Method for measuring screw rod torque set value of pre-filling and sealing container screw rod labeling machine

Abstract

The invention discloses a method for measuring a screw rod torque set value of a screw rod labeling machine for a pre-filled container. The method comprises the following steps: testing through a simulation test device to obtain a simulation no-load torque value T1 when the pre-filled container is rotated by a simulation screw rod labeling machine and the pre-filled container is not assembled; testing through a simulation test device to obtain a simulation upper limit torque value T2 when the pre-filled container is screwed and assembled by the simulation screw rod labeling machine; the actual screwing torque value T3 meets the formula that T3 = T2-T1; acquiring an actual no-load torque value T4 when the pre-filling and sealing container is rotated and not assembled by the screw rod labeling machine; the actual upper limit torque value T5 when the screw rod labeling machine screws and assembles the pre-filled and sealed container meets the formula that T5 is equal to T3 + T4. The method for measuring the screw rod torque set value of the screw rod labeling machine for the pre-filled container has the advantages that the torque is prevented from being measured and adjusted on the screw rod labeling machine, the testing process is simplified, the number of times of replacing specification components of the screw rod labeling machine and the number of times of re-testing when the specification components are replaced are reduced, and waste of packing materials in the testing process is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of food and medicine packaging machinery and equipment, and in particular to a method for measuring a set value of a screw rod torque of a screw rod labeling machine for pre-filled containers. Background Art

[0002] The twist rod labeling machine is a device that realizes the assembly of push rods and the application of labels. This device has two functions: one is to assemble the push rods, and the other is to apply labels. The assembly of the push rod can be controlled in two ways: one is to control the number of turns of the twist rod, and the other is to control the torque of the twist rod.

[0003] The first method is to screw the push rod into the stopper by setting and adjusting the number of rotations of the push rod. The push rod is then fixed and the belt rotated to drive the bottle body to rotate the corresponding number of rotations to screw the push rod into the stopper, thereby achieving the assembly function of the push rod. Since it is uncertain whether the threads on the push rod are aligned with the threads in the bottle stopper, in order for the push rod to be completely screwed into the stopper, the number of rotations of the bottle body is generally set to be greater than the number of rotations corresponding to the stopper threads. This will result in over-tightening. If the number of rotations of the bottle body is set according to the number of rotations corresponding to the stopper threads, under-tightening will occur. Both over-tightening and under-tightening are signs of unqualified products (over-tightening will cause the stopper to move, which may affect the sterile environment of the medicine inside, and under-tightening may cause the push rod to fall, resulting in the risk of missing parts).

[0004] The second method is to screw the push rod in by setting and adjusting the maximum torque of the bottle body rotation servo. This method can avoid over-tightening or under-tightening caused by misalignment between the push rod thread and the stopper thread. The rod is tightened according to torque. Regardless of the number of turns, the rod is stopped as soon as the set maximum torque is reached, ultimately achieving a screw-in effect that is neither under-tightened nor over-tightened.

[0005] Using torque to control the screwing effect requires an upper limit for the screwing servo torque that neither under-tightens nor over-tightens. Obtaining this parameter is crucial. A method for directly determining the screwing servo torque setting (the sum of the device platform resistance and the screwing torque) for the packaging material that ensures screwing effectiveness is employed through trial and error on a screwing labeling machine. For example, the method and device for threading syringe plungers, disclosed in Application No. 201010189329.9, measures and adjusts torque directly on the device. However, changes in packaging material specifications require replacement of the specified components. Each replacement requires re-monitoring and re-testing to obtain the screwing servo torque setting, making the monitoring and re-testing process cumbersome. Furthermore, if operating conditions change due to maintenance, repair, or extended operation, re-testing and re-updating the screwing servo torque setting is necessary. This approach, however, does not guarantee universal reliability. The trial and error process also consumes significant amounts of packaging material, and once screwed (potentially compromising the sterile environment), these packaging materials cannot be reused and must be discarded.

