Spindle mounting structure of thread rolling machine

Abstract

The utility model discloses a mounting structure for a main shaft of a thread rolling machine, relates to the technical field of thread rolling machines, and solves the problem that the thread rolling machining precision is influenced due to the fact that the main shaft of the existing thread rolling machine is easy to axially move. The device comprises an adjusting plate; a front support block; a rear support block; the front end of the main shaft is rotationally connected with the front supporting block through a bearing, and the rear end of the main shaft is rotationally connected with the rear supporting block through a bearing; a thread rolling wheel; wherein a thrust bearing and a disc spring are arranged in the rear supporting block, the thrust bearing is installed on the main shaft, the disc spring can exert axial force on the main shaft so that the main shaft can be tightly attached to the thrust bearing, a front end cover is arranged at the front end of the main shaft, and a rear end cover is arranged at the rear end of the main shaft. The front end cover is located on the outer side of the front supporting block and fixedly connected with the main shaft through a screw. The main shaft installation structure has the advantages of being simple in structure, convenient to install and the like, it can be guaranteed that the main shaft is not prone to axial movement, and the thread rolling machining precision of the thread rolling machine can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of thread rolling machines, in particular to a main shaft mounting structure of a thread rolling machine. Background Art

[0002] A thread rolling machine is a versatile cold extrusion machine. It can cold-roll threads, straight grain, and diagonal grain within its rolling force range; roll spur, helical, and helical spline gears; and perform straightening, diameter reduction, burnishing, and various other forming operations. The cold rolling process is an advanced, non-cutting process that effectively improves both the internal and surface quality of workpieces.

[0003] During the thread rolling process, two rolling wheels are mounted on two spindles to roll the bolt blank. In existing thread rolling machines, the rolling wheels and spindles are subjected to significant axial forces during the rolling process. This can easily cause the spindle to deflect axially, which in turn causes the rolling wheels to deflect axially, affecting the accuracy of the thread rolling process. Utility Model Content

[0004] The purpose of the utility model is to solve the above problems and to design a thread rolling machine main shaft installation structure, which solves the problem that the main shaft of the existing thread rolling machine is prone to axial movement, which affects the thread rolling processing accuracy.

[0005] To achieve the above-mentioned purpose, the technical solution of the present invention is to provide a thread rolling machine spindle mounting structure, comprising:

[0006] Adjustment plate;

[0007] A front support block, which is detachably mounted on the side of the adjustment plate and can support the front end of the main shaft;

[0008] A rear support block, which is mounted on the side of the adjustment plate and can support the rear end of the main shaft;

[0009] A main shaft, wherein the front end of the main shaft is rotatably connected to the front support block via a bearing, and the rear end of the main shaft is rotatably connected to the rear support block via a bearing;

[0010] A thread rolling wheel, which is mounted on the main shaft and located between the front support block and the rear support block;

[0011] A thrust bearing and a disc spring are provided inside the rear support block, the thrust bearing is mounted on the main shaft, the disc spring can apply axial force to the main shaft so that the main shaft is close to the thrust bearing, and a front end cover is provided at the front end of the main shaft, the front end cover is located on the outside of the front support block and is fixedly connected to the main shaft by screws.

[0012] Preferably, a T-slot is provided on the side of the adjustment plate, a T-rod is provided on the back of the front support block which is slidably connected to the T-slot, an adjustment rod is threadedly connected to the front end face of the front support block, one end of the T-rod is inserted into the front support block and can be engaged with the adjustment rod, and the adjustment rod can adjust the axial displacement of the T-rod to adjust the static friction between the T-end of the T-rod and the T-slot.

[0013] Preferably, the front end of the adjusting rod has an eccentric rod, the eccentric rod and the adjusting rod are eccentrically arranged, and the T-shaped rod has a groove that is engaged with the eccentric rod.

