Weighing module limiting mechanism

Abstract

This invention provides a weighing module limiting mechanism, relating to the field of bioreactor weighing systems. By sliding a limiting slider assembly onto a frame assembly, a driving component can cause the limiting slider assembly to reciprocate on the frame assembly. When weighing needs to be released, the driving component moves forward, causing the limiting slider assembly to move, which in turn moves the locking component away from the frame assembly, extending the locking component out of the core support assembly. The core support assembly is then in a horizontally floating state, able to move horizontally relative to the frame assembly, thus unlocking for weighing. When locking is required, the driving component moves in the opposite direction, causing the limiting slider assembly to move, which in turn moves the locking component closer to the frame assembly, extending the locking component into the core support assembly. The core support assembly can no longer move horizontally relative to the frame assembly, thus locking. This eliminates the need to disassemble the equipment, simplifying operation.

Description

Technical Field

[0001] This invention relates to the field of bioreactor weighing system technology, and in particular to a weighing module limiting mechanism. Background Technology

[0002] Bioreactors are commonly used equipment in industries such as biopharmaceuticals, bioculture, and biofermentation, and the weighing system is an important component of a bioreactor.

[0003] According to their structural layout, the weighing modules of existing bioreactors can be divided into two types: one is installed outside the equipment, and the other is installed inside the equipment. Since the bioreactor core will move slightly on the horizontal plane during operation, the weighing module needs to have a certain degree of horizontal floating in its structure to ensure that the weighing module accurately weighs the core.

[0004] However, in order to prevent damage to the weighing sensor from torsion movement, the weighing module with horizontal floating function needs to be locked in all stages of production, debugging and verification, transportation and acceptance. In addition, the weighing module installed inside the equipment needs to be disassembled before it can be locked and unlocked, which is more complicated and increases time and labor costs. Summary of the Invention

[0005] The purpose of this invention is to provide a weighing module limiting mechanism to alleviate the technical problem in the prior art where the weighing module installed inside the equipment can only be locked and unlocked after the equipment is removed, resulting in a relatively complicated operation.

[0006] The weighing module limiting mechanism provided by the present invention includes: a frame assembly, a weighing assembly, a mechanism support assembly, a limiting slider assembly, a locking assembly, and a driving assembly;

[0007] The weighing component is provided on the upper surface of the frame assembly. The top surface of the weighing component is connected to the bottom surface of the movement support assembly. The movement support assembly is used to install the movement unit, and the movement support assembly can move horizontally relative to the frame assembly in the weighing state.

[0008] The limiting slider assembly is slidably connected to the frame assembly, and the driving assembly is drively connected to the limiting slider assembly. The driving assembly is used to drive the limiting slider assembly to move on the frame assembly, so that the limiting slider assembly drives the locking assembly to switch between a locked state and an unlocked state. When in the locked state, the locking assembly extends into the movement support assembly to restrict the movement of the movement support assembly relative to the frame assembly. When in the unlocked state, the locking assembly extends out of the movement support assembly.

[0009] Furthermore,

[0010] The locking assembly includes a sliding roller, a roller pin, and a limiting pin;

[0011] One end of the roller pin is connected to the bottom of the limiting pin, and the roller pin is fitted with the sliding roller;

[0012] The limiting slider assembly includes a slider body;

[0013] The side wall of the slider body is provided with a guide elongated hole, the sliding roller slides in the guide elongated hole, and there is a height difference between the two ends of the guide elongated hole so that the sliding roller can move in the vertical direction.

[0014] Furthermore,

[0015] The weighing module limiting mechanism also includes a slider base;

[0016] The slider base is fixed to the frame assembly, and the bottom of the slider body is provided with a downward-facing sliding groove. The slider base extends into the sliding groove so that the slider body can move along the slider base.

[0017] Furthermore,

[0018] The sliding groove has a sliding protrusion extending inward from the groove opening. Both sides of the slider base are provided with locking grooves. The sliding protrusion extends into the locking groove to restrict the slider body from moving in the vertical direction.

