Brake acting on rotating shaft

Abstract

The brake acting on the rotating shaft comprises an annular caliper seat, a caliper groove opened towards the inner arc side is formed in the caliper seat, and a plurality of friction discs opposite to each other one by one and pistons driving the friction discs on the two sides to move relatively are annularly arranged on the two groove sides of the caliper groove. A hydraulic cylinder suitable for axial reciprocating motion of the piston is arranged in the caliper seat, a hydraulic rear cavity is formed between the back face of the piston and the hydraulic cylinder, a brake oil way communicated with the hydraulic rear cavity is formed in the caliper seat, an oil inlet and outlet is formed in one end of the brake oil way, and a loosening structure for pushing the piston to the hydraulic rear cavity is further arranged in the hydraulic cylinder. According to the brake, the rotating shaft in the machine tool is annularly clamped and braked through the whole-circle clamp base and the friction discs distributed in the annular direction, so that the rotating shaft can be evenly stressed, braking is more stable, the problem of loosening of the rotating shaft is avoided, and then the braking efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of brake, concretely is a kind of brake for rotating shaft. BACKGROUND

[0002] Chinese patent document No. CN220902627U was published on May 07, 2024, which discloses a rotating shaft ring type brake. It includes a holder body, which is provided with an inner hole. The inner hole is provided with a movable cold piece. The movable cold piece is connected with a ring-shaped chuck. The top of the chuck is provided with a plurality of clamping blocks. The outer side surface of the clamping block is tapered and cooperates with the inner side of the inner hole of the holder body. The outer side of the holder body is provided with an oil injection hole that communicates with the inner side. The bottom side of the holder body is sealed with a bottom sealing plate. An oil injection cavity is formed between the bottom of the movable cold piece and the bottom sealing plate. Oil can be injected into the oil injection cavity through the oil injection hole on the outside of the holder body, which can make the movable cold piece move away from the bottom sealing plate. A plurality of return springs are provided between the holder body and the piston piece, which can push the piston piece towards the bottom sealing plate. The brake of this structure uses the clamping blocks on the chuck to shrink towards the center to hold the rotating shaft, achieving braking. However, this brake uses a ring type brake. After long-term use, the chuck and the rotating shaft will also wear out, resulting in reduced braking efficiency and affecting the service life. Moreover, the replacement of the entire chuck is costly in terms of maintenance. Therefore, further improvements are needed for the current brake. SUMMARY

[0003] The utility model aims to solve the above-mentioned problems and provide a brake for rotating shaft with simple and reasonable structure.

[0004] The brake for rotating shaft includes a circular ring-shaped clamp seat. An inwardly open clamp groove is formed on the clamp seat. A plurality of opposite friction discs and a piston for driving the two friction discs to move relative to each other are arranged on both sides of the clamp groove. A hydraulic cylinder suitable for the axial reciprocating movement of the piston is formed in the clamp seat. A hydraulic rear cavity is formed between the back of the piston and the hydraulic cylinder. A brake oil path is formed in the clamp seat and communicates with the hydraulic rear cavity. An oil inlet and outlet are formed at one end of the brake oil path. A release structure is also provided in the hydraulic cylinder to push the piston towards the hydraulic rear cavity.

[0005] The purpose of the utility model can also be solved by the following technical measures:

[0006] As a more specific solution, a limiting part is fixedly connected to the clamp seat and is arranged between the piston and the friction disc. The release structure includes a return spring, which is sleeved on the outside of the piston, and the two ends of the return spring abut on the front surface of the piston and the back surface of the limiting part.

[0007] As a further solution, the loosening structure comprises hydraulic oil stored in a hydraulic front cavity formed between the piston front face and the hydraulic cylinder, and the clamp seat is provided with a reset oil passage in communication with the hydraulic front cavity, and the reset oil passage is provided with a second oil inlet / outlet at one end.

[0008] As a further solution, the clamp seat comprises two clamp bodies, recesses are formed on opposite end faces of the two clamp bodies, a clamp groove is formed between the two recesses after the two clamp bodies are connected symmetrically on both sides, and brake oil passages are formed in each clamp body and in communication with a plurality of hydraulic rear cavities.

