Hydraulic fixed forceps piston press fitting mechanism

Abstract

The utility model discloses a kind of hydraulic fixed forceps piston press-fit mechanism, including a press-fit platform, two groups of first lifting air cylinder are provided on press-fit platform, the free end of two groups of first lifting air cylinder is provided with the positioning die for fixing fixed forceps;A vertical conveying part is set to the top of positioning die directly above.This hydraulic fixed forceps piston press-fit mechanism is set to automatic filling mechanism, and piston is automatically pushed to press-fit assembly by push cylinder, then piston is driven into press-fit position by lifting air cylinder, finally, both sides piston is synchronously loaded into forceps by rotary cylinder driven disc, so as to improve press-fit efficiency, while, greatly reduce the participation of artificial, realize the purpose of automatic press-fit, and effectively control assembly precision by automatic structure.

Description

Technical Field

[0001] This utility model relates to the field of caliper assembly technology, specifically a hydraulic fixing caliper piston pressing mechanism. Background Technology

[0002] Disc brakes are a core component of modern automotive braking systems, and their braking function is achieved through brake calipers. Specifically, a piston is located inside the brake caliper. Driven by hydraulic pressure, the piston moves axially, squeezing the brake pads on both sides and clamping them against the brake disc that rotates with the wheel. Through friction, the vehicle's kinetic energy is converted into heat energy, achieving deceleration or braking. The piston is typically press-fitted into the piston bore of the caliper body using an interference fit.

[0003] In the piston assembly process, the traditional method typically employs a step-by-step press-fitting approach. This involves first pressing all pistons on one side of the caliper, then rotating the entire workpiece 180°, and continuing to press-fit the pistons on the other side. This process has the following prominent problems: 1. Low assembly efficiency: Since the pistons on both sides need to be pressed in two separate times, the process involves operations such as flipping, repositioning and clamping the workpiece. The whole process is complicated and time-consuming, which is not conducive to improving the cycle time of automated production.

[0004] 2. Difficulty in ensuring assembly accuracy: After the workpiece is flipped, the positioning reference of the caliper changes, making it difficult to ensure that the axes of the piston holes on both sides remain aligned during the press-fitting process. This alignment deviation can easily cause the piston to tilt when pressed in, which in turn can cause local compression, twisting, or trimming of the sealing ring, affecting its sealing performance and service life.

[0005] Therefore, to address the problems of low efficiency and insufficient precision in existing technologies, there is an urgent need for a specialized device capable of synchronous, automatic, and high-precision pressing with both pistons on both sides. In view of this, our company has developed this bidirectional automatic pressing mechanism. Utility Model Content

[0006] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a hydraulic fixing clamp piston pressing mechanism, which solves the problems of low efficiency and poor assembly accuracy of existing piston pressing mechanisms.

[0007] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a hydraulic fixing clamp piston pressing mechanism, comprising a pressing table, on which two sets of liftable first lifting cylinders are provided, and the free ends of the two sets of first lifting cylinders are provided with positioning molds for fixing the clamp. A vertical conveying unit is positioned directly above the positioning mold; A liftable pressing assembly is located inside the vertical conveying section. The pressing assembly includes a base with a rotatable drive disc concentrically mounted on the base. The drive disc is driven by a rotary cylinder located on the back of the base.

[0008] An arc-shaped groove is provided on the drive disc, and a presser for pressing the piston is slidably installed in the arc-shaped groove.

[0009] As a further preferred embodiment, the presser includes a connecting part, a sliding part, and a pressing part, wherein the connecting part is slidably disposed in an arc-shaped groove, a straight groove is provided on the base, and the sliding part is slidably disposed in the straight groove.

[0010] As a further preferred embodiment, the front of the press-fitting part is provided with a bayonet for fixing the piston, and a vacuum adsorption port is provided in the bayonet. The vacuum adsorption port is connected to an external micro vacuum generator through a conduit.

[0011] As a further preferred embodiment, the top of the press-fitting section is provided with a purge pipe, which is connected to an external micro-compression pump.

[0012] A hydraulic fixing clamp piston pressing mechanism further includes a pair of filling tubes that are connected to a vertical conveying section. The pressing assembly is driven by an external second lifting cylinder. The inlet of the filling tube is provided with a pushing cylinder for pushing the piston from the filling tube into the presser.

[0013] As a further preferred embodiment, the base includes a lifting platform that fits against the inner wall of the vertical conveying section and a connecting part for accommodating the presser, wherein the drive disc is located below the connecting part.

