Production link automatic control weighing statistical scale

Abstract

The utility model discloses a production link automatic control weighing statistical scale, which comprises a mounting rack assembly, a conveyor belt assembly and two telescopic plate assemblies are mounted on the mounting rack assembly, each telescopic plate assembly comprises a plurality of second connecting plates, screws, third connecting plates and through grooves, and the second connecting plates and the third connecting plates are arranged at intervals. Two through grooves are formed in the third connecting plate, screws are slidably connected into the through grooves, and the screws are in threaded connection with the second connecting plate; the installation frame assembly is designed to be telescopic, the conveying belt assembly folds the conveying belt through the multiple sets of driving rollers, when the installation frame assembly extends, the part, used for bearing materials, of the conveying belt can be automatically extended and kept in a tensioned state, and therefore the length adjusting function of the conveying belt is achieved; the angle of the mounting rack assembly can be adjusted, application requirements of different scenes can be met, and compared with an existing belt weigher, the belt weigher is more powerful in function and more practical.

Description

Technical Field

[0001] The utility model relates to the technical field of weighing devices, in particular to an automatic weighing and statistical scale for production links. Background Art

[0002] A belt scale is a commonly used weighing device. Its principle is to use a feeding device to discharge the material into the head end of the equipment, and then transport the material to the end of the equipment through a conveyor belt. During this process, the gravity sensor on the equipment bracket obtains the weight data of the material. When the weight reaches the set value, the baffle at the end of the equipment is opened to transfer the material out of the device. This type of belt scale has the following defects: First, the length of the conveyor belt cannot be adjusted and cannot meet different usage requirements. A shorter belt scale cannot be used for weighing large quantities or large volumes of objects, and a longer belt scale will occupy a larger space. Second, the conveying angle cannot be adjusted. If it needs to be transported to a higher place, an additional inclined conveyor belt needs to be added, which increases the equipment cost. Therefore, the existing belt scale can no longer meet the demand. Utility Model Content

[0003] The utility model aims to provide a production link automatic control weighing statistical scale to solve the problems raised in the above background technology.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions: an automatic controlled weighing and statistical scale for a production link, comprising a mounting frame assembly, on which a conveyor belt assembly and two telescopic plate assemblies are installed, the telescopic plate assembly comprising a second connecting plate, a screw, a third connecting plate and a through slot, a plurality of second connecting plates and a plurality of third connecting plates are arranged at intervals, two through slots are provided on the third connecting plate, screws are slidably connected in the through slots, and the screws are threadedly connected to the second connecting plate.

[0005] Preferably, the mounting frame assembly includes a first mounting frame, a first motor, a first threaded rod, a nut, a connecting pipe, a first fixed frame, a first support leg, a movable wheel, a connecting rod, a sliding sleeve, a second fixed frame, a support rod, an external thread, a support member, a third fixed frame, a first telescopic rod, a second support leg, a gravity sensor, a side plate, a first connecting plate, a limiting wheel, a second telescopic rod, a baffle and a controller. The first mounting frame is fixedly connected to the first motor, the output end of the first motor is fixedly connected to the first threaded rod, the first threaded rod is threadedly connected to the nut, the nut is fixedly connected to the connecting pipe, and the first threaded rod is sleeved in the connecting pipe, the first fixed frame is fixedly connected to the connecting pipe, the first fixed frame is fixedly connected to the connecting rod, the connecting rod is sleeved with the sliding sleeve, and the sliding sleeve is fixedly connected to the first mounting frame.

[0006] Preferably, a second fixing frame is provided on one side of the first fixing frame, and the second fixing frame is fixedly connected to the connecting rod, two support rods are fixedly connected to the second fixing frame, a support member is fixedly connected to the support rod, and the support member is fixedly connected to the third fixing frame, the third fixing frame is installed on the two telescopic plate assemblies, the other end of the telescopic plate assembly is installed with a first connecting plate, and the first connecting plate is fixedly connected to the first mounting frame, a side plate is hinged on the first connecting plate, a first telescopic rod is hinged on the side plate, and the first telescopic rod is hinged on the first mounting frame, the second telescopic rod is hinged on one of the side plates, a baffle is hinged on the output end of the second telescopic rod, and the two ends of the baffle are rotatably connected to the two side plates respectively.

