An assembly tool and assembly method for a double-row full-complement cylindrical roller bearing without an outer ring

Abstract

The present invention discloses an assembly tool and an assembly method of a double-row full-fill cylindrical roller bearing without an outer ring, comprising: a seat body, provided with an inner hole capable of accommodating an inner ring of a bearing, lower window holes and upper window holes arranged at intervals are opened radially along the inner hole, the sum of the number of the lower window holes and the upper window holes being equal to the number of rollers on a single-row raceway on the inner ring of the bearing, and the spacing between the lower window holes and the upper window holes in the axial direction of the inner hole is matched with the spacing between two rows of raceways on the inner ring of the bearing; a mandrel, used for supporting the inner ring of the bearing, capable of moving along the inner hole of the seat body, driving the inner ring of the bearing to rise and fall along the inner hole of the seat body; a push-pull rod, used for pushing the rollers in the upper window holes and the lower window holes into the raceway of the inner ring of the bearing; the mandrel is lifted and lowered, so that the raceway of the inner ring of the bearing supported by the mandrel is opposite to the upper window hole and / or the lower window hole, so that the push-pull rod pushes the rollers in the upper window hole and / or the lower window hole into the raceway. The quality of the bearing assembly is ensured to be controllable, the difficulty of assembly is reduced, and the standardization of the operation process is achieved to adapt to the mass production of bearings.

Description

Technical Field

[0001] The invention relates to the technical field of bearing assembly, and in particular to an assembly tool and an assembly method for a double-row full-complement cylindrical roller bearing without an outer ring. Background Art

[0002] Double-row full complement cylindrical roller bearings without outer rings are designed to bear heavy loads. Compared with traditional bearings with cages, they have extremely high load-bearing capacity and small radial cross-section at the same width, which can save space. Double-row full complement cylindrical roller bearings without outer rings have neither outer rings nor cages. It is not easy to assemble the rollers to the raceway of the inner ring of the bearing during assembly. It often happens that as soon as part of the rollers are installed, the other part of the rollers fall off the raceway.

[0003] The commonly used assembly method is to use rubber strips to fix the roller group and complete the installation of the rollers by continuously moving the rubber strips. The advantage of this assembly method is that it does not require the production of specific tooling equipment, so it is suitable for small-scale bearing production. However, this assembly method requires a lot of manual operation, which requires high experience and skills of the operators. The quality of assembly is not satisfactory, so it is not suitable for large-scale production of bearings. Summary of the invention

[0004] The present invention provides an assembly tool and an assembly method for a double-row full-complement cylindrical roller bearing without an outer ring, so as to ensure that the assembly quality of the double-row full-complement cylindrical roller bearing without an outer ring is controllable, reduce the assembly difficulty thereof, and realize the standardization of the operation process to adapt to the mass production of bearings.

[0005] In order to achieve the above object, the technical solution of the present invention is:

[0006] An assembly tool for a double-row full-complement cylindrical roller bearing without an outer ring, comprising:

[0007] A seat body, wherein the seat body is provided with an inner hole capable of accommodating the inner ring of the bearing, and the seat body is provided with lower window holes and upper window holes which are arranged at intervals along the radial direction of the inner hole, the sum of the number of the lower window holes and the upper window holes is equal to the number of rollers of a single row raceway on the inner ring of the bearing, and in the axial direction of the inner hole, the spacing between the lower window holes and the upper window holes matches the spacing between the two rows of raceways on the inner ring of the bearing;

[0008] A mandrel, the mandrel is used to support the inner ring of the bearing, the mandrel can move along the inner hole of the seat body, and drive the inner ring of the bearing to rise and fall along the inner hole of the seat body;

[0009] A push-pull rod, which is used to push the rollers in the upper window hole and the lower window hole into the raceway of the inner ring of the bearing;

[0010] The lifting and lowering of the core shaft can make the raceway of the inner ring of the bearing supported by the core shaft face the upper window hole and / or the lower window hole, so that the push-pull rod can push the roller in the upper window hole and / or the lower window hole into the raceway.

[0011] Furthermore, the lifting and lowering of the core shaft can also enable the inner ring of the bearing supported by the core shaft to enter a retaining sleeve placed on the top of the seat body, and the retaining sleeve is used to limit the rollers on the inner ring of the bearing from leaving the raceway.

