Oral cavity material mechanics experiment pressure head

Abstract

The invention belongs to the technical field of oral cavity material detection, and particularly relates to an oral cavity material mechanics experiment pressure head which comprises a main body and a pressure head contact piece, a movable plate is slidably connected in the main body, and an elastic energy storage connecting piece and a locking telescopic rod are arranged below the movable plate; the elastic energy storage connecting piece and the bottom end of the locking telescopic rod are connected with the pressure head contact piece, a pressure adjusting mechanism and a thread transmission mechanism are installed in the main body, and a dynamic impact simulation mechanism is arranged on the movable plate. Through cooperation of multiple stages of gear sets, the pressing speed and stroke of the thread transmission mechanism are changed, and the beating frequency of a cam in the dynamic impact simulation mechanism is synchronously influenced through the rotating speed of a main shaft, so that matched adjustment of pressure and impact parameters is achieved, and dynamic force can be applied to simulate instantaneous impact when teeth crunch hard objects. Simulation requirements of different chewing forces are met, and meanwhile, a static force can be applied to simulate a long-time clenching state of teeth during chewing.

Description

Technical Field

[0001] The invention belongs to the technical field of oral material testing, and in particular relates to an indenter for a mechanical test of oral materials. Background Art

[0002] In dental material mechanics experiments, it is necessary to simulate the stress state of teeth in scenarios such as chewing and biting hard objects in order to test key properties of the material, such as compressive strength and impact toughness. Existing indenters for dental material mechanics experiments have the following shortcomings: 1. Most of them use a single transmission ratio structure, which makes it difficult to accurately control the pressure and speed, and cannot simulate the differences in chewing strength; 2. Traditional indenters mostly apply pressure statically or at a constant speed, making it difficult to replicate the instantaneous impact of teeth biting through hard objects. This results in a significant deviation between experimental data and actual usage scenarios. 3. Functional modules such as pressure application, impact simulation, and initial force setting work independently and cannot accurately simulate the combined force process of "pre-pressure and instantaneous impact". Summary of the Invention

[0003] In order to solve the above problems, the present invention provides an oral material mechanics experimental pressure head, which, through the cooperation of a multi-stage gear set, not only changes the downward speed and stroke of the threaded transmission mechanism, but also synchronously affects the beating frequency of the cam in the dynamic impact simulation mechanism through the spindle speed, so as to achieve the matching adjustment of the "pressure, impact" parameters. It can apply dynamic force to simulate the instantaneous impact when the teeth bite hard objects, meet the simulation requirements of different chewing forces, and also apply static force to simulate the state of teeth clenched for a long time when chewing.

[0004] In order to achieve the above functions, the technical solution adopted by the present invention is as follows: an oral material mechanics experimental pressure head, including a main body and a pressure head contact piece, the pressure head contact piece is movable and located at the bottom of the main body, a movable plate is slidably connected in the main body, an elastic energy storage connector and a locking telescopic rod are arranged under the movable plate, the elastic energy storage connector and the locking telescopic rod are arranged in multiple groups, the bottom ends of the elastic energy storage connector and the locking telescopic rod are connected to the pressure head contact piece, a pressure regulating mechanism and a threaded transmission mechanism are installed in the main body, the threaded transmission mechanism is transmission-connected to the pressure regulating mechanism, the threaded transmission mechanism is transmission-connected to the movable plate, a dynamic impact simulation mechanism is arranged on the movable plate, the dynamic impact simulation mechanism is transmission-connected to the pressure regulating mechanism, the dynamic The dynamic impact simulation mechanism is connected to the pressure head contact piece in a transmission manner; the pressure adjustment mechanism includes a driving motor, a main shaft, a transmission shaft, an adjusting gear group and a transmission gear group. The driving motor is fixedly installed under the inner top wall of the main body, the main shaft is installed under the output end of the driving motor, the bottom end of the main shaft is connected with a transmission ring, the transmission shaft is rotatably arranged under the inner top wall of the main body, the adjusting gear group is slidably arranged on the main shaft, the transmission gear group is arranged on the transmission shaft, and the transmission gear group is coordinated with the adjusting gear group. By utilizing different gear combinations of multi-stage switchable adjusting gear groups and transmission gear groups, the transmission ratio of the gear group can be adjusted to control the rotation speed and downward pressure stroke of the threaded transmission mechanism, thereby accurately controlling the pressure and speed applied by the pressure head contact piece under the moving plate.

