Durable submersible mixer

Abstract

The utility model relates to the technical field of stirrers, and discloses a durable submersible stirrer which comprises a second fixing box, the top end of the second fixing box is fixedly connected to the bottom end of a shell, a second sliding plate is slidably connected into the second fixing box, and three first transmission rods are rotatably connected to the bottom end of the second sliding plate. The bottom ends of the three transmission rods I are rotationally connected with rotating shafts; furthermore, the adjusting mechanism is used for adjusting the inclination angle of the stirring blade so as to adjust the flow speed of the liquid, the driving mechanism is used for providing power for the adjusting mechanism, and the buffering mechanism is used for buffering kinetic energy when the stirring blade impacts an object. According to the stirrer, the second sliding plate is further driven to slide in the second fixing box, the second sliding plate pushes the first transmission rod to rotate, the rotating shaft drives the buffering mechanism and the stirring blades to change the angle, the liquid flow speed can be flexibly adjusted, the stirrer can rapidly adapt to different scenes, and the using effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to agitator technical field especially relates to a durable submersible agitator. BACKGROUND

[0002] With the rapid development of industrialization and urbanization, the sewage discharge amount is increasing, and sewage treatment becomes an important task in the environmental protection field. In the sewage treatment process, various substances in the sewage need to be fully mixed to make the microorganisms fully contact with the pollutants, so as to improve the treatment effect. For example, in the activated sludge method for treating sewage, the submersible agitator can uniformly mix the activated sludge and the sewage to provide a good living environment for the microorganisms and promote the decomposition and transformation of the pollutants.

[0003] Through retrieval, China patent number CN219050936U discloses a submersible agitator, which belongs to the technical field of sewage treatment equipment and comprises an agitator main body, an agitator motor and a flow guide cover. The flow guide cover is characterized in that a through hole is formed in the flared portion of the flow guide cover, an adjusting shaft is fixedly inserted into the adjusting shaft seat of the flow guide cover, and the adjusting shaft is connected to the flow guide cover frame by sliding insertion. The beneficial effects of the utility model are as follows: the through hole is formed in the flared portion of the flow guide cover, which can absorb liquid through the through hole and mix with the longitudinally propelled liquid during high-speed rotation of the impeller, thereby avoiding the rupture of the impeller caused by the impact force of hard objects in the sewage. The flow guide cover also has the effect of strengthening the rotation and mixing of the liquid. Through self-adaptive adjustment of the flow guide cover, the relative position of the impeller and the through hole is reduced, which is more conducive to the mixing of the liquid absorbed through the through hole and the longitudinally propelled liquid.

[0004] The above-mentioned patent mentions in the specification that "the through hole is formed in the flared portion of the flow guide cover, which can absorb liquid through the through hole and mix with the longitudinally propelled liquid during high-speed rotation of the impeller. The flow guide cover not only retains the characteristics of vortex flow mixing during high-speed rotation of the agitator, but also avoids the rupture of the impeller caused by the impact force of hard objects in the sewage. The flow guide cover also has the effect of strengthening the rotation and mixing of the liquid." However, the angle of the stirring blade of the agitator is fixed, and in the face of different working conditions (such as different liquid viscosities, different stirring depths and different flow requirements), the stirring blade with a fixed angle cannot fully exert its best stirring effect, which limits the mixing efficiency and makes it difficult to quickly and accurately adapt to complex working scenarios, thereby reducing the overall working efficiency and mixing quality. Therefore, a durable submersible agitator is proposed to solve the above-mentioned problems. UTILITY MODEL CONTENTS

[0005] In order to make up for the above shortcomings, the utility model provides a durable submersible mixer, aims at improving the problem that the fixed angle stirring blade in the prior art cannot fully play its best stirring effect, leading to limited stirring efficiency.

