Steel wire rope pulley

Abstract

The utility model discloses a steel wire rope pulley which comprises a main shaft, a hollow shaft is sleeved on the main shaft, a bearing is installed in the middle of the hollow shaft, a pulley body is installed on the bearing, inner flanges are installed on two sides of the pulley body, and first sealing rings are arranged between the inner flanges and the pulley body. A first mounting groove is formed in the inner ring position of the inner flange, an inner friction ring is mounted in the first mounting groove, and a second sealing ring is arranged between the inner friction ring and the groove wall of the first mounting groove; outer flanges are installed at the two ends of the hollow shaft, third sealing rings are arranged between the outer flanges and the hollow shaft, and gaps are formed between the outer flanges and the inner flanges. A second mounting groove is formed in the inner side of the outer flange, the second mounting groove is opposite to the first mounting groove in position, an outer friction ring is mounted in the second mounting groove, a fourth sealing ring is arranged between the outer friction ring and the groove wall of the second mounting groove, and the outer friction ring and the inner friction ring are in mirror surface friction sealing fit. The sealing structure is good in sealing effect, convenient to install and maintain and high in overall stability.

Description

TECHNICAL FIELD

[0001] The utility model relates to pulley technical field especially relates to a steel wire rope pulley. BACKGROUND

[0002] At present, steel wire rope pulley is used in engineering equipment such as grab bucket and piling hole machine, and the existing steel wire rope pulley is polluted by dust, dust, oil stains or moisture in the environment in the bearing cavity during use, which greatly affects the service life of the pulley.

[0003] With the progress of technology, the sealing structure is gradually added on both sides of the bearing of the pulley. Referring to Chinese patent document CN111365363A, a sealed pulley is disclosed, which comprises a pulley body, a bearing sleeved on a pulley shaft, a sealing assembly and a dirt scraping plate, the bearing is embedded in the pulley body, the sealing assembly is arranged at the junction of the pulley body, the bearing and the pulley shaft, the sealing assembly is composed of a dynamic sealing cover, an oil baffle and a static sealing cover, the dynamic sealing cover is fixedly connected with the pulley body, the inner side of the static sealing cover is fixedly connected with the bearing, the oil baffle is arranged between the dynamic sealing cover and the static sealing cover, the cavity between the oil baffle, the dynamic sealing cover and the static sealing cover is filled with sealing grease, and the outer side of the static sealing cover is fixed with the dirt scraping plate.

[0004] However, the patent document CN111365363A still has the following technical problems: 1) the sealing effect is still not good enough, since there is no sealing mechanism between the pulley body and the dynamic sealing cover, and there is no sealing mechanism between the pulley shaft and the static sealing cover, and the oil baffle is suspended between the dynamic sealing cover and the static sealing cover, which does not achieve complete sealing, therefore, there is still the problem of oil leakage, and the sealing effect is not good enough; 2) it is not convenient to install the pulley body, the bearing and the sealing assembly on the pulley shaft, since the pulley body, the bearing and the sealing assembly are directly installed on the pulley shaft, therefore, when the length of the pulley shaft is relatively long, it is difficult to stably install the pulley body, the bearing and the sealing assembly on the pulley shaft; 3) the pulley body is not laterally supported, and the overall stability is not strong enough, which is difficult to adapt to high-strength working environment. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problem, in view of the above-mentioned prior art, provide a kind of steel wire rope pulley with good sealing effect, it is convenient to install and maintain, and the overall stability is strong.

[0006] The utility model discloses a steel wire rope pulley, including spindle, the hollow shaft is sleeved on the spindle, and the bearing is installed on the middle part of hollow shaft, and the pulley main body is installed on the bearing, and the both sides of pulley main body are installed with the inner flange respectively, and is equipped with first sealing washer between the inner flange and pulley main body, the inner ring position of inner flange is equipped with first installation slot, and the inner friction ring is installed in first installation slot, and is equipped with second sealing washer between the inner friction ring and the groove wall of first installation slot, the both ends of hollow shaft are installed with outer flange respectively, and is equipped with third sealing washer between the outer flange and hollow shaft, and the clearance between outer flange and inner flange has, the inner side of outer flange is equipped with second installation slot, and the position of second installation slot is opposite to first installation slot, and the outer friction ring is installed in second installation slot, and is equipped with fourth sealing washer between the outer friction ring and the groove wall of second installation slot, and the mirror surface friction sealing cooperation between outer friction ring and inner friction ring.

