Geotechnical test device and bolt structure thereof

Abstract

The utility model relates to the technical field of soil tests, and discloses a soil test device and a bolt structure thereof, and the bolt structure comprises a round head square rod bolt, a transferable tray insertion hole and a force transmission assembly diamond hole; the round-head square-bar bolt comprises a bolt top circular truncated cone, a bolt front sliding bar, a bolt front circular truncated cone, a bolt middle transition and a bolt rear square bar which are located on the same axis. The bolt top circular truncated cone is of a circular truncated cone-shaped structure with the upper end smaller than the lower end; the bolt front sliding rod is connected with the lower end of the bolt top circular truncated cone. Autonomous fixation can be achieved through one-time pressing, automatic popping of the plug pin can be achieved after pressing is conducted again, the loading stretching die and the testing device can be fixed more conveniently, the problem that fixation can only be achieved through screwing in of a screw in the prior art is solved, and meanwhile the safety of the testing device is improved. The rhombic square rod at the rear end of the plug pin structure can effectively fix the soil test device part, and the relative sliding between the rotatable mold carrying disc and the arc-shaped force transmission assembly is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of geotechnical test technical field, especially a kind of geotechnical test device and its latch structure. BACKGROUND

[0002] With the development of science and technology, the soil crack problem in engineering is gradually valued, such as landfill, foundation, slope, dam, slope and embankment. Among them, the essence of core wall crack is shear failure, tensile failure or shear-tensile composite failure after the stress and strain of soil body exceed its tensile strength or shear strength. There are two main causes of core wall tensile failure, one is arch effect, that is, due to the difference between the settlement speed and settlement amount of rockfill body and clay core wall, the rockfill body constrains the core wall, which causes vertical tensile stress in the core wall and horizontal cracking; the second is high hydraulic gradient, that is, due to rapid water storage, the pore water pressure of core wall weak plane increases, which causes tensile stress in the front edge of the weak plane, thereby causing hydraulic splitting. With the generation of soil cracks, the damage problem caused by crack propagation belongs to the problem of fracture. Therefore, it is of great engineering significance and practical value to study the tensile and fracture properties of soil body, and it is necessary to develop a test device that can measure the tensile strength and fracture strength of soil body simultaneously.

[0003] At present, many geotechnical test devices are not firmly fixed with loading tensile mold and test device, or need to be screwed in to complete the fixation, so it is necessary to invent a latch structure that can be repeatedly used, self-fixed by pressing the latch, and released by pressing again, to solve the complex and tedious loading tensile mold fixing process during the test process of geotechnical test device, and reduce the disturbance to soil body. UTILITY MODEL CONTENT

[0004] The technical problem to be solved by the utility model is to provide a geotechnical test device and its latch structure to solve the problem that the existing device can only be fixed by screwing in, simplify the operation process, and can be repeatedly used by self-fixing through one pressing and ejecting the latch through the other pressing.

[0005] To solve the above technical problems, the utility model adopts the technical scheme of:

[0006] A latch structure, comprising a round-head square rod latch, a rotatable disc insertion hole and a force transmission assembly diamond hole.

[0007] The round-head square rod latch comprises a latch top circular table, a latch front sliding rod, a latch front circular table, a latch middle transition and a latch rear square rod located on the same axis.

[0008] The latch top circular table is a circular table structure with a smaller upper end than lower end.

[0009] The front part slide rod is connected with the lower end of the top part of the latch;

[0010] The front part of the latch is connected with the front part of the latch, and the front part of the latch is a circular structure with a larger upper end than a lower end;

[0011] The middle part of the latch is connected with the front part of the latch, and the upper end of the middle part of the latch is circular and the lower end is square;

[0012] The rear part of the latch is connected with the middle part of the latch;

[0013] The transferable disc insert hole includes a disc sliding cavity, a disc extension assembly and a disc sliding block;

[0014] The disc sliding cavity is cross-shaped, including a disc inner side sliding cavity, a disc outer side sliding cavity, a disc left side sliding cavity and a disc right side sliding cavity;

[0015] The disc inner side sliding cavity and the disc outer side sliding cavity are located on the same straight line, and the round head square rod latch is slidingly connected in the disc inner side sliding cavity and the disc outer side sliding cavity;

[0016] The disc left side sliding cavity and the disc right side sliding cavity are on the same annular track arc line;

[0017] The disc extension assembly is provided in the disc left side sliding cavity, the disc right side sliding cavity and the disc inner side sliding cavity;

[0018] The disc sliding block includes a disc left side sliding block and a disc right side sliding block, the disc left side sliding block is connected with the disc extension assembly in the disc left side sliding cavity, the disc right side sliding block is connected with the disc extension assembly in the disc right side sliding cavity, and the disc left side sliding block and the disc right side sliding block are larger on the upper end than on the lower end on the side close to the disc outer side sliding cavity;

[0019] When the force transmission assembly diamond hole is coaxially matched with the disc outer side sliding cavity, a limiting pin hole is formed, and the round head square rod latch is movably inserted into the limiting pin hole.