[0009] As a further solution, the inner wall of the hydraulic cylinder is provided with one or more than one sealing groove arranged at intervals corresponding to the axial movement position of the piston, and each sealing groove is embedded with a sealing ring elastically abutting against the outer wall of the piston.

[0010] As a further solution, the brake oil passages on both sides each comprise a shunt oil passage and a connecting oil passage, each hydraulic rear cavity on each clamp seat is in communication with each other through the shunt oil passage, the shunt oil passages on both sides are in communication with each other through the corresponding connecting oil passages at both positions, and the shunt oil passage or the connecting oil passage on one side is provided with an oil inlet / outlet.

[0011] As a further solution, the shunt oil passage comprises a horizontal oil channel and a vertical oil channel intersecting with each other, and the horizontal oil channel and the vertical oil channel are formed by horizontal drilling from the side wall of the clamp seat; the inner ports of the horizontal oil channel and the vertical oil channel are in communication with the hydraulic rear cavities, and the outer ports of the horizontal oil channel and the vertical oil channel are connected with plug heads;

[0012] The outer port of one horizontal oil channel or vertical oil channel forms the oil inlet / outlet, and the connecting oil passage is formed on the horizontal oil channel or / and vertical oil channel closest to the oil inlet / outlet.

[0013] As a further solution, the brake oil passages on both sides each comprise a shunt oil passage and a connecting oil passage corresponding to the number of hydraulic rear cavities;

[0014] The opposite end faces of the two clamp bodies are each provided with an annular groove, and the two annular grooves are combined to form a shunt oil passage; each connecting oil passage comprises a radial oil channel and a vertical oil channel in communication with each other, the other end of the radial oil channel is in communication with the hydraulic rear cavity, the other end of the vertical oil channel is in communication with the shunt oil passage, and the oil inlet / outlet is formed on any vertical oil channel.

[0015] As a further solution, a plurality of concave cavities are formed in the clamp seat and open to the clamp groove, a retaining ring is tightly connected to the groove side of the clamp groove, the retaining ring and the concave cavities define hydraulic cylinders therebetween, the retaining ring is provided with a through hole corresponding to each hydraulic cylinder and suitable for the convex column of the piston to extend outward, the friction disc is connected to the convex column, and the retaining ring part around the through hole forms a limiting part.

[0016] As a further scheme, the hydraulic cylinder has a supporting protrusion extending on the cylinder bottom corresponding to the back surface of the piston, the back surface of the piston is movably abutted on the supporting protrusion through a loosening structure and is arranged in a spaced manner with the cylinder bottom, and the supporting protrusion is arranged at the center position of the cylinder bottom.

[0017] As a further scheme, the outer ports of the connecting oil paths are each surrounded by a first stepped surface, and when the two clamp bodies are tightly connected, an oil seal ring is pressed between the two first stepped surfaces.

[0018] The brake device for the rotating shaft has the following beneficial effects:

[0019] The brake device for the rotating shaft has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structure schematic diagram of the brake device in the utility model.

[0021] Figure 2 It is a structure schematic diagram of the brake device in the utility model.

[0022] Figure 3 It is a structure schematic diagram of the brake device in the utility model.

[0023] Figure 4 It is a structure schematic diagram of the brake device in the utility model.

[0024] Figure 5 It is a structure schematic diagram of the brake device in the utility model.

[0025] Figure 6 It is Figure 3 It is an enlarged structure schematic diagram of A in the utility model.

[0026] Figure 7 It is a structure schematic diagram of other embodiments of the loosening structure in the utility model.

[0027] Figure 8 It is a structure schematic diagram of the brake device in the utility model.

[0028] Figure 9 It is a structure schematic diagram of the brake device in the utility model.

[0029] Figure 10 It is a structure schematic diagram of the brake device in the utility model.

[0030] Figure 11Another pincer body structure schematic view of embodiment three of the utility model.

[0031] Figure 12 The section position schematic view of embodiment three in the utility model.

[0032] Figure 13 For Figure 12 The section structure schematic view at A-A in the utility model.

