Sampling machine

Abstract

The utility model discloses a sampling machine which comprises a horizontally arranged walking rail, a sampling trolley erected on the top of the walking rail, a sampling rotating mechanism fixedly arranged on the top of the sampling trolley, a rotating support fixedly arranged on the top of the sampling rotating mechanism, a sampling arm hinged to the top of the rotating support and a sampling rod hinged to the lower portion of the top end of the sampling arm. An electric cylinder is hinged to the bottom of the rotary bracket; the other end of the electric cylinder is hinged to the bottom of the middle section of the sampling arm; the sampling trolley can horizontally move along the walking rail, the rotating support can freely rotate around the vertical axis, the electric cylinder stretches or retracts to enable the sampling arm to correspondingly swing upwards or downwards, and the sampling rod keeps in the vertical state and synchronously ascends and descends along with the top end of the sampling arm. According to the utility model, the grooved wheels and the slotless wheels are arranged, so that the walking rail on one side is embedded in the wheel grooves of the grooved wheels, the wheel form of single-side guiding and limiting and synchronous following on the other side is realized, the workload of manufacturing, assembling and debugging can be reduced, and the use cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sampling machines, in particular to a sampling machine. Background Art

[0002] A sampling machine is a device used in the grain industry. It can pick grain samples from a grain pile through a picking rod to facilitate subsequent physical and chemical property testing of the grain samples. Common types of sampling machines include cantilever rotating structures, gantry structures, and guide rail structures. Limited by the vehicle structure, sampling is mostly done in the vertical direction.

[0003] Among them, the rail-type sampling machine has a wider range of applications because it can travel long distances and can easily perform sampling operations on different positions of the cargo box. The existing rail-type sampling machine is generally provided with a crossbeam and a trolley. The trolley is arranged on the crossbeam, and a rack is generally arranged on the crossbeam. The movement of the trolley on the crossbeam is achieved through the cooperation of the trolley and the rack, and the sampling action is completed by rotating the cantilever connected to the trolley.

[0004] In order to enable the trolley to move and position smoothly on the crossbeam, upper and lower rollers are usually arranged on both sides of the inner wall of the vehicle body. The upper and lower rollers are in rolling contact with the upper and lower surfaces of the crossbeam respectively, so that the trolley can move forward or backward on the crossbeam, and multiple groups of lateral rollers are arranged on both sides of the inner wall of the vehicle body to achieve the guiding and limiting of the vehicle body on both sides of the crossbeam. For example, a grain sampling machine with a changing array structure disclosed in the Chinese utility model patent with announcement number CN218411707U and a grain sampling system disclosed in the Chinese invention patent with announcement number CN116358935A all use this roller method. However, since the spacing between the lateral rollers on both sides is often fixed, the two crossbeams of the guide rail need to have good parallelism. For guide rails with slightly changed width and curved sections, the lateral rollers of this structure cannot automatically adapt to the walking needs of unequal displacement on both sides; if the roller shaft of the lateral roller adopts an axial floating structure, although it can adapt to the change of the guide rail width, it is not easy to guarantee the guiding and limiting performance of the vehicle body. Since the overall travel of the guide rail of the guide rail type sampling machine is relatively long, it is often used in the form of splicing multiple straight or arc-shaped guide rail sections. Therefore, it is easy to achieve that the upper and lower surfaces of the two guide rail sections after splicing are located in the same plane, but it is not easy to ensure that the side surfaces on both sides are also located in the same plane. At the same time, since the distance between the lateral rollers on both sides is fixed and located between the vehicle body and the side of the crossbeam, its installation and disassembly and replacement operations are inconvenient, and it is often necessary to load and unload the lateral rollers outside the crossbeam or at the end of the crossbeam. Utility Model Content

[0005] The utility model provides a sampling machine, by arranging grooved wheels on the inner wall of one side of a movable frame plate and grooveless wheels on the inner wall of the other side, each group of grooved wheels and each group of grooveless wheels are two symmetrically arranged up and down, so that the top surface and the bottom surface of a running rail on one side are respectively embedded in the wheel grooves of the upper and lower two grooved wheels, and at the same time, a rolling engagement method is adopted to realize lateral guidance and limitation of the vehicle body on the running rail, and the grooveless wheel on the other side only rolls with the top surface and the bottom surface of the running rail on the other side, and there is no strict requirement on the distance or parallelism between the two outer side surfaces of the running rail.

