Connecting shaft, rotating shaft switch mechanism and floor scrubber

Abstract

The present application relates to a connecting shaft, a rotating shaft switch mechanism and a floor scrubber. The connecting shaft comprises a lower rotating shaft, a middle rotating shaft and an upper rotating shaft. The lower rotating shaft is provided with a pitch stop part; the lower end of the middle rotating shaft is rotationally connected with the lower rotating shaft through the pitch rotating shaft, and the middle rotating shaft is provided with a roll stop part; the lower end of the upper rotating shaft is rotationally connected with the upper end of the middle rotating shaft through the roll rotating shaft; the pull rod is slidably arranged on the upper rotating shaft, and the lower end of the pull rod is connected with a pitch limit plate and a roll limit shaft; the pull rod has a locking position and a working unlocking position; when the pull rod is in the locking position, the roll limit shaft is limitedly matched with the roll stop part, and the pitch limit plate is limitedly matched with the pitch stop part, so that the upper rotating shaft, the middle rotating shaft and the lower rotating shaft remain locked; when the pull rod is in the working unlocking position, the roll limit shaft is separated from the roll stop part, and the pitch limit plate is separated from the pitch stop part, so that the upper rotating shaft and the middle rotating shaft can rotate relative to each other laterally, and the middle rotating shaft and the lower rotating shaft can rotate relative to each other in pitch.

Description

Technical Field

[0001] The present application relates to the technical field of cleaning equipment, and in particular to a connecting shaft, a rotating shaft switch mechanism and a floor scrubber. Background Art

[0002] A floor scrubber is a device specially used for cleaning the floor. It is usually composed of a fuselage, a chassis with a brush on the ground, and a rotating shaft mechanism. The chassis is hinged to the fuselage through the rotating shaft mechanism so that the fuselage can obtain rotational freedom in the pitch and roll directions relative to the chassis, meeting the use needs in different spatial conditions, different ground conditions, different cleaning methods and other scenarios.

[0003] When the user is operating the floor scrubber to clean the floor, if he encounters temporary matters that need to be handled first and is forced to leave the floor scrubber, he needs to find a suitable place to lean on and park the floor scrubber. The leaning parking method requires finding a suitable leaning position, and the parking operation is cumbersome and inconvenient, and inefficient. On the other hand, there is a safety risk that the machine body may slip from the leaning position and be damaged by collision. Summary of the invention

[0004] Based on this, it is necessary to provide a connecting shaft, a rotating shaft switch mechanism and a floor scrubber to solve the problem of temporary parking of floor scrubbers in the prior art.

[0005] In a first aspect of the present application, a connecting shaft is provided, comprising:

[0006] A lower rotating shaft, wherein the lower rotating shaft is provided with a pitch stop portion;

[0007] A central rotating shaft, the lower end of which is rotatably connected to the lower rotating shaft via a pitch rotating shaft, and the central rotating shaft is provided with a roll stopper;

[0008] an upper rotating shaft, wherein the lower end of the upper rotating shaft is rotatably connected to the upper end of the middle rotating shaft via a rolling rotating shaft; and

[0009] A pull rod, the pull rod is slidably arranged on the upper rotating shaft, and the lower end of the pull rod is connected to a pitch limit plate and a roll limit shaft;

[0010] In which, the pull rod has a locking position and a working unlocking position; when the pull rod is in the locking position, the roll limit axis is limited and cooperated with the roll stop part, and the pitch limit plate is limited and cooperated with the pitch stop part, so that the upper rotating shaft, the middle rotating shaft and the lower rotating shaft remain locked; when the pull rod is in the working unlocking position, the roll limit axis is separated from the roll stop part, and the pitch limit plate is separated from the pitch stop part, so that the upper rotating shaft and the middle rotating shaft can rotate relative to each other laterally, and the middle rotating shaft and the lower rotating shaft can rotate relative to each other in pitch.

[0011] The connecting shaft of the present invention is applied to a floor scrubber to connect the chassis with the fuselage. Specifically, the lower shaft is connected to the middle shaft through the pitch shaft, so that the fuselage and the chassis can obtain the rotational freedom of front and rear pitch rotation. The middle shaft is connected to the upper shaft through the roll shaft, so that the fuselage and the chassis can obtain the rotational freedom of lateral rotation. Furthermore, the pull rod of the present invention is connected with a pitch limit plate and a roll limit shaft, and the pull rod has a locking position and a working unlocking position. When the floor scrubber is working normally, the pull rod is in the working unlocking position. At this time, the pitch limit plate and the pitch stop part, as well as the roll limit shaft and the roll stop part, are kept in a separated matching state, so that the upper shaft and the middle shaft are connected. The axes maintain relative lateral rotation, and the middle rotating shaft and the lower rotating shaft maintain the rotational freedom of relative pitch rotation, so that the floor scrubber can perform cleaning operations normally; when it is necessary to temporarily stop the operation of the floor scrubber, the user drives the pull rod to move, so as to drive the roll limit shaft and the roll stop part to cooperate with each other, and the pitch limit plate and the pitch stop part to cooperate with each other, so that the upper rotating shaft, the middle rotating shaft and the lower rotating shaft remain locked and lose the rotational freedom of relative rotation. At this time, the fuselage can be fixed to the chassis through the connecting shaft, and there is no need for the user to support it, nor to lean on an object for the floor scrubber to lean on and support it. At the same time, there is no need to place the floor scrubber on the ground, which realizes the needs for fast, convenient, time-saving and labor-saving temporary stop operations of the floor scrubber.

