Sampling mechanism of a grain sampling machine

Abstract

The invention relates to the technical field of grain sampling and discloses a sampling mechanism of a grain sampling machine, comprising a sampling rod, wherein the tail end of the sampling rod is fixedly connected to a feeding pipe, and the head end of the feeding pipe is provided with a sampling head; the sampling head comprises: a fixed head fixedly connected to the head end of the sampling rod, the sampling rod is located above the fixed head and is provided with a feeding port; a rotating head rotatably connected to the bottom of the fixed head, and a buffer end is movably connected to the outer side of the rotating head, the buffer end comprises a buffer rod and a guide vane, and the buffer end is provided with three to six groups, and when the buffer rods are merged downward, the lower ends of the buffer rods form an arrow shape; a buffer mechanism is arranged inside the rotating head; by arranging the sampling head, when the sampling rod contacts the bottom of a carriage through the sampling head, the six groups of buffer rods spread outward and deflect in a discrete shape, so that the bottom of the sampling head is horizontal, thereby achieving the effect of protecting the sampling rod and preventing the tip from causing damage to the carriage, thereby effectively ensuring the safety of the sampling process of the sampling rod.

Description

Technical Field

[0001] The invention relates to the technical field of grain sampling, in particular to a sampling mechanism of a grain sampling machine. Background Art

[0002] Before grain is shipped into storage, it is necessary to take samples of the grain and then send them for inspection to ensure that the grain entering the storage meets the storage requirements. When sampling grain that is shipped in large quantities, a rail-type sampling machine is usually used for automatic mechanized sampling. The rail-type sampling machine is connected to a negative pressure adsorption machine through a feed pipe. When sampling, the sampling rod is usually controlled to be inserted into the compartment of the shipping vehicle, and then the negative pressure adsorption machine is started for extraction, and then the obtained sample is tested. When sampling, in order to ensure the sampling speed, it is usually necessary to maintain a certain descending speed of the sampling rod. However, the rapid descent of the sampling rod can easily cause the tip of the sampling rod to hit the bottom of the shipping vehicle, thereby causing damage to the bottom of the compartment and the tip of the drill rod.

[0003] In a Chinese patent with patent publication number CN115078003A, a guide rail type sampling machine with intelligent controlled sampling is disclosed, including a reinforcement mechanism and a protective mechanism. The protective mechanism includes a support plate, a hollow tube is inserted into the interior of the support plate, and the sampling rod is fixedly connected to a limiting slide rail on the side close to the hollow tube. A protective head is inserted into the interior of the hollow tube, and a limiting ring is sleeved on the outer side of the lower end of the protective head. A hollow spring is fixedly connected to the upper surface of the limiting ring. The upper end of the protective head is rotatably connected to a crank push rod, and the end of the crank push rod away from the protective head is rotatably connected to a sealing slide bar, and the sealing slide bar is slidably connected to the limiting slide rail.

[0004] When the protective head on one side of the lower end of the sampling rod first contacts the bottom surface of the carrier, the protective head slides inside the hollow tube, and at the same time, the hollow spring undergoes elastic deformation, which helps to protect the sampling rod and prevent the sampling rod from being damaged. The upper end of the protective head pushes the sealing slide bar to slide upward inside the limit slide rail through the crank push rod, and the sealing slide bar drives the warning plate at the upper end to move upward, so that the warning plate drives the warning ring on the outer side of the upper end to move synchronously, thereby playing a warning role, making it convenient to understand the insertion depth of the sampling rod, so as to achieve the effect of protecting the sampling rod. Although the warning effect can be achieved, when the actual sampling rod contacts the bottom of the compartment, the sampling rod and the compartment body cannot be effectively protected, and the protection effect of the sampling rod cannot be effectively guaranteed. Moreover, during the above-mentioned sampling rod protection process, staff usually need to monitor, and in order to ensure the accuracy of the sampling rod monitoring, the sampling speed of the above-mentioned sampling rod needs to be kept at a low speed, which reduces the sampling efficiency.

[0005] At the same time, in the Chinese patent with patent publication number CN118130159B, a grain sampling machine is disclosed, including a linkage mechanism, the linkage mechanism is connected to the bottom end of the sampling arm, the top end of the sampling arm is connected to the sleeve, the sleeve is also connected to the top end of the connecting rod, a sampling rod is inserted into the sleeve, the sampling rod and the sleeve are telescopically connected, a locking mechanism is provided between the sleeve and the sampling rod to realize the switching of the sleeve and the sampling rod between the locking and loosening states, a stopper is also fixed in the sleeve, and an elastic member is provided between the stopper and the sampling rod; the locking mechanism and the linkage mechanism are realized Flexible bottoming out, the lifting motor of the linkage mechanism does not need to stop suddenly, avoiding problems such as lifting motor current overload and driver error, and avoiding the occurrence of sampling machine accidents; however, in the actual working process, when the sampling rod touches the bottom, due to the fast driving speed of the lifting motor, the spring is used for buffering. During the sampling process, the sampling rod is squeezed and rubbed with the grain at the same time, and the spring is synchronously and rapidly compressed. Therefore, when the sampling rod touches the bottom, the actual buffering distance of the spring is limited, so the buffering of the lifting motor is limited, and the protection effect on the sampling rod and the carriage is limited, which affects the use effect. Summary of the Invention

