A rapid weighing device for breeding cattle

By using a combination of supports and motor-driven rollers to form a conveyor belt for rapid weighing in cattle pens, the problems of time-consuming and labor-intensive weighing and stress response in existing technologies have been solved, enabling rapid and accurate weight measurement of cattle and refined breeding management.

CN122108322APending Publication Date: 2026-05-29SICHUAN ANIMAL SCI ACAD

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SICHUAN ANIMAL SCI ACAD
Filing Date
2026-03-17
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

In existing technologies, the weighing process for cattle is time-consuming and laborious, which can easily lead to stress reactions in cattle and personal injury to humans. Furthermore, it is difficult to collect regular and accurate weight data, which affects breeding efficiency and health management.

Method used

A rapid weighing device was designed, comprising a support frame, a load-bearing component, and a lifting weighing component. The load-bearing component is laid out in the cattle pen to make the cattle stand up and be weighed. A conveyor belt is formed by a combination of motor-driven rollers, which reduces manual labor and reduces stress on the cattle.

Benefits of technology

It enables rapid and accurate weight measurement of cattle within the pen, reducing the risk of personal injury and stress response in cattle, and providing sufficient weight data to support refined farming practices.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application provides a kind of fast weighing device for breeding cattle, belongs to the field of animal husbandry, including support, bearing assembly and jacking weighing assembly, the support is provided with two horizontal support arms to form a U-shaped opening;The bearing assembly is arranged on the support, and the bearing assembly spreads out from back to front along the U-shaped opening to form a bearing surface;The jacking weighing assembly is arranged on the support, which can lift the entire device and weigh it, allowing direct weighing of cattle in the cattle pen, by spreading the bearing assembly from back to front to contact the cattle leg, so that the cattle step onto the bearing surface, and then the jacking weighing assembly is used for weighing, without driving cattle out of the pen, reducing labor input, greatly reducing the risk of personal injury, and almost no stress reaction of cattle.The weighing device can adapt to the daily weighing of cattle, greatly reducing the possibility of stress reaction of cattle, providing sufficient weight data for breeders, and facilitating the promotion of fine breeding.
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Description

Technical Field

[0001] This invention belongs to the field of animal husbandry technology, and more specifically relates to a rapid weighing device for cattle. Background Technology

[0002] Body weight is a core objective indicator for cattle farmers to assess the growth, development, nutritional level, and health status of cattle. Regular and accurate individual weighing of cattle is a crucial and fundamental management task on cattle farms. Weight data is key to accurately monitoring the herd's growth curve, adjusting diet formulations and feeding strategies in a timely manner, ensuring cattle achieve ideal growth performance, and realizing efficient fattening or maintaining optimal milk production. It is also a crucial basis for group management and disease early warning. Furthermore, in breeding, body weight is an important selective trait, affecting the growth potential and production efficiency of offspring. Finally, slaughter weight directly determines the farm's sales revenue, and accurate weight data helps optimize slaughter timing and maximize profits.

[0003] As large animals, cattle are known for their temperamental nature and unpredictable movements. Driving them to a weighbridge for weighing is a tedious and laborious process that can easily cause severe stress. This stress not only leads to momentary distortions in weight data during weighing (such as defecation, urination, or agitation due to stress), but also affects their feeding and rest, and can even cause limb injuries, resulting in a sustained negative impact on production performance. Farmers find it difficult to accept the impact of weighing on cattle and the potential for personal injury, thus greatly reducing the frequency of weighing and resulting in a lack of weight data to support rational farming practices. Summary of the Invention

[0004] Based on this, the purpose of the present invention is to provide a rapid weighing device for cattle farming, including a support frame, a load-bearing component and a lifting weighing component, wherein the support frame is provided with two horizontal support arms, and the two horizontal support arms form a U-shaped opening with the support body;

[0005] The load-bearing component is mounted on the support frame and unfolds from back to front along the U-shaped opening to form a load-bearing surface for the cow to stand on; the lifting and weighing component is mounted on the support frame to lift the entire device and weigh it.