[0033] Figure 14 For Figure 12 The section structure schematic view at B-B in the utility model.

[0034] Figure 15 For Figure 12 The section structure schematic view at C-C in the utility model. Specific implementation

[0035] The utility model is further explained in connection with the drawings and embodiments. Embodiment one

[0036] Referring to Figures 1 to 6 As shown in the figure, the brake for rotating shaft, including the circular ring pincer base 1, the pincer groove 101 that opens to the inside arc side is set up on the pincer base 1, the two groove sides of the pincer groove 101 are all annularly arranged with multiple friction disc 2, and the piston 3 that drives two sides friction disc 2 relative movement, the hydraulic cylinder 102 that is suitable for the axial reciprocating movement of piston 3 is set up in the pincer base 1, and the hydraulic rear cavity 103 is formed between the back of piston 3 and the hydraulic cylinder 102, the brake oil circuit 4 that is communicated with the hydraulic rear cavity 103 is set up in the pincer base 1, and the brake oil circuit 4 one end is set up with the oil inlet and outlet 401, and the hydraulic cylinder 102 still is equipped with the loosening structure that pushes piston 3 to the hydraulic rear cavity 103.

[0037] This brake is through the pincer base 1 of whole circle and the annularly full friction disc 2 and carries out annular clamping brake to the rotating shaft in lathe, makes the rotating shaft can be evenly stressed, and the brake is more stable, avoids the problem that the rotating shaft is loose, and further improves brake efficiency, and the friction disc 2 belongs to the vulnerable spare, but can be independently disassembled and replaced, and the use cost is lower relative to the chuck of prior art, can reduce the maintenance cost of brake.

[0038] In the embodiment, the pincer base 1 is fixedly connected with a limiting portion 5, the limiting portion 5 is arranged between the piston 3 and the friction disc 2; the loosening structure comprises a return spring 6, the return spring 6 is sleeved outside the piston 3, and two ends of the return spring 6 abut against the front surface of the piston 3 and the back surface of the limiting portion 5.

[0039] The piston 3 is provided with a spring groove 301, the return spring 6 is arranged in the spring groove 301.

[0040] The caliper seat 1 comprises two caliper bodies 9, recesses 901 are formed on the opposite end faces of the two caliper bodies 9, the two recesses 901 form a caliper groove 101 after the two caliper bodies 9 are symmetrically connected on both sides, and brake oil paths 4 are formed in each caliper body 9 and communicate with a plurality of hydraulic back cavities 103; the caliper seat 1 is divided into two caliper bodies 9, which facilitates the machining of the recesses 901 and the assembly of the pistons 3 and the friction discs 2, and helps to reduce the machining difficulty and improve the production efficiency.

[0041] The inner wall of the hydraulic cylinder 102 is provided with two rows of sealing grooves arranged at intervals corresponding to the axial movement position of the piston 3, and a sealing ring 10 is embedded in each sealing groove and abuts against the outer wall of the piston 3; there are at least two sealing rings 10 cooperating between the piston 3 and the hydraulic cylinder 102 at all times, thereby reducing the probability of oil leakage.

[0042] The brake oil paths 4 on both sides each comprise a shunt oil path 41 and a connecting oil path 42, each hydraulic back cavity 103 on the caliper seat 1 is connected to each other through the shunt oil path 41, the shunt oil paths 41 on both sides are connected to each other through the corresponding connecting oil paths 42 at the positions on both sides, and the shunt oil path 41 or the connecting oil path 42 on one side is provided with an oil inlet and outlet 401; the shunt oil paths 41 on both sides each output or input hydraulic oil through one oil inlet and outlet 401, so that the pressures of the pistons 3 on both sides can be kept the same.

[0043] The shunt oil path 41 comprises a horizontal oil channel 411 and a vertical oil channel 412 which are cross-connected, and the horizontal oil channel 411 and the vertical oil channel 412 are formed by drilling holes horizontally from the side wall of the caliper seat 1; the inner ports of the horizontal oil channel 411 and the vertical oil channel 412 are connected to the hydraulic back cavities 103, and the outer ports of the horizontal oil channel 411 and the vertical oil channel 412 are connected with plug heads 43.