[0007] Preferably, gravity sensors are fixedly connected to the two first supporting legs and the two second supporting legs, and the first supporting legs are fixedly connected to the first fixing frame through the gravity sensors, and the second supporting legs are fixedly connected to the first mounting frame through the gravity sensors, and movable wheels are fixedly connected to the lower surfaces of the two first supporting legs.

[0008] Preferably, the conveyor belt assembly includes a second motor, a first drive roller, a drive belt, a second drive roller, a first connecting frame, a third drive roller, a first sleeve, a spring, a second sleeve, a second connecting frame and a fourth drive roller, and the first drive roller, the second drive roller, the third drive roller and the fourth drive roller are all connected to the drive belt transmission, the first drive roller is rotatably connected to the side plate, the second drive roller is rotatably connected to the third fixed frame, a plurality of third drive rollers are rotatably connected to the first connecting frame, the first connecting frame is fixedly connected to the support member, and a plurality of fourth drive rollers are rotatably connected to the second connecting frame.

[0009] Preferably, the second motor is fixedly connected to the side plate, and the output end of the second motor is fixedly connected to the first transmission roller.

[0010] Preferably, a second sleeve is fixedly connected to the second connecting frame, and the second sleeve is slidably connected to the support rod, the support rod is provided with an external thread, the first sleeve is threadedly connected to the external thread, a spring is sleeved on the support rod, and one end of the spring is arranged on the first sleeve, and the other end is arranged on the second sleeve.

[0011] Preferably, the two first connecting plates are both equipped with limiting wheels, and the limiting wheels are rollingly connected to the transmission belt.

[0012] Preferably, a controller is fixedly connected to the first mounting frame, and the controller is electrically connected to the first motor, the first telescopic rod, the gravity sensor, the second telescopic rod and the second motor respectively.

[0013] The utility model provides an automatic controlled weighing and statistical scale for production links, which has the following advantages: the mounting frame assembly of the utility model is designed to be retractable, and the conveyor belt assembly utilizes multiple sets of transmission rollers to fold the transmission belt. When the mounting frame assembly is extended, the portion of the transmission belt used to carry materials can be automatically extended and maintained in a tensioned state, thereby realizing the transmission belt length adjustment function; the mounting frame assembly of the utility model has an adjustable angle, which can meet the application requirements of different scenarios. Compared with the existing belt scales, it is more powerful and more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

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

[0016] Figure 2 It is a schematic diagram of the overall main structure of the utility model;

[0017] Figure 3 It is a three-dimensional structural schematic diagram of the mounting frame assembly of the utility model;

[0018] Figure 4 for Figure 3 A magnified view of the structure in the middle A area;

[0019] Figure 5 for Figure 3 A magnified view of the structure in the middle B area;

[0020] Figure 6 It is a three-dimensional structural schematic diagram of the conveyor belt assembly of the utility model.