[0006] Furthermore, the load-bearing component includes a track and a roller, the track is provided with a groove, and the two tracks are arranged parallel to each other on the two horizontal support arms;

[0007] The two ends of the idler roller are movably disposed in the chute. Multiple idler rollers are arranged side by side. The ends of two adjacent idler rollers are rotatably connected by a figure-eight connecting piece, thereby forming an idler roller combination. The two ends of the idler roller combination are connected by a chain, which is disposed in the chute.

[0008] The chain is driven by a motor, which in turn drives the roller assembly to spread and retract along the U-shaped opening.

[0009] Furthermore, the two ends of the idler roller are connected to the slide groove via bearings, and the surface of the idler roller assembly is provided with a conveyor belt to form a bearing surface.

[0010] Furthermore, the bracket is also provided with a vertical support arm corresponding to the horizontal support arm, the horizontal support arm and the vertical support arm form an L-shaped support arm, the L-shaped support arm is provided with a track, the two tracks are arranged in parallel, and the track is provided with a sliding groove.

[0011] The two ends of the idler roller are movably disposed in the chute. Multiple idler rollers are arranged side by side. The ends of two adjacent idler rollers are rotatably connected by a figure-eight connecting piece, thereby forming an idler roller assembly. The two ends of the idler roller assembly are connected by a chain disposed in the chute.

[0012] The chain is driven by a motor, which in turn drives the roller assembly to spread and retract along the U-shaped opening.

[0013] Furthermore, both ends of the idler roller are connected to the slide groove via bearings. The bracket is provided with a take-up roller and a fixed crossbar. A conveyor belt is provided on the take-up roller. One end of the conveyor belt passes under the idler roller assembly, goes around the end of the idler roller assembly away from the take-up roller, and then connects to the fixed crossbar.

[0014] Furthermore, the bracket is provided with a first drive motor and a first drive shaft. The first drive motor is connected to the first drive shaft via a combination of belt and pulley. The first drive shaft is provided with a gear that meshes with the chain.

[0015] Furthermore, the horizontal support arm consists of a first support arm and a second support arm, which are rotatably connected and horizontally locked by a fixing pin located below the two support arms.

[0016] The track located on the horizontal support arm consists of a first track and a second track, which are respectively set on the first support arm and the second support arm.

[0017] Furthermore, the track located on the vertical support arm is provided with an extension section, and the extension section is provided with an arc-shaped transition section.

[0018] Furthermore, the track is provided with an auxiliary slide groove that is opposite to the slide groove, and the slide groove and the auxiliary slide groove cooperate to confine the bearing within them.

[0019] Furthermore, the weighing device includes 3 or 4 sets of lifting weighing components, each of which includes a fixed base, an electric push rod, and a weighing sensor.

[0020] The weighing sensor is a cantilever beam sensor. The fixed end of the cantilever beam sensor is connected to the drive rod of the electric push rod. The base of the electric push rod is connected to the fixed seat. The loading end of the cantilever beam sensor is connected to a ball head base. The fixed seat is mounted on the bracket.

[0021] Furthermore, a roller assembly is provided at the bottom of the bracket.

[0022] Furthermore, a guardrail is installed on the second arm.

[0023] Furthermore, the bracket is equipped with a winding wheel, the winding wheel is equipped with a connecting rope, the free end of the connecting rope is connected to the guardrail, the winding wheel is rotated by a crank handle, and the winding wheel is equipped with a locking buckle.

[0024] Furthermore, a second drive motor is also provided on the bracket for driving the take-up roller.

