CN210114548U - Thoracic constant pressure loading device - Google Patents

Abstract

The utility model discloses a lifting mechanism which comprises a driving mechanism, a lifting mechanism and a force application mechanism; the driving mechanism comprises a stepping motor, a first bevel gear shaft and a second bevel gear shaft which are arranged along the same horizontal shaft and are connected through a shaft connecting piece in sequence; the lifting mechanism comprises two same lifting devices, and each lifting device comprises a bevel gear, a lifting shaft, a nut and a supporting member which are sequentially connected from bottom to top; the bevel gears of the two lifting devices are respectively meshed with a first bevel gear shaft and a second bevel gear shaft which form a 90-degree crossed angle; the upper section of each lifting shaft is processed into a screw section, a nut is screwed on the screw section to form a screw structure, the lower section of each lifting shaft is fixed in a central hole of a bevel gear, and a supporting member is fixed at the top end of the nut; the force application mechanism is arranged on the lifting mechanism and is driven by the lifting mechanism to lift and transfer constant pressure; the device can accurately control the feeding amount of the force application mechanism, realizes continuous constant force loading, can bear large torque, and is reliable in transmission and stable in lifting.

Description

Thoracic constant pressure loading device

Technical Field

The utility model relates to a constant force loading technical field, in particular to thorax constant voltage loading device.

Background

Congenital deformities of the chest wall are mainly divided into two symptoms-a sunken deformity (infundibular chest) and a protruded deformity (chicken chest), wherein sunken deformity is the most common congenital thoracic deformity, occurring mainly in the lower half of the sternum, as a result of abnormal and unbalanced growth of costal cartilage connecting each rib and the sternum. Studies have now shown that a depression in the sternum limits the volume of the chest and that a reduction in lung volume can lead to difficulties in endurance exercise or strenuous exercise for the child; at the same time, the depressed sternum also constrains the heart, impeding blood flow in the heart.

Mechanics biology is the study of the influence of mechanical environment (stimuli) on the health, disease or injury of an organism, the study of the mechanism of the organism's perception and response to mechanical signals, and the elucidation of the interrelationship between the organism's mechanical processes and biological processes such as growth, reconstruction, adaptation changes and repair. Therefore, the research on the bone reconstruction action mechanism of the thorax under the external load is significant for the development of a new funnel chest orthopedic technology, a miniature pig which is very similar to human beings in aspects of skeletal development, physiological characteristics and the like is selected for experiments, a loading device which is suitable for the miniature pig and can continuously apply constant pressure is designed to reconstruct the mechanical environment of a sternum area, the bone reconstruction action mechanism of the area under the external load is analyzed, and a certain theoretical basis is provided for solving the clinical funnel chest orthopedic problem.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a can realize lasting constant force loading, accurate loading and adjustable size's thorax constant voltage loading device.

Therefore, the utility model discloses technical scheme as follows:

a thoracic constant pressure loading device comprises a driving mechanism, a lifting mechanism and a force application mechanism; wherein the content of the first and second substances,

the driving mechanism comprises a stepping motor, a first bevel gear shaft and a second bevel gear shaft which are arranged in the frame body along the same horizontal shaft and are connected through a shaft connecting piece in sequence, so that the first bevel gear shaft and the second bevel gear shaft synchronously rotate in the same direction under the driving of the stepping motor;

the lifting mechanism comprises two same lifting devices which are symmetrically arranged above the driving mechanism; each lifting device comprises a bevel gear, a lifting shaft, a nut and a supporting member which are arranged along the same vertical shaft from bottom to top and are connected in sequence; the bevel gears of the two lifting devices are respectively meshed with a first bevel gear shaft and a second bevel gear shaft which form a 90-degree crossed angle therebetween so as to synchronously rotate along with the first bevel gear shaft and the second bevel gear shaft; the upper section of each lifting shaft is processed into a screw section, a nut is screwed on the screw section to form a screw structure (such as a trapezoidal thread screw), the lower section of each lifting shaft is fixed in a central hole of a corresponding bevel gear, and a support member is fixed at the top end of the nut, so that the support member can ascend or descend along the shaft along with the rotation of the bevel gear;

the force application mechanism is arranged on the lifting mechanism, is driven by the lifting mechanism to lift, and transmits constant pressure loaded on the force application mechanism by the lifting mechanism to the thorax of the organism.

Further, the first bevel gear shaft and the second bevel gear shaft are connected through a toothed shaft; the gear shaft consists of a smooth shaft section and a straight gear ring section, the end part of the smooth shaft section is fixed in the central hole of the second bevel gear shaft, and the straight gear ring section is inserted in the central hole of the first bevel gear shaft; the tooth grooves which are matched with the straight tooth rings of the tooth-shaped shaft are machined on the hole wall of the central hole of the first bevel gear shaft, so that the tooth-shaped shaft can axially reciprocate relative to the first bevel gear shaft to adjust the distance between the first bevel gear shaft and the second bevel gear shaft, and the second bevel gear shaft can synchronously rotate along with the first bevel gear shaft.