[0019] Furthermore,

[0020] A limiting nut is provided at the end of the roller pin away from the limiting pin, and the limiting nut is used to restrict the sliding roller on the roller pin.

[0021] Furthermore,

[0022] The weighing module limiting mechanism also includes a limiting bracket assembly;

[0023] The limiting bracket assembly includes a limiting bracket plate and a first limiting spacer;

[0024] The bottom of the limiting bracket plate is connected to the frame assembly, and the top of the limiting bracket plate is provided with a first limiting spacer. The first limiting spacer is provided with a first guide hole, and the limiting pin moves up and down in the first guide hole.

[0025] Furthermore,

[0026] The weighing module limiting mechanism also includes a second limiting spacer;

[0027] The second limiting spacer is disposed on the movement support assembly, and the second limiting spacer is disposed above the first limiting spacer. The second limiting spacer is provided with a second guide hole, and the first guide hole and the second guide hole are aligned.

[0028] Furthermore,

[0029] The drive assembly includes a drive push rod, a push rod front support, a front pin, a push rod rear support, and a rear pin.

[0030] The side wall of the slider body is provided with a bracket fixing hole, the front end bracket of the push rod is connected to the slider body through the bracket fixing hole, and the driving end of the drive push rod is connected to the front end bracket of the push rod through the front end pin.

[0031] The frame assembly is provided with a push rod mounting plate, the push rod rear end bracket is disposed on the push rod mounting plate, and the fixed end of the drive push rod is connected to the push rod rear end bracket through the rear end pin.

[0032] Furthermore,

[0033] The weighing module limiting mechanism also includes a position sensor;

[0034] A sensor mounting hole is provided on the side wall of the slider body, and the position sensor is disposed in the sensor mounting hole. The position sensor is used to detect the position of the limit pin.

[0035] Furthermore,

[0036] The weighing assembly includes a weighing plate, a sensor body, a support plate, and a locking component;

[0037] The top surface of the weighing plate is connected to the mechanism support assembly, the bottom surface of the support plate is connected to the top surface of the frame assembly, the sensor body is fixed on the support plate, and the sensor body is used to detect the pressure on the support plate;

[0038] There is a gap between the bottom of the weighing plate and the top surface of the support plate. When the locking member is inserted into the gap, the pressure on the weighing plate is transmitted to the support plate through the locking member.

[0039] The weighing module limiting mechanism provided by this invention uses a limiting slider assembly that slides on a frame assembly. A driving component can cause the limiting slider assembly to reciprocate on the frame assembly. When weighing needs to be released, the driving component moves forward, causing the limiting slider assembly to move, which in turn moves the locking component away from the frame assembly, allowing the locking component to extend out of the mechanism support assembly. The mechanism support assembly is then in a horizontal floating state and can move horizontally relative to the frame assembly, thus unlocking for weighing. When locking is required, the driving component moves in the reverse direction, causing the limiting slider assembly to move, which in turn moves the locking component closer to the frame assembly, allowing the locking component to extend into the mechanism support assembly. The mechanism support assembly cannot move horizontally relative to the frame assembly, thus locking. By controlling the forward and reverse movements of the driving component, the limiting and unlocking of the weighing module can be achieved, simplifying the operation and alleviating the technical problem in existing technologies where weighing modules located inside the equipment can only be locked and unlocked after removing the equipment, leading to more complex operations. Attached Figure Description

[0040] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the overall structure of the weighing module limiting mechanism provided in an embodiment of the present invention;

[0042] Figure 2 This is a schematic diagram of the weighing module limiting mechanism provided in an embodiment of the present invention from another perspective;

[0043] Figure 3 This is a schematic diagram of the structure of the limiting bracket assembly and the locking assembly in the weighing module limiting mechanism provided in an embodiment of the present invention;

[0044] Figure 4 This is a schematic diagram of the locking component in the weighing module limiting mechanism provided in an embodiment of the present invention;

[0045] Figure 5 This is a schematic diagram of the limiting slider assembly in the weighing module limiting mechanism provided in an embodiment of the present invention;

[0046] Figure 6 This is a schematic diagram of the slider base in the weighing module limiting mechanism provided in an embodiment of the present invention;