[0025] This invention provides a rapid weighing device for cattle, allowing for direct weighing of cattle within the pen. By spreading a support component and contacting the cattle's legs from back to front, the cattle are placed on the support surface, and then the weighing component is lifted for weighing. This eliminates the need to herd the cattle out of the pen, reducing labor input, significantly lowering the risk of personal injury, and virtually eliminating stress on the cattle. This weighing device is suitable for daily cattle weighing, greatly reducing the likelihood of stress reactions in cattle, providing farmers with sufficient weight data, and facilitating the promotion of refined farming practices. Attached Figure Description

[0026] This disclosure includes accompanying drawings, which are to be considered included in and form part of the specification, and together with the specification illustrate various exemplary embodiments, features, and aspects of the disclosure and serve to explain the principles of the disclosure. The invention will be more fully understood from the following detailed description taken in conjunction with the accompanying drawings. Wherein:

[0027] Figure 1 This is a schematic diagram of the overall structure of the weighing device in an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the conveyor belt being laid out in an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the state of cattle about to stand on the conveyor belt in an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the weighing device being retracted to its minimum size in an embodiment of the present invention;

[0031] Figure 5This is a schematic diagram of the structure and combination relationship of the load-bearing component in an embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram of the structure and positional relationship of the weighing part in an embodiment of the present invention;

[0033] Figure 7 This is a cross-sectional view of a portion of the structure when the conveyor belt is extended to the foremost edge in an embodiment of the present invention.

[0034] Figure 8 This is a schematic diagram of the connection structure between the first arm and the second arm in an embodiment of the present invention;

[0035] Figure 9 This is a schematic diagram showing the installation and function of the fixing pin in an embodiment of the present invention;

[0036] Figure 10 This is a cross-sectional view of a portion of the lifting and weighing component in an embodiment of the present invention;

[0037] Wherein: 11-Vertical support arm; 12-Horizontal support arm; 121-First support arm; 122-Second support arm; 21-Idler roller; 22-Conveyor belt; 23-Bearing; 24-Chain; 25-Railway; 251-Arc-shaped transition section; 252-Auxiliary chute; 26-Figure-8 connecting piece; 30-Lifting and weighing assembly; 31-Fixed base; 32-Electric push rod; 33-Cantilever beam sensor; 34-Ball head base; 41-Roller assembly; 42-Guardrail; 43-Crank handle; 44-Connecting rope; 51-Take-up roller; 52-Gear; 53-Guide gear; 54-Fixed pulley; 55-Fixing pin; 56-Second drive motor; 57-First drive motor; 58-First drive shaft; 59-Fixing crossbar. Detailed Implementation

[0038] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings, but the present invention is not limited to the following embodiments.

[0039] We know that regular weighing of cattle is of great importance, but it is difficult to do in actual production. This is because the existing weighing method, namely weighing via a weighbridge, is time-consuming and labor-intensive. Specifically, it takes 4-5 people to work together to drive a cow from the pen onto the weighbridge, and at least one operator familiar with cattle habits is needed to direct it properly. The operation requires one person to pull the rope from the front, another person to pull the cow's tail, push or pat its rump (experienced personnel are needed at the tail), and 2-3 people to hold the cow's body on both sides to prevent it from running away, because if the cow gets "tempered," it may run wildly and cause personal injury. It is especially difficult for the cow to get onto the weighbridge. Often, no matter how much you drive the cow, it will not lift its feet, or its legs will hit the edge of the weighbridge during the process of driving it onto the scale, which may cause leg injuries, stress reactions, and may also affect the original leveling of the weighbridge, resulting in inaccurate weighing.

[0040] Farmers are concerned about the impact of weighing on the growth and development of cattle, as well as the potential for personal injury during the weighing process. As a result, they reduce the frequency of weighing and often rely on experience to judge the approximate weight of cattle and make rough adjustments to the feeding strategy. This makes it difficult for many cattle farms to adopt refined farming practices.

[0041] The solution to this problem originated from an accidental discovery. When a worker placed a cart behind a cow, almost touching its legs, the cow would likely step back slightly before lifting its leg to step onto the cart. Since the cart wasn't fixed in place and the cow was only stepping on one leg, the cart slid backward and landed on the worker's leg. Based on experience, this phenomenon was likely due to the cow's knee bending and its leg angled forward when lifting its leg, making it easy to step onto the cart. If the cow's leg was blocked from the front, this would prevent the cow from lifting its leg, explaining why herding cows to the weighbridge is so difficult, sometimes even resulting in the cow kneeling on the weighbridge after lifting its leg. Further experiments revealed that it was easier for a cow to step onto a flat surface when lifting its leg backward than forward. Combining this with the structure of a calf scale, the weighing device was pushed into the cow pen for weighing, thus solving many problems associated with herding cows out for weighing.