Furthermore, an adjusting mechanism is arranged below the driving mechanism and comprises a base, a first sliding plate, a second sliding plate and a screw rod; the base is of a rectangular frame structure, two parallel through grooves are formed in the top surface of the base along the axial direction, the first sliding plate and the second sliding plate are symmetrically arranged on the base and are in an inverted U shape, and two strip-shaped edges perpendicular to the base are respectively arranged in the two through grooves, so that reciprocating motion on the base along the sliding grooves is realized; the screw rod comprises a screw rod shaft and two rectangular nuts, two sections of T-shaped threads with opposite rotation directions are respectively processed on the outer walls of two sides of the screw rod shaft, the two rectangular nuts are respectively screwed on the shaft sections processed with the T-shaped threads with different rotation directions, and the two rectangular nuts are respectively fixed on the bottom surfaces of the first sliding plate and the second sliding plate, so that when the screw rod shaft rotates in a certain direction, the first sliding plate and the second sliding plate can slide oppositely or oppositely; an axial through hole penetrating through the whole rectangular frame is formed in the side wall of one side of the base, the forming direction of the axial through hole is parallel to the forming direction of the sliding groove, a deep groove ball bearing is arranged in each axial through hole, a screw rod shaft is rotatably arranged in the axial through hole of the base in a penetrating mode, and two rectangular nuts positioned on the screw rod shaft are positioned on the inner side of a frame of the rectangular frame; a first locking nut is respectively arranged on the two sides of the screw rod shaft and positioned on the outer side of the base in a penetrating way and is fixedly connected with the screw rod shaft in a threaded way so as to limit the screw rod shaft to move left and right on the base; a handle is fixed at one end of the screw shaft.

Further, a protruding shaft is formed by extending upwards from the top surface of the supporting member along the axial direction, and an end cover is detachably fixed at the top end of the protruding shaft, and the outer diameter of the end cover is larger than that of the protruding shaft.

Further, the force application mechanism comprises a U-shaped plate, a rectangular block with an arc plate and a limiting plate; the U-shaped plate is formed by integrally forming a transverse plate and two vertical plates of which the top edges are connected with the transverse plate, a rectangular through hole is formed in the center of the transverse plate, a rectangular flange is arranged on the bottom surface of the transverse plate and on the periphery surrounding the rectangular through hole, strip-shaped limiting holes are formed in two sides of the rectangular through hole respectively, and the aperture of each strip-shaped limiting hole is matched with the outer diameter of a convex shaft of each supporting member, so that the convex shafts of the two supporting members are respectively arranged in the two strip-shaped limiting holes in a penetrating manner and can slide and move in the strip-shaped limiting holes along with the change of the distance between the first bevel gear; the aperture of the strip-shaped limiting hole is smaller than the outer diameter of the end cover, so that the supporting member is limited on the U-shaped plate; the rectangular block with the arc plate consists of an arc plate with a concave top surface and a rectangular block fixed on the central line of the bottom surface of the arc plate, and the rectangular block is inserted in the rectangular through hole to ensure that the arc plate is pressed on the top surface of the U-shaped plate; the limiting plate is fixed on the rectangular flange and the rectangular block of the rectangular block with the arc plate through screws.

Furthermore, a first guide rail plate and a second guide rail plate which are parallel to the vertical plate are respectively arranged on two sides of the U-shaped plate, and the first guide rail plate and the second guide rail plate are arranged in parallel and are respectively fixed on two sides of the base through screws; equal vertical and symmetry are fixed with two bar guide rails on the inboard face of first guide rail board and second guide rail board, are fixed with the sliding block set that suits with the bar guide rail on two riser outside faces of U-shaped board, make every bar guide rail correspond and set up in two piece at least spaced sliders, through with first guide rail board and second guide rail board respectively with be located the U-shaped board riser swing joint of adjacent side, realize that the U-shaped board slides along the axial under the guide effect of first guide rail board and second guide rail board.

Furthermore, a reinforcing plate is arranged between the first guide rail plate and the second guide rail plate respectively, and each reinforcing plate is fixed on the first guide rail plate and the second guide rail plate through screws.

Further, the driving mechanism further comprises a first frame and a second frame; the first frame is a rectangular frame consisting of two transverse plates arranged in parallel and two vertical plates fixed on two sides of the two transverse plates respectively, and is fixed on the first sliding plate; an axial through hole for penetrating and installing a first bevel gear is formed in a transverse plate above the first frame, and two radial through holes for penetrating and installing a transmission shaft of the stepping motor and a first bevel gear shaft are formed in the two vertical plates respectively; the stepping motor is fixed on the outer side wall surface of the vertical plate; the second frame is a V-21274formed by two parallel transverse plates and a vertical plate which is arranged close to the outer side of the driving mechanism and fixed on one side of the two transverse plates; an axial through hole for penetrating a second bevel gear is formed in a transverse plate above the second frame, a radial through hole for penetrating a second bevel gear shaft is formed in a vertical plate, and a second locking nut is arranged on a threaded part of the second bevel gear shaft extending out of the second frame; and a deep groove ball bearing is arranged in each radial through hole and each axial through hole, so that the shaft element penetrating into the through holes can be rotatably arranged in each through hole.