[0006] In order to achieve the above object, the utility model adopts the following technical scheme:

[0007] A durable submersible mixer, including the casing, the bottom of casing is provided with adjusting mechanism, the outside fixed coupling of casing is provided with protection shell, the outside of adjusting mechanism is provided with buffer mechanism,

[0008] The adjusting mechanism includes fixed box two, the top of fixed box two is fixedly connected in the bottom of casing, the inside of fixed box two is slidably connected with sliding plate two, the bottom of sliding plate two is rotatably connected with three transmission rods one, the bottom of three transmission rods one is rotatably connected with rotating shaft, the outside of rotating shaft is provided with drive assembly,

[0009] Further, the adjusting mechanism is used for adjusting the inclination angle of the stirring blade to adjust the liquid flow rate, the buffer mechanism is used for buffering kinetic energy when the stirring blade collides with the object, avoiding excessive impact force to damage the stirring blade, thereby ensuring the stirring efficiency of the whole device, the fixed box two is used for protecting the internal components, the sliding of the sliding plate two drives the transmission rod one to rotate, so that the rotating shaft rotates in the fixed box two.

[0010] As a further description of the above technical scheme:

[0011] The drive assembly includes a hydraulic cylinder, the outside of the hydraulic cylinder is fixedly connected in the inside of the fixed box two, the drive end of the hydraulic cylinder is fixedly connected with a sliding block, the front end of the sliding block is rotatably connected with a transmission rod two, the bottom of the transmission rod two is rotatably connected with the top of the sliding plate two.

[0012] Further, the drive assembly is used for providing power for the adjusting mechanism, the hydraulic cylinder is used for driving the sliding block to slide in the fixed box two, so that the transmission rod two transmits kinetic energy to the sliding plate two, finally making the sliding plate two slide in the fixed box two, so as to realize the rotation of the rotating shaft.

[0013] As a further description of the above technical scheme:

[0014] The inside of the fixed box two is provided with a sliding groove, and the outside of the sliding block is slidably connected in the inside of the sliding groove.

[0015] Further, the sliding groove limits the sliding direction of the sliding block, thereby ensuring the stability of the whole sliding operation.

[0016] As a further description of the above technical scheme:

[0017] The buffer mechanism includes three fixed boxes, with the adjacent sides of the three fixed boxes fixedly connected to the distant sides of the three rotating shafts respectively. Two fixed blocks are slidably connected inside each fixed box. A connecting column is fixedly connected to the adjacent side of the two fixed blocks, and a telescopic column is fixedly connected to the distant side of the two fixed blocks. A spring is sleeved on the outside of the telescopic column, and a sealing component is provided on the outside of the fixed box.

[0018] Furthermore, the fixed box is fixed to the outside of the rotating shaft, so that it rotates together with the rotating shaft. When the connecting column receives kinetic energy, it will slide inside the fixed box, so that the fixed block will slide together inside the fixed box. The spring cancels and weakens the kinetic energy, thereby achieving a buffering effect. The sealing component is used to ensure the sealing effect when the stirring blade is impacted.

[0019] As a further description of the above technical solution:

[0020] The two fixing blocks are externally slidably connected to the inside of the fixing box one, and the end of the telescopic column away from the fixing blocks is fixedly connected to the inside of the fixing box one;

[0021] Furthermore, the compression and relaxation of the spring are achieved by the sliding of the fixed block. The telescopic column is used to restrict the sliding direction of the fixed block, while guiding and protecting the spring to avoid damage.

[0022] As a further description of the above technical solution:

[0023] The front end of the spring is fixedly connected to the inside of the fixed box, the other end of the spring is fixedly connected to the front end of the fixed block, and a stirring blade is fixedly connected to the outside of the connecting column.

[0024] Furthermore, the two ends of the spring are fixed at designated positions, which allows for buffering and pushing of the fixed block, and the stirring blades are used directly to stir the water flow.

[0025] As a further description of the above technical solution:

[0026] The sealing assembly includes a fixing plate, which is externally fixedly connected to the front end of the fixing box, and a sliding plate is slidably connected inside the fixing plate. The connecting post is externally fixedly connected to the inside of the sliding plate.

[0027] Furthermore, the sliding plate will slide inside the fixed plate as the connecting column slides, thereby preventing silt and impurities from affecting the device during the buffering process.

[0028] As a further description of the above technical solution:

[0029] The three rotating shafts are externally rotatably connected to the inside of the fixed box 2, and a fixed handle is fixedly connected to the outside of the housing.