[0021] In the figure: 1, mounting frame assembly; 11, first mounting frame; 12, first motor; 13, first threaded rod; 14, nut; 15, connecting pipe; 16, first fixing frame; 17, first supporting leg; 18, moving wheel; 19, connecting rod; 110, sliding sleeve; 111, second fixing frame; 112, supporting rod; 113, external thread; 114, supporting member; 115, third fixing frame; 116, first telescopic rod; 117, second supporting leg; 118, gravity sensor; 119, side plate; 120, first Connecting plate; 121, limiting wheel; 122, second telescopic rod; 123, baffle; 124, controller; 2, conveyor belt assembly; 21, second motor; 22, first transmission roller; 23, transmission belt; 24, second transmission roller; 25, first connecting frame; 26, third transmission roller; 27, first sleeve; 28, spring; 29, second sleeve; 210, second connecting frame; 211, fourth transmission roller; 3, telescopic plate assembly; 31, second connecting plate; 32, screw; 33, third connecting plate; 34, through groove. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-6The utility model provides an embodiment: a production link automatic control weighing statistical scale, including a mounting frame assembly 1, a conveyor belt assembly 2 and two telescopic plate assemblies 3 are installed on the mounting frame assembly 1, the telescopic plate assembly 3 includes a second connecting plate 31, a screw 32, a third connecting plate 33 and a through slot 34, a plurality of second connecting plates 31 and a plurality of third connecting plates 33 are arranged at intervals, and two through slots 34 are provided on the third connecting plate 33, a screw 32 is slidably connected in the through slot 34, and the screw 32 is threadedly connected to the second connecting plate 31, and the screw 32 cooperates with the through slot 34 to realize the sliding connection between the adjacent second connecting plates 31 and the third connecting plates 33, thereby realizing the telescopic function of the telescopic plate assembly 3;The mounting frame assembly 1 includes a first mounting frame 11, a first motor 12, a first threaded rod 13, a nut 14, a connecting pipe 15, a first fixing frame 16, a first supporting leg 17, a moving wheel 18, a connecting rod 19, a sliding sleeve 110, a second fixing frame 111, a supporting rod 112, an external thread 113, a supporting member 114, a third fixing frame 115, a first telescopic rod 116, a second supporting leg 117, a gravity sensor 118, a side plate 119, a first connecting plate 120, a limiting wheel 121, a second telescopic rod 122, a baffle 123 and a controller 124. A first motor 12 is fixedly connected, and a first threaded rod 13 is fixedly connected to the output end of the first motor 12. A nut 14 is threadedly connected to the first threaded rod 13, and a connecting pipe 15 is fixedly connected to the nut 14. The first threaded rod 13 is sleeved in the connecting pipe 15, and a first fixing frame 16 is fixedly connected to the connecting pipe 15. A connecting rod 19 is fixedly connected to the first fixing frame 16, and a sliding sleeve 110 is sleeved on the connecting rod 19, and the sliding sleeve 110 is fixedly connected to the first mounting frame 11. A second fixing frame 111 is provided on one side of the first fixing frame 16, and the second fixing frame 111 is fixedly connected On the connecting rod 19, two support rods 112 are fixedly connected to the second fixing frame 111, and the support rod 112 is fixedly connected with a support member 114, and the support member 114 is fixedly connected to the third fixing frame 115, and the third fixing frame 115 is installed on two telescopic plate assemblies 3, and the other end of the telescopic plate assembly 3 is installed with a first connecting plate 120, and the first connecting plate 120 is fixedly connected to the first mounting frame 11, and the first connecting plate 120 is hinged with a side plate 119, and the side plate 119 is hinged with a first telescopic rod 116, and the first telescopic rod 116 is hinged to the first mounting frame 11 , a second telescopic rod 122 is hinged on one side plate 119, a baffle 123 is hinged on the output end of the second telescopic rod 122, and both ends of the baffle 123 are rotatably connected to the two side plates 119, the two first supporting legs 17 and the two second supporting legs 117 are fixedly connected with gravity sensors 118, and the first supporting leg 17 is fixedly connected to the first fixing frame 16 through the gravity sensor 118, and