[0020] Preferably, the disc extension assembly includes a disc spring and a disc guide roller, and the disc spring is located on the outer periphery of the disc guide roller;

[0021] The disc spring includes a disc left side spring, a disc right side spring and a disc inner side spring, and the disc guide roller includes a disc left side guide roller, a disc right side guide roller and a disc inner side guide roller;

[0022] The disc left side spring and the disc left side guide roller are both arranged in the disc left side sliding cavity, and the disc left side spring and the disc left side guide roller are both connected with the disc left side sliding block;

[0023] The disc right side spring and the disc right side guide roller are both arranged in the disc right side sliding cavity, and the disc right side spring and the disc right side guide roller are both connected with the disc right side sliding block;

[0024] The inner side spring of the carrier plate and the inner side guide roller of the carrier plate are arranged in the inner side sliding cavity of the carrier plate.

[0025] Preferably, the upper end diameter of the top circular table of the plug, the lower end diameter of the front circular table of the plug, and the upper end diameter of the middle transition of the plug are consistent; the lower end diameter of the top circular table of the plug, the upper end diameter of the front circular table of the plug, and the side length of the rear square rod of the plug are consistent.

[0026] Preferably, the side of the carrier plate left sliding block and the side of the carrier plate right sliding block close to the outer side sliding cavity of the carrier plate are circular arc concave surfaces, the angle and depth of the circular arc concave surfaces are consistent with the circular arc convex surface of the side of the top circular table of the plug, and the side of the carrier plate left sliding block and the side of the carrier plate right sliding block away from the outer side sliding cavity of the carrier plate are circular planes, respectively connected with the carrier plate expansion assembly located in the carrier plate left sliding cavity and the carrier plate right sliding cavity.

[0027] Preferably, the side length of the rear square rod of the plug, the diameter of the outer side sliding cavity of the carrier plate, and the side length of the force transmission component diamond hole are adapted to each other.

[0028] Preferably, the circular arc convex surface of the middle transition side wall of the plug is consistent with the circular arc concave surface of the carrier plate left sliding block and the carrier plate right sliding block.

[0029] Preferably, the inner side sliding cavity of the carrier plate, the outer side sliding cavity of the carrier plate, the carrier plate left sliding cavity, and the carrier plate right sliding cavity are cylindrical cavities.

[0030] Preferably, the upper end diameter of the front circular table of the plug is greater than the lower end diameter of the top circular table of the plug.

[0031] A soil test device includes a plug structure, further includes an arc-shaped force transmission component, a soil sample stretching clamp, and a rotatable mold carrier plate, the soil sample stretching clamp is combined and installed on the rotatable mold carrier plate.

[0032] The rotatable mold carrier plate is a semicircular pie-shaped structure, the number of the rotatable mold carrier plate insertion holes is set to be multiple, and the multiple rotatable mold carrier plate insertion holes are uniformly distributed on the outer arc surface of the rotatable mold carrier plate.

[0033] The rotatable mold carrier plate is movably connected with the arc-shaped force transmission component, and the rotatable mold carrier plate and the arc-shaped force transmission component are locked by the round head square rod plug.

[0034] Preferably, the arc-shaped force transmission component includes a force transmission component arc body and a force transmission component arm, the force transmission component arm is integrally arranged at the end of the force transmission component arc body, and the force transmission component diamond hole is located on the force transmission component arc body.

[0035] The outer side of the rotatable mold carrier plate is embedded in the force transmission component arc body, the outer side of the rotatable mold carrier plate is embedded with a rotatable mold carrier plate rotating ball, and the rotatable mold carrier plate and the force transmission component arc body are rotatably connected through the rotatable mold carrier plate rotating ball.

[0036] The turnable mold loading plate is provided with a turnable loading plate groove, and the turnable loading plate groove is provided with a turnable loading plate groove hole, and a fixing screw is arranged in the turnable loading plate groove hole;

[0037] The outer periphery of the soil sample tensile clamp is provided with a tensile clamp lug, and the tensile clamp lug is provided with a tensile clamp hole, and the soil sample tensile clamp is internally provided with a soil sample;

[0038] The turnable loading plate groove is matched with the tensile clamp lug, and the soil sample tensile clamp is detachably connected with the turnable mold loading plate through the fixing screw.

[0039] The utility model has the advantages of the following beneficial effects:

[0040] The utility model discloses a bolt structure on a geotechnical test device, which can realize independent fixing through one-time pressing, and can realize automatic ejection of the bolt after re-pressing. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 It is the distribution structure explosion map of the bolt structure on the geotechnical test device provided by the utility model.

