Hydraulic brake adjusting mechanism of forklift

Abstract

The utility model discloses a forklift hydraulic brake adjusting mechanism which comprises a brake oil cylinder, a piston capable of moving up and down under stress is contained in the brake oil cylinder, an induction piece is embedded in the bottom of the piston, and a Hall sensor located on the same vertical axis with the induction piece is installed on the bottom wall of the brake oil cylinder in a threaded mode. According to the utility model, the detection part for detecting the residual amount of the internal brake fluid is designed in the brake oil cylinder, when the internal brake fluid is in a normal range, the distance that the piston rod drives the piston to move is short, and at the moment, a signal received by the Hall sensor is not in a set range; at the moment, more piston rods need to be pressed downwards, the distance between the induction piece at the bottom of the piston and the Hall sensor is narrowed, when the distance reaches the set range, a driver can be reminded that the brake fluid is insufficient and needs oil supplementation or maintenance operation, at the moment, the remaining brake fluid can still guarantee normal braking of the time, and therefore operation is safer.

Description

Technical Field

[0001] The utility model belongs to the technical field of forklift braking, and specifically relates to a hydraulic braking adjustment mechanism for forklifts. Background Art

[0002] The hydraulic power braking system of forklifts can provide safe and reliable braking, which is used for forklifts and other equipment in the material oil transportation industry. At present, the adjustment device of forklift hydraulic braking is to drive the push rod to push the piston through the brake pedal, and use the piston to move in the master cylinder, so as to drive the brake fluid into the wheel cylinder through the oil pipe, and rely on the hydraulic pressure to drive the brake drum to move, thereby completing the braking.

[0003] In the related art, reference can be made to the Chinese utility model patent with the authorization announcement number CN218118418U, which specifically discloses an adjustment mechanism for forklift hydraulic braking, including a brake cylinder and a pedal connecting piece. By rotating the limit bolt in the limit component, the limit on the C-shaped frame is lost, so that the staff can drive the second connecting rod to move through an external force, so that the overall length of the first connecting rod and the second connecting rod becomes longer, and then the initial position of the piston inside the brake cylinder can be further lowered, so that the depth of the piston driven by the brake pedal compared with the original movement position increases, which is convenient for better pushing the brake fluid.

[0004] The above method realizes the braking operation when the brake fluid is insufficient by adjusting the length of the connecting rod. However, in actual use, braking is a continuous process. When it is found that the brake fluid is insufficient, the braking performance of the forklift has deteriorated at this time, and the overall desired braking effect cannot be achieved, so the overall safety cannot be guaranteed.

[0005] In view of this, a hydraulic braking adjustment mechanism for forklifts is proposed. Content of the Utility Model

[0006] The purpose of the utility model is to provide a hydraulic braking adjustment mechanism for forklifts in order to solve the above-mentioned problems.

[0007] The technical scheme adopted by the utility model is as follows: A hydraulic braking adjustment mechanism for forklifts includes:

[0008] A brake cylinder, inside which there is a piston that can move up and down under force. An induction part is embedded at the bottom of the piston, and a Hall sensor on the same vertical axis as the induction part is installed on the bottom wall of the brake cylinder by threading, which is used to detect the descending distance of the piston;

[0009] A piston rod, the bottom of which is connected to the piston, and the other end of the piston rod extends outside the brake cylinder and is connected with a U-shaped frame, and a brake pressure rod is hinged inside the U-shaped frame.

[0010] In a preferred embodiment, the brake lever is inclined upward as a whole, a pedal is arranged on the top end surface of the brake lever, and anti-slip lines are provided on the upper end surface of the pedal.

[0011] In a preferred embodiment, it further includes a guiding platform which is installed on the upper end surface of the brake oil cylinder. A through hole communicating with the brake oil cylinder and allowing the piston rod to pass through is provided at the center of the guiding platform, and a connecting ear hinged to the brake lever is installed at one end of the guiding platform.