the second supporting leg 117 is fixedly connected to the first mounting frame 11 through the gravity sensor 118, and the lower surfaces of the two first supporting legs 17 are fixedly connected with moving wheels 18;The mounting frame assembly 1 can adjust both the angle and the length. When adjusting the length, by starting the first motor 12 on the first mounting frame 11, the first motor 12 drives the nut 14 through the first threaded rod 13, and the nut 14 drives the connecting pipe 15 to move, and the first fixing frame 16 on the connecting pipe 15 moves accordingly, and the connecting rod 19 on the first fixing frame 16 slides along the sliding sleeve 110 to guide the first fixing frame 16, and the second fixing frame 111 on the connecting rod 19 will also move accordingly, and the second fixing frame 111 drives the supporting member 114 through the supporting rod 112, and the supporting member 114 drives the third fixing frame 115, and the third fixing frame 115 drives the telescopic plate assembly 3 and the conveyor belt assembly 2 to extend. When adjusting the angle, the first telescopic rod 116 can be started. The first telescopic rod 116 drives one end of the side plate 119 to lift up, and the other end of the side plate 119 deflects on the first connecting plate 120; the conveyor belt assembly 2 includes a second motor 21, a first transmission roller 22, a transmission belt 23, a second transmission roller 24, a first connecting frame 25, a third transmission roller 26, a first sleeve 27, a spring 28, a second sleeve 29, a second connecting frame 210 and a fourth transmission roller 211, and the first transmission roller 22, the second transmission roller 24, the third transmission roller 26 and the fourth transmission roller 211 are all connected to the transmission belt 23, the first transmission roller 22 is rotatably connected to the side plate 119, the second transmission roller 24 is rotatably connected to the third fixed frame 115, and multiple third transmission rollers 26 are rotatably connected to the first connecting frame 25 The first connecting frame 25 is fixedly connected to the support member 114, and the plurality of fourth transmission rollers 211 are rotatably connected to the second connecting frame 210. The second motor 21 is fixedly connected to the side plate 119, and the output end of the second motor 21 is fixedly connected to the first transmission roller 22. The second connecting frame 210 is fixedly connected with a second sleeve 29, and the second sleeve 29 is slidably connected to the support rod 112. The support rod 112 is provided with an external thread 113, and the external thread 113 is threadedly connected with the first sleeve 27. The support rod 112 is sleeved with a spring 28, and one end of the spring 28 is arranged on the first sleeve 27, and the other end is arranged on the second sleeve 29. When adjusting the length, the moving third fixed frame 115 will drive the second transmission roller 24 As the fourth transmission roller 211 is installed, the second connecting frame 210 is movable, so the second transmission roller 24 drives the fourth transmission roller 211 through the transmission belt 23, so that the second connecting frame 210 moves up along the support rod 112 through the second sleeve 29, so that the available length of the transmission belt 23 for holding raw materials is increased. By rotating the first sleeve 27 on the external thread 113, the deformation degree of the spring 28 can be adjusted, so as to control the elastic force applied to the second sleeve 29, so as to adjust the tightness of the transmission belt 23. The third transmission roller 26 is used to assist the transmission of the transmission belt 23, and is also used to cooperate with the fourth transmission roller 211 to fold the transmission belt 23. The first connecting frame 25 is used to install the third transmission roller 26.The two first connecting plates 120 are both equipped with limit wheels 121, and the limit wheels 121 are rollingly connected to the transmission belt 23, and the limit wheels 121 are used to limit the bending position of the transmission belt 23; the first mounting frame 11 is fixedly connected with a controller 124, and the controller 124 is respectively electrically connected with the first motor 12, the first telescopic rod 116, the gravity sensor 118, the second telescopic rod 122 and the second motor 21, and the controller 124 is used for the control system of the bearing device.;

