Freezing point cloth cover machine for curling stone

Abstract

The utility model discloses a freezing point cloth cover machine for curling. The problems that existing dotting work is completed manually, a plurality of racing tracks are arranged on each ice rink, time and labor are wasted, and manual spraying may be uneven are solved. The device comprises a walking trolley, a driving mechanism, two connecting rod spraying mechanisms and two constant-temperature water tanks, the driving mechanism is installed on the walking trolley, the two connecting rod spraying mechanisms are symmetrically arranged on the walking trolley, one end of each connecting rod spraying mechanism is connected with the driving end of the driving mechanism, the other end of each connecting rod spraying mechanism is rotatably installed on the walking trolley, and the two connecting rod spraying mechanisms are driven by the driving mechanism to move oppositely; the two constant-temperature water tanks are arranged on the walking trolley, and each constant-temperature water tank is communicated with the spraying ends of the two connecting rod spraying mechanisms through two water pipes so as to achieve the purpose of water supply. The utility model belongs to the field of ice sports facilities.

Description

Technical Field

[0001] The utility model belongs to the field of ice sports facilities, in particular to an ice point covering machine for curling. Background Art

[0002] Curling is one of the important events of the Beijing Winter Olympics. It has very strict requirements for the venue of curling. Unlike other ice sports, curling requires an uneven ice surface, so "dotting" has become the most special part of ice making in curling, that is, water droplets must be sprayed evenly on the ice surface. When the water droplets freeze, an uneven ice surface will be formed. After each game, an ice scraper is needed to remove all the remaining ice points from the previous game, and then the ice points are sprayed again. In the "dotting" process, water with a temperature of 90℉ needs to be evenly sprayed on the ice rink for the first time as the basic freezing point, and the density must be high and the freezing point must be upright; then water with a temperature of 120℉ is evenly sprayed on the ice rink as the top freezing point; both the basic freezing point and the top freezing point need to be sprayed quickly.

[0003] The existing "dotting" work is generally done manually. Each ice rink has multiple tracks, which is time-consuming and labor-intensive, and manual spraying may result in unevenness. Summary of the invention

[0004] In order to solve the problem that the existing "dotting" work is done manually, each ice rink has multiple tracks, which is time-consuming and labor-intensive, and the manual spraying may be uneven, the utility model provides an ice dotting machine for curling.

[0005] A curling ice spreading machine comprises a trolley, a driving mechanism, two connecting rod spraying mechanisms and two constant temperature water tanks; the driving mechanism is installed on the trolley, the two connecting rod spraying mechanisms are symmetrically arranged on the trolley, and one end of each connecting rod spraying mechanism is connected to the driving end of the driving mechanism, and the other end of each connecting rod spraying mechanism is rotatably installed on the trolley, and the two connecting rod spraying mechanisms move towards each other under the drive of the driving mechanism; the two constant temperature water tanks are arranged on the trolley, and each constant temperature water tank is connected to the injection end of the two connecting rod spraying mechanisms through two water pipes respectively to achieve the purpose of water supply.

[0006] As a preferred solution: the walking trolley includes an upper platform, a lower platform arranged below the upper platform, and four walking wheels installed on the lower surface of the lower platform and at four vertex corners; the driving mechanism and two connecting rod spraying mechanisms are installed on the upper surface of the upper platform, and the two constant temperature water tanks are installed between the upper platform and the lower platform and are used to support the upper platform.

[0007] As a preferred solution: the tail end of the upper platform is rotatably connected to the constant temperature water tank; a linear drive is further provided between the upper platform and the lower platform. The linear drive has a fixed end and a telescopic drive end. The fixed end of the linear drive is installed on the lower platform, and the telescopic drive end of the linear drive abuts against the lower surface of the upper platform near the front end, so as to realize the upward or downward flipping of the upper platform around the rotational connection point at the tail end under the drive of the linear drive.

[0008] As a preferred solution: the linear drive is arranged between the two constant temperature water tanks, and a support roller is fixedly installed at the telescopic drive end of the linear drive. The axial direction of the support roller is the same as the connection direction of the two constant temperature water tanks; contact is generated between the outer wall of the support roller and the lower surface of the upper platform, and the front end of the upper platform is supported; when the upper platform is in a horizontal state, both ends of the support roller are supported on the upper surfaces of the two constant temperature water tanks.