[0006] Another example Figure 3 and Figure 4 The illustrated embodiment shows a screw rod labeling machine, wherein the push rod and the bottle body are fed through the guide groove and the clamp on the turntable 5. After being fed to the screw rod station, the screw rod belt 6 and the screw rod rubber wheel 7 are used to rotate the bottle body to screw in the push rod by the linear speed difference between the screw rod belt 6 and the screw rod rubber wheel 7 and the turntable 5, wherein the screw rod belt 6 and the screw rod rubber wheel 7 are both controlled by a servo. First, the screw rod belt 6 performs pre-tightening, screwing the push rod into the rubber plug to achieve under-tightening of the push rod, and then the rubber wheel 7 performs re-tightening. If the required screw rod effect is achieved, the corresponding servo stops rotating. If not, the rubber wheel 7 performs re-tightening again to achieve the required screw rod effect. In order to verify the screw rod effect, a corresponding visual inspection station will be used to inspect the screw rod effect after the screw rod station completes the screwing. Finally, the function and performance of the torque-controlled screw rod are realized. However, it is not convenient to directly study and test the platform resistance and screw rod torque on the screw rod labeling machine for the following reasons: a) If you want to research and test packaging materials of various specifications on a twist-rod labeling machine, you need to dismantle and replace the pressing plate, push rod feeding fixture, and bottle feeding guide groove on the twist-rod labeling machine. One set of parts can only be used to study one specification of packaging material, and the installation and operation of the test process are relatively cumbersome; b) When testing the resistance of the twist rod labeling machine and the torque of the twist rod, the device turntable 5 needs to be rotated to a position tangent to the twist rod rubber-coated wheel 7, and then the servo of the twist rod rubber-coated wheel 7 is controlled separately. If only the pre-filled needle bottle body is placed in the bottle body feeding guide groove, the device platform resistance can be obtained by monitoring the real-time torque of the twist rod rubber-coated wheel 7 servo. If the pre-filled needle bottle body is placed in the bottle body feeding guide groove, and the push rod is placed on the push rod feeding fixture, the sum of the device platform resistance + twist rod torque to ensure the twist rod effect can be tried by setting the maximum torque of the twist rod rubber-coated wheel 7 servo. However, this method has two problems. First, the feeding of the bottle body and the push rod is difficult to operate. Second, the resistance of the twist rod labeling machine is the resistance when the equipment is static, which is different from the equipment resistance during the operation of the equipment linkage. c) Directly monitor the machine's resistance during dynamic operation and try to calculate the sum of the resistance and the torque of the twist rod. The resistance can be monitored by feeding the bottle through the feeding guide, while the push rod does not feed the bottle. The rubber-coated twist rod wheel 7 rotates continuously and the servo torque is monitored. Trying to calculate the sum of the resistance and the torque of the twist rod requires trial and error, which is not very convenient due to the structure of the machine. d) If the servo torque value of the rubber-coated wheel 7 is determined by directly testing the sum of the equipment resistance and the torque of the twist rod, the result can be directly applied, but retesting is required every time the specifications are changed. In addition, if the equipment operating conditions change (such as maintenance, modification, or long-term operation), the parameter needs to be retested and adjusted. This testing process is tedious and wasteful, and it is relatively wasteful of packaging materials. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide a method for measuring the torque setting value of the twist rod labeling machine for pre-filled containers, which avoids measuring and adjusting the torque on the twist rod labeling machine, simplifies the testing process, reduces the number of times the twist rod labeling machine replaces specification parts and the number of times retesting when replacing specification parts, and reduces the waste of packaging materials during the testing process.

[0008] In order to solve the above technical problems, the present invention adopts the following technical solutions: A method for determining a torque setting value of a twist rod of a pre-filled container twist rod labeling machine comprises the following steps: S1. Using a simulation test device, obtain a simulated no-load torque value T1 when a twist rod labeling machine rotates a pre-filled container without assembling the pre-filled container; S2. Using a simulation test device, obtain a simulated upper limit torque value T2 when a twist rod labeling machine is used to twist and assemble a pre-filled container; S3, actual screwing torque value T3, satisfies T3=T2-T1; S4, obtaining an actual no-load torque value T4 of the twist rod labeling machine when rotating the pre-filled container and not assembling the pre-filled container; S5. The actual upper limit torque value T5 of the screw rod labeling machine when screwing and assembling the pre-filled container satisfies the following: T5=T3+T4.