[0042] Figure 2 It is the distribution state top view of the bolt structure on the geotechnical test device provided by the utility model.

[0043] Figure 3 It is the structure schematic view of the turnable loading plate jack hole in the utility model.

[0044] Figure 4 It is the structure schematic view of the round head square rod bolt in the utility model.

[0045] Figure 5 It is the state demonstration drawing of the round head square rod bolt in the utility model, and the round table of the bolt front part slides upwards.

[0046] Figure 6 It is the state demonstration drawing of the geotechnical test device and the bolt structure fixing and ejection of the utility model.

[0047] Among them:

[0048] 1. Arc-shaped force transmission assembly; 11. Force transmission assembly arc body; 12. Force transmission assembly force arm; 13. Force transmission assembly diamond hole;

[0049] 2. Soil sample tensile clamp; 21. Tensile clamp lug; 22. Tensile clamp hole; 23. Soil sample;

[0050] 3. Rotatable mold carrier; 31. Rotatable transfer tray groove;

[0051] 32. Transferable tray insertion hole; 321. Carrier tray cavity; 3211. Inner cavity of carrier tray; 3212. Outer cavity of carrier tray; 3213. Left side cavity of carrier tray; 3214. Right side cavity of carrier tray;

[0052] 322. Carrier telescopic assembly; 3221. Left side spring of carrier; 3222. Right side spring of carrier; 3223. Inner side spring of carrier; 3224. Left side guide roller of carrier; 3225. Right side guide roller of carrier; 3226. Inner side guide roller of carrier;

[0053] 323. Carrier slider; 3231. Left slider of carrier; 3232. Right slider of carrier;

[0054] 33. Transferable tray slot; 34. Transferable tray rotating ball; 35. Fixing screw;

[0055] 4. Round-headed square-bar pin; 41. Top frustum of the pin; 42. Front slide bar of the pin; 43. Front frustum of the pin; 44. Middle transition of the pin; 45. Rear square bar of the pin. Detailed Implementation

[0056] The present invention will now be described in further detail with reference to the accompanying drawings and specific preferred embodiments.

[0057] like Figure 1 and Figure 2 As shown, a pin structure includes an arc-shaped force transmission component 1, a soil sample stretching clamp 2, a rotatable mold carrier plate 3, and a round-headed square rod pin 4.

[0058] The arc-shaped force transmission component 1 includes a force transmission component arc body 11, a force transmission component lever arm 12, and a force transmission component diamond hole 13.

[0059] The force transmission component arc body 11 is an arc-shaped shell structure with a lever arm. It has an arc-shaped tubular pipe inside and an arc-shaped square structure on the outside, and is slidably connected to the rotatable mold carrier plate 3. It is used to transmit the force of the loading system to the rotatable mold carrier plate 3, and then to the soil sample tension fixture 2.

[0060] The force transmission component lever arm 12 is a square lever arm with a transverse through opening, one end of which is connected to the force transmission component arc body 11. The loading system includes a force application device, and the component lever arm 12 has an opening on it, and the force application device is connected to it.

[0061] The rhombic hole 13 of the force transmission assembly is located on the outer circular arc side of the arc body 11 of the force transmission assembly, and is a gap formed by a plurality of rhombic openings stacked on each other, penetrating the side wall of the arc body 11 of the force transmission assembly. The round square plug pin 4 can be inserted into any one of the rhombic openings of the rhombic hole 13 of the force transmission assembly, and the diameter of each rhombic opening matches the outer circumference of the square rod part of the round square plug pin 4.

[0062] The outer periphery of the soil sample tensile clamp 2 is provided with a tensile clamp lug 21, which is square. The tensile clamp lug 21 is provided with a tensile clamp ear hole 22. The soil sample tensile clamp 2 is internally provided with a soil sample 23.

[0063] The rotatable mold carrier disc 3 is a semicircular pie-shaped structure, including a rotatable carrier disc groove body 31, a rotatable carrier disc insertion hole 32 and a rotatable carrier disc rotating ball 34.

[0064] The rotatable carrier disc groove body 31 is a square groove located on the inside of the semicircular arc of the rotatable mold carrier disc 3. The rotatable carrier disc groove body 31 is provided with a rotatable carrier disc groove hole 33. The shape of the rotatable carrier disc groove body 31 matches the shape of the tensile clamp lug 21, and the detachable connection between the rotatable mold carrier disc 3 and the soil sample tensile clamp 2 can be achieved by fixing the screw 35 through the tensile clamp ear hole 22 and the rotatable carrier disc groove hole 33.

[0065] The rotatable carrier disc insertion hole 32 is a kind of insertion hole with a rhombic opening. There are multiple insertion holes, which are uniformly distributed on the outside of the semicircular arc of the rotatable mold carrier disc 3, and the opening is outward.