[0042] Based on this, the present invention provides a rapid weighing device for cattle farming, which can weigh cattle inside the cattle pen, such as... Figure 1-10 As shown, it includes a support frame, a load-bearing component, and a lifting and weighing component 30. The support frame has two horizontal support arms 12, which form a U-shaped opening with the support body. The load-bearing component is operated at the U-shaped opening.

[0043] The bearing component is mounted on the support frame. The bearing component is laid out from back to front along the U-shaped opening to form a bearing surface for the cow to stand on. Here, "back and front" refers to the direction along the U-shaped opening, with the opening direction being forward. The lifting and weighing component 30 is mounted on the support frame to lift the entire device and perform weighing.

[0044] For clarity, the specific structure of chain 24 is not shown.

[0045] There are two points to consider when setting up the spreading support components. First, the height of the supporting surface of the spreading components should be as low as possible to reduce the height at which the cow lifts its leg. This height should be less than two-thirds of the length of the cow's lower leg. If it is higher than this, it will be more difficult for the cow to lift its leg to step on it. Second, when the spreading components come into contact with the cow's legs, they should contact the cow's hind legs one in front and one behind, so that the cow can step on the supporting surface with both hind legs respectively. When they make contact at the same time, the cow's willingness to lift its leg will be significantly reduced, and it may also fall to its knees. Based on this, the front end of the spreading components can be set in a stepped shape, or the spreading components can be pushed in at a slight angle.

[0046] As a preferred embodiment, the bearing assembly includes a track 25 and a roller 21. The track 25 is provided with a groove, and two tracks 25 are arranged in parallel on the two horizontal support arms 12.

[0047] The two ends of the idler roller 21 are movably disposed in the chute. Multiple idler rollers 21 are arranged side by side. The ends of two adjacent idler rollers 21 are rotatably connected by a figure-eight connecting piece 26, thereby forming an idler roller 21 assembly. The two ends of the idler roller 21 assembly are connected by a chain 24, which is disposed in the chute.

[0048] The chain 24 is driven by a motor, which in turn drives the roller 21 assembly to spread and retract along the U-shaped opening.

[0049] The two ends of the idler roller 21 are connected to the slide groove through bearings 23, and the combined surface of the idler roller 21 is provided with a conveyor belt 22 to form a bearing surface.

[0050] In this embodiment, a servo motor is preferably used, with a gear 52 on its drive shaft that meshes with the chain 24. The motor drives the chain 24 in both forward and reverse directions, thereby enabling the spreading and retraction of the idler roller 21 assembly. Spreading here means extending the idler roller chain under the cow's body until the cow is completely treading on the bearing surface. The conveyor belt 22 is in a connected state, covering the idler roller 21 assembly.

[0051] As a preferred embodiment, the bracket is also provided with a vertical support arm 11 corresponding to the horizontal support arm 12. The horizontal support arm 12 and the vertical support arm 11 form an L-shaped support arm. The L-shaped support arm is provided with a track 25. The two tracks 25 are arranged in parallel and are provided with a sliding groove. The track 25 provided on the L-shaped support arm is approximately L-shaped, and its turning point is arc-shaped to accommodate the movement of the idler roller 21 chain within it and prevent jamming.

[0052] The two ends of the idler roller 21 are movably disposed in the chute. Multiple idler rollers 21 are arranged side by side. The ends of two adjacent idler rollers 21 are rotatably connected by a figure-eight connecting piece 26, thereby forming an idler roller 21 assembly. The two ends of the idler roller 21 assembly are connected by a chain 24 disposed in the chute.

[0053] The chain 24 is driven by a motor, which in turn drives the roller 21 assembly to spread and retract along the U-shaped opening.

