CN203835965U - Double-needle roller self-locking needle bearing - Google Patents

Abstract

The utility model discloses a double-needle roller self-locking needle bearing. The double-needle roller self-locking needle bearing comprises an outer ring, an inner ring, needle rollers and a retainer, wherein the retainer is located between the outer ring and the inner ring and provided with a pocket hole, an inner roller way is mounted on the inner surface of the outer ring, an outer roller way is disposed on the outer surface of the inner ring, the inner roller way and the outer roller way coordinate to form a roller way where the needle rollers roll, the two needle rollers are mounted in the pocket hole, and a lock catch structure which can prevent the two needle rollers from falling out is disposed in the pocket hole. According to the double-needle roller self-locking needle bearing, the two needle rollers can be disposed in the pocket hole, the self-locking function of the two needle rollers can be achieved, and the needle bearing has the advantages of stable structure, large bearing capacity and long service life.

Description

The needle bearing of a kind of pair of needle roller self-locking

Technical field

The utility model relates to field of bearings, especially the needle bearing of a kind of pair of needle roller self-locking.

Background technique

Existing needle bearing, point there is the needle bearing of retainer and without two kinds of the needle bearings of retainer, retainer has again two kinds of pressing cage and injection moulding retainers conventionally, wherein, injection moulding retainer is used widely because of its good lubricity, see Fig. 1, in each pocket hole 11 on injection moulding retainer 1, be distributed with a needle roller 2, and separate by crossbeam 12 between 11Yu Dou hole, pocket hole 11, because this crossbeam 12 has certain thickness limits, in the case of the installing space of retainer 1 is limited, can not load more needle roller 2, therefore greatly limited the bearing capacity of this kind of needle bearing.And for the above-mentioned needle bearing without retainer, although this bearing can be installed more needle roller, improve the bearing capacity of bearing, but friction mutually between needle roller and needle roller, produce more heat and noise, and in the situation that not having retainer to support, needle roller is installed and is bothered very much, therefore above-mentioned defect has also limited the application without retainer needle bearing.

The utility model is a kind of improved needle bearing with retainer based on above-mentioned defect.

Model utility content

In order to overcome the deficiencies in the prior art, the utility model provides a kind of flexibility of revolution of common needle bearing and needle bearing without two needle roller self-lockings of the large bearing capacity advantage of retainer needle bearing taken into account.

To achieve these goals, the technical solution adopted in the utility model is: the needle bearing of a kind of pair of needle roller self-locking, comprise outer ring, inner ring, needle roller and retainer, retainer is being provided with pocket hole between outer ring and inner ring and on retainer, inner surface is provided with interior raceway, inner ring outer surface is provided with outer raceway, described interior raceway and outer raceway coordinate the raceway forming for described needle roller rolling, it is characterized in that: 2 described needle rollers are installed in described pocket hole, and described pocket hole has the buckle structure that prevents that 2 needle rollers from dropping out.

As further setting of the present utility model, described pocket hole has 2 subregions, be respectively the first subregion and the second subregion, described 2 subregions interconnect, and the opposite side inwall that the first subregion is communicated with the second subregion relatively has the inner concave arc surface coordinating with described needle roller outer surface, the opposite side inwall that described the second subregion is communicated with the first subregion relatively also has the inner concave arc surface coordinating with described needle roller outer surface, two ends of the inner concave arc surface of described the first subregion respectively with the center of circle in the needle roller cross section in the second subregion between distance equate, and described distance is the first subregion locking width after deducting the radius length in the needle roller cross section that is positioned at the second subregion, two ends of the inner concave arc surface of described the second subregion respectively with the center of circle in the needle roller cross section at the first subregion between distance also equate, and described distance is the second subregion locking width after deducting the radius length in the needle roller cross section that is positioned at the first subregion, described the first subregion locking width is than the little 0.2～0.3mm of needle roller diameter of section of described the second subregion, described the second subregion locking width is than the little 0.2～0.3mm of needle roller diameter of section of the first subregion.

As further setting of the present utility model, the difference of the internal-and external diameter in described retainer cross section is less than described needle roller diameter of section.