[0066] The rotatable carrier disc rotating ball 34 is a circular ball body, which can rotate inside the outside of the semicircular arc of the rotatable mold carrier disc 3. The part exposed to the rotatable mold carrier disc 3 can roll inside the arc body 11 of the force transmission assembly. The diameter of the ball body matches the inner diameter of the pipeline inside the arc body 11 of the force transmission assembly. The outside of the semicircular arc of the rotatable mold carrier disc 3 is connected with the arc-shaped force transmission assembly 1 through the rotatable carrier disc rotating ball 34. The rotatable mold carrier disc 3 is used for tensile test of the soil sample tensile clamp 2.

[0067] The round square plug pin 4 can be inserted into the rhombic insertion hole of the rotatable carrier disc insertion hole 32. The diameter of the rhombic insertion hole of the rotatable carrier disc insertion hole 32 matches the outer circumference of the square rod part of the round square plug pin 4. The round square plug pin 4 can fix the rotatable carrier disc insertion hole 32 and the rhombic hole 13 of the force transmission assembly, so that they are relatively static.

[0068] As shown in Figures 3 to 6 A soil test device and its plug pin structure, including a round square plug pin 4, a rotatable carrier disc insertion hole 32 and a rhombic hole 13 of the force transmission assembly.

[0069] The round square plug pin 4 is an S21800 alloy rod with one end round and the other end square, including a plug pin top circular table 41, a plug pin front sliding rod 42, a plug pin front circular table 43, a plug pin middle transition 44 and a plug pin rear square rod 45 on the same axis.

[0070] The top of the latch 41 is a circular truncated cone structure with the upper end smaller than the lower end.

[0071] The front of the latch 42 is a cylindrical rod connected to the lower end of the top of the latch 41.

[0072] As shown in Figure 5 , Figure 5 (a) shows the front of the latch 43 in the lower end of the front of the latch 42; Figure 5 (b) shows the front of the latch 43 in the upper end of the front of the latch 42;

[0073] Specifically, the front of the latch 43 is a circular truncated cone structure with the upper end larger than the lower end. When the front of the latch 43 slides to the uppermost end of the front of the latch 42, the upper end of the front of the latch 43 is in contact with the lower end of the top of the latch 41. When the front of the latch 43 slides to the lowermost end of the front of the latch 42, the lower end of the front of the latch 43 is in contact with the upper end of the middle of the latch 44.

[0074] The middle of the latch 44 is connected to the front of the latch 42, and the upper end of the middle of the latch 44 is circular and the lower end is square.

[0075] The rear of the latch 45 is a square rod connected to the middle of the latch 44, and its side length is adapted to the hole 32 of the turntable, which can easily insert and pop out the hole 32 of the turntable. Preferably, the upper end diameter of the top of the latch 41, the lower end diameter of the front of the latch 43 and the upper end diameter of the middle of the latch 44 are consistent, and the lower end diameter of the top of the latch 41, the upper end diameter of the front of the latch 43 and the side length of the rear of the latch 45 are consistent. Or the upper end diameter of the front of the latch 43 is greater than the lower end diameter of the top of the latch 41.

[0076] The hole 32 of the turntable includes a slide cavity 321, a telescopic assembly 322 and a slide block 323.

[0077] The slide cavity 321 is cross-shaped, including an inner slide cavity 3211, an outer slide cavity 3212, a left slide cavity 3213 and a right slide cavity 3214.

[0078] The inner slide cavity 3211 and the outer slide cavity 3212 are on the same circular track arc line, which is a cylindrical cavity pipeline, and the square rod latch 4 is slidingly connected in the inner slide cavity 3211 and the outer slide cavity 3212; the outer slide cavity 3212 is the first channel encountered by the square rod latch 4 when it enters the interior of the hole 32 of the turntable, and the inner slide cavity 3211 is the channel entered by the square rod latch 4 later.

[0079] The left slide cavity 3213 and the right slide cavity 3214 of the carrier disc are located on the same straight line; and are cylindrical cavity pipelines.

[0080] The carrier disc telescopic assembly 322 is arranged in the left slide cavity 3213, the right slide cavity 3214 and the inner slide cavity 3211 of the carrier disc.

[0081] The carrier disc slide block 323 includes a left slide block 3231 and a right slide block 3232, the left slide block 3231 is connected with the carrier disc telescopic assembly 322 in the left slide cavity 3213, the right slide block 3232 is connected with the carrier disc telescopic assembly 322 in the right slide cavity 3214, and the left slide block 3231 and the right slide block 3232 are larger on the upper end than on the lower end of the side close to the outer slide cavity 3212; preferably, the left slide block 3231 and the right slide block 3232 are both cylindrical slide blocks, the side close to the outer slide cavity 3212 of the left slide block 3231 and the right slide block 3232 is a circular arc concave surface, the angle and depth of the circular arc concave surface are consistent with the circular arc convex surface of the side of the top circular truncated cone 41 of the pin, and the side away from the outer slide cavity 3212 of the left slide block 3231 and the right slide block 3232 is a circular plane, and is connected with the carrier disc telescopic assembly 322 in the left slide cavity 3213 and the right slide cavity 3214 respectively.