[0012] In a preferred embodiment, a spring sleeved on the piston rod is installed at the connection between the U-shaped frame and the guiding platform.

[0013] In a preferred embodiment, an oil filling port and an oil outlet connected to the braking structure are respectively arranged on the upper and lower sides of the brake oil cylinder.

[0014] In a preferred embodiment, the outer end of the Hall sensor has an external thread, a threaded hole corresponding to the external thread of the Hall sensor is provided on the bottom wall of the brake oil cylinder, and a sealing ring is also arranged in an interference fit at the connection between the Hall sensor and the brake oil cylinder.

[0015] To sum up, due to the adoption of the above technical solutions, the beneficial effects of the present utility model are as follows: A detection part for detecting the remaining amount of the internal brake fluid is designed in the brake oil cylinder. When the internal brake fluid is within the normal range, the distance that the piston rod drives the piston to move is short, and the distance between the sensing member and the Hall sensor is far. At this time, the signal received by the Hall sensor is not within the set range. When the remaining amount of the internal brake fluid is less to the position where oil needs to be replenished, more piston rods need to be pressed downward at this time. At this time, the distance between the sensing member at the bottom of the piston and the Hall sensor becomes narrower. When it reaches the set range, the driver can be reminded that the brake fluid is insufficient and needs to be replenished or maintained. At this time, the remaining brake fluid can still ensure normal braking for this time, so the operation is safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic plan view of the whole of the present utility model;

[0017] Figure 2 It is a schematic cross-sectional plan view of the whole of the present utility model.

[0018] Reference numerals in the figures: 1 - pedal, 2 - U-shaped frame, 3 - brake lever, 4 - connecting ear, 5 - piston rod, 6 - spring, 7 - guiding platform, 8 - oil filling port, 9 - brake oil cylinder, 10 - oil outlet, 11 - Hall sensor, 12 - sealing ring, 13 - sensing member, 14 - piston. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0020] Referring to Figure 1-2 , a hydraulic brake adjustment mechanism for a forklift, comprising: a brake cylinder 9, inside which a piston 14 that can move up and down under force is accommodated. An induction member 13 is embedded at the bottom of the piston 14. A Hall sensor 11 that is in the same vertical axis as the induction member 13 is threadedly installed on the bottom wall of the brake cylinder 9 for detecting the descending distance of the piston 14. A piston rod 5, the bottom of which is connected to the piston 14. A detection part for detecting the remaining amount of the internal brake fluid is designed in the brake cylinder 9. When the internal brake fluid is within the normal range, the distance that the piston rod 5 drives the piston 14 to move is shorter, and the distance between the induction member 13 and the Hall sensor 11 is farther. At this time, the signal received by the Hall sensor 11 is not yet within the set range. When the remaining amount of the internal brake fluid is less to the position where refueling is required, at this time, it is necessary to press down the piston rod 5 more. At this time, the distance between the induction member 13 at the bottom of the piston and the Hall sensor 11 becomes narrower. When it reaches the set range, the driver can be reminded that the brake fluid is insufficient and refueling or maintenance operations are required. At this time, the remaining brake fluid can still ensure normal braking for this time, so the operation is safer.

[0021] Among them, the induction member 13 is a circular magnet. The Hall sensor 11 is electrically connected to the main control end (not shown in the figure) of the forklift itself. When the Hall sensor 11 receives the signal of the induction member 13, the signal can be directly transmitted to the main control end to remind the staff that refueling operations are required. Since the Hall sensor 11 and the induction member 13 can sense the signal within a certain range, the amount of brake fluid between the two is the remaining amount that can still achieve braking.