[0005] As a preferred technical solution of the present invention, the adjusting gear set includes a driving pinion, a driving gear and an active middle gear, and the driving pinion, driving gear and active middle gear are connected in sequence from top to bottom, and the driving pinion, driving gear and active middle gear are all slidably sleeved on the main shaft, and the transmission gear set includes a driven gear, a driven pinion and a driven middle gear, and the driven gear, driven pinion and driven middle gear are all fixedly sleeved on the transmission shaft, the driven gear is matched with the driving pinion, the driven pinion is matched with the driving gear, and the driven middle gear is matched with the driving middle gear.

[0006] As a preferred technical solution of the present invention, the pressure regulating mechanism also includes a crank, a connecting rod and a splint. The rotating shaft of the crank rotates and passes through the side wall of the main body. One end of the connecting rod is connected to the rotating shaft of the crank, and the splint is hinged to the other end of the connecting rod. The splint is cooperated with the active large gear. The active large gear is rotatable and located in the interlayer of the splint. The rotation of the connecting rod is controlled by rotating the crank, and the connecting rod drives the splint to move. The splint drives the active large gear and the active small gear and active middle gear located on the upper and lower sides thereof to slide and adjust on the main shaft, so that the corresponding gears in the adjusting gear group are engaged with the corresponding gears in the transmission gear group, such as the active small gear is engaged with the driven large gear, the active large gear is engaged with the driven small gear, or the active middle gear is engaged with the driven middle gear.

[0007] As a preferred technical solution of the present invention, the threaded transmission mechanism includes a nut sleeve and a screw, the nut sleeve is fixedly connected to the bottom side of the transmission ring, the screw and the nut sleeve are threadedly adapted, the screw can be passed through the transmission ring and the transmission shaft in a contactless manner, the bottom end of the screw is fixedly connected to the movable plate, the transmission shaft drives the nut sleeve to rotate through the transmission ring, and under the action of the threaded transmission, the screw converts the rotational motion into vertical motion of the movable plate.

[0008] As a preferred technical solution of the present invention, the dynamic impact simulation mechanism includes a telescopic shaft, a bevel gear set and a cam, a through hole is provided on the movable plate, two groups of through holes are provided, a fixed block is fixedly provided on the movable plate, two groups of fixed blocks are relatively provided, and a rotating shaft is rotatably provided on the opposite side walls of the two groups of fixed blocks, the telescopic shaft is telescopically provided in the main shaft, the bevel gear set includes bevel gear 1, bevel gear 2 and bevel gear 3, the bevel gear 1 is rotatably provided on the movable plate, the rotating shaft of the bevel gear 1 is fixedly connected to the bottom end of the telescopic shaft, the bevel gear 2 and the bevel gear 3 are fixedly provided, and the bevel gear 3 is fixedly provided on the movable plate. Gear three is respectively connected to the ends of the two groups of rotating shafts, and the bevel gear two and bevel gear three are both meshed with bevel gear one. The cams are provided in two groups and are fixedly sleeved on the two groups of rotating shafts respectively. The cams are arranged in cooperation with the through holes. The rotation of the main shaft drives the bevel gear one to rotate through the telescopic shaft, and the bevel gear one drives the bevel gear two and bevel gear three to rotate. The bevel gear two and bevel gear three drive the cam on the rotating shaft to rotate. The cam will slap the pressure head contact piece through the through hole, thereby transmitting the pressure to the pressure head contact piece. The pressure head installed on the pressure head contact piece simulates the instantaneous impact when the teeth bite hard objects.