[0030] Furthermore, the protective bottom shell protects the entire mixing blade from damage caused by impacts from large objects, and the fixed handle facilitates control and transportation of the entire mixer.

[0031] This utility model has the following beneficial effects:

[0032] 1. In this utility model, if the liquid flow rate is not suitable during use, the hydraulic cylinder can be activated. The hydraulic cylinder drives the slider to slide in the groove. The slider pushes the transmission rod two to rotate, which in turn drives the sliding plate two to slide in the fixed box two. The sliding plate two pushes the transmission rod one to rotate, so that the rotating shaft drives the buffer mechanism and the stirring blade to change the angle. By changing the angle of the stirring blade, the liquid flow rate can be flexibly adjusted, allowing the stirrer to quickly adapt to different scenarios and improve the use effect.

[0033] 2. In this utility model, when the submersible mixer is running, the motor inside the shell drives the fixed box two to rotate, which in turn drives the stirring blades to stir the water flow, promoting liquid mixing and flow. The protective shell provides physical protection for the stirring blades to avoid impact from large objects. When a small object impacts the stirring blades, the connecting column drives the fixed block to slide inside the fixed box one. The spring buffers the kinetic energy of the fixed block, reducing the risk of damage to the stirring blades. At the same time, when the fixed block and the connecting column move, the sliding plate one slides inside the fixed plate to ensure sealing, prevent silt and impurities from entering, maintain the stable operation of the mixer, and improve the service life of the mixer. Attached Figure Description

[0034] Figure 1 This is a three-dimensional schematic diagram of a durable submersible mixer proposed in this utility model;

[0035] Figure 2 This is a structural schematic diagram of the fixing box of a durable submersible mixer proposed in this utility model;

[0036] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0037] Figure 4 for Figure 2 Enlarged view of point B in the middle.

[0038] Legend:

[0039] 1. Shell; 2. Buffer mechanism; 201. Stirring blade; 202. Fixing box one; 203. Connecting column; 204. Fixing block; 205. Telescopic column; 206. Spring; 3. Sealing mechanism; 301. Sliding plate one; 302. Fixing plate; 4. Adjustment mechanism; 401. Fixing box two; 402. Sliding plate two; 403. Transmission rod one; 404. Rotating shaft; 5. Drive mechanism; 501. Hydraulic cylinder; 502. Slider; 503. Transmission rod two; 504. Slide groove; 6. Protective shell; 7. Fixing handle. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] Reference Figures 1 to 3 This utility model provides an embodiment of a durable submersible mixer, comprising a housing 1. The robust and durable design of the housing 1 provides stable support for various external mechanisms, ensuring normal operation of the device even in complex working environments. An adjustment mechanism 4 is provided at the bottom of the housing 1. The adjustment mechanism 4 allows the device to flexibly adjust the stirring angle according to actual working needs, greatly enhancing the adaptability and practicality of the device and better meeting the stirring requirements under different working conditions. A drive assembly is provided inside the adjustment mechanism 4, providing a powerful and stable power source to ensure accurate and efficient adjustment, guaranteeing the device can respond promptly to changes in external conditions. A buffer mechanism 2 is provided outside the adjustment mechanism 4, playing a crucial buffering role during device operation, effectively reducing the impact of external shocks on the device. A sealing assembly is provided inside the buffer mechanism 2, preventing external liquids and impurities from entering the buffer mechanism 2, avoiding interference with its normal operation, ensuring stable performance of the buffer mechanism 2, and thus improving the reliability of the entire device.

[0042] Specifically, the adjustment mechanism 4 is used to change the tilt angle of the stirring blade 201, thereby improving the stirring ability when the liquid flow rate is insufficient. The drive component is used to make the adjustment mechanism 4 move to realize the rotation of the stirring blade 201. The buffer mechanism 2 is used to weaken the impact force, thereby reducing the probability of damage to the stirring blade 201.