[0047] Figure 7This is a schematic diagram of the installation structure of the weighing module limiting mechanism and the core unit provided in an embodiment of the present invention;

[0048] Figure 8 This is a schematic diagram of the weighing component in the weighing module limiting mechanism provided in an embodiment of the present invention;

[0049] Figure 9 This is a schematic diagram of the locking component in the weighing module limiting mechanism provided in an embodiment of the present invention;

[0050] Figure 10 This is a schematic diagram of the weighing component in the locking state of the weighing module limiting mechanism provided in an embodiment of the present invention;

[0051] Figure 11 This is a schematic diagram of the weighing component in the weighing module limiting mechanism provided in an embodiment of the present invention, in the weighing state.

[0052] Icons: 10-Mechanical unit; 100-Frame assembly; 110-Push rod mounting plate; 200-Weighing assembly; 210-Weighing plate; 220-Sensor body; 230-Support plate; 240-Locking component; 300-Mechanical support bracket assembly; 310-Second limit spacer; 400-Limit slider assembly; 410-Slider body; 411-Guide elongated hole; 412-Sliding groove; 413-Sliding protrusion; 414-Bracket fixing hole; 415-Sensor mounting hole ; 500-Locking assembly; 510-Sliding roller; 520-Roller pin; 530-Limit pin; 540-Limit nut; 600-Drive assembly; 610-Drive push rod; 620-Push rod front bracket; 630-Front pin; 640-Push rod rear bracket; 650-Rear pin; 700-Slider base; 710-Snap-fit ​​groove; 800-Limit bracket assembly; 810-Limit bracket plate; 820-First limit spacer; 900-Position sensor. Detailed Implementation

[0053] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0054] In order to accurately measure the weight of the core in traditional bioreactors, the weighing module needs to allow a certain amount of horizontal floating. However, in the production, commissioning, transportation, and acceptance stages, in order to prevent the weighing module from twisting and damaging the sensor, it is necessary to lock the weighing module and restrict its horizontal movement. However, since the weighing module is located inside the equipment, the equipment needs to be removed before the weighing module can be locked or unlocked, which is complicated and increases costs.

[0055] In view of this, such as Figure 1 , Figure 2 and Figure 7 As shown, the weighing module limiting mechanism provided in this embodiment can unlock or lock without disassembling the equipment. It includes: a frame assembly 100, a weighing component 200, a mechanism support assembly 300, a limiting slider assembly 400, a locking component 500, and a drive assembly 600. The weighing component 200 is provided on the upper surface of the frame assembly 100. The frame assembly 100 is composed of square tubes and flat plates connected by welded parts and is the basis of the weighing module structure. The frame assembly 100 has threaded holes of various specifications. The weighing component 200 is installed on the upper surface of the frame assembly 100 by bolt connection.

[0056] The weighing assembly 200 has through holes for bolt fixing on both its top and bottom surfaces. The top surface of the weighing assembly 200 is connected to the bottom surface of the movement support assembly 300. The movement support assembly 300 is provided with mounting holes for mounting the movement unit 10, and the movement support assembly 300 can move horizontally relative to the frame assembly 100 in the weighing state. Specifically, for example... Figure 8 , Figure 10 As shown, the weighing assembly 200 includes a weighing plate 210 at the top, a support plate 230 at the bottom, and a sensor body 220 in the middle. The bottom of the weighing plate 210 is provided with a frame. One end of the sensor body 220 is fixed to the support plate 230. The measuring end of the sensor body 220 extends into the frame, and the weighing plate 210 abuts against the measuring end of the sensor body 220, so that the gravity of the weighing plate 210 acts on the measuring end of the sensor body 220. When in the weighing state, since there is a gap between the frame at the bottom of the weighing plate 210 and the support plate 230, the weighing plate 210 can move horizontally relative to the support plate 230, thereby enabling the mechanism support assembly 300 connected to the weighing plate 210 to move horizontally relative to the frame assembly 100 connected to the support plate 230.

