Air treatment device

Abstract

The utility model provides an air treatment device, and relates to the technical field of air treatment. The air treatment device can comprise a shell, at least one air guide mechanism and at least one driving mechanism. The air guide mechanism is arranged at the air outlet duct and swings in a controlled manner; each air guide mechanism is further provided with a bottom plate and at least one air guide blade; and the at least one driving mechanism is arranged at the corresponding air guide mechanism, and each driving mechanism is connected with the bottom plate of the air guide mechanism and the at least one air guide blade so as to controllably drive the corresponding bottom plate and the corresponding air guide blade to rotate. The bottom plate and the air guide blades can rotate, so that the air guide angle of the air guide mechanism can be increased, the air blowing coverage area is increased, and the user experience is improved. Due to the fact that the bottom plate and the air guide blades of the same air guide mechanism are driven by the same driving mechanism, separate driving of the bottom plate and the driving mechanism of the air guide blades is avoided, and the number and occupied space of the driving mechanisms of the whole air treatment device are reduced.

Description

Technical Field

[0001] This utility model relates to the field of air treatment technology, and in particular to an air treatment device. Background Technology

[0002] Traditional air conditioning systems adjust the airflow angle by adjusting the deflection angle of the air guide vane or by pushing the entire air guide vane mechanism outward. Due to the limitations of the air conditioning duct structure, the deflection angle of the air guide vane and the rotation angle of the entire air guide vane structure both have a maximum value, thus limiting the maximum airflow angle. Current solutions address this issue by first pushing the entire air guide vane outward through a transmission mechanism, and then adjusting the rotation angle of the air guide vane using a motor. However, this increases the number of motors and moving parts, and also occupies additional structural space. Utility Model Content

[0003] One objective of the first aspect of this utility model is to provide an air handling device that solves the technical problem of limited air outlet angle in the prior art.

[0004] Another objective of the first aspect of this utility model is to solve the problem that the drive mechanism for driving the overall and partial movement of the air guide plate occupies a large space.

[0005] Specifically, this utility model provides an air handling device, comprising:

[0006] The housing includes an air outlet duct;

[0007] At least one air guide mechanism is disposed at the air outlet duct and is controlled to oscillate at the air outlet duct; each of the air guide mechanisms is further provided with a base plate and at least one air guide blade rotatably connected to the base plate;

[0008] At least one drive mechanism is provided at the corresponding air guide mechanism, and each drive mechanism is connected to the base plate of the air guide mechanism and at least one air guide blade on the base plate to controllably drive the corresponding base plate and the air guide blade to rotate.

[0009] Optionally, each of the drive mechanisms includes:

[0010] A drive motor is connected to the controller to receive control commands from the controller and move according to the control commands; the drive motor includes an output shaft;

[0011] The drive assembly has one side connected to the output shaft of the drive motor and the other side connected to both the base plate and the air guide blades, so as to drive the base plate and / or the air guide blades to rotate under the drive of the drive motor.

[0012] Optionally, the drive assembly includes a first gear, which is connected to one of the air guide vanes and is coaxially linked with the air guide vane; the first gear rotates under the drive of the drive motor, thereby driving the air guide vane connected to the first gear to rotate.

[0013] Optionally, the first gear may also include a protrusion;

[0014] The drive assembly further includes a second gear rotatably connected to the housing; the second gear includes at least one first groove; when the first gear rotates, the second gear rotates when the protrusion enters the first groove, and the second gear remains stationary when the protrusion exits the first groove.

[0015] Optionally, each of the drive mechanisms further includes a third gear, which is coaxially arranged with the first gear and rotates with the first gear; the second gear has at least two grooves, which are located on both sides of the first groove; and the grooves contact the outer periphery of the third gear when the first groove separates from the protrusion.

[0016] Optionally, the third gear includes a second groove for avoiding the second gear when the protrusion enters the first groove.

[0017] Optionally, each of the drive mechanisms further includes a fourth gear, which is coaxially arranged with the second gear and rotates following the second gear.

[0018] Optionally, each of the drive mechanisms further includes a fifth gear, which is coaxially arranged with the first gear; the fifth gear meshes with the fourth gear to rotate under the drive of the fourth gear; the fifth gear is connected to the base plate to drive the base plate to rotate when the fifth gear rotates.