[0006] In view of the deficiencies in the prior art, the present invention provides a sampling mechanism for a grain sampling machine, which has the advantages of improving the protective effect on sampling and effectively ensuring the protective effect on the sampling rod and the carriage when the sampling rod touches the bottom.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A sampling mechanism of a grain sampling machine comprises a sampling rod, the tail end of the sampling rod is fixedly connected to a feeding pipe, and the head end of the feeding pipe is provided with a sampling head;

[0009] The sampling head comprises:

[0010] The fixed head is fixedly connected to the head end of the sampling rod, and the sampling rod is located above the fixed head and has a feed port;

[0011] The rotating head is rotatably connected to the bottom of the fixed head. The outer side of the rotating head is movably connected to a buffer end, which includes a buffer rod and a guide vane. The buffer end is provided with three to six groups. When the buffer rods are merged downward, the lower ends of the buffer rods form an arrow shape.

[0012] The buffer mechanism is arranged inside the rotating head. The buffer mechanism includes a detection rod. A first pressure spring is arranged between the detection rod and the rotating head. The detection rod abuts against the top of the buffer rod to push the multiple buffer rods toward a merged state.

[0013] Preferably: a sampling bracket for fixing the sampling rod is provided on the outside of the sampling rod, and a guide wheel is movably connected to the outside of the sampling bracket, and the guide wheel is used to clamp and position the sampling rod, and guide sliders are fixedly connected to both sides of the sampling rod, and the guide sliders are slidably connected to the sampling bracket, and a driving gear is provided on the outside of the driving gear, and a driving motor is provided on the outside of the driving gear. Drive assemblies are provided on both sides of the sampling rod, and the driving gear is used to drive the sampling rod to move up and down through the driving assembly. A movable seat for supporting the sampling bracket is provided on the outside of the sampling bracket, and a movable guide rail is provided on the outside of the movable seat, and the movable guide rail is provided in the area to be detected, and the movable seat can be drivably installed on the top of the movable guide rail.

[0014] Preferably, the driving assembly includes a positioning rod fixedly connected to the outside of the sampling rod, the outside of the positioning rod is movably connected to a driving gear rod, and the driving gear is meshed with the driving gear rod.

[0015] Preferably, an elastic member is provided inside the rotating head, the elastic member is composed of a winding wheel and a pull rope, the end of the pull rope is connected to the buffer rod, and the winding wheel is used to pull the buffer rod to deflect toward the rotating head through the pull rope.

[0016] Preferably, a movable plate is fixedly connected to the top of the detection rod, a second pressure spring is provided between the movable plate and the rotating head, and the first pressure spring and the second pressure spring are used to keep the detection rod tending to move downward.

[0017] Preferably: a drive adjustment assembly for regulating the drive assembly is also provided inside the rotating head, the drive adjustment assembly includes a movable rod fixedly connected to the top of the movable plate, the top of the movable rod is fixedly connected to a plane bearing, the top of the plane bearing is fixedly connected to a push rod, the top of the push rod is fixedly connected to a push plate, an inner push spring is provided between the push plate and the fixed head, and the top of the push plate is fixedly connected to a control rod extending to the inside of the positioning rod.

[0018] Preferably: the driving assembly also includes an adjusting slider movably connected to the inside of the positioning rod, the outside of the adjusting slider is provided with an inclined guide groove, the inside of the guide groove is slidably connected with a regulating rod, the regulating rod is set to a "C" shape, the regulating rod passes through the positioning rod horizontally, and the other end of the regulating rod is fixedly connected to the driving gear rod.

[0019] Preferably: the internal symmetrical movable connection of the adjusting slider is provided with a movable pin, the internal fixed connection of the positioning rod is provided with a limit block adapted to the movable pin, a pressure rod is hinged between the two sets of movable pins, a limiting spring is provided between the pressure rod and the adjusting slider, a reset spring is provided between the adjusting slider and the positioning rod, a reset rod extending to the top of the positioning rod is fixedly connected above the adjusting slider, the pressure rod abuts against the top of the control rod, and a reset drive for pushing the pressure rod is provided on the top of the sampling rod.

