Oral cavity dilator for animal husbandry

Abstract

The utility model belongs to the technical field of livestock breeding, particularly relates to an oral cavity dilator for livestock breeding, and aims to solve the problems that an existing dilator is low in dilating efficiency and not ideal in dilating effect, and the oral cavity dilator for livestock breeding comprises a lower jaw supporting plate, an upper jaw supporting plate, an adjustable U-shaped supporting pipe assembly, a dilating driving assembly and a scissor type movable supporting rod. The two groups of lower jaw supporting plates and upper jaw supporting plates are respectively clamped on two sides in the oral cavity of the livestock so as to support the upper jaw and the lower jaw of the livestock, and when the lower jaw supporting plates and the upper jaw supporting plates are propped open through the scissors type movable supporting rods, the opening shape of the oral cavity of the livestock can be better met, and the livestock oral cavity can be more conveniently supported. A better opening effect can be achieved; the distraction driving assembly can generate two power output ends through one power input end, then the distraction driving assembly can distraction the lower jaw supporting plate and the upper jaw supporting plate at the same time, the distraction efficiency is improved, and it can be ensured that the two sides of the oral cavity of the livestock are distraction at the same speed and the same amplitude.

Description

Technical Field

[0001] The utility model relates to an oral splint, in particular to an oral splint for animal husbandry, and belongs to the technical field of animal husbandry. Background Art

[0002] In animal husbandry, livestock may occasionally need treatment due to oral injuries caused by ingesting foreign objects and infection. At the same time, when treating sick animals, the animal's mouth needs to be opened to feed medicine, or the infected part of the mouth needs to be treated. However, when the veterinarian examines the livestock's mouth or feeds medicine, the livestock will not actively open their mouths to cooperate with the veterinarian's examination or feeding, so auxiliary opening equipment is needed to open the livestock's mouth.

[0003] In the prior art, a livestock oral retractor disclosed in Publication No. CN219375051U includes two support bases. A clamping structure is mounted on the side of the two support bases facing away from each other, for clamping the livestock's mouth. A movable structure is mounted on the side of the two support bases facing toward each other, for driving the clamping structure to move. A lifting structure is mounted on one side of each support base, for driving the two support bases toward or away from each other. A limiting structure is mounted on the side of the two support bases facing away from each other, for restraining the livestock's teeth. The livestock's mouth is opened by rotating the first screw and the second screw, which improves the reliability and efficiency of the device. However, in actual use, the livestock's mouth is not opened in a parallel manner up and down when opened, and the two support seats of the existing opener are parallel to or far away from each other, that is, the existing opener opens the livestock's mouth in a parallel manner, which cannot well fit the opening angle of the livestock's mouth, resulting in an actual opening effect that is not ideal. Secondly, during the opening process, the two screws need to be rotated separately to achieve the opening of the livestock's mouth, so it is impossible to ensure that the two sides of the livestock's mouth are opened synchronously and with the same amplitude. Not only is the opening efficiency low, but there is also a possibility of unsatisfactory opening effect. Utility Model Content

[0004] The utility model provides an oral cavity spreader for animal husbandry in order to solve the problems that the existing spreader has low spreading efficiency and unsatisfactory spreading effect.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions: a mouth opener for livestock, comprising a mandibular support plate, a maxillary support plate and an adjustable U-shaped support tube assembly, wherein the tail ends of the mandibular support plate are respectively connected to the two ends of the adjustable U-shaped support tube assembly, the maxillary support plate is stacked and assembled above the mandibular support plate, a scissor-type movable support rod is connected between the mandibular support plate and the maxillary support plate, and a spreading drive assembly is provided in the adjustable U-shaped support tube assembly;

[0006] The scissor-type movable support rod comprises two rotatably connected support rods, and the cross-jointed portion of the two support rods of the scissor-type movable support rod is close to the front end of the mandibular support plate;

[0007] The expansion drive assembly includes a driving force input end and two driving force output ends. The driving force input end of the expansion drive assembly is located at the horizontal tube body of the adjustable U-shaped support tube assembly, and the driving force output ends of the expansion drive assembly are respectively located at the upper ends of the vertical tube bodies of the adjustable U-shaped support tube assembly.

