阅读说明：本技术 一种用于拆胎机的脚踏机构 (Pedal mechanism for tire dismounting machine ) 是由 高空 冯天龙 曾峰 于 2020-06-30 设计创作，主要内容包括：本发明涉及拆胎设备技术领域,公开了一种用于拆胎机的脚踏机构,其包括：脚踏总成,其包括连接杆和至少一个踏板,所述踏板绕所述连接杆旋转；倒顺开关,所述倒顺开关的输出轴套设有拨片,且所述倒顺开关具有正向第二档位、正向第一档位、空档位和反向第一档位；双速电机,其与所述倒顺开关电连接；曲柄连杆装置,其包括依次连接的第一连杆、第二连杆和第三连杆,所述第一连杆的一端与其中一个所述踏板固定连接,所述第一连杆的另一端与所述第二连杆的一端铰接,所述第二连杆的另一端与所述第三连杆的一端铰接,所述第三连杆的另一端与所述拨片连接。本发明能达到拆胎机具有两种不同的转动速度,从而使得拆胎机的适用范围扩大的目的。(The invention relates to the technical field of tire dismounting equipment, and discloses a pedal mechanism for a tire dismounting machine, which comprises: a pedal assembly including a connecting rod and at least one pedal, the pedal rotating about the connecting rod; the reversing switch is provided with a forward second gear, a forward first gear, a neutral gear and a reverse first gear; the double-speed motor is electrically connected with the reversing switch; the crank connecting rod device comprises a first connecting rod, a second connecting rod and a third connecting rod which are sequentially connected, one end of the first connecting rod is fixedly connected with one pedal, the other end of the first connecting rod is hinged to one end of the second connecting rod, the other end of the second connecting rod is hinged to one end of the third connecting rod, and the other end of the third connecting rod is connected with the shifting piece. The invention can achieve the purpose that the tire dismounting machine has two different rotating speeds, thereby enlarging the application range of the tire dismounting machine.)

1. A pedal mechanism for a tyre changer, comprising:

a pedal assembly including a connecting rod and at least one pedal, the pedal rotating about the connecting rod;

the reversing switch is provided with a forward second gear, a forward first gear, a neutral gear and a reverse first gear;

the double-speed motor is electrically connected with the reversing switch;

the crank connecting rod device comprises a first connecting rod, a second connecting rod and a third connecting rod which are sequentially connected, one end of the first connecting rod is fixedly connected with one pedal, the other end of the first connecting rod is hinged with one end of the second connecting rod, the other end of the second connecting rod is hinged with one end of the third connecting rod, and the other end of the third connecting rod is connected with the shifting piece;

wherein the pedal connected with the crank connecting rod device is connected with the connecting rod through an elastic resetting device, a line segment pointing from one end of the first connecting rod to the other end is a first force arm, a line segment pointing from one end of the third connecting rod to the other end is a second force arm,setting the ratio of the length of the first force arm to the length of the second force arm as r₁Let the angle between the rotation from the reverse first gear to the forward second gear be θ₁Let the rotation angle of the pedal be θ₂Theta of₁And said theta₂Has a ratio of r₂Said r₁And said r₂Are equal.

2. The pedal mechanism for a tire dismounting machine as claimed in claim 1, wherein the first connecting rod comprises a first connecting portion and a space-avoiding portion, one end of the first connecting portion is fixedly connected with the pedal through a first fastening member, the other end of the first connecting portion is integrally connected with one end of the space-avoiding portion, the other end of the space-avoiding portion is hinged with the second connecting rod, and the space-avoiding portion is disposed away from the pedal assembly.

3. The pedal mechanism for the tire dismounting machine as claimed in claim 2, wherein the clearance part is provided with a clearance groove relative to the inner side surface of the first connecting part, and the width of the clearance groove is 20-25 mm.

4. The pedal mechanism for a tire dismounting machine as claimed in claim 2, wherein said resilient return means has two spaced apart force-bearing segments, said force-bearing segments extending in opposite directions, said first fastening member being located between said force-bearing segments.

5. A pedal mechanism for a tyre changer according to claim 2, characterized in that the angle between the first connecting portion and the escape portion is 105 ° -110 °.

6. The footrest mechanism for tire dismounting machine of claim 5, wherein said third link includes a second connecting portion and a third connecting portion integrally connected to said second connecting portion, and an angle between said second connecting portion and said third connecting portion is 125 ° -135 °;

the second connecting portion is hinged to the second connecting rod, and the third connecting portion is connected with the shifting piece.

7. The pedal mechanism for a tire demounting machine as claimed in claim 1, wherein θ₁Is 175 deg., said theta₂At 73 deg..