[0043] The adjustment mechanism 4 includes a fixed box 401, the top of which is fixedly connected to the bottom of the housing 1. This fixed connection ensures the stability of the connection between the fixed box 401 and the housing 1, allowing the adjustment mechanism 4 to be firmly installed on the housing 1. A sliding plate 402 is slidably connected inside the fixed box 401. The sliding plate 402 can accurately convert the power transmitted by the drive component into actual sliding. Three transmission rods 403 are rotatably connected to the bottom of the sliding plate 402. The bottom of each of the three transmission rods 403 is rotatably connected to a rotating shaft 404. The three transmission rods 403 can effectively transmit the movement of the sliding plate 402 to the rotating shaft 404, ensuring the smoothness of the adjustment process. As a key transmission component of the adjustment mechanism 4, the rotation of the rotating shaft 404 can drive the buffer mechanism 2 and the stirring blade 201 to adjust their angles, thereby achieving precise adjustment of the liquid flow rate.

[0044] Specifically, when the sliding plate 402 slides, it pushes the transmission rod 403 to rotate, causing the rotating shaft 404 to rotate inside the fixed box 401, thereby changing the angle of the stirring blade 201 and achieving the desired angle.

[0045] The drive assembly includes a hydraulic cylinder 40401, which is externally fixedly connected to the inside of the fixed box 401. A slider 40402 is fixedly connected to the drive end of the hydraulic cylinder 40401. A transmission rod 40403 is rotatably connected to the front end of the slider 40402. The slider 40402 can move linearly under the drive of the hydraulic cylinder 40401, effectively transmitting the driving force of the hydraulic cylinder 40401 to the transmission rod 40403, thus further transmitting power. The bottom end of the transmission rod 40403 is rotatably connected to the top end of the sliding plate 402. The rotatable connection of the transmission rod 40403 allows it to convert the linear motion of the slider 40402 into rotation, thereby pushing the sliding plate 402 to slide within the fixed box 401, completing the transmission of the adjustment action. This connection method ensures that the transmission rod 40403 can accurately transmit power to the sliding plate 402, enabling the adjustment mechanism 4 to make precise adjustments according to the design requirements.

[0046] Specifically, the hydraulic cylinder 40401 drives the slider 40402 to slide, which enables the transmission rod 40403 to rotate and transmit kinetic energy to the sliding plate 402, causing the sliding plate 402 to slide inside the fixed box 401, thus enabling the entire adjustment mechanism 4 to operate.

[0047] The interior of the fixed box 401 has a sliding groove 40404, and the slider 40402 is externally slidably connected to the interior of the sliding groove 40404. The sliding groove 40404 provides precise guidance for the sliding of the slider 40402, ensuring that the slider 40402 can slide smoothly along the predetermined trajectory, thus improving the accuracy of the adjustment process. The three rotating shafts 404 are externally rotatably connected to the interior of the fixed box 401. This rotatable connection allows the rotating shafts 404 to rotate flexibly within the fixed box 401, while being effectively constrained by the fixed box 401, ensuring the stability and reliability of the adjustment mechanism 4. The bottom of the housing 1 is fixedly connected to a protective shell 3, which can effectively block large objects from directly impacting the stirring blade 201, providing all-round protection for the stirring blade 201 and reducing the risk of damage. The exterior of the housing 1 is fixedly connected to a fixed handle 5, which facilitates the operator's handling and installation of the device, making it easier to move the device to different positions.

[0048] Specifically, the chute 40404 guides and restricts the slider 40402 to ensure the normal operation of the drive assembly, and the protective shell 3 effectively blocks large objects from directly impacting the stirring blade 201, thus improving the safety of the stirring blade 201.

[0049] Reference Figure 1 , Figure 2 and Figure 4 The buffer mechanism 2 includes three fixed boxes 202. The adjacent sides of the three fixed boxes 202 are respectively fixedly connected to the distant sides of three rotating shafts 404. This connection method ensures that the rotation of the rotating shafts 404 can be accurately transmitted to the buffer mechanism 2, thereby driving the rotation of the stirring blade 201 and realizing the adjustment of the angle of the stirring blade 201. Two fixed blocks 204 are slidably connected inside the fixed boxes 202. The sliding of the fixed blocks 204 within the fixed boxes 202 is a crucial step in realizing the buffer function of the buffer mechanism 2. When the stirring blade 201 is impacted, the fixed blocks 204 can... The two fixed blocks 204 are able to slide within the fixed box 202, thereby absorbing and buffering the impact energy. A connecting column 203 is fixedly connected to the adjacent side of the two fixed blocks 204. The connecting column 203 is used to connect the two fixed blocks 204 and is also fixedly connected to the stirring blade 201, so as to transfer the force on the stirring blade 201 to the fixed block 204 and realize the buffering function. A telescopic column 205 is fixedly connected to the distant side of the two fixed blocks 204. The telescopic column 205 can extend and retract when the fixed block 204 is subjected to force, further enhancing the buffering effect of the buffer mechanism 2 and effectively absorbing and dispersing the impact energy.

