Brake oil cylinder for small skid loader

Abstract

The brake oil cylinder comprises an oil cylinder shell, a flange and an end cover, a piston is connected to the inner wall of the oil cylinder shell in a sliding mode, a telescopic rod is connected to the inner wall of the piston in a sliding mode, an oil cylinder oil inlet is formed in the oil cylinder shell, a guide groove is formed in the end cover, and the telescopic rod is connected to the inner wall of the piston in a sliding mode. The telescopic rod is connected to the inner wall of the guide groove in a sliding mode, a spring is installed on one side of the piston, an annular notch is formed in the side wall of the end cover, the spring is located in the annular notch, and the side wall of the telescopic rod is sleeved with the spring. During parking, the spring automatically pushes the telescopic rod to be inserted into the round hole of the wheel hub, parking braking is achieved, using is easy and convenient, braking is strong, the device is suitable for various road conditions, a non-friction braking mode is adopted, friction loss is reduced, the limiting effect is not affected by the condition, the moving danger of a vehicle is reduced, and therefore potential safety hazards are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of brake oil cylinders, in particular to a brake oil cylinder for a small skid loader. Background Art

[0002] A small skid loader is a small piece of engineering machinery. It is widely used in construction, municipal administration, gardening, agriculture and other fields. It can improve work efficiency and reduce labor intensity. When the small skid loader stops, the hydraulic system amplifies the force applied by the driver to the brake pedal, pushing the brake piston, causing the brake pads to contact the brake disc or brake drum to generate friction, thereby achieving braking. However, braking using only the extrusion friction method is insufficient for a large vehicle body like a small skid loader, especially when parking on a slope. In addition, the limiting effect will be severely damaged after long-term friction between the brake pads and the brake disc or brake drum. If the brake pads are not replaced in time, the vehicle will be in danger of moving, posing a high safety hazard. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] Therefore, the purpose of the present invention is to provide a brake cylinder for a small skid loader, which can solve the problem of insufficient braking force and potential safety hazards when the small skid loader is parked.

[0005] To achieve the above-mentioned purpose, the utility model proposes a brake cylinder for a small skid loader, comprising a cylinder housing, a flange and an end cover, wherein the inner wall of the cylinder housing is slidably connected to a piston, the inner wall of the piston is slidably connected to a telescopic rod, the cylinder housing is provided with a cylinder oil inlet, a guide groove is provided in the end cover, the telescopic rod is slidably connected to the inner wall of the guide groove, wherein a spring is installed on one side of the piston, the side wall of the end cover is provided with an annular notch, the spring is located inside the annular notch, the side wall of the telescopic rod is sleeved with a spring, one end of the spring is engaged with the inner wall of the guide groove, two oil seals are installed on the side wall of the piston, and both of the oil seals slide on the inner wall of the cylinder housing.

[0006] Compared with the prior art, the brake cylinder for a small skid loader of the utility model automatically pushes the telescopic rod into the circular hole of the wheel hub when parking, thereby realizing parking brake. The utility model is simple and convenient to use, has strong braking force, and is suitable for various road conditions. In addition, the non-friction braking method is adopted to reduce friction loss, and the limiting effect will not be affected by the situation, thereby reducing the movement risk of the vehicle and thus reducing safety hazards.

[0007] In addition, the brake cylinder for a small skid loader according to the present invention may also have the following additional technical features:

[0008] Specifically, the cylinder housing and the end cover are both equipped with air release valves, and both air release valves are provided with air vents, one of the air vents corresponds to the annular notch space, and the other air vent corresponds to the guide groove space.

[0009] Specifically, a hemispherical dust cover is installed on the inner wall of the vent, a driving rod is provided on the hemispherical dust cover, two arc-shaped scraping rods are installed on the side wall of the driving rod, the arc-shaped scraping rods are slidably connected to the side wall of the hemispherical dust cover, a sleeve is installed on the inside of the hemispherical dust cover, the driving rod is rotatably connected to the inner wall of the sleeve, and several wind drive wheels are installed on the side wall of the driving rod, and the wind drive wheels match the inner diameter of the vent.

[0010] Specifically, a protective cover is installed at one end of the air release valve, an air intake grille is provided on the protective cover, the air intake grille corresponds to the position of the air vent, a support plate is concealedly installed on the inner wall of the air vent, and the drive rod is rotatably connected to the corresponding inner wall of the support plate.

[0011] Specifically, a pressure sensor is installed in the oil cylinder housing, and the pressure sensor corresponds to the oil cavity space.

[0012] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0014] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the front cross-sectional structure of the utility model as a whole;

[0016] Figure 3 For this utility model Figure 2 A schematic diagram of the partially enlarged structure at point A in the middle;

[0017] Figure 4 It is a schematic diagram of the exploded and enlarged structure of the air release valve and the hemispherical dust cover in the utility model.

[0018] As shown in the figure:

[0019] 1. Cylinder housing; 11. Flange; 12. End cover; 121. Annular notch; 13. Piston; 14. Cylinder oil inlet; 15. Guide groove; 16. Oil seal; 2. Telescopic rod; 3. Air release valve; 31. Air vent; 32. Protective cover; 321. Air intake grille; 33. Support plate; 4. Hemispherical dust cover; 41. Drive rod; 42. Curved scraper rod; 43. Casing; 44. Wind drive wheel; 5. Pressure sensor. DETAILED DESCRIPTION

[0020] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention. On the contrary, the embodiments of the present invention include all variations, modifications, and equivalents that fall within the spirit and scope of the appended claims.