[0006] In order to solve the above technical problems, a technical solution adopted by the utility model is:

[0007] A sampling machine comprises a horizontally arranged running rail, a sampling trolley mounted on the top of the running rail, a sampling rotating mechanism fixedly arranged on the top of the sampling trolley, a rotating bracket fixedly arranged on the top of the sampling rotating mechanism, a sampling arm hinged on the top of the rotating bracket, and a sampling rod hinged below the top of the sampling arm, wherein an electric cylinder is hinged at the bottom of the rotating bracket, and the other end of the electric cylinder is hinged to the bottom of the middle section of the sampling arm;

[0008] The sampling trolley can move horizontally along the running rail, the rotating bracket can rotate freely around the vertical axis, the extension / contraction of the electric cylinder causes the sampling arm to swing upward / downward accordingly, and the sampling rod keeps a vertical state and rises and falls synchronously with the top of the sampling arm.

[0009] Furthermore, the sampling trolley includes a moving frame, walking wheels rotatably installed on the inner walls on both sides of the moving frame and rollingly cooperating with the walking rails, and a walking rack fixedly connected to the outer surface of the walking rail and horizontally arranged. A walking motor is fixedly installed on the top of one side wall of the moving frame, and the output shaft end of the walking motor is fixedly connected to a walking gear meshing with the walking rack.

[0010] Furthermore, the traveling wheels include at least two groups of grooved wheels arranged on the inner wall of one side of the moving frame and at least two groups of grooveless wheels arranged on the inner wall of the other side of the moving frame, each group of grooved wheels and each group of grooveless wheels are two symmetrically arranged up and down, and the top surface and bottom surface of the traveling rail on one side are respectively embedded in the wheel grooves of the upper and lower two grooved wheels.

[0011] Furthermore, the sampling rotation mechanism includes a rotating motor bracket fixedly connected to the top surface of the movable frame plate, a rotating motor fixedly installed on the rotating motor bracket, a cylindrical gear fixedly connected to the output shaft end of the rotating motor, and a rotating inner gear ring located on the outside of the cylindrical gear and meshingly connected to the inside of the cylindrical gear. A rotating outer ring coaxially fixedly arranged on the outside of the rotating inner gear ring is fixedly connected to the top surface of the movable frame plate, and the rotating inner gear ring and the rotating outer ring are in sliding fit.

[0012] Furthermore, a ball rolling track is provided on the outer circumferential wall of the rotating inner gear ring and the inner circumferential wall of the rotating outer ring, and a plurality of evenly distributed steel balls are arranged in the ball rolling track.

[0013] Furthermore, the top of the rotating bracket is hinged with a support rod which is arranged parallel to the sampling arm. The upper end of the support rod and the upper end of the sampling arm are respectively hinged to the two ends of the connecting frame. The rotating bracket, the sampling arm, the connecting frame and the support rod constitute a parallelogram linkage mechanism, and the connecting frame is arranged vertically.

[0014] Furthermore, a pressure gauge housing is rotatably connected to the bottom end of the connecting frame, a negative pressure grain-penetrating connecting tube is fixedly connected between the bottom end of the pressure gauge housing and the top end of the penetration rod, and a pressure sensor is arranged between the bottom end of the connecting frame and the top end of the negative pressure grain-penetrating connecting tube.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] 1. The utility model provides grooved wheels on the inner wall of one side of the movable frame and grooveless wheels on the inner wall of the other side, and each set of grooved wheels and each set of grooveless wheels are two symmetrically arranged up and down, so that the top surface and the bottom surface of the running rail on one side are respectively embedded in the wheel grooves of the upper and lower two grooved wheels, so that the running wheels and the running rails can be rolled together, and the lateral guidance and limitation of the vehicle body on the running rails can be achieved by rolling engagement, and the grooveless wheels on the other side only roll with the top surface and the bottom surface of the running rail on the other side, and there is no strict requirement for the spacing or parallelism between the two outer side surfaces of the running rail, which can reduce the workload of making, assembling and debugging the running rails, thereby reducing the cost of use.