[0012] Furthermore, a lower material guide channel and an upper material guide channel are provided on the inner wall of the seat body;

[0013] The lower guide channel is arranged along the axial direction of the inner hole, one end of the lower guide channel is connected to the inner end of the lower window hole, and the other end of the lower guide channel passes through the seat body upward, and the roller located on the raceway of the inner ring of the bearing can slide along the lower guide channel;

[0014] The upper guide channel is arranged along the axial direction of the inner hole, one end of the upper guide channel is connected to the inner end of the upper window hole, and the other end of the upper guide channel passes through the seat body upward, and the roller located on the bearing inner ring raceway can slide along the upper guide channel.

[0015] Furthermore, the seat body is provided with a lower feed hole and an upper feed hole;

[0016] The lower feed hole is arranged along the axial direction of the inner hole, one end of the lower feed hole is connected to the lower window hole, and the other end of the lower feed hole passes through the seat body upward, so that the roller can enter the lower window hole along the lower feed hole;

[0017] The upper feed hole is arranged along the axial direction of the inner hole, one end of the upper feed hole is connected to the upper window hole, and the other end of the upper feed hole passes through the seat body upward, and the roller can enter the upper window hole along the upper feed hole.

[0018] Furthermore, the widths of the upper window hole and the lower window hole are 1-2 mm larger than the diameter of the roller, and the heights of the upper window hole and the lower window hole are 1-2 mm higher than the length of the roller.

[0019] Furthermore, when the core shaft is lifted or lowered until the raceway of the inner ring of the bearing supported by the core shaft is opposite to the upper window hole and / or the lower window hole, the bottom of the upper window hole and / or the lower window hole is 0.03-0.07mm higher than the corresponding rib at the bottom of the raceway.

[0020] Furthermore, it also includes a core shaft linear transmission mechanism and a push-pull rod linear transmission mechanism, wherein the core shaft linear transmission mechanism is used to drive the core shaft to linearly displace along the axial direction of the inner hole, and the push-pull rod linear transmission mechanism is used to drive the push-pull rod to linearly displace along the radial direction of the inner hole.

[0021] Furthermore, the core shaft is a stepped shaft, the top of the stepped shaft is a small-diameter end, and the bearing inner ring can be sleeved on the small-diameter end.

[0022] A method for assembling a double-row full-complement cylindrical roller bearing without an outer ring, using the aforementioned assembly tool for the double-row full-complement cylindrical roller bearing without an outer ring, comprises the following steps:

[0023] S1: The mandrel drives the inner ring of the bearing to rise and fall, so that the lower window hole is opposite to the raceway on the upper part of the inner ring of the bearing, and the push-pull rod pushes the roller in the lower window hole into the raceway on the upper part of the inner ring of the bearing;

[0024] S2: The mandrel drives the inner ring of the bearing to rise, so that the lower window hole is opposite to the raceway on the upper part of the inner ring of the bearing. The push-pull rod pushes the roller in the lower window hole into the raceway on the lower part of the inner ring of the bearing, and the push-pull rod pushes the roller in the upper window hole into the raceway on the upper part of the inner ring of the bearing.

[0025] S3: The core shaft drives the inner ring of the bearing to rise, so that the upper window hole is opposite to the raceway at the lower part of the inner ring of the bearing, and the push-pull rod pushes the roller in the upper window hole into the raceway at the lower part of the inner ring of the bearing.

[0026] Furthermore, the method further comprises the following steps:

[0027] S4: The mandrel drives the inner ring of the bearing to rise until the inner ring of the bearing supported by the mandrel enters the retaining sleeve placed on the top of the seat body.

[0028] Beneficial effects: The present invention discloses an assembly tool and assembly method for a double-row full-complement cylindrical roller bearing without an outer ring. By arranging a lower window hole and an upper window hole on the seat body, the assembly of the roller and the inner ring of the bearing is achieved by coordinating the lifting and lowering of the core shaft and the pushing and pulling of the push-pull rod. It no longer relies on the experience and skills of the operator, and the assembly quality is controllable. The assembly difficulty of the double-row full-complement cylindrical roller bearing without an outer ring is reduced, and the operation process can be standardized, which is suitable for mass production of bearings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0030] Figure 1 It is a cross-sectional schematic diagram of an assembly tool for a double-row full-complement cylindrical roller bearing without an outer ring disclosed in the present invention;

[0031] Figure 2It is a top view schematic diagram of an assembly tool for a double-row full-complement cylindrical roller bearing without an outer ring disclosed in the present invention;

[0032] Figure 3 It is a schematic diagram of the cooperation between a seat body and a push-pull rod of an assembly tool for a double-row full-complement cylindrical roller bearing without an outer ring disclosed in the present invention;

