Apparatus for tire lift control

Abstract

The present invention relates to a tire lift control device that controls the inertial rotational force of a DC motor to accurately adjust the tire lifting position and prevents overload of the DC motor. The tire lift control device according to the present invention comprises: a joystick for inputting a user's operation command; a first relay that applies a signal by turning on a contact switch according to the input of the joystick; a timer that operates by the ON signal of the contact switch of the first relay and sets a setting value; a second relay that operates on / off according to the setting value of the timer; a resistor that applies a load to the second relay; a DC motor that operates by an electrical control signal sent from the second relay; and a reduction gear that enables the DC motor to provide driving force at a set rotational speed.

Description

Technology Field

[0001] The present invention relates to a tire lift control device, and more specifically, to a tire lift control device that raises and lowers a tire to facilitate easy removal when replacing or repairing the tire. Background Technology

[0003] Typically, when replacing or repairing tires at a car repair shop, the vehicle is first lifted to a working height using a lift, and then the tires are removed. However, the process of lifting and lowering the tires requires considerable strength, and there are difficulties such as the worker getting injured or damaging the tire wheels due to carelessness.

[0004] In particular, when a worker lifts the tire to assemble it, the process of fitting it in by aligning multiple hub bolts with the fastening holes formed in the tire wheel was quite difficult and cumbersome.

[0005] To resolve the above-mentioned problems, the applicant has introduced prior art, specifically Patent Publication No. 10-2011-0104867 (September 23, 2011), 'tire lift for automobile parking.'

[0006] The aforementioned prior art provides a tire lift for automotive maintenance that provides a lift for raising and lowering tires, allowing a worker to assemble the tires by simply aligning the fastening position while raising and lowering them by the lift, without having to manually lift or lower the tires one by one.

[0007] However, the aforementioned prior art or similar tire lifts are assembled after being raised to the assembly position by operating a control switch. For example, in the case where the position of the fastening hole of the tire wheel is aligned with each of the hub bolts and then fastened with the fastening bolt, fine operation of the lift is required during the process of aligning the fastening hole with each hub bolt. However, due to the characteristics of the tire lift, fine operation is not easy, making the work difficult.

[0008] In other words, the tire lift operates by transmitting power from a DC motor through a reduction gear and a worm gear. However, there was a problem where, when the motor rotates and reaches the desired position, even if the DC motor is turned off by the control switch, the rotation does not stop immediately due to inertia. Consequently, the lift cannot be raised to the desired position and deviates, making it difficult to adjust to the correct position through multiple operations.

[0009] In addition, there was a problem in that the DC motor could be overloaded and burned out due to excessive repeated operation of the switch. Prior art literature

[0011] Republic of Korea Published Patent Application No. 10-2011-0104867 (September 23, 2011) The problem to be solved

[0012] The present invention aims to solve the problems of the past by providing a tire lift control device that accurately adjusts the tire lifting position by controlling the inertial rotational force of a DC motor, and also prevents overloading of the DC motor.

[0013] The problems that the present invention aims to solve are not limited to those mentioned above, and other unmentioned problems will be clearly understood by a person skilled in the art from the description below. means of solving the problem

[0015] To achieve the above objective, the tire lift control device according to the present invention comprises: a joystick for inputting a user’s operation command; a DC motor that operates by an electrical control signal sent through the joystick; and a reduction gear that enables the DC motor to provide driving force at a set rotational speed, wherein the lifting operation is performed, the device comprises: a first relay in which a contact switch is turned on and a signal is applied according to the input of the joystick; a timer that operates by the ON signal of the contact switch of the first relay and has a set value set; a second relay that operates on / off according to the set value of the timer; and a resistor that applies a load to the second relay, wherein the DC motor operates by an electrical control signal sent from the second relay and provides driving force at a rotational speed set in the reduction gear.

[0016] The setting value of the above timer is set in proportion to the resistance, and it is preferable that a time of 0.2 to 0.3 seconds is set for a resistance value of 2Ω (ohm).