[0020] Preferably: an auxiliary feeding mechanism is provided inside the sampling rod, the auxiliary feeding mechanism includes a positioning base plate rotatably connected to the bottom of the sampling rod, the top of the positioning base plate is fixedly connected to a conical spiral blade, the feed port is height-adapted to the conical spiral blade, a driving rod is fixedly connected to the bottom of the positioning base plate, a vortex spring is provided between the driving rod and the fixed head, an inner sleeve rod is movably connected to the inside of the driving rod, the lower end of the inner sleeve rod is movably connected to a ratchet plate, an insert block is meshed and connected to the bottom of the ratchet plate, a driving spring is provided between the ratchet plate and the driving rod, the top of the rotating head is fixedly connected to a connecting block, the insert block is inserted into the top of the connecting block, the insert block is rotatably connected to the inside of the fixed head, the top of the rotating head passes through a movably connected unlocking rod, the unlocking rod is fixedly connected to the top of the movable plate, the unlocking rod movably passes through the insert block, and the unlocking rod is used to control the separation of the ratchet plate and the insert block.

[0021] Preferably, a locking groove adapted to the positioning base plate is provided on the inner bottom of the sampling rod, a locking block is movably inserted into the circumferential side of the positioning base plate, and a locking spring is provided between the locking block and the positioning base plate.

[0022] Beneficial effects of the present invention:

[0023] 1. The sampling mechanism of the grain sampling machine is equipped with a sampling head. When the sampling rod contacts the bottom of the carriage through the sampling head, six groups of buffer rods spread outward and deflect in a discrete shape, making the bottom of the sampling head horizontal, thereby protecting the sampling rod and preventing the tip from damaging the carriage, thereby effectively ensuring the safety of the sampling rod during the sampling process.

[0024] 2. The sampling mechanism of the grain sampling machine, through the drive adjustment component and the drive component, facilitates the drive motor to control the rapid downward movement of the sampling rod, and when the sampling head touches the bottom, the drive gear and the drive gear rod can be quickly separated, thereby ensuring the safety of the sampling rod during rapid movement. The drive separation of the drive gear and the drive gear rod is utilized to realize the drive separation of the drive motor, and the drive of the sampling rod is paused through the drive separation, thereby effectively ensuring the safety of the sampling rod, avoiding the subsequent driving process from increasing damage to the sampling rod or the bottom of the carriage, and at the same time avoiding damage to the drive motor when the drive motor stops suddenly, effectively improving the service life of the drive motor, and improving the overall use effect and service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the main part of the present invention;

[0026] Figure 2 This is a partial schematic diagram of the connection between the sampling support and the sampling rod of the present invention;

[0027] Figure 3 Schematic cross-sectional view of the end of the sampling rod and the sampling head of the present invention;

[0028] Figure 4 This is a schematic diagram of the auxiliary feeding mechanism of the present invention;

[0029] Figure 5 This is a schematic diagram of the connection between the drive adjustment assembly and the buffer mechanism of the present invention;

[0030] Figure 6 This is a schematic diagram of the buffer rod of the present invention in an expanded state;

[0031] Figure 7 For the present invention Figure 3 A magnified schematic diagram of part A;

[0032] Figure 8 For the present invention Figure 3 A magnified schematic diagram of part B;

[0033] Figure 9 This is a schematic diagram of the connection between the positioning rod, the adjustment slider and the control rod of the present invention;

[0034] Figure 10 This is a schematic diagram of the connection between the control rod and the driving gear rod of the present invention;

[0035] Figure 11 For the present invention Figure 9 Enlarged schematic diagram of part C.

[0036] Figure: 1. Moving guide rail; 11. Moving seat; 2. Sampling bracket; 21. Guide wheel; 3. Sampling rod; 31. Feed inlet; 32. Guide slide; 33. Reset drive; 4. Drive gear; 5. Drive motor; 6. Drive assembly; 7. Feed pipe; 8. Sampling head;

[0037] 61. Positioning rod; 62. Driving gear rod; 63. Control rod; 64. Adjusting slider; 65. Guide groove; 66. Limit block; 67. Movable pin; 68. Press rod; 69. Limit spring; 610. Return spring; 611. Return rod;

[0038] 81. Fixed head; 82. Rotating head; 821. Connecting block; 83. Buffer end; 831. Buffer rod; 832. Guide vane; 833. Elastic member; 84. Buffer mechanism; 85. Auxiliary feeding mechanism; 86. Unlocking lever; 87. Drive adjustment assembly;

[0039] 841, detection rod; 842, first pressure spring; 843, movable plate; 844, second pressure spring;

[0040] 851, positioning base plate; 8511, locking block; 8512, locking spring; 852, locking groove; 853, conical spiral blade; 854, driving rod; 855, vortex spring; 856, ratchet plate; 8561, inner sleeve rod; 857, insert block; 858, driving spring;

[0041] 871. Movable rod; 872. Push rod; 873. Plane bearing; 874. Push plate; 875. Inner push spring; 876. Control rod. DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of the present invention will be clearly and completely described below. 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 those skilled in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0043] Example 1