[0014] Preferably, a positioning bolt is threadedly connected to the top surface of the front support block, and an outer peripheral surface of the adjustment rod has an annular groove that can be engaged with the positioning bolt.

[0015] Preferably, a slide rail is provided on the back side of the front support block, a slide groove is provided on the side of the adjustment plate, and the slide rail is slidably connected to the slide groove.

[0016] Preferably, bearing end covers for sealing and fixing the bearings are provided on the front and rear sides of the front support block and the rear support block.

[0017] Preferably, a spacer is provided between the front end of the main shaft and the bearing in the front support block, a sealing ring is provided between the spacer and the bearing end cover, and a sealing ring is provided between the bearing end cover on the rear support block and the main shaft.

[0018] Preferably, a first cavity and a second cavity are formed in the rear support block, and the first cavity and the second cavity are connected by a through hole, the diameter of the through hole is smaller than the diameter of the first cavity and the second cavity, thrust bearings are provided in the first cavity and the second cavity, and the disc spring is located in the second cavity.

[0019] Preferably, a roller bearing is provided in the second cavity, and the disc spring is located between the thrust bearing and the roller bearing.

[0020] Preferably, the rear end of the main shaft is connected to a spline shaft, and the spline shaft is used to connect to a driving mechanism.

[0021] Compared with the prior art, the beneficial effects are:

[0022] The spindle mounting structure of the present invention has the advantages of simple structure and easy installation. It can ensure that the spindle is not prone to axial movement, which helps to improve the thread rolling processing accuracy of the thread rolling machine. The front end of the spindle is rotatably connected to the front support block through a bearing, and the rear end of the spindle is rotatably connected to the rear support block through a bearing. The thread rolling wheel is installed on the spindle and is located between the front support block and the rear support block. The front support block and the rear support block support the spindle to ensure its stable rotation. The thrust bearing in the rear support block will bear and balance the axial force of the spindle, so that the spindle will not deviate axially. If an axial gap appears between the spindle and the thrust bearing, the disc spring in the rear support block will apply axial force to the thrust bearing, so that the thrust bearing is always close to the spindle, positioning it, and ensuring that the spindle will not move axially. The front end of the spindle is limited by the front end cover to further prevent the spindle from moving axially. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of the main shaft installation structure of the utility model;

[0024] Figure 2 This is a structural diagram of the spindle installation structure from another perspective;

[0025] Figure 3 It is a schematic diagram of the cross-sectional structure of the spindle installation structure;

[0026] Figure 4 This is a schematic diagram of the spindle installation structure when the adjustment plate, front support block and rear support block are removed;

[0027] Figure 5 1 is a schematic diagram of the cross-sectional structure of the rear support block;

[0028] Figure 6 It is a structural diagram of the adjustment plate;

[0029] Figure 7 It is a schematic diagram of the structure of the T-bar;

[0030] Figure 8 It is a schematic diagram of the axial side structure of the adjusting rod;

[0031] Figure 9 It is a schematic diagram of the planar structure of the front end surface of the adjusting rod.

[0032] In the figure, 1. adjustment plate; 101. T-slot; 102. slide groove; 2. front support block; 3. rear support block; 301. first cavity; 302. second cavity; 303. through hole; 4. main shaft; 5. thread rolling wheel; 6. front end cover; 7. spline shaft; 8. bearing; 9. bearing end cover; 10. sealing ring; 11. spacer; 12. thrust bearing; 13. disc spring; 14. roller bearing; 15. T-bar; 151. groove; 16. adjustment rod; 161. annular groove; 162. eccentric rod; 17. positioning bolt; 18. slide rail. DETAILED DESCRIPTION

[0033] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0034] like Figure 1-Figure 3 As shown, a preferred embodiment of the present invention proposes a thread rolling machine spindle 4 mounting structure, which is provided with two spindle 4 mounting structures in the thread rolling machine. Each spindle 4 mounting structure has a thread rolling wheel 5, and the workpiece is thread rolled by two thread rolling machines.