[0024] Working principle: When the utility model is used to weigh raw materials, the length and angle are adjusted according to the needs. The specific method is: the first motor 12 on the first mounting frame 11 is started by the controller 124, and the first motor 12 drives the nut 14 through the first threaded rod 13, and the nut 14 drives the connecting pipe 15 to move, and the first fixing frame 16 on the connecting pipe 15 moves accordingly, and the connecting rod 19 on the first fixing frame 16 slides along the sliding sleeve 110 to guide the first fixing frame 16, and the second fixing frame 111 on the connecting rod 19 also moves accordingly, and the second fixing frame 111 drives the supporting member 114 through the supporting rod 112, and the supporting member 114 drives the third fixing frame 115, and the third fixing frame 115 Drive the telescopic plate assembly 3; in this process, the distance between the second connecting plate 31 and the third connecting plate 33 will gradually increase, realizing the extension function of the telescopic plate assembly 3, and the screw 32 cooperates with the through groove 34 to realize the sliding connection between the adjacent second connecting plate 31 and the third connecting plate 33; at the same time, the second transmission roller 24 on the third fixed frame 115 moves accordingly, and since the second connecting frame 210 on which the fourth transmission roller 211 is installed is movable, the second transmission roller 24 drives the fourth transmission roller 211 through the transmission belt 23, so that the second connecting frame 210 moves up along the support rod 112 through the second sleeve 29, so that the available length of the transmission belt 23 for holding raw materials is increased, and the external thread is rotated The first sleeve 27 on 113 can adjust the deformation degree of the spring 28, so as to control the elastic force applied to the second sleeve 29, so as to adjust the tightness of the transmission belt 23; when adjusting the angle, the first telescopic rod 116 can be started, and the first telescopic rod 116 drives one end of the side plate 119 to lift, and the other end of the side plate 119 deflects on the first connecting plate 120, and the transmission belt 23 is limited by the limiting wheel 121; when producing, the raw material is conveyed to the transmission belt 23 by the feeding device, and the second motor 21 is started at the same time, and the second motor 21 drives the transmission belt 23 through the first transmission roller 22, and the transmission belt 23 delivers the raw material to the end until it is blocked by the baffle 123, and the gravity sensor The device 118 detects the weight data and sends it to the controller 124. When the weight reaches the preset value, the feeding device stops feeding, and the second telescopic rod 122 drives the baffle 123 to rotate and open, so that the raw material is transported out of the device. After the weight returns to zero, the second telescopic rod 122 drives the baffle 123 to rotate and close, waiting for the next weighing; wherein, the first support leg 17 is used to support the first fixed frame 16, the moving wheel 18 is used to assist the movement of the first support leg 17, the second support leg 117 is used to support the first mounting frame 11, the third transmission roller 26 is used to assist the transmission of the transmission belt 23, and is also used to cooperate with the fourth transmission roller 211 to fold the transmission belt 23, and the first connecting frame 25 is used to install the third transmission roller 26.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art may understand and implement it without creative effort.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A production process automatic weighing and statistical scale, comprising a mounting frame assembly (1), characterized in that: The mounting frame assembly (1) is provided with a conveyor belt assembly (2) and two telescopic plate assemblies (3), the telescopic plate assembly (3) comprising a second connecting plate (31), a screw (32), a third connecting plate (33) and a through slot (34), a plurality of second connecting plates (31) and a plurality of third connecting plates (33) are arranged at intervals, the third connecting plate (33) is provided with two through slots (34), a screw (32) is slidably connected in the through slot (34), and the screw (32) is threadedly connected to the second connecting plate (31).

