Self-locking portable skirting pulley and ladder

Abstract

The utility model discloses a self-locking portable skirting pulley and a ladder. The self-locking portable skirting pulley comprises a skirting assembly, a limiting block and a pulley assembly. The skirting assembly comprises fixing foot pieces and rubber foot pads, the fixing foot pieces are fixedly installed on the two sides of the bottom of the ladder, and the rubber foot pads are fixedly connected to the bottoms of the fixing foot pieces; the limiting block is fixedly mounted on the rear side of the bottom of the ladder, and the limiting block is provided with an upper limiting part and a lower limiting part; the pulley assembly comprises a base, a fixed seat, a first connecting rod and a second connecting rod which are sequentially connected end to end; the fixed seat is detachably and fixedly connected to the fixed foot piece; two ends of the base, the first connecting rod and the second connecting rod are rotationally connected; universal wheels are fixedly connected to the bottom of the base; a synchronous rod is fixedly connected between the two second connecting rods; the self-locking portable skirting pulley has a using state and a folding state. The self-locking portable skirting pulley can realize quick movement of a ladder, and is easy to disassemble and assemble.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial ladders, in particular to a self-locking portable kick-up pulley and a ladder. Background Art

[0002] When people use ladders for work, due to the nature of the work, the ladders may need to be moved frequently, or the ladders also need to be moved to the storage area after being put away. Because the ladders used at high altitudes are heavy in self-weight and industrial ladders are clumsy to move, how to achieve the quick movement of the ladders has become a key problem to be solved. Summary of the Utility Model

[0003] In view of the deficiencies of the prior art, an object of the utility model is to provide a self-locking portable kick-up pulley and a ladder, which can achieve the quick movement of the ladder and are easy to disassemble and install.

[0004] To achieve the above object, an embodiment of the present application provides a self-locking portable kick-up pulley for detachably installing on a ladder. The self-locking portable kick-up pulley includes:

[0005] A kick-up assembly, including a fixed foot piece and a rubber foot pad. The fixed foot piece is fixedly installed on both sides of the bottom of the ladder, and the rubber foot pad is fixedly connected to the bottom of the fixed foot piece;

[0006] A limit block is fixedly installed at the rear side of the bottom of the ladder. The limit block has an upper limit part and a lower limit part. The upper limit part includes a cushion block, an upper plane and an upper protrusion at the top of the limit block. The upper protrusion is located at one end of the upper plane away from the ladder, and the cushion block is located above the upper plane and close to the ladder. The lower limit part includes a lower plane and a lower protrusion at the bottom of the limit block. The lower protrusion is located at one end of the lower plane away from the ladder;

[0007] A pulley assembly includes a base, a fixed seat, a first connecting rod and a second connecting rod connected end to end in sequence. The fixed seat is detachably and fixedly connected to the fixed foot piece. Both ends of the base, the first connecting rod and the second connecting rod are rotatably connected. A universal wheel is fixedly connected to the bottom of the base. A synchronizing rod is fixedly connected between the two second connecting rods. The self-locking portable kick-up pulley has a use state and a retracted state. When the self-locking portable kick-up pulley is in the use state, the synchronizing rod is located below the limit block and is limited by the lower limit part. The synchronizing rod is in contact with the lower plane and abuts against the lower protrusion. The universal wheel is in contact with the ground, and the rubber foot pad is separated from the ground. When the self-locking portable kick-up pulley is in the retracted state, the synchronizing rod is located above the limit block and is limited by the upper limit part. The synchronizing rod is in contact with the upper plane and is abutted between the cushion block and the upper protrusion. The universal wheel is separated from the ground, and the rubber foot pad is in contact with the ground.

[0008] As a preferred embodiment, the height of the limiting block is higher than the height of the fixed foot piece.

[0009] As a preferred embodiment, the thickness of the rubber foot pad gradually increases from the side away from the pulley assembly to the side close to the pulley assembly.

[0010] As a preferred embodiment, define the end of the first connecting rod away from the second connecting rod as A, the end of the second connecting rod away from the first connecting rod as C, and the connection point of the first connecting rod and the second connecting rod as D; when the self-locking portable kicking pulley is in the use state, D is located below the line AC.

