CN207617423U - A kind of bottom flatcar roll wheel assembly and its special installs fixture - Google Patents

Abstract

The utility model discloses a bottom flat car roller assembly and its special installation fixture, which belongs to the field of mechanical assembly tools and aims to provide a bottom that can improve the assembly precision of the roller bearing and prolong the service life of the bottom flat car roller The key points of the technical scheme of the flat car roller assembly and its special installation fixture are: it includes a roller body and a bearing, the roller body is coaxially provided with a bearing installation hole and a reserved hole, and the bearing is adapted to the bearing installation hole. The two end faces of the roller body are respectively provided with a number of positioning holes, the axial direction of the positioning holes is parallel to the axial direction of the bearing installation hole; the two ends of the bearing installation hole are coaxially provided with flared openings, The radius gradually decreases from the upper surface of the roller body to the bearing installation hole and forms a first guiding slope.

Description

A flat car roller assembly and its special installation fixture

technical field

The utility model relates to a mechanical assembly tool, in particular to a roller assembly of a flat car and a special installation fixture thereof.

Background technique

The bottom flat car is the supporting and running mechanism of the horizontal pull gate, which plays a very important role in the operation of the horizontal pull gate. The service life of the bottom flat car directly affects the normal operation of the gate. According to the damage causes of the flat car in the past, most of them are caused by the damage of the bearings in the rollers, so the quality of the bearing assembly determines the service life of the flat car.

The Chinese patent with the publication number CN204828329U discloses a roller bearing press-fitting fixture, which includes a body on which an indenter, a limiting platform and a set column are arranged in sequence, and the indenter is used to undertake pressure application equipment; the limiting platform is used for Abut against the side wall of the outer ring of the roller bearing; the set column is sleeved in the roller assembly of the roller bearing, and the roller assembly includes the cage of the roller bearing and the rollers arranged on the cage; it also includes an elastic ring , the elastic ring is overlaid on the set post.

In this roller bearing press-fitting jig, the indenter is used to accept the pressure application equipment, the limit table is used to contact the side wall of the outer ring of the roller bearing, the sleeve column is sleeved in the roller assembly of the roller bearing, and the sleeve column There is an elastic ring on the upper part. When the roller assembly is set on the set column, the elastic ring limits the radial movable space of the roller assembly, so that the bearing is not easy to be damaged by the roller bearing pressing tool during assembly. However, when the fixture is When the bearing is pressed into the roller, whether the bearing can be pressed in smoothly and accurately will further affect the quality of the bearing and the service life of the roller.

Utility model content

The first purpose of the present utility model is to provide a roller assembly for a flatbed car, which has the advantages of improving the assembly accuracy of the roller bearings and prolonging the service life of the rollers of the flatbed car.

The above-mentioned technical purpose of the utility model is achieved through the following technical solutions: a roller assembly of a flat car, including a roller body and a bearing, the roller body is coaxially provided with a bearing installation hole and a reserved hole, and the bearing Adapted to the bearing installation hole, a number of positioning holes are respectively opened on the two end surfaces of the roller body, and the axial direction of the positioning hole is parallel to the axial direction of the bearing installation hole;

Both ends of the bearing installation hole are coaxially provided with flaring openings, the radius of which expands gradually decreases from the upper surface of the roller body to the bearing installation hole and forms a first guiding slope.

By adopting the above technical scheme, the bearing is installed in the bearing installation hole of the roller body through a special installation fixture, the positioning hole and the installation fixture cooperate with each other to position the installation fixture, and the first guide slope plays a guiding role in the bearing installation process , when the bearing and the bearing mounting hole cooperate with each other, when the bearing is installed into the bearing mounting hole by a special mounting fixture, if there is a slight misalignment between the bearing and the bearing mounting hole, the bearing can slide into the bearing mounting hole along the first guiding slope, thus effectively The bearing damage caused by the rigid contact between the bearing and the roller body is reduced, thereby effectively improving the assembly accuracy of the roller bearing and prolonging the service life of the roller of the flat car.

Further, the connection between the first guide slope and the end of the bearing installation hole is in a circular arc transition.