2. The automatic weighing and statistical scale for production links according to claim 1, characterized in that: The mounting frame assembly (1) comprises a first mounting frame (11), a first motor (12), a first threaded rod (13), a nut (14), a connecting pipe (15), a first fixing frame (16), a first supporting leg (17), a moving wheel (18), a connecting rod (19), a sliding sleeve (110), a second fixing frame (111), a supporting rod (112), an external thread (113), a supporting member (114), a third fixing frame (115), a first telescopic rod (116), a second supporting leg (117), a gravity sensor (118), a side plate (119), a first connecting plate (120), a limiting wheel (121), and a second telescopic rod (122). , a baffle (123) and a controller (124); a first motor (12) is fixedly connected to the first mounting frame (11); a first threaded rod (13) is fixedly connected to the output end of the first motor (12); a nut (14) is threadedly connected to the first threaded rod (13); a connecting pipe (15) is fixedly connected to the nut (14); the first threaded rod (13) is sleeved in the connecting pipe (15); a first fixing frame (16) is fixedly connected to the connecting pipe (15); a connecting rod (19) is fixedly connected to the first fixing frame (16); a sliding sleeve (110) is sleeved on the connecting rod (19); and the sliding sleeve (110) is fixedly connected to the first mounting frame (11).

3. The automatic weighing and statistical scale for production links according to claim 2, characterized in that: A second fixing frame (111) is provided on one side of the first fixing frame (16), and the second fixing frame (111) is fixedly connected to the connecting rod (19), two supporting rods (112) are fixedly connected to the second fixing frame (111), supporting members (114) are fixedly connected to the supporting rods (112), and the supporting members (114) are fixedly connected to the third fixing frame (115), and the third fixing frame (115) is installed on the two telescopic plate assemblies (3), and the other end of the telescopic plate assembly (3) is installed with a first connecting plate (120 ), and the first connecting plate (120) is fixedly connected to the first mounting frame (11), the first connecting plate (120) is hinged with a side plate (119), the side plate (119) is hinged with a first telescopic rod (116), and the first telescopic rod (116) is hinged to the first mounting frame (11), one of the side plates (119) is hinged with a second telescopic rod (122), the output end of the second telescopic rod (122) is hinged with a baffle (123), and the two ends of the baffle (123) are respectively rotatably connected to the two side plates (119).

4. The automatic weighing and statistical scale for production links according to claim 2, characterized in that: The two first supporting legs (17) and the two second supporting legs (117) are both fixedly connected with gravity sensors (118), and the first supporting legs (17) are fixedly connected to the first fixing frame (16) via the gravity sensors (118), and the second supporting legs (117) are fixedly connected to the first mounting frame (11) via the gravity sensors (118), and the lower surfaces of the two first supporting legs (17) are both fixedly connected with moving wheels (18).

5. The automatic weighing and statistical scale for production links according to claim 1, characterized in that: The conveyor belt assembly (2) comprises a second motor (21), a first transmission roller (22), a transmission belt (23), a second transmission roller (24), a first connecting frame (25), a third transmission roller (26), a first sleeve (27), a spring (28), a second sleeve (29), a second connecting frame (210) and a fourth transmission roller (211), wherein the first transmission roller (22), the second transmission roller (24), the third transmission roller (26) and the fourth transmission roller (211) are all connected to the transmission belt (23) in a transmission manner, the first transmission roller (22) is rotatably connected to the side plate (119), the second transmission roller (24) is rotatably connected to the third fixed frame (115), a plurality of third transmission rollers (26) are rotatably connected to the first connecting frame (25), the first connecting frame (25) is fixedly connected to the support member (114), and a plurality of fourth transmission rollers (211) are rotatably connected to the second connecting frame (210).

6. The automatic weighing and statistical scale for production links according to claim 5, characterized in that: The second motor (21) is fixedly connected to the side plate (119), and the output end of the second motor (21) is fixedly connected to the first transmission roller (22).

7. The automatic weighing and statistical scale for production links according to claim 5, characterized in that: A second sleeve (29) is fixedly connected to the second connecting frame (210), and the second sleeve (29) is slidably connected to the support rod (112). The support rod (112) is provided with an external thread (113), and the first sleeve (27) is threadedly connected to the external thread (113). A spring (28) is sleeved on the support rod (112), and one end of the spring (28) is arranged on the first sleeve (27), and the other end is arranged on the second sleeve (29).

8. The automatic weighing and statistical scale for production links according to claim 2, characterized in that: The two first connecting plates (120) are both equipped with limiting wheels (121), and the limiting wheels (121) are rollingly connected to the transmission belt (23).

9. The automatic weighing and statistical scale for production links according to claim 2, characterized in that: A controller (124) is fixedly connected to the first mounting frame (11), and the controller (124) is electrically connected to the first motor (12), the first telescopic rod (116), the gravity sensor (118), the second telescopic rod (122) and the second motor (21) respectively.

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