[0011] As a preferred embodiment, when the self-locking portable kicking pulley is in the use state, the angle between the straight line AD and the straight line CD is greater than or equal to 170°.

[0012] As a preferred embodiment, when the self-locking portable kicking pulley is in the retracted state, D is located above the line AC, and the angle between the straight line AD and the straight line CD is the smallest.

[0013] As a preferred embodiment, define the connection point of the base and the fixed seat as B. When the self-locking portable kicking pulley is in the retracted state, the angle between the straight line AB and the ground is 75°, and the angle between the straight line AD and the straight line CD is 45°.

[0014] As a preferred embodiment, the fixed foot piece is provided with a slot for installing the fixed seat, and the fixed foot piece and the fixed seat are fixedly connected by a connecting pin and a B-shaped pin; a reinforcing backing plate is fixedly arranged between the fixed foot piece and the rubber foot pad.

[0015] As a preferred embodiment, the synchronizing rod has opposite first and second ends; at the first end of the synchronizing rod, the synchronizing rod is fixedly connected with a synchronizing plate, the synchronizing plate is fixedly connected with the second connecting rod, and the base, the fixed seat, the first connecting rod and the second connecting rod are respectively rotatably connected by rivets; the structure of the second end of the synchronizing rod is symmetrically arranged with the structure of the first end.

[0016] This application also provides a ladder, including: a ladder and the self-locking portable kicking pulley as described in any one of the above embodiments, and the self-locking portable kicking pulley is detachably installed on the ladder. Beneficial effects

[0017] The self-locking portable kick-up pulley provided by the present utility model is provided with a kick-up component, a limiting block and a pulley component. The kick-up component is fixed to the ladder through a fixed foot piece, and the pulley component is detachably and fixedly connected to the fixed foot piece through a fixed seat, so as to realize the disassembly and installation of the self-locking portable kick-up pulley, making the kick-up pulley easy to disassemble and install; a universal wheel is fixedly connected to the bottom of the base of the pulley component, which can realize the quick movement of the ladder, enabling the ladder to have a wide movement range and be movable 360 degrees in all directions; the pulley component is provided with a four-bar linkage structure composed of a base, a fixed seat, a first connecting rod and a second connecting rod, which can be self-locked during use, safe and convenient. The opening and closing of the synchronous rod can be controlled by operating it with a single foot, and it has a beautiful appearance. The limiting block can limit the position of the synchronous rod, and the synchronous rod can change its position by the single-foot operation of the user. When the synchronous rod is limited by the upper limiting part, the self-locking portable kick-up pulley is in a retracted state; when the synchronous rod is limited by the lower limiting part, the self-locking portable kick-up pulley is in a use state.

[0018] Specific embodiments of the present utility model are disclosed in detail with reference to the following description and the accompanying drawings, indicating the ways in which the principles of the present utility model can be employed. It should be understood that the scope of the embodiments of the present utility model is not thereby limited.

[0019] Features described and / or illustrated for one embodiment can be used in the same or similar way in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0020] It should be emphasized that the term "comprising / including" when used herein refers to the presence of features, wholes, steps or components, but does not exclude the presence or addition of one or more other features, wholes, steps or components. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0022] Figure 1 It is a schematic three-dimensional structure diagram of a ladder provided in this embodiment, and its self-locking portable kick-up pulley is in a use state;

[0023] Figure 2 It is a schematic three-dimensional structure diagram of another ladder provided in this embodiment, and its self-locking portable kick-up pulley is in a retracted state;

[0024] Figure 3Schematic diagram of the structure of a limiting block provided in this embodiment;

[0025] Figure 4 Schematic diagram of the structure of a self-locking portable kick pulley provided in this embodiment;

[0026] Figure 5 is Figure 4 exploded structure diagram of;

[0027] Figure 6 is Figure 5 structure diagram of another perspective of;

[0028] Figure 7 Exploded structure diagram of a pulley assembly provided in this embodiment;

[0029] Figure 8 Side view of the self-locking portable kick pulley in the use state;

[0030] Figure 9 is Figure 8 schematic diagram of the four-bar linkage structure in;

[0031] Figure 10 Side view of the self-locking portable kick pulley in the retracted state;

[0032] Figure 11 is Figure 10 schematic diagram of the four-bar linkage structure in.