[0017] The second relay above is turned on / off according to the setting value of the timer, but it is more preferable that it is short-circuited after one contact operation.

[0018] Other features and more specific details of the present invention are included in the detailed description and drawings. Effects of the invention

[0020] According to the tire lift control device of the present invention, by adjusting the inertial rotational force of the DC motor to accurately adjust the tire lifting position, various effects are achieved, such as increasing the convenience of operation and preventing damage to the DC motor due to overload.

[0021] The effects of the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by a person skilled in the art from the description below. Brief explanation of the drawing

[0023] FIG. 1 is a perspective view showing the overall configuration of a tire lift for automobile maintenance according to the prior art. FIG. 2 is a control block diagram showing an embodiment of a tire lift control device according to the present invention, FIGS. 3 and 4 are photographs showing the exterior of a tire lift control device according to the present invention. Specific details for implementing the invention

[0024] The present invention is susceptible to various modifications and may have various embodiments; specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the invention to specific embodiments, and it should be understood that the invention includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention. Similar reference numerals have been used for similar components in the description of each drawing.

[0025] A preferred embodiment of the present invention will be examined in detail with reference to the attached drawings.

[0026] FIG. 1 is a perspective view showing the overall configuration of a tire lift for automobile maintenance according to the prior art.

[0027] As described above, a tire lift for automobile maintenance according to the prior art is equipped with a base (10) that is vertically erected on a base (10) equipped with wheels (11) to allow movement in any direction, and a support (20) that forms a lifting chamber (21) inside and has a cap (22) attached to the top.

[0028] The base (10) has a lid (12) formed on its top, and provides a driving force at a set rotational speed by means of an electrical control means that sends an electrical control signal inside, and a DC motor (150) and a reduction gear (160).

[0029] A lifting means (not shown) is provided in the lifting room (21) and is operated by driving force to lift the tire mounting means (50). The tire mounting means (50) is provided with a support rod (52) fixed horizontally on both sides of the lower side of a support plate (51) connected to the lifting means, and a mounting rod (54) is provided with a variable plate (53) formed to support one side of the tire on the inside while moving forward and backward, and the mounting rod (54) is installed to rotate around the support rod (52) so that the tire (T) placed on the mounting rod (52) rotates.

[0030] A guide support means (60) is provided to be installed so as to be positioned vertically on one side of an auxiliary support (23) formed on one side of the above support (20), thereby providing balanced support and performing a guide function when the tire mounting means (50) is raised and lowered.

[0031] The above guide support means (60) is configured such that a bracket (62) having a guide shaft (61) is installed vertically on an auxiliary support (23) formed on one side of a support (20), and a guide bushing (63) that slides by being fitted onto the guide shaft (61) is installed to be fixed to a support plate (51), thereby performing a guide function while providing balanced support when the tire mounting means (50) is raised and lowered.

[0032] A stop switch (70) is installed at the upper and lower ends of the above support (20) to control the lifting means (40) from rising or falling further when it reaches the top dead center or bottom dead center.

[0033] Unexplained reference numeral 80 is a mono switch, which operates an electrical control means such that when the lever of the mono switch is raised, the tire mounting means (50) is raised and lowered, and when the lever is lowered, the tire mounting means (50) is lowered. An emergency switch (81) is provided below the mono switch (80) to turn off the power and stop all operations when not in use. Reference numeral 82 is a handle bar provided to facilitate movement by the operator of the present invention.

[0034] FIG. 2 is a control block diagram showing an embodiment of a tire lift control device according to the present invention, and FIG. 3 to 4 are photographs showing the exterior of a tire lift control device according to the present invention.

[0035] As described above, the tire lift control device according to the present invention includes a joystick (100), a first relay (110), a timer (120), a second relay (130), a resistor (140), a DC motor (150), and a reduction gear (160) in order to accurately adjust the tire lifting position by controlling the inertial rotational force of the DC motor.