[0007] In the above technical scheme, the hollow shaft, bearing, pulley main body, inner flange, inner friction ring, outer flange, outer friction ring, first sealing washer, second sealing washer, third sealing washer and fourth sealing washer are mutually surrounded to form a sealed cavity, and the sealed cavity is filled with lubricating oil.

[0008] In the above technical scheme, the bearing is a cylindrical needle bearing, the bearing includes an outer ring, an inner ring and cylindrical needles installed between the outer ring and the inner ring, the pulley main body is installed on the outer ring of the bearing, and the inner side of the inner flange abuts against the side of the outer ring of the bearing, the hollow shaft is further provided with a positioning ring, the inner side of the positioning ring abuts against the side of the inner ring of the bearing, and the outer side of the positioning ring abuts against the inner side of the outer flange.

[0009] In the above technical scheme, the both ends of the hollow shaft are further screwed with nuts, the inner side of the nut abuts against the outer side of the outer flange to lock or loosen the outer flange.

[0010] In the above technical scheme, the hollow shaft is provided with a first annular mounting position for mounting the bearing and the positioning ring, a second annular mounting position for mounting the outer flange and a third annular mounting position for screwing the nut, the diameter of the first annular mounting position is greater than the diameter of the second annular mounting position, and the diameter of the second annular mounting position is greater than the diameter of the third annular mounting position, and the both ends of the spindle are respectively provided with brackets.

[0011] In the above technical scheme, the outer ring position of the pulley main body is provided with a U-shaped groove for winding the steel wire rope.

[0012] In the above technical scheme, a plurality of position-opposed pin holes and screw holes are arranged between the pulley main body and the inner flange, a positioning pin is arranged in the pin hole, and a positioning bolt is arranged in the screw hole.

[0013] In the technical scheme, the first sealing ring, the second sealing ring, the third sealing ring and the fourth sealing ring are nitrile rubber sealing rings.

[0014] In the technical scheme, the inner friction ring and the second sealing ring are elastically interference fitted, the groove wall of the first mounting groove and the second sealing ring are elastically interference fitted, the outer friction ring and the fourth sealing ring are elastically interference fitted, and the groove wall of the second mounting groove and the fourth sealing ring are elastically interference fitted.

[0015] The utility model discloses the beneficial effect is: (1) the utility model discloses because the first sealing ring is established between the inner flange and the pulley main body, the second sealing ring is established between the inner friction ring and the groove wall of first mounting groove, the third sealing ring is established between the outer flange and the hollow shaft, the fourth sealing ring is established between the outer friction ring and the groove wall of second mounting groove, and the outer friction ring and the inner friction ring are mirror surface friction sealed cooperation, therefore, the utility model discloses each static connection position is realized good sealing through the sealing ring, and the dynamic contact position side realizes good dynamic sealing through mirror surface friction sealed cooperation, thereby makes the utility model discloses the whole sealing effect is very excellent, (2) the utility model discloses because the hollow shaft is sleeved on the main shaft, and the bearing, the outer flange are installed on the hollow shaft, and the pulley main body is installed on the bearing, and the inner flange is installed on the both sides of pulley main body, and the inner friction ring is installed on the inner flange, and the outer friction ring is installed on the outer flange, therefore, compared with the pulley of prior art that does not set up the hollow shaft, the installation and maintenance of each component of the utility model are relatively easy, (3) the utility model discloses because the inner flange is installed on the both sides of pulley main body, the first installation groove of inner flange installs the inner friction ring, and the outer flange is installed on the both ends of hollow shaft, and the second installation groove of outer flane installs the outer friction ring, and the outer friction ring and the inner friction ring are mirror surface friction sealed cooperation, therefore, the both sides of pulley main body can be laterally supported by the inner flange, and the inner flange can be supported by the outer flange under the action of the outer friction ring and the inner friction ring, thereby making the overall stability of the utility model is strong. ACCURACY OF DRAWINGS

[0016] Figure 1 It is the overall structural drawing of the utility model.

[0017] Figure 2 It is the front structure drawing of the utility model.

[0018] Figure 3 It is the dispersion structure drawing of the utility model.

[0019] Figure 4 It is the section view along Figure 2 A-A line. DETAILED DESCRIPTION

[0020] The structural principle and working principle of the utility model will be explained in further detail below in combination with the drawings.