[0082] The force transmission assembly diamond hole 13 is on the same annular track arc line as the outer slide cavity 3212 of the carrier disc, and the round head square rod pin 4 is slidably connected in the force transmission assembly diamond hole 13.

[0083] Preferably, the carrier disc telescopic assembly 322 is a carrier disc spring and a carrier disc guide roller, the carrier disc spring is located outside the periphery of the carrier disc guide roller; the carrier disc spring includes a left spring 3221, a right spring 3222 and an inner spring 3223; and the carrier disc guide roller includes a left guide roller 3224, a right guide roller 3225 and an inner guide roller 3226. The carrier disc guide roller is a telescopic rod member, is located inside the center of the carrier disc spring, and is used for ensuring that the compression and elongation of the carrier disc spring are on the same straight line; after the carrier disc spring is contracted, the carrier disc guide roller can be ejected and restored to the original state. The left spring 3221 and the left guide roller 3224 are arranged in the left slide cavity 3213, and are connected with the left slide block 3231; the right spring 3222 and the right guide roller 3225 are arranged in the right slide cavity 3214, and are connected with the right slide block 3232; and the inner spring 3223 and the inner guide roller 3226 are arranged in the inner slide cavity 3211.

[0084] The usage process of the pin structure provided by this utility model is as follows: Figure 6 As shown, where Figure 6 (a) to Figure 6 (e) is a schematic diagram showing the round-headed square rod pin 4 being inserted into the transfer tray socket 32 ​​and automatically fixed in place. Figure 6 (f) to Figure 6 (l) Schematic diagram showing how the round-headed square-rod pin 4 pops out of the transfer tray insertion hole 32 after being pressed. Specifically:

[0085] Figure 6 (a) shows a schematic diagram of the round-headed square rod pin about to be inserted into the transfer tray socket;

[0086] Figure 6 (b) shows that Figure 6 (a) Based on the above, a schematic diagram of the state in which the round-headed square rod pin enters the outer sliding cavity of the carrier plate;

[0087] Figure 6 (c) shows that Figure 6 (b) Based on this, a schematic diagram showing the state in which the top frustum of the pin contacts the left slider and the right slider of the carrier plate, and pushes them apart to the left and right.

[0088] Figure 6 (d) shows that in Figure 6 (c) Based on this, the top truncated cone of the pin passes over the left slider and the right slider of the carrier disk and contacts the inner spring of the carrier disk;

[0089] Figure 6 (e) shows that in Figure 6 (d) Based on this, the left slider and right slider of the carrier plate spring back to their original positions, and the round-headed square rod pin is automatically fixed.

[0090] Figure 6 (f) shows that in Figure 6 (e) Based on this, continue to press the bottom of the round-headed square rod pin, the inner spring of the carrier plate is further compressed, the front truncated pin contacts the left slider and the right slider of the carrier plate, and pushes the two open to the left and right as shown in the diagram.

[0091] Figure 6 (g) shows that in Figure 6 (f) Based on this, continue to press the bottom of the round-headed square rod pin. The front truncated pin passes over the left slider and the right slider of the carrier plate. The left slider and the right slider of the carrier plate are in the state of springing back.

[0092] Figure 6 (h) shows that in Figure 6 (g) Based on this, stop pressing the bottom of the round-headed square rod pin. The left slider and right slider of the carrier plate further rebound and make transitional contact with the middle of the pin.

[0093] Figure 6 (i) shows the state of the round head square bar plug-in pin being pushed outwards by the rebound recovery of the inner side spring of the carrier plate, the carrier plate left slider and the carrier plate right slider sliding towards the left and right sides with the front round table of the plug-in pin pushing the top round table of the plug-in pin apart, based on Figure 6 (h) shows the state of the round head square bar plug-in pin being pushed outwards by the rebound recovery of the inner side spring of the carrier plate, the carrier plate left slider and the carrier plate right slider sliding towards the left and right sides with the front round table of the plug-in pin pushing the top round table of the plug-in pin apart, based on

[0094] Figure 6 (j) shows the state of the round head square bar plug-in pin being pushed outwards by the rebound recovery of the inner side spring of the carrier plate, the carrier plate left slider and the carrier plate right slider sliding towards the left and right sides with the front round table of the plug-in pin pushing the top round table of the plug-in pin apart, based on Figure 6 (i)

