Dust-proof rotating device

Abstract

The utility model relates to a rotating device to solve the technical problem that the existing rotating device has a relatively simple structure and is difficult to be applied to occasions with large axial loads. The utility model provides a dustproof rotating device, including a bearing seat with a stepped through hole, and a top cover is provided on the top of the bearing seat for sealing; a stepped connecting shaft is installed in the stepped through hole of the bearing seat; a plurality of blocks are provided in the small end of the stepped through hole of the mounting section; a deep groove ball bearing and an angular contact ball bearing distributed on both sides of the block are sleeved on the small end of the stepped shaft of the mounting section; an elastic retaining ring for the shaft is provided at one end of the deep groove ball bearing, and the elastic retaining ring for the shaft is embedded in the small end of the stepped shaft of the mounting section; one end of the angular contact ball shaft is fitted with the large end face of the stepped shaft of the mounting section; a sealing ring is sleeved on the large end of the stepped shaft of the mounting section, and the outer ring of the sealing ring is fitted with the inner wall of the stepped through hole of the mounting section; a labyrinth sealing gap is provided between the mating step shaft and the mating step through hole.

Description

Technical Field

[0001] The utility model relates to a rotating device, in particular to a dustproof rotating device. Background Art

[0002] In the shot peening process, in order to ensure that the workpiece to be processed remains stable when impacted by high-speed projectiles and to avoid affecting the shot peening effect due to uneven force or movement, a parts clamping system is needed. The currently commonly used parts clamping system mainly consists of a clamping device and a rotating device. When using the parts clamping system to fix the workpiece to be processed, it is necessary to place the workpiece to be processed on top of the rotating device, and then use the clamping device to clamp the workpiece to be processed; during the shot peening process, the clamping device drives the workpiece to be processed to rotate, and the rotating device rotates synchronously with the workpiece to be processed.

[0003] Since there are a large number of broken steel shot and steel powder in the shot peening process, the broken steel shot and steel powder can easily enter the rotating device, causing the rotating device to be stuck or even stuck, seriously affecting the stability and efficiency of the shot peening process. The Chinese patent document with the publication number CN214305286U discloses a waterproof and dustproof structure of a rotating device, including a rotating part, a mounting base, an annular ring, a sealing gasket, and a supporting gasket; a circle of annular protrusions is arranged at the bottom of the outer edge of the rotating part, and an annular groove matching the annular protrusion is arranged on the annular ring, and the annular protrusion is stuck in the annular groove, and the rotating part and the annular ring form a labyrinth groove structure, the rotating part is arranged inside the mounting base, and can rotate inside the mounting base, and a plurality of drainage holes are arranged circumferentially on the mounting base, the sealing gasket is located in the innermost circle of the labyrinth groove structure, and is sleeved on the rotating part, and the supporting gasket is installed between the sealing gasket and the mounting base. It also includes a bearing, which is located between the mounting base and the rotating part, and the rotating part can rotate in the bearing. In this technical solution, the rotating part and the annular ring form a labyrinth structure with waterproof function; a cavity is formed between the rotating part and the mounting base, which is a drainage buffer zone. When the water flow is large or dust accumulates in the water, it accumulates in this cavity; a number of drainage holes are arranged circumferentially on the mounting base to drain the water or water-dust mixture accumulated in the cavity. However, the technical solution has the disadvantage that the structure of its rotating device is relatively simple and it is difficult to be applied to occasions with large axial loads. Utility Model Content

[0004] The purpose of the utility model is to solve the technical problems in the prior art that broken steel shots and steel powder can easily enter the interior of a rotating device, causing the rotating device to become stuck or even stuck, seriously affecting the stability and efficiency of the shot peening process, or that the rotating device is difficult to be used in occasions with large axial loads, and to provide a dustproof rotating device.

[0005] In order to solve the above technical problems, the technical solutions provided by the utility model are as follows:

[0006] A dust-proof rotating device, which is special in that:

[0007] It comprises a bearing seat with a stepped through hole in the middle, a top cover is sealed on the top of the bearing seat; a stepped connecting shaft is installed on the bearing seat through the stepped through hole;

[0008] The stepped connecting shaft includes a mounting section stepped shaft, a matching section stepped shaft, and a connecting shaft connected to the part protection tooling in sequence from top to bottom; the stepped through hole includes a mounting section stepped through hole and a matching section stepped through hole corresponding to the mounting section stepped shaft and the matching section stepped shaft respectively;

[0009] The bearing seat is provided with a plurality of stoppers which are located in the small end of the step through hole of the installation section and are evenly distributed along the circumference; the small end of the step shaft of the installation section is sleeved with a deep groove ball bearing and an angular contact ball bearing which are fitted and distributed on both sides of the stoppers;

[0010] The outer rings of the deep groove ball bearing and the angular contact ball bearing are both fitted with the inner wall of the small end of the stepped through hole of the installation section; the end of the deep groove ball bearing away from the stopper is fitted with a shaft elastic retaining ring, which is embedded in the small end of the stepped shaft of the installation section; the end of the angular contact ball bearing away from the stopper is fitted with the large end face of the stepped shaft of the installation section;

[0011] A sealing ring is sleeved on the large end of the step shaft of the installation section, and the outer ring of the sealing ring fits with the inner wall of the step through hole of the installation section;

[0012] A labyrinth sealing gap is arranged between the matching section stepped shaft and the matching section stepped through hole.