By adopting the above technical solution, the connection between the first guiding slope and the bearing installation hole has a circular arc transition, which further improves the guiding and protecting effect of the guiding slope on the bearing.

Further, the surface of the first guide slope is provided with a wear-resistant layer.

By adopting the above technical solution, the wear-resistant layer protects the flaring and reduces the damage to the roller body during the bearing installation process, thereby prolonging the service life of the rollers of the flat car.

The second purpose of the utility model is to provide a special installation fixture for the roller assembly of the flat car, which has the advantages of improving the assembly accuracy of the roller bearings and prolonging the service life of the rollers of the flat car.

The above-mentioned technical purpose of the utility model is achieved through the following technical solutions:

A special installation fixture for the roller assembly of a flat car, comprising a pressing bar body and a base, the pressing bar body including an integrally formed pressing head, a limit platform and a set column, the height of the set column is smaller than the height of the bearing, the base A number of positioning columns corresponding to the positioning holes are fixed on the top surface, and a second guiding slope adapted to the first guiding slope is provided on the end surface of the limiting platform.

By adopting the above technical scheme, the positioning column corresponds to the positioning hole, which acts as a limit to the base, reduces the misalignment between the base and the roller body during the bearing installation process, and the second guide slope installs the bearing into the bearing installation hole in the fixture At this time, the second guiding slope abuts against the first guiding slope, and the second guiding slope plays a positioning role, thereby improving the assembly accuracy of the roller bearings and prolonging the service life of the rollers of the flat car.

Further, a positioning boss is fixed at the center of the base, the radius of the positioning boss matches the inner diameter of the bearing, and the sum of the heights of the positioning boss and the sleeve column is smaller than the height of the bearing.

By adopting the above technical scheme, the positioning boss plays the role of central positioning for the bearing, and the bearing is installed in the gap between the bearing installation hole and the positioning boss, which effectively reduces the phenomenon of bearing misalignment, thereby improving the assembly accuracy of the bearing and prolonging the life of the bearing. Extended the service life of the bottom flat car roller.

Further, a non-slip rubber layer is fixed on the top surface of the base.

By adopting the above technical solution, the anti-skid rubber layer effectively improves the connection stability between the base and the roller body, reduces the relative misalignment between the base and the roller body, and the anti-skid rubber layer protects the base, prolonging the service life of the fixture.

Further, a positioning pin is coaxially fixed in the middle of the set column, and a positioning through hole adapted to the positioning pin is opened in the center of the base.

By adopting the above technical solution, during the assembly process of the bearing, the positioning pin is first inserted into the bearing mounting hole. If the positioning pin just passes through the positioning through hole of the base, the bearing is just located in the center of the bearing mounting hole. If the bases are in conflict, the relative position of the bearing and the bearing installation hole needs to be adjusted. The setting of the positioning pin further improves the accuracy of the bearing installation and facilitates the assembly of the bearing.

Further, the base is cylindrical, and the diameter of the base is larger than the distance between the bearing installation hole and the reserved hole.

By adopting the above technical solution, the base with a larger area makes the press-fitting force received during the installation of the bearing relatively uniform, thereby improving the service life of the base.

Further, the base is provided with a fixing screw hole, the fixing screw hole is pierced with a fixing screw adapted to the fixing screw hole, and the fixing screw penetrates the fixing screw hole from the bottom surface of the base and is connected with the reserved The top of the hole passes through, and the end of the fixing screw is threadedly connected with a fixing nut;

Both ends of the reserved hole are respectively provided with adjustment blocks, one end of the adjustment block located at the lower end of the reserved hole is attached to the base, and the other end is attached to the lower surface of the roller body; one end of the adjustment block located at the upper end of the reserved hole is attached to the base. The fixing nut is attached, and the other end is attached to the upper surface of the roller body; the size of the adjustment block is larger than the aperture at the end of the reserved hole, and the adjustment block is provided with a connecting hole adapted to the fixing screw.