[0095] Figure 6 (k) shows the state of the round head square bar plug-in pin being pushed outwards by the rebound recovery of the inner side spring of the carrier plate, the carrier plate left slider and the carrier plate right slider sliding towards the left and right sides with the front round table of the plug-in pin pushing the top round table of the plug-in pin apart, based on Figure 6 (j)

[0096] Figure 6 (l) shows the state of the round head square bar plug-in pin being pushed outwards by the rebound recovery of the inner side spring of the carrier plate, the carrier plate left slider and the carrier plate right slider sliding towards the left and right sides with the front round table of the plug-in pin pushing the top round table of the plug-in pin apart, based on Figure 6 (k)

[0097] The round head square bar plug-in pin 4 is inserted into the rotatable carrier plate insertion hole 32 and is self-fixed, including the following steps:

[0098] As shown in Figure 6 (a) shows that when the rotatable carrier plate insertion hole 32 and the force transmission component diamond hole 13 are relatively fixed in position, the round head square bar plug-in pin 4 is inserted into the rotatable carrier plate insertion hole 32.

[0099] As shown in Figure 6 (b) shows that the inward force on the round head square bar plug-in pin 4 is continued to be applied, and the round head square bar plug-in pin 4 enters the carrier plate outer side sliding cavity 3212.

[0100] As shown in Figure 6 (c) shows that the inward force on the round head square bar plug-in pin 4 is continued to be applied, and the top round table 41 of the round head square bar plug-in pin 4 contacts the carrier plate left slider 3231 and the carrier plate right slider 3232, and gradually pushes the carrier plate left slider 3231 and the carrier plate right slider 3232 apart to the left and right, and respectively compresses the carrier plate left spring 3221, the carrier plate left guide roller 3224 and the carrier plate right guide roller 3225, the carrier plate right spring 3222 to the left and right, with the entry of the round head square bar plug-in pin 4.

[0101] As shown in Figure 6(d) As shown, continue to apply inward force to the round square rod plug 4, the plug top round table 41 at the top of the round square rod plug 4 passes and separates from the left side slider 3231 and the right side slider 3232 of the carrier disc, the plug top round table 41 contacts the inner side guide roller 3226 and the inner side spring 3223 of the carrier disc, and compresses them inwardly. At this time, the left side slider 3231 and the right side slider 3232 of the carrier disc begin to recover under the action of the left side spring 3221 and the right side spring 3222 of the carrier disc, and the distance between the left side slider 3231 and the right side slider 3232 below the plug top round table 41 is greater than the distance between the left side slider 3231 and the right side slider 3232.

[0102] As shown in Figure 6 (e) As shown, stop applying inward force to the round square rod plug 4, the inner side guide roller 3226 and the inner side spring 3223 of the carrier disc begin to recover and apply outward force to the round square rod plug 4, at this time, the left side slider 3231 and the right side slider 3232 of the carrier disc recover to the initial state, the plug top round table 41 is clamped above the left side slider 3231 and the right side slider 3232 of the carrier disc, and the round square rod plug 4 is self-fixed.

[0103] The round square rod plug 4 is pressed and ejected from the carrier disc insertion hole 32, including the following steps:

[0104] As shown in Figure 6 (f) As shown, again apply inward force to the round square rod plug 4, the round square rod plug 4 moves to the inner side, and further compresses the inner side guide roller 3226 and the inner side spring 3223 of the carrier disc, the plug front round table 43 contacts the left side slider 3231 and the right side slider 3232 of the carrier disc, gradually pushes the left side slider 3231 and the right side slider 3232 of the carrier disc to the left and right, and compresses the left side spring 3221, the left side guide roller 3224 and the right side guide roller 3225, and the right side spring 3222 of the carrier disc to the left and right.

[0105] As shown in Figure 6 (g) As shown, continue to apply inward force to the round square rod plug 4, the round square rod plug 4 moves to the inner side, and further compresses the inner side guide roller 3226 and the inner side spring 3223 of the carrier disc, the plug front round table 43 passes through the left side slider 3231 and the right side slider 3232 of the carrier disc, and the left side slider 3231 and the right side slider 3232 begin to recover.

[0106] As shown in Figure 6(h) as shown, stop applying inward force to the round head square bar bolt 4, the round head square bar bolt 4 stops moving, the carrier disc inner side guide roller 3226 and the carrier disc inner side spring 3223 start to recover and apply outward force to the round head square bar bolt 4, at this time, the carrier disc left side slider 3231 and the carrier disc right side slider 3232 continue to recover and contact the bolt middle part transition 44.

[0107] As Figure 6 (i) as shown, the carrier disc inner side guide roller 3226 and the carrier disc inner side spring 3223 continue to recover and continuously apply outward force to the round head square bar bolt 4, the carrier disc left side slider 3231 and the carrier disc right side slider 3232 recover to the initial state and drive the bolt front part round table 43 to the top of the bolt front part slide rod 42 to contact the bolt top part round table 41, and the upper end of the bolt front part round table 43 is in close contact with the lower end of the bolt top part round table 41.