[0009] As a preferred solution: the drive mechanism includes a support seat, a motor, a driving wheel and a driven wheel; the support seat is in an inverted "U" shape, and the support seat is fixedly installed on one side of the upper platform near the tail end, and a gear installation opening is formed between the support seat and the upper platform; the housing of the motor is fixedly installed on the upper surface of the support seat, the output shaft of the motor passes through the support seat and extends into the gear installation opening, the driving wheel is coaxially and fixedly connected to the output shaft of the motor, the driven wheel is rotatably installed in the gear installation opening and meshes with the driving wheel; the driving wheel is connected to the end of one of the link spraying mechanisms and has a driving relationship with it, and the driven wheel is connected to the end of the other link spraying mechanism 3 and has a driving relationship with it.

[0010] As a preferred solution: each link spraying mechanism includes a first link, a second link and a nozzle. One end of the first link is rotatably connected to a position near the edge of the driving wheel / driven wheel through a first pin shaft, the other end of the first link is rotatably connected to one end of the second link through a second pin shaft, the other end of the second link is fixedly connected to the tail end of the nozzle, and the connection end of the second link and the nozzle is rotatably connected to the upper platform through a third pin shaft.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] 1. The present application realizes the movement of the device through the design of the walking trolley, and the design of the drive mechanism and the two link spraying mechanisms can realize the uniform spraying of water droplets, ensuring the uniformity of the freezing point. Since the production of the freezing point needs to be completed through two processes, the first process needs to use water with a relatively low temperature to form the basic freezing point, and the second process needs to use water with a relatively high temperature to form the top freezing point. Therefore, the present application designs two constant temperature water tanks to store water at different temperatures to provide water at different temperatures for making different freezing points.

[0013] 2. In order to ensure that the basic ice point can be upright, this application reduces the size and weight of the device by changing the walking trolley, as well as the design of the linear drive and the support roller, and uses an upward spraying method to raise the landing point of the water droplets, ensuring that the water droplets are as vertical as possible when falling on the ice rink. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] For ease of explanation, the present invention is described in detail by the following specific implementations and drawings.

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the state when the two connecting rod spraying mechanisms are opened at the minimum angle;

[0017] Figure 3 It is a schematic diagram of the state when the opening angle of the two connecting rod spraying mechanisms increases;

[0018] Figure 4 It is a schematic diagram of the state when the two connecting rod spraying mechanisms are opened at the maximum angle;

[0019] Figure 5 It is a schematic diagram of the structure of the nozzle;

[0020] Figure 6 is a top view of the support seat;

[0021] Figure 7 It is a schematic diagram showing that the upper platform of the traveling trolley is in a horizontal state;

[0022] Figure 8 This is a state diagram in which the front end of the upper platform of the walking trolley is lifted up at a certain angle.

[0023] In the figure, 1-traveling trolley; 1-1-upper platform; 1-2-lower platform; 1-3-traveling wheel; 2-driving mechanism; 2-1-support seat; 2-2-motor; 2-3-driving wheel; 2-4-driven wheel; 3-connecting rod spraying mechanism; 3-1-connecting rod one; 3-2-connecting rod two; 3-3-sprinkler; 3-4-pin shaft one; 3-5-pin shaft two; 3-6-pin shaft three; 4-constant temperature water tank; 4-1-water pipe; 5-linear drive; 5-1-support roller. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is described below by specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0025] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme according to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0026] See also Figure 1 The present embodiment provides an ice point covering machine for curling, comprising a traveling trolley 1, a driving mechanism 2, two connecting rod spraying mechanisms 3 and two constant temperature water tanks 4; the driving mechanism 2 is installed on the traveling trolley 1, and the two connecting rod spraying mechanisms 3 are symmetrically arranged on the traveling trolley 1, and one end of each connecting rod spraying mechanism 3 is connected to the driving end of the driving mechanism 2, and the other end of each connecting rod spraying mechanism 3 is rotatably installed on the traveling trolley 1, and the two connecting rod spraying mechanisms 3 move toward each other under the drive of the driving mechanism 2; the two constant temperature water tanks 4 are arranged on the traveling trolley 1, and each constant temperature water tank 4 is connected to the injection end of the two connecting rod spraying mechanisms 3 through two water pipes 4-1 respectively to achieve the purpose of water supply.

