CN113681527B

CN113681527B - Folding supporting leg of lifting working platform

Info

Publication number: CN113681527B
Application number: CN202110914838.1A
Authority: CN
Inventors: 应怀正; 陈建平
Original assignee: Hangzhou Sivge Machinery Co ltd
Current assignee: Hangzhou Sivge Machinery Co ltd
Priority date: 2021-08-10
Filing date: 2021-08-10
Publication date: 2022-09-30
Anticipated expiration: 2041-08-10
Also published as: CN113681527A

Abstract

The invention discloses a folding landing leg of a lifting working platform, which belongs to a stable supporting device, wherein the existing landing leg has overlarge volume, is difficult to store and is complex to operate; furthermore, the first support screw is shiftable between the second storage position and the second support position by screw-and-nut assembly. When the bolt is detached, the landing leg main body can be overturned to the first accommodating position for transposition, and the diagonal draw bar can be overturned around the third transverse pin shaft and is folded with the landing leg main body; in addition, the first supporting screw rod can also be shifted to the second accommodating position, so that the structure is more compact, the appearance size is smaller, and the folding is easy.

Description

Folding supporting leg of lifting working platform

Technical Field

The invention belongs to a stable supporting device, and particularly relates to a folding supporting leg of a lifting working platform.

Background

In order to ensure the stability of the lifting platform, the lifting platform chassis is usually provided with support legs. For example, the patent specification of the utility model with the publication number of CN201301207Y discloses a "turnover type leg", and the patent application with the publication number of CN103090171A discloses a "single screw rod adjustment double protection leg". Along with the improvement of the space utilization requirement of the user, the user provides the requirements of more compact structure, smaller overall dimension and the like for the lifting working platform, and the traditional folding supporting leg has the conditions of overlarge volume, difficult storage, complex operation and the like. Meanwhile, the supporting legs are used as key parts of the lifting working platform, and often, electric elements for detecting whether the supporting legs are effectively supported need to be arranged on the supporting legs, and the reliability and the installation positions of the electric elements enable the requirements on the supporting legs to be higher.

Disclosure of Invention

The invention aims to solve the technical problems and provide a folding supporting leg of a lifting working platform, which overcomes the defects of overlarge volume, difficult storage and complex operation of the traditional supporting leg and has the advantages of more compact structure, smaller overall dimension and easy folding.

In order to achieve the above object, the folding leg of the lifting working platform of the invention is characterized by comprising:

the upper end of the fixed seat can be assembled with an upper shaft sleeve which can rotate around a vertical axis, and the lower end of the fixed seat can be assembled with a lower shaft sleeve which can rotate around the vertical axis;

the near end of the supporting leg main body is connected to the upper shaft sleeve through a second transverse pin shaft, and the far end of the supporting leg main body is provided with a reversible nut; the landing leg main body can be overturned and transposed around the second transverse pin shaft between a first storage position and a first support position, the first storage position is a position where the landing leg main body is upright, and the first support position is a position where the landing leg main body deviates from the first storage position and plays a supporting role;

the first support screw is assembled with the nut through threads and can be switched between a second accommodating position and a second support position by turning the nut, the second accommodating position is a position where the first support screw and the supporting leg main body are closed, and the second support position is a position where the first support screw deviates from the second accommodating position and intersects with the supporting leg main body;

the near end of the diagonal draw bar is connected to the lower shaft sleeve through a third transverse pin shaft, the far end of the diagonal draw bar is intersected with the middle part of the landing leg main body, and a common bolt is inserted between the far end and the middle part of the landing leg main body; the second transverse pin shaft, the third transverse pin shaft and the bolt determine a triangle to enable the diagonal draw bar to keep the supporting leg main body at the first supporting position.

This folding landing leg, landing leg main part and diagonal draw bar can rotate round vertical axis to can adjust the support position, reach reasonable support.

When the bolt is detached, the landing leg main body can be overturned to the first accommodating position for transposition, and the diagonal draw bar can be overturned around the third transverse pin shaft and is folded with the landing leg main body; in addition, the first supporting screw rod can also be shifted to the second accommodating position, so that the structure is more compact, the appearance size is smaller, and the folding is easy.