[0017] 2. Compared with the existing roller configuration of the sampling machine, the utility model omits the lateral roller, thereby simplifying the structural design, reducing the difficulty of assembly and debugging of the sampling trolley, and can directly carry out the loading and unloading operations of the grooved wheels and the grooveless wheels on the mobile frame on the walking rail, which is convenient for on-site maintenance and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0019] Figure 2 This is one of the three-dimensional structural schematic diagrams of the sampling trolley;

[0020] Figure 3 The second is a schematic diagram of the three-dimensional structure of the sampling trolley;

[0021] Figure 4 It is a three-dimensional structural schematic diagram of the sample picking trolley in an assembled state on the running rail;

[0022] Figure 5 It is one of the three-dimensional structural schematic diagrams of the sampling rotation mechanism;

[0023] Figure 6 The second is a schematic diagram of the three-dimensional structure of the sampling rotation mechanism;

[0024] Figure 7 It is a structural schematic diagram of the assembly state between the pick rod and the pick arm.

[0025] In the figure: 1. walking rail; 2. sampling trolley; 201. moving frame; 2011. through hole; 202. walking wheel; 2021. grooved wheel; 2022. grooveless wheel; 2023. wheel bracket; 203. walking rack; 204. walking motor; 205. walking gear; 206. motor mounting bracket; 3. sampling rotation mechanism; 301. rotating motor bracket; 302. rotating motor; 303. cylindrical gear; 304. rotating inner gear ring; 305. rotating outer ring; 4. rotating bracket; 5. sampling arm; 6. sampling rod; 7. electric cylinder; 8. support rod; 801. threaded rod; 802. adjusting plate; 9. connecting frame; 10. pressure gauge housing; 11. negative pressure grain connecting cylinder. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0027] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed on the other component or there may be a central component at the same time.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0029] The sampling machine needs to be used in conjunction with the existing sampling machine control system and negative pressure material taking equipment, which are all existing technologies and will not be described in detail here.

[0030] See also Figures 1 to 7A sampling machine includes a horizontally arranged running track 1, a sampling trolley 2 mounted on the top of the running track 1, a sampling rotating mechanism 3 fixedly arranged on the top of the sampling trolley 2, a rotating bracket 4 fixedly arranged on the top of the sampling rotating mechanism 3, a sampling arm 5 hinged on the top of the rotating bracket 4, and a sampling rod 6 hinged below the top of the sampling arm 5. The bottom of the rotating bracket 4 is hinged with an electric cylinder 7, and the other end of the electric cylinder 7 is hinged to the bottom of the middle section of the sampling arm 5. The sampling trolley 2 can move horizontally along the running track 1, the rotating bracket 4 can rotate freely around the vertical axis, the electric cylinder 7 extends / contracts to make the sampling arm 5 swing up / down accordingly, and the sampling rod 6 keeps a vertical state and rises and falls synchronously with the top of the sampling arm 5.

[0031] Specifically, in this embodiment, the walking rail 1 is made of cold-bent square hollow steel, divided into two parallel left and right rails, the inner sides of the two rails are fixedly connected by at least one rail connecting rod, and the lower end is supported by a rail column of a T-shaped structure, and the side of the walking rail 1 is fixedly connected to the top surface of the rail column by a connector made of angle steel. The rail column is made of hollow square steel welded, and a square support base plate is welded and fixed at the bottom end, and the support base plate is fixedly connected to the bottom surface of the grain picking operation area by bolts. In the case of long-distance movement, multiple walking rail units can be spliced ​​end to end to form a longer walking rail. The top two side ends of the rail column are respectively located on the inner side of the side wall of the mobile frame plate 201 of the sampling trolley 2, so that the sampling trolley 2 can pass through one end of the walking rail 1, so that the sampling trolley 2 can run smoothly on the entire walking rail with a longer distance.

