Hydraulic brake caliper body with double sealing rings

Abstract

The utility model relates to the technical field of brake parts, in particular to a hydraulic brake caliper body with double sealing rings, which comprises a caliper body provided with a cylinder hole. The cylinder hole comprises a first hole channel and a second hole channel; an annular step part is formed between the second hole channel and the first hole channel, and a first sealing ring attached to the step part is contained in the second hole channel. The pressure cover is used for being inserted and fixed in the second hole channel, and the first sealing ring is clamped and fixed by the pressure cover and the step part together; the gland is provided with a through insertion hole which is in butt joint with the first hole channel so as to jointly form a hole channel allowing the piston to be inserted in a sliding mode. The hole wall of the inserting hole is provided with an embedding groove extending in the circumferential direction of the inserting hole, the embedding groove is close to the inserting opening, and a second sealing ring is embedded in the embedding groove. The two sealing rings are arranged in the cylinder hole, and one of the sealing rings can be better mounted in the middle of the cylinder hole.

Description

Technical Field

[0001] The utility model relates to the technical field of brake parts, and more specifically to a double-channel sealing ring hydraulic brake caliper body. Background Art

[0002] Disc brake caliper assemblies are increasingly used in the brake systems of various types of vehicles as a driving brake system. For example, the split brake caliper assembly disclosed in the Chinese invention patent with publication number CN109578472B generally includes a caliper body, a cylinder hole is provided in the caliper body, a piston that can slide in and out of the cylinder hole is inserted at one end of the cylinder hole, and an oil inlet connected to the oil supply pipe is provided at the other end. When working, oil enters the cylinder hole from the oil inlet to push the piston out, thereby driving the brake pad connected to the piston or the brake pad to move toward the wheel to brake the wheel.

[0003] An annular sealing ring is embedded in the cylinder hole to fill the gap between the piston and the inner wall of the cylinder hole to achieve sealing and support the movement of the piston. Specifically, in order for the sealing ring to achieve stable sealing and support, an annular groove extending in the circumferential direction of the cylinder hole is provided on the hole wall of the cylinder hole, and the sealing ring is adapted to be embedded in the annular groove.

[0004] In the prior art, for example, a double-seal ring hydraulic brake caliper body disclosed in Chinese patent publication number CN202381596U has two seal rings embedded in the cylinder hole to improve the sealing effect and optimize the stability of the piston movement.

[0005] It should be noted that in order to better improve the sealing effect and optimize the stability of the piston movement, it is preferred to embed one sealing ring at the piston insertion port close to the cylinder hole, and embed the other sealing ring at the middle position close to the cylinder hole. However, due to the small diameter of the cylinder hole itself, it is often difficult to install a sealing ring that needs to be installed in the middle of the cylinder hole due to the limitation of the cylinder hole diameter. Utility Model Content

[0006] The utility model aims to overcome the deficiencies of the prior art and provides a double-seal-ring hydraulic brake caliper body in which two seal rings are arranged in a cylinder hole and one of the seal rings can be better installed in the middle of the cylinder hole.

[0007] The technical solutions of the utility model are as follows:

[0008] A double-seal ring hydraulic brake caliper body, comprising:

[0009] The caliper body is provided with a cylinder hole, and both ends of the cylinder hole are respectively provided with an insertion port and a liquid inlet;

[0010] In the direction from the liquid inlet to the insertion port, the cylinder hole includes: a first hole channel, and a second hole channel with a larger hole diameter than the first hole channel;

[0011] An annular step portion is formed between the second hole and the first hole, and a first sealing ring is accommodated in the second hole and is attached to the step portion;

[0012] It also includes a gland for inserting and fixing in the second hole, and the gland and the step portion together clamp and fix the first sealing ring;

[0013] The gland has: a through-going plug-in hole, which is connected with the first channel to form a channel for the piston to be slidably inserted;

[0014] The hole wall of the plug hole is also provided with an embedding groove extending in the circumferential direction of the plug hole, the embedding groove is close to the plug-in port, and a second sealing ring is embedded in the embedding groove.

[0015] As a further preferred solution, the stepped portion includes: an abutting surface facing the insertion port and used to abut against the first sealing ring;

[0016] The abutting surface is a plane perpendicular to the direction in which the gland is inserted.