[0057] The limiting slider assembly 400 is slidably connected to the frame assembly 100, allowing the limiting slider assembly 400 to move on the surface of the frame assembly 100. The driving assembly 600 is drively connected to the limiting slider assembly 400, and the driving force generated by the driving assembly 600 drives the limiting slider assembly 400 to move on the frame assembly 100, so that the limiting slider assembly 400 drives the locking assembly 500 to switch between a locked state position and an unlocked state position. During the movement of the limiting slider assembly 400, the limiting slider assembly 400 drives the locking assembly 500 to move up and down. When in the locked state, the movement of the limiting slider assembly 400 drives the locking assembly 500 to extend into the movement support assembly 300 to restrict the movement of the movement support assembly 300 relative to the frame assembly 100. When in the unlocked state, the movement of the limiting slider assembly 400 drives the locking assembly 500 to extend out of the movement support assembly 300.

[0058] Additionally, it should be noted that the drive component 600 is connected to the electrical cabinet outside the equipment via a signal connection. The drive component 600 can receive control signals from the electrical cabinet. Corresponding to the operation of the drive component 600, the movement of the locking component 500 can be remotely controlled, and the unlocking and locking functions can be controlled.

[0059] The weighing module limiting mechanism provided in this embodiment uses a limiting slider assembly 400 slidably mounted on the frame assembly 100. The driving assembly 600 can drive the limiting slider assembly 400 to reciprocate on the frame assembly 100. When it is necessary to release the limit for weighing, the driving assembly 600 moves forward, causing the limiting slider assembly 400 to move, which in turn causes the locking assembly 500 to move away from the frame assembly 100. This causes the locking assembly 500 to extend out of the mechanism support assembly 300, which is in a horizontally floating state and can move horizontally relative to the frame assembly 100, thus unlocking for weighing. When locking is performed, the drive component 600 moves in the reverse direction, causing the limit slider component 400 to move, which in turn causes the locking component 500 to move closer to the frame component 100. This allows the locking component 500 to extend into the mechanism support component 300, preventing the mechanism support component 300 from moving horizontally relative to the frame component 100, thus completing the locking. By controlling the forward and reverse movement of the drive component 600, the limit locking or unlocking of the weighing module can be achieved, making the operation simpler. This alleviates the technical problem in the prior art where the weighing module located inside the equipment can only be locked and unlocked after the equipment is removed, resulting in a more complicated operation.

[0060] like Figure 3 , Figure 4 , Figure 5As shown, the locking assembly 500 further includes a sliding roller 510, a roller pin 520, and a limiting pin 530; the roller pin 520 has a columnar structure, one end of which extends into the bottom of the limiting pin 530, and the sliding roller 510 is sleeved on the roller pin 520, the diameter of the sliding roller 510 being larger than the diameter of the roller pin 520; the limiting slider assembly 400 includes a slider body 410; the side wall of the slider body 410 is provided with a guide elongated hole 411, the sliding roller 510 slides in the guide elongated hole 411, and the two ends of the guide elongated hole 411 have a height difference, so that the sliding roller 510 can move in the vertical direction.

[0061] Specifically, in order to drive the limit pin 530 to move up and down by moving the slider body 410, a guide hole 411 is made on the side wall of the slider body 410. The guide hole 411 is S-shaped, with a flat section at the bottom, a smooth gradient slope in the middle, and a flat section at the top. When the unlocking operation is performed, the drive assembly 600 drives the slider body 410 to slide inward. The sliding roller 510 located on the flat section at the top of the guide hole 411 rolls as the slider body 410 moves. The sliding roller 510 moves from the flat section at the top, through the smooth gradient slope in the middle, and finally reaches the flat section at the bottom of the guide hole 411. In the first segment, the sliding roller 510 moves downward in the vertical direction, thereby causing the limiting pin 530 to move downward. The limiting pin 530 extends out of the movement support assembly 300. Conversely, when the locking operation is performed, the drive assembly 600 drives the slider body 410 to slide outward. The sliding roller 510 located at the bottom plane segment of the guide hole 411 rolls under the movement of the slider body 410. The sliding roller 510 moves from the bottom plane segment through the middle gradient smooth slope and finally reaches the top plane segment of the guide hole 411. The sliding roller 510 moves upward in the vertical direction, thereby causing the limiting pin 530 to move upward. The limiting pin 530 extends into the movement support assembly 300.