[0044] In the prior art: a rotary shaft ring type brake in CN220902627U, the oil injection cavity is mainly formed by grooving on the surface of the holder body by a lathe and then installing a bottom sealing plate, which increases the risk of oil leakage of the oil injection cavity and requires strict oil sealing structure of the brake; in the present embodiment, each oil channel of the shunt oil path 41 and the connecting oil path 42 is formed by drilling holes in the longitudinal and horizontal directions, which has a simple structure, reduces the assembly process, improves the production efficiency, and has a simple oil sealing structure, low use cost and good sealing performance.

[0045] The plug head 43 mainly comprises a plug ball and a plug screw which blocks the plug ball (not specifically marked in the drawing).

[0046] In the embodiment, the outer port of one longitudinal oil channel 412 forms the access oil port 401, the connecting oil path 42 is provided with two, and the two connecting oil paths 42 are provided at the two intersection positions of the transverse oil channel 411 and the longitudinal oil channel 412 closest to the access oil port 401; the setting mode can make the hydraulic oil enter one side of the shunt oil path 41 from the access oil port 401, can quickly shunt the hydraulic oil to the other side of the shunt oil path 41 through the two connecting oil paths 42, and can make the two sides of the friction disc 2 generate equal pressure at the same time, so that the two sides of the friction disc 2 will not cause uneven braking force of the two sides of the friction disc 2 due to the time difference of shunting.

[0047] The plier seat 1 is provided with a plurality of recess cavities 105 opening towards the plier groove 101, the groove side of the plier groove 101 is fastened and connected with a check ring 11, the check ring 11 and the recess cavity 105 define a hydraulic cylinder 102, the check ring 11 is provided with a through hole 111 corresponding to each hydraulic cylinder 102, the through hole 111 is suitable for the convex column of the piston 3 to extend outward, the friction disc 2 is connected to the convex column, and the part of the check ring 11 around the through hole 111 forms the limiting part 5; the check ring 11 is used for shielding the recess cavity 105 to form the hydraulic cylinder 102, can encapsulate and limit the piston 3, facilitates the installation of the piston 3 and the return spring 6, and simultaneously serves as the limiting part 5 of the return spring 6.

[0048] The check ring 11 is composed of a plurality of arc structures arranged in a ring in the embodiment, and in more embodiments, the check ring 11 can also be a complete ring structure.

[0049] The check ring 11 is provided with a first connecting hole, the plier seat 1 is provided with a second connecting hole corresponding to the first connecting hole, during installation, the check ring 11 is fastened on the plier seat 1 by passing a bolt through the first connecting hole and the second connecting hole; similarly, one of the plier bodies 9 is provided with a third connecting hole, the other plier body 9 is provided with a fourth connecting hole corresponding to the third connecting hole, during installation, the two plier bodies 9 are fastened and connected into one to form the plier seat 1 by passing a bolt through the third connecting hole and the fourth connecting hole (the above connecting holes are not specifically indicated in the drawings).

[0050] The hydraulic cylinder 102 extends the support protrusion 12 corresponding to the bottom of the back of the piston 3, the back of the piston 3 is movably abutted on the support protrusion 12 by loosening structure and is arranged at an interval from the bottom; the support protrusion 12 is arranged at the center position of the bottom; the support protrusion 12 makes the hydraulic cylinder 102 and the piston 3 always keep a certain thickness of the hydraulic rear cavity 103, facilitates the shunt oil path 41 to supply oil into the hydraulic rear cavity 103, prevents the back of the piston 3 from completely abutting the bottom of the hydraulic cylinder 102, and causes the oil inlet of the hydraulic cylinder 102 to be blocked by the piston 3 due to the adhesion of the hydraulic oil, and causes the oil injection to be unsuccessful.