[0014] (III) Beneficial Effects This utility model provides a hydraulic fixing clamp piston pressing mechanism. It has the following beneficial effects: 1. This utility model integrates the vertical conveying unit and the filling pipe to construct a continuous automated feeding and pressing system. In particular, the pressing assembly integrates two independently adjustable pressing devices along the arc-shaped groove of the drive disc, enabling one-time positioning and bidirectional synchronous pressing of the piston holes on both sides of the hydraulic clamp. This completely changes the inefficient traditional process that requires two pressing operations and manual workpiece flipping, eliminating the time spent on intermediate flipping, repeated positioning, and clamping. This significantly shortens the assembly cycle time for a single product, resulting in a qualitative improvement in production efficiency. Simultaneously, the streamlined process effectively controls assembly errors, thereby improving assembly accuracy. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2This is an enlarged view of a partial structure of the present invention; Figure 3 This is a partial structural diagram of the present invention; Figure 4 for Figure 3 The front view; Figure 5 This is a partial schematic diagram of the press-fit assembly of this utility model; Figure 6 This is a top view of the press-fit assembly structure of this utility model; Figure 7 for Figure 6 A schematic diagram of the AA structure; Figure 8 This is a bottom view of the press-fit assembly structure of this utility model.

[0016] In the diagram: 1. Pressing table; 2. First lifting cylinder; 3. Positioning mold; 4. Vertical conveying part; 5. Base; 51. Lifting platform; 52. Connecting part; 6. Drive plate; 7. Rotary cylinder; 8. Arc-shaped slide; 9. Pressing device; 91. Connecting part; 92. Sliding part; 93. Pressing part; 10. Straight groove; 11. Bayonet; 12. Vacuum adsorption port; 13. Miniature vacuum generator; 14. Purge pipe; 15. Miniature compression pump; 16. Filling pipe; 17. Pushing cylinder; 18. Second lifting cylinder. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] like Figure 1 As shown, this utility model provides a technical solution: a hydraulic clamping piston pressing mechanism, including a pressing table 1, on which two sets of lifting cylinders 2 are provided. The free ends of the two sets of lifting cylinders 2 are provided with positioning molds 3 for fixing clamps. A mold groove is opened in the middle of the positioning mold 3, and the clamp is inserted into the mold groove. It should be noted that finger holes should be provided at the top of the mold groove to facilitate the removal and placement of the clamp.

[0019] like Figure 1 As shown, a vertical conveying unit 4 is positioned directly above the positioning mold 3.

[0020] like Figure 2-4As shown, a liftable pressing assembly is located inside the vertical conveying section 4. The pressing assembly includes a base 5, on which a rotatable drive disk 6 is concentrically mounted. The drive disk 6 is driven by a rotary cylinder 7 located on the back of the base 5 (which can be an Airtac HRQ40-90° cylinder with a diameter of 40mm and a swing angle of 0-180 degrees, outputting a torque of 3.92 N·m (@0.5MPa) and allowing a load torque of 4.9 N·m, which can meet the pressing requirements of the piston). The outer diameter of the base 5 is equal to the inner diameter of the vertical conveying section 4, so that the base 5 always maintains a vertical posture when moving up and down within the vertical conveying section 4, thereby ensuring the assembly accuracy of the piston.

[0021] It should be noted that, in addition to using rotary cylinder 7 as the drive source, we can also choose other drive methods, such as servo motors, linear cylinders combined with rack and pinion, gears and other structures as the drive source.

[0022] like Figure 1-2 As shown, it also includes a pair of filling tubes 16, which are integrally formed with the vertical conveying section 4 and are interconnected. The pressing assembly is driven by an external second lifting cylinder 18. The inlet of the filling tube 16 is provided with a push cylinder 17 (which can be an Airtac SDA series) for pushing the piston from the filling tube 16 into the presser 9. When the base 5 is at the top of the vertical conveying section 4, the presser 9 is in the filling position. At this time, the presser 9 can abut against the outlet of the filling tube 16, and the push cylinder 17 pushes the piston directly from the filling tube 16 into the presser 9.

[0023] like Figure 3-4 As shown, the base 5 includes a lifting platform 51 that fits against the inner wall of the vertical conveying section 4 and a connecting section 52 for accommodating the presser 9. The drive disk 6 is located below the connecting section 52. The lifting platform 51 is non-circular in shape, so as to ensure that the lifting platform 51 remains stationary in the horizontal direction.

[0024] like Figure 5-8 As shown, the drive disc 6 has an arc-shaped groove 8, in which a presser 9 for pressing the piston is slidably installed. The presser 9 includes a connecting part 91, a sliding part 92, and a pressing part 93. The connecting part 91 is slidably disposed in the arc-shaped groove 8. The base 5 has a straight groove 10, in which the sliding part 92 is slidably disposed. When the drive disc 6 rotates, the presser 9 will slide along the arc-shaped groove 8. The sliding direction of the presser 9 is along the straight groove 10. That is, the rotation of the drive disc 6 causes the presser 9 to extend in a straight direction and engage the piston in the piston assembly groove of the caliper.

