TWM572413U - Positioning structure for bearing of small air compressor - Google Patents

Abstract

The present invention provides a positioning structure of a bearing of a small air compressor, which is pressed by a punching tool to the top end of the shaft which is located in the inner wheel of the bearing and protrudes from the outer surface of the bearing, so that the top end of the shaft is pushed Squeeze and bend out an outer lip so that the bearing can be firmly positioned by the expansion of the lip and the close clamping of the ring. When the small air compressor is operated, the shaft of the gear of the transmission mechanism The rod directly clamps the bearing tightly, so that the transmission mechanism does not cause loosening of the positioning of the shaft and the bearing during operation, but in the case of loosening, the inner shaft of the transmission shaft and the second positioning hole bearing will be caused. Rubbing against each other and causing damage, resulting in reduced service life.

Description

Positioning structure of bearings for small air compressors

The present invention is a positioning structure of a bearing of a small air compressor, in particular, a stamping tool is used to punch a top end of a shaft which is located in the inner wheel of the bearing and protrudes from the outer surface of the bearing, so that the top end of the shaft is subjected to Pushing and bending out an outer lip, so that the bearing can be firmly positioned by the expansion of the lip and the close clamping of the ring.

Referring to the tenth and eleventh drawings, a conventional in-vehicle air compressor 1 is shown. The air compressor 1 includes a base 11, a cylinder 12 coupled to the base, and assembled on the base. A motor 13 and a piston body 14 that can be reciprocated within the cylinder 12 by the motor 13. The piston body 14 is reciprocated in the cylinder 12 by the motor 13 to complete the suction, compression, and discharge of pressurized gas.

In general, the motor 13 of the conventional vehicle air compressor 1 drives the piston body 14 to reciprocate by the transmission of a gear mechanism 15 and a crank mechanism. The gear mechanism 15 includes a first gear (priming gear) 15 mounted on the spindle 13 of the motor 13 and a second gear (driven gear) 152 meshing with the first gear 15, and the crank mechanism includes a gravity block 161. A shaft 162 and a connecting rod 164, one end of the shaft 162 passes through the second gear 152 and is mounted in a shaft hole 110 provided in the base 11, and a bearing 111 or a metal sleeve is usually disposed in the shaft hole 110. 112 (refer to both the eighth and ninth drawings), the bearing 111 is of a full circular shape, and the shaft 162 of the crank mechanism is locked to the bearing 111 by a screw 17, as shown in the ninth and tenth views, or The shaft 162 of the crank mechanism disposed in the metal sleeve 112 disposed in the shaft hole 110 is fastened by a fixing buckle 18, as shown in the eighth figure, and one end of the connecting rod 164 is pivotally disposed on the piston body 14. The circular hole 143 in one end 142 of the piston rod 141 is eccentric with respect to the shaft 162. When the second gear 152 is driven by the first gear 15, the piston body 14 reciprocates in the cylinder 12. motion.