[0009] As a further improvement of the above technical solution: In S1 and S2, the speed of rotating the prefilled container is the same, set to V1. In S4, the speed of rotating the prefilled container is set to V2, satisfying V2=V1.

[0010] In the above S2, the simulated upper limit torque value T2 is based on the standard that the pre-filled container is screwed and assembled without over-tightening or under-tightening.

[0011] In S2, the simulated upper limit torque value T2 is obtained through multiple assignments and simulation test verifications.

[0012] The multiple assignments are performed in ascending order.

[0013] The prefilled container is a prefilled needle assembled by threaded connection of a push rod and a bottle body.

[0014] The simulation test device and the twist rod labeling machine both include a twisting mechanism and a pushing mechanism, the twisting mechanism is used to carry and rotate the bottle body, and the pushing mechanism is used to dock the push rod with the bottle body and push the push rod into the bottle body. The simulated no-load torque value T1 is a test value of the twisting mechanism of the simulation test device when the bottle body is carried and rotated and the push rod is not docked with the bottle body. The simulated upper limit torque value T2 is a test value of the twisting mechanism of the simulation test device when the bottle body is carried and rotated and the push rod is docked and assembled with the bottle body. The actual no-load torque value T4 is a test value of the twisting mechanism of the twist rod labeling machine when the bottle body is carried and rotated and the push rod is not docked with the bottle body.

[0015] The screwing mechanism includes a supporting frame and a rotating assembly for rotating the bottle body. The supporting frame is provided with a placing portion for vertically placing the bottle body, and the pushing mechanism is arranged above the placing portion.

[0016] The rotating assembly includes a roller and a rotating motor. The roller is movably arranged on one side of the placement portion and is used to press against the outer wall of the bottle body and rotate the bottle body. The rotating motor is connected to the roller to drive the roller to rotate.

[0017] The pushing mechanism includes a lifting frame and a fixing component arranged on the lifting frame and used for fixing the push rod.

[0018] Compared with the prior art, the advantages of the present invention are: The present invention provides a method for determining a set value of a twisting rod torque for a prefilled container twisting rod labeling machine. The method involves obtaining a simulated no-load torque value T1 and a simulated upper limit torque value T2 of the twisting rod labeling machine using a simulation test device, and calculating T3. Thus, by simply obtaining the actual no-load torque value T4 on the twisting rod labeling machine, the actual upper limit torque value T5 of the twisting rod labeling machine when twisting and assembling prefilled containers can be calculated. Compared with the existing technology in which the simulated no-load torque value T1, the simulated upper limit torque value T2 and the actual no-load torque value T4 are all obtained on the twist rod labeling machine, by first testing and obtaining the simulated no-load torque value T1 and the simulated upper limit torque value T2 on the simulation test device and calculating T3, and then obtaining the actual no-load torque value T4 and calculating T5 on the twist rod labeling machine, on the one hand, it is avoided to measure and adjust the torque on the twist rod labeling machine, thereby avoiding the need to disassemble and replace relevant specification components such as the pressure plate, push rod feeding fixture, bottle body feeding guide groove on the twist rod labeling machine, thereby simplifying the testing process; on the other hand, it is reduced the number of times the twist rod labeling machine replaces specification components and the number of retests when replacing specification components, thereby reducing the waste of packaging materials during the testing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The present invention is a flow chart of a method for determining a set value of a twisting rod torque of a twisting rod labeling machine for prefilled containers.

[0020] Figure 2 The present invention is a schematic diagram of a simulation test device for a method for determining a twist rod torque setting value of a twist rod labeling machine for prefilled containers or a structural diagram of a twist rod labeling machine.