[0019] Optionally, the number of the air guide vanes at each base plate is multiple;

[0020] The multiple air guide vanes are linked together by a connecting rod so that when one of the air guide vanes is rotated in a controlled manner, the other air guide vanes rotate synchronously.

[0021] Optionally, a radially extending connecting arm is provided at the pivot of each of the air guide blades, and the connecting arms at multiple air guide blades have the same length. One end of the connecting arm is rotatably connected to the corresponding air guide blade, and the other end is connected to the connecting rod.

[0022] The air handling unit of this solution may include a housing, at least one air guiding mechanism, and at least one drive mechanism. The drive mechanism drives the base plate and air guide blades on the air guiding mechanism to rotate, thereby increasing the air guiding angle of the air guiding mechanism, improving the air blowing coverage area of ​​the air handling unit, resulting in better temperature uniformity in the room, enhancing comfort in different parts of the room, and improving the user experience. Furthermore, since the base plate and air guide blades of the same air guiding mechanism are driven by the same drive mechanism, the problem of a large number of drive mechanisms and large space occupation caused by separate drive mechanisms for the base plate and air guide blades is avoided, thus reducing the number of drive mechanisms and the space occupied by the entire air handling unit.

[0023] The above and other objects, advantages and features of this utility model will become more apparent to those skilled in the art from the following detailed description of specific embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0024] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0025] Figure 1 This is a schematic structural diagram of an air handling device according to a specific embodiment of the present invention;

[0026] Figure 2 This is a schematic structural diagram of the air guide mechanism after the base plate and air guide blades are rotated according to a specific embodiment of the present utility model;

[0027] Figure 3 This is a schematic structural diagram of the air guide vanes of the air guide mechanism after rotation according to a specific embodiment of the present utility model;

[0028] Figure 4 This is a side view of a drive mechanism according to a specific embodiment of the present invention;

[0029] Figure 5 This is a top view of a portion of the structure of a drive mechanism according to a specific embodiment of the present invention;

[0030] Figure 6 This is a schematic flowchart of a method for controlling the air outlet angle of an air handling device according to a specific embodiment of the present invention;

[0031] Figure 7 (a) is a top view of the drive mechanism when the first gear is in the initial position;

[0032] Figure 7(b) is a top view of the drive mechanism when the first gear rotates counterclockwise until the protrusion is fully inserted into the bottom of the first groove;

[0033] Figure 7 (c) is a top view of the drive mechanism when the first gear rotates counterclockwise until the protrusion just leaves the first groove;

[0034] Figure 7 (d) is a top view of the drive mechanism when the first gear rotates counterclockwise until the protrusion is completely disengaged from the first groove.

[0035] Figure 8 (a)-8(d) are according to Figure 7 (a)-7(d) Schematic structural diagrams of the base plate and guide vanes rotating at different angles corresponding to the state of the drive mechanism;

[0036] Figure 9 (a)-9(d) are top views of the drive mechanism in different states when the first gear rotates clockwise;

[0037] Figure 10 (a)-10(d) is according to Figure 9 (a)-9(d) are schematic structural diagrams of the base plate and guide vanes rotating at different angles, corresponding to the states of the drive mechanism.

[0038] Explanation of reference numerals in the attached figures:

[0039] Air handling unit - 100; Housing - 110; Air outlet duct - 111; Air guide mechanism - 120; Base plate - 121; Air guide blades - 122; Drive mechanism - 130; Drive motor - 131; Drive assembly - 132; First gear - 1321; Protrusion - 1322; Second gear - 1323; First groove - 1324; Third gear - 1325; Groove - 1326; Second groove - 1327; Fourth gear - 1328; Fifth gear - 1329. Detailed Implementation

