Cross bearing with stop-go round head groove

Abstract

The utility model belongs to the technical field of bearings, and discloses a cross bearing with a pass-stop round head groove, which comprises an inner ring and an outer ring arranged on the periphery of the inner ring, a roller is arranged between the inner ring and the outer ring, and the cross bearing comprises the round head pass-stop groove which is arranged along the end face of the inner ring from the outer diameter to the inner diameter; the bottom of the round-head through-stopping groove is a circular arc, and the arc-shaped opening of the circular arc faces the outer diameter direction of the inner ring; the round-head slot wedge block is matched with the round-head through-stopping slot and is embedded into and blocks the round-head through-stopping slot; and the round head slot wedge block is provided with a round head matched with the concave arc of the arc stop slot. According to the utility model, the round-head through-stopping groove is processed by a formed milling cutter, no extra process flow is needed for processing corner edges, the process is simple, and the processing precision and the processing efficiency are improved.

Description

Technical Field

[0001] This utility model belongs to the field of bearing technology and relates to a cross bearing with a stop-through round head groove. Background Technology

[0002] Crossed bearings are widely used in robot reducers and joints. To house rolling elements, a wedge groove is typically cut into the end face of the inner ring. Depending on the wall thickness of the bearing rings and the distribution of the mounting holes, the wedge groove can be designed as either a through groove or a check groove. For thicker rings, a check groove is generally cut into the end face of the inner ring.

[0003] Currently, most of the stop grooves on the inner ring end face are square with corner overrun grooves, such as... Figure 1 The overrun groove is a concave arc milled according to the diameter of the milling cutter. This type of groove can ensure the assembly requirements of the bearing, but the machining process is complicated, and the overrun groove is exposed on the end face, which affects the overall aesthetics of the bearing. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model proposes a cross bearing with a stop-through round head groove.

[0005] This utility model is achieved through the following technical solution: a cross bearing with a stop-go round head groove, comprising an inner ring and an outer ring disposed on its outer periphery, with rollers installed between the two, including...

[0006] The round-headed stop groove is opened along the inner ring end face from the outer diameter to the inner diameter; the bottom of the round-headed stop groove is an arc, and the arc-shaped opening faces the outer diameter of the inner ring.

[0007] A round-headed groove wedge, matching a round-headed stop groove, is embedded in and seals the round-headed stop groove; the round-headed groove wedge has a round head that matches the concave arc of the arc stop groove.

[0008] According to this utility model, the round-headed stop groove and the round-headed groove wedge block are detachably fixed by a fixing member.

[0009] According to this utility model, the groove width B of the round-head stop groove is 1.5-1.8 times the diameter of the roller; the arc radius R of the round-head stop groove is half of the groove width B.

[0010] According to this utility model, the width B1 of the round-headed groove wedge is 0.02-0.04 mm smaller than the groove width B of the round-headed stop groove.

[0011] According to this utility model, the bottom arc R1 of the round-headed groove wedge is 0.4-0.5mm smaller than the radius of the concave arc of the round-headed stop groove, the length L1 of the round-headed groove wedge corresponds to the length L of the round-headed stop groove, and after assembly, the surfaces of the two located on the outer diameter side of the inner ring are on the same plane.

[0012] According to this utility model, a threaded hole is opened at the lower position of the round head stop groove, and a threaded hole matching the round head stop groove is opened at the lower position of the round head groove wedge. After the round head groove wedge is embedded in the round head stop groove, the fixing member passes through the threaded holes of both to achieve relative fixation of the two.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1) Aesthetics: After the round-headed groove wedge is assembled, there is no obvious groove on the end face, which improves the overall aesthetics of the bearing;

[0015] 2) Processability: The round-head stop groove is machined with a forming milling cutter, eliminating the need for additional processing steps to handle the corner edges. This simplifies the process and improves machining accuracy and efficiency.

[0016] 3) Operability: The round head of the round head groove wedge and the bottom arc of the round head stop groove make it easy to install and adjust. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a cross bearing with a square overrun groove in the prior art;

[0018] Figure 2 This is a first-view structural schematic diagram of the cross bearing with a stop-through round head groove of this utility model;

[0019] Figure 3 This is a second-view structural schematic diagram of the cross bearing with a stop-through round head groove according to the present invention;

[0020] Figure 4 This is a first-view structural schematic diagram of the inner ring of the cross bearing with a stop-through round head groove according to the present invention.

[0021] Figure 5 This is a second-view structural schematic diagram of the inner ring of the cross bearing with a stop-through round head groove according to the present invention.

[0022] Figure 6 This is a first-view structural schematic diagram of the groove wedge block of this utility model;

[0023] Figure 7 This is a structural schematic diagram of the groove wedge block of this utility model from a second perspective.

[0024] Among them, 1-outer ring, 2-inner ring, 21-round head stop groove, 3-roller, 4-round head groove wedge, 41-round head, 5-screw. Detailed Implementation

[0025] To facilitate understanding of the utility model's objectives and effects, the specific embodiments of the utility model are as follows, in conjunction with the accompanying drawings:

[0026] like Figure 2-7 As shown, a cross bearing with a stop groove is provided, including an inner ring 2 and an outer ring 1 disposed on its outer periphery, with rollers 3 installed between the two. In order to facilitate the installation of the rollers 3, a stop groove 21 is opened on the end face of the inner ring 2 from the outer diameter to the inner diameter. After the rollers 3 are installed, the groove opening of the stop groove 21 is sealed by a wedge block 4 that matches the stop groove 21, thereby realizing the assembly of the cross bearing.