[0012] In a second aspect of the present application, there is also provided a shaft switch mechanism, comprising:

[0013] A connecting shaft as described above;

[0014] a pulling mechanism connected to the pull rod; and

[0015] A switch mechanism is connected to the upper rotating shaft and the pull rod, and the switch mechanism has a locked state and an unlocked state. When the switch mechanism is in the locked state, the pull rod is maintained in the locked position, and when the switch mechanism is in the unlocked state, the pull rod is maintained in the working unlocked position.

[0016] In a third aspect of the present application, a floor scrubber is provided, comprising:

[0017] The shaft switch mechanism as described above;

[0018] a fuselage, the bottom of which is connected to the upper end of the upper rotating shaft; and

[0019] A chassis, the top of which is connected to the lower end of the lower rotating shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application.

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 The figure is a schematic structural diagram of a floor scrubber according to an embodiment.

[0023] Figure 2 The figure is a schematic structural diagram of a rotary shaft switch mechanism according to an embodiment.

[0024] Figure 3 for Figure 2 Axial cross-sectional structure diagram.

[0025] Figure 4 This is the assembly structure diagram of the pull rod and the switch mechanism.

[0026] Description of reference numerals:

[0027] 100, floor scrubber; 10, connecting shaft; 11, lower rotating shaft; 111, pitch stop groove; 112, storage stop groove; 113, arc surface; 12, middle rotating shaft; 121, roll limit hole; 121a, slot; 122, guide groove; 13, upper rotating shaft; 14, pull rod; 141, waist-shaped through groove; 15, pitch limit plate; 151, arc groove; 16, roll limit shaft; 17, support elastic member; 18, pressure Elastic member; 19, pitch axis; 19a, roll axis; 20, pulling mechanism; 21, handle; 22, transmission body; 23, friction reducing sleeve; 30, switch mechanism; 31, mounting seat; 32, switch seat; 321, locking step; 322, unlocking step; 323, annular sink; 33, switch body; 34, retaining elastic member; 35, first guide structure; 36, second guide structure; 40, fuselage; 50, chassis. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0029] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0030] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0031] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0032] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0033] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0034] See also Figure 1 , is a floor scrubber 100 shown in an embodiment of the present application, which is specifically a vertical floor scrubber 100. When working, the floor scrubber 100 moves on the ground with the help of the push and pull force applied by the user, the driving force of the floor scrubber 100 itself, or a combination of the two, to complete the cleaning operation of the ground.

[0035] Please continue reading Figure 2 and Figure 3 , exemplarily, the floor scrubber 100 includes a shaft switch mechanism 30, a body 40 and a chassis 50. The shaft switch mechanism 30 includes a connecting shaft 10; the connecting shaft 10 includes a lower rotating shaft 11, a middle rotating shaft 12 and an upper rotating shaft 13. The bottom of the body 40 is connected to the upper end of the upper rotating shaft 13; the top of the chassis 50 is connected to the lower end of the lower rotating shaft 11. The connecting shaft 10 is used to provide a degree of rotational freedom so that the body 40 can rotate relative to the chassis 50 to meet different operational needs.

[0036] The chassis 50 is also provided with functional components such as a floor brushing mechanism and a dirt suction mechanism. The floor brushing mechanism scrubs the floor by rotating, vibrating or reciprocating to remove dirt on the floor. The dirt suction mechanism is used to suck and recover dirt generated after scrubbing from the floor to clean the floor.

[0037] like Figure 2 As shown, a connecting shaft 10 of an embodiment is shown. In addition to the lower rotating shaft 11, the middle rotating shaft 12 and the upper rotating shaft 13, the connecting shaft 10 also includes a pull rod 14. The lower rotating shaft 11 is provided with a pitch stopper; the lower end of the middle rotating shaft 12 is rotatably connected with the lower rotating shaft 11 through a pitch rotating shaft 19, and the middle rotating shaft 12 is provided with a roll stopper; the lower end of the upper rotating shaft 13 is rotatably connected with the upper end of the middle rotating shaft 12 through a roll rotating shaft 19a; the pull rod 14 is slidably provided on the upper rotating shaft 13, and the lower end of the pull rod 14 is connected with a pitch limit plate 15 and a roll limit shaft 16.