As a preferable technical means: in order to realize uniform stress, the near end of the landing leg main body is provided with a first connecting plate and a second connecting plate which are symmetrical, the first connecting plate and the second connecting plate are respectively positioned at two sides of the upper shaft sleeve, and the second transverse pin shaft is inserted on the first connecting plate, the upper shaft sleeve and the second connecting plate.

As a preferable technical means: in order to make the structure compact and occupy less space when folded, the far end of the leg body is provided with a third connecting plate and a fourth connecting plate which are symmetrical, and the nut is positioned between the third connecting plate and the fourth connecting plate; and the nut is assembled on the third connecting plate and the fourth connecting plate through a fourth transverse pin shaft.

As a preferable technical means: in order to facilitate folding and unfolding operations, a limiting pin is arranged on the nut, a limiting guide groove is formed in the far end of the supporting leg main body, the limiting pin is located in the limiting guide groove to limit the turning angle of the nut, the limiting pin is located at one end of the limiting guide groove, the first supporting screw is located at the second storage position, and the limiting pin is located at the other end of the limiting guide groove, the first supporting screw is located at the second supporting position. Therefore, when in operation, the first support screw rod can be turned to a required position only by turning over the first support screw rod.

As a preferable technical means: the diagonal draw bar comprises a first bar and a second bar which are symmetrical, the near ends of the first bar and the second bar are respectively positioned at two sides of the lower shaft sleeve, and the third transverse pin shaft is inserted at the near end of the first bar, the near end of the lower shaft sleeve and the near end of the second bar; the far ends of the first rod and the second rod are respectively positioned at two sides of the supporting leg main body and are connected by a connecting plate positioned at the upper side of the supporting leg main body, and the bolt is inserted at the far end of the first rod, the middle part of the supporting leg main body and the far end of the second rod; when the supporting leg main body is located at the first accommodating position, the supporting leg main body and the fixing seat are located between the first rod and the second rod. The structure in the folded state is more compact.

As a preferable technical means: in order to facilitate installation, the fixed seat is rotatably assembled on the wall plate through the first transverse pin shaft.

As a preferable technical means: the wallboard is provided with a guide block for supporting the upper shaft sleeve, and the guide block is used for supporting the upper shaft sleeve when the supporting leg main body plays a supporting role.

As a preferable technical means: a limiting plate is mounted on the guide block, a limiting block is mounted on the upper shaft sleeve, and the limiting block and the limiting plate are matched to limit the rotation angle of the upper shaft sleeve.

As a preferable technical means: the folding leg of the lifting working platform is provided with a travel switch, and the travel switch is triggered when the upper shaft sleeve leans against the guide block.

And a second support screw is vertically assembled on the fixed seat.

The near end of the landing leg main body is connected to an upper shaft sleeve on a fixed seat through a second transverse pin shaft, the near end of a diagonal draw bar is connected to a lower shaft sleeve through a third transverse pin shaft, the far end of the diagonal draw bar is connected with the middle of the landing leg main body through a bolt, and the second transverse pin shaft, the third transverse pin shaft and the bolt determine a triangle to enable the diagonal draw bar to keep the landing leg main body at a first supporting position; also, the first support screw is shiftable between the second storage position and the second support position by screw-nut fitting. Therefore, the landing leg main body and the diagonal draw bar can rotate around the vertical axis, so that the supporting position can be adjusted, and reasonable support is achieved. When the bolt is detached, the landing leg main body can be overturned to the first accommodating position for transposition, and the diagonal draw bar can be overturned around the third transverse pin shaft and is folded with the landing leg main body; in addition, the first supporting screw rod can also be shifted to the second accommodating position, so that the structure is more compact, the appearance size is smaller, and the folding is easy.