[0027] In this embodiment, the movement of the device is achieved through a walking trolley 1, which can be moved by manual pulling by the ice maker or by remote control. The design of the driving mechanism 2 and the two connecting rod spraying mechanisms 3 can achieve uniform spraying of water droplets, and can ensure that the spraying range does not overlap, thereby ensuring the uniformity of the freezing point. Since the production of the freezing point needs to be completed in two steps, the first step requires the use of relatively low temperature water to form the basic freezing point, and the second step requires the use of relatively high temperature water to form the top freezing point, so this embodiment designs two constant temperature water tanks 4 to store water of different temperatures, one of which stores 90℉ water, and the other stores 120℉ water, so as to provide water of different temperatures and different freezing points. In addition, a pump body is installed on each water pipe 4-1 to achieve the spraying of water droplets.

[0028] During the specific implementation of this embodiment, first, the ice-making staff pulls the walking cart 1 backwards at a constant speed along the track of the curling venue, and when making the basic freezing point, the constant temperature water tank 4 storing 90℉ water supplies water, and at the same time, the driving mechanism 2 is started to drive the two connecting rod spraying mechanisms 3 to move in the opposite direction synchronously, so as to achieve uniform spraying of water; when the basic freezing point is condensed, when making the top freezing point, the ice-making staff again pulls the walking cart 1 backwards at a constant speed along the track of the curling venue, and at this time, the constant temperature water tank 4 storing 120℉ water supplies water, and at the same time, the driving mechanism 2 is started to drive the two connecting rod spraying mechanisms 3 to move in the opposite direction synchronously, so as to achieve uniform spraying of water again, and form the top freezing point after condensation.

[0029] Further, such as Figure 7 and Figure 8As shown, the walking trolley 1 includes an upper platform 1-1, a lower platform 1-2 arranged below the upper platform 1-1, and four walking wheels 1-3 installed on the lower surface of the lower platform 1-2 and at four vertex corners; the driving mechanism 2 and two connecting rod spraying mechanisms 3 are installed on the upper surface of the upper platform 1-1, and the two constant temperature water tanks 4 are installed between the upper platform 1-1 and the lower platform 1-2 and are used to support the upper platform 1-1.

[0030] Among them, in order to change the spraying angle of the connecting rod spraying mechanism 3, the tail end of the upper platform 1-1 in this embodiment is rotatably connected to the constant temperature water tank 4, including but not limited to the use of a pin shaft or a hinge to achieve the rotatable connection; there is no direct connection between the front end of the upper platform 1-1 and the constant temperature water tank 4, that is, the front end of the upper platform 1-1 can be separated from the upper surface of the constant temperature water tank 4; a linear drive 5 is also arranged between the upper platform 1-1 and the lower platform 1-2, and the linear drive 5 has a fixed end and a telescopic drive end. The fixed end of the linear drive 5 is installed on the lower platform 1-2, and the telescopic drive end of the linear drive 5 abuts against the lower surface of the upper platform 1-1, and is driven by the linear drive 5 to realize the upper platform 1-1 flipping upward or downward around the rotation connection point of the tail end.

[0031] In addition, the linear drive 5 includes but is not limited to a hydraulic cylinder, a pneumatic cylinder or a screw-nut pair; in order to reduce the friction between the telescopic drive end of the linear drive 5 and the lower surface of the upper platform 1-1 and reduce the load force of the upper platform 1-1 on the linear drive 5, the linear drive 5 described in this embodiment is arranged between two constant temperature water tanks 4, and a support roller 5-1 is fixedly installed at the telescopic drive end of the linear drive 5, and the axial direction of the support roller 5-1 is the same as the connecting direction of the two constant temperature water tanks 4; the outer wall of the support roller 5-1 is in contact with the lower surface of the upper platform 1-1 and has a supporting effect on the front end of the upper platform 1-1; when the upper platform 1-1 is in a horizontal state, the two ends of the support roller 5-1 are supported on the upper surfaces of the two constant temperature water tanks 4 to reduce the load of the linear drive 5 and ensure the service life of the linear drive 5.