Furthermore, threaded sections are processed in the middle parts of the two lifting shafts, and a sleeve and a third locking nut are sleeved on each lifting shaft; wherein, the cover cylinder suit is in the optical axis section of lifting shaft and supports on the bottom surface that is located the deep groove ball bearing in the frame axial through-hole, and third lock nut threaded connection is on lifting shaft upper thread section and press-fit on the top end face that is located the deep groove ball bearing in the frame axial through-hole, carries on spacingly to the radial activity of two lifting shafts to guarantee that bevel gear meshes with corresponding bevel gear axle all the time.

Furthermore, the thorax constant pressure loading device also comprises a fixing mechanism which comprises two Z-shaped plates respectively fixed on the first sliding plate and the second sliding plate, wherein each Z-shaped plate consists of two transverse plates and a vertical plate connected with the two transverse plates; the two Z-shaped plates are arranged in axial symmetry, so that the two Z-shaped plates are combined to form a U-shaped structure, and the transverse plate positioned above the two Z-shaped plates is positioned outside the device; and a circular through hole which is matched with the outer diameter of the limb of the experimental object is formed in the center of the transverse plate above each Z-shaped plate.

Compared with the prior art, the thorax constant pressure loading device has the beneficial effects that:

(1) the driving mechanism of the device adopts a mode that the stepping motor drives the bevel gear mechanism to drive, so that the power transmission of two vertical shafts is realized, and meanwhile, the feeding amount of the force application mechanism can be accurately controlled by controlling the angular displacement of the stepping motor according to the transmission ratio between the bevel gear pair and the screw rod nut, so that the continuous constant force loading is realized;

(2) the adjusting mechanism of the device adopts a lead screw nut for adjustment, a toothed shaft can slide in the driving mechanism, and a slidable strip-shaped limiting hole is arranged in the force application mechanism, so that the width of the device can be adjusted randomly as required on the premise of ensuring that a force output point is kept in the middle of the device, and the adaptability is improved; because two sections of threads with opposite rotation directions and the same other threads are arranged on the adjusting shaft, the two sliding plates can move back and forth or oppositely at equal intervals only by rotating the handle clockwise or anticlockwise for a plurality of circles according to the length to be adjusted, and the function of accurate adjustment can be realized;

(3) the toothed shaft of the device can realize sliding expansion and can bear larger torque, and the transmission is reliable;

(4) the device is provided with a slide block guide rail mechanism, plays a role in guiding and enables the lifting of the force application mechanism to be more stable.

Drawings

FIG. 1 is a schematic structural view of the thoracic constant pressure loading device of the present invention;

FIG. 2 is a schematic structural view of the thoracic constant pressure loading device of the present invention without installing the Z-shaped plate and the reinforcing plate;

FIG. 3 is a schematic structural view of the thoracic constant pressure loading device of the present invention without a force applying mechanism;

FIG. 4 is a schematic structural diagram of an adjusting mechanism of the thoracic constant pressure loading device of the present invention;

FIG. 5 is a schematic structural view of a U-shaped plate of the thoracic constant pressure loading device of the present invention;

fig. 6 is a schematic structural diagram of the lifting device of the thoracic constant pressure loading device of the present invention.

Detailed Description

The present invention will be further described with reference to the following drawings and specific examples, but the following examples are by no means limiting the present invention.

As shown in figures 1 and 2, the thoracic constant pressure loading device comprises a driving mechanism, a lifting mechanism, a force application mechanism and an adjusting mechanism.

As shown in fig. 3, the driving mechanism includes a stepping motor 1, a connecting shaft 2, a first bevel gear shaft 4, a tooth shaft 3 and a second bevel gear shaft 5 which are arranged along the same horizontal axis and connected in sequence; specifically, the shaft end of the stepping motor 1 is inserted into a central hole at one end of the connecting shaft 2 and is relatively fixed through a set screw, so that the connecting shaft 2 rotates along with the rotation of the motor shaft of the stepping motor 1; the other end of the connecting shaft 2 is inserted into a central hole at one end of the first bevel gear shaft 4 in an interference fit mode, so that the first bevel gear shaft 4 synchronously rotates along with the connecting shaft 2; in order to realize the width adjustment of the device, the first bevel gear shaft 4 and the second bevel gear shaft 5 are connected through the tooth-shaped shaft 3, the outer wall of one end of the tooth-shaped shaft 3 is processed into a smooth surface, and the optical axis end is inserted into a central hole of the second bevel gear shaft 5 in an interference fit manner; be equipped with the round straight-tooth on the other end outer wall of profile of tooth axle 3 along the circumferencial direction, correspondingly, it has matched with straight-tooth groove to process on the centre bore inner wall of first bevel gear axle 4 that is connected with profile of tooth axle 3, realize profile of tooth axle 3 and rotate along with first bevel gear axle 4 is synchronous, and then drive second bevel gear axle 5 and rotate along with profile of tooth axle 3 is synchronous, and simultaneously, because the one end of profile of tooth axle 3 can follow the central hole of axial activity ground setting at first bevel gear axle 4 in, and then make profile of tooth axle 3 along axial slip in the central hole of first bevel gear axle 4, realize that the interval between first bevel gear axle 4 and the second bevel gear axle 5 is adjustable.