[0013] Furthermore, the outer edge of the top cover extends downward to form a lowered edge, and the inner side wall of the lowered edge is in contact with the outer side wall of the bearing seat;

[0014] The top of the bearing seat is provided with a rib distributed at the edge of the stepped through hole opening, and the bottom of the top cover is provided with a pit matched with the rib.

[0015] Furthermore, the top cover is connected to the bearing seat by a plurality of screws.

[0016] Furthermore, the sealing ring is two double-lip skeleton dustproof sealing rings, which are fitted with each other, with their lips arranged back to back, one side of the skeleton fitting with the inner wall of the stepped through hole of the mounting section, and the double lips fitting with the outer wall of the large end of the stepped shaft of the mounting section, and one of the two double-lip skeleton dustproof sealing rings located on the upper side abuts against the step surface of the stepped through hole of the mounting section.

[0017] Furthermore, an internal threaded hole is provided at the bottom of the stepped connecting shaft for connection with a parts protection tooling.

[0018] Furthermore, the connecting shaft of the stepped connecting shaft is provided with symmetrically distributed deep holes.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] 1. The dustproof rotating device provided by the utility model realizes sealing of the interior of the bearing seat through the top cover, the sealing ring, and the mating step shaft and the mating step through hole that cooperate with each other, thereby preventing the broken steel shot particles and steel powder from entering the interior of the bearing seat from the top or bottom of the bearing seat during the shot peening process; thereby avoiding the risk of the rotating device getting stuck or even stuck during use; at the same time, the use of deep groove ball bearings and angular contact ball bearings can make the rotating device bear axial and radial loads at the same time, thereby improving the application range of the dustproof rotating device.

[0021] 2. The dust-proof rotating device provided by the utility model has a lower flip edge arranged on the outer edge of the top cover, and the lower flip edge fits against the outer wall of the bearing seat, so that the crushed steel shots perpendicular to the axial outer wall of the bearing seat can be rebounded, thereby preventing the crushed steel shots and steel powder from entering the bearing seat; the rib cooperates with the pit to block the steel powder entering from between the lower flip edge and the outer wall of the bearing seat, thereby preventing the steel powder from entering the interior of the bearing seat.

[0022] 3. The dustproof rotating device provided by the utility model is provided with two skeleton dustproof sealing rings with lips arranged back to back. The lip of one skeleton dustproof sealing ring is upward, which is used to prevent the lubricating grease of the bearing from flowing out and to prevent steel powder from entering the bearing from the lower end; the lip of the other skeleton dustproof sealing ring is downward, which is used to prevent steel powder from entering the inside of the bearing seat from the lower end. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the top cover in the embodiment of the utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the stepped connecting shaft in the embodiment of the utility model;

[0026] Figure 4 It is a schematic structural diagram of the bearing seat in the embodiment of the utility model.

[0027] Explanation of the accompanying drawings: 1-top cover, 11-lower edge, 12-pit, 2-elastic retaining ring for shaft, 3-deep groove ball bearing, 4-angular contact ball bearing, 5-sealing ring, 6-bearing seat, 61-stepped through hole, 611-installing section stepped through hole, 612-matching section stepped through hole, 62-stopper, 63-retaining edge, 7-stepped connecting shaft, 71-installing section stepped shaft, 72-matching section stepped shaft, 73-connecting shaft, 731-inner threaded hole, 732-deep hole, 8-screw, 9-labyrinth sealing gap. DETAILED DESCRIPTION

[0028] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] like Figure 1 and Figure 2 As shown, a dustproof rotating device includes a bearing seat 6 with a stepped through hole 61 in the middle. In order to prevent steel shot and steel powder from entering the deep groove ball bearing from the upper end and causing the bearing to get stuck, a top cover 1 is sealed on the top of the bearing seat 6; because in the normal working process, more than 98% of the movement direction of the broken steel shot is substantially perpendicular to the axial outer wall of the bearing seat 6, therefore, the outer edge of the top cover 1 extends downward to form a lower turn edge 11, and the inner side wall of the lower turn edge 11 is in contact with the outer side wall of the bearing seat 6; the broken steel shot can be blocked from rebounding by the lower turn edge 11 of the top cover 1; Figure 1 and Figure 4 As shown, in order to prevent a small amount of broken steel shots and steel powder from entering from bottom to top along the outer wall of the bearing seat 6, the principle of labyrinth sealing is utilized, and a rib 63 distributed at the opening edge of the stepped through hole 61 is provided on the top of the bearing seat 6, and a pit 12 cooperating with the rib 63 is provided at the bottom of the top cover 1; a labyrinth seal is formed by the cooperation between the rib 63 and the pit 12; at the same time, the top cover 1 is fixed to the top of the bearing seat 6 by a plurality of screws 8.