[0008] As a further solution of the present invention: the lower plate surface of the mandibular support plate is connected to the mandibular bite pad, the upper plate surface of the mandibular support plate is provided with a lower movable cavity, the upper plate surface of the maxillary support plate is connected to the maxillary bite pad, the lower plate surface of the maxillary support plate is provided with an upper movable cavity, and the lower movable cavity and the upper movable cavity are docked and combined together, and scissor-type movable support rods are arranged in the lower movable cavity and the upper movable cavity.

[0009] As a further solution of the present invention: the front ends of the two struts constituting the scissor-type movable struts are connected with a rotating shaft, the front end cavity wall of the lower movable cavity is provided with a lower end limiting groove, and the front end cavity wall of the upper movable cavity is provided with an upper end limiting groove, the rotating shaft connected to one of the struts is rotatably connected in the lower end limiting groove, and the rotating shaft connected to the other strut is rotatably connected in the upper end limiting groove.

[0010] As a further solution of the present invention: the tail end of one of the struts constituting the scissor-type movable struts is rotatably connected to a slider, the mandibular support plate is provided with a slider moving cavity, the slider moving cavity is connected to the lower outer end of the lower movable cavity, the slider is slidably arranged in the slider moving cavity, and a threaded rod is rotatably connected in the slider moving cavity, and the rod body of the threaded rod is threaded through the slider.

[0011] As a further solution of the present invention: the tail end of another strut constituting the scissor-type movable strut is also connected to a rotating shaft, the rear end cavity wall of the upper movable cavity is provided with an upper end limiting slide groove, and the movable card in the upper end limiting slide groove is connected to the rotating shaft.

[0012] As a further solution of the present invention: the adjustable U-shaped support tube assembly includes a hollow outer sleeve, a hollow inner sleeve and two hollow support tubes, one of which is connected to the hollow outer sleeve in an L-shape, and the other is connected to the hollow inner sleeve in an L-shape. The tube body of the hollow inner sleeve is movably inserted in the hollow outer sleeve, and the tube wall of the hollow outer sleeve is threaded with a positioning bolt knob, and the positioning bolt knob is located at the insertion and socketing position of the hollow inner sleeve and the hollow outer sleeve.

[0013] As a further solution of the present invention: a gear docking cavity is also opened in the mandibular support plate, and a connecting rod is movably passed through the gear docking cavity and the slider moving cavity, one end of the connecting rod is fixedly connected to the threaded rod coaxially, and the end of the connecting rod located in the gear docking cavity is coaxially fixedly connected to a bevel transmission gear, and the driving force output end of the support drive assembly includes a power output rotating rod, the rod body of the power output rotating rod is provided with a bearing, the rod body of the power output rotating rod is placed in a hollow support tube, and the rod body of the power output rotating rod is rotatably connected to the cavity of the hollow support tube through the bearing, the upper end of the power output rotating rod is coaxially fixedly connected to the bevel transmission gear, the upper end of the power output rotating rod is located in the gear docking cavity, and the two bevel transmission gears in the gear docking cavity are meshed and connected.

[0014] As a further solution of the present invention: the driving force input end of the expansion drive assembly includes a forward drive rotating rod, a reverse drive rotating rod and a docking rotating rod, and the rod bodies of the forward drive rotating rod, the reverse drive rotating rod and the docking rotating rod are all sleeved with bearings, the rod bodies of the forward drive rotating rod and the reverse drive rotating rod are placed in the hollow outer sleeve, and the rod bodies of the forward drive rotating rod and the reverse drive rotating rod are rotatably connected to the cavity of the hollow outer sleeve through the bearings, the rod body of the docking rotating rod is placed in the hollow inner sleeve, and the rod body of the docking rotating rod is rotatably connected to the cavity of the hollow inner sleeve through the bearings, the opposite ends of the forward drive rotating rod and one of the power output rotating rods are coaxially fixed with a conical transmission gear, and the opposite ends of the forward drive rotating rod and one of the power output rotating rods are connected The two connected bevel transmission gears are meshedly connected, and the opposite ends of the docking rotating rod and the other power output rotating rod are coaxially fixed with a bevel transmission gear, and the two bevel transmission gears connected to the opposite ends of the docking rotating rod and the other power output rotating rod are meshedly connected, and the other end of the docking rotating rod is limited and inserted together with the reverse drive rotating rod, and the opposite ends of the forward drive rotating rod and the reverse drive rotating rod are coaxially fixed with a bevel transmission gear, and a bevel driving gear is also provided between the opposite ends of the forward drive rotating rod and the reverse drive rotating rod, and the bevel driving gears are respectively meshed with the bevel transmission gears on both sides, and the tube wall of the hollow outer sleeve is rotatably connected with a spread knob, and the end of the spread knob located in the hollow outer sleeve is fixedly connected to the conical driving gear coaxially.