[0009] As a preferred technical solution of the present invention, the elastic energy storage connector includes a threaded rod, an adjusting nut and a spring. The top end of the threaded rod is fixedly installed under the movable plate. The adjusting nut is threadedly adapted to be fitted on the threaded rod. The spring is connected between the pressure head contact piece and the adjusting nut. The spring is sleeved outside the threaded rod. Rotating the adjusting nut can change the pre-compression amount of the spring to achieve the setting of the initial impact force.

[0010] As a preferred technical solution of the present invention, the main shaft is provided with a vertical sliding limit track that slides with the adjusting gear set to limit the active small gear, active large gear and active middle gear of the adjusting gear set to slide only in the vertical direction on the main shaft. A vertical groove is provided on the inner side of the main shaft to cooperate with the telescopic shaft, and the telescopic shaft can be rotated normally by the main shaft while telescoping.

[0011] As a preferred technical solution of the present invention, a locking rod is provided on the locking telescopic rod. When it is necessary to simulate the state of teeth clenching for a long time during chewing, when the pressure head contact piece is at the farthest distance from the movable plate, the locking rod is pressed toward the inside of the locking telescopic rod, so that the output end of the locking telescopic rod cannot be retracted into the base portion of the locking telescopic rod, thereby fixing the distance between the pressure head contact piece and the movable plate.

[0012] Compared with the prior art, the present invention adopts the above structure to achieve the following beneficial effects: 1. Through the cooperation of the multi-stage switchable adjustment gear set and the transmission gear set, the transmission ratio can be flexibly switched, thereby accurately controlling the rotation speed of the threaded transmission mechanism and the downward stroke of the movable plate, and realizing the precise adjustment of the "size and speed" of the pressure applied by the pressure head contact piece to meet the simulation requirements of different chewing forces; 2. The dynamic impact simulation mechanism drives the telescopic shaft, bevel gear set, and cam to rotate through the main shaft. The cam periodically taps the pressure head contact through the through hole of the movable plate. This can accurately reproduce the instantaneous impact force when teeth bite hard objects, filling the gap of traditional static pressure tests and making the experimental data closer to actual usage scenarios. 3. The elastic energy storage connector can change the spring pre-compression by rotating the adjustment nut and set the initial impact force. In conjunction with the instantaneous slapping of the dynamic impact simulation mechanism, it can simulate the composite force process of "pre-pressure and instantaneous impact". For example, the teeth first touch the food lightly, then instantly bite it to pieces, and then lock the telescopic rod so that it can no longer telescope due to force. The distance between the pressure head contact piece and the moving plate no longer changes, and static force can be applied to simulate the state of teeth clenching for a long time during chewing, thereby improving the comprehensiveness of the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A cross-sectional view of an indenter for a dental material mechanics test proposed by the present invention Figure 1 ; Figure 2 A cross-sectional view of an indenter for a dental material mechanics test proposed by the present invention Figure 2 ; Figure 3 A cross-sectional view of an indenter for a dental material mechanics test proposed by the present invention Figure 3 ; Figure 4 This is a schematic diagram of the structure of the pressure regulating mechanism of the dental material mechanics test head proposed by the present invention. Figure 1 ; Figure 5 This is a schematic diagram of the structure of the pressure regulating mechanism of the dental material mechanics test head proposed by the present invention. Figure 2 ; Figure 6 for Figure 2 A partial enlarged view of the middle A; Figure 7 This is a schematic diagram of the overall structure of an indenter for a dental material mechanics experiment proposed by the present invention; Figure 8 for Figure 7 A partial enlarged view of point B in the middle.

[0014] Among them, 1. Main body, 2. Pressure head contact part, 3. Moving plate, 301. Through hole, 302. Fixed block, 303. Rotating shaft, 4. Elastic energy storage connector, 401. Threaded rod, 402. Adjusting nut, 403. Spring, 5. Locking telescopic rod, 6. Pressure adjustment mechanism, 601. Driving motor, 602. Main shaft, 603. Transmission shaft, 604. Adjusting gear set, 6041. Driving small gear, 6042. Driving large gear, 6043. Driving middle gear , 605, transmission gear set, 6051, driven large gear, 6052, driven small gear, 6053, driven middle gear, 606, transmission ring, 607, crank, 608, connecting rod, 609, splint, 7, threaded transmission mechanism, 701, nut sleeve, 702, screw, 8, dynamic impact simulation mechanism, 801, telescopic shaft, 802, bevel gear set, 8021, bevel gear one, 8022, bevel gear two, 8023, bevel gear three, 803, cam. DETAILED DESCRIPTION

[0015] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0016] In the description of the present invention, it should be noted that the terms "center," "up," "down," "left," "right," "vertical," "horizontal," "inside," "outside," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The present invention will be further described below in conjunction with the accompanying drawings.