[0021] As Figures 1-4 shown, the utility model is a kind of steel wire rope pulley, including main shaft 1, the hollow shaft 2 is sleeved on the main shaft 1, the bearing 3 is installed on the middle part of hollow shaft 2, the pulley main body 4 is installed on the bearing 3, the inner flange 5 is respectively installed on the both sides of pulley main body 4, and first sealing ring 6 is equipped between inner flange 5 and pulley main body 4;First installation groove 51 is equipped in the inner ring position of inner flange 5, and inner friction ring 7 is installed in first installation groove 51, and second sealing ring 8 is equipped between the groove wall of inner friction ring 7 and first installation groove 51;The outer flange 9 is respectively installed on the both ends of hollow shaft 2, and third sealing ring 10 is equipped between outer flange 9 and hollow shaft 2, and gap is between outer flange 9 and inner flange 5;Second installation groove 91 is equipped in the inner side of outer flange 9, and the position of second installation groove 91 is opposite to first installation groove 51, and outer friction ring 11 is installed in second installation groove 91, and fourth sealing ring 12 is equipped between the groove wall of outer friction ring 11 and second installation groove 91, and outer friction ring 11 and inner friction ring 7 are sealed and cooperated by mirror surface friction.The utility model is because of being equipped with first sealing ring 6 between inner flange 5 and pulley main body 4, being equipped with second sealing ring 8 between the groove wall of inner friction ring 7 and first installation groove 51, being equipped with third sealing ring 10 between outer flange 9 and hollow shaft 2, being equipped with fourth sealing ring 12 between the groove wall of outer friction ring 11 and second installation groove 91, and outer friction ring 11 and inner friction ring 7 are sealed and cooperated by mirror surface friction, therefore, the good sealing of each static connection position of the utility model is realized by sealing ring, and the good dynamic sealing of dynamic contact position side is realized by mirror surface friction sealing cooperation, so that the overall sealing effect of the utility model is very excellent;The installation and maintenance of each component of the utility model are relatively easy;The both sides of pulley main body 4 of the utility model can be laterally supported by inner flange 5, and inner flange 5 can be supported by outer flange 9 under the action of outer friction ring 11 and inner friction ring 7, so that the overall stability of the utility model is strong.

[0022] As Figure 3 and Figure 4As shown in the figure, the hollow shaft 2, bearing 3, pulley body 4, inner flange 5, inner friction ring 7, outer flange 9, outer friction ring 11, first sealing ring 6, second sealing ring 8, third sealing ring 10 and fourth sealing ring 12 form a sealed cavity 13 together, and the sealed cavity 13 is filled with lubricating oil. The bearing 3 is a cylindrical needle bearing, which comprises an outer ring 31, an inner ring 32 and cylindrical needles 33 installed between the outer ring 31 and the inner ring 32. The pulley body 4 is installed on the outer ring 31 of the bearing 3, and the inner side of the inner flange 5 abuts against the side of the outer ring 31 of the bearing 3. The hollow shaft 2 is further provided with a positioning ring 14, the inner side of which abuts against the side of the inner ring 32 of the bearing 3, and the outer side of the positioning ring 14 abuts against the inner side of the outer flange 9. The hollow shaft 2 is further provided with nuts 15 on both ends, the inner side of which abuts against the outer side of the outer flange 9 to lock or loosen the outer flange 9.

[0023] As shown in the figure, Figure 3 and Figure 4 The hollow shaft 2 is provided with a first annular mounting position 21 for mounting the bearing 3 and the positioning ring 14, a second annular mounting position 22 for mounting the outer flange 9 and a third annular mounting position 23 for mounting the nuts. The diameter of the first annular mounting position 21 is larger than that of the second annular mounting position 22, and the diameter of the second annular mounting position 22 is larger than that of the third annular mounting position 23. The both ends of the main shaft 1 are respectively provided with supports 18. By providing the first annular mounting position 21, the second annular mounting position 22 and the third annular mounting position 23, the components can be installed more easily and stably. By providing the supports 18, the main shaft 1 of the pulley can be installed on external equipment, such as a grab bucket, a pile hole machine and other engineering equipment.

[0024] As shown in the figure, Figures 1-4 The outer ring position of the pulley body 4 is provided with a U-shaped groove 41 for winding the steel wire rope.