[0054] In this embodiment, two L-shaped support arms are arranged on both sides in parallel, and the track 25 is also L-shaped accordingly. Compared with the above embodiment, the tail of the track 25 in the above embodiment is actually placed vertically. The purpose is to reduce the length of the entire device. If the track 25 is long and straight, its length is at least the length of two cows. This is relatively cramped for the layout of existing cattle farm pens, and some compact cattle farms may not be able to enter.

[0055] As a preferred embodiment, the track 25 located on the vertical support arm 11 is provided with an extension section, and the extension section is provided with an arc-shaped transition section 251.

[0056] In this embodiment, the vertical track 25 is further optimized from a single vertical track to two rows through an arc transition section 251. This reduces the height of the vertical track 25, thereby lowering the center of gravity of the entire device and improving its mobility within the cattle farm.

[0057] It should also be noted that after the arc-shaped transition section 251, the direction of the idler roller 21 assembly is downward, which is also conducive to the connection between the chain 24 and the first and second ends of the idler roller 21 assembly, reducing the need for guide structures and simplifying the equipment to some extent. Regarding the connection of the chain 24, a fixed pulley 54 needs to be installed at the front end of the support arm for assistance, and a set of guide gears 53 needs to be installed at the lower end of the support for assistance as well.

[0058] As a preferred embodiment, the track 25 is provided with an auxiliary slide groove 252 that is opposite to the slide groove. The slide groove and the auxiliary slide groove 252 cooperate to confine the bearing 23 within it. The auxiliary slide groove 252 is also set according to the shape of the track 25 at the turning points and transition sections of the track 25.

[0059] On the one hand, due to the L-shaped turn and the arc transition section 251, the bearing 23 needs to be restricted to the opposite direction at the turn. On the other hand, it can prevent foreign objects from entering the groove.

[0060] As a preferred embodiment, the two ends of the idler roller 21 are connected to the slide groove via bearings 23. The bracket is provided with a take-up roller 51 and a fixed crossbar 59. The take-up roller 51 is provided with a conveyor belt 22. One end of the conveyor belt 22 passes under the idler roller 21 assembly, goes around the end of the idler roller 21 assembly away from the take-up roller 51, and then connects to the fixed crossbar 59.

[0061] In this embodiment, the take-up roller 51 is located near the bend of the L-shaped support arm, and its horizontal height is below the idler roller 21 assembly. When the idler roller 21 assembly is spread out, it can push the conveyor belt 22 to spread onto the idler roller 21 assembly to form a bearing surface.

[0062] In operation, the cows are in a pen, in a living state, with their heads connected to the bars by ropes. The entire device is first pushed into the pen, where two horizontal support arms 12 are positioned on either side of the cow. A servo motor drives the chain 24 to rotate, causing the rollers 21 to move towards the cow's legs. To facilitate the cow lifting its legs, the rollers contact the cow's hind legs one by one, allowing them to step onto the conveyor belt 22. It's important to note that the conveyor belt 22, which forms the bearing surface, remains stationary. This means that the cow's hind legs that first step onto the conveyor belt 22 can remain still without affecting the subsequent unfolding, making it easier for the cow to cooperate. This process continues until the cow is fully positioned on the conveyor belt 22.

[0063] After weighing, first lower the lifting weighing component 30, and let the rollers of the support frame contact the ground. At this time, the cow's legs are at their lowest point off the ground. Slowly move the entire weighing device backward, and with the help of the rope tethering the cow in front, drag it down slowly.

[0064] As a preferred embodiment, the bracket is provided with a first drive motor 57 and a first drive shaft 58. The first drive motor 57 is connected to the first drive shaft 58 through a combination of belt and pulley. The first drive shaft 58 is provided with a gear 52 that meshes with the chain 24.

[0065] In this embodiment, the first drive shaft 58 is connected to the bracket via a bearing 23, and two gears 52 are provided on the first drive shaft 58, which mesh with two chains 24 respectively.

[0066] As a preferred embodiment, the horizontal support arm 12 is composed of a first support arm 121 and a second support arm 122, which are rotatably connected and horizontally locked by a fixing pin 55 located below the two supports arm.