Technical Field

The invention relates to the technical field of tire dismounting equipment, in particular to a pedal mechanism for a tire dismounting machine.

Background

At present, a tire dismounting machine is maintenance equipment of an automobile, the existing tire dismounting machine comprises a pedal switch, a servo motor controller, a servo motor and a speed reducing device, the pedal switch is connected with the servo motor controller, the servo motor is controlled through the servo motor controller, the servo motor drives the speed reducing device, the output end of the speed reducing device is connected with a working disc of the tire dismounting machine, and the working disc rotates under the action of the servo motor and the speed reducing device, so that a tire is separated from a rim. However, the existing tire dismounting machine generally has only three gears, namely a forward gear, a neutral gear and a reverse gear, wherein the rotating speeds corresponding to the forward gear and the reverse gear are equal, so that the tire dismounting machine has only one rotating speed, and a worker cannot adjust the rotating speed of the tire dismounting machine according to the type of a tire, so that the application range of the tire dismounting machine is narrow.

Disclosure of Invention

The purpose of the invention is: the invention provides a pedal mechanism for a tire dismounting machine, which aims to achieve the purpose that the tire dismounting machine has two different rotating speeds, so that the application range of the tire dismounting machine is expanded.

In order to achieve the above object, the present invention provides a pedal mechanism for a tire changer, comprising:

a pedal assembly including a connecting rod and at least one pedal, the pedal rotating about the connecting rod;

the reversing switch is provided with a forward second gear, a forward first gear, a neutral gear and a reverse first gear;

the double-speed motor is electrically connected with the reversing switch;

the crank connecting rod device comprises a first connecting rod, a second connecting rod and a third connecting rod which are sequentially connected, one end of the first connecting rod is fixedly connected with one pedal, the other end of the first connecting rod is hinged with one end of the second connecting rod, the other end of the second connecting rod is hinged with one end of the third connecting rod, and the other end of the third connecting rod is connected with the shifting piece;

whereinThe pedal connected with the crank connecting rod device is connected with the connecting rod through an elastic resetting device, a line segment pointing to the other end from one end of the first connecting rod is set as a first force arm, a line segment pointing to the other end from one end of the third connecting rod is set as a second force arm, and the ratio of the length of the first force arm to the length of the second force arm is set as r₁Let the angle between the rotation from the reverse first gear to the forward second gear be θ₁Let the rotation angle of the pedal be θ₂Theta of₁And said theta₂Has a ratio of r₂Said r₁And said r₂Are equal.

In some embodiments of the present application, the first connecting rod includes a first connecting portion and a space-avoiding portion, one end of the first connecting portion is fixedly connected to the pedal through a first fastener, the other end of the first connecting portion is integrally connected to one end of the space-avoiding portion, the other end of the space-avoiding portion is hinged to the second connecting rod, and the space-avoiding portion faces away from the pedal assembly.

In some embodiments of the present application, the clearance portion is provided with a clearance groove with respect to an inner side surface of the first connection portion, and a width of the clearance groove is 20 to 25 mm.

In some embodiments of the present application, the elastic restoring device has two force-bearing sections arranged at intervals, the two force-bearing sections extend in opposite directions, and the first fastening member is located between the two force-bearing sections.

In some embodiments of the present application, an angle between the first connection portion and the void-avoiding portion is 105 ° to 110 °.

In some embodiments of the present application, the third link includes a second connection portion and a third connection portion integrally connected with the second connection portion, and an included angle between the second connection portion and the third connection portion is 125 ° -135 °;

the second connecting portion is hinged to the second connecting rod, and the third connecting portion is connected with the shifting piece.

In some embodiments of the present applicationθ₁Is 175 deg., said theta₂At 73 deg..

The embodiment of the invention provides a pedal mechanism for a tire dismounting machine, which has the following beneficial effects compared with the prior art:

according to the pedal mechanism for the tire dismounting machine, when the pedal switch rotates upwards or downwards from the neutral position, the pedal drives the first connecting rod to rotate, the first connecting rod drives the second connecting rod to rotate, the second connecting rod drives the third connecting rod to rotate, and the third connecting rod drives the shifting piece to rotate, so that the switching of a forward second gear, a forward first gear, a neutral gear and a reverse first gear is completed; in addition, since r is₁And r₂The length of the first connecting rod and the length of the second connecting rod are matched with the angle between the first reverse gear and the second forward gear and the rotation angle of the pedal, so that the extending direction of the second connecting rod and the extending direction of the third connecting rod cannot be overlapped, the crank connecting rod device can avoid dead points, and the reversible switch can be switched among the second forward gear, the first forward gear, the neutral gear and the first reverse gear;

therefore, the pedal mechanism for the tire dismounting machine has two different rotating speeds, so that the application range of the tire dismounting machine is expanded.