[0033] Explanation of reference numerals:

[0034] 1. Kick assembly; 11. Fixed foot piece; 12. Rubber foot pad; 13. Reinforcing backing plate; 14. Self-tapping screw; 15. Second gasket;

[0035] 2. Limiting block; 21. Upper limiting part; 211. Spacer block; 212. Upper plane; 213. Upper protrusion; 22. Lower limiting part; 221. Lower plane; 222. Lower protrusion; 23. First gasket; 24. Fixed rivet;

[0036] 3. Pulley assembly; 31. Base; 32. Fixed seat; 33. First connecting rod; 34. Second connecting rod; 35. Rivet; 36. Universal wheel; 37. Synchronizing rod; 38. Synchronizing plate; 39. Self-tapping screw; 310. Connecting pin; 311. B-type pin; 312. Spacer;

[0037] 4. Ladder;

[0038] 5. Ground. Detailed implementation manners

[0039] To enable those skilled in the art to better understand the technical solutions in the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0040] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there may also be another element in the middle. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be another element in the middle at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used herein in the specification of the present utility model are only for the purpose of describing specific implementation manners and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0042] Please refer to Figures 1 to 11 The embodiments of the present application provide a self-locking portable kick-up pulley. The self-locking portable kick-up pulley is used for detachably mounting on a ladder 4, so as to assist the ladder 4 to move quickly. The self-locking portable kick-up pulley includes: a kick-up assembly 1, a limit block 2 and a pulley assembly 3.

[0043] As Figure 4 shown, the kick-up assembly 1 includes a fixed foot member 11 and a rubber foot pad 12. The numbers of the fixed foot member 11 and the rubber foot pad 12 are two respectively. The two fixed foot members 11 are respectively fixedly mounted on both sides of the bottom of the ladder 4. The rubber foot pad 12 is fixedly connected to the bottom of the fixed foot member 11.

[0044] As Figure 7 shown, the pulley assembly 3 includes a base 31, a fixed seat 32, a first connecting rod 33 and a second connecting rod 34 that are connected end to end in sequence. The fixed seat 32 is detachably and fixedly connected to the fixed foot member 11. Both ends of the base 31, the first connecting rod 33 and the second connecting rod 34 are rotatably connected. A universal wheel 36 is fixedly connected to the bottom of the base 31. A synchronizing rod 37 is fixedly connected between the two second connecting rods 34.

[0045] The self-locking portable kick pulley has a use state and a retracted state. The limit block 2 is fixedly installed at the rear side of the bottom of the ladder 4. The limit block 2 has an upper limit portion 21 and a lower limit portion 22. As Figure 3 shown, the limit block 2 can be roughly formed by splicing two hollow rectangular parallelepipeds up and down. While ensuring its strength, its weight can be appropriately reduced. The upper limit portion 21 can include a cushion block 211, an upper plane 212 and an upper protrusion 213 located at the top of the limit block 2. The upper protrusion 213 is located at one end of the upper plane 212 away from the ladder 4. The cushion block 211 is located above the upper plane 212 and close to the ladder. Thus, the cushion block 211 and the upper protrusion 213 can limit the synchronous rod 37 in the retracted state. The cushion block 211 and the upper protrusion 213 clamp the synchronous rod 37, which can prevent the synchronous rod 37 from moving back and forth. The lower limit portion 22 can include a lower plane 221 located at the bottom of the limit block 2 and a lower protrusion 222 at one end away from the ladder 4, so as to limit the synchronous rod 37 in the use state.