By adopting the above technical solution, the mutual cooperation of the fixing screw and the fixing nut improves the stable connection between the base and the roller body, and reduces the relative vibration between the bearing and the base during the installation process of the bearing, thereby affecting the installation accuracy of the bearing. The setting of the adjustment block enhances the relative action area between the base and the roller body, and the adjustment block located above the roller body makes the fixing nut not need to have a large size, and the fixing nut acts on the adjustment block through the adjustment block against the roller body The upper convenience can play a role in clamping the roller body and the base.

In summary, the utility model has the following beneficial effects:

1. The first slope is used to reduce the damage of the bearing. The bearing enters the bearing installation hole along the first slope, which improves the accuracy of the bearing installation and thus prolongs the service life of the roller of the flat car;

2. The positioning column and positioning hole are adopted, thereby reducing the relative misalignment between the base and the roller body, and improving the accuracy of bearing installation;

3. Positioning pins and positioning through holes are adopted, thereby further improving the accuracy of bearing installation and facilitating bearing assembly.

Description of drawings

Fig. 1 is a schematic structural view for embodying the whole in embodiment 1;

Fig. 2 is a schematic cross-sectional structure diagram for embodying the roller body in embodiment 1;

Fig. 3 is an enlarged schematic diagram of part A for embodying the first guide slope in Fig. 2;

Fig. 4 is the exploded structure schematic diagram that is used to reflect the connection relationship between the bottom flat car roller assembly and its special installation fixture in embodiment 2;

Fig. 5 is an enlarged schematic diagram of part B used to embody the second guide slope in Fig. 4;

6 is a schematic view of the overall structure used to reflect the connection relationship between the bottom flat car roller assembly and its special installation fixture in Embodiment 2;

Fig. 7 is a schematic cross-sectional structure diagram for showing the connection relationship between the roller assembly of the flat car and its special installation fixture in embodiment 2.

In the figure, 1. Roller body; 11. Bearing installation hole; 111. Flaring; 1111. First guide slope; 1112. Wear-resistant layer; 12. Reserved hole; 13. Positioning hole; 2. Bearing; 3. Pressure Rod body; 31, pressure head; 32, limit platform; 321, second guide slope; 33, set column; 331, positioning pin; 4, base; 41, positioning column; 42, positioning boss; 43, anti-skid rubber layer ; 44, positioning through hole; 45, fixing screw hole; 451, fixing screw; 4511, fixing nut; 5, adjusting block; 51, connecting hole.

Detailed ways

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

Wherein the same components are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the words "bottom" and "top "Face", "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular component.

Embodiment 1: A roller assembly of a flat car, as shown in Figure 1, includes a roller body 1 and a bearing 2, the roller body 1 is coaxially provided with a bearing installation hole 11 and a reserved hole 12, and the bearing 2 and the bearing installation hole 11 adaptations.

As shown in FIG. 2 , a plurality of positioning holes 13 are opened on both end surfaces of the roller body 1 , and the axial directions of the positioning holes 13 are parallel to the axial directions of the bearing installation holes 11 . The two ends of the bearing mounting hole 11 are coaxially provided with flaring openings 111 .

As shown in Figure 3, the top of the flaring 111 and the end of the bearing installation hole 11 are provided with a first guide slope 1111, and the connection between the first guide slope 1111 and the end of the bearing installation hole 11 is a circular arc transition, and the first guide slope 1111 A wear resistant layer 1112 is provided within the surface. When the bearing 2 (see Figure 1) is installed into the bearing installation hole 11 by the special installation fixture, if the bearing 2 is slightly misaligned with the bearing installation hole 11, the bearing 2 can slide into the bearing 2 installation hole 11 along the first guide slope 1111 , thereby effectively reducing the damage to the bearing 2 caused by the rigid contact between the bearing 2 and the roller body 1 .

Embodiment 2: A special installation fixture for the roller assembly of a flatbed car, as shown in Figure 4, includes a pressure rod body 3 and a base 4, and the pressure rod body 3 and the base 4 cooperate with each other to realize the installation of the bearing 2 of the roller body 1.