[0033] Figure 4 It is a structural schematic diagram of a seat body of an assembly tool for a double-row full-complement cylindrical roller bearing without an outer ring disclosed in the present invention;

[0034] Figure 5 It is a structural schematic diagram of a push-pull rod of a seat body of an assembly tool for a double-row full-complement cylindrical roller bearing without an outer ring disclosed in the present invention;

[0035] Figure 6 The working principle of the assembly tool of the double-row full-complement cylindrical roller bearing without outer ring disclosed by the present invention Figure 1 ;

[0036] Figure 7 The working principle of the assembly tool of the double-row full-complement cylindrical roller bearing without outer ring disclosed by the present invention Figure 2 ;

[0037] Figure 8 The working principle of the assembly tool of the double-row full-complement cylindrical roller bearing without outer ring disclosed by the present invention Figure 3 ;

[0038] Fig. 9 The working principle of the assembly tool of the double-row full-complement cylindrical roller bearing without outer ring disclosed by the present invention Figure 4 ;

[0039] Fig.10 The working principle of the assembly tool of the double-row full-complement cylindrical roller bearing without outer ring disclosed by the present invention Figure 5 .

[0040] In the figure: 1. seat body; 101. lower window hole; 102. upper window hole; 103. lower feed hole; 104. upper feed hole; 105. lower material guide channel; 106. upper material guide channel; 2. core shaft; 3. bearing inner ring; 301. first rib; 302. second rib; 303. upper raceway; 304. lower raceway; 4. roller; 5. push-pull rod; 6. retaining sleeve. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] Example 1

[0043] This embodiment provides an assembly tool for a double-row full-complement cylindrical roller bearing without an outer ring, such as Figures 1 to 3 As shown, including:

[0044] Seat 1, such as Figure 4 As shown, the seat body 1 is provided with an inner hole capable of accommodating the bearing inner ring 3, and the seat body 1 is provided with lower window holes 101 and upper window holes 102 arranged at intervals along the radial direction of the inner hole, and the sum of the number of the lower window holes 101 and the upper window holes 102 is equal to the number of rollers 4 of a single-row raceway on the bearing inner ring 3, and in the axial direction of the inner hole, the spacing between the lower window holes 101 and the upper window holes 102 matches the spacing between the two rows of raceways on the bearing inner ring 3 (the two rows of raceways are Figure 7 and Figure 8 The upper raceway 303 and the lower raceway 304 are shown);

[0045] A mandrel 2, the mandrel 2 is used to support the bearing inner ring 3, the mandrel 2 is coaxially arranged with the seat body 1, and the mandrel 2 can move along the inner hole of the seat body 1, driving the bearing inner ring 3 to rise and fall along the inner hole of the seat body 1;

[0046] Push-pull rod 5, such as Figure 5 As shown, the push-pull rod 5 is used to push the rollers 4 in the upper window hole 102 and the lower window hole 101 into the raceway of the bearing inner ring 3;

[0047] The core shaft 2 is lifted and lowered, so that the raceway of the bearing inner ring 3 supported by the core shaft 2 is opposite to the upper window hole 102 and / or the lower window hole 101, so that the push-pull rod 5 can push the roller 4 located in the upper window hole 102 and / or the lower window hole 101 into the raceway;

[0048] like Figure 4 As shown, a lower material guide channel 105 and an upper material guide channel 106 are provided on the inner wall of the seat body 1;

[0049] The lower guide channel 105 is arranged along the axial direction of the inner hole, one end of the lower guide channel 105 is connected to the inner end of the lower window hole 101, and the other end of the lower guide channel 105 passes through the seat body 1 upward, and the roller 4 located on the raceway of the bearing inner ring 3 can slide along the lower guide channel 105;

[0050] The upper guide channel 106 is arranged along the axial direction of the inner hole, one end of the upper guide channel 106 is connected to the inner end of the upper window hole 102, and the other end of the upper guide channel 106 passes through the seat body 1 upward, and the roller 4 located on the raceway of the bearing inner ring 3 can slide along the upper guide channel 106;

[0051] The roller 4 is always in contact with the raceway of the bearing inner ring 3 through the lower guide channel 105 and the upper guide channel 106, and does not tilt;

[0052] like Figure 4 As shown, the seat body 1 is provided with a lower feed hole 103 and an upper feed hole 104;

