Novel movable telescopic supporting wheel mechanism

Abstract

The utility model belongs to the technical field of supporting wheel mechanisms, and particularly relates to a novel movable telescopic supporting wheel mechanism. The utility model provides a novel movable telescopic supporting wheel mechanism. The device comprises a hydraulic trailer 4-1 and a support 3-1, and is characterized in that a ball socket is arranged at the upper end of an ejector rod 2-7 of the hydraulic trailer 4-1, and a ball 2-6 is arranged in the ball socket; the front end of a support 3-1 is connected with the rear end of the lower portion of the stand column 1-1, a blind hole cylindrical sleeve 3-2 is arranged at the rear end of the support 3-1, a conical surface is arranged in the middle of the interior of the blind hole cylindrical sleeve 3-2 and corresponds to a ball 2-6, and the upper end of the ball 2-6 abuts against the conical surface. An annular groove 2-7-1 is formed in the upper portion of the ejector rod 2-7, a transverse threaded hole is formed in the lower portion of the blind hole cylindrical sleeve 3-2, and the front end of a screw 2-4 is arranged in the annular groove 2-7-1 in a screwing mode through the transverse threaded hole.

Description

Technical Field

[0001] The utility model belongs to the technical field of support wheel mechanisms, and in particular relates to a novel movable and retractable support wheel mechanism. Background Art

[0002] Currently, various mobile single-post lifts on the market utilize various types and structures of mobile support wheel mechanisms, including mechanical and hydraulic, to achieve mobility and support during use. Most utilize fixed, rigid support wheel mechanisms. These mechanisms are constantly under load during the lifting process, resulting in larger support wheels and axles. Lifts employing this type of support wheel structure have a three-point support base, requiring higher base strength. Utility Model Content

[0003] The utility model aims at solving the above problems and provides a novel movable and retractable supporting wheel mechanism.

[0004] To achieve the above object, the present invention adopts the following technical solution. The present invention includes a hydraulic trailer 4-1 and a bracket 3-1, wherein the upper end of the top rod 2-7 of the hydraulic trailer 4-1 is provided with a ball socket, and a ball 2-6 is provided in the ball socket;

[0005] The front end of the bracket 3-1 is connected to the rear end of the lower part of the column 1-1. The rear end of the bracket 3-1 is provided with a blind hole cylindrical sleeve 3-2. The middle part of the blind hole cylindrical sleeve 3-2 is provided with a conical surface corresponding to the sphere 2-6. The upper end of the sphere 2-6 rests on the conical surface.

[0006] An annular groove 2-7-1 is provided on the upper portion of the push rod 2-7, and a transverse threaded hole is provided on the lower portion of the blind hole cylindrical sleeve 3-2. The front end of the screw 2-4 is screwed through the transverse threaded hole and placed in the annular groove 2-7-1;

[0007] The two sides of the hydraulic trailer 4-1 are connected to the rear end of the right-angle connecting rod 4-2. The front end of the right-angle connecting rod 4-2 is connected to the rear end of the column base 4-4. The front lower end of the right-angle connecting rod 4-2 is connected to the rear end of the connecting rod 4-9 through the pin 2-12. The front end of the connecting rod 4-9 is connected to the rear upper end of the wheel frame 4-6 through the connecting shaft 2-19.

[0008] The supporting wheel 4-7 is mounted on the wheel frame 4-6 through the wheel axle 4-5, and the wheel frame 4-6 is mounted on the column base 4-4 through the wheel frame shaft 2-15.

[0009] As a preferred solution, the front lower end of the right-angle connecting rod 4-2 of the present invention is connected to the rear end of the fork joint 4-3 through a pin shaft 2-12, the front end of the fork joint 4-3 is connected to the rear end of the connecting rod 4-9 through a thread, the front end of the connecting rod 4-9 is connected to the rear end of the joint 4-8 through a thread, and the front end of the joint 4-8 is connected to the rear upper end of the wheel frame 4-6 through a connecting shaft 2-19.