[0025] like Figure 7As shown, the front of the press-fitting part 93 is provided with a bayonet 11 for fixing the piston. A vacuum suction port 12 is provided inside the bayonet 11. The vacuum suction port 12 is connected to an external micro vacuum generator 13 (which can be an Airtac VPC series, with a maximum vacuum degree of 85 kPa) through a conduit. The piston can be inserted into the bayonet 11 during loading. The depth of the bayonet 11 is generally 20-25 mm, and the vacuum suction port 12 is located inside the bayonet 11.

[0026] like Figure 7 As shown, a purge pipe 14 is provided on the top of the press-fit section 93. This purge pipe 14 is connected to an external miniature compressor pump 15 (an EPCOS product, pressure 0.3 bar, size 5). 5 (3cm) Connect. Before assembly, turn on the micro compression pump 15 and blow the piston assembly groove on the caliper through the blow pipe 14 to avoid dust adhering in the groove and affecting the assembly accuracy.

[0027] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0028] In use, first place the caliper (labeled a in the figure) into the fixed mold (opening upwards) to fix the caliper in position. Then, open the first lifting cylinder 2 to raise the caliper. During the raising process, the vertical conveying part 4 enters the caliper, so that the caliper enters the assembly position in advance and waits for pressing.

[0029] Then, the piston to be pressed (labeled b in the figure) is fed into the filling tube 16 from both sides. The piston is driven to move in the filling tube 16 by the push cylinder 17 until the piston enters the vertical conveying part 4 and finally enters the bayonet 11 of the pressing part 93. Then, the vacuum suction port 12 is generated by the micro vacuum generator 13 to generate negative pressure and hold the piston in place, thus completing the filling operation.

[0030] Start the second lifting cylinder 18 to drive the entire pressing assembly to descend in the vertical conveying section 4 until it stops at the pressing position. Then start the rotary cylinder 7 to drive the drive plate 6 to rotate. During the rotation, the drive plate 6 can drive the pressing devices 9 on both sides to extend outward through the arc-shaped slide groove 8, thereby locking the piston into the piston grooves on both sides of the caliper to complete the pressing. Finally, the vacuum suction port 12 is depressurized by the micro vacuum generator 13, and the piston is released.

[0031] In summary, this hydraulic clamp piston pressing mechanism, by integrating the vertical conveying unit and the filling pipe, constructs a continuous automated feeding and pressing system. In particular, the pressing assembly integrates two independently adjustable pressing devices along the arc-shaped groove of the drive disc, enabling one-time positioning and bidirectional synchronous pressing of the piston holes on both sides of the hydraulic clamp. This completely changes the inefficient traditional process that requires two pressing operations and manual workpiece flipping, eliminating the time spent on intermediate flipping, repeated positioning, and clamping. This significantly shortens the assembly cycle time for a single product, resulting in a qualitative improvement in production efficiency. Simultaneously, the streamlined process effectively controls assembly errors, thereby improving assembly accuracy.

[0032] It should be noted that all electrical components mentioned in this article are electrically connected to an external main controller and 220V or 380V AC mains power. The main controller can be a conventional, known device such as a computer, and its control principles, internal structure, and control switching methods are all conventional methods of existing technology. These are directly cited here without further elaboration. In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydraulic fixing clamp piston pressing mechanism, characterized in that: It includes a pressing table, on which two sets of liftable first lifting cylinders are provided, and the free ends of the two sets of first lifting cylinders are provided with positioning molds for fixing clamps. A vertical conveying unit is positioned directly above the positioning mold; A liftable pressing assembly is located inside the vertical conveying section. The pressing assembly includes a base, on which a rotatable drive disk is concentrically mounted. The drive disk is driven by a rotary cylinder located on the back of the base. An arc-shaped groove is provided on the drive disc, and a presser for pressing the piston is slidably installed in the arc-shaped groove.

2. The hydraulic fixing clamp piston pressing mechanism according to claim 1, characterized in that: The presser includes a connecting part, a sliding part, and a pressing part. The connecting part is slidably disposed in an arc-shaped groove, and a straight groove is provided on the base. The sliding part is slidably disposed in the straight groove.

3. The hydraulic fixing clamp piston pressing mechanism according to claim 2, characterized in that: The front of the press-fitting part has a bayonet for fixing the piston. A vacuum adsorption port is provided in the bayonet, and the vacuum adsorption port is connected to an external miniature vacuum generator through a conduit.

4. The hydraulic fixing clamp piston pressing mechanism according to claim 2, characterized in that: The top of the pressing section is equipped with a purge pipe, which is connected to an external miniature compressor pump.

5. The hydraulic fixing clamp piston pressing mechanism according to claim 1, characterized in that: It also includes a pair of filling tubes that are connected to the vertical conveying section. The pressing assembly is driven by an external second lifting cylinder, wherein a push cylinder for pushing the piston from the filling tube into the presser is provided at the inlet of the filling tube.

6. The hydraulic fixing clamp piston pressing mechanism according to claim 5, characterized in that: The base includes a lifting platform that fits against the inner wall of the vertical conveying section and a connecting part for accommodating the presser, wherein the drive disc is located below the connecting part.

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