[0015] As a further solution of the present invention: a docking cavity is opened in the rod of the reverse drive rotating rod, and the docking rotating rod is inserted in the docking cavity, the cavity wall of the docking cavity is connected to the limiting block, the rod body of the docking rotating rod is opened with a limiting groove, and the limiting block is clamped in the limiting groove.

[0016] The beneficial effects of the utility model are:

[0017] 1. The utility model is provided with a mandibular support plate, a maxillary support plate and an adjustable U-shaped support tube assembly. When in use, the two sets of mandibular support plates and the maxillary support plates are respectively clamped on both sides of the livestock's mouth to support the upper and lower jaws of the livestock. Then, the opening drive assembly drives the scissor-type movable support rod to rotate, so that the mandibular support plate and the maxillary support plate are separated, that is, the livestock's mouth can be opened. The adjustable U-shaped support tube assembly can be adjusted in width, so that it can be used for livestock with different mouth sizes, thereby improving the applicability of the opener;

[0018] 2. The scissor-type movable struts provided in the present invention include two rotatably connected struts, and the cross-jointed portion of the two struts of the scissor-type movable struts is close to the front end of the mandibular support plate. When the cross-shaped scissor-type movable struts are opened, the cross-jointed portion is close to the front end of the mandibular support plate, thereby forming an opening shape with a smaller opening range at the front end and a larger opening range at the rear end. That is, when the mandibular support plate and the maxillary support plate are opened, they can better conform to the shape of the opening of the livestock's mouth, thus achieving a better opening effect.

[0019] 3. The expansion drive assembly provided in the present invention includes a driving force input end and two driving force output ends. The driving force input end of the expansion drive assembly is located at the horizontal tube body of the adjustable U-shaped support tube assembly, and the driving force output ends of the expansion drive assembly are respectively located at the upper ends of the vertical tube bodies of the adjustable U-shaped support tube assembly, that is, two power output ends can be generated through one power input end, and then the expansion drive assembly can expand the two sets of mandibular support plates and maxillary support plates at the same time, which can improve the expansion efficiency and ensure that the expansion operations on both sides of the livestock's mouth are performed at the same speed and amplitude. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the side cross-sectional structure of the mandibular support plate and the maxillary support plate of the present invention;

[0022] Figure 3 This is a schematic diagram of the cross-sectional structure of the mandibular support plate of the present invention;

[0023] Figure 4 This is a schematic diagram of the cross-sectional structure of the maxillary support plate of the present invention;

[0024] Figure 5 This is a schematic diagram of the cross-sectional structure of the expansion drive assembly of the present invention;

[0025] Figure 6 This is a schematic diagram of the cross-sectional structure of the hollow support tube and the hollow outer sleeve of the utility model;

[0026] Figure 7 This is a schematic diagram of the cross-sectional structure of the hollow support tube and the hollow inner sleeve of the utility model;

[0027] Figure 8 This is a schematic diagram of the structure of the reverse driving rotating rod and the docking rotating rod in the separated state of the utility model;

[0028] Figure 9 This is a schematic diagram of the scissor-type movable support rod structure of the utility model.