[0046] When the self-locking portable kick pulley is in the use state, the synchronous rod 37 is located below the limit block 2 and is limited by the lower limit portion 22. The synchronous rod 37 is in contact with the lower plane 221 and abuts against the lower protrusion 222 (thus, the hidden danger that the synchronous rod 37 pops up upward due to the uneven ground 5 can be eliminated, as detailed in the following analysis). The universal wheel 36 is in contact with the ground 5, and the rubber foot pad 12 is separated from the ground 5. Thus, the universal wheel 36 can quickly move the ladder 4 to the required position. When the self-locking portable kick pulley is in the retracted state, the synchronous rod 37 is located above the limit block 2 and is limited by the upper limit portion 21. The synchronous rod 37 is in contact with the upper plane 212 and is abutted between the cushion block 211 and the upper protrusion 213 (thus, in order to make the synchronous rod 37 escape from the state of being limited by the upper limit portion 21, a force more than twice the self-weight of the pulley assembly 3 needs to be applied to the synchronous rod 37, as detailed in the following analysis). The universal wheel 36 is separated from the ground 5, and the rubber foot pad 12 is in contact with the ground 5. Thus, the ladder 4 can be fixedly contacted with the ground 5. The cushion block 211 can prevent the synchronous rod from moving towards the direction close to the ladder, avoid the angle between the first link 33 and the second link 34 from being too small, and avoid the fixed seat 32 and the first link 33 being on the same straight line, thus avoiding the four-link structure from jamming.

[0047] The self-locking portable kick-up pulley provided in this embodiment is provided with a kick-up component 1, a limiting block 2, and a pulley component 3. The kick-up component 1 is fixed to the ladder 4 through a fixed foot member 11, and the pulley component 3 is detachably and fixedly connected to the fixed foot member 11 through a fixed seat 32, thereby realizing the disassembly and installation of the self-locking portable kick-up pulley, making the kick-up pulley easy to disassemble and install; a universal wheel 36 is fixedly connected to the bottom of the base 31 of the pulley component 3, which can realize the quick movement of the ladder 4, so that the movement range of the ladder 4 is wide and it can move 360 degrees in all directions; the pulley component 3 is provided with a four-bar linkage structure composed of a base 31, a fixed seat 32, a first link 33, and a second link 34, which can be self-locked during use, safe and convenient, and the opening and closing can be controlled by operating the synchronization rod 37 with a single foot, and the appearance is beautiful. The limiting block 2 can limit the position of the synchronization rod 37, and the synchronization rod 37 can change its position through the single-foot operation of the user. When the synchronization rod 37 is limited by the upper limiting portion 21, the self-locking portable kick-up pulley is in the retracted state; when the synchronization rod 37 is limited by the lower limiting portion 22, the self-locking portable kick-up pulley is in the use state.

[0048] In this embodiment, the design of the four-bar linkage structure (base 31, fixed seat 32, first link 33, and second link 34) plays a decisive role in realizing the self-locking function. The base 31, fixed seat 32, first link 33, and second link 34 are respectively rotatably connected through rivets 35. One end of the second link 34 close to the first link 33 is provided with a part located outside the first link 33, which can assist in realizing the self-locking function.

[0049] As Figures 8 to 11 shown, define the end of the first link 33 far from the second link 34 as A, the end of the second link 34 far from the first link 33 as C, the connection point of the first link 33 and the second link 34 as D, and the connection point of the base 31 and the fixed seat 32 as B.

[0050] As Figure 8 and Figure 9 shown, when the self-locking portable kick-up pulley is in the use state, D is located below the AC connection line, and the angle between the straight line AD and the straight line CD is greater than or equal to 170°. When a force is applied to point C, it will move in the direction indicated by F1, and point D will move in the direction indicated by F2 due to structural limitations. Since the angle between the AD and DC segments is not less than 170 degrees, self-locking can be completed during use. As Figure 8 shown, the limiting block 2 (the lower limiting portion 22 thereof) will eliminate the hidden danger that the synchronization rod 37 pops up upward due to the uneven ground 5, making its structure safer.

[0051] As Figure 10 and Figure 11As shown, when the self-locking portable kick pulley is in the retracted state, D is above the line connecting AC, and the angle between the straight line AD and the straight line CD is the smallest. Preferably, the angle between the straight line AB and the ground 5 is 75°, and the angle between the straight line AD and the straight line CD is 45°.