[0017] As a further preferred solution, a threaded connection structure is provided between the outer periphery of the gland and the hole wall of the second hole, and the gland is detachably fixed in the second hole by the threaded connection structure.

[0018] As a further preferred solution, in the direction from the insertion port to the liquid inlet, the second channel includes: a connecting channel, and a receiving channel with a smaller pore size than the connecting channel;

[0019] Wherein, the inner wall of the connecting channel is provided with: a thread for threaded connection with the outer periphery of the gland;

[0020] The hole wall of the accommodating hole is not provided with threads, and the first sealing ring is adapted to be accommodated in the accommodating hole.

[0021] As a further preferred solution, the depth of the accommodating channel is less than or equal to the thickness of the first sealing ring;

[0022] The gland includes: a first part inserted into the connecting hole and screwed to the inner wall of the connecting hole;

[0023] The pressure cover clamps and fixes the first sealing ring together with the step portion through the first part.

[0024] As a further preferred solution, the depth of the accommodating channel is greater than the thickness of the first sealing ring;

[0025] The gland includes:

[0026] A first part inserted into the connecting hole and screwed to the inner wall of the connecting hole;

[0027] and a second portion disposed at an end of the first portion and extending into the accommodating channel;

[0028] The gland clamps and fixes the first sealing ring together with the step portion through the second portion.

[0029] As a further preferred solution, a first guiding surface which is arranged obliquely to guide the first sealing ring to enter the accommodating channel from the connecting channel is formed between the accommodating channel and the connecting channel.

[0030] As a further preferred solution, the end of the first part is provided with: a second guide surface which is arranged in an inclined manner and is used to guide the first part to be inserted into the connecting channel;

[0031] The second guide surface is configured to fit and adhere to the first guide surface when the first part is inserted into the connecting channel.

[0032] As a further preferred solution, the gland has a portion extending outward from the second hole, and a plurality of raised gripping portions are arranged on the outer circumference of the portion.

[0033] As a further preferred solution, the groove opening of the embedding groove is chamfered to form an inclined surface for guiding the second sealing ring to enter the embedding groove.

[0034] The main beneficial effects of the above technical solution are:

[0035] Compared with directly forming a groove for the first sealing ring to be embedded in the middle of the cylinder hole, by forming a second channel with a larger aperture for the first sealing ring to be placed, there is a larger operating space when placing the first sealing ring, and the operator can place the first sealing ring more easily. At the same time, by inserting the gland to press and clamp the first sealing ring, the installation stability of the first sealing ring can be better improved, so that the first sealing ring can better achieve the sealing effect and the stable support effect on the piston.

[0036] Further or more detailed beneficial effects will be described in detail in conjunction with specific examples in the specific implementation manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The utility model is further described below in conjunction with the accompanying drawings:

[0038] Figure 1 It is a schematic diagram of the assembly of the caliper body, piston and two sealing rings.

[0039] Figure 2 A cross-sectional view of an assembly structure of a caliper body Figure 1 .

[0040] Figure 3 A cross-sectional view of an assembly structure of a caliper body Figure 2 .

[0041] Figure 4 A cross-sectional view of another assembly structure of the caliper body Figure 1 .

[0042] Figure 5 A cross-sectional view of another assembly structure of the caliper body Figure 2 . DETAILED DESCRIPTION

[0043] The present invention is specifically described below with reference to the embodiments:

[0044] Embodiment 1:

[0045] A double-seal ring hydraulic brake caliper body, as shown in the attached Figure 1 To Attachment Figure 3 As shown, the caliper comprises a caliper body 1, which is provided with a cylinder hole 1.1 for sliding and inserting a piston 5, an insertion port 1.2 for inserting the piston 5 is formed at one end of the cylinder hole 1.1, and a liquid inlet 1.3 for oil to enter is formed at the other end.

[0046] During operation, the liquid inlet 1.3 is connected to the oil pipe, and the oil enters the cylinder hole 1.1 from the liquid inlet 1.3 to drive the piston 5 to extend from the insertion port 1.2, driving the brake pad or brake pad connected to the piston 5 to move toward the wheel to brake the wheel.