[0038] Among them, the pull rod 14 has a locking position and a working unlocking position; when the pull rod 14 is in the locking position, the roll limit shaft 16 is limited by the roll stop part, and the pitch limit plate 15 is limited by the pitch stop part, so that the upper rotating shaft 13, the middle rotating shaft 12 and the lower rotating shaft 11 remain locked; when the pull rod 14 is in the working unlocking position, the roll limit shaft 16 is separated from the roll stop part, and the pitch limit plate 15 is separated from the pitch stop part, so that the upper rotating shaft 13 and the middle rotating shaft 12 can rotate relative to each other laterally, and the middle rotating shaft 12 and the lower rotating shaft 11 can rotate relative to each other in pitch.

[0039] It can be understood that the body 40 can rotate in pitch relative to the chassis 50, which means that the body 40 can flexibly change the pitch angle by rotating forward and backward according to the use needs; the body 40 can rotate horizontally relative to the chassis 50, which means that the body 40 can rotate horizontally back and forth relative to the chassis 50 to flexibly change the roll angle. The combination of different pitch angles and different roll angles allows the body 40 to have omnidirectional freedom relative to the chassis 50. In this way, it can meet the needs of users of different heights or strengths, and clean floors with different spatial conditions according to their respective operating habits.

[0040] In summary, the implementation of the technical solution of this embodiment will have the following beneficial effects: the connecting shaft 10 of this solution is applied to the floor scrubber 100 to connect the chassis 50 with the fuselage 40. Specifically, the lower rotating shaft 11 is rotatably connected with the middle rotating shaft 12 through the pitch rotating shaft 19, so that the fuselage 40 and the chassis 50 can obtain the rotational freedom of front and rear pitch rotation. The middle rotating shaft 12 is rotatably connected with the upper rotating shaft 13 through the roll rotating shaft 19a, so that the fuselage 40 and the chassis 50 can obtain the rotational freedom of lateral rotation. Based on this, the pull rod 14 of the present solution is connected with a pitch limit plate 15 and a roll limit shaft 16, and the pull rod 14 has a locked position and a working unlocked position. When the floor scrubber 100 is working normally, the pull rod 14 is in the working unlocked position, at which time the roll limit shaft 16 and the roll stopper, as well as the pitch limit plate 15 and the pitch stopper, all maintain a separated matching state, so that the upper rotating shaft 13 and the middle rotating shaft 12 maintain relative lateral rotation, and the middle rotating shaft 12 and the lower rotating shaft 11 maintain relative pitch rotation. The rotational freedom, so that the floor scrubber 100 can perform cleaning operations normally; when it is necessary to temporarily stop the operation of the floor scrubber 100, the user drives the pull rod 14 to stop the operation. The movable pull rod 14 moves to drive the roll limit shaft 16 to cooperate with the roll stop part and the pitch limit plate 15 to cooperate with the pitch stop part, so that the upper rotating shaft 13, the middle rotating shaft 12 and the lower rotating shaft 11 remain locked and lose the rotational freedom of relative rotation. At this time, the fuselage 40 can be fixed on the chassis 50 through the connecting shaft 10, and there is no need for the user to support it, nor is there any need for the floor scrubber 100 to lean on an object for support. At the same time, there is no need to place the floor scrubber 100 on the ground, which realizes a fast, convenient, time-saving and labor-saving temporary stop operation of the floor scrubber 100, and improves the temporary stop operation efficiency and experience of the floor scrubber 100.

[0041] Taking the vertical posture of the floor scrubber 100 as a reference, the pull rod 14 can move in the upper shaft 13, which specifically means that it can slide in the upper shaft 13 along the upper shaft 13 in the up and down direction. The upper shaft 13, the middle shaft 12 and the lower shaft 11 are arranged from top to bottom, and the pitch limit plate 15 and the roll limit shaft 16 are installed at the lower end of the pull rod 14 extending from the upper shaft 13.

[0042] In an optional embodiment, the pitch stopper is a pitch stopper groove 111 formed on the lower rotating shaft 11, and when the pull rod 14 slides toward the lower rotating shaft 11 and enters the locking position, the pitch stopper plate 15 is inserted into the pitch stopper groove 111. That is, the lower rotating shaft 11 and the middle rotating shaft 12 can be locked by only moving the pull rod 14 downward to insert the pitch stopper plate 15 into the pitch stopper groove 111, and the middle rotating shaft 12 loses the pitch rotation freedom with the lower rotating shaft 11, and the fuselage 40 can be kept upright and fixed above the chassis 50, meeting the needs of quick temporary stop operation.

[0043] Preferably, two pitch stop grooves 111 are provided and are respectively located on opposite sides of the lower rotating shaft 11 . The two pairs of ends of the pitch limit plate 15 can be respectively inserted into the corresponding pitch stop grooves 111 at the same time to form a more reliable plug-in limit stop.