[0010] As another preferred solution, the balls 2-6 of the present invention are steel balls.

[0011] As another preferred embodiment, the present invention further includes a mounting seat 5-3, which is arranged at the rear end of the column base 4-4. A step hole is provided in the mounting seat 5-3, and a ground contact rod 5-4 is provided in the step hole. The middle part of the ground contact rod 5-4 is a step structure corresponding to the step hole, and a compression spring 6-4 is sleeved on the ground contact rod 5-4 above the step structure.

[0012] As another preferred embodiment, the mounting seat 5-3 of the present invention is connected to the pressure plate 6-5 through the pressure plate screw 6-2, and a ground rod hole is provided in the middle of the pressure plate 6-5 corresponding to the upper end of the ground rod 5-4, and a spring pick 5-5 of the limit switch 5-2 is provided above the ground rod 5-4 corresponding to the upper end of the ground rod 5-4. The limit switch 5-2 is connected to the mounting plate 5-1 through the limit switch connecting screw 6-1, and the mounting plate 5-1 is connected to the mounting seat 5-3 through the mounting plate connecting screw 6-3 and the mounting plate connecting hole; the upper end of the compression spring 6-4 is against the lower end of the pressure plate 6-5.

[0013] As another preferred solution, the connecting hole of the mounting plate of the present invention is a vertical elongated hole.

[0014] As another preferred solution, the mounting seat 5-3 of the present invention is welded to the base of the column 1-1.

[0015] Secondly, the two sides of the hydraulic trailer 4-1 of the present invention are connected to the rear end of the right-angle connecting rod 4-2 through the right-angle connecting rod connecting bolts 2-8. The front end of the right-angle connecting rod connecting bolts 2-8 passes through the through hole on the right-angle connecting rod 4-2 and is screwed into the threaded hole on the hydraulic trailer 4-1. The right-angle connecting rod connecting bolts 2-8 on the inner side of the right-angle connecting rod 4-2 are screwed with an adjusting nut 2-8-1.

[0016] In addition, the right-angle connecting rod 4-2 of the present invention includes a rear inner longitudinal rod 2-22, a front transverse rod 2-23 and a front outer vertical rod 2-21. The front end of the rear inner longitudinal rod 2-22 is fixedly connected to the inner end of the front transverse rod 2-23, and the upper end of the front outer vertical rod 2-21 is fixedly connected to the outer end of the front transverse rod 2-23.

[0017] The inner end of the front cross bar 2-23 is connected to the inner side of the rear end of the column base 4-4 through the inner end bolt 2-10, and the front end of the inner end bolt 2-10 passes through the through hole on the column base 4-4 and is screwed into the threaded hole at the inner end of the front cross bar 2-23; the outer end of the front cross bar 2-23 is connected to the outer side of the rear end of the column base 4-4 through the outer end bolt 2-11, and the front end of the outer end bolt 2-11 passes through the through hole on the column base 4-4 and is screwed into the threaded hole at the outer end of the front cross bar 2-23.

[0018] The utility model has beneficial effects.

[0019] The support wheels 4-7 of the present invention are mounted on the column base 4-4 and connected to the hydraulic trolley 4-1 via a connecting rod. When the support wheels 4-7 extend out of the lower plane of the column base 4-4, the support wheels 4-7 contact the ground, lifting the entire lift off the ground via the base. The hydraulic trolley 4-1 can then be used to push the lift to a desired working position. When the lift needs to lift a vehicle, the support wheels 4-7 are retracted into the column base 4-4, and the lower plane of the column base 4-4 fully contacts the ground. The original three-point contact during the mobile state is transformed into surface contact with the lower plane of the column base 4-4, significantly increasing the support area and improving the stability of the lift during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The scope of protection of the present invention is not limited to the following description.

[0021] Figure 1 It is a diagram showing the connection relationship of the relevant components of the utility model in the single-post lift.