[0022] Furthermore, the other end of the piston rod 5 extends outside the brake cylinder 9 and is connected to a U-shaped frame 2. A brake pressure lever 3 is hinged inside the U-shaped frame 2. A pedal 1 is arranged on the top end surface of the brake pressure lever 3. The upper end surface of the pedal 1 has anti-slip patterns. During braking, when the pedal 1 is stepped on, the pedal 1 drives the brake pressure lever 3 and the piston rod 5 to descend. At this time, the piston 14 descends, and the internal brake fluid can be pumped out, and the corresponding subsequent braking operation can be completed.

[0023] Furthermore, the brake pressure lever 3 is integrally inclined upward. Since the brake pressure lever 3 is integrally inclined upward, the distance that can be stepped down is longer than the traditional horizontal placement distance, thus ensuring the overall braking effect.

[0024] Further, it further includes a guiding platform 7, which is installed on the upper end surface of the brake oil cylinder 9. A through hole that is connected to the brake oil cylinder 9 and allows the piston rod 5 to pass through is provided at the center of the guiding platform 7. A connecting ear 4 that is hinged to the brake pressure lever 3 is installed at one end of the guiding platform 7. The guiding platform 7 provided can play an auxiliary positioning role for the piston rod 5 and ensure the stability of the piston rod 5 during up and down movement.

[0025] Further, a spring 6 sleeved on the piston rod 5 is installed at the connection between the U-shaped frame 2 and the guiding platform 7. The spring 6 provided can reduce the pressure exerted by the driver when stepping on it, avoid excessive pressure on the oil cylinder part, and thus ensure the overall service life.

[0026] Further, an oil replenishing port 8 and an oil outlet 10 connected to the braking structure are respectively provided on the upper and lower sides of the brake oil cylinder 9. A one-way valve that enters from the outside to the inside is built in the oil replenishing port 8.

[0027] Further, the outer end of the Hall sensor 11 has an external thread. A threaded hole corresponding to the external thread of the Hall sensor 11 is provided on the bottom wall of the brake oil cylinder 9. An O-ring 12 is also press-fitted at the connection between the Hall sensor 11 and the brake oil cylinder 9. The O-ring 12 designed additionally can ensure the sealing performance at the connection between the Hall sensor 11 and the brake oil cylinder 9 to reduce the phenomenon of oil leakage.

[0028] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A forklift hydraulic brake adjustment mechanism, characterized in that: include: A brake oil cylinder, which contains a piston that can move up and down under force, a sensing element is embedded in the bottom of the piston, and a Hall sensor that is on the same vertical axis as the sensing element is threadedly mounted on the bottom wall of the brake oil cylinder to detect the descending distance of the piston; The bottom of the piston rod is connected to the piston, and the other end of the piston rod extends outside the brake oil cylinder and is connected to a U-shaped frame, in which a brake pressure rod is hinged.

2. A forklift hydraulic brake adjustment mechanism according to claim 1, characterized in that: The brake lever is arranged to be tilted upward as a whole, and a pedal is arranged on the top end surface of the brake lever, and the upper end surface of the pedal has anti-skid patterns.

3. A forklift hydraulic brake adjustment mechanism according to claim 1, characterized in that: It also includes a guide platform, which is installed on the upper end surface of the brake cylinder. A through hole connected to the brake cylinder and allowing the piston rod to pass through is opened in the center of the guide platform. A connecting ear hinged to the brake pressure rod is installed at one end of the guide platform.

4. A forklift hydraulic brake adjustment mechanism as claimed in claim 3, characterized in that: A spring sleeved on the piston rod is installed at the connection between the U-shaped frame and the guide platform.

5. A forklift hydraulic brake adjustment mechanism according to claim 1, characterized in that: The upper and lower sides of the brake oil cylinder are respectively provided with an oil replenishing port and an oil outlet connected to the brake structure.

6. A forklift hydraulic brake adjustment mechanism as claimed in claim 1, characterized in that: The outer end of the Hall sensor has an external thread, the bottom wall of the brake oil cylinder is provided with a threaded hole corresponding to the external thread of the Hall sensor, and a sealing ring is provided at the connection between the Hall sensor and the brake oil cylinder.

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