[0036] That is, the tire lift control device according to the present invention comprises: a joystick (100) for inputting a user's operation command; a DC motor (150) that operates by an electrical control signal sent through the joystick (100); and a reduction gear (160) that enables the DC motor (150) to provide driving force at a set rotational speed, wherein the tire lift control device for performing lifting operations comprises: a first relay (110) that applies a signal by turning on a contact switch according to the input of the joystick (100); a timer (120) that operates by the ON signal of the contact switch of the first relay (110) and sets a setting value; and a second relay (130) that operates on / off according to the setting value of the timer (120). It includes a resistor (140) that applies a load to the second relay (130); and the DC motor (150) operates by an electrical control signal sent from the second relay (130) and provides driving force at a rotational speed set in the reduction gear (160).

[0037] The joystick (100) is operated up, down, left, and right by the user to input the user's operation commands.

[0038] The first relay (110) applies a signal by turning on the contact switch according to the input of the joystick (100).

[0039] The timer (120) is operated by the ON signal of the contact switch of the first relay (110), and it is preferable that the setting value is pre-set.

[0040] For example, the setting value of the timer (120) can be set to a time of 0.2 to 0.3 seconds.

[0041] The second relay (130) is turned on / off according to the setting value of the timer (120).

[0042] The resistor (140) applies a load to the second relay (130).

[0043] The DC motor (150) is operated by an electrical control signal sent from the second relay (130).

[0044] The reduction gear (160) provides driving force at a set rotational speed of the DC motor (150).

[0045] Therefore, the resistor (140) can suppress inertia by applying a load to the DC motor (150) and generating heat. For example, similar to the principle of lighting a lamp by the rotational force of a bicycle's front wheel, the effect of suppressing the rotational force of the front wheel, i.e., inertia, can be obtained.

[0046] At this time, the setting value of the timer (120) is set in proportion to the resistance (140), and it is preferable that a time of 0.2 to 0.3 seconds is set for a resistance (140) value of 2Ω (ohm).

[0047] In addition, the second relay (130) is turned on / off according to the setting value of the timer (120), and is short-circuited after one contact operation, thereby preventing malfunction of the device and damage caused by overheating.

[0048] Accordingly, the tire lift control device according to the present invention controls the inertial rotational force of the DC motor to accurately adjust the tire lifting position, thereby increasing the convenience of operation and preventing damage to the DC motor due to overload.

[0049] The embodiments of the invention described in this specification and the configurations illustrated in the drawings relate to preferred embodiments of the invention and do not encompass all technical concepts of the invention; therefore, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing. Accordingly, the invention is not limited to the embodiments described above, and any person skilled in the art to which the invention belongs can make various modifications without departing from the gist of the invention claimed in the claims, and such modifications fall within the scope of rights described in the claims of the invention. Explanation of the symbols

[0052] 100 : Joystick 110 : 1st Relay 120 : Timer 130 : Second relay 140 : Resistance 150 : DC motor 160 : Reducer

Claims

Claim 1 A joystick (100) for inputting user operation commands; a DC motor (150) that operates by an electrical control signal sent through the joystick (100); A tire lift control device for performing lifting operations, comprising a reduction gear (160) that enables the DC motor (150) to provide driving force at a set rotational speed, wherein the device comprises: a first relay (110) in which a contact switch is turned on and a signal is applied according to the input of the joystick (100); a timer (120) which is operated by the ON signal of the contact switch of the first relay (110) and has a set value set; a second relay (130) which is operated on / off according to the set value of the timer (120); and a resistor (140) which applies a load to the second relay (130); wherein the DC motor (150) provides driving force at a rotational speed set in the reduction gear (160) and is operated by an electrical control signal sent from the second relay (130), and the second relay (130) is operated on / off by being short-circuited after a contact operation once according to the set value of the timer (120), and the A tire lift control device characterized in that the setting value of the timer (120) is set in proportion to the resistance (140), and a time of 0.2 to 0.3 seconds is set for a resistance (140) value of 2Ω (ohm) to prevent damage to the DC motor due to overload. Claim 2 delete Claim 3 delete

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