However, in the process of reciprocating the piston body 14 of the conventional vehicle air compressor 1 in the cylinder 12, deformation motion is often generated, which affects the efficiency of the air compressor and reduces the service life of the air compressor. After intensive research by the creator, one of the reasons was that the pedestal 11 of the conventional plastic material was slightly softened due to the high temperature, so when the piston body 14 reciprocates at a high frequency, the piston rod 141 and the bearing of the piston body 14 In the case where the 111 is engaged with each other, in the case where the shaft 162 and the bearing 111 are locked by a screw 17, the male thread 171 of the screw 17 and the female thread 163 of the shaft 162 are often combined by the screw. The depth is not enough or the torque of the locking screw 17 is insufficient, causing the shaft 162 to loosen in the radial direction of the inner wheel of the bearing 111, and even causing idling, and the crank in the metal sleeve 112 is fastened by the fixing buckle 18. The ring groove 165 of the shaft 162 of the mechanism can also be detached or loosened under the long-term use, and the shaft 162 can be combined with the bearing 111 or the metal sleeve 112 by the screw 17 or the fixing buckle 18. When the piston body 14 reciprocates at a high frequency, the shaft hole 110 and the bearing 111 are slightly offset and deformed, and the wall surface around the shaft hole 110 is increased by the side wall of the second gear 152 of the gear mechanism 15 to cause mutual friction. live The body 14 is then offset and the piston head 144 is unable to maintain a vertical movement in the cylinder 12, with a slight angling, such that when the piston body 14 is reciprocating, the inner wall of the shaft bore 110 in which the shaft 162 is mounted is subject to The force is uneven and wear is formed at a certain point first, and when the shaft hole 110 is worn, the rotation of the shaft 162 (as indicated by the symbol A in FIG. 11) forms a movement of the non-fixed center, once the phenomenon occurs. The rotation of the link 164 (as indicated by reference numeral C in FIG. 11) also deforms as the piston head 144 of the piston body 14 reciprocates within the cylinder 12 as a result of the non-circular movement. The movement (as indicated by the dashed line in Fig. 12) causes the piston head 144 of the piston body 14 and the bearing 111 in the shaft hole 110 to be easily broken and the life is lowered.

The main purpose of the present invention is to provide a positioning structure for a bearing of a small air compressor, which is stamped on the top end of a shaft in an inner wheel of a bearing by a punching tool, and the top end of the shaft is bent and bent out. An externally expanded lip allows the bearing to be securely positioned by the expansion of the lip and the close clamping of the ring.

In order to understand the structure of the creation in more detail, please refer to the first and second figures. The present invention provides a positioning structure of a bearing 6 of a small air compressor 2, which includes a base 3, A cylinder 4 coupled to the base 3 and a transmission mechanism assembled to the base 3.

The base 3 has a first positioning hole 31 and a second positioning hole 32. The first positioning hole 31 has a pinion gear (not shown in the prior art) disposed at the core end of the power motor. A bearing 6 is mounted in the positioning hole 32. The bearing 6 is composed of an outer wheel 61, an inner wheel 62 and a plurality of balls 63 located between the inner wheel 62 and the outer wheel 61.

The cylinder 4 can be coupled to the base 3 integrally or by a connection technology. The cylinder 4 is connected with a gas storage seat 41 and a manifold 411, 412 for outputting gas. The manifolds 411 and 412 can be connected for transmission. Hose, a safety valve or a pressure gauge.

The transmission mechanism includes a gear 51 having a weight, the gear 51 is engageable with the aforementioned pinion (not shown in the prior art), and the gear 51 is provided with a shaft 52 and a link 53. The two ends of the shaft 52 are cylindrical bodies of different calibers, and a stepped ring 521 is formed between the two ends. The larger diameter end of the shaft 52 has a downwardly recessed notch 522. The end of the shaft 52 of the notch 522 is disposed on the gear 51, and the other end of the smaller diameter of the shaft 52 has a circular top end surface 523, and a groove 524 is formed at the center of the top end surface 523 of the shaft 52. .

Referring to the second, third, fifth and sixth figures, the positioning method of the bearing 6 of the present invention uses one end of the smaller diameter shaft 52 to pass through the inner wheel 62 of the bearing 6 of the second positioning hole 32 and Extending from the outer surface of the bearing 6, the ring 521 of the shaft 52 can be in contact with the bearing 6, and then stamped on the top of the shaft 52 in the inner wheel 62 of the bearing 6 by a punching tool 7 The top end of the shaft 52 is pushed and bent to form an outer lip 525, so that the bearing 6 can be firmly positioned by the close clamping of the outer lip 525 and the ring 521 of the shaft 52.