[0029] In the figure: 1. mandibular support plate, 11. mandibular bite pad, 12. lower movable cavity, 13. slider moving cavity, 14. gear docking cavity, 15. lower end limiting groove, 2. maxillary support plate, 21. maxillary bite pad, 22. upper movable cavity, 23. upper end limiting groove, 24. upper end limiting slide groove, 3. hollow support tube, 31. hollow outer sleeve, 32. hollow inner sleeve, 33. positioning bolt knob, 34. opening knob, 35. power output rotating rod, 36. forward drive rotating rod, 37. reverse drive rotating rod, 38. docking rotating rod, 39. docking cavity, 310. limiting block, 311. limiting groove, 4. scissor-type movable support rod, 41. slider, 42. threaded rod, 43. connecting rod, 44. rotating shaft, 5. bearing, 6. conical transmission gear, 7. conical driving gear. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] Example 1

[0032] like Figure 1 、 Figure 2 and Figure 9The U-shaped support tube assembly is a kind of oral opener for livestock, which includes a mandibular support plate 1, an upper mandibular support plate 2 and an adjustable U-shaped support tube assembly. The tail ends of the mandibular support plate 1 are respectively connected to the two ends of the adjustable U-shaped support tube assembly, and the upper mandibular support plate 2 is stacked and assembled above the mandibular support plate 1. A scissor-type movable support rod 4 is connected between the mandibular support plate 1 and the upper mandibular support plate 2. A spreading drive assembly is provided in the adjustable U-shaped support tube assembly. When in use, the two groups of mandibular support plates 1 and the upper mandibular support plates 2 are respectively clamped on both sides of the livestock's mouth to support the upper and lower jaws of the livestock. Then, the scissor-type movable support rod 4 is driven by the spreading drive assembly to rotate so that the mandibular support plate 1 and the upper mandibular support plate 2 are separated, that is, the livestock's mouth can be spread. The adjustable U-shaped support tube assembly can be adjusted in width, so that it can be used for livestock with different mouth sizes, thereby improving the applicability of the spreader.

[0033] The scissor-type movable strut 4 includes two rotatably connected struts, and the cross-jointed portion of the two struts of the scissor-type movable strut 4 is close to the front end of the mandibular support plate 1, so that when the cross-shaped scissor-type movable strut 4 is opened, the cross-jointed portion is close to the front end of the mandibular support plate 1, thereby forming an opening shape with a smaller opening amplitude at the front end and a larger opening amplitude at the rear end. That is, when the mandibular support plate 1 and the maxillary support plate 2 are opened, they can better conform to the shape of the opening of the livestock's mouth, that is, they can achieve a better opening effect.

[0034] The expansion drive assembly includes a driving force input end and two driving force output ends. The driving force input end of the expansion drive assembly is located at the horizontal tube body of the adjustable U-shaped support tube assembly, and the driving force output ends of the expansion drive assembly are respectively located at the upper ends of the vertical tube bodies of the adjustable U-shaped support tube assembly, that is, two power output ends can be generated through one power input end, so that the expansion drive assembly can simultaneously expand the two sets of mandibular support plates 1 and maxillary support plates 2, which can improve the expansion efficiency and ensure that the expansion operations on both sides of the livestock's mouth are performed at the same speed and amplitude.

[0035] Example 2

[0036] Improvements based on Example 1:

[0037] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 9As shown, the lower plate surface of the mandibular support plate 1 is connected to the mandibular bite pad 11, the upper plate surface of the mandibular support plate 1 is provided with a lower movable cavity 12, the upper plate surface of the maxillary support plate 2 is connected to the maxillary bite pad 21, the lower plate surface of the maxillary support plate 2 is provided with an upper movable cavity 22, and the lower movable cavity 12 and the upper movable cavity 22 are docked and combined together, and scissor-type movable struts 4 are arranged in the lower movable cavity 12 and the upper movable cavity 22, which can be respectively placed on the upper and lower jaws of the livestock through the provided maxillary bite pad 21 and the mandibular bite pad 11, and then when the livestock's mouth is stretched, the discomfort of the livestock can be reduced by the soft characteristics of the bite pad, and the opened lower movable cavity 12 and the upper movable cavity 22 can be used to provide movable space for the scissor-type movable strut 4, thereby ensuring that the mandibular support plate 1 and the maxillary support plate 2 can be tightly attached to each other when not stretched, so as to facilitate the stretcher to be inserted into the livestock's mouth.