[0044] Please continue reading Figure 2 Furthermore, the central shaft 12 is further provided with a guide groove 122. When the guide groove 122 is aligned with the pitch stop groove 111, the pitch limit plate 15 slides along the guide groove 122 and is inserted into the pitch stop groove 111. Under the guidance of the guide groove 122, the pitch limit plate 15 can be inserted into the pitch stop groove 111 more smoothly and accurately. Optionally, two guide grooves 122 are also provided, which are respectively provided in one-to-one correspondence with the ends of the pitch stop groove 111 and the pitch limit plate 15.

[0045] Please continue reading Figure 2 and Figure 3 In another embodiment, the roll stop portion is a roll limit hole 121 formed on the central shaft 12, and the roll limit hole 121 is provided with a slot portion 121a, and the slot portion 121a is arranged toward the pull rod 14. When the pull rod 14 slides toward the lower rotating shaft 11 and enters the locked position, the roll limit shaft 16 is inserted into the slot portion 121a and fixed; when the pull rod 14 slides away from the lower rotating shaft 11 and switches to the working unlocking position, the roll limit shaft 16 escapes from the slot portion 121a.

[0046] When the pull rod 14 is pulled upward, the roll limit shaft 16 moves upward to the outside of the slot 121a and is in a free state, so that the upper shaft 13 and the middle shaft 12 can obtain the rotational freedom of lateral rotation. When it is necessary to stop temporarily, the pull rod 14 is moved downward, and the roll limit shaft 16 is inserted into the slot 121a and is limited, thereby limiting the lateral rotational freedom of the upper shaft 13 and the middle shaft 12, thereby further ensuring that the fuselage 40 can be stably erected above the chassis 50 without external force intervention, so as to achieve temporary stop.

[0047] It can be understood that when the pull rod 14 moves down to the preset position, the roll limit shaft 16 and the slot portion 121a as well as the pitch limit plate 15 and the pitch stop groove 111 are simultaneously clamped and fixed, thereby being able to simultaneously constrain and fix the upper rotating shaft 13, the middle rotating shaft 12 and the lower rotating shaft 11, thereby improving the reliability and efficiency of temporary stopping.

[0048] Please continue reading Figure 2 In addition, based on any of the above embodiments, the pitch limit plate 15 is further provided with an arc groove 151 , the arc groove 151 is concentrically arranged with the roll axis 19 a , and the roll limit axis 16 is passed through the arc groove 151 . On the one hand, the roll limit shaft 16 is inserted into the circular arc groove 151, so that the pitch limit plate 15, the roll limit shaft 16 and the pull rod 14 are connected as a whole, and then when the pull rod 14 moves up and down, a linkage is formed among the three, so that the floor scrubber 100 can be quickly and reliably switched between the locked and working unlocked postures; on the other hand, in the working unlocked state, when the upper rotating shaft 13 rotates laterally relative to the middle rotating shaft 12, the roll limit shaft 16 slides synchronously in the circular arc groove 151, thereby playing a guiding and supporting limit role, and providing stability for the lateral reciprocating rotation of the fuselage 40; furthermore, the circular arc groove 151 and the roll rotating shaft 19a are concentrically arranged, so that the two can have a consistent rotation trajectory, avoiding the interference caused by the sliding of the roll limit shaft 16 in the circular arc groove 151 and affecting the rotation smoothness of the upper rotating shaft 13 with the roll rotating shaft 19a as the rotation center.

[0049] Please continue reading Figure 3 In another embodiment, the connecting shaft 10 further includes a supporting elastic member 17, the supporting elastic member 17 is sleeved on the pitching shaft 19, and the two elastic arms of the supporting elastic member 17 abut against the central rotating shaft 12 and the lower rotating shaft 11 respectively. The supporting elastic member 17 can be specifically a torsion spring. When the fuselage 40 tilts backward, the supporting elastic member 17 provides a reverse elastic torque to the central rotating shaft 12, that is, provides a force unloading effect of lifting the fuselage 40 in the reverse direction, thereby reducing the size of the supporting force output by the user to the fuselage 40, alleviating the burden on the user, and improving the user experience.

[0050] Typically, the floor brushing mechanism mounted on the chassis 50 includes at least one rotatable brush. When the floor scrubber 100 is operating normally, the brush rubs against the floor to remove stains. Figure 1In the illustrated embodiment, two disc brushes are mounted on the chassis 50 as the floor scrubbing mechanism of the floor scrubber 100. Of course, in other embodiments, floor scrubbing mechanisms such as roller brushes and plate brushes may also be provided as functional components for scrubbing the floor.

[0051] When the floor scrubber 100 is not needed or needs to be transported, in order to avoid taking up too much storage space, the floor scrubber 100 needs to be switched to the storage posture. At this time, the fuselage can be rotated downward with the pitch axis 19 as the rotation center until the fuselage 40 is parallel or approximately parallel to the chassis 50, and then the floor scrubber 100 is stood up, so that the chassis 50 is converted from a state parallel to the ground during operation or temporary stop to a state vertical or approximately vertical to the ground. This is the storage posture of the floor scrubber 100.