Drawings

FIG. 1 is an isometric view of a folding leg of the lift platform of the present invention;

FIG. 2 is an isometric view of the folding leg of FIG. 1 from another perspective;

FIG. 3 is a side elevational view of the folding leg of FIGS. 1-2;

FIG. 4 is a top view of FIG. 3;

FIG. 5 is a sectional view taken along line A-A of FIG. 4;

FIG. 6 is a schematic view of the leg body and diagonal member being rotatable about a vertical axis to adjust the support position;

FIG. 7 is a schematic view of the folding leg of FIGS. 1-6 in a folded state;

FIG. 8 is an exploded view of the folding leg of FIGS. 1-6;

FIG. 9 is a schematic view of the folding leg of FIGS. 1-6 mounted on a lift platform and in a supporting position;

FIG. 10 is a schematic view of the folding leg of FIG. 9 folded for storage;

the reference numbers in the figures illustrate:

100 folding legs; 200 lifting the working platform;

the structure comprises a 110 fixed seat, a 111 first transverse pin shaft, a 112 upper shaft sleeve, a 113 lower shaft sleeve, a 114 limit block, a 115 second support screw and a 116 vertical axis;

120, a leg body, 121, a second transverse pin shaft, 122 nuts, 123, a first connecting plate, 124, a second connecting plate, 125, a third connecting plate, 126, a fourth connecting plate, 127, a fourth transverse pin shaft, 128, a limiting pin and 129, limiting guide grooves;

130 a first support screw;

140 diagonal draw bars, 141 third transverse pin shafts, 142 bolts, 143 first bars, 144 second bars and 145 connecting plates;

150 wall plates, 151 guide blocks and 152 limit plates;

160 travel switches.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terms "comprises" and "comprising," and any variations thereof, in the description and claims of this invention are intended to cover a non-exclusive inclusion, such that a method or article of manufacture that comprises a list of features does not have to be limited to those features expressly listed, but may include other features not expressly listed that may be included in the method or article of manufacture.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the technical features defined by the terms "first", "second", etc. have sequential concepts, only in order to clearly describe the defined technical features, so that the defined technical features can be clearly distinguished from other technical features, and do not represent such naming in actual practice, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the "near end" and "far end" refer to that when the lifting operation platform is used as a muscle reference and the folding leg is in a supporting state, the end of the corresponding component close to the lifting operation platform is a near end, and the end far away from the lifting operation platform is a far end.

In the description of the invention, vertical is the direction in which the device is intended to be used, i.e. vertical, and transverse is the direction perpendicular to vertical.

The present invention will be described in detail with reference to specific examples.

As shown in fig. 1 to 8, the foldable leg 100 of the lifting work platform includes a fixing base 110, a leg body 120, a first support screw 130, a diagonal draw bar 140, a wall plate 150, a second support screw 115, and a travel switch 160.

The fixing base 110 is rotatably assembled on the wall panel 150 through a first transverse pin 111, and the fixing base 150 can drive the leg main body 120 and the diagonal draw bar 140 to rotate around the first transverse pin 111 to trigger to form a switch. The upper end of the fixed seat 110 is provided with an upper shaft sleeve 112 capable of rotating around a vertical axis 116, and the lower end of the fixed seat 110 is provided with a lower shaft sleeve 113 capable of rotating around the vertical axis 116. The fixed seat 110 is vertically provided with a second support screw 115. The second support screw 115 is preferably engaged with the fixing base 110 by means of trapezoidal threads.

The wall panel 150 is adapted to be secured (e.g., welded) to the work platform 200. A guide block 151 for supporting the upper bushing is installed on the wall plate 150. A limiting plate 152 is arranged on the guide block 151, a limiting block 114 is arranged on the upper shaft sleeve, and the limiting block and the limiting plate are matched to limit the rotation angle of the upper shaft sleeve, so that the rotation angles of the landing leg main body and the diagonal draw bar are limited.

The landing leg main body 120 is rod-shaped, a first connecting plate 123 and a second connecting plate 124 which are symmetrical are arranged at the proximal end of the landing leg main body 120, the first connecting plate and the second connecting plate are respectively positioned at two sides of the upper shaft sleeve 112, and the second transverse pin shaft 121 is inserted into the first connecting plate, the upper shaft sleeve and the second connecting plate. The leg body can be flipped about the second transverse pin 121 between a first storage position, in which the leg body is upright as shown in fig. 7 and 9, and a first support position, in which the leg body is supported off the first storage position as shown in fig. 1-3 and 10.