[0108] As Figure 6 (j) as shown, the carrier disc inner side guide roller 3226 and the carrier disc inner side spring 3223 continue to recover and continuously apply outward force to the round head square bar bolt 4, the bolt front part round table 43 gradually pushes the carrier disc left side slider 3231 and the carrier disc right side slider 3232 to the left and right, and compresses the carrier disc left side spring 3221, the carrier disc left side guide roller 3224, the carrier disc right side guide roller 3225 and the carrier disc right side spring 3222 to the left and right, at this time, the carrier disc left side slider 3231 and the carrier disc right side slider 3232 slide from the side with smaller diameter to the side with larger diameter of the bolt front part round table 43.

[0109] As Figure 6 (k) as shown, the carrier disc inner side guide roller 3226 and the carrier disc inner side spring 3223 recover to the initial state, after sliding through the side with larger diameter of the bolt front part round table 43, the carrier disc left side slider 3231 and the carrier disc right side slider 3232 slide along the side with smaller diameter of the bolt top part round table 41, at this time, the carrier disc left side slider 3231 and the carrier disc right side slider 3232 recover due to the smaller diameter of the bolt top part round table 41, and the round head square bar bolt 4 is applied with outward force by the extrusion of the carrier disc left side slider 3231 and the carrier disc right side slider 3232.

[0110] As Figure 6 Figure 6 Figure 6 Figure 6 Figure 6 Figure 6 Figure 6 Figure 6 Figure 6 Figure 6 Figure 6 Figure 6 Figure 6 Figure 6 Figure 6 Figure 6 Figure 6 Figure 6 Figure 6 Figure 6 Figure 6 Figure 6 Figure 6 Figure 6 Figure 6 Figure 6 Figure 6 Figure 6 (l) as shown, the carrier disc left side slider 3231 and the carrier disc right side slider 3232 recover to the initial state, and the round head square bar bolt 4 is completely ejected.

[0111] The preferred embodiments of the present application are described in detail above, but the present application is not limited to the specific details in the above embodiments, and various equivalent transformations can be made to the technical solutions of the present application within the technical concept of the present application, and these equivalent transformations all belong to the protection scope of the present application.

Claims

1. A latch structure, characterized by: The circular head square rod bolt (4), the rotatable disc insertion hole (32) and the force transmission assembly lozenge hole (13) are included. The circular head square rod bolt (4) includes a bolt top circular table (41), a bolt front sliding rod (42), a bolt front circular table (43), a bolt middle transition (44) and a bolt rear square rod (45) on the same axis. The bolt top circular table (41) is a circular table structure with a smaller upper end and a larger lower end. The bolt front sliding rod (42) is connected with the lower end of the bolt top circular table (41). The bolt front circular table (43) is slidingly connected on the bolt front sliding rod (42), and the bolt front circular table (43) is a circular table structure with a larger upper end and a smaller lower end. The bolt middle transition (44) is connected with the bolt front sliding rod (42), and the upper end of the bolt middle transition (44) is circular and the lower end is square. The bolt rear square rod (45) is connected with the bolt middle transition (44). The rotatable disc insertion hole (32) includes a disc sliding cavity (321), a disc telescopic assembly (322) and a disc sliding block (323). The disc sliding cavity (321) is cross-shaped and includes a disc inner side sliding cavity (3211), a disc outer side sliding cavity (3212), a disc left side sliding cavity (3213) and a disc right side sliding cavity (3214). The disc inner side sliding cavity (3211) and the disc outer side sliding cavity (3212) are located on the same straight line, and the circular head square rod bolt (4) is slidingly connected in the disc inner side sliding cavity (3211) and the disc outer side sliding cavity (3212). The disc left side sliding cavity (3213) and the disc right side sliding cavity (3214) are on the same annular track arc line. The disc telescopic assembly (322) is arranged in the disc left side sliding cavity (3213), the disc right side sliding cavity (3214) and the disc inner side sliding cavity (3211). The disc sliding block (323) includes a disc left side sliding block (3231) and a disc right side sliding block (3232), the disc left side sliding block (3231) is connected with the disc telescopic assembly (322) in the disc left side sliding cavity (3213), the disc right side sliding block (3232) is connected with the disc telescopic assembly (322) in the disc right side sliding cavity (3214), and the disc left side sliding block (3231) and the disc right side sliding block (3232) are larger at the upper end than at the lower end on one side near the disc outer side sliding cavity (3212). The force transmission assembly lozenge hole (13) forms a limit pin hole when coaxially matched with the disc outer side sliding cavity (3212), and the circular head square rod bolt (4) is movably inserted into the limit pin hole.