[0047] As attached Figure 1 As shown in the figure, a first sealing ring 3 and a second sealing ring 4 are installed in the cylinder bore 1.1. When a piston 5 is inserted into the cylinder bore 1.1, the piston 5 is inserted into the sealing ring, and the two sealing rings are both around the outer periphery of the piston 5 to fill the gap between the outer periphery of the piston 5 and the caliper body 1, thereby achieving sealing and supporting the piston 5.

[0048] Considering the movement trajectory of the piston 5, the second sealing ring 4 is preferably installed near the insertion port 1.2, and the first sealing ring 3 is preferably installed in the middle of the cylinder hole 1.1.

[0049] In order to better install the first sealing ring 3. Figure 2 To Attachment Figure 5 As shown in, in this embodiment:

[0050] In the direction from the liquid inlet 1.3 to the insertion port 1.2, the cylinder hole 1.1 is divided into a first channel 1.1b and a second channel 1.1a which are connected in sequence, and the aperture of the second channel 1.1a is larger than the aperture of the first channel 1.1b; an annular step portion 1.4 is formed between the second channel 1.1a and the first channel 1.1b, and the second channel 1.1a contains a first sealing ring 3 which fits the step portion 1.4. At this time, the insertion port 1.2 is the port of the second channel 1.1a away from one end of the first channel 1.1b, and the outer diameter of the first sealing ring 3 is preferably equal to or slightly smaller than the aperture of the second channel 1.1a.

[0051] It also includes a gland 2 for inserting and fixing in the second channel 1.1a, which clamps and fixes the first sealing ring 3 together with the stepped portion 1.4. The gland 2 has a through-going plug hole 2.1. When the gland 2 is inserted into the second channel 1.1a, the plug hole 2.1 is connected with the first channel 1.1b to form a channel for the piston 5 to slide and insert. In addition, the hole wall of the plug hole 2.1 is also provided with: an annular embedding groove 2.2 extending in the circumferential direction of the plug hole 2.1, the embedding groove 2.2 is close to the insertion port 1.2, and the second sealing ring 4 is embedded.

[0052] When attached Figure 2 When installing the sealing ring, the first sealing ring 3 is placed downward from the insertion port 1.2. Under the action of gravity and the external force of the operator, the first sealing ring 3 can fall directly and be easily placed in the second channel 1.1a with a larger aperture; then, without the operator inserting his hand into the second channel 1.1a to press the first sealing ring 3, the gland 2 is inserted downward from the insertion port 1.2 into the second channel 1.1a until the lower end of the gland 2 presses the first sealing ring 3 downward, and the lower end surface of the first sealing ring 3 fits or fits tightly on the step 1.4, that is, the installation and fixation of the first sealing ring 3 is completed. And the first sealing ring 3 is in a stable installation state of being adapted and clamped.

[0053] Since the embedding groove 2.2 is close to the insertion opening 1.2, the operator can easily install the second sealing ring 4, or more precisely, the outer edge of the second sealing ring 4, into the embedding groove 2.2 after the first sealing ring 3 is installed, to complete the installation of the second sealing ring 4.

[0054] After the first sealing ring 3 and the second sealing ring 4 are installed, Figure 3 as shown in .

[0055] In order to facilitate installation / disassembly of the gland 2 and ensure that the gland 2 can stably press the first sealing ring 3, in this embodiment, a threaded connection structure is provided between the outer periphery of the gland 2 and the hole wall of the second hole 1.1a, for example, an external thread is provided on the outer periphery of the gland 2, and an internal thread screwed to the external thread is provided on the hole wall of the second hole 1.1a. The gland 2 is detachably fixed in the second hole 1.1a through the threaded connection structure.

[0056] At this time, the gland 2 preferably has a portion extending outward from the second hole 1.1a, and a plurality of raised gripping portions 2.3 are provided on the outer circumference of the portion to facilitate the operator to grasp the gland 2 and apply force to drive the gland 2 to rotate.

[0057] Furthermore, the step portion 1.4 in this embodiment includes: an abutting surface facing the insertion port 1.2 and used to abut the first sealing ring 3; the abutting surface is a plane perpendicular to the insertion direction of the gland 2, so as to provide stable support for the first sealing ring 3.