[0053] The lower feed hole 103 is arranged along the axial direction of the inner hole, one end of the lower feed hole 103 is connected to the lower window hole 101, and the other end of the lower feed hole 103 passes through the seat body 1 upward, and the roller 4 can enter the lower window hole 101 along the lower feed hole 103;

[0054] The upper feed hole 104 is arranged along the axial direction of the inner hole, one end of the upper feed hole 104 is connected to the upper window hole 102, and the other end of the upper feed hole 104 passes through the seat body 1 upward, so that the roller 4 can enter the upper window hole 102 along the upper feed hole 104;

[0055] The lower feed hole 103 and the upper feed hole 104 of the seat body 1 are used for feeding the roller 4, the lower window hole 101 and the upper window hole 102 are used for installing the matching roller 4 on the bearing inner ring 3 along the inner hole radial direction, and the lower guide channel 105 and the upper guide channel 106 are used for guiding the displacement of the roller 4 along the inner hole axial direction;

[0056] The present invention discloses an assembly tool for a double-row fully-filled cylindrical roller bearing without an outer ring. By arranging a lower window hole 101 and an upper window hole 102 on a seat body 1, the lower window hole 101 and / or the upper window hole 102 are aligned with a raceway in coordination with the lifting and lowering of a core shaft 2. After alignment, the roller 4 is pushed into the raceway by pushing and pulling a push-pull rod 5, so that the roller 4 and the inner ring 3 of the bearing are assembled. The tool no longer relies on the experience and skills of the operator, and the assembly quality is controllable, thereby reducing the assembly difficulty of the double-row fully-filled cylindrical roller bearing without an outer ring. The operation process can be standardized, which is suitable for mass production of bearings.

[0057] In a specific embodiment, the core shaft 2 is raised and lowered, and the inner ring 3 of the bearing supported by the core shaft 2 can enter the retaining sleeve 6 placed on the top of the seat body 1. The retaining sleeve 6 is used to limit the roller 4 on the inner ring 3 of the bearing from leaving the raceway, so as to avoid the complete assembly of the double-row fully loaded cylindrical roller bearing without an outer ring from falling apart.

[0058] In a specific embodiment, the width of the upper window hole 102 and the lower window hole 101 are 1-2 mm larger than the diameter of the roller 4, and the height of the upper window hole 102 and the lower window hole 101 are 1-2 mm higher than the length of the roller 4, so as to ensure that the push-pull rod 5 can push the roller 4 smoothly and ensure that the roller 4 will not be pushed down by the push-pull rod 5.

[0059] In a specific embodiment, when the mandrel 2 is lifted and lowered until the raceway of the bearing inner ring 3 supported by the mandrel 2 is opposite to the upper window hole 102 and / or the lower window hole 101, the bottom of the upper window hole 102 and / or the lower window hole 101 is 0.03-0.07 mm higher than the corresponding retaining edge at the bottom of the raceway, so as to ensure that the roller 4 can be correctly filled into the raceway, and the roller 4 does not get stuck when being pushed into the raceway;

[0060] In this embodiment, Figure 7 and Figure 8 For example, Figure 7 The bottom of the lower window hole 101 is higher than the first rib 301 at the bottom of the upper raceway 303. Figure 8 The bottom of the lower window hole 101 is higher than the second rib 302 at the bottom of the lower raceway 304 .

[0061] In a specific embodiment, it also includes a core shaft linear transmission mechanism and a push-pull rod linear transmission mechanism. The core shaft linear transmission mechanism is used to drive the core shaft 2 to linearly displace along the axial direction of the inner hole, and the push-pull rod linear transmission mechanism is used to drive the push-pull rod 5 to linearly displace along the radial direction of the inner hole. The linear transmission mechanism includes but is not limited to a cylinder, a linear motor and a linear module, so as to perform batch assembly in an automated manner to improve production efficiency.

[0062] In a specific embodiment, Figure 1 As shown, the core shaft 2 is a stepped shaft, the top of the stepped shaft is a small-diameter end, and the bearing inner ring 3 can be sleeved on the small-diameter end, thereby providing support and positioning for the bearing inner ring 3.