[0052] Please continue reading Figure 2 In order to prevent the body 40 and the chassis 50 of the floor scrubber 100 from rotating relative to each other when the floor scrubber 100 is in the storage position, in one embodiment, the lower rotating shaft 11 is further provided with a storage stop groove 112. When the lower rotating shaft 11 is rotated to the storage folding position, the pitch limit plate 15 is inserted into the storage stop groove 112. In the process of rotating the body 40 downward, the central rotating shaft 12 is synchronously turned downward. As the angle between the body 40 and the ground gradually decreases, until the pitch limit plate 15 is aligned with the storage stop groove 112, the force pull rod 14 moves downward, and the pitch limit plate 15 can be inserted into the storage stop groove 112, thereby achieving the effect of clamping and fixing the lower rotating shaft 11 and the chassis 50, and realizing storage locking.

[0053] Furthermore, a circular arc surface 113 is formed at the top of the lower rotating shaft 11, and the pitch stop groove 111 and the storage stop groove 112 are both formed by the inward concave shape of the circular arc surface 113, and the pitch limit plate 15 is slidably matched with the circular arc surface 113. The circular arc surface 113 supports and guides the pitch limit plate 15, ensuring that the pitch limit plate 15 is stable when sliding and switching between the pitch stop groove 111 and the storage stop groove 112, so that the pitch limit plate 15 is rotated to the corresponding angle and accurately locked.

[0054] Furthermore, in order to prevent the side of the chassis 40 of the floor scrubber 100 from directly contacting the ground when in the storage position, a support member can be provided at a suitable position of the chassis 50 of the floor scrubber 100 or the connecting shaft 10, and the support member includes a support point, which is used to support the floor scrubber 100 through the support point of the support member when the floor scrubber 100 is stored.

[0055] In order to provide a moving stroke and avoid interference and obstruction to the up and down movement of the pull rod 14, in one embodiment, the pull rod 14 is provided with a waist-shaped through groove 141 extending to the opposite sides, and the transverse rolling axis 19a can be movably passed through the waist-shaped through groove 141, and the length extension direction of the waist-shaped through groove 141 is consistent with the switching movement direction of the pull rod 14 between the locking position and the working unlocking position.

[0056] Please continue reading Figures 1 to 3 In addition to the above, the shaft switch mechanism 30 also includes a pulling mechanism 20 and a switch mechanism 30. The pulling mechanism 20 is connected to the pull rod 14. The switch mechanism 30 is connected to the upper shaft 13 and the pull rod 14. The switch mechanism 30 has a locked state and an unlocked state. When the switch mechanism 30 is in the locked state, the pull rod 14 remains in the locked position. When the switch mechanism 30 is in the unlocked state, the pull rod 14 remains in the working unlocked position.

[0057] Furthermore, the connecting shaft 10 further includes a pressure elastic member 18, the pull rod 14 is provided with a mounting hole, the pressure elastic member 18 is arranged in the mounting hole, and one end of the pressure elastic member 18 abuts against the bottom wall of the mounting hole, and the other end of the pressure elastic member 18 abuts against the upper rotating shaft 13, and the pressure elastic member 18 is used to apply an elastic thrust to the pull rod 14 in the direction of the lower rotating shaft 11. The pressure elastic member 18 can specifically be a compression spring or a hydraulic spring.

[0058] After the pressure elastic member 18 is installed, it is in a compressed state, so that the pressure elastic member 18 continuously applies a downward thrust to the pull rod 14. In this way, when the pull rod 14 is in a locked position and the switch mechanism 30 is in a locked state, the elastic thrust output by the pressure elastic member 18 can ensure that the roll limit axis 16 and the pitch limit plate 15 are always reliably stuck in the corresponding slot portion 121a and the pitch stop groove 111 (or the storage stop groove 112), ensuring the stability of the temporary parking (or storage) posture of the fuselage 40, and preventing the roll limit axis 16 and the pitch limit plate 15 from accidentally falling out and causing the fuselage 40 to fall over and break. When the pulling mechanism 20 is operated to move the pull rod 14 upward so that the roll limit shaft 16 and the pitch limit plate 15 are respectively disengaged from the slot 121a and the pitch stop groove 111 (or the storage stop groove 112), the switch mechanism 30 is synchronously switched from the locked state to the unlocked state. At this time, the switch mechanism 30 keeps the pull rod 14 in the working unlocked position, thereby preventing the pressure elastic member 18 from pushing the pull rod 14 downward. The upper rotating shaft 13, the middle rotating shaft 12 and the lower rotating shaft 11 continue to obtain the pitch and lateral rotation freedom due to unlocking, thereby ensuring that the scrubber 100 can continue to perform reliable self-cleaning work in the unlocked state.