[0058] To facilitate installation of the second sealing ring 4, the notch of the mounting groove 2.2 may be chamfered to form an inclined surface for guiding the second sealing ring 4 into the mounting groove 2.2. The inclined surface may be a plane or a curved surface.

[0059] Embodiment 2:

[0060] On the basis of the first embodiment, it is considered that the threaded structure may easily hinder the installation of the first sealing ring 3, so that the first sealing ring 3 cannot be smoothly moved into place.

[0061] In this embodiment, as shown in the attached Figure 4 To Attachment Figure 5 As shown in the figure, in the direction from the insertion port 1.2 to the liquid inlet 1.3, the second channel 1.1a is divided into a connecting channel 1.1a1 and a receiving channel 1.1a2 which are interconnected, and the aperture of the receiving channel 1.1a2 is smaller than the aperture of the connecting channel 1.1a1.

[0062] The inner wall of the connecting channel 1.1a1 is provided with threads for threaded connection with the outer periphery of the gland 2; the hole wall of the accommodating channel 1.1a2 is not provided with threads. The hole diameter of the accommodating channel 1.1a2 is slightly larger than or equal to the outer diameter of the first sealing ring 3, so that the first sealing ring 3 can be accommodated in the accommodating channel 1.1a2.

[0063] The depth of the accommodating channel 1.1a2 may be less than or equal to the thickness of the first sealing ring 3. In this case:

[0064] The gland 2 comprises a first portion 2a inserted into the connecting hole 1.1a1 and screwed to the inner wall of the connecting hole 1.1a1. The gland 2 clamps and fixes the first sealing ring 3 together with the step portion 1.4 through the first portion 2a.

[0065] Alternatively, the depth of the accommodating channel 1.1a2 may be greater than the thickness of the first sealing ring 3. In this case:

[0066] The gland 2 includes a first portion 2a inserted into the connection channel 1.1a1 and screwed to the inner wall of the connection channel 1.1a1; and a second portion 2b disposed at the end of the first portion 2a and extending into the accommodating channel 1.1a2; the gland 2 clamps and fixes the first sealing ring 3 together with the step portion 1.4 through the second portion 2b. Moreover, the first sealing ring 3 can be more stably contained in the accommodating channel 1.1a2.

[0067] In order to make the first sealing ring 3 enter the accommodating channel 1.1a2 more smoothly from the connecting channel 1.1a1, as shown in the attached Figure 4 As shown in FIG. 1 , a first guiding surface 1.5 which is arranged obliquely to guide the first sealing ring 3 from the connecting hole 1.1a1 into the accommodating hole 1.1a2 may be formed between the accommodating hole 1.1a2 and the connecting hole 1.1a1.

[0068] At the same time, if attached Figure 4 As shown in FIG. 1 , the end of the first portion 2a of the gland 2 may also be provided with a second guide surface 2a.1 which is arranged in an inclined manner and is used to guide the first portion 2a to be inserted into the connecting channel 1.1a1; when the first portion 2a is as shown in FIG. Figure 5 When inserted into the connecting channel 1.1a1 as shown in FIG, the second guide surface 2a.1 fits with the first guide surface 1.5 to improve the tightness of the overall assembly structure.

[0069] The above is only a preferred embodiment of the utility model, and does not limit the scope of the utility model. In addition, the terms "vertical", "horizontal", "front", "rear", etc. mentioned in the embodiments of the utility model indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the utility model. It should be further explained that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like in the description should be understood in a broad sense, for example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances. The utility model will be described in detail with reference to the drawings and in combination with the embodiments.