[0052] In the retracted state, due to its own weight, the pulley assembly 3 will cause the synchronizing rod 37 to droop downward. And for the synchronizing rod 37 (referring to point D in Figure 11 ), due to the four-bar linkage structure, it will have forces in the directions of F3 and F4. It can be obtained that the final resultant force direction is the direction indicated by F5. And the limiting block 2 will make the force in this direction reach a certain magnitude (more than twice its own weight) before it can be disengaged. That is, in order to disengage the synchronizing rod 37 from the state of being limited by the upper limiting portion 21, a force more than twice the weight of the pulley assembly 3 needs to be applied to the synchronizing rod 37. When trying to disengage the synchronizing rod 37, the external force applied by a person acts on the synchronizing rod 37, increasing the force in the F3 direction while keeping the force in the F4 direction unchanged. This will make the included angle between the resultant force direction represented by F5 and the F3 direction smaller, making it easier for the synchronizing rod 37 to be disengaged.

[0053] As Figure 1 and Figure 2 shown, the height of the limiting block 2 is higher than the height of the fixed foot member 11. The position of the fixed foot member 11 determines the position of the fixed seat 32 in the four-bar linkage structure. Such a setting can ensure that the limiting block 2 can achieve the effect of upper and lower limiting.

[0054] As Figure 5 and Figure 6 shown, the thickness of the rubber foot pad 12 gradually increases from the front side to the rear side. Thus, in the use state, the rubber foot pad 12 will not hinder the movement of the ladder 4, and in the retracted state, the rubber foot pad 12 stably supports the ladder 4 on the ground 5. Here, the front side refers to the side away from the pulley assembly 3 in the walking direction of the ladder 4, and the rear side refers to the side close to the pulley assembly 3 in the walking direction of the ladder 4. Reference can be made to the arrow indications in Figure 5 and Figure 6 .

[0055] In this embodiment, the fixed foot member 11 is provided with a slot for installing the fixed seat 32. The fixed foot member 11 and the fixed seat 32 are fixedly connected by a connecting pin 310 and a B-type pin 311. A reinforcing backing plate 13 is fixedly arranged between the fixed foot member 11 and the rubber foot pad 12.

[0056] As Figure 7As shown, both ends of the synchronization rod 37 are fixedly connected with synchronization plates 38. The synchronization rod 37 has opposite first and second ends. At the first end of the synchronization rod 37, the synchronization rod 37 is fixedly connected with a synchronization plate 38, and the synchronization plate 38 is fixedly connected with the second connecting rod 34. The base 31, the fixed seat 32, the first connecting rod 33, and the second connecting rod 34 are respectively rotationally connected by rivets 35. The structure of the second end of the synchronization rod 3 is symmetrically arranged with that of the first end.

[0057] When assembling the pulley assembly 3, first fix the universal wheel 36 on the base 31 with the first rivet, and fix the synchronization plate 38 on the synchronization rod 37 with the self-tapping screw 39. Then assemble the base 31, the fixed seat 32, the first connecting rod 33, the second connecting rod 34, and the synchronization plate 38. A spacer 312 needs to be added to the base 31 before installation. Connect the first connecting rod 33, the second connecting rod 34, and the fixed seat 32 end to end as Figure 7 shown and connect them to the synchronization plate 38 with rivets 35. Since the required parts for the symmetric parts are the same, the other side can be installed mirror-symmetrically.

[0058] When installing the limit block 2, fix the limit block 2, the first gasket 23, and the fixing rivet 24 on the pillar of the ladder 4 as Figure 5 and Figure 6 shown.

[0059] When installing the kick plate assembly 1, install the reinforcing backing plate 13 and the rubber foot pad 12 on the fixed foot part 11 with self-tapping screws 14 sleeved with the second gasket 15. The second gasket 15 is larger than the first gasket 23.

[0060] When installing the pulley assembly 3 on the ladder 4, quickly insert the fixed seat 32 in the pulley assembly 3 onto the card slot on the fixed foot part 11 in the kick plate assembly 1, insert the connecting pin 310 into the reserved installation hole, and then insert the B-type pin 311 into the small hole at the end of the connecting pin 310 to lock it, thus completing the installation. When it is necessary to disassemble the pulley assembly 3 from the ladder 4, take out the B-type pin 311 and then take out the connecting pin 310 to complete the disassembly.