[0032] It should be noted that the length of the support roller 5 - 1 only needs to be able to ensure support on the upper surfaces of the two constant temperature water tanks 4 , and does not need to be exactly the same as the length of the upper platform 1 - 1 .

[0033] In this embodiment, since the curling rink needs to be in a standing state when making the basic freezing point, there must be a certain distance between the dropping point of the water droplet and the ice rink surface to ensure that the water droplet is in a vertical state as much as possible when it drops on the ice rink. This distance is generally about 1m. Therefore, in this embodiment, the dropping point of the water droplet can be raised by the upward spraying method on the premise of reducing the volume and weight of the device. In the specific implementation process of this embodiment, the telescopic driving end of the linear driver 5 extends upward, and generates a driving force on the upper platform 1-1 through the support roller 5-1. The support roller 5-1 leaves the upper surfaces of the two constant temperature water tanks 4, and at the same time drives the upper platform 1-1 to turn upward around the rotational connection point at the tail end, realizing the elevation of the spraying end of the connecting rod spraying mechanism 3, and thus changing the spraying angle of the connecting rod spraying mechanism 3.

[0034] Furthermore, in order to enable the driving mechanism 2 to generate a reverse driving force on the two connecting rod spraying mechanisms 3, as Figure 1 and Figure 6 shown, the driving mechanism 2 described in this embodiment includes a support base 2-1, a motor 2-2, a driving wheel 2-3 and a driven wheel 2-4; the support base 2-1 is in an inverted "U" shape, and the support base 2-1 is fixedly installed on one side of the upper platform 1-1 near the tail end, and forms a gear installation opening with the upper platform 1-1; the housing of the motor 2-2 is fixedly installed on the upper surface of the support base 2-1, the output shaft of the motor 2-2 passes through the support base 2-1 and extends into the gear installation opening, the driving wheel 2-3 is coaxially and fixedly connected with the motor output shaft, the driven wheel 2-4 is rotatably installed in the gear installation opening, and meshes with the driving wheel 2-3; the driving wheel 2-3 is connected to the end of one of the connecting rod spraying mechanisms 3 and has a driving relationship with it, and the driven wheel 2-4 is connected to the end of the other connecting rod spraying mechanism 3 and has a driving relationship with it.

[0035] In the specific implementation process of this embodiment, the output shaft of the motor 2-2 rotates back and forth (the rotation angle each time does not exceed 90 degrees to avoid interference with the rotation of the connecting rod one), drives the driving wheel 2-3 to rotate, the driving wheel 2-3 drives the driven wheel 2-4 to rotate in the reverse direction, and at the same time drives the connecting rod spraying mechanism 3 connected to it to swing, and the driven wheel 2-4 drives the connecting rod spraying mechanism 3 connected to it to swing in the reverse direction, thereby realizing the reverse synchronous movement of the two connecting rod spraying mechanisms 3.

[0036] Furthermore, in order to achieve "dotting" of a large area of the ice rink, as Figures 2 to 5As shown, in this embodiment, each connecting rod spraying mechanism 3 includes a connecting rod 1 3-1, a connecting rod 2 3-2 and a nozzle 3-3, one end of the connecting rod 1 3-1 is rotatably connected to the driving wheel 2-3 / driven wheel 2-4 at a position close to the edge through a pin shaft 1 3-4, that is, an eccentric rotation connection, the other end of the connecting rod 1 3-1 is rotatably connected to one end of the connecting rod 2 3-2 through a pin shaft 2 3-5, the other end of the connecting rod 2 3-2 is fixedly connected to the tail end of the nozzle 3-3, and the connecting end of the connecting rod 2 3-2 and the nozzle 3-3 is rotatably connected to the upper platform 1-1 through a pin shaft 3-6.