As shown in fig. 3, the lifting mechanism includes two lifting devices symmetrically disposed above the driving mechanism, each lifting device includes a bevel gear, a lifting shaft, a nut, a supporting member and an end cover, which are disposed along the same vertical shaft from bottom to top and are connected in sequence; specifically, as shown in fig. 6, the first bevel gear 6 is meshed with the first bevel gear shaft 4, and the angle of intersection between the first bevel gear and the first bevel gear shaft 4 is 90 °, so that the first bevel gear 6 rotates along with the rotation of the first bevel gear shaft 4 and drives the first lifting shaft 8 to rotate; the first lifting shaft 8 consists of a screw section 8a positioned at the upper part, a threaded section 8b positioned at the middle part and a smooth shaft section 8c positioned at the lower part, the screw section 8a at the upper part is screwed in the first nut 10 to form a trapezoidal thread screw rod structure, and the smooth shaft section 8c at the lower part is inserted in the central hole of the first bevel gear 6 in an interference fit manner; the first supporting member 12 is inserted and fixed at the top end of the first nut 10 in an interference fit manner, and the top of the first supporting member extends upwards along the axial direction to form a protruding shaft; the first end cap 14 is detachably fixed to the protruding shaft of the first support member 12 by a screw, and has an outer diameter larger than that of the protruding shaft;

similarly, as shown in fig. 6, the second bevel gear 7 is meshed with the second bevel gear shaft 5, and the shaft angle of the second bevel gear 7 and the second bevel gear shaft 5 is 90 °, so that the second bevel gear 7 rotates along with the rotation of the second bevel gear shaft 5 and drives the second lifting shaft 9 to rotate; the second lifting shaft 9 is composed of a screw section 9a positioned at the upper part, a threaded section 9b positioned at the middle part and a smooth shaft section 9c positioned at the lower part, so that the screw section 9a at the upper part is screwed in the second nut 11 to form a trapezoidal thread screw rod structure, and the smooth shaft section 9c at the lower part is inserted in the central hole of the second bevel gear 7 in an interference fit manner; the second supporting member 13 is inserted and fixed at the top end of the second nut 11 in an interference fit manner, and the top of the second supporting member extends upwards along the axial direction to form a protruding shaft; the second end cap 15 is detachably fixed to the protruding shaft of the second support member 13 by a screw, and the outer diameter thereof is larger than that of the protruding shaft;

the two lifting devices synchronously move up or down under the action of the driving mechanism, and specifically, the first bevel gear 6 and the second bevel gear 7 are driven to synchronously rotate in the same direction in the rotation transmission process of the first bevel gear shaft 4 and the second bevel gear shaft 5; in the synchronous and equidirectional rotation process of the first bevel gear 6 and the second bevel gear 7, as the bottom ends of the first lifting shaft 8 and the second lifting shaft 9 are respectively inserted into the central holes of the first bevel gear 6 and the second bevel gear 7 to form tight fit, the first lifting shaft 8 and the second lifting shaft 9 can drive the nut to simultaneously ascend or descend along the axis direction in the clockwise or anticlockwise rotation process.

As shown in fig. 1 and 2, the force application mechanism comprises a U-shaped plate 18, a rectangular block 16 with a circular arc plate and a limit plate 17; specifically, as shown in fig. 5, the U-shaped plate 18 is formed by integrally molding a horizontal plate 18e and two vertical plates 18d, the top edges of which are connected to the horizontal plate 18e, a rectangular through hole 18a is formed in the center of the horizontal plate 18e, a rectangular flange 18c is formed on the bottom surface of the horizontal plate 18e and around the periphery of the rectangular through hole 18a, a strip-shaped limiting hole 18b is further formed on each of the two sides of the rectangular through hole 18a, and the aperture of each of the two strip-shaped limiting holes 18b is adapted to the outer diameters of the first support member 12 protruding shaft and the second support member 13 protruding shaft, so that the first support member 12 protruding shaft and the second support member 13 protruding shaft are respectively inserted into the two strip-shaped limiting holes 18b and can slide and move in the strip-shaped limiting holes 18b along with the change of the distance between the first bevel gear shaft 4 and the; the aperture of the strip-shaped limiting hole 18b is smaller than the outer diameter of the first end cover 14 (the second end cover 15), so that the first supporting member 12 and the second supporting member 13 are limited on the U-shaped plate 18, and simultaneously, the U-shaped plate 18 is supported to play a role of conducting power; the rectangular block 16 with the arc plate is composed of an arc plate with a concave top surface and a rectangular block fixed on the center line of the bottom surface of the arc plate, and the rectangular block is inserted in the rectangular through hole 18a to ensure that the arc plate is pressed on the top surface of the U-shaped plate 18; the stopper plate 17 is a rectangular plate having the same size as the rectangular flange 18c, and is fixed to the rectangular flange 18c by a plurality of screws arranged in the circumferential direction of the rectangular flange 18c while the height of the rectangular plate is adapted to the sum of the thickness of the transverse plate 18e and the rectangular flange 18c, so that the stopper plate 17 is fixed to the rectangular plate of the circular arc plate-attached rectangular block 16 by a plurality of screws arranged at the center.