[0022] Figure 2 It is a diagram showing the components of the relevant parts of the present invention.

[0023] Figure 3 It is a diagram showing the internal structure of the connection between the trailer top rod 2-7 and the bracket 3-1, which are components of the utility model.

[0024] Figure 4 It is a diagram showing the interconnection of the utility model in the assembled state.

[0025] Figure 5 This is a diagram showing the position and composition of the safety protection parts related to the utility model in the whole machine.

[0026] Figure 6 It is a detailed diagram of the safety protection part of the utility model.

[0027] Figure 7 This is a diagram showing the utility model in which the support wheels are extended to lift the lift off the ground.

[0028] Figure 8 This is a diagram showing the utility model where the support wheels are retracted and the lift base falls to the ground.

[0029] Figure 9 This is a schematic structural diagram of a hydraulic trailer of the present utility model.

[0030] Figure 10 This is a schematic diagram of the right-angle connecting rod structure of the utility model. DETAILED DESCRIPTION

[0031] As shown in the figure, the utility model includes a hydraulic trailer 4-1 and a bracket 3-1. The upper end of the top rod 2-7 of the hydraulic trailer 4-1 is provided with a ball socket, and a ball 2-6 is provided in the ball socket;

[0032] The front end of the bracket 3-1 is connected to the rear end of the lower part of the column 1-1. The rear end of the bracket 3-1 is provided with a blind hole cylindrical sleeve 3-2. The middle part of the blind hole cylindrical sleeve 3-2 is provided with a conical surface corresponding to the sphere 2-6. The upper end of the sphere 2-6 rests on the conical surface.

[0033] An annular groove 2-7-1 is provided on the upper portion of the push rod 2-7, and a transverse threaded hole is provided on the lower portion of the blind hole cylindrical sleeve 3-2. The front end of the screw 2-4 is screwed through the transverse threaded hole and placed in the annular groove 2-7-1;

[0034] The two sides of the hydraulic trailer 4-1 are connected to the rear end of the right-angle connecting rod 4-2. The front end of the right-angle connecting rod 4-2 is connected to the rear end of the column base 4-4. The front lower end of the right-angle connecting rod 4-2 is connected to the rear end of the fork joint 4-3 via a pin 2-12. The front end of the fork joint 4-3 is connected to the rear end of the connecting rod 4-9 via a thread. The front end of the connecting rod 4-9 is connected to the rear end of the joint 4-8 via a thread. The front end of the joint 4-8 is connected to the rear upper end of the wheel frame 4-6 via a connecting shaft 2-19.

[0035] The supporting wheel 4-7 is mounted on the wheel frame 4-6 through the wheel axle 4-5, and the wheel frame 4-6 is mounted on the column base 4-4 through the wheel frame shaft 2-15.

[0036] like Figure 1 As shown, each single-post lift consists of a column 1-1, a trolley 1-2, support legs 1-3 (one on each side), an electrical control box 1-4, a pump station 1-5, a hydraulic trolley 4-1, and a cylinder (located within column 1-1 but not shown). Support legs 1-3 are mounted on trolley 1-2, which is mounted within column 1-1. Trolley 1-2 is driven by a hydraulic cylinder (located within column 1-1 but not shown) mounted on it, allowing it to move up and down along column 1-1.

[0037] Hydraulic trailer 4-1 and bracket 3-1, right angle connecting rod 4-2 (one on each side, refer to Figure 4 4-2), connecting rod 4-9 (one on each side), supporting wheel 4-7 (one on each side), wheel frame 4-6 (one on each side) constitute the relevant parts of this utility model through connecting bolts, joints, pins, etc.

[0038] Figure 2 This is a diagram showing the connection of the relevant components of the present invention. The connection structure of this part is bilaterally symmetrical, and the following description only describes one side, and the same applies below.

[0039] The spheres 2-6 are steel balls.