[0062] like Figure 6 As shown, in order to limit the movement direction of the slider body 410, the weighing module limiting mechanism also includes a slider base 700; the slider base 700 is fixed on the frame assembly 100, and the bottom of the slider body 410 is provided with a downward-facing sliding groove 412. The slider base 700 extends into the sliding groove 412 so that the slider body 410 can move along the slider base 700.

[0063] The upper part of the slider base 700 has two smooth inclined surfaces, which make the top of the slider base 700 form an isosceles triangle structure. A connection hole is provided on the slider base 700. The connecting bolt passes through the connection hole and extends into the frame assembly 100, so that the slider base 700 can be fixed to the frame assembly 100.

[0064] Furthermore, the groove of the sliding groove 412 extends inward with a sliding protrusion 413, and both sides of the slider base 700 are provided with locking grooves 710. The sliding protrusion 413 extends into the locking groove 710 to restrict the slider body 410 from moving in the vertical direction.

[0065] Specifically, the two sides of the slider base 700 are recessed inward to form a snap-fit ​​groove 710. A slider protrusion is provided at the opening of the sliding groove 412 of the slider body 410. During installation, the slider base 700 extends into the sliding groove 412 along the length of the sliding groove 412. The sliding protrusion 413 at the opening of the sliding groove 412 extends into the snap-fit ​​groove 710, so that the slider body 410 cannot move in the vertical direction. The slider body 410 can only move along the direction of the slider base 700.

[0066] Furthermore, in order to prevent the sliding roller 510 from coming off the roller pin 520, a limit nut 540 is provided at the end of the roller pin 520 away from the limit pin 530. The limit nut 540 blocks the sliding roller 510 and restricts the sliding roller 510 on the roller pin 520.

[0067] Furthermore, the weighing module limiting mechanism also includes a limiting bracket assembly 800; the limiting bracket assembly 800 includes a limiting bracket plate 810 and a first limiting spacer 820; the bottom of the limiting bracket plate 810 is connected to the frame assembly 100, and the top of the limiting bracket plate 810 is provided with the first limiting spacer 820, the first limiting spacer 820 is provided with a first guide hole, and the limiting pin 530 moves up and down in the first guide hole.

[0068] Specifically, the limiting bracket plate 810 has a Z-shaped structure. The left and right horizontal sections of the limiting bracket plate 810 are fixed to the frame assembly 100 by bolts. The middle part of the limiting bracket plate 810 protrudes and a through hole is opened in the middle part of the limiting bracket plate 810. The first limiting spacer 820 is installed in the through hole. The middle part of the first limiting spacer 820 forms a first guide hole. The first guide hole provides guidance for the limiting pin 530, and the limiting pin 530 moves in the first guide hole.

[0069] Furthermore, the weighing module limiting mechanism also includes a second limiting sleeve 310; the second limiting sleeve 310 is disposed on the mechanism support assembly 300, the second limiting sleeve 310 is disposed above the first limiting sleeve 820, the second limiting sleeve 310 is provided with a second guide hole, and the first guide hole and the second guide hole are aligned.

[0070] Specifically, a second limiting sleeve 310 is provided on the movement support assembly 300. The second limiting sleeve 310 has the same structure and shape as the first limiting sleeve 820. The middle part of the second limiting sleeve 310 forms a second guide hole, so that the limiting pin 530 can move up and down in the first guide hole and the second guide hole.

[0071] In addition, the end of the limiting pin 530 has a certain taper, such as a triangular cone or a cone shape, to serve as a limiting guide.