[0030] like Figure 1 As shown, the bearing seat 6 is mounted with a stepped connecting shaft 7 through a stepped through hole 61;

[0031] like Figure 3 As shown, the stepped connecting shaft 7 includes an installation section stepped shaft 71, a matching section stepped shaft 72, and a connecting shaft 73 for connecting with the part protection tooling, which are sequentially connected from top to bottom; Figure 4 As shown, the stepped through hole 61 includes a mounting section stepped through hole 611 and a matching section stepped through hole 612 corresponding to the mounting section stepped shaft 71 and the matching section stepped shaft 72 respectively;

[0032] like Figure 1 and Figure 4As shown, the interior of the bearing seat 6 is provided with a plurality of blocks 62 which are located in the small end of the stepped through hole 611 of the mounting section and are evenly distributed along the circumferential direction; the small end of the stepped shaft 71 of the mounting section is sleeved with a deep groove ball bearing 3 and an angular contact ball bearing 4 which are fitted and distributed on both sides of the block 62; since the stepped connecting shaft 7 will rotate relative to the bearing seat 6 during the operation of the dustproof rotating device, the deep groove ball bearing 3 is selected to reduce the friction resistance between the stepped connecting shaft 7 and the bearing seat 6; and the stepped connecting shaft 7 will also be subjected to an axial upward force during the operation of the dustproof rotating device, and the angular contact ball bearing 4 is selected to withstand the loads acting simultaneously in the axial and radial directions.

[0033] like Figure 1 As shown, the outer rings of the deep groove ball bearing 3 and the angular contact ball bearing 4 are both fitted with the inner wall of the small end of the stepped through hole 611 of the mounting section; an elastic circlip 2 for the shaft is fitted on the end of the deep groove ball bearing 3 away from the stopper 62, and the elastic circlip 2 for the shaft is embedded in the small end of the stepped shaft 71 of the mounting section; the elastic circlip 2 for the shaft is used to fix the relative position between the deep groove ball bearing and the stepped connecting shaft 7, and the elastic circlip 2 for the shaft cooperates with the stopper 62 to prevent the stepped connecting shaft 7 from falling off downward.

[0034] like Figure 1 As shown, one end of the angular contact ball bearing 4 away from the stopper 62 is in contact with the large end surface of the mounting section stepped shaft 71; by using the angular contact ball bearing 4, the dustproof rotating device can withstand axial and radial loads acting simultaneously.

[0035] like Figure 1 As shown, a sealing ring 5 is sleeved on the large end of the mounting section stepped shaft 71, and the outer rings of the sealing ring 5 are both fitted with the inner wall of the mounting section stepped through hole 611; the two sealing rings 5 ​​are double-lip skeleton dustproof sealing rings, and the two skeleton dustproof sealing rings fit each other, with their lips arranged back to back, one side of the skeleton fits with the inner wall of the mounting section stepped through hole 611, and the double lips fit with the outer wall of the large end of the mounting section stepped shaft 71, and the lip of one skeleton dustproof sealing ring faces upward to prevent the bearing lubricating grease from flowing out and prevent steel powder from entering the bearing from the lower end; the lip of the other skeleton dustproof sealing ring faces downward, and its main purpose is to prevent steel powder from entering the inside of the bearing from the lower end, causing the bearing to get stuck.

[0036] like Figure 1 As shown, in order to prevent the crushed steel shots and steel powder from entering the bearing seat 6 from the lower end of the step connecting shaft 7 and the bearing seat 6, a labyrinth sealing gap 9 is provided between the mating section step shaft 72 and the mating section step through hole 612, and the crushed steel shots and steel powder are blocked by the labyrinth sealing.

[0037] like Figure 1 and Figure 3 As shown, an internal threaded hole 731 is provided at the bottom of the stepped connecting shaft 7 for connecting with a part protection tool or a gland tool.

[0038] like Figure 1 and Figure 3 As shown, the connecting shaft 73 of the stepped connecting shaft 7 is provided with symmetrically distributed deep holes 732. When installing the parts protection tooling or the gland tooling at its lower end, the pipe fitting is inserted into the deep hole 732, and then the stepped connecting shaft 7 is pulled by hand to prevent rotation, thereby achieving the purpose of convenient installation.