[0035] Specifically, the main shaft 4 installation structure mainly includes the adjustment plate 1, the front support block 2, the rear support block 3, the main shaft 4, the thrust bearing 12, the disc spring 13 and other components.

[0036] like Figure 1 As shown, the front support block 2 and the rear support block 3 support the front end and the rear end of the main shaft 4 respectively, and the front end and the rear end of the main shaft 4 are rotatably connected to the front support block 2 and the rear support block 3 respectively.

[0037] refer to Figure 1-Figure 3 The front support block 2 has a circular hole, within which are two bearings 8 equipped with two rings of needle rollers. The front end of the main shaft 4 is rotatably connected to the front support block 2 via the two bearings 8. A spacer sleeve 11 is provided between the main shaft 4 and the two bearings 8. The spacer sleeve 11 is mounted on the main shaft 4 to reduce wear on the main shaft 4. A bearing end cap 9 is provided at the front and rear ends of the front support block 2, sealingly securing the two bearings 8 within the front support block 2. The bearing end caps 9 are bolted to the front support block 2.

[0038] A sealing ring 10 is provided between the bearing end cover 9 and the main shaft 4 to play a sealing role.

[0039] refer to Figure 5The rear support block 3 has two cavities: a first cavity 301 and a second cavity 302. The first cavity 301 is connected by a through hole 303. The diameter of the through hole 303 is smaller than that of the first cavity 301 and the second cavity 302, and is consistent with the diameter of the rear end of the spindle 4. Therefore, the cross-section of the entire cavity in the rear support block 3 presents an "I" shape.

[0040] refer to Figure 3 、 Figure 4 Two thrust bearings 12 are provided, one located in the first cavity 301 and the other in the second cavity 302. Two bearings 8 are also located in the first cavity 301, each with two rings of needle rollers. A roller bearing 14 is located in the second cavity 302. The disc spring 13 is located in the second cavity 302, between the thrust bearing 12 and the roller bearing 14. The roller bearing 14 bears the combined axial and radial loads of the main shaft 4, reducing friction during its rotation.

[0041] The rear end of the main shaft 4 passes through the first cavity 301, the through hole 303, and the second cavity 302. Specifically, the rear end of the main shaft 4 passes through two bearings 8, two thrust bearings 12, a disc spring 13, and a roller bearing 14 in sequence, and is finally connected to the spline shaft 7 through a coupling. The spline shaft 7 is then connected to the drive mechanism, which drives the spline shaft 7 to rotate, thereby driving the rotation of the main shaft 4.

[0042] The front and rear ends of the rear support block 3 are each provided with a bearing end cover 9 for sealing and fixing the bearing 8 in the cavity in the rear support block 3. A sealing ring 10 is also provided between the bearing end cover 9 and the main shaft 4 to play a sealing role.

[0043] The front end of the main shaft 4 is provided with a front end cover 6, which is located at the front end of the front support block 2 and is fixed to the front end of the main shaft 4 by screws, and is used to limit the front end of the main shaft 4.

[0044] The thrust bearing 12 is used to bear and balance the axial force of the main shaft 4. Since an axial gap may appear between the main shaft 4 and the thrust bearing 12 during operation, the disc spring 13 applies an axial force to the thrust bearing 12, so that the thrust bearing 12 is always close to the main shaft 4 and positioned.

[0045] The thread rolling wheel 5 is mounted on the main shaft 4 and is located between the front support block 2 and the rear support block 3. It rotates along with the main shaft 4 and is used to perform thread rolling processing on the workpiece.

[0046] The front support block 2 is movably mounted on the front side of the adjustment plate 1 , and the rear support block 3 is fixedly mounted on the front side of the adjustment plate 1 by bolts.

[0047] refer to Figure 6Two T-slots 101 and two chutes 102 are provided at the front end of the front side of the adjusting plate 1. The two chutes 102 are located between the two T-slots 101 and are parallel to each other.