[0051] The outer port of the connecting oil path 42 is surrounded by a first step surface 421, and when the two caliper bodies 9 are tightly connected, the oil seal ring 44 is pressed between the two first step surfaces 421. Embodiment Two

[0052] Embodiment Two differs from Embodiment One in that, as shown in Figure 7 The loosening structure mainly stores hydraulic oil 7 in the hydraulic front cavity 104, and the piston 3 is formed between the front surface and the hydraulic cylinder 102 to form the hydraulic front cavity 104. The caliper seat 1 is provided with a reset oil path 8 in communication with the hydraulic front cavity 104, and the reset oil path 8 is provided with a second oil inlet and outlet 801 at one end.

[0053] When the rotating shaft (brake disc on the rotating shaft) is loosened, the second oil inlet and outlet 801 supplies oil to the reset oil path 8 (the structure of the reset oil path 8 can be referred to the brake oil path 4), the hydraulic oil enters the hydraulic front cavity 104 (at the same time, the brake oil path 4 is drained through the oil inlet and outlet 401), and the hydraulic oil pressure of the hydraulic front cavity 104 drives the piston 3 to move backward, thereby driving the two friction plates 2 to loosen the rotating shaft.

[0054] In order to realize the above-mentioned embodiment two, a sealing ring 10 is further arranged at the position of the through hole 111, so that the entire hydraulic cylinder 102 can be completely sealed, and the hydraulic front cavity 104 is prevented from leaking. Embodiment Three

[0055] Embodiment Three differs from Embodiment One in that, as shown in Figures 8 to 15 The two brake oil paths 4 each include a shunt oil path 41 and a connecting oil path 42 connected thereto, and the number of connecting oil paths 42 corresponds to the number of hydraulic rear cavities 103.

[0056] The opposite end faces of the two caliper bodies 9 are each provided with an annular groove 902, and the two annular grooves 902 are connected to form a circular shunt oil path 41. Each connecting oil path 42 includes a radial oil channel 413 and a vertical oil channel 414 in communication with each other. One end of the radial oil channel 413 is connected with a plug 43, the other end of the radial oil channel 413 is in communication with the hydraulic rear cavity 103, one end of the vertical oil channel 414 is connected to the middle position of the radial oil channel 413, the other end of the vertical oil channel 414 is in communication with the shunt oil path 41, and an oil inlet and outlet 401 is arranged on any vertical oil channel.

[0057] Furthermore, the annular groove 902 is provided with a second step surface 422 on both sides of the groove opening, and the inner and outer second step surfaces 422 are provided with an inner sealing ring 13 and an outer sealing ring 14. After the two caliper bodies 9 are abutted, the two caliper bodies 9 tightly clamp the inner sealing ring 13 and the outer sealing ring 14 at the same time, thereby forming a sealed shunt oil path 41 to prevent oil leakage between the two caliper bodies 9.

[0058] The above is the preferred scheme of the present application, which shows and describes the basic principle, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principle of the present application. Various changes and improvements can be made to the present application without departing from the spirit and scope of the present application. These changes and improvements all fall within the scope of the claimed present application, and the scope of protection of the present application is defined by the appended claims and equivalents.

Claims

1. Brake for a rotating shaft, characterized in that: The utility model provides a kind of brake caliper, including annular tong seat (1), the tong slot (101) of being opened to the inside arc side is opened in the tong seat (1), the two groove sides of the tong slot (101) are annularly arranged with multiple friction disc (2) one by one opposite, and piston (3) is driven to drive two sides friction disc (2) relative movement, the hydraulic cylinder (102) suitable for piston (3) axial reciprocating motion is opened in the tong seat (1), and the hydraulic rear cavity (103) is formed between the back of piston (3) and hydraulic cylinder (102), brake oil circuit (4) is opened in the tong seat (1) with the hydraulic rear cavity (103) intercommunication, and one end of brake oil circuit (4) is opened with inlet and outlet (401), and the hydraulic cylinder (102) is also provided with release structure that piston (3) is pushed to the hydraulic rear cavity (103).

2. The brake for a rotating shaft according to claim 1, characterized in that: The tong seat (1) is fixedly connected with a limiting portion (5), and the limiting portion (5) is arranged between the piston (3) and the friction disc (2); the release structure includes a return spring (6), and the return spring (6) is sleeved on the piston (3) and abuts against the front surface of the piston (3) and the back surface of the limiting portion (5).

