CN201195477Y

CN201195477Y - Self-locking universal wheel

Info

Publication number: CN201195477Y
Application number: CNU2008200123976U
Authority: CN
Inventors: 吴国祥
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-04-24
Filing date: 2008-04-24
Publication date: 2009-02-18
Anticipated expiration: 2018-04-24

Abstract

The utility model relates to a self-locking universal wheel suitable for installation on a sliding-type swivel chair, which is structurally characterized in that a central transmission rod sleeved with a spring is arranged in a vertical shaft, a control rotary rod with the outer wall distributed with bosses uniformly is arranged above the central transmission rod, wherein the tops of the bosses are provided with slants, the inner wall of a groove sleeve outside the control rotary rod is provided with grooves matching with the bosses on the control rotary rod, a button pipe mouth covering the control rotary rod is provided with a circle of saw-teeth matching with the slants on the tops of the bosses, further corresponding to the saw-teeth, the outer wall at the pipe mouth is provided with bosses which are engaged with the bosses on the control rotary rod and the grooves in the groove sleeve, a pawl engaged with a ratchet is fixed on a pawl shaft, and a spring fixed on a supporting bracket acts on the ratchet. The self-locking universal wheel has small volume, and compared with the existing universal wheel, the appearance of the self-locking universal wheel is barely changed. The utility model has the advantages of simple operation, convenience, and convenient installation and usage, pulleys can be locked or loosened by gently stepping on the button with feet, and the utility model relaxes and frees movement or fixation for furniture.

Description

The self-locking type cardan wheel

Technical field the utility model relates to and is fit to furniture and the equipment that various needs move, and is particularly suitable for a kind of self-locking type cardan wheel that sliding type office revolving chair (being commonly called as executive chair) is installed.

Background technology generally has the furniture and the equipment of cardan wheel, and the cardan wheel of installing on the sliding type swivel chair of the usefulness of particularly handling official business does not all have auto-lock function.In use, be subjected to skew force sometimes and do the time spent, because ground is smooth, swivel chair will produce translation and can't fix.The cardan wheel of the tight device with lock that is equipped with on the portable bedside cupboard that hospital uses also exists " dead point " in the control operation, will up lift with tiptoe when decontroling latching device, operates very inconvenient.

Summary of the invention is for preventing that cardan wheel from producing the plane and moving and easily cardan wheel is locked or unclamp when not needing it to move, and the utility model provides a kind of self-locking type cardan wheel.Structure in its design plan has comprised the support of prior art, vertical shaft, main shaft, pulley, also include the center drive link that is located in the upright axle center hole, be with a spring on drive link top, center, what be provided with above the drive link of center is connected as a single entity by two different-diameter cylinders, it is evenly equipped with vertical boss on the outer wall of large diameter cylinder, the boss top has the control swing arm on inclined-plane, be enclosed within have on the control swing arm exterior inside pipe wall with the control swing arm on the be complementary groove cover of groove of boss, cover on the external mouth of pipe of control swing arm small diameter cylinders and have the sawtooth that a circle matches with control inclined-plane, swing arm boss top, mouth of pipe wall outer with sawtooth corresponding be provided with control swing arm on boss and groove overlap the match button of boss of inner groovy, be located at the ratchet that pawl axis is fixed that passes through of drive link below, center on support, with coaxial with pulley 4, the ratchet that is connected as a single entity, and the spring of on support, fixing that acts on ratchet.The utility model self-locking type cardan wheel volume is little, and the control swing arm of increase, groove cover, button all are located in the existing vertical shaft, and comparing oad with existing cardan wheel does not have great variation; Simple, convenient, gently step on the locking of button pulley with pin, gently step on both tight mechanisms of releasable lock of a knob down once more; Widely applicable, as sofa, desk, bed, cupboard etc., make the easily freedom that moves or fixedly become of furniture; Easy for installation, the M8 bolt that only needs to have the fastening usefulness on the cardan wheel now changes M12 * 1.25 bolts into, and the hole of a ￠ 8 of the processing of the relevant position above bolt.

