KR20030090014A - Wheel with caterpillar tread - Google Patents

Abstract

PURPOSE: A crawler device for a moving device is provided to simplify parts and processes and reduce manufacturing cost for mounting a rolling wheel by exactly keeping balance for tension variation of a track, to prevent parts from being separated in passing obstacles as a rough road and stairs and to improve traveling performance by smoothly rotating the track. CONSTITUTION: A crawler device(1) for a moving device is composed of a fixing frame(10) vertically standing at a predetermined shape to support the whole device; rolling wheels(20) mounted at the outer periphery of the fixing frame; and a track(30) rotated along the trace of rolling wheels. The fixing frame has a plurality of lower guide passages(11) directed downward in the lower region and a single upper guide passage(12) horizontally penetrated in the upper region and directed back and forth. Some of rolling wheels are mounted to working units(212) elastically going in and out the lower guide passages through each shock absorbing member(211) and set to rolling wheels(21) for traveling contacted with the track to rotate the track. Others of rolling wheels are mounted to working units(222) elastically going in and out at both sides of a shock absorbing member(221) in the upper guide passage of the fixing frame and set to rolling wheels(22) for balance to keep the balance for tension variation when the track is contacted and rotated.

Description

Caterpillar device for vehicles {Wheel with caterpillar tread}

The present invention relates to an endless track device for moving means, which is mounted on various moving means to allow a smooth passage of a place where the ground is flat and to easily pass an obstacle.

Mobile vehicles such as carts, strollers, skateboards, etc. used in daily life are provided as a circular wheel mounted to cloud movement on the ground so that the user can run without great force. Such a circular wheel for a vehicle can travel without any difficulty in a place where the ground is flat, but when the ground passes an obstacle such as an uneven place or a stairway in a building, the user is moved by large resistance and impact force. It is known to have problems such as difficulty in moving the means.

On the other hand, the present applicant has been researching for a long time to solve the above problems, and as a result, the domestic utility model publication No. 96-534 (published on Jan. 17, 1996) and "roller skate using a buffer wheel" and There is a fact that proposed the "buffer wheel" of Korean Utility Model Publication No. 96-1532 (published Jan. 19, 1996).

The shock-absorbing wheel proposed by the present applicant in the first application disclosure is "a shock-absorbing chain-type shock absorbing wheel composed of an outer chain and an inner bearing so as to easily pass obstacles, which are supported by spring supports on both sides. Before and after the large bearings fixed by the spring, and the plurality of small bearings positioned between them, and the large and small bearings are fixed by a pair of bearing shafts, and the pair of bearings and the bearings are rotated by a joint plate. To this end, the support plate front end and the rear end is composed of a buffer bearing elastically elasticized by a shock absorber having a built-in spring, the chain is coupled to surround the large, so bearing and the buffer bearing The bending piece of the chain piece is formed in a cylindrical shape so as to be perpendicular to the upper surface of the chain plate, and each chain piece can be rotated by a coupling pin. That is coupled to, the chain is formed with an interval of as much as protruding bending portion constituted by the engagement pin and bending of said plate on its inside a predetermined portion bearing width that is a feature of the "technical configuration.

The shock absorbing wheel in this application publication includes a spring bearing supported on a support plate, so-called bearings that are elastically installed, and cushioning bearings that are elastically installed by a shock absorber having their own springs built in front and rear of the support plate. Large and small bearings and shock absorbing bearings are provided with a chain that combines the chain pieces to form a protruding bent portion, so that the large resistance and impact force applied when driving can be overcome, resulting in uneven ground. It has the advantage of being able to easily pass obstacles such as stairways in difficult places or in buildings.