As shown in fig. 2, 3 and 4, the adjusting mechanism includes a base 22, a first slide plate 19, a second slide plate 20, and a lead screw; in particular, the amount of the solvent to be used,

the base 22 is a rectangular frame structure, and two parallel through grooves are axially formed on the top surface of the base and are used as sliding grooves matched with the first sliding plate 19 and the second sliding plate 20; the first sliding plate 19 and the second sliding plate 20 are symmetrically arranged on the base 22, both of which are in an inverted U-shaped structure with the same size, and the distance between two strip-shaped edges on each sliding plate, which are perpendicular to the base 22, is adapted to the distance between two mutually parallel sliding grooves, so that the first sliding plate 19 and the second sliding plate 20 respectively realize reciprocating motion on the base 22 along the sliding grooves by arranging the two strip-shaped edges, which are perpendicular to the base 22, in the two sliding grooves;

the screw comprises a screw shaft 21a and two rectangular nuts 21 b; two sections of T-shaped threads with opposite turning directions are respectively processed on the outer walls of two sides of the screw shaft 21a, two rectangular nuts 21b are respectively screwed on shaft sections processed with the T-shaped threads with different turning directions, and the two rectangular nuts 21b are respectively fixed on the bottom surfaces of the first sliding plate 19 and the second sliding plate 20, so that when the screw shaft 21 rotates in a certain direction, the first sliding plate 19 and the second sliding plate 20 slide oppositely or oppositely, and the first sliding plate 19 and the second sliding plate 20 are folded or unfolded;

an axial through hole penetrating through the whole rectangular frame is formed in the side wall of one side of the base 22, the forming direction of the axial through hole is parallel to the forming direction of the sliding groove, a deep groove ball bearing is arranged in each axial through hole, the screw shaft 21 is rotatably arranged in the axial through hole of the base 22 in a penetrating mode, and two rectangular nuts 21b positioned on the screw shaft 21 are positioned on the inner side of a frame of the rectangular frame; a first locking nut 23 is respectively arranged on the two sides of the screw shaft 21 and positioned on the outer side of the base 22 in a penetrating and threaded manner to limit the left and right movement of the screw shaft 21 on the base 18; a handle 24 is sleeved on one end of the screw shaft 21 in an interference fit manner, so that the screw shaft 21 can be manually rotated to adjust the distance between the first sliding plate 19 and the second sliding plate 20.

As shown in fig. 1 and 2, a first guide rail plate 29 and a second guide rail plate 30 parallel to the vertical plate are respectively disposed on both sides of the U-shaped plate 18, the first guide rail plate 29 and the second guide rail plate 30 are disposed in parallel, and are respectively fixed on both sides of the base 22 by a plurality of screws disposed at the lower end edge at intervals; two strip-shaped guide rails 31 are vertically and symmetrically arranged on the inner side plate surface of the first guide rail plate 29, the strip-shaped guide rails 31 are fixed on the same inner side plate surface through screws, two strip-shaped guide rails 31 are vertically and symmetrically arranged on the inner side plate surface of the second guide rail plate 30, and correspondingly, as shown in fig. 5, four sliding blocks 32 are respectively fixed on the outer side plate surfaces of two vertical plates of the U-shaped plate 18 through screws; every two of the four slide blocks 32 are arranged on the same axial direction and are matched with the positions of the strip-shaped guide rails 31 positioned on the adjacent sides of the four slide blocks 32, and the outer side wall surface of each slide block 32 is provided with an axial through groove matched with the size of the strip-shaped guide rails 31, so that the first guide rail plate 29 and the second guide rail plate 30 are movably connected with the U-shaped plate 18 respectively by inserting the two strip-shaped guide rails 31 arranged on the first guide rail plate 31 into the axial through grooves of the slide blocks positioned on the adjacent sides, and the U-shaped plate 18 can move up and down relative to the first guide rail plate 29 and the second guide rail plate 30 along the axial direction under the guiding action of the first guide rail plate 29 and the second; as shown in fig. 1, a reinforcing plate 33 is further disposed between the first rail plate 29 and the second rail plate 30, and each reinforcing plate 33 is fixed to the first rail plate 29 and the second rail plate 30 by a plurality of screws disposed at both side edges at intervals, so that the overall structure is more stable.