The distal end of the leg body 120 is provided with a third connecting plate 125 and a fourth connecting plate 126 which are symmetrical, a reversible nut 122 is assembled between the third connecting plate and the fourth connecting plate, and the nut 122 is assembled on the third connecting plate and the fourth connecting plate through a fourth transverse pin 127. The far ends of the third connecting plate and the fourth connecting plate are provided with limiting guide grooves 129, the nut 122 is provided with a limiting pin 128, and the limiting pin 128 is positioned in the limiting guide grooves 129 to limit the turning angle of the nut. As shown in fig. 7 and 10, when the position-limiting pin 128 is located at one end of the position-limiting guide groove 129, the first support screw 130 is located at the second receiving position, and as shown in fig. 1-3 and 9, when the position-limiting pin is located at the other end of the position-limiting guide groove 129, the first support screw is located at the second supporting position, and at this time, the end of the position-limiting guide groove has a supporting force effect.

The first support screw is assembled with the nut through threads and can be switched between a second storage position and a second support position through turning over of the nut, the second storage position is a position where the first support screw and the leg body are folded together as shown in fig. 7 and 9, and the second support position is a position where the first support screw deviates from the second storage position and intersects with the leg body as shown in fig. 1-3 and 9. The first support screw is preferably engaged with the nut by means of trapezoidal threads.

The diagonal draw bar 140 includes two symmetrical first bars 143 and second bars 144, proximal ends of the first bars and the second bars are respectively located at two sides of the lower shaft sleeve 113, and a third transverse pin 141 is inserted through the proximal end of the first bar, the lower shaft sleeve and the proximal end of the second bar, thereby connecting the proximal end of the diagonal draw bar to the lower shaft sleeve through the third transverse pin. The far ends of the first rod 143 and the second rod 144 are respectively positioned at two sides of the leg body and connected by a connecting plate 145 positioned at the upper side of the leg body, and the bolt 142 is inserted at the far end of the first rod, the middle part of the leg body and the far end of the second rod; therefore, the far end of the diagonal draw bar is intersected with the middle part of the landing leg main body, and the far end is connected with the middle part of the landing leg main body. In view of this assembly, the second transverse pin 121, the third transverse pin 141 and the pin 142 define a triangle for the diagonal draw bar to hold the leg body in the first support position. When the leg main body 120 is located at the first storage position as shown in fig. 7 and 10, the leg main body 120 and the fixing base 110 are located between the first rod 143 and the second rod 144.

Furthermore, a travel switch 160 is assigned to the folding leg of the lifting platform, the travel switch 160 preferably being arranged at the end of the fixing base, the travel switch being triggered by the end of the fixing base when the upper shaft sleeve rests on the guide block.

The folding leg, the leg body 120 and the diagonal member 140 of the above structure can rotate around the vertical axis 116 (i.e., the fixed seat), so that the positions can be adjusted as shown in fig. 4 and 6. When the bolt 142 is detached, the landing leg main body 120 can be turned over and transposed to the first storage position, and the diagonal draw bar 140 can be turned over around the third transverse pin shaft and is folded together with the landing leg main body; the first support screw is automatically turned and received between the third connecting plate 125 and the fourth connecting plate 126.

The folding leg 100 shown in fig. 1-8 is welded on the bottom frame of the lifting work platform 200 through the wall plate 150 to realize the installation of the folding leg on the lifting cable platform, as shown in fig. 9-10, the four corners of the bottom frame of the lifting work platform are respectively provided with one folding leg shown in fig. 1-8. FIG. 9 is a schematic view of the folding legs mounted to the work platform and in a supported position; fig. 10 is a schematic view showing the foldable leg of fig. 9 folded and stored.

Spherical structures are arranged at the bottoms of the first supporting screw rod and the second supporting screw rod, and are matched with spherical grooves in the flanges through the spherical structures, so that the first supporting screw rod and the second supporting screw rod can rotate by means of threads to realize supporting when the flanges are in contact with the ground.

As shown in fig. 1-3 and 9, when the leg support is folded, the first support screw 130 is forced to pivot the leg body 120 upward around the second transverse pin until the upper bushing 112 abuts against the guide block 151, and the end of the leg body 120 triggers the travel switch 160 to transmit a signal.

When the support leg is not used, the support leg can be folded and folded as shown in figures 7 and 10, the nut and the first support screw rod are collected in the support leg main body under the action of gravity, and the support leg main body is partially structurally located in a neutral position of the diagonal draw bar, so that the storage space is reduced.