3. The brake for a rotating shaft according to claim 1, characterized in that: The release structure includes hydraulic oil (7) stored in a hydraulic front cavity (104), the hydraulic front cavity (104) is formed between the front surface of the piston (3) and the hydraulic cylinder (102), and the tong seat (1) is provided with a return oil circuit (8) in communication with the hydraulic front cavity (104), and one end of the return oil circuit (8) is provided with a second inlet and outlet (801).

4. The brake for a rotating shaft according to claim 1, characterized by: The tong seat (1) includes two tong bodies (9), recesses (901) are formed on the opposite end surfaces of the two tong bodies (9), the two tong bodies (9) are symmetrically connected, and the tong slot (101) is formed between the two recesses (901), and the brake oil circuit (4) is formed in each tong body (9) and communicates with a plurality of hydraulic rear cavities (103).

5. The brake for a rotating shaft according to claim 1, characterized by: The inner wall of the hydraulic cylinder (102) is provided with one or more than one sealing groove arranged at intervals corresponding to the axial movement position of the piston (3), and each sealing groove is embedded with a sealing ring (10) elastically abutting against the outer wall of the piston (3).

6. The brake for a rotating shaft according to claim 4, wherein: The brake oil circuits (4) on the two sides each include a shunt oil circuit (41) and a connecting oil circuit (42), each hydraulic rear cavity (103) on each tong seat (1) is connected to each other through the shunt oil circuit (41), the shunt oil circuits (41) on the two sides are connected to each other through the corresponding connecting oil circuits (42), and the inlet and outlet (401) is formed on one of the shunt oil circuits (41) or the connecting oil circuits (42).

7. A brake for a rotating shaft according to claim 6, characterized in that: The shunt oil circuit (41) includes a horizontal oil channel (411) and a vertical oil channel (412) intersecting and connecting, and the horizontal oil channel (411) and the vertical oil channel (412) are formed by drilling holes horizontally into the side wall of the tong seat (1); the inner ports of the horizontal oil channel (411) and the vertical oil channel (412) are connected to the hydraulic rear cavities (103), and the outer ports of the horizontal oil channel (411) and the vertical oil channel (412) are connected with plug heads (43). The outer port of one of the transverse oil channel (411) or longitudinal oil channel (412) forms the inlet and outlet oil port (401), and the connecting oil path (42) is arranged on the transverse oil channel (411) or / and longitudinal oil channel (412) closest to the inlet and outlet oil port (401).

8. The brake for a rotating shaft according to claim 4, wherein: The brake oil path (4) on both sides comprises a shunt oil path (41) and a connecting oil path (42) corresponding to the number of hydraulic back cavities (103); The opposite end faces of the two caliper bodies are provided with annular grooves, and the two annular grooves are connected to form a shunt oil path (41); each connecting oil path (42) comprises a radial oil channel (413) and a vertical oil channel (414) in communication with each other, one end of the radial oil channel (413) is in communication with the hydraulic back cavity (103), and the other end of the vertical oil channel (414) is in communication with the shunt oil path (41), and an inlet and outlet oil port (401) is arranged on any vertical oil channel.

9. The brake acting on a rotating shaft according to claim 2, characterized in that: A plurality of recess cavities (105) are arranged on the caliper seat (1) and open to the caliper groove (101), the groove side of the caliper groove (101) is tightly connected with a check ring (11), the check ring (11) and the recess cavity (105) define a hydraulic cylinder (102), the check ring (11) is provided with a through hole (111) corresponding to each hydraulic cylinder (102) and suitable for the convex column of the piston (3) to extend outward, the friction disc (2) is connected to the convex column, and the part of the check ring (11) around the through hole (111) forms a limiting portion (5).

10. The brake for a rotating shaft according to claim 1, characterized by: The hydraulic cylinder (102) is provided with a support protrusion (12) corresponding to the back of the piston (3), the back of the piston (3) is movably abutted on the support protrusion (12) through a loosening structure and is spaced apart from the cylinder bottom; the support protrusion (12) is arranged at the center position of the cylinder bottom.

Images