[0050] Specifically, the rotating shaft 404 drives the fixed box 202 to rotate, causing the stirring blade 201 to rotate. The telescopic column 205 is used to restrict and guide the sliding of the fixed block 204, ensuring the stability of the sliding of the fixed block 204, thereby ensuring the stable operation of the entire buffering process.

[0051] A spring 206 is sleeved on the outside of the telescopic column 205. The spring 206 is the core component of the buffer mechanism 2. When the fixed block 204 slides under impact force, the spring 206 is compressed, thereby converting the impact kinetic energy into elastic potential energy, playing a buffering role, reducing the impact force on the stirring blade 201, and reducing the probability of its damage. The two fixed blocks 204 are externally slidably connected to the inside of the fixed box 202. This connection method allows the fixed blocks 204 to slide freely within the fixed box 202, while being restricted by the fixed box 202, ensuring buffering. To ensure the stability and reliability of mechanism 2, the end of the telescopic column 205 furthest from the fixed block 204 is fixedly connected to the inside of the fixed box 202. This connection method ensures that the telescopic column 205 can guarantee that the spring 206 can work normally and achieve the buffering function. The front end of the spring 206 is fixedly connected to the inside of the fixed box 202, and the other end of the spring 206 is fixedly connected to the front end of the fixed block 204. This connection method allows the spring 206 to effectively play a buffering role when the fixed block 204 slides, converting the impact energy into elastic potential energy and protecting the stirring blade 201.

[0052] Specifically, spring 206 is the main component of buffer mechanism 2. Through the elastic deformation of spring 206, when the position of fixed block 204 changes, it buffers and pulls it to achieve the weakening and cancellation of force.

[0053] A stirring blade 201 is fixedly connected to the external of the connecting column 203. The stirring blade 201 is a key component for stirring, and its rotation stirs the liquid. The connection between the stirring blade 201 and the buffer mechanism 2 ensures effective protection against impacts. The sealing assembly includes a fixing plate 20602, which is externally fixedly connected to the front end of the fixed box 202. The fixing plate 20602 provides an installation base for the sliding plate 20601 and also provides a certain degree of protection, preventing external impurities from entering the fixed box 202 and affecting the normal operation of the buffer mechanism 2. The fixed plate 20602 is internally slidably connected to a sliding plate 20601. The sliding plate 20601 slides within the fixed plate 20602 and moves with the fixed block 204 and the connecting column 203, thereby ensuring the sealing effect of the sealing assembly and preventing silt and impurities from entering the device and affecting the operation of the submersible mixer. The connecting column 203 is externally fixedly connected to the inside of the sliding plate 20601. This connection method allows the sliding plate 20601 to move synchronously with the connecting column 203, ensuring that the sealing assembly can function effectively and guaranteeing the sealing performance and stability of the device.

[0054] Specifically, the stirring blade 201 is used to directly interact with the water flow. By adjusting the angle of the stirring blade 201, the stirring effect can be changed. The sealing component can ensure the sealing effect when the buffer mechanism 2 is buffering, and ensure the normal operation of the buffer mechanism 2.

[0055] Working principle: When the submersible mixer is in use, the motor built into the housing 1 drives the fixed box 2 401 to rotate, thereby causing the stirring blade 201 to stir the water flow. During use, the protective shell 3 protects the stirring blade 201 to prevent large objects from damaging it. When small objects collide with the stirring blade 201, the connecting column 203 drives the fixed block 204 to slide inside the fixed box 202. When the fixed block 204 slides, the spring 206 buffers it, thereby buffering the kinetic energy and reducing the probability of damage to the stirring blade 201, ensuring the normal use of the submersible mixer. When the fixed block 204 and the connecting column 203 move, the sliding plate 20601 slides together inside the fixed plate 20602, thereby ensuring a sealing effect and preventing silt and impurities from affecting the operation of the submersible mixer.