[0044] See also Figure 1 - Figure 11 A sampling mechanism of a grain sampling machine includes a sampling rod 3, the tail end of the sampling rod 3 is fixedly connected to a feeding pipe 7, and the head end of the feeding pipe 7 is provided with a sampling head 8;

[0045] The sampling head 8 includes:

[0046] The fixed head 81 is fixedly connected to the head end of the sampling rod 3. The sampling rod 3 is located above the fixed head 81 and has a feed port 31;

[0047] The rotating head 82 is rotatably connected to the bottom of the fixed head 81. The outer side of the rotating head 82 is movably connected to a buffer end 83. The buffer end 83 includes a buffer rod 831 and a guide vane 832. The buffer end 83 is provided in three to six groups. When the buffer rods 831 are merged downward, the lower ends of the buffer rods 831 form an arrow shape.

[0048] The buffer mechanism 84 is arranged inside the rotating head 82. The buffer mechanism 84 includes a detection rod 841. A first pressure spring 842 is arranged between the detection rod 841 and the rotating head 82. The detection rod 841 abuts against the top of the buffer rod 831 to push the multiple buffer rods 831 toward a merged state.

[0049] During the sampling process, the sampling rod 3 is driven to move downward. When the sampling rod 3 contacts the bottom of the compartment through the sampling head 8, the six groups of buffer rods 831 spread outward and deflect in a discrete shape (refer to Figure 6 ), so that the bottom of the sampling head 8 is horizontal, thereby protecting the sampling rod 3 and preventing the tip from causing damage to the carriage, thereby effectively ensuring the safety of the sampling process of the sampling rod 3.

[0050] During the sampling process, when the needle is inserted into the grain, grain samples can be sucked through the feed port 31 .

[0051] refer to Figure 3 and Figure 5 The initial state of the buffer rod 831 is in a merged state, and the detection rod 841 is in contact with the top of the buffer rod 831. When the buffer rod 831 contacts the bottom surface of the compartment, the compartment pushes the buffer rod 831 to diffuse outward. At the same time, the buffer rod 831 generates a thrust on the detection rod 841, causing the detection rod 841 to move upward. When the detection rod 841 moves upward, the first pressure spring 842 is compressed. The detection rod 841 and the first pressure spring 842 are used to keep the buffer rod 831 stable in the merged state, thereby facilitating the smooth insertion of the sampling rod 3 into the interior of the compartment. When the pressure of the compartment bottom on the buffer rod 831 is greater than the pressure of the buffer mechanism 84, the buffer rod 831 is facilitated to separate, thereby changing the bottom of the sampling head 8 to a horizontal state, avoiding damage to the compartment and the sampling rod 3.

[0052] refer to Figure 1 and Figure 2 In an optional embodiment, a sampling bracket 2 for fixing the sampling rod 3 is provided on the outside of the sampling rod 3, and a guide wheel 21 is movably connected to the outside of the sampling bracket 2. The guide wheel 21 is used to clamp and position the sampling rod 3. Guide sliders 32 are fixedly connected to both sides of the sampling rod 3, and the guide sliders 32 are slidably connected to the sampling bracket 2. A driving gear 4 is provided on the outside of the driving gear 4. A driving motor 5 is provided on the outside of the driving gear 4. A driving assembly 6 is provided on both sides of the sampling rod 3. The driving gear 4 is used to drive the sampling rod 3 to move up and down through the driving assembly 6. A moving seat 11 for supporting the sampling bracket 2 is provided on the outside of the sampling bracket 2, and a moving guide rail 1 is provided on the outside of the moving seat 11. The moving guide rail 1 is set in the area to be detected, and the moving seat 11 can be drivably installed on the top of the moving guide rail 1.

[0053] It should be noted that both ends of the movable guide rail 1 also include a driven support seat for controlling the lateral movement of the movable guide rail 1. The movable guide rail 1, the movable seat 11 and the sampling bracket 2 cooperate to achieve three-way control of the X, Y and Z axes of the sampling rod 3, thereby facilitating the sampling action of the sampling rod 3.

[0054] In an optional embodiment, the driving assembly 6 includes a positioning rod 61 fixedly connected to the outside of the sampling rod 3, and the outside of the positioning rod 61 is movably connected to a driving gear rod 62, and the driving gear 4 is meshed with the driving gear rod 62.

[0055] During the vertical driving process, the driving motor 5 drives the driving gear 4 to rotate, and the driving gear 4 drives the sampling rod 3 to move vertically via the driving gear rod 62, thereby completing the sampling work of the sampling rod 3.

[0056] refer to Figure 3 and Figure 7In an optional embodiment, an elastic member 833 is provided inside the rotating head 82. The elastic member 833 is composed of a winding wheel and a pull rope. The end of the pull rope is connected to the buffer rod 831. The winding wheel is used to pull the buffer rod 831 toward the rotating head 82 through the pull rope.