As shown in fig. 2 and 3, in order to facilitate the assembly of the device and stabilize the operation state, a first frame 25 is provided on the outer sides of the first bevel gear 6 and the first bevel gear shaft 4 which are engaged with each other, and a second frame 26 is provided on the outer sides of the second bevel gear 7 and the second bevel gear shaft 5 which are engaged with each other; in particular, the amount of the solvent to be used,

the first frame 25 is a square frame formed by two parallel transverse plates and two vertical plates fixed on two sides of the two transverse plates, and is fixed on the first sliding plate 19 through screws; an axial through hole for penetrating and installing the first bevel gear 6 is formed in a transverse plate above the first frame 25, and two radial through holes for penetrating and installing a transmission shaft of the stepping motor and the first bevel gear shaft 4 are formed in the two vertical plates respectively; the stepping motor 1 is fixed on the outer side wall surface of the vertical plate;

the second frame 26 is an Contraband-shaped frame and consists of two parallel transverse plates and a vertical plate which is arranged close to the outer side of the driving mechanism and fixed on the side wall of one side of the two transverse plates, and the vertical plate and the two vertical plates of the first frame 25 are coaxially arranged and are parallel to each other; the second frame 26 is fixed to the second sliding plate 20 by screws; an axial through hole for penetrating the second bevel gear 7 is formed in a transverse plate above the second frame 26, and a radial through hole for penetrating the second bevel gear shaft 5 is formed in a vertical plate; a second lock nut 28 is provided at a threaded portion of the second bevel gear shaft 5 protruding outside the second frame 26;

a deep groove ball bearing is arranged in each radial through hole and each axial through hole, so that a shaft part penetrating through the through holes can be rotatably arranged in the through holes; a sleeve and a clamp spring are respectively arranged on two sides of each deep groove ball bearing to play roles in positioning and limiting;

wherein, the sleeve is sleeved on the optical shaft section of the lifting shaft and is abutted against the bottom surface of the deep groove ball bearing positioned in the axial through hole of the frame, and the third locking nut 27 is in threaded connection with the threaded section on the lifting shaft and is in press fit with the top end surface of the deep groove ball bearing positioned in the axial through hole of the frame

In addition, a sleeve and a third locking nut 27 are sleeved on the first lifting shaft 8, the sleeve is sleeved on the optical shaft section 8c of the first lifting shaft 8 and abuts against the bottom surface of the deep groove ball bearing in the axial through hole of the first frame 25, the third locking nut 27 is in threaded connection with the threaded section 8b of the first lifting shaft 8, the third locking nut 27 is kept in press fit on the top end surface of the deep groove ball bearing in the axial through hole of the first frame 25, the radial movement of the two lifting shafts is limited, and therefore the position of the first bevel gear 6 is guaranteed not to change, and the first bevel gear 6 is constantly kept meshed with the first bevel gear shaft 4; the second lifting shaft 9 is also sleeved with a sleeve and a third locking nut 27, the sleeve is sleeved on the optical axis section 9c of the second lifting shaft 9 and abuts against the bottom surface of the deep groove ball bearing in the axial through hole of the second frame 26, the third locking nut 27 is in threaded connection with the threaded section 9b of the second lifting shaft 9, the third locking nut 27 is kept in press fit with the top end surface of the deep groove ball bearing in the axial through hole of the first frame 25, the radial movement of the two lifting shafts is limited, the position of the second bevel gear 7 is further guaranteed not to change, and the second bevel gear 7 is constantly kept meshed with the second bevel gear shaft 5;

as shown in fig. 1 and 3, the first sliding plate 19 and the second sliding plate 20 are respectively provided with a Z-shaped plate 34, each Z-shaped plate 34 is composed of two transverse plates and a vertical plate connected with the two transverse plates, and the two Z-shaped plates 34 are arranged in axial symmetry so as to form an approximate U-shaped structure by combining the two Z-shaped plates; the two Z-shaped plates 34 are respectively fixed on the first sliding plate 19 and the second sliding plate 20 through a plurality of screws arranged on the bottom plate, and move along with the movement of the sliding plates connected with the Z-shaped plates; a circular through hole 34a which is matched with the outer diameter of the limb of the experimental object is formed in the center of the transverse plate of each Z-shaped plate 34 above; in order to ensure the structural stability of the Z-shaped plate 34, two reinforcing ribs 34b are further provided between each two connected plate surfaces.

The operating principle of the thorax constant pressure loading device is as follows:

taking a certain miniature pig as an example for experiment, firstly measuring the distance between forelimbs of the miniature pig, then adjusting the center distance of the round holes on the two Z-shaped plates 34 by rotating the handle 24, so that the forelimbs of the miniature pig can just pass through the round holes respectively, moving the device integrally and slowly upwards after the forelimbs of the miniature pig pass through the round holes until the rectangular block 16 with the circular arc plate on the U-shaped plate 18 slightly applies force to the middle part of the thorax, namely the sternum, stopping the operation, and at the moment, tightly binding the whole loading device on the front of the thorax of the miniature pig by using a bandage for one circle along the periphery of the thorax; the rotation of the stepping motor 1 is controlled to drive the two pairs of bevel gear transmission mechanisms which are meshed with each other to synchronously rotate, so that the torque is transmitted to the first lifting shaft 8 and the second lifting shaft 9, and the nut and the supporting member support the U-shaped plate 18 and enable the U-shaped plate to move upwards along the guide rail 31 along the rotation of the lifting shafts, so that the rectangular block 16 with the circular arc plate thereon applies force to the sternum part. The device can accurately control the feeding amount of the force application mechanism according to the transmission ratio between the bevel gear pair and the screw rod nut by controlling the angular displacement of the stepping motor 1, thereby realizing continuous constant force loading.