[0067] The track 25 located on the horizontal support arm 12 consists of a first track and a second track, which are respectively set on the first support arm 121 and the second support arm 122.

[0068] In this embodiment, the first arm 121 and the second arm 122 are hinged together, and a limiting plate is provided at the connection point. Specifically, a connecting plate is provided on each of the two arms, one of which has an arc-shaped limiting hole, and the other has a limiting rod that matches the arc-shaped limiting hole. This limits the consistency of the first arm 121 and the second arm 122 when they are unfolded, so that the fixing pin 55 can pass directly through the connection point of the two arms without being blocked.

[0069] To better limit the relative movement between the two outriggers, corresponding limiting cavities are set on the two outriggers, and the fixing pin 55 is installed in the limiting cavity. The fixing pin 55 can be driven by an electric cylinder or a pneumatic cylinder.

[0070] After the roller 21 assembly is retracted, the fixing pin 55 is released, and the second support arm 122 is rotated, further reducing the size of the entire device and making it easier to transport within the cattle farm.

[0071] As a preferred embodiment, a guardrail 42 is provided on the second support arm 122. The guardrail 42 is respectively provided on the two second support arms 122 to prevent cattle from falling off the conveyor belt 22 and to provide protection.

[0072] As a preferred embodiment, the bracket is provided with a winding wheel, the winding wheel is provided with a connecting rope 44, the free end of the connecting rope 44 is connected to the guardrail 42, the winding wheel is rotated by a crank 43, and the winding wheel is provided with a locking buckle.

[0073] In this embodiment, after weighing is completed, the idler roller 21 assembly is retracted, and then the second arm 122 section is also erected by turning the crank handle 43 and with manual assistance. The winding wheel is then locked by the locking buckle to ensure the stability of the second arm 122 section and facilitate transportation.

[0074] As a preferred embodiment, the weighing device includes 3 or 4 sets of lifting weighing components 30, each lifting weighing component 30 including a fixed base 31, an electric push rod 32, and a weighing sensor.

[0075] The weighing sensor is a cantilever beam sensor 33. The fixed end of the cantilever beam sensor 33 is connected to the drive rod of the electric push rod 32. The base of the electric push rod 32 is connected to the fixed seat 31. The loading end of the cantilever beam sensor 33 is connected to a ball head base 34. The fixed seat 31 is mounted on the bracket.

[0076] In this embodiment, based on the optimal use of existing technologies, a combination of 3 or 4 weighing sensors is used for weighing. Here, a cantilever beam sensor 33 is selected, which adopts a design with one end fixed and the other end loaded. It has a low profile and small size, which can effectively reduce the height of the entire support. It is equipped with standardized mounting holes and can be directly fixed to the support with bolts without the need for a complex centering structure, saving installation and debugging time.

[0077] If a combination of three load cells is selected, two of them will be installed at opposite positions below the second arm 122, and the other will be installed at the rear of the bracket, on the central axis of the bearing surface. If a combination of four load cells is selected, they will be installed on the two sides of the bracket, so that the bearing surface is axially symmetrical.

[0078] When the weighing component 30 is lifted, the loading end touches the ground, and the ball head base 34 of the loading end has a certain self-aligning function to improve the measurement accuracy.

[0079] An electronic level is installed on the support frame. When the weighing assembly 30 is lifted by the electric push rod 32, the level can be adjusted by referring to the electronic level. In actual operation, considering uneven ground and dirt, a pad can be placed under each ball head base 34.

[0080] As a preferred embodiment, the bottom of the support is provided with a roller assembly 41, preferably a roller assembly 41 with a brake, so that the weighing device itself has the ability to transfer weights.

[0081] As a preferred embodiment, the bracket is also equipped with a second drive motor 56 for driving the take-up roller 51. The second drive motor 56 is also a servo motor, which synchronously retracts the conveyor belt 22 when the idler roller 21 is retracted.

[0082] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, and the scope of the present invention is not limited to the embodiments described above. Many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. That is, those skilled in the art can make various changes and improvements to the present invention in form and detail, and all of these are considered to fall within the protection scope of the present invention. The terminology used herein is chosen to best explain the principles, practical applications, or improvements to the technology in the market of the various embodiments, or to enable those skilled in the art to understand the embodiments disclosed herein.