Referring to the fourth figure, the stamping tool 7 has a top pressing head 71. The top plane 72 of the top pressing head 71 is provided with a central recess 73 at a centrally tapered shape, that is, a central recess 73 and A tapered cone wall 74 is formed between the top plane 72, and the central recess 73 extends upwardly beyond the height of the top plane 72. The radial diameter A of the lug 75 is greater than the recess 524 of the shaft 52. The radial diameter B, as shown in the fifth figure, when the pressing head 71 of the stamping tool 7 is punched on the top end surface 523 of the shaft 52, the protruding pin 75 of the stamping tool 7 is located on the shaft 52. The groove 524 (refer to the seventh figure at the same time) and has the effect that the lug 75 has a radial riveting force F applied to the groove 524 of the shaft 52, and the top end surface 523 of the shaft 52 is subjected to the stamping tool 7 The central recess 73 is pushed to produce a bending deformation, and the top end surface 523 of the bent shaft 52 is in contact with the tapered cone wall 74 of the stamping tool 7, and the groove wall surface at the upper end of the groove 524 of the shaft 52 is subjected to The central recess 73 of the stamping tool 7 is pushed to form an inner curved wall 527, and the outer end of the outer periphery of the shaft 52 is formed with an outer buckle wall 526 which is fastened to the inner wheel 62 of the bearing 6. The shaft 52 The top surface 523, inner wall 527 and outer curved wall 526 snap together to form outer lines expand the lip 525.

When the small air compressor 2 is operated, the shaft 52 of the gear 51 of the transmission mechanism directly clamps the bearing 6 tightly, so that the positioning of the shaft 52 and the bearing 6 is not loosened during the operation of the transmission mechanism, Loose, it is not easy to cause the bearing 6 in the second positioning hole 32 to be broken, and the piston head is indirectly held in the cylinder 4 to perform an optimum state of reciprocating linear motion.

In view of the foregoing, the present invention provides a positioning structure of a bearing 6 of a small air compressor 2, which is stamped by a punching tool 7 at the top end of a shaft 52 located in the inner wheel 62 of the bearing 6, allowing the shaft 52 to be closed. The top end is pushed to bend an outer lip 525, so that the lug 75 of the stamping tool 7 has the effect of applying a radial riveting force F to the groove 524 of the shaft 52, so that the bearing 6 can be driven by the shaft The rod 52 has a close clamping of the lip 525 and the ring 521 for secure positioning.