In the description of the present invention, it should be noted that the terms "horizontal plate", "vertical plate", "upper", "lower", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Finally, it should be noted that: the above embodiments are only specific embodiments of the present invention, and are not intended to limit the technical solution of the present invention, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: those skilled in the art can still modify or easily conceive of changes in the technical solutions described in the foregoing embodiments or make equivalent substitutions for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A thoracic constant pressure loading device is characterized by comprising a driving mechanism, a lifting mechanism and a force application mechanism; wherein the content of the first and second substances,

the driving mechanism comprises a stepping motor (1), a first bevel gear shaft (4) and a second bevel gear shaft (5) which are arranged in the frame body along the same horizontal shaft and are connected through a shaft connecting piece in sequence, so that the first bevel gear shaft (4) and the second bevel gear shaft (5) synchronously rotate in the same direction under the driving of the stepping motor (1);

the lifting mechanism comprises two same lifting devices which are symmetrically arranged above the driving mechanism; each lifting device comprises a bevel gear, a lifting shaft, a nut and a supporting member which are arranged along the same vertical shaft from bottom to top and are connected in sequence; bevel gears of the two lifting devices are respectively meshed with a first bevel gear shaft (4) and a second bevel gear shaft (5) which form a 90-degree crossed angle therebetween so as to synchronously rotate along with the first bevel gear shaft and the second bevel gear shaft; the upper section of each lifting shaft is processed into a screw section, a nut is screwed on the screw section to form a screw structure, the lower section of each lifting shaft is fixed in a central hole of a corresponding bevel gear, and a supporting member is fixed at the top end of the nut, so that the supporting member can ascend or descend along the shaft along with the rotation of the bevel gear;

the force application mechanism is arranged on the lifting mechanism, is driven by the lifting mechanism to lift, and transmits constant pressure loaded on the force application mechanism by the lifting mechanism to the thorax of the organism.

2. The thoracic constant pressure loading device as claimed in claim 1, wherein the first bevel gear shaft (4) and the second bevel gear shaft (5) are connected by a toothed shaft (3); the gear shaft (3) is composed of a smooth shaft section and a straight gear ring section, the end part of the smooth shaft section is fixed in the central hole of the second bevel gear shaft (5), and the straight gear ring section is inserted in the central hole of the first bevel gear shaft (4); tooth grooves which are matched with the straight tooth rings of the toothed shafts (3) are machined on the hole walls of the central holes of the first bevel gear shafts (4), so that the toothed shafts (3) can axially reciprocate relative to the first bevel gear shafts (4) to adjust the distance between the first bevel gear shafts (4) and the second bevel gear shafts (5), and the second bevel gear shafts (5) can synchronously rotate along with the first bevel gear shafts (4).

3. The thoracic constant pressure loading device as claimed in claim 2, wherein an adjusting mechanism is further provided under the driving mechanism, and comprises a base (22), a first sliding plate (19), a second sliding plate (20) and a lead screw; the base (22) is of a rectangular frame structure, two parallel through grooves are formed in the top surface of the base in the axial direction, the first sliding plate (19) and the second sliding plate (20) are symmetrically arranged on the base (22) and are in an inverted U shape, and two strip-shaped edges perpendicular to the base (22) are respectively arranged in the two through grooves, so that reciprocating motion on the base (22) along the sliding grooves is realized; the screw rod comprises a screw rod shaft (21a) and two rectangular nuts (21b), two sections of T-shaped threads with opposite rotation directions are respectively processed on the outer walls of two sides of the screw rod shaft (21a), the two rectangular nuts (21b) are respectively screwed on shaft sections processed with the T-shaped threads with different rotations, and the two rectangular nuts (21b) are respectively fixed on the bottom surfaces of the first sliding plate (19) and the second sliding plate (20), so that when the screw rod shaft (21) rotates in a certain direction, the first sliding plate (19) and the second sliding plate (20) can slide oppositely or oppositely; an axial through hole penetrating through the whole rectangular frame is formed in the side wall of one side of the base (22), the forming direction of the axial through hole is parallel to the forming direction of the sliding groove, a deep groove ball bearing is arranged in each axial through hole, the screw rod shaft (21) is rotatably arranged in the axial through hole of the base (22) in a penetrating mode, and two rectangular nuts (21b) located on the screw rod shaft (21) are located on the inner side of a frame of the rectangular frame; a first locking nut (23) is respectively arranged on the two sides of the screw shaft (21) and positioned on the outer side of the base (22) in a penetrating and threaded connection mode so as to limit the left and right movement of the screw shaft (21) on the base (22); a handle (24) is fixed at one end of the screw shaft (21).

4. The thoracic constant pressure loading apparatus as set forth in claim 1, wherein a protruding shaft is formed to extend upward from the top surface of the supporting member in the axial direction, and an end cap having an outer diameter larger than that of the protruding shaft is detachably fixed to a top end of the protruding shaft.