[0038] Furthermore, the front ends of the two struts constituting the scissor-type movable strut 4 are connected with a rotating shaft 44, the front end cavity wall of the lower movable cavity 12 is provided with a lower end limiting groove 15, and the front end cavity wall of the upper movable cavity 22 is provided with an upper end limiting groove 23. The rotating shaft 44 connected to one of the struts is rotatably connected in the lower end limiting groove 15, and the rotating shaft 44 connected to the other strut is rotatably connected in the upper end limiting groove 23. This can realize the limiting placement of the front ends of the two struts of the scissor-type movable strut 4, and then, when the scissor-type movable strut 4 is stretched open, the rotation of the rotating shaft 44 in the limiting groove can drive the strut to tilt to different degrees, and can enable the scissor-type movable strut 4 to provide stable support for the front ends of the lower movable cavity 12 and the upper movable cavity 22.

[0039] Furthermore, the tail end of one of the struts constituting the scissor-type movable struts 4 is rotatably connected to a slider 41, and the mandibular support plate 1 is provided with a slider moving cavity 13, which is connected to the lower outer end of the lower movable cavity 12, and the slider 41 is slidably arranged in the slider moving cavity 13, and a threaded rod 42 is rotatably connected in the slider moving cavity 13, and the rod thread of the threaded rod 42 passes through the slider 41, so that the rotation of the threaded rod 42 can drive the slider 41 to move in the slider moving cavity 13, so as to push one of the struts of the scissor-type movable struts 4 to move and tilt at an angle, that is, it can drive the scissor-type movable struts 4 to open or close, thereby realizing the opening function or retraction function of the spreader.

[0040] Furthermore, the tail end of the other strut constituting the scissor-type movable strut 4 is also connected to a rotating shaft 44, and the rear end cavity wall of the upper movable cavity 22 is provided with an upper end limiting slide groove 24, and the upper end limiting slide groove 24 is movably connected to the rotating shaft 44, so that when one of the struts of the scissor-type movable strut 4 is driven by the slider 41 to move and tilt at an angle, the other strut will also have a tendency to move and tilt at an angle, and the tail end of the other strut is limited by the upper end limiting slide groove 24 to ensure that the tail ends of the two struts keep moving in sync, thereby realizing a stable opening or closing action of the scissor-type movable strut 4.

[0041] like Figures 1 to 8 As shown, the adjustable U-shaped support tube assembly includes a hollow outer sleeve 31, a hollow inner sleeve 32 and two hollow support tubes 3, one of the hollow support tube 3 is connected to the hollow outer sleeve 31 in an L-shape, and the other hollow support tube 3 is connected to the hollow inner sleeve 32 in an L-shape. The tube body of the hollow inner sleeve 32 is movably inserted in the hollow outer sleeve 31, and the tube wall of the hollow outer sleeve 31 is threadedly connected with a positioning bolt knob 33, and the positioning bolt knob 33 is located at the insertion and socketing position of the hollow inner sleeve 32 and the hollow outer sleeve 31, so that the distance between the two hollow support tubes 3 can be adjusted through the movably socketed connection between the hollow support tube 3 and the hollow inner sleeve 32, and the socketing position of the hollow support tube 3 and the hollow inner sleeve 32 can be fixed by tightening the positioning bolt knob 33, that is, it can be adjusted accordingly according to the mouth size of different livestock, and can meet the use of different livestock.

[0042] Furthermore, a gear docking cavity 14 is also provided in the mandibular support plate 1, and a connecting rod 43 is movably passed through the gear docking cavity 14 and the slider moving cavity 13, one end of the connecting rod 43 is fixedly connected to the threaded rod 42 coaxially, and one end of the connecting rod 43 located in the gear docking cavity 14 is coaxially fixedly connected to a conical transmission gear 6, and the driving force output end of the support drive assembly includes a power output rotating rod 35, and the rod body of the power output rotating rod 35 is provided with a bearing 5, and the rod body of the power output rotating rod 35 is placed in the hollow support tube 3 , and the rod body of the power output rotating rod 35 is rotatably connected to the cavity of the hollow support tube 3 through the bearing 5. The upper end of the power output rotating rod 35 is coaxially fixedly connected with a bevel transmission gear 6. The upper end of the power output rotating rod 35 is located in the gear docking cavity 14, and the two bevel transmission gears 6 in the gear docking cavity 14 are meshed and connected, which can make the driving force output end of the support drive assembly drive the connecting rod 43 to rotate, and then drive the threaded rod 42 to rotate, that is, it can realize the opening and closing action of the scissors-type movable support rod 4.