(1)‧‧‧Air compressor

(11) ‧ ‧ pedestal

(110)‧‧‧Axis hole

(111)‧‧‧ Bearings

(112)‧‧‧Metal sleeve

(12) ‧‧ ‧ cylinder

(13)‧‧‧Motor

(131)‧‧‧ mandrel

(14)‧‧‧ piston body

(141)‧‧‧Piston rod

(142) ‧ ‧ end

(143)‧‧‧ round holes

(144)‧‧‧ piston head

(15)‧‧‧ Gear mechanism

(15)‧‧‧First gear

(152) ‧‧‧second gear

(161)‧‧‧Gravity block

(162)‧‧‧ shaft

(163)‧‧‧Female thread

(164)‧‧‧ linkage

(165)‧‧‧ Ring groove

(17)‧‧‧ screws

(171)‧‧‧A male thread

(18) ‧ ‧ fixed buckle

(2) ‧‧‧Air compressor

(3) ‧ ‧ pedestal

(31)‧‧‧First positioning hole

(32)‧‧‧Second positioning hole

(4) ‧‧‧ cylinder

(41)‧‧‧ gas storage seat

(411) (412) ‧‧‧Management

(51)‧‧‧ Gears

(52)‧‧‧ shaft

(521)‧‧‧垣

(522) ‧ ‧ gap

(523) ‧ ‧ top surface

(524) ‧‧‧ Groove

(525)‧‧‧Extended lip

(526) ‧ ‧ outer buckle wall

(527) ‧ ‧ inner curved wall

(53)‧‧‧ Connecting rod

(6) ‧ ‧ bearing

(61) ‧ ‧ outer wheel

(62) ‧ ‧ inner wheel

(63)‧‧‧ balls

(7)‧‧‧Pressing tools

(71)‧‧‧Top head

(72) ‧‧‧ top plane

(73)‧‧‧Center groove

(74)‧‧‧Bevel wall

(75) ‧ ‧ ‧ sales

(F)‧‧‧radial riveting force

First figure: A perspective view of the bearing positioning structure of the small air compressor of the present invention. Second picture: An exploded view of the bearing positioning structure of the small air compressor of the present invention. The third picture: the bearing positioning drawing of this creation. The fourth picture is a perspective view of the structure of the creation of this creation. Figure 5: A cross-sectional plan view of the bearing of the small air compressor of this creation that has not yet been positioned. Figure 6: A cross-sectional plan view of the bearing positioning of the small air compressor of the present invention. Figure 7: A partial enlarged view of the sixth figure. Figure 8: An exploded view of the components of a conventional air compressor. Figure IX: An exploded view of the components of another conventional air compressor. Figure 10: An exploded view of the components of another conventional air compressor. Figure 11: A plan view of the tenth figure, showing the movement state of the piston rod in an imaginary line. Twelfth figure: A schematic diagram showing the rotational motion of the shaft and the connecting rod of the eleventh figure.

Claims (5)

A positioning structure of a bearing of a small air compressor, the air compressor comprising: a base having a first positioning hole and a second positioning hole which are spaced apart, and the first positioning hole is provided with a through hole a pinion gear of the core end of the power motor is provided with a bearing in the second positioning hole, the bearing is composed of an outer wheel, an inner wheel and a plurality of balls located between the inner wheel and the outer wheel; The ground is connected to the base by a connection technology, and a gas storage seat and a manifold for outputting gas are connected to the cylinder; a transmission mechanism includes a gear having a weight, and the gear train can be combined with the foregoing The pinion gear is meshed with a shaft rod and a connecting rod. The two ends of the shaft rod are cylindrical bodies of different calibers, and a stepped ring is formed between the two, which is characterized by: The outer end of the shaft is formed with an outer lip, so that the bearing can be firmly positioned by the outer lip of the shaft and the tight clamping of the ring. The positioning structure of the bearing of the small air compressor according to the first aspect of the invention, wherein the two ends of the shaft are cylindrical bodies of different calibers, and the stepped ring is formed between the two. One end of the larger diameter of the shaft has a downwardly recessed notch, and the end of the notched shaft is disposed on the gear, and the other end of the smaller diameter of the shaft has a round top end surface. A groove is formed in the center of the top end of the rod. The positioning structure of the bearing of the small air compressor according to the second aspect of the invention, wherein the one end of the smaller diameter shaft passes through the inner wheel of the bearing of the second positioning hole and protrudes outside the bearing The surface allows the shaft of the shaft to resist the bearing. The positioning structure of the bearing of the small air compressor according to the second aspect of the invention, wherein the bearing is stamped on the top end of the shaft in the inner wheel of the bearing by a stamping tool, the stamping system having a top pressing head, the top plane of the top pressing head is provided with a central groove at a centrally tapered shape, that is, a tapered cone wall is formed between the central groove and the top plane, and the central groove extends upwardly beyond The top plane height of the bump, when the top of the stamping tool When punching on the top end surface of the shaft, the protruding pin of the stamping tool is located in the groove of the shaft, and the top end surface of the shaft is pushed by the central groove of the stamping tool to cause bending deformation, and after the bending The top surface of the shaft is in contact with the inclined cone wall of the stamping tool, and the groove wall surface at the upper end of the groove of the shaft is pushed by the central groove of the stamping tool to form an inner curved wall, and the upper end of the outer periphery of the shaft Then, an outer buckle wall is formed to fasten the inner wheel of the bearing, and the top end surface, the inner curved wall and the outer buckle wall of the shaft jointly form the outer expansion lip. The positioning structure of the bearing of the small air compressor of the fourth aspect of the invention, wherein the radial diameter of the protruding pin of the punching tool is larger than the radial diameter of the groove of the shaft, so that the punching tool When the top pressing head is pressed on the top end surface of the shaft, the protruding pin of the stamping tool is located in the groove of the shaft and the convex pin has the effect of applying a radial riveting force to the groove of the shaft.