Appended drawings, be the structural representation of the utility model self-locking type cardan wheel.

The specific embodiment has further understanding for structure, the principle to the utility model self-locking type cardan wheel, and details are as follows in conjunction with embodiment of the present utility model:

Embodiment, the self-locking type cardan wheel.

With reference to accompanying drawing, the structure of the utility model self-locking type cardan wheel has comprised the support 1 among the figure, be located at the vertical shaft 2 in the support 1, on the main shaft 3 of support 1 bottom, fixing pulley 4, a center drive link 5 is housed in the heart hole of vertical shaft 2, drive link 5 tops in center are with spring 6, being provided with one above center drive link 5 is connected as a single entity by two different-diameter cylinders, it is evenly equipped with boss longitudinally on the outer wall of large diameter cylinder, the boss top has the control swing arm 7 on inclined-plane, on the outer inwall that is provided with tubular groove cover 8 of control swing arm 7, have the groove that is complementary with the boss of controlling on the swing arm 7, bottom land has the inclined-plane that matches with control swing arm 7 boss upper inclined surface, cover on and have a circle on the mouth of pipe of controlling the external button 9 of swing arm 7 small diameter cylinders and control the sawtooth that inclined-plane, swing arm 7 boss top matches, mouth of pipe wall outer with sawtooth corresponding be provided with control swing arm 7 on boss and groove overlap the boss that the groove on 8 inwalls matches, below the center drive link 5 be the ratchet of fixing by the pawl axis 10 that is located on the support 1 11, ratchet 12 is coaxial with pulley 4, the side and the pulley 4 that are located at pulley 4 are connected as a single entity, and the spring 13 that acts on ratchet 11 is fixed on the support 1.It is different that groove overlaps the degree of depth of facing two grooves on 8 inwalls mutually, and one dark, and one shallow.

Principle of work: press button 9 downwards, make control swing arm 7 descending and under the ramp effect of groove cover 8 and button 9, rotate, the boss that it is had above enters into that block in the more shallow groove of groove cover 8 can not be up, control simultaneously that swing arm 7 also drives center drive link 5, ratchet 11 is descending, the tight lock state that unclamps ratchet 12 will be lifted on the sour jujube tooth, because pulley 4 is one with ratchet 12, pulley 4 rotates; Touched the button down 9 o'clock again, the slightly descending rotation of control swing arm 7, the boss of its top rotates in the groove cover 8 in dark any groove, center drive link 5 is up under the effect of spring 6, the sour jujube tooth of ratchet 11 falls to pinning ratchet 12, also can't rotate with the pulley 4 of its one, thereby cardan wheel is locked.

Claims

1, a kind of self-locking type cardan wheel, it includes support (1), vertical shaft (2), main shaft (3), pulley (4), it is characterized in that it also includes the center drive link (5) that is located in vertical shaft (2) heart hole, the spring (6) that is overlapping on center drive link (5) top, being connected as a single entity that center drive link (5) top is provided with by two different-diameter cylinders, it is evenly equipped with vertical boss on the large diameter cylinder outer wall, the boss top has the control swing arm (7) on inclined-plane, be enclosed within have on the outer inside pipe wall of control swing arm (7) with control swing arm (7) on the be complementary groove cover (8) of groove of boss, cover on the external mouth of pipe of control swing arm (7) small diameter cylinders and have the sawtooth that a circle matches with control inclined-plane, swing arm (7) boss top, mouth of pipe wall outer with sawtooth corresponding be provided with control swing arm (7) on boss and the match button (9) of boss of the interior groove of groove cover (8), the pawl axis (10) that passes through that is located at center drive link (5) below is gone up fixing ratchet (11) at support (1), with coaxial with pulley (4), and the ratchet that is connected as a single entity (12), and the spring of on support (1), fixing that acts on ratchet (11) (13).

2, self-locking type cardan wheel according to claim 1, the degree of depth that it is characterized in that facing mutually on the groove cover (8) two grooves is different.