[0048] Simultaneously, two slide rails 18 are provided on the back of the front support block 2. The slide rails 18 are fixedly mounted on the front support block 2 by screws, and the slide rails 18 are slidably connected to the chute 102. The front support block 2 is mounted on the adjustment plate 1 by the slide rails 18 so as to slide horizontally.

[0049] Continue to refer Figure 6 Two T-shaped rods 15 are also provided on the back of the front support block 2. These rods 15 correspond to the two T-shaped slots 101. One end of the T-shaped slot 101 is through, allowing the rods 15 to be inserted into the T-shaped slot 101 from the through end. The T-shaped rods 15 are pluggable with the front support block 2. Correspondingly, a socket (not shown) is provided on the back of the front support block 2.

[0050] Positioning bolts 17 and adjustment rods 16 are threadedly connected to the top, bottom, and front end of the front support block 2. There are two positioning bolts 17 and two adjustment rods 16, each corresponding to the two T-bars 15. Correspondingly, threaded holes are formed in the top, bottom, and front end of the front support block 2.

[0051] The insertion hole and the bolt holes corresponding to the positioning bolt 17 and the adjusting rod 16 are interconnected and perpendicular to each other.

[0052] like Figure 7 、 Figure 8 As shown, there is a circle of annular groove 161 on the outer circumference of the adjusting rod 16, and there is a groove 151 on the T-shaped rod 15. The positioning bolt 17 will be engaged with the annular groove 161, and the adjusting rod 16 will be engaged with the groove 151 on the T-shaped rod 15.

[0053] refer to Figure 9 , an eccentric rod 162 is provided at the front end of the adjusting rod 16 , and the eccentric rod 162 is eccentrically arranged with respect to the adjusting rod 16 .

[0054] When the front support block 2 is installed, the slide rail 18 on the back of the front support block 2 is horizontally inserted into the slide groove 102. At the same time, the T-shaped end of the T-shaped rod 15 connected to the socket on the back of the front support block 2 is horizontally inserted into the T-shaped slot 101 and can slide relative to the T-shaped slot 101.

[0055] After the front support block 2 is in place, the adjusting rod 16 is rotated. During the rotation process, the eccentric rod 162 at the front end of the adjusting rod 16 presses against the inner wall of the groove 151 on the T-bar 15, exerting an axial force on the T-bar 15. The static friction between the T-shaped end of the T-bar 15 and the T-slot 101 increases, and the T-bar 15 cannot slide relative to the T-slot 101, thereby fixing the front support block 2 to the adjusting plate 1. Then, the positioning bolt 17 is rotated, and the positioning bolt 17 engages with the annular groove 161, limiting the axial position of the adjusting rod 16.

[0056] Since the width of the annular groove 161 is slightly larger than the diameter of the positioning bolt 17, it is not necessary to unscrew the positioning bolt 17 during actual assembly. Instead, the adjusting rod 16 only needs to be slightly loosened. The eccentric rod 162 on the adjusting rod 16 will then be out of contact with the inner wall of the groove 151 on the T-bar 15. This will remove the axial force of the T-bar 15, thereby reducing the static friction between the T-bar 15 and the T-slot 101. The T-bar 15 can then easily slide out of the T-slot 101, allowing the front support block 2 to be removed. This makes it easier to quickly install the thread rolling wheel 5 on the main shaft 4.

[0057] The annular groove 161 exists to prevent the positioning bolt 17 from interfering with the adjusting rod 16 during its rotation.

[0058] The above technical solutions only reflect the preferred technical solutions of the present utility model. Any changes that may be made to certain parts thereof by technicians in this technical field all reflect the principles of the present utility model and fall within the scope of protection of the present utility model.