[0040] It also includes a mounting seat 5-3, which is arranged at the rear end of the column base 4-4. A step hole is provided in the mounting seat 5-3, and a ground contact rod 5-4 is provided in the step hole. The middle part of the ground contact rod 5-4 is a step structure corresponding to the step hole, and a compression spring 6-4 is sleeved on the ground contact rod 5-4 above the step structure.

[0041] The mounting seat 5-3 is connected to the pressure plate 6-5 through the pressure plate screw 6-2, and a touch rod hole is provided in the middle of the pressure plate 6-5 corresponding to the upper end of the touch rod 5-4, and a spring pick 5-5 of the travel switch 5-2 is provided above the touch rod 5-4 corresponding to the upper end of the touch rod 5-4. The travel switch 5-2 is connected to the mounting plate 5-1 through the travel switch connecting screw 6-1, and the mounting plate 5-1 is connected to the mounting seat 5-3 through the mounting plate connecting screw 6-3 and the mounting plate connecting hole; the upper end of the compression spring 6-4 is against the lower end of the pressure plate 6-5.

[0042] The mounting plate connection hole is a vertical elongated hole, which facilitates adjustment of the setting position of the travel switch 5-2 and facilitates position detection and adjustment during actual use.

[0043] The mounting seat 5-3 is welded to the base of the column 1-1.

[0044] like Figure 5 As shown, mounting base 5-3 is welded to the lower rear of column base 4-4. A stepped hole is machined in the center of mounting base 5-3, housing a ground contact rod 5-4. The top of ground contact rod 5-4 extends from above mounting base 5-3 and rests against the underside of spring plate 5-5 on travel switch 5-2. Travel switch 5-2 is secured to mounting plate 5-1 with screws. Mounting plate 5-1 is also secured to mounting base 5-3 with screws.

[0045] The two sides of the hydraulic trailer 4-1 are connected to the rear end of the right-angle connecting rod 4-2 via right-angle connecting rod bolts 2-8. The front ends of the right-angle connecting rod bolts 2-8 pass through the through holes in the right-angle connecting rod 4-2 and are screwed into the threaded holes in the hydraulic trailer 4-1. Adjustment nuts 2-8-1 are screwed onto the right-angle connecting rod bolts 2-8 on the inside of the right-angle connecting rod 4-2. Adjustment nuts 2-8-1 are installed on the bolts 2-8 near hole K on one side of the hydraulic trailer 4-1 (the same applies to the other side of the hydraulic trailer 4-1). The adjustment nuts 2-8-1 leave a certain amount of clearance at the head of the bolts 2-8 to facilitate rotation of the right-angle connecting rod 4-2. The adjustment nuts 2-8-1 are then tightened to secure the bolts 2-8 to the trailer 4-1.

[0046] The right-angle connecting rod 4-2 includes a rear inner longitudinal rod 2-22, a front cross rod 2-23 and a front outer vertical rod 2-21. The front end of the rear inner longitudinal rod 2-22 is fixedly connected to the inner end of the front cross rod 2-23, and the upper end of the front outer vertical rod 2-21 is fixedly connected to the outer end of the front cross rod 2-23.

[0047] The inner end of the front crossbar 2-23 and the inner side of the rear end of the column base 4-4 (i.e. Figure 2 The front end of the inner end bolt 2-10 passes through the through hole on the column base 4-4 and is screwed into the threaded hole on the inner end of the front cross bar 2-23; the outer end of the front cross bar 2-23 is connected to the outer side of the rear end of the column base 4-4 (i.e. Figure 2 The front end of the outer end bolt 2-11 passes through the through hole on the column base 4-4 and is screwed into the threaded hole on the outer end of the front cross bar 2-23.

[0048] The depth of the threaded hole at the end of the bolt rod of the inner end bolt 2-10 is required. The depth of the threaded hole ensures that after the inner end bolt 2-10 is tightened, a certain gap is left between the head of the inner end bolt 2-10 and the side of the F hole plate to facilitate the rotation of the right-angle connecting rod 4-2 at this point.