As shown in FIG. 4 , the pressing rod body 3 includes an integrally formed pressing head 31 , a limiting platform 32 and a sleeve column 33 . The height of the sleeve column 33 is smaller than the height of the bearing 2 , and the middle part of the sleeve column 33 is coaxially fixed with a positioning pin 331 .

As shown in FIG. 5 , a second guiding slope 321 adapted to the first guiding slope 1111 (see FIG. 3 ) is provided on the end surface of the limiting platform 32 .

As shown in Figure 4, the base 4 is cylindrical, and the radius of the base 4 is larger than the distance between the bearing installation hole 11 and the reserved hole 12. The acting force is relatively uniform, and the service life of the base 4 is improved. The top surface of the base 4 is fixed with an anti-slip rubber layer 43 , and the top surface of the base 4 is fixed with a plurality of positioning columns 41 corresponding to the positioning holes 13 of the roller body 1 . The positioning column 41 is plugged into the positioning hole 13 to realize the relative fixing of the base 4 and the roller body 1 . The center of the base 4 is fixed with a positioning boss 42 , the radius of the positioning boss 42 is adapted to the inner diameter of the bearing 2 , and the sum of the heights of the positioning boss 42 and the sleeve column 33 is less than the height of the bearing 2 . The positioning boss 42 plays a role of central positioning during the installation process of the bearing 2 , and the assembled bearing 2 is in the gap between the bearing installation hole 11 and the positioning boss 42 . The center of the base 4 is also provided with a positioning through hole 44 adapted to the positioning pin 331. The size of the positioning through hole 44 is smaller than the positioning boss 42, and the positioning through hole 44 vertically penetrates from the bottom of the base 4 to the top surface of the positioning boss 42. .

As shown in Figure 4, during the assembly process of the bearing 2, the positioning pin 331 is first inserted into the bearing installation hole 11, if the positioning pin 331 just passes through the positioning through hole 44 of the base 4, the bearing 2 is just positioned in the bearing installation hole 11, if the positioning pin 331 conflicts with the positioning boss 42, the relative position of the bearing 2 and the bearing mounting hole 11 needs to be adjusted. The setting of the positioning pin 331 further improves the installation accuracy of the bearing 2 and facilitates the assembly of the bearing 2.

As shown in FIG. 4 , a fixing screw hole 45 is provided on the base 4 , and a fixing screw 451 adapted to the fixing screw hole 45 is pierced in the fixing screw hole 45 , and a fixing nut 4511 is threadedly connected to the end of the fixing screw 451 . Both ends of the reserved hole 12 are respectively provided with adjustment blocks 5 . The size of the adjustment block 5 is larger than the diameter of the end of the reserved hole 12 . The adjustment block 5 is provided with a connection hole 51 adapted to the screw.

As shown in Figures 6 and 7, the fixing screw 451 penetrates the fixing screw hole 45 from the bottom surface of the base 4 and passes out from the top of the reserved hole 12, and the fixing screw 451 and the fixing nut 4511 are used in cooperation to improve the connection between the base 4 and the The connection of the roller body 1 is stable and fixed, which reduces the relative vibration between the bearing 2 and the base 4 during the installation process. The setting of the adjustment block 5 enhances the interaction area between the base 4 and the roller body 1, and improves the fixing screw 451 and the fixing nut. 4511 clamps and fixes the roller body 1 and the base 4.

The specific embodiment: the positioning post 41 on the base 4 is plugged into the positioning hole 13 of the roller body 1, and the base 4 and the roller are realized through the cooperation of the fixing screw 451, the fixing nut 4511, the adjustment block 5 and the reserved hole 12 of the roller. The relative fixing of the roller body 1. Then the bearing 2 is set on the set column 33, and the pressure device acts on the end of the pressure head 31 away from the set column 33, and the bearing 2 enters the flared mouth 111 and the bearing installation hole 11 in sequence. If the top of the positioning boss 42 collides, the operator is reminded to adjust the relative positional relationship between the bearing 2 and the mounting hole 11 of the bearing 2 until the positioning pin 331 can pass through the positioning through hole 44 . When the second guide slope 321 abuts against the first guide slope 1111 accurately, the bearing 2 is installed in place. Then first disengage the sleeve column 33 from the bearing 2, then disassemble the fixing nut 4511 and the fixing screw 451, separate the base 4 from the roller body 1, and complete the installation of the bearing 2 so far.