[0057] It should be noted that when the buffer rod 831 deflects outward, the buffer rod 831 stretches the pull rope, and the pull rope drives the winding wheel to rotate. Further, when the buffer rod 831 is free from the restriction, the buffer rod 831 is reset under the action of the elastic member 833.

[0058] Furthermore, the elastic member 833 acts on the reset of the buffer rod 831, including but not limited to a winding wheel and a pull rope, and also includes an elastic rope setting.

[0059] refer to Figure 3 and Figure 5 In an optional embodiment, a movable plate 843 is fixedly connected to the top of the detection rod 841, and a second pressure spring 844 is provided between the movable plate 843 and the rotating head 82. The first pressure spring 842 and the second pressure spring 844 are used to keep the detection rod 841 tending to move downward.

[0060] It should be noted that the rotating head 82 and the fixed head 81 are detachably threadedly connected, and different first pressure springs 842 and second pressure springs 844 can be replaced by removing the rotating head 82 to adapt to different types of grains, thereby facilitating and flexibly adjusting the trigger pressure of the buffer rod 831.

[0061] Example 2

[0062] refer to Figure 3 、 Figure 5 、 Figure 9 、 Figure 10 and Figure 11 , further on the basis of Example 1, a drive adjustment component 87 for regulating the drive component 6 is further provided inside the rotating head 82, and the drive adjustment component 87 includes a movable rod 871 fixedly connected to the top of the movable plate 843, and the top of the movable rod 871 is fixedly connected to a plane bearing 873, and the top of the plane bearing 873 is fixedly connected to a push rod 872, and the top of the push rod 872 is fixedly connected to a push plate 874, and an inner push spring 875 is provided between the push plate 874 and the fixed head 81, and the top of the push plate 874 is fixedly connected to a control rod 876 extending to the inside of the positioning rod 61.

[0063] It should be noted that during the upward movement of the movable plate 843, the movable plate 843 drives the movable rod 871 to move upward, the movable rod 871 drives the push rod 872 to move upward through the plane bearing 873, the push rod 872 drives the push plate 874 to move upward, and the push plate 874 drives the control rod 876 to move upward. The drive assembly 6 is regulated by the control rod 876 to ensure the state synchronization of the drive assembly 6 and the sampling head 8.

[0064] Furthermore, the movable rod 871 and the rotating head 82 can rotate synchronously, and the plane bearing 873 is used to connect the movable rod 871 and the push rod 872.

[0065] refer to Figures 9-11 In an optional embodiment, the driving assembly 6 also includes an adjusting slider 64 movably connected to the inside of the positioning rod 61, and an inclined guide groove 65 is provided on the outside of the adjusting slider 64. A regulating rod 63 is slidably connected to the inside of the guide groove 65. The regulating rod 63 is set in a "C" shape, and the regulating rod 63 horizontally passes through the positioning rod 61. The other end of the regulating rod 63 is fixedly connected to the driving gear rod 62.

[0066] When the adjusting slider 64 slides, the adjusting slider 64 drives the regulating rod 63 to move laterally through the guide groove 65, and the regulating rod 63 drives the driving gear rod 62 to move laterally outside the positioning rod 61. By controlling the driving gear rod 62 to move laterally outside the positioning rod 61, the meshing state of the driving gear rod 62 and the driving gear 4 is adjusted. When the driving gear rod 62 and the driving gear 4 are close to each other, the driving gear rod 62 and the driving gear 4 are in a meshing state. When the driving gear rod 62 moves away from the driving gear 4, the driving gear rod 62 and the driving gear 4 are disengaged.

[0067] Furthermore, the internal symmetrical movable connection of the adjusting slider 64 is provided with a movable pin 67, the internal fixed connection of the positioning rod 61 is provided with a limit block 66 adapted to the movable pin 67, a pressure rod 68 is hinged between the two groups of movable pins 67, a limiting spring 69 is provided between the pressure rod 68 and the adjusting slider 64, a reset spring 610 is provided between the adjusting slider 64 and the positioning rod 61, and a reset rod 611 extending to the top of the positioning rod 61 is fixedly connected above the adjusting slider 64, the pressure rod 68 abuts against the top of the control rod 876, and the top of the sampling rod 3 is provided with a reset drive 33 for pushing the pressure rod 68.

[0068] Specifically, when the sampling head 8 contacts the bottom of the carriage, the control rod 876 moves upward, and the control rod 876 pushes the pressure rod 68 to move upward. The pressure rod 68 drives the movable pins 67 on both sides to slide inward, thereby disengaging from the limit block 66. Then, the adjusting slider 64 slides upward under the action of the return spring 610, and the adjusting slider 64 drives the regulating rod 63 to move, and the regulating rod 63 drives the driving gear rod 62 to move away from the driving gear 4, thereby realizing rapid separation of the driving gear 4 from the driving gear rod 62, preventing the sampling rod 3 and the sampling head 8 from further hitting the bottom of the carriage.