[0049] The depth of the threaded hole at the end of the bolt rod of the outer end bolt 2-11 is required. The depth of the threaded hole ensures that after the outer end bolt 2-11 is tightened, a certain gap is left between the head of the outer end bolt 2-11 and the side of the G hole plate to facilitate the rotation of the right-angle connecting rod 4-2 at this point.

[0050] The length of the portion of the right-angle connecting rod 4-2 connected between the F hole plate and the G hole plate is less than the distance between the F hole plate and the G hole plate. Due to the clearance between the heads of the bolts 2-10 and 2-11, the right-angle connecting rod 4-2 can rotate flexibly around the F hole and the G hole.

[0051] Bracket 3-1 is connected to column 1-1 via bolts 2-2 (four sets in total) to form a single unit. For ease of description and understanding, this section is collectively referred to as component A.

[0052] Hydraulic trolley 4-1 is connected to right-angle link 4-2 via bolt 2-8. The other end of right-angle link 4-2 is connected to link 4-9 via pin 2-12 and fork joint 4-3. The other end of link 4-9 is connected to wheel frame 4-6 via joint 4-8 and connecting shaft 2-19. Support wheel 4-7 is mounted on wheel frame 4-6 via axle 4-5. For ease of description and understanding, this part is collectively referred to as component B.

[0053] A downward conical blind hole is machined on the cylindrical sleeve 3-2 at the rear end of the bracket 3-1, namely point C in the figure.

[0054] The end of the push rod 2-7 on the hydraulic trailer 4-1 is processed with a ball socket, which is D in the figure. The ball 2-6 is placed in the ball socket at D, and the exposed part of the ball 2-6 contacts the conical surface of the conical blind hole at C. An annular groove 2-7-1 is processed just below D, which is E in the figure. The screw 2-4 installed on the bracket 3-1 is just at the position of the annular groove 2-7-1 at E, so that the push rod 2-7 on the hydraulic trailer 4-1 will not fall out of the conical blind hole at C. In this way, the ball 2-6 connects C and D together to form a movable joint. In other words, components A and B form a movable connection point here ( Figure 4 M1 in ).

[0055] Several other active connection points between components A and B are as follows:

[0056] The right-angle connecting rod 4-2 is connected to the hole F in the figure by bolt 2-10 ( Figure 4 The active connection point M2 in the figure is connected to the hole G in the figure through bolts 2-11 ( Figure 4 The wheel frame 4-6 is connected to the H hole in the figure through the connecting shaft 2-15 ( Figure 4 Active connection point M6 in the ).

[0057] Figure 3 It is a diagram showing the specific structure of the active connection point M1 described above.

[0058] As mentioned above, the ball 2-6 is placed in the ball socket above the push rod 2-7, and the ball 2-6 is pressed against the conical surface inside the blind hole cylindrical sleeve 3-2 on the bracket 3-1. Figure 2 The screw 2-4 (at point E, the same below) directly opposes the push rod 2-7 and the ball 2-6 at its tip, preventing it from falling out. Because the threaded end of the screw 2-4 is spaced from the cylindrical surface of the annular groove 2-7-1 on the push rod 2-7, and the diameter of the blind hole in the bracket 3-1 is much larger than the diameter of the end of the push rod 2-7, the push rod 2-7 can swing around the ball 2-6 within the blind hole cylindrical sleeve 3-2 within a certain range, thereby adaptively adjusting its position as the push rod 2-7 extends and retracts, forming a structure similar to a ball joint.

[0059] As mentioned above, the hydraulic trailer 4-1 ( Figure 4 ) The connection structures on both sides are symmetrical, so the following description is only for Figure 4 The side shown is described.

[0060] Support wheel 4-7 is installed on the wheel frame 4-6 by wheel axle 4-5, and support wheel 4-7 can rotate freely around wheel axle 4-5. Wheel frame 4-6 is installed on the column base 4-4 by wheel frame shaft 2-15, and wheel frame 4-6 can rotate around wheel frame shaft 2-15.