[0043] Furthermore, the driving force input end of the expansion drive assembly includes a forward driving rod 36, a reverse driving rod 37 and a docking rod 38, and the rod bodies of the forward driving rod 36, the reverse driving rod 37 and the docking rod 38 are all provided with bearings 5, and the rod bodies of the forward driving rod 36 and the reverse driving rod 37 are placed in the hollow outer sleeve 31, and the rod bodies of the forward driving rod 36 and the reverse driving rod 37 are rotatably connected to the cavity of the hollow outer sleeve 31 through the bearing 5, and the rod body of the docking rod 38 is placed in the hollow The rod body of the docking rotating rod 38 is rotatably connected to the cavity of the hollow inner sleeve 32 through the bearing 5. The opposite ends of the forward driving rotating rod 36 and one of the power output rotating rods 35 are coaxially fixed with a bevel transmission gear 6, and the two bevel transmission gears 6 connected to the opposite ends of the forward driving rotating rod 36 and one of the power output rotating rods 35 are meshedly connected. The opposite ends of the docking rotating rod 38 and the other power output rotating rod 35 are coaxially fixed with a bevel transmission gear 6, and the docking rotating rod 38 and The two bevel transmission gears 6 connected to the opposite ends of the other power output rotating rod 35 are meshed and connected, and the other end of the docking rotating rod 38 is limited and inserted together with the reverse driving rotating rod 37. The opposite ends of the forward driving rotating rod 36 and the reverse driving rotating rod 37 are coaxially fixed with a bevel transmission gear 6. A bevel driving gear 7 is also provided between the opposite ends of the forward driving rotating rod 36 and the reverse driving rotating rod 37. The bevel driving gear 7 is respectively meshed and connected with the bevel transmission gears 6 on both sides, and the wall of the hollow outer sleeve 31 is rotated. It is connected to a spreading knob 34, and one end of the spreading knob 34 located in the hollow outer sleeve 31 is fixedly connected to the conical driving gear 7 coaxially, so that the spreading knob 34 can drive the conical driving gear 7 to rotate, and then drive the forward driving rod 36 and the reverse driving rod 37 to rotate in opposite directions through gear transmission, and further drive the two power output rods 35 to rotate in the same direction through gear transmission, that is, it can drive the two threaded rods 42 to rotate synchronously, so that the two sets of mandibular support plates 1 and maxillary support plates 2 can be spread at the same time.

[0044] Furthermore, a docking cavity 39 is provided in the rod of the reverse drive rotating rod 37, and the docking rotating rod 38 is inserted in the docking cavity 39. The cavity wall of the docking cavity 39 is connected to the limiting block 310, and the rod body of the docking rotating rod 38 is provided with a limiting groove 311. The limiting block 310 is clamped in the limiting groove 311. When the position of the hollow outer sleeve 31 and the hollow inner sleeve 32 is adjusted, the position of the docking rotating rod 38 inserted in the docking cavity 39 opened by the reverse drive rotating rod 37 is also adjusted accordingly, that is, to avoid motion interference. At the same time, due to the limiting cooperation between the limiting block 310 and the limiting groove 311, the docking rotating rod 38 can rotate synchronously with the reverse drive rotating rod 37.