2. The latch structure according to claim 1, characterized by: The disc telescopic assembly (322) includes a disc spring and a disc guide roller, and the disc spring is located outside the disc guide roller. The disc spring includes a disc left side spring (3221), a disc right side spring (3222) and a disc inner side spring (3223), and the disc guide roller includes a disc left side guide roller (3224), a disc right side guide roller (3225) and a disc inner side guide roller (3226). The disc left side spring (3221) and the disc left side guide roller (3224) are arranged in the disc left side sliding cavity (3213), and the disc left side spring (3221) and the disc left side guide roller (3224) are connected with the disc left side sliding block (3231). The right-side spring (3222) and the right-side guide roller (3225) of the carrier plate are arranged in the right-side sliding cavity (3214) of the carrier plate, and the right-side spring (3222) and the right-side guide roller (3225) of the carrier plate are connected with the right-side sliding block (3232) of the carrier plate. The inner-side spring (3223) and the inner-side guide roller (3226) of the carrier plate are arranged in the inner-side sliding cavity (3211) of the carrier plate.

3. The latch structure according to claim 1, characterized by: The upper end diameter of the top circular table (41) of the plug, the lower end diameter of the front circular table (43) of the plug and the upper end diameter of the middle transition (44) of the plug are consistent, and the lower end diameter of the top circular table (41) of the plug, the upper end diameter of the front circular table (43) of the plug and the side length of the rear square rod (45) of the plug are consistent.

4. The latch structure according to claim 3, characterized in that: The side, away from the outer-side sliding cavity (3212) of the carrier plate, of the left-side sliding block (3231) and the right-side sliding block (3232) of the carrier plate is a circular plane, and is connected with the telescopic assembly (322) arranged in the left-side sliding cavity (3213) and the right-side sliding cavity (3214) of the carrier plate, respectively.

5. The latch structure according to claim 1, characterized by: The side length of the rear square rod (45) of the plug, the diameter of the outer-side sliding cavity (3212) of the carrier plate and the side length of the rhombic hole (13) of the force transmission assembly are adapted to each other.

6. The latch structure according to claim 3, wherein: The circular-arc convex surface of the side wall of the middle transition (44) of the plug is consistent with the circular-arc concave surface of the left-side sliding block (3231) and the right-side sliding block (3232) of the carrier plate.

7. The latch structure according to claim 1, wherein: The inner-side sliding cavity (3211), the outer-side sliding cavity (3212), the left-side sliding cavity (3213) and the right-side sliding cavity (3214) of the carrier plate are all cylindrical cavities.

8. The latch structure according to claim 1, characterized by: The upper end diameter of the front circular table (43) of the plug is greater than the lower end diameter of the top circular table (41) of the plug.

9. A geotechnical testing device comprising the pin structure of any one of claims 1-8, characterized by: The arc-shaped force transmission assembly (1), the soil sample stretching clamp (2) and the rotatable mold carrier plate (3) are further included, and the soil sample stretching clamp (2) is combined and installed on the rotatable mold carrier plate (3); The rotatable mold carrier plate (3) is a semicircular pie-shaped structure, the number of the rotatable mold carrier plate insertion holes (32) is multiple, and the multiple rotatable mold carrier plate insertion holes (32) are uniformly distributed on the outer arc surface of the rotatable mold carrier plate (3); The rotatable mold carrier plate (3) is movably connected with the arc-shaped force transmission assembly (1), and the rotatable mold carrier plate (3) and the arc-shaped force transmission assembly (1) are locked through the round-head square rod plug (4).

10. The geotechnical testing device of claim 9, wherein: The arc-shaped force transmission assembly (1) includes the force transmission assembly arc body (11) and the force transmission assembly force arm (12), the force transmission assembly force arm (12) is integrally arranged at the end of the force transmission assembly arc body (11), and the rhombic hole (13) is located on the force transmission assembly arc body (11); The outer side of the rotatable mold carrier plate (3) is embedded in the force transmission assembly arc body (11), the outer side of the rotatable mold carrier plate (3) is embedded with the rotatable mold carrier plate rotating ball (34), and the rotatable mold carrier plate (3) and the force transmission assembly arc body (11) are rotatably connected through the rotatable mold carrier plate rotating ball (34). The rotatable mold loading plate (3) is provided with a rotatable loading plate groove (31), and the rotatable loading plate groove (31) is provided with a rotatable loading plate groove hole (33) and a fixing screw (35) arranged therein. The soil sample stretching clamp (2) is provided with a stretching clamp lug (21) on the outer periphery, and the stretching clamp lug (21) is provided with a stretching clamp lug hole (22); and the soil sample stretching clamp (2) is provided with a soil sample (23). The rotatable loading plate groove (31) is matched with the stretching clamp lug (21), and the soil sample stretching clamp (2) is detachably connected with the rotatable mold loading plate (3) through the fixing screw (35).

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