Claims

1. Folding landing leg of lift work platform, characterized by includes:

the fixing seat (110) can rotate around a first transverse pin shaft (111), the upper end of the fixing seat is provided with an upper shaft sleeve (112) which can rotate around a vertical axis (116), and the lower end of the fixing seat is provided with a lower shaft sleeve (113) which can rotate around the vertical axis;

a leg body (120) whose proximal end is connected to the upper shaft sleeve by a second transverse pin (121) and whose distal end is fitted with a reversible nut (122); the landing leg main body can be overturned and transposed around the second transverse pin shaft between a first storage position and a first support position, the first storage position is a position where the landing leg main body is upright, and the first support position is a position where the landing leg main body deviates from the first storage position and plays a supporting role;

a first support screw (130) which is assembled with the nut through threads and can be switched between a second receiving position and a second support position by means of turning of the nut, wherein the second receiving position is a position where the first support screw and the leg main body are closed, and the second support position is a position where the first support screw deviates from the second receiving position and intersects with the leg main body;

the near end of the diagonal draw bar (140) is connected to the lower shaft sleeve through a third transverse pin shaft (141), the far end of the diagonal draw bar intersects with the middle part of the landing leg main body, and a common bolt (142) is inserted between the far end and the middle part of the landing leg main body; the second transverse pin shaft (121), the third transverse pin shaft (141) and the bolt (142) determine a triangle to enable the diagonal draw bar to keep the support leg main body at the first supporting position;

be equipped with spacer pin (128) on nut (122), spacing guide slot (129) are established to the distal end of landing leg main part, the spacer pin is located in order to restrict in the spacing guide slot the rotation angle of nut, the spacer pin is located during the one end of spacing guide slot first support screw is located the second is accomodate the position, the spacer pin is located during the other end of spacing guide slot first support screw is located the second support position.

2. The folding leg of an elevating work platform as set forth in claim 1, wherein: the near end of the supporting leg main body (120) is provided with a first connecting plate (123) and a second connecting plate (124) which are symmetrical, the first connecting plate and the second connecting plate are respectively positioned on two sides of the upper shaft sleeve, and the second transverse pin shaft is inserted on the first connecting plate, the upper shaft sleeve and the second connecting plate.

3. The folding leg of an elevating work platform as set forth in claim 1, wherein: the far end of the support leg main body is provided with a third connecting plate (125) and a fourth connecting plate (126) which are symmetrical, and the nut is positioned between the third connecting plate and the fourth connecting plate; and the nut is assembled on the third connecting plate and the fourth connecting plate through a fourth transverse pin shaft.

4. The folding leg of an elevating work platform as set forth in claim 1, wherein: the diagonal draw bar (140) comprises a first bar (143) and a second bar (144) which are symmetrical, the proximal ends of the first bar and the second bar are respectively positioned at two sides of the lower shaft sleeve, and the third transverse pin shaft is inserted into the proximal end of the first bar, the proximal end of the lower shaft sleeve and the proximal end of the second bar; the far ends of the first rod and the second rod are respectively positioned at two sides of the supporting leg main body and are connected by a connecting plate positioned at the upper side of the supporting leg main body, and the bolt is inserted in the far end of the first rod, the middle part of the supporting leg main body and the far end of the second rod; when the supporting leg main body is located at the first storage position, the supporting leg main body and the fixing seat are located between the first rod and the second rod.

5. The folding leg of an elevating work platform as set forth in claim 1, wherein: the fixed seat (110) is rotatably assembled on the wall board (150) through the first transverse pin shaft (111).

6. The folding leg of an elevating work platform as set forth in claim 5, wherein: and a guide block (151) for supporting the upper shaft sleeve is arranged on the wall plate (150).

7. The folding leg of an elevated work platform of claim 6, wherein: a limiting plate (152) is arranged on the guide block (151), a limiting block (114) is arranged on the upper shaft sleeve, and the limiting block and the limiting plate are matched to limit the rotation angle of the upper shaft sleeve.

8. The folding leg of an elevated work platform of claim 6, wherein: a travel switch (160) is provided for the folding leg of the lifting work platform, said travel switch being activated when said upper sleeve rests on said guide block.

9. The folding leg of an elevating work platform as set forth in claim 1, wherein: and a second support screw (115) is vertically assembled on the fixed seat.