Drawings

FIG. 1 is a first schematic structural diagram of a pedal mechanism according to an embodiment of the present invention.

FIG. 2 is a second schematic structural view of the pedal mechanism according to the embodiment of the present invention.

FIG. 3 is a schematic structural view of the pedal mechanism in a neutral position in accordance with the embodiment of the present invention.

FIG. 4 is a schematic structural view of the pedal mechanism in the reverse first gear position in accordance with the embodiment of the present invention.

FIG. 5 is a schematic structural view of the pedal mechanism in the first forward gear position in accordance with the embodiment of the present invention.

FIG. 6 is a schematic structural view of the pedal mechanism in the second forward gear position in accordance with the embodiment of the present invention.

In the figure, 1, a pedal assembly; 11. a connecting rod; 12. a pedal; 2. a reversing switch; 3. a shifting sheet; 4. a crank link device; 41. a first link; 411. a first connection portion; 412. an evacuation section; 42. a second link; 43. a third link; 431. a second connecting portion; 432. a third connecting portion; 5. a first fastener; 6. an empty avoiding groove; 7. a first force-bearing segment; 8. a second force-bearing segment.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", and the like, indicate orientations or positional relationships based on those 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 device or element referred to 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.

As shown in fig. 1 to 6, an embodiment of the present invention provides a pedal mechanism for a tire dismounting machine, including:

a pedal assembly 1 comprising a connecting rod 11 and at least one pedal 12, the pedal 12 rotating around the connecting rod 11;

the reversing switch 2 is characterized in that an output shaft of the reversing switch 2 is sleeved with a shifting piece 3, and the reversing switch 2 is provided with a forward second gear, a forward first gear, a neutral gear and a reverse first gear;

the double-speed motor is electrically connected with the reversing switch 2;

the crank connecting rod device 4 comprises a first connecting rod 41, a second connecting rod 42 and a third connecting rod 43 which are sequentially connected, one end of the first connecting rod 41 is fixedly connected with one pedal 12, the other end of the first connecting rod 41 is hinged with one end of the second connecting rod 42, the other end of the second connecting rod 42 is hinged with one end of the third connecting rod 43, and the other end of the third connecting rod 43 is connected with the plectrum 3;

wherein, the pedal 12 connected with the crank connecting rod device 4 is connected with the connecting rod 11 through an elastic resetting device,let the line segment from one end of the first link 41 to the other end be the first force arm L₁Let the line segment from one end of the third link 43 to the other end be the second force arm L₂A first force arm L is arranged₁Length of and second force arm L₂Has a ratio of length of r₁Let the angle between the first gear in the reverse direction and the second gear in the forward direction be θ₁Let the rotation angle of the pedal 12 be θ₂，θ₁And theta₂Has a ratio of r₂，r₁And r₂Are equal.

Based on the above arrangement, in the pedal mechanism for a tire dismounting machine according to the embodiment of the present invention, when the pedal 12 is rotated upward or downward from the neutral position, the pedal 12 drives the first connecting rod 41 to rotate, the first connecting rod 41 drives the second connecting rod 42 to rotate, the second connecting rod 42 drives the third connecting rod 43 to rotate, and the third connecting rod 43 drives the shift piece 3 to rotate, so as to complete the switching of the forward second gear, the forward first gear, the neutral gear and the reverse first gear; in addition, since r is₁And r₂The length of the first link 41 and the length of the second link 42 are matched with the angle between the first reverse gear and the second forward gear and the rotation angle of the pedal 12, so that the extension direction of the second link 42 and the extension direction of the third link 43 do not coincide, the crank-link device 4 can avoid a dead point, and the reversible switch 2 can be switched among the second forward gear, the first forward gear, the neutral gear and the first reverse gear;

therefore, the pedal mechanism for the tire dismounting machine has two different rotating speeds, so that the application range of the tire dismounting machine is expanded.

In some embodiments of the present application, as shown in fig. 1 to 6, the first connecting rod 41 includes a first connecting portion 411 and a space-avoiding portion 412, one end of the first connecting portion 411 is fixedly connected to the pedal 12 by the first fastening member 5, the other end of the first connecting portion 411 is integrally connected to one end of the space-avoiding portion 412, the other end of the space-avoiding portion 412 is hinged to the second connecting rod 42, and the space-avoiding portion 412 is disposed away from the pedal assembly 1. Thereby, the first connecting portion 411 stably connects the first link 41 with the pedal 12, so that the first link 41 rotates in synchronization with the pedal 12; in addition, the space-saving portion 412 is spaced apart from the pedal assembly 1, and accordingly, the second link 42 and the third link 43 are spaced apart from the pedal assembly 1, so that the first link 41, the second link 42 and the third link 43 do not contact the pedal assembly 1 during the rotation, thereby ensuring the stability of the first link 41 during the rotation.