[0059] In one embodiment, the pulling mechanism 20 includes a handle 21 and a transmission body 22. The transmission body 22 can be movably inserted into the upper rotating shaft 13 and the pull rod 14, and one end of the transmission body 22 is fixed to the pull rod 14, and the other end of the transmission body 22 is fixed to the handle 21. The handle 21 is used to be installed on the fuselage 40.

[0060] For example, the handle 21 is installed on the top of the machine body 40 and is convenient for the user to operate with his hand. In this way, if the floor scrubber 100 is in a temporary stop position (or storage position), when the handle 21 is pulled, the handle 21 can pull the pull rod 14 upward through the transmission body 22, so that the roll limit shaft 16 and the pitch limit plate 15 are respectively disengaged from the slot portion 121a of the roll limit shaft and the pitch stop groove 111 (or storage stop groove 112), and at the same time, the switch mechanism 30 is driven to switch from the locked state to the unlocked state, so that the upper rotating shaft 13, the middle rotating shaft 12 and the lower rotating shaft 11 obtain rotational freedom, and the floor scrubber 100 can normally perform pitch and lateral rotation. When the handle 21 is pulled again and the transmission body 22 pulls the pull rod 14 upward, the switch mechanism 30 switches from the unlocked state to the locked state. At this time, under the push of the elastic force of the pressure elastic member 18, the pull rod 14 drives the roll limit shaft 16 and the pitch limit plate 15 to move downward together until the roll limit shaft 16 and the slot portion 121a and the pitch limit plate 15 and the pitch stop groove 111 (or the storage stop groove 112) are respectively clamped and fixed, the rotational freedom of the upper rotating shaft 13, the middle rotating shaft 12 and the lower rotating shaft 11 is constrained, and the fuselage 40 is locked in a temporary parking posture (or a storage posture).

[0061] The handle 21 may also be disposed at any position of the body 40 or the chassis 50 as long as it is convenient for the user to apply force to the pull rod 14 . For example, the handle may be disposed at a lower position on the rear side of the chassis 40 in the form of a pedal.

[0062] Optionally, the transmission body 22 is made of steel wire rope. Steel wire rope has high strength, is easy to obtain, and has low cost. Of course, in other embodiments, the transmission body 22 can also be a wire, chain, thin rod or other parts made of other materials.

[0063] Furthermore, the pulling mechanism 20 further includes a friction reducing sleeve 23, which is installed in the upper rotating shaft 13, and the transmission body 22 is slidably inserted into the friction reducing sleeve 23. The friction reducing sleeve 23 can effectively reduce the friction force of the steel wire rope sliding up and down, and prevent the steel wire rope from moving and getting stuck. Optionally, the friction reducing sleeve 23 can be any one of a metal sleeve, a plastic sleeve, etc.

[0064] Please continue reading Figures 2 to 4 In another embodiment, the switch mechanism 30 includes a mounting seat 31, a switch seat 32 and a switch body 33, and the mounting seat 31 is disposed on the upper rotating shaft 13. For example, the mounting seat 31 is a rectangular frame, which is sleeved on the outer portion of the upper end of the upper rotating shaft 13 and is connected and fixed to the upper rotating shaft 13 by at least one of screw connection, clamp connection, and bonding.

[0065] The switch body 33 is movably arranged on the mounting seat 31, and the switch seat 32 is arranged on the pull rod 14. For example, the pull rod 14 is provided with a recessed groove, and the switch seat 32 is installed in the recessed groove, which ensures that the switch seat 32 is installed more firmly on the one hand; on the other hand, it also prevents the switch seat 32 from protruding from the surface of the pull rod 14 and occupying too much installation space.

[0066] In addition, the switch base 32 has a locking step 321 and an unlocking step 322, the locking step 321 and the unlocking step 322 are arranged at intervals, and the locking step 321 is arranged farther away from the lower rotating shaft 11 than the unlocking step 322. That is, it can be understood that when the body 40 is erected, the locking step 321 is located above the unlocking step 322.

[0067] When the switch body 33 is engaged with the locking step 321, the pull rod 14 remains in the locked position, the pitch limit plate 15 is limited by the pitch stop part, the roll limit shaft 16 is limited by the roll stop part, and the upper rotating shaft 13, the middle rotating shaft 12 and the lower rotating shaft 11 remain locked; when the switch body 33 is engaged with the unlocking step 322, the pull rod 14 remains in the working unlocking position, the pitch limit plate 15 is separated from the pitch stop part, the roll limit shaft 16 is separated from the roll stop part, the upper rotating shaft 13 and the middle rotating shaft 12 can rotate relative to each other laterally, and the middle rotating shaft 12 and the lower rotating shaft 11 can rotate relative to each other in pitch.