This specific embodiment is only an explanation of the utility model, and it is not a limitation of the utility model. After reading this description, those skilled in the art can make modifications to the embodiment without creative contribution according to needs, but as long as it is within the utility model All new claims are protected by patent law.

Claims (9)

1. A bottom flat car roller assembly, comprising a roller body (1) and a bearing (2), the roller body (1) is coaxially provided with a bearing mounting hole (11) and a reserved hole (12), the The bearing (2) is adapted to the bearing mounting hole (11), and the feature is that: the two end faces of the roller body (1) are respectively provided with several positioning holes (13), and the axial direction of the positioning hole (13) parallel to the axial direction of the bearing mounting hole (11); The two ends of the bearing installation hole (11) are coaxially provided with flares (111), the radius of the flares (111) gradually decreases from the upper surface of the roller body (1) to the bearing installation hole (11) and forms a second A guide ramp (1111). 2. The roller assembly of a flatbed vehicle according to claim 1, characterized in that: the connection between the first guide slope (1111) and the end of the bearing installation hole (11) is in a circular arc transition. 3. The roller assembly of a flatbed vehicle according to claim 1, characterized in that: a wear-resistant layer (1112) is provided on the surface of the first guide slope (1111). 4. A special installation fixture for the roller assembly of a flatbed vehicle according to any one of claims 1 to 3, comprising a pressure rod body (3) and a base (4), and the pressure rod body (3) includes an integrally formed pressure rod body (3) head (31), limiting platform (32) and sleeve column (33), the height of described sleeve column (33) is less than the height of bearing (2), it is characterized in that: described base (4) top surface is fixed with A plurality of positioning columns (41) corresponding to the positioning holes (13), and a second guiding slope (321) adapted to the first guiding slope (1111) are provided on the end surface of the limiting platform (32). 5. The special installation fixture for the roller assembly of a flat car according to claim 4, characterized in that: a positioning boss (42) is fixed at the center of the base (4), and the positioning boss (42) The radius of the bearing (2) is adapted to the inner diameter of the bearing (2), and the sum of the heights of the positioning boss (42) and the sleeve column (33) is less than the height of the bearing (2). 6. The special installation fixture for the roller assembly of a flatbed car according to claim 4, characterized in that: the top surface of the base (4) is fixed with a non-slip rubber layer (43). 7. The special installation fixture for the roller assembly of a flatbed car according to claim 4, characterized in that: a positioning pin (331) is coaxially fixed in the middle of the set column (33), and the base (4) A positioning through hole (44) adapted to the positioning pin (331) is opened in the center. 8. A special installation fixture for the roller assembly of a flatbed car according to claim 4, characterized in that: the base (4) is cylindrical, and the diameter of the base (4) is larger than the bearing installation hole (11) to the distance between the reserved holes (12). 9. The special installation fixture for the roller assembly of a flat car according to claim 8, characterized in that: the base (4) is provided with a fixing screw hole (45), and the fixing screw hole (45) A fixing screw (451) adapted to the fixing screw hole (45) is pierced inside, and the fixing screw (451) penetrates the fixing screw hole (45) from the bottom surface of the base (4) and connects with the reserved hole (12) The top goes out, and the end of the fixing screw (451) is threadedly connected with a fixing nut (4511); The two ends of the reserved hole (12) are respectively provided with adjustment blocks (5), and one end of the adjustment block (5) located at the lower end of the reserved hole (12) fits with the base (4), and the other end fits with the roller body (1 ) is attached to the lower surface; one end of the adjustment block (5) located at the upper end of the reserved hole (12) is attached to the fixed nut (4511), and the other end is attached to the upper surface of the roller body (1); the adjustment block The size of (5) is larger than the diameter of the end of the reserved hole (12), and the adjustment block (5) is provided with a connecting hole (51) adapted to the fixing screw (451).