[0021] Figure 3 It is a three-dimensional structural diagram of an existing twist rod labeling machine.

[0022] Figure 4 It is a partial structural diagram of an existing twist rod labeling machine.

[0023] The numbers in the figure represent: 1. Push rod; 2. Bottle body; 3. Twisting mechanism; 31. Carrying frame; 311. Placement part; 32. Rotating assembly; 321. Roller; 322. Rotating motor; 4. Pushing mechanism; 41. Lifting frame; 42. Fixing assembly; 5. Turntable; 6. Twisting rod belt; 7. Rubber-coated wheel. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0027] In the present invention, unless otherwise expressly specified or limited, terms such as "assemble," "connect," "connect," and "fix" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0028] Figure 1 An embodiment of a method for determining a set value of a twisting rod torque of a prefilled container twisting rod labeling machine according to the present invention is shown. The method for determining a set value of a twisting rod torque of a prefilled container twisting rod labeling machine according to this embodiment includes the following steps: S1. Obtain, by means of a simulation test device, a simulated no-load torque value T1 when the twist rod labeling machine is simulated to rotate a pre-filled container without assembling the pre-filled container; the simulation test device is testing a no-load operation process of the simulated test device when the twist rod labeling machine is simulated to rotate a pre-filled container without assembling the pre-filled container.

[0029] S2. Using a simulation test device, obtain a simulated upper limit torque value T2 when a twist rod labeling machine is used to twist and assemble a pre-filled container; S3, actual screwing torque value T3, satisfies T3=T2-T1; S4, obtaining an actual no-load torque value T4 of the twist rod labeling machine when rotating the pre-filled container and not assembling the pre-filled container; S5. The actual upper limit torque value T5 of the screw rod labeling machine when screwing and assembling the pre-filled container satisfies the following: T5=T3+T4.

[0030] The present method for determining the set value of the twisting rod torque of a prefilled container twisting rod labeling machine obtains a simulated no-load torque value T1 and a simulated upper limit torque value T2 of the simulated twisting rod labeling machine through testing on a simulation test device, and calculates T3. In this way, by simply obtaining the actual no-load torque value T4 on the twisting rod labeling machine, the actual upper limit torque value T5 of the twisting rod labeling machine when twisting and assembling prefilled containers can be calculated. Compared with the existing technology in which the simulated no-load torque value T1, the simulated upper limit torque value T2 and the actual no-load torque value T4 are all obtained on the twist rod labeling machine, by first testing and obtaining the simulated no-load torque value T1 and the simulated upper limit torque value T2 on the simulation test device and calculating T3, and then obtaining the actual no-load torque value T4 and calculating T5 on the twist rod labeling machine, on the one hand, it is avoided to measure and adjust the torque on the twist rod labeling machine, thereby avoiding the need to disassemble and replace relevant specification components such as the pressure plate, push rod feeding fixture, bottle body feeding guide groove on the twist rod labeling machine, thereby simplifying the testing process; on the other hand, it is reduced the number of times the twist rod labeling machine replaces specification components and the number of retests when replacing specification components, thereby reducing the waste of packaging materials during the testing process.

[0031] Furthermore, in this embodiment, the prefilled container rotates at the same speed, V1, in S1 and S2. The prefilled container rotates at V2 in S4, satisfying V2 = V1. The simulation test device simulates the prefilled container rotating at the same speed, V1, in S1 and S2, for the twist-rod labeler to rotate the prefilled container. This means the prefilled container rotates at a constant speed. Furthermore, in S4, the twist-rod labeler also rotates at V1, preventing the accuracy of the test results from being affected by different rotation speeds.

[0032] Furthermore, in this embodiment, the simulated upper limit torque value T2 in S2 is based on the standard that the prefilled container can be screwed and assembled without over-tightening or under-tightening. Thus, the prefilled container can be screwed and assembled with the actual upper limit torque value T5 obtained in the subsequent test, which can ensure that the prefilled container can be screwed and assembled without over-tightening or under-tightening.