However, the buffer wheel in such an earlier filing disclosure involves several problems that cannot be solved. First, since the large bearings and the buffer bearings are elastically installed as completely different parts and structures, the large bearings and the buffer bearings need not only a variety of parts, but are thus manufactured. The manufacturing cost was increased due to the cumbersome and difficult process, and secondly, because it had an unstable assembly structure in which a plurality of large and small bearings were resiliently installed as a spring fixed by being exposed to the outside of the support plate, a rough place or an uneven ground When passing through obstacles such as stairs in the building, the springs that hold the large and small bearings elastically easily detached, causing frequent failures. Third, the buffer bearings each have a built-in shock absorber. The length of the chain as a fixed elastic force In view of the fact that the shock absorbing bearings fluctuate at their respective positions, the chain does not flexibly maintain the balance of the tension change of the chain, which is frequently changed by the small bearings. Since the resistance to the, there was a problem that results in the buffer wheel can not run smoothly.

Parts that are directly embedded in the fixed frame, and the wheels are resiliently installed in a simple structure.They are designed to flexibly maintain the balance of tension changes in the track that the wheels change from time to time. The purpose is to provide an endless track device for transportation means that can be manufactured economically by reducing the number of work and labor, and secondly, the movement that improves the reliability of the product by minimizing the failure rate of parts that support the rolling wheels elastically. It is an object to provide a crawler device for the means, and the third object is to provide a crawler device for a vehicle for improving the driving ability by allowing the running track to rotate smoothly as the wheels.

Figure 1 is an exploded perspective view showing a caterpillar device for the present invention

Figure 2 is a cross-sectional view showing a crawler device for the present invention moving means

Figure 3 and Figure 4 shows the excavation of the lumbar excipient showing the action of the rolling wheel of the present invention

Figure 5 and Figure 6 is a side view showing the interaction state between the running wheel and the running wheel for the balance and running belt of the present invention

Figure 7 shows a cart employing a crawler for moving means of the present invention

<Description of the symbols for the main parts of the drawings>

1: caterpillar 10: fixed frame

11: lower guide passage 12: upper guide passage

13: Auxiliary Guideway 20: Clouds

21: wheel for driving 22: wheel for balance

23: auxiliary wheels 211, 221, 231: cushioning member

212, 222, 232: Between operation 30: Track

The present invention is a fixed frame (10) standing vertically as a predetermined shape to support the whole, and the wheels (20) are installed so that the rolling motion for each position necessary around the outer circumference of the fixing frame 10, and the wheel In the point consisting of the trajectory (30) that rotates in the trajectory determined along the (20) is the same as the conventional concept of technology.

However, in the caterpillar device (1) for moving means of the present invention, the fixing frame (10) is horizontally in the interior of the plurality of lower guide passages (11) and the upper region respectively directed downward in the interior of the lower region. A single upper guide passage 12 is formed to be opened and directed forward and backward, and some of the wheels 20 each have a buffer member 211 in each of the lower guide passages 11 of the fixing frame 10. Mounted to the operation between the operation 212 to elastically set through the driving wheel 30 is set to the driving wheel to allow the rotation while contacting, 21, another part of the wheel is fixed frame (10) Balanced on the tension change when the traveling track 30 is rotated in contact with each other by being mounted on the operation section 222 which is elastically retracted from both sides with the buffer member 221 interposed in the upper guide passage 12 of To keep you flexible Set to lance cloud wheel 22 for hayeoseo characterized in that on the technical configuration.

In other words, the crawler 1 for moving means of the present invention, as shown in Figures 1 to 6, each buffer member in the lower guide passage 11 formed to be directed downward to the lower region of the fixing frame 10 Mounting the running wheel 21 for the driving wheel (212) in the resilient operation (212), and as the 211, the shock absorbing member 221 in the upper guide passage 12 that is directed back and forth to the upper region of the fixing frame (10) As the balance wheels 22 are mounted on the operation wheels 222 that are elastically retracted from both sides, respectively, the parts are directly embedded in the fixing frame 10, and the wheels 20 are elastically installed as a simple structure. The rolling wheels are configured to keep the balance of the tension change of the traveling track 30, which is frequently changed, flexibly.