[0068] That is, by cooperating with the switch body 33 and the locking step 321 or the unlocking step 322, the pull rod 14 can be maintained in the locked position or the working unlocked position, ensuring that the floor scrubber 100 can continue to be reliably stopped without accidentally unlocking and causing the body 40 to fall and be damaged, or avoiding accidental locking during normal operation, causing pitch and / or roll rotation jamming, affecting the user experience.

[0069] Please continue reading Figure 4 Furthermore, the switch seat 32 is provided with an annular sink 323, and the locking step 321 and the unlocking step 322 are both formed on the annular sink 323. The switch mechanism 30 also includes a retaining elastic member 34, and the retaining elastic member 34 is movably arranged on the mounting seat 31, and the retaining elastic member 34 is connected to the switch body 33, so that the switch body 33 can only rotate in a clockwise direction along the annular sink 323, so that the switch body 33 cyclically switches between the locking step 321 and the unlocking step 322.

[0070] Specifically, the retaining elastic member 34 is hingedly fixed to the mounting seat 31 by a screw, and the retaining elastic member 34 provides pressure to the bottom surface direction of the switch body 33 pressed against the annular sinking platform 323, thereby preventing the switch body 33 from being separated from the switch seat 32. The formed annular sinking platform 323 is equivalent to a track provided to the switch body 33 for circular motion, and with the elastic force applied to the switch body 33 by the retaining elastic member 34, along with the up and down reciprocating motion of the pull rod 14, the switch body 33 can only rotate along a specific clockwise direction of the annular sinking platform 323 (such as in the clockwise direction), so that the pull rod 14 is not pulled to move, and the switch body 33 will switch between the locking step 321 and the unlocking step 322 once, thereby meeting the use requirements of the scrubber 100 for continuous switching between the normal working posture and the locking posture.

[0071] In order to ensure that the switch body 33 moves smoothly and accurately between the locking step 321 and the unlocking step 322, in one embodiment, the annular sink 323 is provided with a first guide structure 35, and the first guide structure 35 is arranged between the locking step 321 and the unlocking step 322 to guide the switch body 33 to move from the locking step 321 to the unlocking step 322.

[0072] Furthermore, the annular sink 323 is further provided with a second guide structure 36 , which is arranged between the unlocking step 322 and the locking step 321 to guide the switch body 33 to move from the unlocking step 322 to the locking step 321 .

[0073] Specifically, the first guide structure 35 includes a first guide step surface, a first guide groove 122, a second guide step surface and a third guide step surface, and the second guide structure 36 includes a fourth guide step surface and a second guide groove 122. Each guide groove 122 and each guide step surface plays a relay guiding role in the movement of the switch body 33, and cooperates with the elastic force of the elastic member 34 to ensure that the switch body 33 moves circumferentially in a preset direction.

[0074] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A connecting shaft, characterized in that: include: A lower rotating shaft, wherein the lower rotating shaft is provided with a pitch stop portion; A central rotating shaft, the lower end of which is rotatably connected to the lower rotating shaft via a pitch rotating shaft, and the central rotating shaft is provided with a roll stopper; an upper rotating shaft, wherein the lower end of the upper rotating shaft is rotatably connected to the upper end of the middle rotating shaft via a rolling rotating shaft; and A pull rod, the pull rod is slidably arranged on the upper rotating shaft, and the lower end of the pull rod is connected to a pitch limit plate and a roll limit shaft; In which, the pull rod has a locking position and a working unlocking position; when the pull rod is in the locking position, the roll limit axis is limited and cooperated with the roll stop part, and the pitch limit plate is limited and cooperated with the pitch stop part, so that the upper rotating shaft, the middle rotating shaft and the lower rotating shaft remain locked; when the pull rod is in the working unlocking position, the roll limit axis is separated from the roll stop part, and the pitch limit plate is separated from the pitch stop part, so that the upper rotating shaft and the middle rotating shaft can rotate relative to each other laterally, and the middle rotating shaft and the lower rotating shaft can rotate relative to each other in pitch.

2. The connecting shaft according to claim 1, characterized in that: The pitch stop portion is a pitch stop groove formed on the lower rotating shaft. When the pull rod slides toward the lower rotating shaft and enters a locking position, the pitch limit plate is inserted into the pitch stop groove.

3. The connecting shaft according to claim 2, characterized in that: The central rotating shaft is further provided with a guide groove. When the guide groove is aligned with the pitch stop groove, the pitch limit plate slides along the guide groove and is inserted into the pitch stop groove.

4. The connecting shaft according to claim 1, characterized in that: The roll stop portion is a roll limit hole formed on the central rotating shaft, and the roll limit hole is provided with a slot portion, and the notch of the slot portion is arranged toward the pull rod. When the pull rod slides toward the lower rotating shaft and enters the locking position, the roll limit shaft is snapped into the slot portion and fixed; when the pull rod slides away from the lower rotating shaft and switches to the working unlocking position, the roll limit shaft disengages from the slot portion.

5. The connecting shaft according to claim 1, characterized in that: The pitch limit plate is further provided with an arc groove, the arc groove is arranged concentrically with the roll rotation axis, and the roll limit axis passes through the arc groove.