[0017] like Figures 1-8 As shown, the present invention provides an indenter for oral material mechanics experiment, comprising a main body 1 and an indenter contact member 2, the indenter contact member 2 being movable and located at the bottom of the main body 1, a movable plate 3 being slidably connected in the main body 1, an elastic energy storage connector 4 and a locking telescopic rod 5 being provided under the movable plate 3, multiple sets of the elastic energy storage connector 4 and the locking telescopic rod 5 are provided, the bottom ends of the elastic energy storage connector 4 and the locking telescopic rod 5 are connected to the indenter contact member 2, a locking rod is provided on the locking telescopic rod 5, and when it is necessary to simulate the state of teeth being clenched for a long time during chewing, the indenter contact member 2 is at the farthest distance from the movable plate 3. When the vehicle is released, the locking rod is pressed toward the inside of the locking telescopic rod 5, so that the output end of the locking telescopic rod 5 cannot be retracted into the base of the locking telescopic rod 5, thereby fixing the distance between the pressure head contact 2 and the movable plate 3. A pressure regulating mechanism 6 and a threaded transmission mechanism 7 are installed in the main body 1. The threaded transmission mechanism 7 is connected to the pressure regulating mechanism 6 in a transmission manner, and the threaded transmission mechanism 7 is connected to the movable plate 3 in a transmission manner. A dynamic impact simulation mechanism 8 is provided on the movable plate 3, and the dynamic impact simulation mechanism 8 is connected to the pressure regulating mechanism 6 in a transmission manner, and the dynamic impact simulation mechanism 8 is connected to the pressure head contact 2 in a transmission manner.

[0018] like Figure 1-Figure 5As shown, the pressure regulating mechanism 6 includes a driving motor 601, a main shaft 602, a transmission shaft 603, an adjusting gear set 604 and a transmission gear set 605. The driving motor 601 is fixedly mounted under the inner top wall of the main body 1, and the main shaft 602 is mounted under the output end of the driving motor 601. The main shaft 602 has a sliding limit track in the vertical direction that slides with the adjusting gear set 604 to limit the adjusting gear set 604 to slide only in the vertical direction of the main shaft 602. The bottom end of the main shaft 602 is connected to a transmission ring 606. The transmission shaft 603 is rotatably arranged under the inner top wall of the main body 1. The adjusting gear set 604 is slidably arranged on the main shaft 602. The transmission gear set 605 is arranged on the transmission shaft 603. The transmission gear set 605 and the adjusting gear The gear group 604 is arranged in cooperation with each other, and the different gear combinations of the multi-stage switchable adjustment gear group 604 and the transmission gear group 605 are used. By adjusting the transmission ratio of the gear group 604, the rotation speed and the downward stroke of the threaded transmission mechanism 7 can be controlled, thereby accurately controlling the size and speed of the pressure applied by the pressure head contact member 2 under the movable plate 3; the adjustment gear group 604 includes a driving pinion 6041, a driving large gear 6042 and an active middle gear 6043, and the driving pinion 6041, the driving large gear 6042 and the active middle gear 6043 are connected in sequence from top to bottom, and the driving pinion 6041, the driving large gear 6042 and the active middle gear 6043 are all slidably sleeved on the main shaft 602, and the transmission gear group 605 includes a driving pinion 6041, a driving large gear 6042 and a driving middle gear 6043. The driven large gear 6051, the driven small gear 6052 and the driven middle gear 6053 are all fixedly sleeved on the transmission shaft 603, the driven large gear 6051 is matched with the driving small gear 6041, the driven small gear 6052 is matched with the driving large gear 6042, and the driven middle gear 6053 is matched with the driving middle gear 6043; the pressure regulating mechanism 6 also includes a crank 607, a connecting rod 608 and a splint 609, the rotating shaft of the crank 607 is rotated and penetrates the side wall of the main body 1, one end of the connecting rod 608 is connected to the rotating shaft of the crank 607, the splint 609 is hinged to the other end of the connecting rod 608, and the splint 60 9 is provided in cooperation with the driving large gear 6042, and the driving large gear 6042 can be rotatably located in the interlayer of the clamping plate 609. The rotation of the connecting rod 608 is controlled by turning the crank 607. The connecting rod 608 drives the clamping plate 609 to move, and the clamping plate 609 drives the driving large gear 6042 and the driving small gears 6041 and the driving middle gear 6043 located on the upper and lower sides thereof to slide and adjust on the main shaft 602, so that the corresponding gears in the adjustment gear set 604 are engaged with the corresponding gears in the transmission gear set 605, such as the driving small gear 6041 is engaged with the driven large gear 6051, the driving large gear 6042 is engaged with the driven small gear 6052, or the driving middle gear 6043 is engaged with the driven middle gear 6053.