[0033] Furthermore, in this embodiment, in S2, the simulated upper limit torque value T2 is obtained through multiple assignments and simulation test verifications. Figure 1 As shown, in S2, an upper limit torque value T is first assigned to the simulation test device. When the simulation test device rotates to this upper limit torque value T, the screwing assembly effect is checked. If it is under-tightened, the upper limit torque value T is increased; if it is over-tightened, the upper limit torque value T is reduced. The screwing assembly is restarted from the separated state of the pre-filled container and the push rod until there is no under-tightening or over-tightening. The upper limit torque value T at this time is the simulated upper limit torque value T2.

[0034] Furthermore, in this embodiment, multiple assignments are performed in ascending order, which can reduce the number of times the assignment is twisted, and can also prevent damage to the pre-filled container due to over-twisting.

[0035] Furthermore, in this embodiment, the prefilled container is a prefilled needle assembled by threading a push rod 1 and a bottle body 2. In S1, S2, and S4, rotating the prefilled container is rotating the bottle body 2. The push rod 1 performs a lifting motion relative to the bottle body 2.

[0036] Furthermore, in this embodiment, if Figure 2 As shown, the simulation test device and the twist rod labeling machine both include a twisting mechanism 3 and a pushing mechanism 4. The twisting mechanism 3 is used to carry and rotate the bottle body 2, and the pushing mechanism 4 is used to dock the push rod 1 with the bottle body 2 and push the push rod 1 into the bottle body 2. The simulated no-load torque value T1 is a test value of the twisting mechanism 3 of the simulation test device when the bottle body 2 is carried and rotated and the push rod 1 is not docked with the bottle body 2. The simulated upper limit torque value T2 is a test value of the twisting mechanism 3 of the simulation test device when the bottle body 2 is carried and rotated and the push rod 1 is docked and assembled with the bottle body 2. The actual no-load torque value T4 is a test value of the twisting mechanism 3 of the twist rod labeling machine when the bottle body 2 is carried and rotated and the push rod 1 is not docked with the bottle body 2.

[0037] Furthermore, in this embodiment, the screwing mechanism 3 includes a carrier 31 and a rotating assembly 32 for rotating the bottle body 2. The carrier 31 is provided with a placement portion 311 for vertically placing the bottle body 2, and the pushing mechanism 4 is disposed above the placement portion 311. Specifically, the placement portion 311 is a through-hole extending vertically through the bottle body 2. The bottle body 2 is inserted into the through-hole and can rotate relative to the through-hole. The top of the bottle body 2 is supported on the top edge of the through-hole.

[0038] Furthermore, in this embodiment, the rotating assembly 32 includes a roller 321 and a rotating motor 322. The roller 321 is movably positioned on one side of the placement portion 311 and is configured to rotate the bottle body 2 against the outer wall of the bottle body 2. The rotating motor 322 is connected to the roller 321 to drive the roller 321 to rotate. When the roller 321 moves to contact the outer wall of the bottle body 2, the rotating motor 322 drives the roller 321 to rotate, thereby rotating the bottle body 2. The simulated no-load torque value T1 is a test value obtained by the rotating motor 322 of the simulation test device when rotating the bottle body 2 and the push rod 1 is not docked with the bottle body 2. The simulated upper limit torque value T2 is a test value obtained by the rotating motor 322 of the simulation test device when rotating the bottle body 2 and the push rod 1 is docked with the bottle body 2. The actual no-load torque value T4 is a test value obtained by the rotating motor 322 of the twisting rod labeling machine when rotating the bottle body 2 and the push rod 1 is not docked with the bottle body 2.

[0039] Furthermore, in this embodiment, the pushing mechanism 4 includes a lifting frame 41 and a fixing assembly 42 provided on the lifting frame 41 for fixing the push rod 1 .

[0040] Although the present invention has been disclosed above with reference to preferred embodiments, this is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, utilize the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the scope of protection of the technical solution of the present invention.