Adopt such scheme, the needle bearing of of the present utility model pair of needle roller self-locking is on the basis of common needle bearing, remove the crossbeam between two pocket holes, make circular pocket of the prior art hole become the pocket hole of long-round-shape structure, make can hold 2 needle rollers in this pocket hole, this pocket hole has and can and prevent the buckle structure that needle roller drops for 2 needle roller Free-rollings.First pack when mounted the needle roller of the second subregion into, and this needle roller is being reclined on the inner concave arc surface of retainer pocket hole the second subregion sidewall, the concave side wall cambered surface of then needle roller of the first subregion being pressed close to pocket hole the first subregion packs into, because first subregion in long-round-shape pocket hole locks width than the little 0.2mm of the diameter of the needle roller in the second subregion or 0.3mm or 0.25mm, while packing needle roller into first subregion, need working pressure to be pressed into, in such pocket hole, two needle rollers are just packed into, and two needle rollers form good self-locking structure, can not drop out pocket hole, and between pocket hole and needle roller, leave suitable running clearance, said structure, while packing in the ban the needle roller of the first subregion into, the working principle in the time of the second subregion dress needle roller is the same, the needle bearing of above-mentioned pair of needle roller self-locking had both had the flexibility of revolution of common needle bearing, had advantages of that again to carry power without retainer needle bearing large, this needle bearing has improved 15% than the bearing capacity of common needle bearing, under equal load-up condition, using, compare without having improved 50% the working life of retainer needle bearing its working life, and in working order, the heat that this needle bearing produces is little, and temperature is far below without retainer needle bearing.

Below in conjunction with accompanying drawing, the utility model is further described.

Brief description of the drawings

Accompanying drawing 1 is the cooperating structure schematic diagram of retainer and steel ball in prior art;

Accompanying drawing 2 is the cooperating structure schematic diagram of the utility model specific embodiment retainer and steel ball;

Accompanying drawing 3 is installed the retainer structural representation after the needle roller of the second subregion for the utility model specific embodiment;

Accompanying drawing 4 is installed the retainer structural representation of the needle roller of the first subregion for the utility model specific embodiment;

Accompanying drawing 5 is installed the retainer structural representation after 2 needle rollers for the utility model specific embodiment;

Accompanying drawing 6 is the utility model specific embodiment retainer structural front view;

Accompanying drawing 7 is the utility model specific embodiment retainer structure side view;

Accompanying drawing 8 is the utility model specific embodiment retainer structure plan view.

Embodiment

Specific embodiment of the utility model is the needle bearing of two needle roller self-lockings as shown in Fig. 1-8, comprise outer ring, inner ring, needle roller 4 and retainer 3, retainer 3 is being provided with pocket hole 31 between outer ring and inner ring and on retainer 3, inner surface is provided with interior raceway, inner ring outer surface is provided with outer raceway, the raceway that interior raceway and outer raceway coordinate formation to roll for needle roller 4, is provided with 2 needle rollers 4 in pocket hole 31, pocket hole 31 has the buckle structure that prevents that 2 needle rollers 4 from dropping out.

The buckle structure in above-mentioned pocket hole 31 comprises 2 subregions that are arranged in pocket hole 31, be respectively the first subregion 311 and the second subregion 312,2 subregions interconnect, and the opposite side inwall that the first subregion 311 is communicated with the second subregion 312 relatively has the inner concave arc surface 321 coordinating with needle roller 4 outer surfaces in the first subregion 311, the opposite side inwall that the second subregion 312 is communicated with the first subregion 311 relatively also has the inner concave arc surface 322 coordinating with the needle roller outer surface in the second subregion 312, two ends of the inner concave arc surface 321 of the first subregion 311, be upper end portion 321a and underpart 321b, respectively with the center of circle in needle roller 4 cross sections in the second subregion 312 between distance equate, and this distance (distance between the first end 321b of subregion 311 inner concave arc surfaces 321 and the center of circle in needle roller 4 cross sections of the second subregion 312) is the width L that the first subregion locking width is shown in accompanying drawing 3 after deducting the radius length in needle roller 4 cross sections that are arranged in the second subregion 312, two ends of the inner concave arc surface 322 of the second subregion 312 are upper end portion 322a and underpart 322b, respectively with the center of circle in needle roller 4 cross sections at the first subregion 311 between distance also equate, and this distance (distance between the second end 322b of subregion 312 inner concave arc surfaces 322 and the center of circle in needle roller 4 cross sections of the first subregion 311) is the second subregion locking width after deducting the radius length in needle roller 4 cross sections that are positioned at the first subregion 311, the first subregion locking width is shown in that than little 0.2 mm of the needle roller of the second subregion 312 4 diameter of sections or 0.25mm or 0.3mm(distance in accompanying drawing 4 a), the second subregion locking width is than the needle roller of the first subregion 311 4 diameter of sections (DW in accompanying drawing 3) little 0.2mm or 0.25mm or 0.3mm, the too little meeting of above-mentioned 2 locking width can't lock needle roller 4 because of the nylon material resiliently deformable of retainer 3, if locking width is too large, the difficulty that packs second needle roller 4 into can increase, preferably, needle roller 4 diameter of sections in two subregions are equal, and the first subregion locking width also equates with the second subregion locking width, is convenient to processing and installs.