[0061] This self-locking portable kick plate pulley makes up for the deficiency of the clumsy movement of industrial ladders. The pulley assembly 3 can be quickly disassembled and installed, and is convenient and fast to use. The kick plate pulley can be self-locked during use and will not retract, and can be self-locked when retracted to prevent falling.

[0062] Based on the same concept, an embodiment of the present invention also provides a ladder as described in the following embodiment. Since the principle of solving problems and the achievable technical effects of this ladder are similar to those of the above self-locking portable kick plate pulley, the implementation of this ladder can refer to the implementation of the above self-locking portable kick plate pulley, and the repeated parts will not be described again.

[0063] AsFigure 1 and Figure 2 As shown in Figure 1 and Figure 2 , an embodiment of the present utility model further provides a ladder tool, including: a ladder 4 and the self-locking portable kick pulley as described in any one of the above embodiments, and the self-locking portable kick pulley is detachably mounted on the ladder 4.

[0064] It should be noted that other parts of the ladder tool provided in this embodiment (such as the climbing part, the top part, etc.) can be selected from any suitable existing structures. For the sake of clearly and briefly describing the technical solution provided in this embodiment, the above parts will not be elaborated herein, and the accompanying drawings of the specification have also been correspondingly simplified. However, it should be understood that the scope of this embodiment is not limited thereby.

[0065] It should be noted that in the description of this specification, the terms "first", "second", etc. are only used for descriptive purposes and to distinguish similar objects, and there is no sequence between them, nor can they be understood as indicating or implying relative importance. In addition, in the description of this specification, unless otherwise stated, the meaning of "a plurality" is two or more.

[0066] Any numerical value cited herein includes all values from the lower value to the upper value increasing by one unit between the lower limit value and the upper limit value, as long as there is at least a two-unit interval between any lower value and any higher value. For example, if the value of the number of components or process variables (such as temperature, pressure, time, etc.) is stated as from 1 to 90, preferably from 20 to 80, more preferably from 30 to 70, then it is intended to illustrate that values such as 15 to 85, 22 to 68, 43 to 51, 30 to 32, etc. are also clearly listed in this specification. For values less than 1, a unit is appropriately considered to be 0.0001, 0.001, 0.01, 0.1. These are merely examples of what is intended to be clearly expressed, and it can be considered that all possible combinations of the numerical values listed between the lowest value and the highest value are clearly set forth in this specification in a similar manner.

[0067] Unless otherwise stated, all ranges include the endpoints and all numbers between the endpoints. "About" or "approximately" used in conjunction with a range is applicable to both endpoints of the range. Thus, "about 20 to 30" is intended to cover "about 20 to about 30", including at least the specified endpoints.

[0068] All articles and references disclosed, including patent applications and publications, are incorporated herein by reference for various purposes. The term "consisting essentially of" in describing a combination shall include the identified elements, ingredients, components or steps as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe the combinations of elements, ingredients, components or steps herein also contemplates embodiments consisting essentially of these elements, ingredients, components or steps. By using the term "may" herein, it is intended that any of the attributes described as "may" include are optional.

[0069] A plurality of elements, ingredients, components or steps can be provided by a single integrated element, ingredient, component or step. Alternatively, a single integrated element, ingredient, component or step can be separated into discrete plural elements, ingredients, components or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step does not thereby preclude other elements, ingredients, components or steps.

[0070] It should be understood that the above description is for purposes of illustration and not limitation. Many embodiments and many applications other than the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present teachings should not be determined with reference to the above description, but should be determined with reference to the appended claims and the full scope of equivalents to which such claims are entitled. For completeness, all articles and references including patent applications and published disclosures are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein from the foregoing claims is not a waiver of that subject matter, nor should it be considered that the inventors did not consider that subject matter to be part of the disclosed utility model subject matter.