[0025] As shown in the figure, Figure 3 The pulley body 4 and the inner flange 5 are provided with a plurality of opposite pin holes 16 and screw holes 17, the pin holes are provided with positioning pins, and the screw holes are provided with positioning bolts. In this way, the pulley body 4 and the inner flange 5 can be stably assembled together.

[0026] As shown in the figure, Figure 3 and Figure 4 The first sealing ring 6, the second sealing ring 8, the third sealing ring 10 and the fourth sealing ring 12 are all nitrile rubber sealing rings. The inner friction ring 7 and the second sealing ring 8 are in elastic interference fit, the groove wall of the first mounting groove 51 and the second sealing ring 8 are in elastic interference fit, the outer friction ring 11 and the fourth sealing ring 12 are in elastic interference fit, and the groove wall of the second mounting groove 91 and the fourth sealing ring 12 are in elastic interference fit.

[0027] The above is only the preferred embodiment of the present application, and any slight modification, equivalent change and modification made to the above embodiment according to the technical scheme of the present application are within the scope of the technical scheme of the present application.

Claims

1. A steel cable pulley characterized by: The utility model provides a kind of main shaft, the hollow shaft is sleeved on the main shaft, bearing is installed on the middle part of hollow shaft, pulley body is installed on the bearing, inner flange is installed on the both sides of pulley body, and first sealing ring is equipped between inner flange and pulley body;The inner ring position of the inner flange is equipped with first installation groove, and inner friction ring is installed in first installation groove, and second sealing ring is equipped between the groove wall of first installation groove and inner friction ring;Outer flange is installed on the both ends of hollow shaft, third sealing ring is equipped between outer flange and hollow shaft, and gap is between outer flange and inner flange;The inner side of the outer flange is equipped with second installation groove, and the position of second installation groove is opposite to first installation groove, and outer friction ring is installed in second installation groove, and fourth sealing ring is equipped between the groove wall of second installation groove and outer friction ring, and outer friction ring and inner friction ring are mirror surface friction sealed cooperation.

2. The steel wire rope pulley of claim 1, wherein: The hollow shaft, bearing, pulley body, inner flange, inner friction ring, outer flange, outer friction ring, first sealing ring, second sealing ring, third sealing ring and fourth sealing ring are mutually surrounded to form a sealed cavity, and the sealed cavity is filled with lubricating oil.

3. The steel wire rope pulley of claim 1, wherein: The bearing is cylindrical needle bearing, the bearing includes outer ring, inner ring and cylindrical needle installed between outer ring and inner ring, the pulley body is installed on the outer ring of bearing, and the inner side of inner flange is in abutment with the side portion of outer ring of bearing;Positioning ring is also installed on the hollow shaft, the inner side of positioning ring is in abutment with the side portion of inner ring of bearing, and the outer side of positioning ring is in abutment with the inner side of outer flange.

4. The steel wire rope pulley of claim 1, wherein: Nut is also screwed on the both ends of hollow shaft, and the inner side of nut is in abutment with the outer side of outer flange to lock or loosen outer flange.

5. The steel wire rope pulley of claim 4, wherein: The hollow shaft is equipped with first annular mounting site for installing bearing and positioning ring, second annular mounting site for installing outer flange and third annular mounting site for screwing nut, the diameter of first annular mounting site is greater than the diameter of second annular mounting site, and the diameter of second annular mounting site is greater than the diameter of third annular mounting site;The both ends of main shaft are respectively installed with support.

6. The steel wire rope pulley of claim 1, wherein: The outer ring position of pulley body is equipped with U-shaped groove for winding steel wire rope.

7. The steel wire rope pulley of claim 1, wherein: The pulley body and inner flange are equipped with a plurality of position-opposed pin holes and screw holes, positioning pin is inserted in pin hole, and positioning bolt is arranged in screw hole.

8. The steel wire rope pulley of claim 1, wherein: The first sealing ring, second sealing ring, third sealing ring and fourth sealing ring are respectively nitrile rubber sealing ring.

9. The steel wire rope pulley of claim 1, wherein: The inner friction ring and second sealing ring are elastically interference fitted, the groove wall of first installation groove and second sealing ring are elastically interference fitted, the outer friction ring and fourth sealing ring are elastically interference fitted, and the groove wall of second installation groove and fourth sealing ring are elastically interference fitted.

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