[0069] When sampling is completed, the reset drive 33 is used to push the reset rod 611 to move downward, the reset rod 611 pushes the adjustment slider 64 to move downward, and the adjustment slider 64 drives the driving gear rod 62 and the driving gear 4 to return to the meshing state through the regulating rod 63.

[0070] Furthermore, the return spring 610 is compressed during the movement of the adjustment slider 64 , and at the same time, the movable pin 67 is restored to be engaged with the limit block 66 .

[0071] Repeating the above process facilitates the completion of multiple batches of rapid sampling of on-board grain, and by driving the adjustment component 87 and the drive component 6, the drive motor 5 can control the rapid downward movement of the sampling rod 3, and when the sampling head 8 touches the bottom, the drive gear 4 and the drive gear rod 62 can be quickly separated, thereby ensuring the safety of the sampling rod 3 during rapid movement, and the drive separation of the drive motor 5 is achieved by separating the drive gear 4 and the drive gear rod 62, and the drive of the sampling rod 3 is paused through the drive separation, thereby effectively ensuring the safety of the sampling rod 3, avoiding the subsequent driving process from increasing damage to the sampling rod 3 or the bottom of the carriage, and at the same time avoiding damage to the drive motor 5 when the drive motor 5 stops suddenly, effectively improving the service life of the drive motor 5, and improving the overall use effect and service life of the device.

[0072] It should be noted that the positioning rod 61 is provided with at least one group of adjustment sliders 64. When multiple groups of adjustment sliders 64 are provided, the pressure rod 68 of the bottom adjustment slider 64 abuts the control rod 876, and the reset rod 611 of the top adjustment slider 64 extends to the outside of the positioning rod 61 to cooperate with the reset drive 33, and the reset rods 611 and pressure rods 68 of several middle adjustment sliders 64 cooperate with each other.

[0073] Example 3

[0074] refer to Figure 3 and Figure 4 On the basis of the second embodiment, the feeding of the sample is further enhanced, especially for the process of the sampling rod 3 touching the bottom. Specifically:

[0075] An auxiliary feeding mechanism 85 is provided inside the sampling rod 3. The auxiliary feeding mechanism 85 includes a positioning base plate 851 rotatably connected to the bottom of the sampling rod 3. A conical spiral leaf 853 is fixedly connected to the top of the positioning base plate 851. The feed port 31 is highly adapted to the conical spiral leaf 853. A driving rod 854 is fixedly connected to the bottom of the positioning base plate 851. A vortex spring 855 is provided between the driving rod 854 and the fixed head 81. An inner sleeve rod 8561 is movably connected to the inside of the driving rod 854. The lower end of the inner sleeve rod 8561 is movably connected to a ratchet plate 856. The ratchet plate 856 is meshed with an insert block 857 at the bottom, and a driving spring 858 is provided between the ratchet plate 856 and the driving rod 854. The top of the rotating head 82 is fixedly connected to the connecting block 821, and the insert block 857 is inserted into the top of the connecting block 821. The insert block 857 is rotatably connected to the inside of the fixed head 81. The top of the rotating head 82 is movably connected with an unlocking rod 86, which is fixedly connected to the top of the movable plate 843. The unlocking rod 86 movably passes through the insert block 857. The unlocking rod 86 is used to control the separation of the ratchet plate 856 and the insert block 857.

[0076] It should be noted that, in the initial state, the ratchet plate 856 and the insert block 857 are in a meshing state, and the rotating head 82 can drive the driving rod 854 to rotate through the insert block 857 and the ratchet plate 856 .

[0077] During the downward movement of the sampling rod 3, the sampling rod 3 drives the sampling head 8 to move downward. When the sampling head 8 is inserted into the grain, the guide vane 832 drives the rotating head 82 to rotate. The rotating head 82 drives the insertion block 857 to rotate through the connecting block 821. The insertion block 857 drives the driving rod 854 to rotate through the ratchet plate 856. During the rotation of the driving rod 854, the vortex spring 855 is driven to store force. When the elastic potential energy of the vortex spring 855 is released, the vortex spring 855 drives the positioning base plate 851 to rotate through the driving rod 854 and the inner sleeve rod 8561. The positioning base plate 851 drives the conical spiral leaf 853 at the top to rotate.

[0078] Furthermore, the vortex spring 855 releases elastic potential energy during sampling, and achieves the effect of auxiliary sampling by controlling the rotation of the conical spiral blade 853. The rotating conical spiral blade 853 is used to push the grain at the feed port 31 of the sampling rod 3 to move upward, thereby facilitating the external negative pressure machine to absorb the grain sample, and effectively preventing the grain from being blocked at the feed port 31, effectively ensuring the stability of grain sampling and ensuring the efficiency of grain sampling.