[0040] In the description of this embodiment, it should be understood that the terms "length", "width", "height", "up", "down", "left", "right", "vertical", "horizontal", "bottom", "inner", "outer", "front", "back", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0041] As a specific embodiment of this utility model, such as Figures 1-5As shown, this embodiment provides an air handling device 100, which may include a housing 110, at least one air guiding mechanism 120, and at least one drive mechanism 130. The housing 110 may include an air outlet duct 111. At least one air guiding mechanism 120 is disposed at the air outlet duct 111 and is controllably oscillating at the air outlet duct 111. Each air guiding mechanism 120 is further provided with a base plate 121 and at least one air guiding blade 122 rotatably connected to the base plate 121. At least one drive mechanism 130 is disposed at the corresponding air guiding mechanism 120, and each drive mechanism 130 is connected to the base plate 121 of the air guiding mechanism 120 and at least one air guiding blade 122 on the base plate 121 to controllably drive the corresponding base plate 121 and air guiding blade 122 to rotate.

[0042] Specifically, the air handling device 100 of this embodiment may include a housing 110, at least one air guiding mechanism 120, and at least one drive mechanism 130. The drive mechanism 130 drives the base plate 121 and air guide blades 122 on the air guiding mechanism 120 to rotate, thereby increasing the air guiding angle of the air guiding mechanism 120, increasing the air blowing coverage area of ​​the air handling device 100, resulting in better temperature uniformity in the room, improving comfort in different parts of the room, and enhancing the user experience. In addition, since the base plate 121 and air guide blades 122 of the same air guiding mechanism 120 are driven by the same drive mechanism 130, the problem of a large number of drive mechanisms 130 and large space occupation caused by separate drive mechanisms 130 for the base plate 121 and air guide blades 122 is avoided, thereby reducing the number of drive mechanisms 130 and the space occupied by the entire air handling device 100.

[0043] Specifically, in this embodiment, the number of air guiding mechanisms 120 can be one or more, and each air guiding mechanism 120 can be provided with at least one air guiding blade 122. Preferably, each air guiding mechanism 120 can be provided with multiple air guiding blades 122. Specifically, each air guiding mechanism 120 can drive the base plate 121 and multiple air guiding blades 122 to rotate. Preferably, in this embodiment, there are two air guiding mechanisms 120. The number of driving mechanisms 130 can also be two, respectively provided at the corresponding air guiding mechanism 120.

[0044] As a specific embodiment of this utility model, such as Figure 4 and Figure 5 As shown, each drive mechanism 130 in this embodiment may include a drive motor 131 and a drive assembly 132. The drive motor 131 moves in a controlled manner. The drive motor 131 may include an output shaft. One side of the drive assembly 132 is connected to the output shaft of the drive motor 131, and the other side is connected to both the base plate 121 and the guide vane 122 to drive the base plate 121 and / or the guide vane 122 to rotate under the drive of the drive motor 131.

[0045] Specifically, in this embodiment, the same drive motor 131 and drive assembly 132 can drive the base plate 121 and the guide vane 122 to move, thereby reducing the number of motors used and the space occupied, reducing the volume occupied by the air handling device 100, and facilitating the miniaturization of the device.

[0046] As a specific embodiment of this utility model, each drive component 132 may include a first gear 1321, which is connected to one of the guide vanes 122 and is coaxially linked with the guide vane 122. The first gear 1321 rotates under the drive of the drive motor 131, thereby driving the guide vane 122 connected to the first gear 1321 to rotate.

[0047] Specifically, the drive assembly 132 in this embodiment may include a first gear 1321. One end of the first gear 1321 is connected to the output shaft of the drive motor 131, and the other end is connected to the guide vane 122. The drive motor 131 directly drives the first gear 1321 to rotate, thereby causing the guide vane 122 to rotate synchronously. In the air handling device 100 of this embodiment, when the drive motor 131 drives the base plate 121 or the guide vane 122 to rotate, the guide vane 122 will inevitably rotate as soon as the drive motor 131 starts to rotate.

[0048] As a specific embodiment of this utility model, the first gear 1321 may further include a protrusion 1322. The drive assembly 132 may further include a second gear 1323, which is rotatably connected to the housing 110. The second gear 1323 may include at least one first groove 1324. When the first gear 1321 rotates, the protrusion 1322 enters the first groove 1324, driving the second gear 1323 to rotate, and when the protrusion 1322 exits the first groove 1324, the second gear 1323 remains stationary.