[0027] The bottom of the round-head stop groove 21 is a concave arc, with the starting points of the two ends of the concave arc in the X direction marked as C and D respectively. The arc-shaped opening faces the outer diameter of the inner ring 2. The groove width B of the round-head stop groove 21 is 1.5 to 1.8 times the diameter of the roller 3. Here, the groove width B is based on... Figure 2 The X direction is taken as the reference; to facilitate the selection of readily available cutting tools, the groove width B is generally taken as an integer such as 5, 6, 8, 10. The radius R of the round-head stop groove 21 is half of the groove width B. Since there is no problem with corner edge treatment, it is very convenient to machine. The groove depth H of the round-head stop groove 21 is 0.03-0.05mm deep according to the exact center corner of the V-shaped raceway. Here, the groove depth H is based on... Figure 2 The Y direction is taken as the reference.

[0028] The outer contour of the round-headed groove wedge 4 matches the inner contour of the round-headed stop groove 21. The width B1 of the round-headed groove wedge 4 is 0.02-0.04 mm smaller than the groove width B of the round-headed stop groove. This provides good left and right limiting and ensures the wedge can be smoothly installed from the end face downwards. Simultaneously, to ensure the round-headed groove wedge 4 contacts the bottom of the concave arc of the round-headed stop groove, the bottom arc R1 of the round-headed groove wedge 4 is 0.4-0.5 mm smaller than the radius of the concave arc of the round-headed stop groove. The length L1 of the round-headed groove wedge 4 is generally sufficient to ensure that after the bottom surface of the round-headed groove wedge 4 and the concave arc of the round-headed stop groove are fully engaged, the upper end face of the round-headed groove wedge 4 should not protrude above the bearing end face. The length and thickness H1 are sufficient to ensure that when the round head of the round-headed groove wedge 4 is fully engaged with the concave arc of the round-headed stop groove, the outer diameter of the round-headed groove wedge 4 does not protrude beyond the outer diameter of the inner ring. The width B1 here is... Figure 6 Taking the X1 direction as a reference, the thickness H1 is based on Figure 6 Taking the Y1 direction as the reference, that is... Figure 7 As shown, length L1 is... Figure 6 The Z1 direction is taken as the reference.

[0029] like Figure 6 As shown, the bottom of the round-headed groove wedge 4 is a round head 41 that matches the concave arc of the circular arc stop groove. The round head 41 is made into a chamfered arc shape, and the starting points C1 and D1 of the chamfered edge are 0.3-0.5mm lower than the starting points C and D of the arc of the round-headed stop groove 21. The round head of the round-headed groove wedge 4 and the bottom arc of the round-headed stop groove 21 are in line contact, which facilitates the adjustment of the two.

[0030] To secure the round-headed groove wedge 4 to the round-headed stop groove 21, a threaded hole is made at the bottom of the round-headed stop groove 21. Correspondingly, a threaded hole matching the round-headed stop groove 21 is made at the bottom of the round-headed groove wedge 4. After the round-headed groove wedge 4 is inserted into the round-headed stop groove 21, a screw passes through the threaded holes of both, achieving relative fixation. The screw is a hexagon socket head cap screw, but other options are also acceptable. After the rollers 3 are fully installed into the raceways of the inner and outer rings through the round-headed stop groove 21, the round-headed groove wedge 4 is inserted into the round-headed stop groove 21 from the outer end face of the inner ring 2. After adjusting the position of the groove wedge 4 to ensure rotational flexibility, the connecting screw is tightened, completing the installation.

[0031] The above description is merely a preferred embodiment of this utility model and is not intended to limit this utility model in any form or substance. It should be noted that those skilled in the art can make several improvements and additions without departing from this utility model, and these improvements and additions should also be considered within the protection scope of this utility model. Any modifications, alterations, and equivalent changes made by those skilled in the art based on the above-disclosed technical content without departing from the spirit and scope of this utility model are equivalent embodiments of this utility model. Furthermore, any modifications, alterations, and evolutions made to the above embodiments based on the essential technology of this utility model still fall within the scope of the technical solution of this utility model.

Claims

1. A cross bearing having a stop round head groove, comprising an inner ring and an outer ring provided at the outer periphery thereof, between which a roller is installed, characterized in that, Comprise, The round head stop groove is opened from the outer diameter to the inner diameter direction along the inner ring end face; the bottom of the round head stop groove is a circular arc, and the arc-shaped opening of the circular arc faces the outer diameter direction of the inner ring; The round head groove wedge block is matched with the round head stop groove, is embedded and blocks the round head stop groove; the round head groove wedge block has a round head matched with the concave circular arc of the round head stop groove.

2. The crossed roller bearing with a blind dome groove of claim 1, wherein, The round head stop groove and the round head groove wedge block are detachably fixed through the fixing piece.

3. The crossed roller bearing with a blind dome groove of claim 1 wherein, The groove width B of the round head stop groove is 1.5-1.8 times of the roller diameter; the circular arc radius R of the round head stop groove is half of the groove width B.

4. The crossed roller bearing with a blind dome groove of claim 3, wherein, The width B1 of the round head groove wedge block is 0.02-0.04 mm smaller than the groove width B of the round head stop groove.

5. A cross bearing with a blind boss groove as claimed in claim 3 or 4, characterized in that The bottom circular arc R1 of the round head groove wedge block is 0.4-0.5 mm smaller than the radius of the concave circular arc of the round head stop groove; the length L1 of the round head groove wedge block corresponds to the length L of the round head stop groove, and the surfaces on the outer diameter side of the two after assembly are located on the same plane.

6. The crossed roller bearing with a blind dome groove of claim 2 wherein, The groove bottom threaded hole is opened at the lower position of the round head stop groove, and correspondingly, the threaded hole matched with the round head stop groove is opened at the lower position of the round head groove wedge block; after the round head groove wedge block is embedded in the round head stop groove, the fixing piece penetrates the threaded holes of the two, and the relative fixation of the two is realized.

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