[0079] refer to Figure 3 、 Figure 4 and Figure 8In an optional embodiment, a locking groove 852 adapted to the positioning substrate 851 is provided at the inner bottom of the sampling rod 3, a locking block 8511 is movably inserted into the circumferential side of the positioning substrate 851, and a locking spring 8512 is provided between the locking block 8511 and the positioning substrate 851.

[0080] It should be noted that, in the initial state, the locking block 8511 engages with the inside of the locking groove 852 to limit the rotation of the drive rod 854, ensuring that the vortex spring 855 can stably accumulate elastic potential energy. The further positioning base plate 851 is fixedly connected to the top of the inner sleeve rod 8561, and the inner sleeve rod 8561 and the drive rod 854 are limitedly slidably connected, and the inner sleeve rod 8561 and the drive rod 854 maintain a synchronous rotation state.

[0081] When the vortex spring 855 releases its elastic potential energy, the vortex spring 855 drives the driving rod 854 to rotate, the driving rod 854 drives the inner sleeve rod 8561 to rotate, and the inner sleeve rod 8561 drives the positioning base plate 851 to rotate.

[0082] Specifically, when the rotating head 82 contacts the bottom of the compartment, the buffer rod 831 pushes the detection rod 841 to move upward, the detection rod 841 pushes the movable plate 843 to move upward, and the movable plate 843 pushes the ratchet plate 856 to move upward through the unlocking rod 86, so that the ratchet plate 856 and the insert block 857 are separated. At the same time, the ratchet plate 856 pushes the positioning base plate 851 to move upward through the inner sleeve rod 8561, thereby causing the positioning base plate 851 to disengage from the locking groove 852, releasing the limit on the positioning base plate 851, and then releasing the limit of the vortex spring 855, so that the vortex spring 855 can release its elastic potential energy.

[0083] When the ratchet plate 856 and the insert block 857 are separated, the positioning base plate 851 and the locking groove 852 are separated, thereby ensuring that the positioning base plate 851 drives the conical spiral blade 853 to rotate stably, facilitating auxiliary feeding, and increasing the sampling effect when the sampling rod 3 touches the bottom, avoiding the high pressure at the bottom of the grain that causes the grain to be blocked at the feed port 31, increasing the stability of the sampling rod 3 in sampling when it touches the bottom, and ensuring the sampling efficiency of the sampling rod 3.

[0084] When the sampling is completed, the sample rod 3 is reset under the action of the driving spring 858, the first pressure spring 842 and the second pressure spring 844, so as to facilitate the next sampling action of the sample rod 3.

[0085] By setting up a sampling head 8, the sampling head 8 is composed of a fixed head 81 and a rotating head 82, and the internal buffer rod 831, the buffer mechanism 84 and the auxiliary feeding mechanism 85 are used in coordination, so as to ensure that when the sampling head 8 contacts the bottom of the car, the buffer mechanism 84 and the auxiliary feeding mechanism 85 are triggered to complete the sampling action of the sampling rod 3. The buffer rod 831 that can be diffusely offset is used to effectively protect the sampling rod 3 and the car, ensuring safety during sampling. At the same time, when the sampling rod 3 touches the bottom, the sampling effect is enhanced, the sampling effect when the sampling rod 3 touches the bottom is increased, and the sampling efficiency is improved.

[0086] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A sampling mechanism of a grain sampling machine, comprising a sampling rod (3), the tail end of the sampling rod (3) being fixedly connected to a feed pipe (7), characterized in that: A sampling head (8) is provided at the head end of the feed pipe (7); The sampling head (8) comprises: A fixed head (81) is fixedly connected to the head end of the sampling rod (3), and the sampling rod (3) is located above the fixed head (81) and is provided with a feed port (31); The rotating head (82) is rotatably connected to the bottom of the fixed head (81). The outer side of the rotating head (82) is movably connected to a buffer end (83). The buffer end (83) includes a buffer rod (831) and a guide vane (832). The buffer end (83) is provided with three to six groups. When the buffer rods (831) are merged downward, the lower ends of the buffer rods (831) form an arrow shape. A buffer mechanism (84) is provided inside the rotating head (82), the buffer mechanism (84) includes a detection rod (841), a first pressure spring (842) is provided between the detection rod (841) and the rotating head (82), and the detection rod (841) abuts against the top of the buffer rod (831) to push the plurality of buffer rods (831) toward a merged state; A movable plate (843) is fixedly connected to the top of the detection rod (841), and a second pressure spring (844) is provided between the movable plate (843) and the rotating head (82). The first pressure spring (842) and the second pressure spring (844) are used to keep the detection rod (841) tending to move downward; The interior of the rotating head (82) is further provided with a driving adjustment component (87) for regulating the driving component (6), the driving adjustment component (87) comprising a movable rod (871) fixedly connected to the top of the movable plate (843), the top of the movable rod (871) being fixedly connected to a plane bearing (873), the top of the plane bearing (873) being fixedly connected to a push rod (872), the top of the push rod (872) being fixedly connected to a push plate (874), an inner push spring (875) being provided between the push plate (874) and the fixed head (81), and the top of the push plate (874) being fixedly connected to a control rod (876) extending to the interior of the positioning rod (61); The driving assembly (6) further includes an adjusting slider (64) movably connected to the interior of the positioning rod (61), an inclined guide groove (65) is provided on the exterior of the adjusting slider (64), a regulating rod (63) is slidably connected to the interior of the guide groove (65), the regulating rod (63) is configured in a "C" shape, the regulating rod (63) laterally passes through the positioning rod (61), and the other end of the regulating rod (63) is fixedly connected to the driving gear rod (62); The adjusting slider (64) is symmetrically and movably connected to a movable pin (67), the positioning rod (61) is fixedly connected to a limit block (66) adapted to the movable pin (67), a pressure rod (68) is hinged between the two sets of movable pins (67), a limit spring (69) is provided between the pressure rod (68) and the adjusting slider (64), a reset spring (610) is provided between the adjusting slider (64) and the positioning rod (61), a reset rod (611) extending to the top of the positioning rod (61) is fixedly connected above the adjusting slider (64), the pressure rod (68) abuts against the top of the control rod (876), and a reset drive (33) for pushing the pressure rod (68) is provided at the top of the sampling rod (3).