[0049] Specifically, in this embodiment, the first gear 1321 is provided with a protrusion 1322, and the second gear 1323 is provided with a first groove 1324. The protrusion 1322 and the first groove 1324 cooperate with each other to drive the second gear 1323 to rotate in stages when the first gear 1321 rotates, thereby driving the mechanism linked with the second gear 1323 to rotate in stages.

[0050] As a specific embodiment of this utility model, each drive component 132 may further include a third gear 1325, which is coaxially arranged with the first gear 1321 and rotates with the first gear 1321. The second gear 1323 has at least two grooves 1326, which are located on both sides of the first groove 1324. The grooves 1326 contact the outer periphery of the third gear 1325 when the first groove 1324 separates from the protrusion 1322.

[0051] Specifically, in this embodiment, by setting the third gear 1325 to contact the groove 1326, the position of the second gear 1323 can be restricted, thereby restricting the position of the first groove 1324 on the second gear 1323, and avoiding misalignment between the first groove 1324 and the protrusion 1322 on the first gear 1321, which would prevent them from being unable to cooperate with each other.

[0052] Specifically, the third gear 1325 may include a second groove 1327, which is used to avoid the second gear 1323 when the protrusion 1322 enters the first groove 1324.

[0053] Specifically, the drive component 132 in this embodiment may include a third gear 1325. The second groove 1327 provided on the third gear 1325 can avoid the second gear 1323, so as to prevent the second gear 1323 from interfering with the third gear 1325 during the rotation driven by the first gear 1321.

[0054] As a specific embodiment of the present invention, the drive component 132 of this embodiment may further include a fourth gear 1328, which is coaxially arranged with the second gear 1323 and rotates with the second gear 1323.

[0055] As a specific embodiment of this utility model, each drive component 132 may further include a fifth gear 1329, which is coaxially arranged with the first gear 1321. The fifth gear 1329 meshes with the fourth gear 1328 to rotate under the drive of the fourth gear 1328. The fifth gear 1329 is connected to the base plate 121 to drive the base plate 121 to rotate when the fifth gear 1329 rotates.

[0056] Each drive assembly 132 may include a fourth gear 1328 and a fifth gear 1329. The rotation of the second gear 1323 is transmitted from the fourth gear 1328 to the fifth gear 1329. The fifth gear 1329 is then connected to the base plate 121, driving the base plate 121 to rotate. The first gear 1321 and the second gear 1323 cooperate with each other, causing the first gear 1321 and the second gear 1323 to rotate in opposite directions. Since the fourth gear 1328 rotates synchronously with the second gear 1323, and the fifth gear 1329 meshes with the fourth gear 1328, the fifth gear 1329 ultimately rotates in the opposite direction to the second gear 1323. Consequently, the fifth gear 1329 rotates in the same direction as the first gear 1321 and follows the phased rotation of the second gear 1323. Therefore, the final rotation direction of the base plate 121 is the same as the rotation direction of the guide vanes 122 on the base plate 121, and the base plate 121 rotates in phases. Furthermore, since the base plate 121, the fifth gear 1329, and the first gear 1321 are all coaxially arranged, the guide vane 122, which ultimately rotates coaxially with the first gear 1321, can also rotate coaxially with the base plate 121.

[0057] As a specific embodiment of this utility model, each base plate 121 has multiple guide vanes 122. The multiple guide vanes 122 are linked by a connecting rod so that when one guide vane 122 is rotated in a controlled manner, the other guide vanes 122 rotate synchronously.

[0058] Specifically, in this embodiment, there are multiple guide vanes 122, which are linked together. When one guide vane 122 rotates under the drive of the first gear 1321, it can drive all the guide vanes 122 to rotate. In this embodiment, the guide vanes 122 are linked together by a connecting rod (not shown in the figure), and the multiple guide vanes 122 are parallel to each other or located on the same plane, and the rotation angle of the multiple guide vanes 122 is the same.