[0061] like Figure 4 As shown, according to the above description, the movable connection point between the hydraulic trailer 4-1 and the column 1-1 is M1. The movable connection point between the hydraulic trailer 4-1 and the right-angle connecting rod 4-2 is M3. The movable connection points between the right-angle connecting rod 4-2 and the column base 4-4 are M2 and M4. The right-angle connecting rod 4-2 can swing around the movable connection points M2 and M4. The lower end of the right-angle connecting rod 4-2 is connected by a pin 2-12 ( Figure 2 ) is connected to the fork joint 4-3, and the two form a movable connection point M5. The fork joint 4-3 is connected to the connecting rod 4-9 through a thread. The other end of the connecting rod 4-9 is connected to the joint 4-8 through a thread. The joint 4-8 is connected to the connecting shaft 2-19 ( Figure 2 ) forms a movable connection point M7 with the wheel frame 4-6.

[0062] like Figure 4 As shown, because the movable connection point between the hydraulic trailer 4-1 and the column 1-1 is M1, and the movable connection point between the hydraulic trailer 4-1 and the right-angle connecting rod 4-2 is M3, when the top rod 2-7 ( Figure 3 ) is extended or retracted, the distance between the movable connection points M1 and M3 will increase or decrease accordingly. Figure 3 ) When the extension increases, one end of the movable connection point M3 of the right-angle link 4-2 moves downward, driving the right-angle link 4-2 to swing downward in the direction of the curved arrow around the movable connection points M2 and M4. The swing is reflected in the movable connection point M5 at the lower end of the right-angle link 4-2, and it becomes that point M5 swings around the movable connection point M4 in the direction of the curved arrow. Driven by the movable connection point M5, the connecting rod 4-9 moves to the right in the direction of the arrow, thereby driving the wheel frame 4-6 to rotate around the movable connection point M6 through the movable connection point M7. Finally, driven by the wheel frame 4-6, the support wheel 4-7 is pushed out of the lower plane of the column 1-1.

[0063] As mentioned above, when the distance between the movable connection points M1 and M3 reaches the maximum (pressing the handle of the hydraulic trailer 4-1 to make the top rod 2-7 of the hydraulic trailer 4-1 ( Figure 3 ) is raised to the maximum (the hydraulic trailer 4-1 is an existing conventional product, and pressing the handle of the hydraulic trailer 4-1 to raise the top rod 2-7 of the hydraulic trailer 4-1 is a conventional function of the hydraulic trailer 4-1), and the support wheel 4-7 is also pushed out to the limit position. At this time, the support state of the lift base is as follows Figure 7 In this state, the lift is completely lifted off the ground by the support wheels 4-7 on both sides (symmetrically positioned on the left and right) and the trailer wheels 4-10 of the hydraulic trailer 4-1, so the lift can be moved to a different working position.

[0064] After moving the lift to a suitable working position, operate the handle on the hydraulic trailer 4-1 to release the lifting force of the hydraulic trailer 4-1, and push the top rod 2-7 ( Figure 3 ) retracts under the action of the lift's gravity, and the distance between the movable connection points M1 and M3 is minimized. As described above, in contrast, when the distance between the movable connection points M1 and M3 is minimized, the right-angle connecting rod 4-2, connecting rod 4-9, wheel frame 4-6 and other related components will move in the opposite direction described above, and finally the support wheel 4-7 retracts to the lower plane of the column base 4-4, and the trailer wheel 4-10 on the hydraulic trailer 4-1 is also driven off the ground. At this time, the support state of the lift base is as follows: Figure 8 shown.

[0065] exist Figure 8 In the supported state shown, the lower surface of the column base 4-4 is in full contact with the ground. The original three-point contact in the mobile state is transformed into a surface contact of the lower surface of the column base 4-4, which greatly increases the support area and improves the stability of the lift during use. At the same time, since the support wheel 4-7 is not in contact with the ground, it plays a role in protecting the support wheel 4-7 and the trailer wheel 4-10.