[0032] like Figures 2 to 4 As shown, the sampling trolley 2 includes a moving frame 201, a traveling wheel 202 rotatably mounted on the inner walls of both sides of the moving frame 201 and rollingly matched with the traveling rail 1, and a traveling rack 203 fixedly connected to the outer surface of the traveling rail 1 and horizontally arranged. A traveling motor 204 is fixedly mounted on the top of one side wall of the moving frame 201, and a traveling gear 205 meshingly connected to the traveling rack 203 is fixedly connected to the output shaft end of the traveling motor 204. Among them, the traveling rack 203 is horizontally fixedly arranged on the side of one of the traveling rails 1 (such as Figure 4The left side surface of the left walking rail 1 shown in the figure). The moving frame 201 is composed of a rectangular plate at the top and vertical side plates located on the left and right sides of the bottom of the rectangular plate. The vertical side walls on both sides are respectively located on the outside of the outer walls of the two sides of the walking rail 1. A stepped notch is provided in the upper middle position of the vertical side wall on the left. A motor mounting frame 206 is fixedly installed in the upper space of the stepped notch by bolts. The walking motor 304 is fixedly installed on the top of the motor mounting frame 206, and the output shaft end is vertically arranged downward. The walking motor 304 adopts a servo reduction motor. The walking gear 205 is fixedly installed on the output shaft end of the walking motor 304, and is located in the lower space in the stepped notch, and is meshed with the walking rack 203. In this way, the walking gear 205 is driven to rotate by the walking motor 304, and then the moving frame 201 is driven to move horizontally and position along the direction of the walking rail 1 through meshing transmission.

[0033] The traveling wheels 202 include at least two groups of grooved wheels 2021 arranged on the inner wall of the vertical side wall on the left side of the moving frame 201 and at least two groups of grooveless wheels 2022 arranged on the inner wall of the vertical side wall on the right side of the moving frame 201. Each group of grooved wheels 2021 and each group of grooveless wheels 2022 are two groups symmetrically arranged up and down, and the top surface and bottom surface of the walking rail 1 on the left side are respectively embedded in the wheel grooves of the upper and lower two grooved wheels 2021. In this embodiment, on the vertical side wall on each side, the grooved wheels 2021 and the grooveless wheels 2022 are two groups arranged in the front and rear, and each group includes two arranged in the upper and lower parts, clamping the walking rail 1 therein, and the installation of the sampling trolley 2 on the walking rail 1 is realized through the rolling contact between the cylindrical surfaces of the rollers separated on both sides and the upper and lower surfaces of the walking rail 1. Each grooved wheel 2021 and each grooveless wheel 2022 are rotatably mounted in their respective wheel brackets 2023, which are fixedly connected to the inner side of the vertical side plate by bolts. When it is necessary to replace a wheel, the corresponding bolts are loosened from the outer side of the vertical side plate, and the corresponding wheel bracket 2023 and the wheel therein can be removed as a whole from the bottom or the front and rear ends of the mobile frame 201, and then the new wheel bracket 2023 and the wheel as a whole are returned to the original assembly position, and the bolts are tightened again, which is convenient for loading and unloading operations.

[0034] Flanges are integrally provided on the edges of the cylindrical surface of the fixed grooved wheel 2021, so that a wheel groove matching the width of the top surface of the running rail 1 is formed on the outer cylindrical surface, so that when the grooved wheel 2021 is mounted on the running rail 1 on the left side, the flanges on both sides thereof slide in cooperation with the top of the side surfaces of the running rail 1 on that side, thereby realizing the limitation of the grooved wheel 2021 on the left and right directions of the running rail 1. The slotless wheel 2022 on the right side only has a fixed contact between the cylindrical surface and the plane with the running rail 1 on the right side, and cooperates with the grooved wheel 2021 on the left side to stably mount the sampling trolley 2 on the running rail 1; at the same time, the slotless wheel 2022 on the right side has the freedom to move in any direction in the plane during the moving process. Therefore, when the grooved wheel 2021 moves along the running rail 1 on the left side, if the spacing between the running rails 1 on both sides changes, or a curved section appears on the running rail 1 on the left side, causing the fixed moving positions of the wheels on both sides to be unequal, the slotless wheel 2022 on the right side can produce a certain relative slip between the top and bottom surfaces of the running rail 1 to compensate for the rolling displacement difference, thereby ensuring the stability and smoothness of the sampling trolley 2 during the operation on the running rail 1.