[0019] like Figure 2-Figure 3As shown, the threaded transmission mechanism 7 includes a nut sleeve 701 and a screw 702. The nut sleeve 701 is fixedly connected to the bottom side of the transmission ring 606. The screw 702 is threadedly adapted to the nut sleeve 701. The screw 702 can be passed through the transmission ring 606 and the transmission shaft 603 in a contactless manner. The bottom end of the screw 702 is fixedly connected to the movable plate 3. The transmission shaft 603 drives the nut sleeve 701 to rotate through the transmission ring 606. Under the action of the threaded transmission, the screw 702 converts the rotational motion into the vertical motion of the movable plate 3.

[0020] like Figure 1-Figure 3 and Figure 6 As shown, the dynamic impact simulation mechanism 8 includes a telescopic shaft 801, a bevel gear set 802 and a cam 803. A through hole 301 is provided on the movable plate 3, and two groups of through holes 301 are provided. A fixed block 302 is fixedly provided on the movable plate 3, and two groups of fixed blocks 302 are relatively provided. The opposite side walls of the two groups of fixed blocks 302 are rotatably provided with a rotating shaft 303. The telescopic shaft 801 is telescopically provided in the main shaft 602, and a vertical groove is provided on the inner side of the main shaft 602 to cooperate with the telescopic shaft 801. The telescopic shaft 801 can be rotated normally with the main shaft 602 while the telescopic shaft 801 is telescopic. The bevel gear set 802 includes a bevel gear 1 8021, a bevel gear 2 8022 and a bevel gear 3 8023. The bevel gear 1 8021 is rotatably provided on the movable plate 3, and the rotating shaft of the bevel gear 1 8021 is fixedly connected to the bottom end of the telescopic shaft 801. Bevel gear 2 8022 and bevel gear 3 8023 are respectively connected to the ends of the two groups of rotating shafts 303. Bevel gear 2 8022 and bevel gear 3 8023 are both meshed with bevel gear 1 8021. Two groups of cams 803 are set and are fixedly sleeved on the two groups of rotating shafts 303 respectively. The cams 803 are arranged in cooperation with the through holes 301. The main shaft 602 rotates to drive bevel gear 1 8021 to rotate through the telescopic shaft 801. Bevel gear 1 8021 drives bevel gear 2 8022 and bevel gear 3 8023 to rotate. Bevel gear 2 8022 and bevel gear 3 8023 drive the cam 803 on the rotating shaft 303 to rotate. The cam 803 will slap the pressure head contact piece 2 through the through hole 301, thereby transmitting pressure to the pressure head contact piece 2. The pressure head installed on the pressure head contact piece 2 simulates the instantaneous impact when the teeth bite hard objects.