Claims

1. A thread rolling machine spindle mounting structure, characterized in that: include: Adjustment plate (1); A front support block (2), the front support block (2) being detachably mounted on the side of the adjustment plate (1) and capable of supporting the front end of the main shaft (4); A rear support block (3), the rear support block (3) being mounted on the side of the adjustment plate (1) and capable of supporting the rear end of the main shaft (4); A main shaft (4), wherein the front end of the main shaft (4) is rotatably connected to the front support block (2) via a bearing (8), and the rear end of the main shaft (4) is rotatably connected to the rear support block (3) via a bearing (8); A thread rolling wheel (5), the thread rolling wheel (5) being mounted on the main shaft (4) and located between the front support block (2) and the rear support block (3); A thrust bearing (12) and a disc spring (13) are provided inside the rear support block (3); the thrust bearing (12) is mounted on the main shaft (4); the disc spring (13) can apply an axial force to the main shaft (4) so that the main shaft (4) is in close contact with the thrust bearing (12); a front end cover (6) is provided at the front end of the main shaft (4); the front end cover (6) is located outside the front support block (2) and is fixedly connected to the main shaft (4) by screws.

2. A thread rolling machine spindle mounting structure according to claim 1, characterized in that: The side of the adjustment plate (1) is provided with a T-shaped slot (101), the back of the front support block (2) is provided with a T-shaped rod (15) slidably connected to the T-shaped slot (101), the front end surface of the front support block (2) is threadedly connected to an adjustment rod (16), one end of the T-shaped rod (15) is inserted into the front support block (2) and can be engaged with the adjustment rod (16), and the adjustment rod (16) can adjust the axial displacement of the T-shaped rod (15) to adjust the static friction between the T-shaped end of the T-shaped rod (15) and the T-shaped slot (101).

3. The thread rolling machine main shaft mounting structure according to claim 2, characterized in that: The front end of the adjusting rod (16) is provided with an eccentric rod (162), the eccentric rod (162) and the adjusting rod (16) are eccentrically arranged, and the T-shaped rod (15) is provided with a groove (151) engaged with the eccentric rod (162).

4. The thread rolling machine main shaft mounting structure according to claim 2, characterized in that: The top surface of the front support block (2) is threadedly connected to a positioning bolt (17), and the outer peripheral surface of the adjustment rod (16) has an annular groove (161) capable of being engaged with the positioning bolt (17).

5. The thread rolling machine main shaft mounting structure according to claim 1, characterized in that: A slide rail (18) is provided on the back of the front support block (2), a slide groove (102) is provided on the side of the adjustment plate (1), and the slide rail (18) is slidably connected to the slide groove (102).

6. The thread rolling machine main shaft mounting structure according to claim 1, characterized in that: Bearing end covers (9) for sealing and fixing the bearings (8) are provided on both the front and rear sides of the front support block (2) and the rear support block (3).

7. The thread rolling machine main shaft mounting structure according to claim 6, characterized in that: A spacer sleeve (11) is provided between the front end of the main shaft (4) and the bearing (8) in the front support block (2), a sealing ring (10) is provided between the spacer sleeve (11) and the bearing end cover (9), and a sealing ring (10) is provided between the bearing end cover (9) on the rear support block (3) and the main shaft (4).

8. The thread rolling machine main shaft mounting structure according to claim 1, characterized in that: A first cavity (301) and a second cavity (302) are formed in the rear support block (3); the first cavity (301) and the second cavity (302) are connected by a through hole (303); the diameter of the through hole (303) is smaller than the diameters of the first cavity (301) and the second cavity (302); thrust bearings (12) are provided in both the first cavity (301) and the second cavity (302); and the disc spring (13) is located in the second cavity (302).

9. The thread rolling machine main shaft mounting structure according to claim 8, characterized in that: A roller bearing (14) is provided in the second cavity (302), and the disc spring (13) is located between the thrust bearing (12) and the roller bearing (14).

10. The thread rolling machine main shaft mounting structure according to claim 1, characterized in that: The rear end of the main shaft (4) is connected to a spline shaft (7), and the spline shaft (7) is used to be connected to a driving mechanism.

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