[0059] In a specific embodiment of this utility model, each guide vane 122 has a radially extending connecting arm (not shown in the figure) at its pivot point. The connecting arms at multiple guide vanes 122 have the same length. One end of the connecting arm is rotatably connected to the corresponding guide vane 122, and the other end is connected to a connecting rod. Specifically, the fact that each guide vane 122 has a connecting arm in this embodiment, and that all connecting arms have the same length, ensures that all guide vanes 122 rotate at the same angle. Furthermore, when all guide vanes 122 are arranged in parallel, all guide vanes 122 rotate synchronously.

[0060] As a specific embodiment of this utility model, such as Figure 6 As shown, this embodiment provides a method for controlling the air outlet angle of an air handling device 100. The control method includes:

[0061] Step S100: Based on the control command, determine whether the air outlet angle of the air guide mechanism 120 is greater than the preset angle; wherein, the control command includes the air outlet angle; when the air outlet angle is less than or equal to the preset angle, execute step S200; when the air outlet angle is greater than the preset angle, execute step S300.

[0062] Step S200: Control the drive motor 131 to drive the first gear 1321 to rotate from the initial position along the first preset direction, so as to drive the guide vane 122 to rotate to the air outlet angle; wherein, the initial position is the position of the first gear 1321 when the protrusion 1322 of the first gear 1321 is located at the opening position of the first groove 1324 of the second gear 1323.

[0063] In step S300, the drive motor 131 is controlled to drive the first gear 1321 to rotate from the initial position along the second preset direction, so as to drive the base plate 121 and the guide blade 122 of the air guide mechanism 120 to rotate together to the air outlet angle; wherein, the second preset direction is opposite to the first preset direction.

[0064] Specifically, in this embodiment, the drive mechanism 130 drives the drive assembly 132, which in turn drives the base plate 121 and / or the guide vane 122 to rotate. When the air outlet angle is small, it is only necessary to drive the guide vane 122 to rotate to achieve the purpose of sweeping. However, when the air outlet angle is large, it is not enough to drive the guide vane 122 to rotate. In this case, the base plate 121 can be driven to rotate at the same time as the guide vane 122 to achieve the purpose of a large sweeping angle.

[0065] As a specific embodiment of this utility model, the control method of this embodiment may further include:

[0066] When a shutdown command is received, the control drive motor 131 drives the first gear 1321 to rotate to the initial position.

[0067] Specifically, in this embodiment, when a shutdown command is received, driving the first gear 1321 to rotate to the initial position ensures that the base plate 121 and the guide vanes 122 return to their original positions and are both located within the housing 110, which is beneficial for the next drive. Specifically, in the initial position of the first gear 1321 in this embodiment, multiple guide vanes are on the same plane, and this plane is perpendicular to the air outlet direction at the air outlet duct 111 of the housing 110.

[0068] Specifically, the control method and operation steps of this embodiment for driving the corresponding base plate 121 and the air guide blades 122 located on the base plate 121 to rotate by a driving mechanism 130 are as follows:

[0069] When the received output angle is greater than the preset angle, the state of the drive mechanism 131 is as follows: Figure 7 (a)- Figure 7 As shown in (d), the state of the guide vane 122 and the base 121 is as follows. Figure 8 (a)- Figure 8 As shown in (d), the drive motor 131 drives the first gear 1321 to rotate counterclockwise from its initial position. At this time, the guide vane 122 rotates counterclockwise along with the first gear 1321. The first gear 1321 enters the first groove 1324 of the second gear 1323 through the protrusion 1322, thereby driving the second gear 1323 to rotate clockwise. Meanwhile, the third gear 1325 rotates counterclockwise along with the first gear 1321, and the second groove 1327 on the third gear 1325 provides clearance for the second gear 1323. The second gear 1323 drives the fourth gear 1328 to rotate clockwise, and the fourth gear 1328 then drives the fifth gear 1329 to rotate counterclockwise, thereby causing the base plate 121 to rotate counterclockwise. At this time, both the guide vane 122 and the base plate 121 rotate counterclockwise. When the first gear 1321 continues to move counterclockwise under the drive of the drive motor 131 until the protrusion 1322 disengages from the first groove 1324, the second gear 1323 stops moving. At this point, only the guide vane 122 rotates, while the base plate 121 does not rotate. During this movement, when the air outlet angle reaches the preset angle, the drive motor 131 is controlled to stop driving the first gear 1321 to rotate.