6. The connecting shaft according to claim 1, characterized in that: The connecting shaft further comprises a supporting elastic member, the supporting elastic member is sleeved on the pitch rotating shaft, and two elastic arms of the supporting elastic member abut against the middle rotating shaft and the lower rotating shaft respectively.

7. The connecting shaft according to claim 1, characterized in that: The connecting shaft also includes a pressure elastic part. The pull rod is provided with a mounting hole. The pressure elastic part is arranged in the mounting hole, and one end of the pressure elastic part abuts against the bottom wall of the mounting hole, and the other end of the pressure elastic part abuts against the upper rotating shaft. The pressure elastic part is used to apply an elastic thrust to the pull rod toward the lower rotating shaft.

8. The connecting shaft according to claim 2, characterized in that: The lower rotating shaft is also provided with a storage stop groove, and when the lower rotating shaft is rotated to the storage and folding position, the pitch limit plate is inserted into the storage stop groove.

9. The connecting shaft according to claim 8, characterized in that: The top of the lower rotating shaft is formed with an arc surface, the pitch stop groove and the storage stop groove are both formed by the inward concave of the arc surface, and the pitch limit plate is slidably matched with the arc surface.

10. The connecting shaft according to claim 1, characterized in that: The pull rod is provided with a waist-shaped through groove extending to opposite sides, and the transverse rolling shaft can be movably passed through the waist-shaped through groove. The length extension direction of the waist-shaped through groove is consistent with the switching movement direction of the pull rod between the locking position and the working unlocking position.

11. A rotary shaft switch mechanism, characterized in that: include: The connecting shaft according to any one of claims 1 to 10; A pulling mechanism connected to the pull rod; as well as, A switch mechanism is connected to the upper rotating shaft and the pull rod, and the switch mechanism has a locked state and an unlocked state. When the switch mechanism is in the locked state, the pull rod is maintained in the locked position, and when the switch mechanism is in the unlocked state, the pull rod is maintained in the working unlocked position.

12. The rotary shaft switch mechanism according to claim 11, characterized in that: The switch mechanism comprises a mounting seat, a switch seat and a switch body, wherein the mounting seat is arranged on the upper rotating shaft, the switch body is movably arranged on the mounting seat, the switch seat is arranged on the pull rod, and the switch seat has a locking step and an unlocking step, the locking step is arranged at an interval from the unlocking step, and the locking step is arranged farther from the lower rotating shaft than the unlocking step; When the switch body is engaged with the locking step, the pull rod is maintained in the locked position, the roll limit shaft is limited and cooperated with the roll stop part, the pitch limit plate is limited and cooperated with the pitch stop part, and the upper rotating shaft, the middle rotating shaft and the lower rotating shaft are kept locked; when the switch body is engaged with the unlocking step, the pull rod is maintained in the working unlocking position, the roll limit shaft is separated from the roll stop part, the pitch limit plate is separated from the pitch stop part, the upper rotating shaft and the middle rotating shaft can rotate relative to each other laterally, and the middle rotating shaft and the lower rotating shaft can rotate relative to each other in pitch.

13. The rotary shaft switch mechanism according to claim 12, characterized in that: The switch seat is provided with an annular sink, and the locking step and the unlocking step are both formed on the annular sink. The switch mechanism also includes a retaining elastic member, which is movably arranged on the mounting seat, and the retaining elastic member is connected to the switch body so that the switch body can only rotate in a clockwise direction along the annular sink, so that the switch body cyclically switches between the locking step and the unlocking step.

14. The rotary shaft switch mechanism according to claim 13, characterized in that: The annular sink is provided with a first guide structure, and the first guide structure is arranged between the locking step and the unlocking step to guide the switch body to move from the locking step to the unlocking step.

15. The rotary shaft switch mechanism according to claim 13, characterized in that: The annular sink is further provided with a second guide structure, which is arranged between the unlocking step and the locking step to guide the switch body to move from the unlocking step to the locking step.

16. The rotary shaft switch mechanism according to claim 11, characterized in that: The pulling mechanism includes a handle and a transmission body, wherein the transmission body is movably arranged in the upper rotating shaft and the pull rod, and one end of the transmission body is fixed to the pull rod, and the other end of the transmission body is fixed to the handle, and the handle is used to be installed on the fuselage.

17. The rotary shaft switch mechanism according to claim 16, characterized in that: The pulling mechanism further comprises a friction reducing sleeve, wherein the friction reducing sleeve is arranged in the upper rotating shaft, and the transmission body is slidably arranged in the friction reducing sleeve.

18. A floor scrubber, characterized in that: include: The shaft switch mechanism according to any one of claims 11 to 17; A fuselage, the bottom of which is connected to the upper end of the upper rotating shaft; as well as, A chassis, the top of which is connected to the lower end of the lower rotating shaft.

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