[0021] like Figure 1 、 Figure 7 and Figure 8 As shown, the elastic energy storage connector 4 includes a threaded rod 401, an adjusting nut 402 and a spring 403. The top end of the threaded rod 401 is fixedly mounted under the movable plate 3. The adjusting nut 402 is threadedly adapted to be fitted on the threaded rod 401. The spring 403 is connected to the pressure head contact member 2 between the adjusting nut 402. The spring 403 is sleeved outside the threaded rod 401. Rotating the adjusting nut 402 can change the pre-compression amount of the spring 403 to achieve the setting of the initial impact force.

[0022] Small transmission ratio (e.g., the driving small gear 6041 meshes with the driven large gear 6051): low-speed rotation, slow downward pressure of the screw transmission mechanism 7, high pressure, and low tapping frequency of the cam 803, suitable for simulating "heavy bite, low-frequency impact" (e.g., cracking nuts); Large transmission ratio (such as the driving large gear 6042 meshing with the driven small gear 6052): high-speed rotation, the screw transmission mechanism 7 presses down quickly and with low pressure, and the cam 803 taps at a high frequency, which is suitable for simulating "light bites, high-frequency impacts" (such as chewing soft food).

[0023] Pressure and impact linkage: by changing the gear combination, the pressure and impact frequency can be adjusted synchronously, for example: Simulating incisor biting: Select the "low pressure, high frequency impact" combination, using the active large gear 6042 and the driven small gear 6052; Simulating molar chewing: Select the "high pressure, low frequency impact" combination, using the active small gear 6041 and the driven large gear 6051; During the experiment, the driving motor 601 can be paused, and the transmission ratio or the pre-compression amount of the spring 403 can be quickly adjusted by turning the crank 607 or adjusting the nut 402 without disassembling the equipment.

[0024] During specific use, a dynamic impact experiment is performed to simulate the dynamic impact of the oral material. The locking telescopic rod 5 is kept unlocked, and the adjusting nut 402 of the elastic energy storage connector 4 is rotated to change the pre-compression amount of the spring 403 and set the initial contact force between the indenter contact member 2 and the sample. By turning the crank 607, the clamping plate 609 is driven to translate through the connecting rod 608, so that the adjusting gear set 604 moves on the sliding limit track of the main shaft 602, realizing the meshing of different gear combinations. After adjusting to the appropriate transmission ratio, the driving motor 601 is started, and the driving motor 601 drives the main shaft 602 to rotate. Under the cooperation of the adjusting gear set 604 and the transmission gear set 605 on the main shaft 602, the transmission shaft 603 is driven to rotate. The transmission shaft 603 drives the nut sleeve 701 to rotate through the transmission ring 606. Under the action of the threaded transmission, the screw 702 converts the rotational motion into the vertical motion of the movable plate 3. The movable plate 3 drives the pressure head contact member 2 to extend out of the bottom end of the main body 1 through the elastic energy storage connector 4 and the locking telescopic rod 5; At the same time, the main shaft 602 rotates through the telescopic shaft 801 to drive the bevel gear 1 8021 to rotate, and the bevel gear 1 8021 drives the bevel gear 2 8022 and the bevel gear 3 8023 to rotate, and the bevel gear 2 8022 and the bevel gear 3 8023 drive the cam 803 on the rotating shaft 303 to rotate, and the cam 803 will slap the pressure head contact piece 2 through the through hole 301, thereby transmitting the pressure to the pressure head contact piece 2, and the pressure head installed on the pressure head contact piece 2 simulates the instantaneous impact when the teeth bite into a hard object. The cam 803 slaps the pressure head contact piece 2 once every rotation, simulating the instantaneous impact of the teeth biting into a hard object. The spring 403 of the elastic energy storage connector 4 compresses and stores energy at the moment of slapping, and then releases the energy to enhance the impact effect. The locking telescopic rod 5 is synchronously extended and retracted with the pressure head contact piece 2 to ensure that the pressure head is vertically stressed and avoids lateral deviation. When it is necessary to switch to the static impact test, when the pressure head contact piece 2 is pressed down to the target position, press the locking rod to lock the locking telescopic rod 5 to prevent it from extending and retracting, and continue to apply constant pressure to the sample to simulate the static force scenario of teeth clenching for a long time. After the experiment is over, turn off the drive motor 601, unlock the locking telescopic rod 5, and the screw 702 rotates in the opposite direction to drive the movable plate 3 to reset.