Therefore, the caterpillar device (1) of the present invention is the first driving and balance wheels (21, 22) are respectively embedded in the upper and lower guide passages (11) (12) of the fixing frame (10) Since it is elastically installed as the shock absorbing members 211, 221 and the operation (212, 222) to have the same parts and assembly structure, the manufacturing cost by unifying and simplifying the parts and manufacturing process required when installing the wheels And second rolling and balancing wheels 21 and 22 for elasticity as the buffer members 211 and 221 in the upper and lower guide passages 11 and 12 of the fixing frame 10, respectively. Since it has a stable assembly structure that is mounted on the operation between the operation 212, 222, when the ground passes through obstacles, such as uneven rough places or stairs in the building, it prevents the parts from coming off, causing problems To relieve, and third The roller wheels 22 for lance flexibly maintain the balance of the tension change of the driving track 30 which is frequently changed by the driving wheels 21 swinging at their respective positions, so that the driving track smoothly. It will be able to rotate to improve the driving ability and will have the advantage.

Hereinafter, the technical details of the present invention through the specific embodiments shown in the accompanying drawings in detail.

The fixing frame 10 has a trapezoidal shape as a whole and is vertically erected to support the rolling wheels 20 that are elastically installed around the outside.

In addition, the fixing frame 10 is made of a hard synthetic resin or light metal to have a required cross-sectional thickness, and forms a plurality of lower guide passages 11 directed downwards in the lower region, respectively, The single upper guide passage 12 is formed horizontally inside the area and directed forward and backward. Since the lower guide passages 11 and the upper guide passage 12 of the fixing frame 10 allow elastic installation of the wheels 20 as the same part and assembly structure, the wheels 20 are installed. It helps to unify and simplify the time-consuming parts and manufacturing process.

The rolling wheels 20 are composed of driving wheels 21 and balance wheels 22 which are elastically installed in the upper and lower regions of the fixing frame 10, respectively, so that the driving track 30 is smooth. It performs the function to make it rotate easily.

As shown in FIGS. 3 and 4, the driving wheels 21 are elastic through the cushioning members 211 in the lower guide passages 11 formed to be directed downward to the lower region of the fixing frame 10. It is mounted to the rolling motion between the operation 212, which emerges into the, so that the driving trajectory 30 along the rolling wheels 21 for driving to rotate in contact with the cloud.

The balance rolling wheels 22 are intermittently retracted from both sides with the buffer member 221 interposed in the upper guide passage 12 directed forward and backward to the upper region of the fixing frame 10. It is important to equip it for rolling motion. The reason for this is that when the driving wheels 21 swing at their respective positions according to the ground conditions when driving, and a tension change occurs in the traveling track 30, the upper guide passage 12 of the fixing frame 10 Balance wheels 22 mounted on each of the operation wheels 222, which are mounted on both sides with the elastic force distributed between the shock absorbing members 221, and float to both sides, have flexibility in balancing the tension change of the driving trajectory 30. This is to keep it. That is, as shown in Fig. 5, when the front driving wheel 21 is pressed by an obstacle and the front upper part of the traveling track 30 is tense, the front balancing wheel 22 is pressed. The rear wheels 22 for balance are interlocked so as to protrude, and as shown in FIG. 6, the rear wheels 21 for driving are pressed by obstacles so that the upper part of the rear side of the trajectory 30 is closed. When tensioned, the rear balance wheel 22 is pressed and the front balance wheel 22 protrudes so as to protrude, so that the traveling trajectory 30 flexibly maintains the balance against the tension change. It is to be able to rotate.

In addition, the buffer member 211 for buffering the driving wheels 21 to be made as a ball spring having a resilient enough to withstand the weight load and impact force, and cushioning the balance wheels 22 The shock absorbing members 221 are relatively elastic, so that the shock absorbing members 221 are made of a ball spring suitable for balancing the running trajectory 30.

In addition, the driving wheels 212 on which the driving wheels 21 are mounted are formed in a cross-sectional shape corresponding to the lower guide passage 11 of the fixing frame 10 so as to emerge in the vertical direction in the lower guide passage. And the operation wheels 222 on which the balance wheels 22 are mounted are formed in a cross-sectional shape corresponding to the upper guide passage 12 of the fixing frame 10 and emerge in the front-rear direction in the upper guide passage. It should be installed as much as possible.