[0037] In the specific implementation process of this embodiment, the driving wheel 2-3 / driven wheel 2-4 drives one end of the connecting rod 1 3-1 to move during the rotation process, and drives the connecting rod 1 3-1 to rotate around the pin 1 3-4, the connecting rod 1 3-1 drives the connecting rod 2 3-2 to rotate around the pin 3-6, and the connecting rod 2 3-2 drives the spray head 3-3 to rotate around the pin 3-6, so as to achieve the effect of large-area spraying of a single track and improve the spraying efficiency. It should be noted that since the two connecting rod spraying mechanisms 3 are symmetrically arranged, the points where the two connecting rod spraying mechanisms 3 are connected to the driving wheel 2-3 and the driven wheel 2-4 are also symmetrically arranged. When the driving wheel 2-3 and the driven wheel 2-4 rotate synchronously in the opposite direction, the two connecting rod spraying mechanisms 3 will be given the same size but symmetrical driving direction, so that the two connecting rod spraying mechanisms 3 move synchronously in the opposite direction, avoiding the overlap of the spraying range of the two connecting rod spraying mechanisms 3 during the swinging process, which affects the uniformity of the freezing point.

[0038] The working process of the utility model is further described below to highlight the advantages of the utility model:

[0039] Production of basic freezing point:

[0040] First, adjust the spraying angle of the nozzle 3-3. Specifically, the telescopic driving end of the linear actuator 5 extends upward and generates a driving force for the upper platform 1-1 through the support roller 5-1. The support roller 5-1 leaves the upper surface of the two constant temperature water tanks 4 and drives the upper platform 1-1 to flip upward around the rotating connection point at the tail end, thereby raising the spraying end of the connecting rod spraying mechanism 3, thereby changing the spraying angle of the nozzle 3-3. Secondly, the ice-making staff pushes the walking cart 1 to the starting position of the track, pulls the walking cart 1 backward at a constant speed along the track of the curling venue, starts the pump body of the constant temperature water tank 4 storing 90℉ water to supply water, and starts the motor 2-2 at the same time. The output shaft of the motor 2-2 rotates and drives the driving wheel 2-3 to rotate. The driving wheel 2-3 drives the driven wheel 2-4 to rotate in the opposite direction. The driving wheel 2-3 and the driven wheel 2-4 simultaneously drive one end of the connecting rod 1 3-1 connected to each other to move, and at the same time drive the connecting rod 1 3-1 to rotate around the pin shaft 1 3-4. The connecting rod 1 3-1 drives the connecting rod 2 3-2 to rotate around the pin shaft 3 3-6. The connecting rod 2 3-2 drives the nozzle 3-3 to rotate around the pin shaft 3 3-6, thereby realizing the production of the basic ice point.

[0041] Production of top freezing point:

[0042] When the basic freezing point is condensed, the spraying angle of the nozzle 3-3 is adjusted, and the ice-making personnel push the walking trolley 1 to the starting position of the track again, pull the walking trolley 1 backward at a uniform speed along the track of the curling venue, start the pump body of the constant temperature water tank 4 storing 120℉ water to supply water, and start the motor 2-2 at the same time. The rotation speed of the motor must be higher than the speed when making the basic freezing point. The output shaft of the motor 2-2 rotates repeatedly and drives the driving wheel 2-3 to rotate. The driving wheel 2-3 drives the driven wheel 2-4 to rotate in the opposite direction. The driving wheel 2-3 and the driven wheel 2-4 simultaneously drive one end of the connecting rod 1 3-1 connected to each other to move, and at the same time drive the connecting rod 1 3-1 to rotate around the pin shaft 1 3-4. The connecting rod 1 3-1 drives the connecting rod 2 3-2 to rotate around the pin shaft 3 3-6. The connecting rod 2 3-2 drives the nozzle 3-3 to rotate around the pin shaft 3-6, thereby realizing the production of the top freezing point.