[0056] When the submersible mixer is in use, if the liquid flow rate is insufficient or too fast, the hydraulic cylinder 40401 can be activated. The hydraulic cylinder 40401 will drive the slider 40402 to slide inside the slide groove 40404. When the slider 40402 slides, it will push the transmission rod 40403 to rotate, thereby causing the sliding plate 402 to slide inside the fixed box 401. When the sliding plate 402 slides, it will push the transmission rod 403 to rotate, which will eventually drive the rotating shaft 404 to rotate inside the fixed box 401. This will change the angle of the entire buffer mechanism 2, thereby changing the angle of the stirring blade 201 and adjusting the liquid flow rate. This allows it to quickly adapt to different scenarios and ensure the effectiveness of the submersible mixer.

[0057] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A durable submersible mixer, comprising a housing (1), characterized in that: An adjustment mechanism (4) is provided at the bottom of the housing (1), a protective shell (3) is fixedly connected to the outside of the housing (1), and a buffer mechanism (2) is provided on the outside of the adjustment mechanism (4). The adjustment mechanism (4) includes a fixed box two (401), the top of the fixed box two (401) is fixedly connected to the bottom of the housing (1), the inside of the fixed box two (401) is slidably connected to a sliding plate two (402), the bottom of the sliding plate two (402) is rotatably connected to three transmission rods one (403), the bottom of the three transmission rods one (403) is rotatably connected to a rotating shaft (404), and a drive assembly is provided on the outside of the rotating shaft (404).

2. The durable submersible mixer according to claim 1, characterized in that: The drive assembly includes a hydraulic cylinder (40401), which is externally fixedly connected to the inside of the fixed box two (401). The drive end of the hydraulic cylinder (40401) is fixedly connected to a slider (40402). The front end of the slider (40402) is rotatably connected to a transmission rod two (40403), and the bottom end of the transmission rod two (40403) is rotatably connected to the top end of the sliding plate two (402).

3. A durable submersible mixer according to claim 2, characterized in that: The fixed box 2 (401) has a sliding groove (40404) inside, and the slider (40402) is externally slidably connected to the inside of the sliding groove (40404).

4. A durable submersible mixer according to claim 1, characterized in that: The buffer mechanism (2) includes three fixed boxes (202). The three fixed boxes (202) are fixedly connected to the opposite sides of the three rotating shafts (404) respectively. The fixed boxes (202) are slidably connected to two fixed blocks (204). The two fixed blocks (204) are fixedly connected to the opposite sides of the two fixed blocks (204) with connecting columns (203). The two fixed blocks (204) are fixedly connected to the opposite sides with telescopic columns (205). The telescopic columns (205) are fitted with springs (206). The fixed boxes (202) are provided with sealing components on the outside.

5. A durable submersible mixer according to claim 4, characterized in that: The two fixing blocks (204) are externally slidably connected to the inside of the fixing box (202), and the end of the telescopic column (205) away from the fixing block (204) is fixedly connected to the inside of the fixing box (202).

6. A durable submersible mixer according to claim 4, characterized in that: The front end of the spring (206) is fixedly connected to the inside of the fixed box (202), the other end of the spring (206) is fixedly connected to the front end of the fixed block (204), and the stirring blade (201) is fixedly connected to the outside of the connecting column (203).

7. A durable submersible mixer according to claim 4, characterized in that: The sealing assembly includes a fixing plate (20602), which is externally fixedly connected to the front end of the fixing box (202). A sliding plate (20601) is slidably connected inside the fixing plate (20602), and the connecting column (203) is externally fixedly connected to the inside of the sliding plate (20601).

8. A durable submersible mixer according to claim 1, characterized in that: The three rotating shafts (404) are externally rotatably connected to the inside of the fixed box 2 (401), and the housing (1) is externally fixedly connected to a fixed handle (5).

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