Claims

1. A self-locking portable kick pulley, characterized in that: The self-locking portable kick pulley is used to be detachably mounted on a ladder, and the self-locking portable kick pulley comprises: A kicking assembly, comprising a fixed foot piece and a rubber foot pad, wherein the fixed foot piece is fixedly mounted on both sides of the bottom of the ladder, and the rubber foot pad is fixedly connected to the bottom of the fixed foot piece; A limit block is fixedly mounted on the rear side of the bottom of the ladder, and the limit block has an upper limit portion and a lower limit portion; the upper limit portion includes a pad located at the top of the limit block, an upper plane and an upper protrusion, the upper protrusion is located at the end of the upper plane away from the ladder, and the pad is located above the upper plane and is arranged close to the ladder; the lower limit portion includes a lower plane and a lower protrusion located at the bottom of the limit block, and the lower protrusion is located at the end of the lower plane away from the ladder; The pulley assembly comprises a base, a fixed base, a first connecting rod and a second connecting rod which are connected in sequence end to end; the fixed base is detachably fixedly connected to the fixed foot piece, and both ends of the base, the first connecting rod and the second connecting rod are rotatably connected; a universal wheel is fixedly connected to the bottom of the base; a synchronization rod is fixedly connected between the two second connecting rods; the self-locking portable kicking pulley has a use state and a retracted state, and when the self-locking portable kicking pulley is in the use state, the synchronization rod is located below the limit block and is limited by the lower limit part, the synchronization rod contacts the lower plane and abuts against the lower protrusion, the universal wheel contacts the ground, and the rubber foot pad is separated from the ground; when the self-locking portable kicking pulley is in the retracted state, the synchronization rod is located above the limit block and is limited by the upper limit part, the synchronization rod contacts the upper plane and is abutted between the pad and the upper protrusion, the universal wheel is separated from the ground, and the rubber foot pad contacts the ground.

2. The self-locking portable kick pulley according to claim 1, characterized in that: The height of the limiting block is higher than the height of the fixing foot piece.

3. The self-locking portable kick pulley according to claim 1, characterized in that: The thickness of the rubber foot pad gradually increases from a side away from the pulley assembly to a side close to the pulley assembly.

4. The self-locking portable kick pulley according to claim 1, characterized in that: Define that the end of the first connecting rod away from the second connecting rod is A, the end of the second connecting rod away from the first connecting rod is C, and the connection point between the first connecting rod and the second connecting rod is D; when the self-locking portable kick pulley is in the use state, D is located below the AC line.

5. The self-locking portable kick pulley according to claim 4, characterized in that: When the self-locking portable kick pulley is in the use state, the angle between the straight line AD and the straight line CD is greater than or equal to 170°.

6. The self-locking portable kick pulley according to claim 4, characterized in that: When the self-locking portable kick pulley is in the retracted state, D is located above the AC line, and the angle between the straight line AD and the straight line CD is the smallest.

7. The self-locking portable kick pulley according to claim 6, characterized in that: The connection point between the base and the fixing base is defined as B. When the self-locking portable kick pulley is in the retracted state, the angle between the straight line AB and the ground is 75°, and the angle between the straight line AD and the straight line CD is 45°.

8. The self-locking portable kick pulley according to claim 1, characterized in that: The fixed foot piece is provided with a slot for installing the fixed seat, and the fixed foot piece and the fixed seat are fixedly connected by a connecting pin and a B-type pin; a reinforcing pad is fixedly provided between the fixed foot piece and the rubber foot pad.

9. The self-locking portable kick pulley according to claim 1, characterized in that: The synchronization rod has a first end and a second end relative to each other; at the first end of the synchronization rod, the synchronization rod is fixedly connected to a synchronization plate, the synchronization plate and the second connecting rod are fixedly connected, and the base, the fixing seat, the first connecting rod and the second connecting rod are respectively rotatably connected by rivets; the structure of the second end of the synchronization rod is symmetrically arranged with the structure of the first end.

10. A ladder, characterized in that: include: A ladder, and a self-locking portable kick pulley as claimed in any one of claims 1 to 9, wherein the self-locking portable kick pulley is detachably mounted on the ladder.

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