And, as shown in Figure 2 is installed so as to appear in the up and down direction by the buffer member 231 in the auxiliary guide passage 13 which is vertically opened to the uppermost end of the fixing frame 10 of the rolling wheels 21. Including the auxiliary rolling wheel 23 is mounted to the rolling motion between the operation 232, it will be revealed that the traveling track 30 may be prevented from being in friction contact with the upper portion of the fixing frame (10).

Here, the driving and balance rolling wheels 21 and 22 and the auxiliary rolling wheels 23 are brackets 213 and 223 formed at ends of their respective operations 212, 222 and 232, respectively. It is to be mounted so as not to interfere with the cloud movement by fixing the shaft through the (233).

Further, the traveling and balance rolling wheels 21 and 22 and the auxiliary rolling wheels 22 respectively form recessed grooves 21a, 22a and 23a in the middle portion in the width direction, so as to drive the driving wheel. It is desirable to take action to help prevent the departure of the trajectory 30.

The traveling track 30 may be formed by using a synthetic resin or a metal material in a closed loop shape so as to rotate with a predetermined trajectory along the wheels 20.

In addition, the running track 30 is a separation groove (31) formed integrally with the center of the inner surface of the running and balance wheels (21) 22 and the receiving groove (23) of the auxiliary wheels (23) 21a, 22a, and 23a so as to engage with each other so as to prevent the vehicle track 30 from being detached at random when it rotates.

In the present embodiment configured as described above, the trackless track device 1 for moving means is illustrated as being able to be used by being mounted on the lower part of the cart 2, as shown in FIG. It is to be noted that the track device 1 may be mounted on a moving means such as a baby carriage or a skateboard as needed.

As described above, the crawler for moving means of the present invention is a simple structure that is installed flexibly with the wheels as components directly embedded in the fixed frame accurately balances the tension change of the running track that the wheels change from time to time It can reduce the manufacturing cost by unifying and simplifying the parts and manufacturing process required when installing the wheels, and the separation of parts when the ground passes through obstacles such as uneven places or stairs in buildings. It prevents the problem that causes the failure by preventing, and has a useful effect such as to improve the driving ability by allowing the running track to rotate smoothly.

Claims (4)

The fixed frame 10 standing vertically as a predetermined shape to support the whole, and the rolling wheels 20 are installed so that the rolling motion for each position necessary around the outer circumference of the fixing frame 10, and the rolling wheel 20 In the configuration consisting of a running trajectory 30 rotates along a predetermined trajectory, The fixing frame 10 has a plurality of lower guide passages 11 directed downwardly in the lower region and a single upper guide passage 12 which is horizontally opened inside the upper region and directed forward and backward. Some of the rolling wheels 20 are mounted on the operation period 212 which is elastically indented through the buffer member 211 in the lower guide passages 11 of the fixing frame 10, respectively. It is set as a driving wheel (21) for allowing the 30 to rotate while contacting, another part of the rolling wheel between the buffer member 221 in the upper guide passage 12 of the fixing frame (10) Equipped with each of the operation interval 222 that is elastically indented on both sides to set the balance wheel 22 for balance to keep the balance for the tension change flexibly when the driving trajectory 30 rotates in contact with Characterized by Caterpillar device for moving means. The method of claim 1, wherein the buffer member 211 for buffering the driving wheels 21 to be made as a ball spring having a resilient enough to withstand the weight load and impact force, the balance wheel ( 22) The cushioning member (221) for buffering the relative elasticity is so small that it is made as a ballistic spring suitable for balancing the running trajectory (30) characterized in that the track device for moving means. According to claim 1, Between the operating wheels are installed so as to emerge in the up and down direction by the buffer member 231 in the auxiliary guide passage 13 vertically opened to the top end of the fixed frame 10 of the rolling wheels 21 An endless track device for moving means, characterized in that it comprises an auxiliary rolling wheel (23) mounted to the cloud movement (232). According to claim 1, wherein the running track 30 is a departure prevention projection 31 integrally formed in the center of the inner surface of the driving and balance wheels (21) (22) and the auxiliary wheels (23) And the engaging grooves (21a) (22a) (23a) are engaged so as to be engaged with each other so as to prevent the vehicle from being randomly separated when the driving trajectory (30) rotates.