[0039] The installation method of the dustproof rotating device of the utility model is:

[0040] First, install the deep groove ball bearing 3 above the inner stopper 62 at the small end of the stepped through hole 611 of the mounting section of the bearing seat 6, and install the angular contact ball bearing 4 below the inner stopper 62 at the small end of the stepped through hole 611 of the mounting section of the bearing seat 6; install two skeleton dustproof sealing rings into the large end of the stepped through hole 611 of the mounting section of the bearing seat 6 with their lips facing each other;

[0041] Secondly, the stepped connecting shaft 7 is passed through the skeleton dustproof seal ring, the angular contact ball bearing 4 and the deep groove ball bearing 3 from bottom to top, and the mating section stepped shaft 72 of the stepped connecting shaft 7 is installed into the mating section stepped through hole 612 of the bearing seat 6;

[0042] Then, the shaft elastic retaining ring 2 is embedded into the stepped connecting shaft 7 to fix the stepped connecting shaft 7;

[0043] Finally, the top cover 1 is installed on the bearing seat 6 by means of a plurality of screws 8, thereby completing the assembly of the dustproof rotating device.

[0044] When in use, the dustproof rotating device of the utility model is connected to the part protection tooling through the internal threaded hole 731 at the lower end of the connecting shaft 73; the part to be processed is placed above the top cover 1, and the part to be processed is pressed against the top cover 1 by the cylinder of the part protection tooling, the part to be processed rotates with the part protection tooling, and the dustproof rotating device rotates synchronously with the part to be processed.

[0045] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or replacements within the technical scope disclosed in the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope recorded in the claims.

Claims

1. A dust-proof rotating device, characterized in that: It comprises a bearing seat (6) with a stepped through hole (61) in the middle, and a top cover (1) is provided on the top of the bearing seat (6) in a sealed manner; a stepped connecting shaft (7) is installed on the bearing seat (6) through the stepped through hole (61); The stepped connecting shaft (7) comprises a mounting section stepped shaft (71), a matching section stepped shaft (72) connected in sequence from top to bottom, and a connecting shaft (73) used for connecting to a parts protection tooling; the stepped through hole (61) comprises a mounting section stepped through hole (611) and a matching section stepped through hole (612) corresponding to the mounting section stepped shaft (71) and the matching section stepped shaft (72), respectively; The bearing seat (6) is provided with a plurality of stoppers (62) located in the small end of the mounting section stepped through hole (611) and evenly distributed along the circumferential direction; the small end of the mounting section stepped shaft (71) is sleeved with a deep groove ball bearing (3) and an angular contact ball bearing (4) which are closely distributed on both sides of the stoppers (62); The outer rings of the deep groove ball bearing (3) and the angular contact ball bearing (4) are both fitted with the inner wall of the small end of the stepped through hole (611) of the mounting section; an end of the deep groove ball bearing (3) away from the stopper (62) is fitted with a shaft elastic retaining ring (2), and the shaft elastic retaining ring (2) is embedded in the small end of the stepped shaft (71) of the mounting section; an end of the angular contact ball bearing (4) away from the stopper (62) is fitted with the large end face of the stepped shaft (71) of the mounting section; A sealing ring (5) is sleeved on the large end of the mounting section stepped shaft (71), and the outer ring of the sealing ring (5) is in contact with the inner wall of the mounting section stepped through hole (611); A labyrinth sealing gap (9) is provided between the matching section stepped shaft (72) and the matching section stepped through hole (612).

2. The dust-proof rotating device according to claim 1, characterized in that: The outer edge of the top cover (1) extends downward to form a lower folded edge (11), and the inner side wall of the lower folded edge (11) is in contact with the outer side wall of the bearing seat (6); The top of the bearing seat (6) is provided with a rib (63) distributed at the opening edge of the stepped through hole (61), and the bottom of the top cover (1) is provided with a recess (12) that matches the rib (63).

3. The dust-proof rotating device according to any one of claims 1-2, characterized in that: The top cover (1) is connected to the bearing seat (6) via a plurality of screws (8).

4. The dust-proof rotating device according to claim 1, characterized in that: The sealing ring (5) is two double-lip skeleton dustproof sealing rings, which fit each other, with their lips facing each other, one side of the skeleton fitting against the inner wall of the mounting section stepped through hole (611), and the double lips fitting against the outer wall of the large end of the mounting section stepped shaft (71), and one of the two double-lip skeleton dustproof sealing rings located on the upper side abuts against the step surface of the mounting section stepped through hole (611).

5. The dust-proof rotating device according to claim 1, characterized in that: An internal threaded hole (731) is provided at the bottom of the stepped connecting shaft (7) for connecting with a parts protection tooling.

6. The dust-proof rotating device according to claim 5, characterized in that: The connection shaft (73) of the stepped connection shaft (7) is provided with symmetrically distributed deep holes (732).

Images