[0045] Working principle: by clamping two sets of mandibular support plates 1 and maxillary support plates 2 on both sides of the livestock's mouth, the upper and lower jaws of the livestock can be supported. Then, the scissor-type movable support rod 4 is driven to rotate by the expansion drive component, and the cone driving gear 7 is driven to rotate by the expansion knob 34. Then, the forward driving rod 36 and the reverse driving rod 37 are driven to rotate in opposite directions through the gear transmission. Further, the two power output rods 35 are driven to rotate in the same direction through the gear transmission, so that the two threaded rods 42 can be driven to rotate synchronously. This is to achieve that the two groups of mandibular support plates 1 and maxillary support plates 2 can be opened at the same time, that is, the livestock mouth can be opened, and the adjustable U-shaped support tube assembly can be adjusted in width. Through the movable socket connection between the hollow support tube 3 and the hollow inner sleeve 32, the distance between the two hollow support tubes 3 can be adjusted, and the socket connection between the hollow support tube 3 and the hollow inner sleeve 32 can be fixed by tightening the positioning bolt knob 33, that is, it can be adjusted accordingly according to the mouth size of different livestock, and can meet the use of different livestock.

[0046] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0047] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A mouth opener for livestock, comprising a mandibular support plate (1), a maxillary support plate (2) and an adjustable U-shaped support tube assembly, characterized in that: The tail ends of the mandibular support plate (1) are respectively connected to the two ends of the adjustable U-shaped support tube assembly, the maxillary support plate (2) is stacked and assembled above the mandibular support plate (1), a scissor-type movable support rod (4) is connected between the mandibular support plate (1) and the maxillary support plate (2), and a support drive assembly is provided in the adjustable U-shaped support tube assembly; The scissor-type movable support rod (4) comprises two rotatably connected support rods, and the cross-jointed portion of the two support rods of the scissor-type movable support rod (4) is close to the front end of the mandibular support plate (1); The expansion drive assembly includes a driving force input end and two driving force output ends. The driving force input end of the expansion drive assembly is located at the horizontal tube body of the adjustable U-shaped support tube assembly, and the driving force output ends of the expansion drive assembly are respectively located at the upper ends of the vertical tube bodies of the adjustable U-shaped support tube assembly.

2. The oral retractor for livestock according to claim 1, characterized in that: The lower plate surface of the mandibular support plate (1) is connected to the mandibular bite pad (11), the upper plate surface of the mandibular support plate (1) is provided with a lower movable cavity (12), the upper plate surface of the maxillary support plate (2) is connected to the maxillary bite pad (21), the lower plate surface of the maxillary support plate (2) is provided with an upper movable cavity (22), and the lower movable cavity (12) and the upper movable cavity (22) are docked and combined together, and scissor-type movable support rods (4) are arranged in the lower movable cavity (12) and the upper movable cavity (22).

3. The oral retractor for livestock according to claim 2, characterized in that: The front ends of the two struts constituting the scissor-type movable struts (4) are connected to a rotating shaft (44); the front end cavity wall of the lower movable chamber (12) is provided with a lower end limiting groove (15); the front end cavity wall of the upper movable chamber (22) is provided with an upper end limiting groove (23); the rotating shaft (44) connected to one of the struts is rotatably connected in the lower end limiting groove (15); and the rotating shaft (44) connected to the other strut is rotatably connected in the upper end limiting groove (23).

4. The oral retractor for livestock according to claim 3, characterized in that: The tail end of one of the struts constituting the scissor-type movable struts (4) is rotatably connected to a slider (41), the mandibular support plate (1) is provided with a slider moving cavity (13), the slider moving cavity (13) is connected to the lower end of the lower movable cavity (12), the slider (41) is slidably arranged in the slider moving cavity (13), and a threaded rod (42) is rotatably connected in the slider moving cavity (13), and the rod body of the threaded rod (42) is threadedly passed through the slider (41).

5. The oral retractor for livestock according to claim 4, characterized in that: The tail end of another strut constituting the scissor-type movable strut (4) is also connected to a rotating shaft (44), and the rear end cavity wall of the upper movable cavity (22) is provided with an upper end limiting sliding groove (24), and a movable clamp in the upper end limiting sliding groove (24) is connected to the rotating shaft (44).