Claims

1. A method for determining a torque setting value of a twist rod of a prefilled container twist rod labeling machine, characterized in that: The steps include: S1, obtaining a simulated no-load torque value T1 when a simulated twisting rod labeling machine rotates a prefilled container and does not assemble the prefilled container by testing with a simulation test device; S2, obtaining a simulated upper limit torque value T2 when a simulated twisting rod labeling machine is twisting and assembling a prefilled container through a simulation test device; S3, actual screwing torque value T3, satisfies T3=T2-T1; S4, obtaining an actual no-load torque value T4 when the twist rod labeling machine rotates the prefilled container and does not assemble the prefilled container; S5. The actual upper limit torque value T5 of the screw rod labeling machine when screwing and assembling the pre-filled container satisfies T5=T3+T4.

2. The method for determining the torque setting value of the twist rod of the prefilled container twist rod labeling machine according to claim 1, characterized in that: In S1 and S2, the speed of rotating the prefilled container is the same, which is set to V1. In S4, the speed of rotating the prefilled container is set to V2, satisfying V2=V1.

3. The method for determining the torque setting value of the twist rod of the prefilled container twist rod labeling machine according to claim 1, characterized in that: In S2, the simulated upper limit torque value T2 is based on the standard of screwing and assembling the prefilled container without over-tightening or under-tightening.

4. The method for determining the torque setting value of the twist rod of the prefilled container twist rod labeling machine according to claim 3, characterized in that: In S2, the simulated upper limit torque value T2 is obtained through multiple assignments and simulation test verifications.

5. The method for determining the torque setting value of the twist rod of the prefilled container twist rod labeling machine according to claim 4, characterized in that: The multiple assignments are performed in ascending order.

6. The method for determining the torque setting value of the twist rod of a prefilled container twist rod labeling machine according to any one of claims 1 to 5, characterized in that: The prefilled container is a prefilled needle assembled by threaded connection of a push rod (1) and a bottle body (2).

7. The method for determining the torque setting value of the twist rod of the prefilled container twist rod labeling machine according to claim 6, characterized in that: The simulation test device and the twist rod labeling machine both comprise a twisting mechanism (3) and a pushing mechanism (4); the twisting mechanism (3) is used to carry and rotate the bottle body (2); the pushing mechanism (4) is used to dock the push rod (1) with the bottle body (2) and push the push rod (1) into the bottle body (2); the simulated no-load torque value T1 is a test value of the twisting mechanism (3) of the simulation test device when the bottle body (2) is carried and rotated and the push rod (1) is not docked with the bottle body (2); the simulated upper limit torque value T2 is a test value of the twisting mechanism (3) of the simulation test device when the bottle body (2) is carried and rotated and the push rod (1) is docked and assembled with the bottle body (2); and the actual no-load torque value T4 is a test value of the twisting mechanism (3) of the twist rod labeling machine when the bottle body (2) is carried and rotated and the push rod (1) is not docked with the bottle body (2).

8. The method for determining the torque setting value of the twist rod of the prefilled container twist rod labeling machine according to claim 7, characterized in that: The screwing mechanism (3) comprises a support frame (31) and a rotating assembly (32) for rotating the bottle body (2); the support frame (31) is provided with a placement portion (311) for vertically placing the bottle body (2); and the pushing mechanism (4) is arranged above the placement portion (311).

9. The method for determining the torque setting value of the twist rod of the prefilled container twist rod labeling machine according to claim 8, characterized in that: The rotating assembly (32) comprises a roller (321) and a rotating motor (322); the roller (321) is movably disposed on one side of the placement portion (311) and is used to press against the outer wall of the bottle body (2) to rotate the bottle body (2); the rotating motor (322) is connected to the roller (321) to drive the roller (321) to rotate.

10. The method for determining the torque setting value of the twist rod of the prefilled container twist rod labeling machine according to claim 7, characterized in that: The pushing mechanism (4) comprises a lifting frame (41) and a fixing component (42) arranged on the lifting frame (41) and used for fixing the push rod (1).

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