[0070] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A double-seal ring hydraulic brake caliper body, characterized in that: include: A caliper body (1) is provided with a cylinder hole (1.1), and both ends of the cylinder hole (1.1) respectively have an insertion port (1.2) and a liquid inlet (1.3); In the direction from the liquid inlet (1.3) to the insertion port (1.2), the cylinder hole (1.1) comprises: a first hole channel (1.1b), and a second hole channel (1.1a) having a larger hole diameter than the first hole channel (1.1b); An annular stepped portion (1.4) is formed between the second hole (1.1a) and the first hole (1.1b), and a first sealing ring (3) affixed to the stepped portion (1.4) is accommodated in the second hole (1.1a); It also includes a gland (2) for being inserted into and fixed in the second hole (1.1a), and which together with the stepped portion (1.4) clamps and fixes the first sealing ring (3); The gland (2) comprises: a through-going plug-in hole (2.1) which is connected to the first hole (1.1b) to form a hole for sliding insertion of the piston (5); The hole wall of the plug hole (2.1) is also provided with an embedding groove (2.2) extending in the circumferential direction of the plug hole (2.1), the embedding groove (2.2) being close to the plug-in port (1.2) and having a second sealing ring (4) embedded therein.

2. A double-seal ring hydraulic brake caliper body according to claim 1, characterized in that: The stepped portion (1.4) comprises: a contact surface facing the insertion opening (1.2) and used to contact the first sealing ring (3); The abutment surface is a plane perpendicular to the insertion direction of the gland (2).

3. The double-seal ring hydraulic brake caliper body according to claim 1, characterized in that: A threaded connection structure is provided between the outer periphery of the gland (2) and the hole wall of the second hole (1.1a), and the gland (2) is detachably fixed in the second hole (1.1a) via the threaded connection structure.

4. A double-seal ring hydraulic brake caliper body according to claim 3, characterized in that: In the direction from the insertion port (1.2) to the liquid inlet (1.3), the second channel (1.1a) comprises: a connecting channel (1.1a1), and a containing channel (1.1a2) having a smaller pore diameter than the connecting channel (1.1a1); Wherein, the inner wall of the connecting channel (1.1a1) is provided with: a thread that is threadedly connected to the outer periphery of the gland (2); The hole wall of the accommodating hole (1.1a2) is not provided with threads, and the first sealing ring (3) is adapted to be accommodated in the accommodating hole (1.1a2).

5. A double-seal ring hydraulic brake caliper body according to claim 4, characterized in that: The hole depth of the accommodating channel (1.1a2) is less than or equal to the thickness of the first sealing ring (3); The gland (2) comprises: a first part (2a) inserted into the connection channel (1.1a1) and screwed to the inner wall of the connection channel (1.1a1); The gland (2) clamps and fixes the first sealing ring (3) together with the step portion (1.4) through the first portion (2a).

6. A double-seal ring hydraulic brake caliper body according to claim 4, characterized in that: The hole depth of the accommodating channel (1.1a2) is greater than the thickness of the first sealing ring (3); The gland (2) comprises: A first part (2a) inserted into the connecting hole (1.1a1) and threadedly connected to the inner wall of the connecting hole (1.1a1); and a second part (2b) arranged at the end of the first part (2a) and extending into the accommodating channel (1.1a2); The gland (2) clamps and fixes the first sealing ring (3) together with the stepped portion (1.4) through the second portion (2b).

7. A double-seal ring hydraulic brake caliper body according to any one of claims 5 to 6, characterized in that: A first guide surface (1.5) is formed between the accommodating hole (1.1a2) and the connecting hole (1.1a1) and is arranged in an inclined manner to guide the first sealing ring (3) from the connecting hole (1.1a1) into the accommodating hole (1.1a2).

8. The double-seal ring hydraulic brake caliper body according to claim 7, characterized in that: The end of the first part (2a) is provided with: a second guide surface (2a.1) which is arranged in an inclined manner and is used to guide the first part (2a) to be inserted into the connecting channel (1.1a1); The second guide surface (2a.1) is configured to fit and conform to the first guide surface (1.5) when the first part (2a) is inserted into the connecting channel (1.1a1).

9. The double-seal ring hydraulic brake caliper body according to claim 1, characterized in that: The gland (2) has a portion extending outward from the second hole (1.1a), and a plurality of raised gripping portions (2.3) are provided on the outer circumference of the portion.

10. The double-seal ring hydraulic brake caliper body according to claim 1, characterized in that: The notch of the embedding groove (2.2) is chamfered to form an inclined surface for guiding the second sealing ring (4) to enter the embedding groove (2.2).

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