[0035] A certain space is formed between the bottom of the moving frame plate 201 and the top of the running rail 1. A through hole 2011 is opened in the middle of the rectangular plate 1 to accommodate the driving part of the sampling rotation mechanism 3, making the overall structure more compact. Figure 5 and Figure 6 As shown, the sampling rotation mechanism 3 includes a rotating motor bracket 301 fixedly connected to the top surface of the mobile frame 201, a rotating motor 302 fixedly installed on the rotating motor bracket 301, a cylindrical gear 303 fixedly connected to the output shaft end of the rotating motor 302, and a rotating inner gear ring 304 located on the outside of the cylindrical gear 303 and meshingly connected with the inside of the cylindrical gear 303. A rotating outer ring 305 coaxially fixedly arranged on the outside of the rotating inner gear ring 304 is fixedly connected to the top surface of the mobile frame 201, and the rotating inner gear ring 304 and the rotating outer ring 305 are in sliding fit.

[0036] The rotating motor support 301 is composed of a circular plate at the top, an annular plate at the bottom, and a plurality of vertical connecting plates fixedly connected between the circular plate and the annular plate, forming a cylindrical frame structure. The annular plate at the bottom is fixedly connected to the top surface of the moving frame plate 201 by bolts, and the rotating outer ring 305 is coaxially arranged with the annular plate and fixedly connected to the top surface of the circular plate by bolts. The rotating motor 302 adopts a servo reduction motor, which is fixedly installed on the bottom surface of the circular plate and located in the annular plate and the through hole 2011. Its output shaft end movably penetrates the circular plate and is fixedly connected to the cylindrical gear 303 by a key. The cylindrical gear 303 is located above the top surface of the circular plate and is meshed with the rotating inner gear ring 304. The rotating motor 302 drives the cylindrical gear 303 to rotate, and then drives the rotating inner gear ring 304 to rotate through meshing transmission, and the rotating outer ring 305 performs circumferential positioning on the rotating inner gear ring 304.

[0037] In order to ensure the relative rotation performance between the rotating inner gear ring 304 and the rotating outer ring 305, a ball raceway with a semi-arc cross-section is provided on the outer circumferential wall of the rotating inner gear ring 304 and the inner circumferential wall of the rotating outer ring 305. A number of evenly distributed steel balls are arranged in the ball raceway, so that the rotating inner gear ring 304 and the rotating outer ring 305 form a rolling bearing structure. By rolling instead of sliding, the friction resistance during the relative rotation process is effectively reduced, and the stability during the rotation process is improved.

[0038] The rotating bracket 4 is composed of a bottom connecting plate, a top supporting plate, and a supporting column fixedly connected between the bottom connecting plate and the top supporting plate. A hinge seat at the lower end of the electric cylinder is fixedly arranged on one side of the top surface of the bottom connecting plate, and a connecting rod hinge seat is fixedly arranged on the top surface of the top supporting plate. The connecting rod hinge seat is provided with two sets of hinge holes arranged at the upper and lower sides, and the axes of the two sets of hinge holes are located in the same vertical plane, and the vertical distance between the two sets is L. The connecting frame 9 is also provided with two sets of hinge holes arranged at the upper and lower sides, and the axes of the two sets of hinge holes are located in the same vertical plane, and the vertical distance between the two sets is also L. A first U-shaped connector is fixedly arranged at the bottom end of the sampling arm 5, and the first U-shaped connector is rotatably connected to a lower set of hinge holes on the connecting rod hinge seat through a shaft rod; a second U-shaped connector is fixedly arranged at the top end of the sampling arm 5, and the second U-shaped connector is rotatably connected to a lower set of hinge holes on the connecting frame 9 through a shaft rod. The middle part of the sampling arm 5 is fixedly connected with the upper hinge seat of the electric cylinder, and the fixed end and the output shaft end of the electric cylinder 7 are rotatably connected with the upper hinge seat of the electric cylinder and the lower hinge seat of the electric cylinder through the shaft rod respectively. The sampling arm 5 can be pushed up or down by the extension or contraction of the electric cylinder 7, so as to realize the rise or fall of the connecting frame 9 and the pick rod 6, so that the bottom end of the pick rod 6 is moved out 2 or inserted into the grain to be sampled, thereby completing the grain sampling process. Preferably, in order to facilitate the connection and fixation of the upper hinge seat of the electric rod on the sampling arm 5 and improve the overall rigidity of the sampling arm 5, the sampling arm 5 is composed of two parallel steel pipes.