[0066] Figure 6 This is a detailed diagram of the safety protection part of the present invention. The mounting seat 5-3 is welded to the lower rear of the column base 4-4. A step hole is machined in the middle of the mounting seat 5-3, and a grounding rod 5-4 is installed inside. The middle part of the grounding rod 5-4 is a step structure, with the thick end facing downward. After the step in the middle hits the step of the middle hole of the mounting seat 5-3, it will not move down anymore. The upper end of the grounding rod 5-4 is thinner, and a compression spring 6-4 is sleeved on it. Two threaded holes are machined at the top of the mounting seat 5-3, and the pressure plate 6-5 is fixed to the mounting seat 5-3 through these two threaded holes. There is a round hole in the middle of the pressure plate 6-5, and the top of the grounding rod 5-4 extends from this round hole and presses against the bottom of the spring pick 5-5 of the travel switch 5-2. The top of the compression spring 6-4 is pressed by the pressure plate 6-5 and is in a compressed state. In this way, under the action of the compression spring 6-4, the bottom of the grounding rod 5-4 is always in the lowest position when it does not touch the ground. Reference Figure 7 , the ground contact rod 5-4 is in a suspended state. At this position, the spring pick 5-5 of the limit switch 5-2 is in a non-triggering state. At this time, the limit switch 5-2 is disconnected, cutting off the control circuit and making the lift unable to work.

[0067] exist Figure 8 In the support state shown, the lower plane of the column base 4-4 will be in full contact with the ground. At this time, the ground contact rod 5-4 ( Figure 6 ) When the bottom contacts the ground and moves upward, it will trigger the spring pick 5-5 to make the limit switch 5-2 connect the control circuit. At this time, the lift can work normally.

[0068] From the above description, we can see that Figure 6The safety protection part of the utility model shown in the figure can effectively protect the mobile support wheel mechanism of the whole machine, and avoid the column base 4-4 from falling to the ground due to negligence, when the mobile support wheel mechanism is still under stress (i.e. Figure 7 The use of the lift (in the supported state shown) may cause damage to the mobile support wheel mechanism, thereby effectively protecting the mechanism.

[0069] It can be understood that the above specific description of the present invention is only used to illustrate the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Ordinary technicians in this field should understand that the present invention can still be modified or replaced by equivalents to achieve the same technical effects; as long as the use requirements are met, they are within the scope of protection of the present invention.

Claims

1. A novel mobile retractable support wheel mechanism, comprising a hydraulic trailer (4-1) and a bracket (3-1), characterized in that A ball socket is provided at the upper end of the top rod (2-7) of the hydraulic trailer (4-1), and a sphere (2-6) is provided in the ball socket; The front end of the bracket (3-1) is connected to the rear end of the lower part of the column (1-1); the rear end of the bracket (3-1) is provided with a blind hole cylindrical sleeve (3-2); the middle part of the blind hole cylindrical sleeve (3-2) is provided with a conical surface corresponding to the sphere (2-6); the upper end of the sphere (2-6) rests on the conical surface; An annular groove (2-7-1) is provided on the upper portion of the push rod (2-7), a transverse threaded hole is provided on the lower portion of the blind hole cylindrical sleeve (3-2), and the front end of the screw (2-4) is screwed through the transverse threaded hole and placed in the annular groove (2-7-1); The hydraulic trailer (4-1) is connected to the rear end of the right-angle connecting rod (4-2) by shafts on both sides. The front end of the right-angle connecting rod (4-2) is connected to the rear end of the column base (4-4) by shafts. The front lower end of the right-angle connecting rod (4-2) is connected to the rear end of the connecting rod (4-9) through a pin shaft (2-12). The front end of the connecting rod (4-9) is connected to the rear upper end of the wheel frame (4-6) through a connecting shaft (2-19). The supporting wheel (4-7) is mounted on the wheel frame (4-6) via the wheel axle (4-5), and the wheel frame (4-6) is mounted on the column base (4-4) via the wheel frame shaft (2-15).