[0070] When the received air outlet angle is less than the preset angle, the state of the drive mechanism 131 is as follows: Figure 9 (a)- Figure 9 As shown in (d), the state of the guide vane 122 and the base 121 is as follows. Figure 10 (a)- Figure 10 As shown in (d), the drive motor 131 drives the first gear 1321 to rotate clockwise from its initial position. The first gear 1321 drives the guide vane 122 to rotate clockwise. At this time, since the protrusion 1322 of the first gear 1321 is away from the first groove 1324, the second gear 1323 will not be driven to rotate by the first gear 1321. Furthermore, since the third gear 1325 rotates clockwise with the first gear 1321, the outer circumference of the third gear 1325 cooperates with the groove 1326 of the second gear 1323, so that the second gear 1323 remains stationary under the constraint of the third gear 1325 until the guide vane 122 rotates to the air outlet angle, controlling the drive motor 131 to stop driving the first gear 1321.

[0071] When a shutdown command is received, the above movements are reversed and restored to the initial state, ensuring that the base plate 121 and the air guide blades 122 are both located in the air outlet duct 111 of the housing 110, and that the air guide blades 122 are located on the same plane to seal the air outlet duct 111.

[0072] Therefore, those skilled in the art should recognize that although many exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.

Claims

1. An air treatment device, characterized in that, Comprising: a housing comprising an air outlet duct; at least one air guide mechanism arranged at the air outlet duct and controlled to swing at the air outlet duct; each of the air guide mechanisms is further provided with a bottom plate and at least one air guide blade rotatably connected to the bottom plate; and at least one driving mechanism arranged at the corresponding air guide mechanism, and each of the driving mechanisms is connected to the bottom plate and at least one air guide blade on the bottom plate of the air guide mechanism to control the rotation of the corresponding bottom plate and air guide blade.

2. The air treatment device according to claim 1, wherein the driving mechanism comprises: a driving motor comprising an output shaft; and a driving assembly connected to the output shaft of the driving motor on one side, and connected to the bottom plate and the air guide blade on the other side to drive the bottom plate and / or the air guide blade to rotate under the drive of the driving motor.

3. The air treatment device according to claim 2, wherein the driving assembly comprises a first gear connected to one of the air guide blades and coaxially linked with the air guide blade; the first gear rotates under the drive of the driving motor, thereby driving the air guide blade connected to the first gear to rotate.

4. The air treatment device according to claim 3, wherein the first gear further comprises a protrusion; the driving assembly further comprises a second gear rotatably connected to the housing; the second gear comprises at least one first groove; when the protrusion enters the first groove, the second gear is driven to rotate, and when the protrusion comes out of the first groove, the second gear is stationary.

5. The air treatment device according to claim 4, wherein each of the driving mechanisms further comprises a third gear coaxially arranged with the first gear and following the rotation of the first gear; the third gear comprises a second groove for avoiding the second gear when the protrusion enters the first groove.

6. The air treatment device according to claim 5, wherein the third gear comprises a second groove for avoiding the second gear when the protrusion enters the first groove.

7. The air treatment device according to claim 4, wherein each of the driving mechanisms further comprises a fourth gear coaxially arranged with the second gear and following the rotation of the second gear.

8. The air treatment device according to claim 7, wherein each of the driving mechanisms further comprises a fifth gear coaxially arranged with the first gear; the fifth gear is engaged with the fourth gear to rotate under the drive of the fourth gear; the fifth gear is connected to the air guide mechanism to drive the air guide mechanism to rotate when the fifth gear rotates.

9. The air treatment device according to claim 1, wherein the number of air guide blades at each bottom plate is multiple. The plurality of the wind guide blades are connected by the connecting rod linkage, so that when one of the wind guide blades is controlled to rotate, the other wind guide blades are synchronously rotated.

10. The air treatment device of claim 9, wherein, A radially extending connecting arm is arranged at the rotation shaft of each of the wind guide blades, the lengths of the connecting arms arranged at the plurality of the wind guide blades are the same, one end of the connecting arm is connected with the corresponding wind guide blade, and the other end of the connecting arm is connected with the connecting rod.

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