grooves 501 face the left side and the right side of the material clamping opening 302, that is, as shown in fig. 17, two clamping bolts 308 respectively pass through two bar clamping screw holes 304 and are contacted with the bar limiting grooves 501, so that the bar 500 is connected with the whole clamp for the extension test; in order to prevent the bar 500 from moving up and down between the clamping bolts 308 through the bar limiting groove 501, in this embodiment, the bar fixing bolt 503 passes through the material fixing screw hole 303, so that the lower bottom surface of the bar fixing bolt 503 contacts with the surface 502 of the bar, then the clamping bolt 308 and the bar fixing bolt 503 are simultaneously tightened, and the clamping of the bar 500 is completed.

It is worth to be noted that when the tensile test is performed on the sample, two ends of the sample are required to be clamped, so that the clamping positions of the plate 400 and the bar 500 of the utility model are symmetrically arranged, two clamps for the tensile test are required to be used simultaneously, and the angles adjusted by the two clamps for the tensile test are equivalent and opposite; along with the adjustment of the angle, the tensile testing machine connected with the clamp for the tensile test also moves at the same time until the angle adjustment is finished.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims (7)

1. The utility model provides a tensile test of tensile angularly adjustable anchor clamps, includes anchor clamps main part (100), and the one end of anchor clamps main part (100) is equipped with material clamping part (300), its characterized in that: the angle adjusting mechanism (104) and the angle scale (200) are further included, the angle scale (200) is rotatably arranged on the clamp main body (100) and is connected with the material clamping part (300); the angle adjusting mechanism (104) is positioned in the clamp main body (100), and the angle adjusting mechanism (104) comprises an adjusting knob (106), a locking unit, and a driving gear (109), a driven gear (111) and an acting gear (117) which are meshed in sequence; the adjusting knob (106) is connected with the driving gear (109) through an angle adjusting rod (108); the acting gear (117) partially protrudes out of the clamp main body (100) and is meshed with gear teeth (203) on the angle scale (200); the locking unit is used for locking the driving gear (109), the driven gear (111) and the acting gear (117) in an angle mode.

2. The tensile test jig with the adjustable tensile angle according to claim 1, characterized in that: the locking units are positioned on two sides of the driven gear (111) and comprise metal elastic sheets (113), limiting cavities (114), fixed springs (115) and limiting bulges (116); the limiting cavity (114) and the limiting protrusion (116) are used for limiting the moving range of the metal elastic sheet (113), one end of the metal elastic sheet (113) extends out of the limiting protrusion (116) and is clamped with the tooth groove of the driven gear (111), and the other end of the metal elastic sheet (113) is fixedly connected with the inner wall of the limiting cavity (114) through a fixing spring (115).

3. The tensile test jig with the adjustable tensile angle according to claim 2, characterized in that: the angle scale (200) is rotatably arranged on the clamp main body (100) through an angle scale fixing mechanism (102); the angle scale fixing mechanism (102) is positioned on a supporting table (101) of the clamp main body (100); a fixing mechanism cavity (121) is arranged in the angle scale fixing mechanism (102), and an adjusting groove (123) is arranged at the bottom end of the fixing mechanism cavity (121); the bottom end of the adjusting groove (123) is fixedly connected with one end of an adjusting spring (124), and the other end of the adjusting spring (124) is fixedly connected with one end of an adjusting sliding block (125);

the other end of the adjusting sliding block (125) is hinged with the tail ends of the two adjusting rods (126), and the top ends of the two adjusting rods (126) are hinged with the bottom ends of the two symmetrically arranged chuck sliding blocks (128) respectively; the chuck sliding blocks (128) are arranged in guide holes (127) communicated with the outside of the fixing mechanism cavity (121), the chuck sliding blocks (128) can move in the horizontal direction of the guide holes (127), and the two chuck sliding blocks (128) are connected through a return spring (130);

a chuck rail (129) is arranged on one side of the chuck sliding block (128) facing the return spring (130), and the chuck rail (129) is arranged along the height direction of the chuck sliding block (128); a rotating shaft is arranged in the chuck rail (129), and the rotating shaft can move in the chuck rail (129); the rotating shaft is hinged with one end of a rotating rod (131), the other end of the rotating rod (131) is hinged on a fixed middle shaft (134), and the fixed middle shaft (134) is fixedly arranged on the inner wall of the angle scale fixing mechanism (102);

a through hole for a pressing rod (135) to pass through is formed in the fixed middle shaft (134), protrusions are arranged on two sides of the bottom end of the pressing rod (135), a rotating slider (133) is hinged to the protrusions, a rotating rod track (132) for the rotating slider (133) to slide is formed in the rotating rod (131), and the rotating rod track (132) is arranged along the length direction of the rotating rod (131); the lower parts of two sides of the top end of the pressing rod (135) are respectively fixedly connected with one end of a pressing spring (136), and the other end of the pressing spring (136) is fixedly connected with the inner wall of the clamp main body (100);

the upper part of the middle part of the top end of the pressing rod (135) is fixedly connected with one end of a connecting spring (137), the other end of the connecting spring (137) is fixedly connected with a button (138), and the button (138) extends out of the clamp main body (100); the clamp main body (100) is provided with a protrusion aligned to the middle, the bottom of the button (138) is also provided with a protrusion in the circumferential direction, and the protrusion and the button are matched with each other to limit the movement range of the button (138).

4. The tensile test jig with the adjustable tensile angle according to claim 3, characterized in that: the angle scale (200) further comprises a connecting hole (201), a scale (202) and a central hole (204); the dial gauge (202) is arranged on the upper surface of the angle scale (200); centre bore (204) set up along the direction of height of angle scale (200), and the lower extreme and chuck slider circular slot (206) of centre bore (204) are linked together, chuck slider (128) can rotate in chuck slider circular slot (206), chuck slider circular slot (206) are linked together with inclined plane guiding hole (205), centre bore (204), chuck slider circular slot (206) and inclined plane guiding hole (205) three's central line is on same straight line.

5. The tensile test jig with adjustable tensile angle according to any one of claims 1 to 4, characterized in that: the clamp main body (100) is also provided with an angle fixing screw hole (105) and a pin hole (107); the angle fixing screw hole (105) is positioned above the action gear (117) and is matched with an angle fixing bolt (139) for use; the pin hole (107) is positioned at the other end of the clamp main body (100) and is connected with the tensile testing machine through a pin.

6. The tensile test jig with the adjustable tensile angle according to claim 5, characterized in that: the angle scale (200) is connected with the material clamping part (300) through a connecting bolt (600); the connecting bolt (600) is provided with a top thread (601), a middle smooth surface (602) and a bottom thread (603), and a top threaded hole (306) and a bottom threaded hole (307) for connecting the connecting bolt (600) are formed in corresponding positions of the material clamping part (300).

7. The tensile test jig with the adjustable tensile angle according to claim 6, characterized in that: the front end of the material clamping part (300) is provided with a material clamping opening (302), and the top of the front end is provided with a material fixing screw hole (303), a bar clamping screw hole (304) and a plate clamping screw hole (305), wherein the two bar clamping screw holes (304) are arranged oppositely.

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