2. A novel movable and retractable support wheel mechanism according to claim 1, characterized in that The front lower end of the right-angle connecting rod (4-2) is connected to the rear end of the fork joint (4-3) via a pin shaft (2-12); the front end of the fork joint (4-3) is connected to the rear end of the connecting rod (4-9) via a thread; the front end of the connecting rod (4-9) is connected to the rear end of the joint (4-8) via a thread; and the front end of the joint (4-8) is connected to the rear upper end of the wheel frame (4-6) via a connecting shaft (2-19).

3. A novel movable and retractable support wheel mechanism according to claim 1, characterized in that The spheres (2-6) are steel balls.

4. A novel movable and retractable support wheel mechanism according to claim 1, characterized in that The utility model also comprises a mounting seat (5-3), the mounting seat (5-3) being arranged at the rear end of the column base (4-4), a step hole being arranged in the mounting seat (5-3), a ground contact rod (5-4) being arranged in the step hole, a step structure corresponding to the step hole being arranged in the middle of the ground contact rod (5-4), and a compression spring (6-4) being sleeved on the ground contact rod (5-4) above the step structure.

5. A novel movable and retractable support wheel mechanism according to claim 4, characterized in that The mounting seat (5-3) is connected to the pressing plate (6-5) via a pressing plate screw (6-2); a contact rod hole is provided in the middle of the pressing plate (6-5) corresponding to the upper end of the contact rod (5-4); a spring paddle (5-5) of a travel switch (5-2) is provided above the contact rod (5-4) corresponding to the upper end of the contact rod (5-4); the travel switch (5-2) is connected to the mounting plate (5-1) via a travel switch connecting screw (6-1); the mounting plate (5-1) is connected to the mounting seat (5-3) via the mounting plate connecting screw (6-3) and the mounting plate connecting hole; the upper end of the compression spring (6-4) abuts against the lower end of the pressing plate (6-5).

6. A novel movable and retractable support wheel mechanism according to claim 5, characterized in that The connecting hole of the mounting plate is a vertical long hole.

7. A novel movable and retractable support wheel mechanism according to claim 4, characterized in that The mounting seat (5-3) is welded to the base of the column (1-1).

8. The novel movable and retractable support wheel mechanism according to claim 1 is characterized in that The two sides of the hydraulic trailer (4-1) are connected to the rear end of the right-angle connecting rod (4-2) via right-angle connecting rod connecting bolts (2-8); the front end of the right-angle connecting rod connecting bolt (2-8) passes through the through hole on the right-angle connecting rod (4-2) and is screwed into the threaded hole on the hydraulic trailer (4-1); and an adjusting nut (2-8-1) is screwed onto the right-angle connecting rod connecting bolt (2-8) on the inner side of the right-angle connecting rod (4-2).

9. The novel movable and retractable support wheel mechanism according to claim 1, characterized in that The right-angle connecting rod (4-2) comprises a rear inner longitudinal rod (2-22), a front transverse rod (2-23) and a front outer vertical rod (2-21); the front end of the rear inner longitudinal rod (2-22) is fixedly connected to the inner end of the front transverse rod (2-23); and the upper end of the front outer vertical rod (2-21) is fixedly connected to the outer end of the front transverse rod (2-23); The inner end of the front crossbar (2-23) is connected to the inner side of the rear end of the column base (4-4) via an inner end bolt (2-10), and the front end of the inner end bolt (2-10) passes through the through hole on the column base (4-4) and is screwed into the threaded hole at the inner end of the front crossbar (2-23); the outer end of the front crossbar (2-23) is connected to the outer side of the rear end of the column base (4-4) via an outer end bolt (2-11), and the front end of the outer end bolt (2-11) passes through the through hole on the column base (4-4) and is screwed into the threaded hole at the outer end of the front crossbar (2-23).

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