[0025] The present invention and its embodiments are described above. This description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs structures and embodiments similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. An indenter for a dental material mechanics experiment, comprising a main body (1) and an indenter contact piece (2), wherein the indenter contact piece (2) is movably located at the bottom of the main body (1), and is characterized in that: A movable plate (3) is slidably connected in the main body (1), and an elastic energy storage connector (4) and a locking telescopic rod (5) are provided below the movable plate (3). The elastic energy storage connector (4) and the locking telescopic rod (5) are provided in multiple groups, and the bottom ends of the elastic energy storage connector (4) and the locking telescopic rod (5) are connected to the pressure head contact member (2). A pressure regulating mechanism (6) and a threaded transmission mechanism (7) are installed in the main body (1), and the threaded transmission mechanism (7) is transmission-connected to the pressure regulating mechanism (6), and the threaded transmission mechanism (7) is transmission-connected to the movable plate (3). A dynamic impact simulation mechanism (8) is provided on the movable plate (3), and the dynamic impact simulation mechanism (8) is transmission-connected to the pressure regulating mechanism (6), and the dynamic impact simulation mechanism (8) is transmission-connected to the pressure head contact member (2).

2. The dental material mechanics test indenter according to claim 1, characterized in that: The pressure regulating mechanism (6) comprises a driving motor (601), a main shaft (602), a transmission shaft (603), an adjusting gear set (604) and a transmission gear set (605), wherein the driving motor (601) is fixedly mounted below the inner top wall of the main body (1), the main shaft (602) is mounted below the output end of the driving motor (601), the bottom end of the main shaft (602) is connected to a transmission ring (606), the transmission shaft (603) is rotatably mounted below the inner top wall of the main body (1), the adjusting gear set (604) is slidably mounted on the main shaft (602), the transmission gear set (605) is mounted on the transmission shaft (603), and the transmission gear set (605) is arranged in coordination with the adjusting gear set (604).

3. The dental material mechanics test indenter according to claim 2, characterized in that: The pressure regulating mechanism (6) further comprises a crank (607), a connecting rod (608) and a splint (609), wherein the rotating shaft of the crank (607) is arranged to rotate and pass through the side wall of the main body (1), one end of the connecting rod (608) is connected to the rotating shaft of the crank (607), the splint (609) is hinged to the other end of the connecting rod (608), and the splint (609) is arranged in cooperation with the regulating gear set (604).

4. The dental material mechanics test indenter according to claim 2, characterized in that: The threaded transmission mechanism (7) comprises a nut sleeve (701) and a screw (702), wherein the nut sleeve (701) is fixedly connected to the bottom side of the transmission ring (606), the screw (702) and the nut sleeve (701) are threadably adapted, and the screw (702) can be non-contactably passed through the transmission ring (606) and the transmission shaft (603), and the bottom end of the screw (702) is fixedly connected to the movable plate (3).

5. The dental material mechanics test indenter according to claim 2, characterized in that: The dynamic impact simulation mechanism (8) comprises a telescopic shaft (801), a bevel gear set (802) and a cam (803); a through hole (301) is provided on the movable plate (3); a fixed block (302) is fixedly provided on the movable plate (3); a rotating shaft (303) is rotatably provided on the side wall of the fixed block (302); the telescopic shaft (801) is telescopically provided in the main shaft (602); the bevel gear set (802) is transmission-connected to the telescopic shaft (801); and the bevel gear set (802) is transmission-connected to the rotating shaft (303).

6. The dental material mechanics test indenter according to claim 1, characterized in that: The elastic energy storage connection member (4) comprises a threaded rod (401), an adjusting nut (402) and a spring (403), wherein the top end of the threaded rod (401) is fixedly mounted under the movable plate (3), the adjusting nut (402) is threadedly adapted to be fitted on the threaded rod (401), the spring (403) is connected between the pressure head contact member (2) and the adjusting nut (402), and the spring (403) is sleeved outside the threaded rod (401).

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