[0043] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A curling machine for ice point covering, Features: The invention comprises a trolley (1), a driving mechanism (2), two connecting rod spraying mechanisms (3) and two constant temperature water tanks (4); the driving mechanism (2) is mounted on the trolley (1); the two connecting rod spraying mechanisms (3) are symmetrically arranged on the trolley (1); one end of each connecting rod spraying mechanism (3) is connected to the driving end of the driving mechanism (2); the other end of each connecting rod spraying mechanism (3) is rotatably mounted on the trolley (1); the two connecting rod spraying mechanisms (3) move towards each other under the drive of the driving mechanism (2); the two constant temperature water tanks (4) are arranged on the trolley (1); each constant temperature water tank (4) is connected to the spraying ends of the two connecting rod spraying mechanisms (3) through two water pipes (4-1) respectively, so as to achieve the purpose of water supply.

2. The ice point spreading machine for curling according to claim 1, Features: The walking trolley (1) comprises an upper platform (1-1), a lower platform (1-2) arranged below the upper platform (1-1), and four walking wheels (1-3) installed on the lower surface of the lower platform (1-2) and located at four vertex corners; the driving mechanism (2) and two connecting rod spraying mechanisms (3) are installed on the upper surface of the upper platform (1-1); the two constant temperature water tanks (4) are installed between the upper platform (1-1) and the lower platform (1-2) and are used to support the upper platform (1-1).

3. The ice point spreading machine for curling according to claim 2, Features: The tail end of the upper platform (1-1) is rotatably connected to the constant temperature water tank (4); a linear drive (5) is also provided between the upper platform (1-1) and the lower platform (1-2); the linear drive (5) has a fixed end and a telescopic drive end; the fixed end of the linear drive (5) is mounted on the lower platform (1-2); the telescopic drive end of the linear drive (5) abuts against the lower surface of the upper platform (1-1) near the front end, and the upper platform (1-1) is driven by the linear drive (5) to flip upward or downward around the rotation connection point of the tail end.

4. The ice point spreading machine for curling according to claim 3, Features: The linear drive (5) is arranged between the two constant temperature water tanks (4), and a support roller (5-1) is fixedly mounted on the telescopic drive end of the linear drive (5), and the axial direction of the support roller (5-1) is the same as the direction of the line connecting the two constant temperature water tanks (4); the outer wall of the support roller (5-1) is in contact with the lower surface of the upper platform (1-1), and has a supporting effect on the front end of the upper platform (1-1); when the upper platform (1-1) is in a horizontal state, the two ends of the support roller (5-1) are supported on the upper surfaces of the two constant temperature water tanks (4).

5. The ice point spreading machine for curling according to claim 2, Features: The described driving mechanism (2) includes a support base (2-1), a motor (2-2), a driving wheel (2-3), and a driven wheel (2-4); the support base (2-1) is in an inverted "U" shape, and the support base (2-1) is fixedly installed on one side of the upper platform (1-1) near the tail end, and a gear installation opening is formed between the support base (2-1) and the upper platform (1-1); the housing of the motor (2-2) is fixedly installed on the upper surface of the support base (2-1), the output shaft of the motor (2-2) passes through the support base (2-1) and extends into the gear installation opening, the driving wheel (2-3) is coaxially and fixedly connected to the motor output shaft, the driven wheel (2-4) is rotatably installed in the gear installation opening and meshes with the driving wheel (2-3); the driving wheel (2-3) is connected to the end of one of the link spraying mechanisms (3) and has a driving relationship with it, and the driven wheel (2-4) is connected to the end of the other link spraying mechanism (3) and has a driving relationship with it.

6. The ice-curling ice-point cloth surface machine according to claim 5, characterized in that: Each link spraying mechanism (3) includes a first link (3-1), a second link (3-2), and a nozzle (3-3). One end of the first link (3-1) is rotatably connected to a position near the edge of the driving wheel (2-3) / driven wheel (2-4) through a first pin (3-4), the other end of the first link (3-1) is rotatably connected to one end of the second link (3-2) through a second pin (3-5), the other end of the second link (3-2) is fixedly connected to the tail end of the nozzle (3-3), and the connection end of the second link (3-2) and the nozzle (3-3) is rotatably connected to the upper platform (1-1) through a third pin (3-6).

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