6. The oral retractor for livestock according to claim 5, characterized in that: The adjustable U-shaped support tube assembly comprises a hollow outer sleeve (31), a hollow inner sleeve (32) and two hollow support tubes (3), wherein one of the hollow support tubes (3) is connected to the hollow outer sleeve (31) in an L-shaped integral manner, and the other hollow support tube (3) is connected to the hollow inner sleeve (32) in an L-shaped integral manner, the tube body of the hollow inner sleeve (32) is movably inserted into the hollow outer sleeve (31), and a positioning bolt knob (33) is threadedly connected to the tube wall of the hollow outer sleeve (31), and the positioning bolt knob (33) is located at the insertion and sleeve connection portion between the hollow inner sleeve (32) and the hollow outer sleeve (31).

7. The oral retractor for livestock according to claim 6, characterized in that: A gear docking cavity (14) is further provided in the mandibular support plate (1), a connecting rod (43) is movably passed through the gear docking cavity (14) and the slider moving cavity (13), one end of the connecting rod (43) is fixedly connected to the threaded rod (42) coaxially, and one end of the connecting rod (43) located in the gear docking cavity (14) is fixedly connected to a conical transmission gear (6) coaxially, and the driving force output end of the expansion drive assembly includes a power output rotating rod (35), and the power output rotating rod (35) The shaft of the power output rotating rod (35) is provided with a bearing (5), the shaft of the power output rotating rod (35) is arranged in the hollow support tube (3), and the shaft of the power output rotating rod (35) is rotatably connected to the cavity of the hollow support tube (3) through the bearing (5), the upper end of the power output rotating rod (35) is coaxially fixedly connected to a bevel transmission gear (6), the upper end of the power output rotating rod (35) is located in the gear docking cavity (14), and the two bevel transmission gears (6) in the gear docking cavity (14) are meshed and connected.

8. The oral retractor for livestock according to claim 7, characterized in that: The driving force input end of the expansion drive assembly includes a forward driving rod (36), a reverse driving rod (37) and a docking rod (38), the rod bodies of the forward driving rod (36), the reverse driving rod (37) and the docking rod (38) are all sleeved with bearings (5), the rod bodies of the forward driving rod (36) and the reverse driving rod (37) are arranged in the hollow outer sleeve (31), and the rod bodies of the forward driving rod (36) and the reverse driving rod (37) are connected to the hollow outer sleeve (31) through the bearings (5). The cavity of the hollow outer sleeve (31) is rotatably connected, the rod body of the docking rotating rod (38) is placed in the hollow inner sleeve (32), and the rod body of the docking rotating rod (38) is rotatably connected to the cavity of the hollow inner sleeve (32) through a bearing (5), the opposite ends of the forward driving rotating rod (36) and one of the power output rotating rods (35) are both coaxially fixed with a conical transmission gear (6), and the opposite ends of the forward driving rotating rod (36) and one of the power output rotating rods (35) are connected The two conical transmission gears (6) are meshed and connected. The opposite ends of the docking rotating rod (38) and the other power output rotating rod (35) are both coaxially fixed with the conical transmission gear (6). The two conical transmission gears (6) connected to the opposite ends of the docking rotating rod (38) and the other power output rotating rod (35) are meshed and connected. The other end of the docking rotating rod (38) is limitedly inserted together with the reverse driving rotating rod (37). The forward driving rotating rod (36) and the reverse driving rotating rod (37) are fixedly connected. The opposite ends of the hollow outer sleeve (31) are coaxially fixed with a conical transmission gear (6), and a conical driving gear (7) is further provided between the opposite ends of the forward driving rod (36) and the reverse driving rod (37). The conical driving gear (7) is respectively engaged with the conical transmission gears (6) on both sides. The wall of the hollow outer sleeve (31) is rotatably connected to a spreading knob (34), and one end of the spreading knob (34) located in the hollow outer sleeve (31) is coaxially fixedly connected to the conical driving gear (7).

9. The oral retractor for livestock according to claim 8, characterized in that: A docking cavity (39) is provided in the rod of the reverse driving rotating rod (37), and the docking rotating rod (38) is inserted in the docking cavity (39). The cavity wall of the docking cavity (39) is connected to a limiting block (310). A limiting groove (311) is provided on the rod body of the docking rotating rod (38), and the limiting block (310) is clamped in the limiting groove (311).

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