In some embodiments of the present application, as shown in fig. 1 and 2, the clearance portion 412 is provided with a clearance groove 6 on an inner side surface of the first connecting portion 411, and a width of the clearance groove 6 is 20 to 25 mm. Therefore, the first link 41, the second link 42 and the third link 43 have gaps with the inner side surfaces of the escape part 412, so that the pedal assembly 1 does not obstruct the rotation of the first link 41, the second link 42 and the third link 43, the collision of the first link 41, the second link 42 and the third link 43 with the pedal assembly 1 is effectively avoided, the damage rate of the first link 41, the second link 42 and the third link 43 is reduced, and the practicability is good.

In some embodiments of the present application, as shown in fig. 2, the elastic restoring device has two force-bearing sections arranged at intervals, the two force-bearing sections extend in opposite directions, and the first fastening member 5 is located between the two force-bearing sections. Therefore, a stress section corresponding to the forward second positioning and the forward first forward gear is set as a first stress section 7, a stress section corresponding to the reverse first gear is set as a second stress section 8, the position of the first fastening piece 5 at the neutral gear is set as an initial position, when the reversing switch 2 needs to be switched from the forward second gear or the forward first gear to the neutral gear, a user loosens the pedal 12, and the first fastening piece 5 rotates to the initial position under the elastic action of the first stress section 7, so that the resetting of the crank connecting rod device 4 is facilitated;

when the forward and reverse switch 2 needs to be switched from the reverse gear position to the neutral gear position, the user releases the pedal 12, and the first fastening piece 5 rotates to the initial position under the elastic action of the second stress section 8, so that the resetting of the crank connecting rod device 4 is facilitated.

In some embodiments of the present application, as shown in fig. 1 to 6, an included angle between the first connection portion 411 and the clearance portion 412 is 105 ° to 110 °, the third link 43 includes a second connection portion 431 and a third connection portion 432 integrally connected to the second connection portion 431, an included angle between the second connection portion 431 and the third connection portion 432 is 125 ° to 135 °, wherein the second connection portion 431 is hinged to the second link 42, and the third connection portion 432 is connected to the pick 3. Therefore, the first connecting rod 41 and the third connecting rod 43 are bent pieces, and the strength of the first connecting rod 41 and the strength of the third connecting rod 43 are better; preferably, the angle between the first connection portion 411 and the space-saving portion 412 is 109 °, and the angle between the second connection portion 431 and the third connection portion 432 is 130 °.

In some embodiments of the present application, θ is shown in FIGS. 1-6₁Is 175 DEG theta₂Is 73 DEG theta₁And theta₂The ratio of (2) to (4) and, similarly, the first force arm L₁Length of and second force arm L₂Is also 2.4, the first force arm L₁Length of and second force arm L₂Can be designed as required.

In order to better explain the gear shifting process of the pedal mechanism, as shown in fig. 1 to 6, the positions of the pedal 12 corresponding to the forward second gear, the forward first gear, the neutral gear and the reverse first gear are respectively a first position, a second position, a third position and a fourth position, and the gear shifting process of the pedal mechanism according to the embodiment of the present invention is as follows:

neutral gear: the pedal 12 is in the third position, and the forward and reverse switch 2 is in the neutral position;

the neutral gear is switched to a forward first gear: the pedal 12 rotates anticlockwise, the pedal 12 rotates from the third position to the second position, the third connecting rod 43 rotates anticlockwise, and the poking piece 3 drives the output shaft of the reversing switch 2 to rotate to the forward first gear;

the forward first gear is switched to a forward second gear: the pedal 12 rotates anticlockwise, the pedal 12 rotates from the second position to the first position, the third connecting rod 43 rotates anticlockwise, and the poking piece 3 drives the output shaft of the reversing switch 2 to rotate to the forward second gear;

neutral gear is switched to reverse gear: the pedal 12 rotates clockwise, the pedal 12 rotates from the third position to the fourth position, the third connecting rod 43 rotates anticlockwise, and the plectrum 3 drives the output shaft of the reversing switch 2 to rotate to the first reverse gear;

it should be noted that, when the reversing switch 2 is located at the forward second gear, the second force arm and the second connecting rod 42 are not located at a collinear position, so that the crank-connecting rod device 4 avoids a dead angle, and the reversing switch 2 can be switched from the forward first gear to the forward second gear.

In conclusion, the pedal mechanism for the tire dismounting machine has two different rotating speeds, so that the application range of the tire dismounting machine is expanded.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.