[0039] The top of the rotating bracket 4 is hinged with a support rod 8 arranged parallel to the top of the sampling arm 5, and the upper end of the support rod 8 and the upper end of the sampling arm 5 are respectively hinged to the two ends of the connecting frame 9. Specifically, the top end of the support rod 8 is coaxially fixed with a threaded rod 801, and the threaded rod 801 is sleeved with an adjustment plate 802, and the bottom end of the adjustment plate 802 is rotatably connected to a group of hinge holes on the upper side of the connecting frame 9 through an axial rod; the bottom end of the support rod 8 is fixedly connected with a connecting plate with the same structure and size as the adjustment plate 802, and the bottom end of the connecting plate is rotatably connected to a group of hinge holes on the connecting rod hinge seat through an axial rod. Preferably, the top two ends of the adjustment plate 802 are respectively provided with adjustment nuts threadedly connected to the threaded rod 801, and the position adjustment and positioning of the adjustment plate 802 on the threaded rod 801 can be achieved through the adjustment nuts. Thus, the rotating bracket 4, the sampling arm 5, the connecting frame 9 and the supporting rod 8 form a parallelogram linkage mechanism. Since the connecting frame 9 is arranged vertically, the sampling arm 5 can keep the sampling rod 6 in a vertical state when it is raised or lowered.

[0040] In order to prevent the bottom end of the pick rod 6 from colliding with the board of the grain transport vehicle during the process of inserting the pick rod 6 into the grain for sampling, thereby causing damage to the pick rod 6, the bottom end of the connecting frame 9 is rotatably connected with a pressure gauge housing 10, and a negative pressure grain pick connecting cylinder 11 is fixedly connected between the bottom end of the pressure gauge housing 10 and the top end of the pick rod 6. The feeding pipe of the negative pressure feeding equipment is passed into the negative pressure grain pick connecting cylinder 11 and connected to the top discharge port of the pick rod 6. A pressure sensor is arranged between the bottom end of the connecting frame 9 and the top end of the negative pressure grain pick connecting cylinder 11. The resistance of the pick rod 6 is detected by the pressure sensor. When the resistance exceeds the preset pressure value, the electric cylinder 7 is controlled to stop extending through the sampling machine control system, and the sampling head at the bottom of the pick rod 6 can be used to take grain at this position, or the electric cylinder 7 is controlled to shrink, so that the pick rod 6 rises a certain distance and then takes grain.

[0041] When the utility model is in use, the horizontal displacement of the pick rod 6 is realized by the sampling trolley 2, and the horizontal rotation of the pick rod 6 is realized by the sampling rotation mechanism 3, so as to realize the position adjustment of the pick rod 6 in the horizontal plane; the vertical lifting and lowering of the pick rod 6 is realized by the extension and retraction of the electric cylinder 7 and the parallelogram linkage mechanism, so as to realize the grain taking operation. In the process of lifting and lowering the pick rod 6, the pick arm 5 is raised or lowered, and its horizontal projection length will change, so the sampling trolley 2 and the sampling rotation mechanism 3 need to cooperate with each other to further adjust the horizontal position of the bottom end of the pick arm 5 and the angle between the horizontal projection of the pick arm 5 and the walking rail 1. The motion relationship between the horizontal displacement value, the horizontal rotation angle value and the vertical displacement of the pick rod 6 can be determined by the spatial geometric relationship, and the corresponding control equation can be written into the sampling machine control system.