[0063] Example 2

[0064] This embodiment provides an assembly method for a double-row full-complement cylindrical roller bearing without an outer ring, using an assembly tool for a double-row full-complement cylindrical roller bearing without an outer ring as described in Embodiment 1, comprising the following steps:

[0065] S0: Figure 6As shown, the mandrel 2 rises until the small-diameter end of the mandrel 2 extends out of the seat body 1, the bearing inner ring 3 can be sleeved on the small-diameter end, the bearing inner ring 3 and the retaining sleeve 6 are placed, the push-pull rods 5 corresponding to the lower window hole 101 and the upper window hole 102 are pulled to the outermost side, and the rollers 4 are fed into the lower window holes 101 and the upper window holes 102 through the lower feed holes 103 and the upper feed holes 104 (when the push-pull rods 5 are pulled to the outermost side, the rollers 4 can be loaded into the lower window holes 101 and the upper window holes 102, and when the push-pull rods 5 are pushed inward, the rollers 4 can be pushed toward the raceway, and the subsequent steps will not be repeated);

[0066] S1: Figure 7 As shown, the core shaft 2 drives the bearing inner ring 3 to descend, so that the lower window hole 101 is opposite to the upper raceway 303, so that the push-pull rod 5 can push the roller 4 located in the lower window hole 101 into the upper raceway 303, and the push-pull rod 5 pushes the roller 4 located in the lower window hole 101 into the upper raceway 303, and half the number of rollers 4 are installed in the upper raceway 303;

[0067] S2: Figure 8 As shown, the core shaft 2 drives the bearing inner ring 3 to rise, so that the lower window hole 101 is opposite to the lower raceway 304, so that the push-pull rod 5 can push the roller 4 located in the lower window hole 101 into the lower raceway 304, the push-pull rod 5 pushes the roller 4 located in the lower window hole 101 into the lower raceway 304, and installs half of the rollers 4 in the lower raceway 304, and the push-pull rod 5 pushes the roller 4 located in the upper window hole 102 into the upper raceway 303, and installs the remaining rollers 4 in the upper raceway 303, and fills the upper raceway 303;

[0068] S3: Fig. 9 As shown, the core shaft 2 drives the bearing inner ring 3 to rise, so that the upper window hole 102 is opposite to the lower raceway 304, and the push-pull rod 5 can push the roller 4 located in the upper window hole 102 to the position in the lower raceway 304. The push-pull rod 5 pushes the roller 4 located in the upper window hole 102 into the lower raceway 304, and assembles the remaining rollers 4 into the lower raceway 304 to fill the lower raceway 304. At this time, the upper half of the bearing inner ring 3 carries the roller 4 in the upper raceway 303 into the retaining sleeve 6;

[0069] S4: Fig.10 As shown, the core shaft 2 drives the bearing inner ring 3 to rise until the core shaft 2 drives the bearing inner ring 3 to completely enter the retaining sleeve 6 placed on the top of the seat body 1. At this time, the double-row full-filled cylindrical roller bearing without an outer ring (that is, the bearing inner ring 3 filled with two rows of rollers 4) with the retaining sleeve 6 can be removed, and then the above operation is repeated to assemble the next double-row full-filled cylindrical roller bearing without an outer ring.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An assembly tool for double-row full-complement cylindrical roller bearings without outer rings, characterized in that: include: A seat body (1), the seat body (1) being provided with an inner hole capable of accommodating an inner ring of a bearing, the seat body (1) being provided with lower window holes (101) and upper window holes (102) arranged at intervals along the radial direction of the inner hole, the sum of the number of the lower window holes (101) and the upper window holes (102) being equal to the number of rollers in a single-row raceway on the inner ring of the bearing, and in the axial direction of the inner hole, the spacing between the lower window holes (101) and the upper window holes (102) matching the spacing between two-row raceways on the inner ring of the bearing; A core shaft (2), the core shaft (2) being used to support the inner ring of the bearing, the core shaft (2) being able to move along the inner hole of the seat body (1), driving the inner ring of the bearing to rise and fall along the inner hole of the seat body (1); A push-pull rod (5), the push-pull rod (5) being used to push the rollers in the upper window hole (102) and the lower window hole (101) into the raceway of the inner ring of the bearing; The core shaft (2) is raised and lowered so that the raceway of the inner ring of the bearing supported by the core shaft (2) is opposite to the upper window hole (102) and / or the lower window hole (101), so that the push-pull rod (5) can push the roller located in the upper window hole (102) and / or the lower window hole (101) into the raceway.

2. The assembly tool for a double-row full complement cylindrical roller bearing without an outer ring according to claim 1, characterized in that: The core shaft (2) is lifted and lowered, so that the inner ring of the bearing supported by the core shaft (2) can enter a retaining sleeve (6) disposed on the top of the seat body (1), and the retaining sleeve (6) is used to limit the roller on the inner ring of the bearing from leaving the raceway.