[0072] Furthermore, the drive assembly 600 includes a drive push rod 610, a push rod front end bracket 620, a front end pin 630, a push rod rear end bracket 640, and a rear end pin 650. The drive push rod 610 can be specifically configured as a drive motor, or as a cylinder or hydraulic cylinder. A bracket fixing hole 414 is provided on the side wall of the slider body 410. The push rod front end bracket 620 is fixed to the slider body 410 by bolts and the bracket fixing hole 414. The drive end of the drive push rod 610 is connected to the push rod front end bracket 620 through the front end pin 630. The frame assembly 100 is horizontally provided with a push rod mounting plate 110. The push rod rear end bracket 640 is set on the push rod mounting plate 110. The fixed end of the drive push rod 610 is connected to the push rod rear end bracket 640 through the rear end pin 650. The thrust generated by the drive push rod 610 acts on the slider body 410, driving the slider body 410 to move along the sliding base.

[0073] Furthermore, the weighing module limiting mechanism also includes a position sensor 900; a sensor mounting hole 415 is provided on the side wall of the slider body 410, and the position sensor 900 is disposed in the sensor mounting hole 415. The position sensor 900 is used to detect the position of the limiting pin 530.

[0074] Specifically, the position sensor 900 is configured as a proximity switch and installed on the slider body 410. The position sensor 900 detects the position of the limit pin 530 and transmits it to the background controller. For example, when a limit command is received, the position of the current limit pin 530 is detected. If it is in the limit position, the current status of the limit pin 530 is indicated as an error, and the limit command is terminated. If a release limit command is received, the position of the triangular limit pin 530 is detected. If it is in the unlimited position, the release limit command is terminated.

[0075] like Figure 8 , Figure 9 , Figure 10 , Figure 11As shown, the weighing assembly 200 further includes a weighing plate 210, a sensor body 220, a support plate 230, and a locking member 240; the top surface of the weighing plate 210 is connected to the mechanism support assembly 300, the bottom surface of the support plate 230 is connected to the top surface of the frame assembly 100, the sensor body 220 is fixed on the support plate 230, and the sensor body 220 is used to detect the pressure on the support plate 230; there is a gap between the bottom of the weighing plate 210 and the top surface of the support plate 230, and when the locking member 240 is inserted into the gap, the pressure on the weighing plate 210 is transmitted to the support plate 230 through the locking member 240.

[0076] Specifically, the weighing component 200 is the core structure of the weighing system. The weighing plate 210 located above is connected to the mechanism support assembly 300 by bolts, and the support plate 230 located below is connected to the frame assembly 100 by bolts. There is a gap between the frame below the weighing plate 210 and the top surface of the support plate 230. The measuring end of the sensor body 220 extends into the frame. The weight of the weighing plate 210 acts on the measuring end of the sensor to perform weighing. The mechanism support assembly 300 can move horizontally relative to the frame assembly 100, has a floating function, and is in the weighing state.

[0077] The locking component 240 is specifically configured as a locking patch. After the locking component 240 is inserted into the gap, it can raise the weighing plate 210, so that the weighing plate 210 and the support plate 230 form a rigid connection through the locking iron piece. The load cell is not under force, the weighing module does not work, and it is in a locked state. The locking and unlocking of the weighing can be completed by setting the locking component 240.