5. The thoracic constant pressure loading device of claim 4, wherein the force applying mechanism comprises a U-shaped plate (18), a rectangular block (16) with a circular arc plate and a limit plate (17); the U-shaped plate (18) is formed by integrally forming a transverse plate (18e) and two vertical plates (18d) of which the top edges are connected with the transverse plate (18e), a rectangular through hole (18a) is formed in the center of the transverse plate (18e), a rectangular flange (18c) is arranged on the bottom surface of the transverse plate (18e) and on the periphery of the rectangular through hole (18a), strip-shaped limiting holes (18b) are respectively formed in two sides of the rectangular through hole (18a), the aperture of each strip-shaped limiting hole (18b) is matched with the outer diameter of a convex shaft of each supporting member, and the convex shafts of the two supporting members are respectively arranged in the two strip-shaped limiting holes (18b) in a penetrating mode and can slide and move in the strip-shaped limiting holes (18b) along with the change of the distance between the first bevel gear shaft (4) and the second bevel gear shaft; the aperture of the strip-shaped limiting hole (18b) is smaller than the outer diameter of the end cover, so that the supporting member is limited on the U-shaped plate (18); the rectangular block (16) with the arc plate is composed of an arc plate with a concave top surface and a rectangular block fixed on the central line of the bottom surface of the arc plate, and the rectangular block is inserted in the rectangular through hole (18a) to ensure that the arc plate is pressed on the top surface of the U-shaped plate (18); the limit plate (17) is fixed on the rectangular flange (18c) and the rectangular block of the rectangular block (16) with the circular arc plate through screws.

6. The thoracic constant pressure loading device as claimed in claim 5, wherein a first rail plate (29) and a second rail plate (30) are respectively disposed on both sides of the U-shaped plate (18) in parallel with the vertical plate, the first rail plate (29) and the second rail plate (30) are respectively disposed in parallel and fixed on both sides of the base (22) by screws; equal vertical and symmetry are fixed with two bar guide rail (31) on the inboard face of first guide rail board (29) and second guide rail board (30), be fixed with the sliding block group that suits with bar guide rail (31) on two riser outside faces of U-shaped board (18), make every bar guide rail (31) correspond and set up in two piece at least spaced slider (32), through with first guide rail board (29) and second guide rail board (30) respectively with the riser swing joint that is located the U-shaped board of neighbour side, realize U-shaped board (18) and slide along the axial under the guide effect of first guide rail board (29) and second guide rail board (30) upwards.

7. The thoracic constant pressure loading apparatus as claimed in claim 6, wherein a reinforcing plate (33) is further provided between the first rail plate (29) and the second rail plate (30), and each reinforcing plate (33) is fixed to the first rail plate (29) and the second rail plate (30) by means of a screw.

8. The thoracic constant pressure loading device as claimed in claim 3, wherein the driving mechanism further includes a first frame (25) and a second frame (26); the first frame (25) is a rectangular frame consisting of two transverse plates arranged in parallel and two vertical plates fixed on two sides of the two transverse plates respectively, and is fixed on the first sliding plate (19); an axial through hole for penetrating and installing a first bevel gear (6) is formed in a transverse plate above the first frame (25), and two radial through holes for penetrating and installing a transmission shaft of the stepping motor and a first bevel gear shaft (4) are formed in the two vertical plates respectively; the stepping motor (1) is fixed on the outer side wall surface of the vertical plate; the second frame (26) is a frame consisting of two transverse plates arranged in parallel and a vertical plate fixed on one side of the two transverse plates, and is fixed on the second sliding plate (20) through screws; an axial through hole for penetrating the second bevel gear (7) is formed in a transverse plate above the second frame (26), a radial through hole for penetrating the second bevel gear shaft (5) is formed in a vertical plate, and a second locking nut (28) is arranged on a threaded part of the second bevel gear shaft (5) extending out of the second frame (26); and a deep groove ball bearing is arranged in each radial through hole and each axial through hole, so that the shaft element penetrating into the through holes can be rotatably arranged in each through hole.

9. The thoracic constant pressure loading device as claimed in claim 8, wherein a threaded section is formed in the middle of each of the two lifting shafts, and a sleeve and a third lock nut (27) are sleeved on each of the lifting shafts; wherein, the sleeve barrel is sleeved on the optical shaft section of the lifting shaft and is abutted against the bottom surface of the deep groove ball bearing positioned in the axial through hole of the frame, and a third locking nut (27) is in threaded connection with the upper threaded section of the lifting shaft and is press-fitted on the top end surface of the deep groove ball bearing positioned in the axial through hole of the frame.

10. The thoracic constant pressure loading device as claimed in claim 3, further comprising a fixing mechanism including two Z-shaped plates (34) fixed to the first sliding plate (19) and the second sliding plate (20), respectively, each Z-shaped plate (34) being composed of two horizontal plates and a vertical plate connected to the two horizontal plates; the two Z-shaped plates (34) are arranged in axial symmetry, so that the two Z-shaped plates are combined to form a U-shaped structure, and the transverse plate positioned above the U-shaped plate is positioned outside the device; a circular through hole (34a) which is adaptive to the outer diameter of the limbs of the experimental object is arranged at the center of the transverse plate above each Z-shaped plate (34).

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