The difference of the internal-and external diameter in above-mentioned retainer 3 cross sections is less than needle roller 4 diameter of sections (DW in accompanying drawing 3), and the part that needle roller 4 is revealed in outside retainer 3 coordinates with the rolling path rolling between outer ring and inner ring.

The needle bearing of of the present utility model pair of needle roller self-locking is on the basis of common needle bearing, remove the crossbeam between two pocket holes 31, make circular pocket of the prior art hole become the pocket hole 31 of long-round-shape structure, make can hold 2 needle rollers 4 in this pocket hole 31, this pocket hole 31 has and can and prevent the buckle structure that needle roller 4 drops for 2 needle roller 4 Free-rollings.First pack when mounted the needle roller 4 of the second subregion 312 into, and this needle roller 4 is being reclined on the inner concave arc surface 322 of retainer 3 pocket hole 31 second subregion 312 sidewalls, the concave side wall cambered surface 321 of then needle roller of the first subregion 311 4 being pressed close to pocket hole 31 first subregions 311 packs into, because first subregion in long-round-shape pocket hole 31 locks width than the little 0.2mm of diameter or 0.3mm or the 0.25mm of the needle roller 4 in the second subregion 312, while packing needle roller 4 into first subregion 311, need working pressure to be pressed into, in such pocket hole 31, two needle rollers 4 are just packed into, and the diameter sum that the distance between the first subregion 311 inner concave arc surface 321 underpart 321b or upper end portion 321a and the second subregion 312 inner concave arc surface 322 underpart 322b or upper end portion 322a is less than 2 needle rollers 4 makes two needle rollers 4 form good self-locking structure and can not drop out pocket hole 31, but distance between the first subregion 311 inner concave arc surface 321 middle part 321c and the second subregion 312 inner concave arc surface 322 middle part 322c and 2 needle roller 4 diameter sums be equipped with and make to leave suitable running clearance between pocket hole 31 and needle roller 4, said structure, while packing in the ban the needle roller 4 of the first subregion 311 into, the working principle in the time that the second subregion 312 fills needle roller 4 is the same, the needle bearing of above-mentioned pair of needle roller self-locking had both had the flexibility of revolution of common needle bearing, had advantages of that again to carry power without retainer needle bearing large, this needle bearing has improved 15% than the bearing capacity of common needle bearing, under equal load-up condition, using, compare without having improved 50% the working life of retainer needle bearing its working life, and in working order, the heat that this needle bearing produces is little, and temperature is far below without retainer needle bearing.

Claims (3)

1. the needle bearing of two needle roller self-lockings, comprise outer ring, inner ring, needle roller and retainer, retainer is being provided with pocket hole between outer ring and inner ring and on retainer, inner surface is provided with interior raceway, inner ring outer surface is provided with outer raceway, described interior raceway and outer raceway coordinate the raceway forming for described needle roller rolling, it is characterized in that: 2 described needle rollers are installed in described pocket hole, and described pocket hole has the buckle structure that prevents that 2 needle rollers from dropping out.

2. the needle bearing of according to claim 1 pair of needle roller self-locking, it is characterized in that: described pocket hole has 2 subregions, be respectively the first subregion and the second subregion, described 2 subregions interconnect, and the opposite side inwall that the first subregion is communicated with the second subregion relatively has the inner concave arc surface coordinating with described needle roller outer surface, the opposite side inwall that described the second subregion is communicated with the first subregion relatively also has the inner concave arc surface coordinating with described needle roller outer surface, two ends of the inner concave arc surface of described the first subregion respectively with the center of circle in the needle roller cross section in the second subregion between distance equate, and described distance is the first subregion locking width after deducting the radius length in the needle roller cross section that is positioned at the second subregion, two ends of the inner concave arc surface of described the second subregion respectively with the center of circle in the needle roller cross section at the first subregion between distance also equate, and described distance is the second subregion locking width after deducting the radius length in the needle roller cross section that is positioned at the first subregion, described the first subregion locking width is than the little 0.2～0.3mm of needle roller diameter of section of described the second subregion, described the second subregion locking width is than the little 0.2～0.3mm of needle roller diameter of section of the first subregion.

3. the needle bearing of according to claim 1 and 2 pair of needle roller self-locking, is characterized in that: the difference of the internal-and external diameter in described retainer cross section is less than described needle roller diameter of section.