2. The sampling mechanism of a grain sampling machine according to claim 1, characterized in that: The sampling rod (3) is provided with a sampling bracket (2) for fixing the sampling rod (3) on the outside, and a guide wheel (21) is movably connected to the outside of the sampling bracket (2), and the guide wheel (21) is used to clamp and position the sampling rod (3). Guide slide blocks (32) are fixedly connected to both sides of the sampling rod (3), and the guide slide blocks (32) are slidably connected to the sampling bracket (2). A driving gear (4) is provided on the outside of the sampling bracket (2), and a A driving motor (5) is provided, and driving components (6) are provided on both sides of the sampling rod (3). The driving gear (4) is used to drive the sampling rod (3) to move up and down through the driving component (6). A movable seat (11) for supporting the sampling bracket (2) is provided on the outside of the sampling bracket (2). A movable guide rail (1) is provided on the outside of the movable seat (11). The movable guide rail (1) is provided in the area to be detected, and the movable seat (11) is drivably installed on the top of the movable guide rail (1).

3. The sampling mechanism of a grain sampling machine according to claim 2, characterized in that: The driving assembly (6) comprises a positioning rod (61) fixedly connected to the outside of the sampling rod (3); the outside of the positioning rod (61) is movably connected to a driving gear rod (62); and the driving gear (4) and the driving gear rod (62) are meshed and connected.

4. The sampling mechanism of a grain sampling machine according to claim 1, characterized in that: An elastic member (833) is provided inside the rotating head (82). The elastic member (833) is composed of a winding wheel and a pull rope. The end of the pull rope is connected to the buffer rod (831). The winding wheel is used to pull the buffer rod (831) through the pull rope to deflect it toward the rotating head (82).

5. The sampling mechanism of a grain sampling machine according to claim 1, characterized in that: An auxiliary feeding mechanism (85) is provided inside the sampling rod (3), and the auxiliary feeding mechanism (85) comprises a positioning base plate (851) rotatably connected to the bottom of the sampling rod (3), a conical spiral leaf (853) is fixedly connected to the top of the positioning base plate (851), and the feed port (31) is highly adapted to the conical spiral leaf (853), a driving rod (854) is fixedly connected below the positioning base plate (851), a vortex spring (855) is provided between the driving rod (854) and the fixed head (81), an inner sleeve rod (8561) is movably connected inside the driving rod (854), and a ratchet plate (856) is movably connected to the lower end of the inner sleeve rod (8561), and the ratchet plate (856) is movably connected to the lower end of the ratchet plate (856). The tooth plate (856) is meshedly connected with an insert block (857) below, a driving spring (858) is provided between the ratchet plate (856) and the driving rod (854), the top of the rotating head (82) is fixedly connected with a connecting block (821), the insert block (857) is plugged into the top of the connecting block (821), the insert block (857) is rotatably connected to the inside of the fixed head (81), the top of the rotating head (82) is penetrated by an unlocking rod (86) for movably connecting, the unlocking rod (86) is fixedly connected to the top of the movable plate (843), the unlocking rod (86) movably penetrates the insert block (857), and the unlocking rod (86) is used to control the separation of the ratchet plate (856) and the insert block (857).

6. The sampling mechanism of the grain sampling machine according to claim 5, characterized in that: The inner bottom of the sampling rod (3) is provided with a locking groove (852) adapted to the positioning base plate (851), a locking block (8511) is movably inserted into the circumferential side of the positioning base plate (851), and a locking spring (8512) is provided between the locking block (8511) and the positioning base plate (851).

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