[0042] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A sampling machine, characterized in that: The invention comprises a horizontally arranged running rail (1), a sampling trolley (2) mounted on the top of the running rail (1), a sampling rotating mechanism (3) fixedly arranged on the top of the sampling trolley (2), a rotating bracket (4) fixedly arranged on the top of the sampling rotating mechanism (3), a sampling arm (5) hinged to the top of the rotating bracket (4), and a sampling rod (6) hinged below the top of the sampling arm (5); an electric cylinder (7) is hinged at the bottom of the rotating bracket (4), and the other end of the electric cylinder (7) is hinged to the bottom of the middle section of the sampling arm (5); The sampling trolley (2) comprises a moving frame (201), running wheels (202) rotatably mounted on the inner walls of both sides of the moving frame (201) and rollingly matched with the running rail (1), and a running rack (203) fixedly connected to the outer surface of the running rail (1) and horizontally arranged, a running motor (204) is fixedly mounted on the top of one side wall of the moving frame (201), and a running gear (205) meshingly connected to the running rack (203) is fixedly connected to the output shaft end of the running motor (204); The running wheels (202) include at least two groups of grooved wheels (2021) arranged on the inner wall of one side of the moving frame (201) and at least two groups of grooveless wheels (2022) arranged on the inner wall of the other side of the moving frame (201), each group of grooved wheels (2021) and each group of grooveless wheels (2022) are two wheels arranged symmetrically up and down, and the top surface and the bottom surface of the running rail (1) on one side are respectively embedded in the wheel grooves of the two upper and lower grooved wheels (2021); The sampling trolley (2) can move horizontally along the running rail (1), the rotating bracket (4) can rotate freely around the vertical axis, the electric cylinder (7) extends / contracts to make the sampling arm (5) swing upward / downward accordingly, and the sampling rod (6) maintains a vertical state and rises and falls synchronously with the top end of the sampling arm (5).

2. A sampling machine according to claim 1, characterized in that: The sampling rotation mechanism (3) comprises a rotating motor support (301) fixedly connected to the top surface of the moving frame plate (201), a rotating motor (302) fixedly mounted on the rotating motor support (301), a cylindrical gear (303) fixedly connected to the output shaft end of the rotating motor (302), and a rotating inner gear ring (304) located outside the cylindrical gear (303) and meshingly connected to the inside of the cylindrical gear (303); a rotating outer ring (305) coaxially fixedly arranged outside the rotating inner gear ring (304) is fixedly connected to the top surface of the moving frame plate (201), and the rotating inner gear ring (304) and the rotating outer ring (305) are in sliding fit.

3. A sampling machine according to claim 2, characterized in that: A ball rolling track is provided on the outer circumferential wall of the rotating inner gear ring (304) and the inner circumferential wall of the rotating outer ring (305), and a plurality of evenly distributed steel balls are arranged in the ball rolling track.

4. A sampling machine according to any one of claims 1 to 3, characterized in that: The top of the rotating bracket (4) is hinged with a support rod (8) arranged parallel to the top of the sampling arm (5); the upper end of the support rod (8) and the upper end of the sampling arm (5) are respectively hinged to the two ends of a connecting frame (9); the rotating bracket (4), the sampling arm (5), the connecting frame (9) and the support rod (8) constitute a parallelogram linkage mechanism; the connecting frame (9) is arranged vertically.

5. A sampling machine according to claim 4, characterized in that: The bottom end of the connecting frame (9) is rotatably connected to a pressure gauge housing (10), a negative pressure grain-penetrating connecting cylinder (11) is fixedly connected between the bottom end of the pressure gauge housing (10) and the top end of the penetration rod (6), and a pressure sensor is provided between the bottom end of the connecting frame (9) and the top end of the negative pressure grain-penetrating connecting cylinder (11).

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