Claims

1. A rapid weighing device for livestock cattle, characterized in that: It includes a support frame, a load-bearing component, and a lifting and weighing component. The support frame has two horizontal arms, which form a U-shaped opening with the support body. The load-bearing component is mounted on the support frame and unfolds from back to front along the U-shaped opening to form a load-bearing surface for the cow to stand on; the lifting and weighing component is mounted on the support frame to lift the entire device and weigh it.

2. The rapid weighing device for livestock cattle according to claim 1, characterized in that: The load-bearing component includes a track and a roller. The track is provided with a groove, and two tracks are arranged parallel to each other on two horizontal support arms. The two ends of the idler roller are movably disposed in the chute. Multiple idler rollers are arranged side by side. The ends of two adjacent idler rollers are rotatably connected by a figure-eight connecting piece, thereby forming an idler roller combination. The two ends of the idler roller combination are connected by a chain, which is disposed in the chute. The chain is driven by a motor, which in turn drives the roller assembly to spread and retract along the U-shaped opening.

3. The rapid weighing device for livestock cattle according to claim 2, characterized in that: The two ends of the idler roller are connected to the slide groove through bearings, and the surface of the idler roller assembly is provided with a conveyor belt to form a bearing surface.

4. The rapid weighing device for livestock cattle according to claim 1, characterized in that: The bracket is also provided with a vertical support arm corresponding to the horizontal support arm. The horizontal support arm and the vertical support arm form an L-shaped support arm. The L-shaped support arm is provided with a track. The two tracks are arranged in parallel and the track is provided with a sliding groove. The two ends of the idler roller are movably disposed in the chute. Multiple idler rollers are arranged side by side. The ends of two adjacent idler rollers are rotatably connected by a figure-eight connecting piece, thereby forming an idler roller assembly. The two ends of the idler roller assembly are connected by a chain disposed in the chute. The chain is driven by a motor, which in turn drives the roller assembly to spread and retract along the U-shaped opening.

5. A rapid weighing device for livestock cattle according to claim 4, characterized in that: The two ends of the idler roller are connected to the slide groove via bearings. The bracket is provided with a take-up roller and a fixed crossbar. The take-up roller is provided with a conveyor belt. One end of the conveyor belt passes under the idler roller assembly, goes around the end of the idler roller assembly away from the take-up roller, and then connects to the fixed crossbar.

6. The rapid weighing device for livestock cattle according to claim 5, characterized in that: The bracket is provided with a first drive motor and a first drive shaft. The first drive motor is connected to the first drive shaft through a combination of belt and pulley. The first drive shaft is provided with a gear that meshes with the chain.

7. A rapid weighing device for livestock cattle according to claim 4, characterized in that: The horizontal support arm consists of a first support arm and a second support arm, which are rotatably connected and horizontally locked by a fixing pin located below the two support arms. The track located on the horizontal support arm consists of a first track and a second track, which are respectively set on the first support arm and the second support arm.

8. A rapid weighing device for livestock cattle according to claim 5, characterized in that: The track located on the vertical support arm is provided with an extension section, and the extension section is provided with an arc-shaped transition section.

9. A rapid weighing device for livestock cattle according to claim 7, characterized in that: The track is provided with an auxiliary slide groove that is opposite to the slide groove. The slide groove and the auxiliary slide groove cooperate to confine the bearing within them.

10. A rapid weighing device for livestock cattle according to any one of claims 1-9, characterized in that: The weighing device includes 3 or 4 sets of lifting weighing components, each lifting weighing component including a fixed base, an electric push rod, and a weighing sensor. The weighing sensor is a cantilever beam sensor. The fixed end of the cantilever beam sensor is connected to the drive rod of the electric push rod. The base of the electric push rod is connected to the fixed seat. The loading end of the cantilever beam sensor is connected to a ball head base. The fixed seat is mounted on the bracket.