[0078] The weighing module limiting mechanism provided in this embodiment can achieve limit locking or unlocking of the weighing module of the bioreactor equipment without disassembling the equipment and weighing module. It is applicable to bioreactors of different specifications, increases the intelligence of the equipment, reduces the adverse effects caused by human factors, and shortens the production and commissioning cycle.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A weighing module limiting mechanism, characterized in that, include: Frame assembly (100), weighing assembly (200), mechanism support assembly (300), limit slider assembly (400), locking assembly (500) and drive assembly (600); The weighing component (200) is provided on the upper surface of the frame assembly (100). The top surface of the weighing component (200) is connected to the bottom surface of the movement support assembly (300). The movement support assembly (300) is used to install the movement unit (10), and the movement support assembly (300) can move horizontally relative to the frame assembly (100) in the weighing state. The limiting slider assembly (400) is slidably connected to the frame assembly (100), and the driving assembly (600) is drively connected to the limiting slider assembly (400). The driving assembly (600) is used to drive the limiting slider assembly (400) to move on the frame assembly (100), so that the limiting slider assembly (400) drives the locking assembly (500) to switch between a locked state and an unlocked state. When in the locked state, the locking assembly (500) extends into the movement support assembly (300) to restrict the movement of the movement support assembly (300) relative to the frame assembly (100). When in the unlocked state, the locking assembly (500) extends out from the movement support assembly (300). The locking assembly (500) includes a sliding roller (510), a roller pin (520), and a limiting pin (530). One end of the roller pin (520) is connected to the bottom of the limiting pin (530), and the roller pin (520) is fitted with the sliding roller (510). The limiting slider assembly (400) includes a slider body (410). The side wall of the slider body (410) is provided with a guide elongated hole (411), the sliding roller (510) slides in the guide elongated hole (411), and the two ends of the guide elongated hole (411) have a height difference so that the sliding roller (510) can move in the vertical direction. The weighing module limiting mechanism also includes a slider base (700). The slider base (700) is fixed to the frame assembly (100), and the bottom of the slider body (410) is provided with a downward-facing sliding groove (412). The slider base (700) extends into the sliding groove (412) so that the slider body (410) can move along the slider base (700). The sliding groove (412) has a sliding protrusion (413) extending inward from the groove opening. Both sides of the slider base (700) are provided with snap-fit ​​grooves (710). The sliding protrusion (413) extends into the snap-fit ​​groove (710) to restrict the slider body (410) from moving in the vertical direction. The weighing module limiting mechanism also includes a limiting bracket assembly (800). The limiting bracket assembly (800) includes a limiting bracket plate (810) and a first limiting spacer (820). The bottom of the limiting bracket plate (810) is connected to the frame assembly (100), and the top of the limiting bracket plate (810) is provided with a first limiting sleeve (820). The first limiting sleeve (820) is provided with a first guide hole, and the limiting pin (530) moves up and down in the first guide hole. The weighing module limiting mechanism also includes a second limiting spacer (310). The second limiting sleeve (310) is disposed on the movement support assembly (300), the second limiting sleeve (310) is disposed above the first limiting sleeve (820), the second limiting sleeve (310) is provided with a second guide hole, and the first guide hole and the second guide hole are aligned.

2. The weighing module limiting mechanism according to claim 1, characterized in that, A limiting nut (540) is provided at the end of the roller pin (520) away from the limiting pin (530), and the limiting nut (540) is used to restrict the sliding roller (510) on the roller pin (520).

3. The weighing module limiting mechanism according to claim 1, characterized in that, The drive assembly (600) includes a drive push rod (610), a push rod front end bracket (620), a front end pin (630), a push rod rear end bracket (640), and a rear end pin (650). The side wall of the slider body (410) is provided with a bracket fixing hole (414). The front end bracket (620) of the push rod is connected to the slider body (410) through the bracket fixing hole (414). The driving end of the drive push rod (610) is connected to the front end bracket (620) of the push rod through the front end pin (630). The frame assembly (100) is provided with a push rod mounting plate (110), and the push rod rear end bracket (640) is provided on the push rod mounting plate (110). The fixed end of the drive push rod (610) is connected to the push rod rear end bracket (640) through the rear end pin (650).

4. The weighing module limiting mechanism according to claim 1, characterized in that, The weighing module limiting mechanism also includes a position sensor (900). A sensor mounting hole (415) is provided on the side wall of the slider body (410), and the position sensor (900) is disposed in the sensor mounting hole (415). The position sensor (900) is used to detect the position of the limit pin (530).

5. The weighing module limiting mechanism according to claim 1, characterized in that, The weighing assembly (200) includes a weighing plate (210), a sensor body (220), a support plate (230), and a locking member (240). The top surface of the weighing plate (210) is connected to the mechanism support assembly (300), the bottom surface of the support plate (230) is connected to the top surface of the frame assembly (100), the sensor body (220) is fixed on the support plate (230), and the sensor body (220) is used to detect the pressure on the support plate (230); There is a gap between the bottom of the weighing plate (210) and the top surface of the support plate (230). When the locking member (240) is inserted into the gap, the pressure on the weighing plate (210) is transmitted to the support plate (230) through the locking member (240).

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