3. The assembly tool for a double-row full complement cylindrical roller bearing without an outer ring according to claim 1, characterized in that: A lower material guide channel (105) and an upper material guide channel (106) are provided on the inner wall of the seat body (1); The lower guide channel (105) is arranged along the axial direction of the inner hole, one end of the lower guide channel (105) is connected to the inner end of the lower window hole (101), and the other end of the lower guide channel (105) passes through the seat body (1) upward, and the roller located on the raceway of the inner ring of the bearing can slide along the lower guide channel (105); The upper guide channel (106) is arranged along the axial direction of the inner hole, one end of the upper guide channel (106) is connected to the inner end of the upper window hole (102), and the other end of the upper guide channel (106) passes through the seat body (1) upward, and the roller located on the inner ring raceway of the bearing can slide along the upper guide channel (106).

4. The assembly tool for a double-row full complement cylindrical roller bearing without an outer ring according to claim 1, characterized in that: The seat body (1) is provided with a lower feed hole (103) and an upper feed hole (104); The lower feed hole (103) is arranged along the axial direction of the inner hole, one end of the lower feed hole (103) is connected to the lower window hole (101), and the other end of the lower feed hole (103) passes through the seat body (1) upward, so that the roller can enter the lower window hole (101) along the lower feed hole (103); The upper feed hole (104) is arranged along the axial direction of the inner hole, one end of the upper feed hole (104) is connected to the upper window hole (102), and the other end of the upper feed hole (104) passes through the seat body (1) upwards, so that the roller can enter the upper window hole (102) along the upper feed hole (104).

5. The assembly tool for a double-row full complement cylindrical roller bearing without an outer ring according to claim 1, characterized in that: The widths of the upper window hole (102) and the lower window hole (101) are both 1-2 mm larger than the diameter of the roller, and the heights of the upper window hole (102) and the lower window hole (101) are both 1-2 mm higher than the length of the roller.

6. The assembly tool for a double-row full complement cylindrical roller bearing without an outer ring according to claim 5, characterized in that: When the core shaft (2) is lifted and lowered until the raceway of the inner ring of the bearing supported by the core shaft (2) is opposite to the upper window hole (102) and / or the lower window hole (101), the bottom of the upper window hole (102) and / or the lower window hole (101) is 0.03-0.07 mm higher than the rib at the bottom of the corresponding raceway.

7. The assembly tool for a double-row full complement cylindrical roller bearing without an outer ring according to claim 1, characterized in that: It also includes a core shaft linear transmission mechanism and a push-pull rod linear transmission mechanism, wherein the core shaft linear transmission mechanism is used to drive the core shaft (2) to linearly displace along the axial direction of the inner hole, and the push-pull rod linear transmission mechanism is used to drive the push-pull rod (5) to linearly displace along the radial direction of the inner hole.

8. The assembly tool for a double-row full complement cylindrical roller bearing without an outer ring according to claim 1, characterized in that: The core shaft (2) is a stepped shaft, the top of the stepped shaft is a small-diameter end, and the bearing inner ring can be sleeved on the small-diameter end.

9. An assembly method for a double-row full-complement cylindrical roller bearing without an outer ring, using an assembly tool for a double-row full-complement cylindrical roller bearing without an outer ring according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1: The core shaft (2) drives the inner ring of the bearing to rise and fall, so that the lower window hole (101) is opposite to the raceway on the upper part of the inner ring of the bearing, and the push-pull rod (5) pushes the roller located in the lower window hole (101) into the raceway on the upper part of the inner ring of the bearing; S2: the core shaft (2) drives the inner ring of the bearing to rise, so that the lower window hole (101) is opposite to the raceway at the upper part of the inner ring of the bearing, the push-pull rod (5) pushes the roller located in the lower window hole (101) into the raceway at the lower part of the inner ring of the bearing, and the push-pull rod (5) pushes the roller located in the upper window hole (102) into the raceway at the upper part of the inner ring of the bearing; S3: The core shaft (2) drives the inner ring of the bearing to rise, so that the upper window hole (102) is opposite to the raceway at the lower part of the inner ring of the bearing, and the push-pull rod (5) pushes the roller in the upper window hole (102) into the raceway at the lower part of the inner ring of the bearing.

10. The method for assembling a double-row full complement cylindrical roller bearing without an outer ring according to claim 9, characterized in that: The following steps are also included: S4: The core shaft (2) drives the inner ring of the bearing to rise until the inner ring of the bearing supported by the core shaft (2) enters the retaining sleeve (6) placed on the top of the seat body (1).

Images