[0021] A brake cylinder for a small skid loader according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0022] like Figure 1-Figure 4 As shown, a brake cylinder for a small skid loader according to an embodiment of the present invention may include a cylinder housing 1, a flange 11 and an end cover 12. A piston 13 is slidably connected to the inner wall of the cylinder housing 1, and a telescopic rod 2 is slidably connected to the inner wall of the piston 13. A cylinder oil inlet 14 is provided on the cylinder housing 1, and a guide groove 15 is opened in the end cover 12. The telescopic rod 2 is slidably connected to the inner wall of the guide groove 15.

[0023] A spring is installed on one side of the piston 13 , and an annular notch 121 is provided on the side wall of the end cover 12 , and the spring is located inside the annular notch 121 .

[0024] It should be noted that the end cover 12 described in this embodiment limits the movement range of the piston 13 , and the spring pushes the piston 13 in the opposite direction through the end cover 12 .

[0025] A spring is sleeved on the side wall of the telescopic rod 2 , and one end of the spring is engaged with the inner wall of the guide groove 15 .

[0026] It should be noted that the guide groove 15 described in this embodiment is composed of two circular grooves with different diameters. The guide groove 15 is consistent in size with the telescopic rod 2 , and the spring pushes the telescopic rod 2 in the opposite direction through the end cover 12 .

[0027] Two oil seals 16 are installed on the side wall of the piston 13 , and both oil seals 16 slide on the inner wall of the cylinder housing 1 .

[0028] It should be noted that the cavity between the two oil seals 16 described in this embodiment is an oil cavity, and when the internal pressure of the oil cylinder increases, the piston 13 is pushed to slide toward the end cover 12 .

[0029] Specifically, holes are evenly distributed on the circumference of the running wheel hub, the cylinder housing 1 is connected to the vehicle chassis through the flange 11, and the oil pipe is connected to the cylinder oil inlet 14 through the vehicle hydraulic system. When the vehicle engine is working, the hydraulic oil pump works at the same time, and the hydraulic oil enters the cylinder oil inlet 14 and then reaches the oil chamber. The hydraulic oil pushes the piston 13 to slide toward the end cover 12, and the piston 13 squeezes the corresponding spring to shorten it. The annular protrusion on the telescopic rod 2 is inside the piston 13, so that the piston 13 can transmit the telescopic rod 2 through the annular protrusion, so that the telescopic rod 2 can slide toward the deep direction of the guide groove 15, and the two oil seals 16 will enter The hydraulic oil in the oil chamber is sealed to prevent leakage of the hydraulic oil. The telescopic rod 2 is retracted into the cylinder housing 1 and exits the circumferential hole on the wheel hub, releasing the parking brake and allowing the vehicle to operate normally. When the vehicle engine stops working and the hydraulic oil pump stops working, the piston 13 and the telescopic rod 2 are pushed away from the end cover 12 under the elastic restoring force of the two springs. The telescopic rod 2 is inserted into the circular hole in the wheel hub to achieve parking brake. It is simple and convenient to use, with strong braking force, and is suitable for various road conditions. In addition, the non-friction braking method is adopted to reduce friction loss, and the limiting effect will not be affected by this situation, thereby reducing the risk of vehicle movement and thus reducing safety hazards.

[0030] In one embodiment of the present invention, Figure 1-Figure 4 As shown, the cylinder housing 1 and the end cover 12 are both equipped with air release valves 3 , and both air release valves 3 are provided with air vents 31 , one of the air vents 31 corresponds to the annular notch 121 in space, and the other air vent 31 corresponds to the guide groove 15 in space.

[0031] It should be noted that an annular storage space is formed between the oil cylinder housing 1 and the annular notch 121 described in this embodiment, and a spring is located inside the control.

[0032] Specifically, the cylinder housing 1 and the end cover 12 both support the corresponding air release valve 3. The air release valve 3 remains fixed after being installed and connected to the cylinder housing 1 or the end cover 12. The air release valve 3 allows the external space to communicate with the annular space where the guide groove 15 and the annular notch 121 are located through the air vent 31, so that when the telescopic rod 2 and the piston 13 slide, the two spaces are replenished or exhausted with external air through the air vent 31, thereby reducing the interference effect of air pressure on oil pressure.

[0033] In one embodiment of the present invention, Figure 2-Figure 4As shown, a hemispherical dust cover 4 is installed on the inner wall of the vent 31, a driving rod 41 is provided on the hemispherical dust cover 4, and two arc-shaped scraping rods 42 are installed on the side wall of the driving rod 41. The arc-shaped scraping rods 42 are slidably connected to the side wall of the hemispherical dust cover 4, a sleeve 43 is installed on the inner side of the hemispherical dust cover 4, the driving rod 41 is rotatably connected to the inner wall of the sleeve 43, and a plurality of wind drive wheels 44 are installed on the side wall of the driving rod 41, and the wind drive wheel 44 matches the inner diameter of the vent 31.

[0034] It should be noted that the arc-shaped scraper rod 42 described in this embodiment is consistent with the size and position of the hemispherical dust cover 4, and the arc-shaped scraper rod 42 is completely fitted with the side wall of the hemispherical dust cover 4 to ensure the cleaning effect.

[0035] Specifically, the hemispherical dust cover 4 blocks dust in the external air to prevent dust from entering the brake cylinder. The hemispherical dust cover 4 is connected to the drive rod 41 through the sleeve 43. The drive rod 41 supports the wind drive wheel 44 and the two arc-shaped scraper rods 42. When airflow is generated inside the air vent 31, the airflow pushes the wind drive wheel 44 to drive the drive rod 41 to rotate, so that the drive rod 41 can drive the arc-shaped scraper rod 42 to rotate. The arc-shaped scraper rod 42 scrapes and cleans the hemispherical dust cover 4 to avoid blockage of the hemispherical dust cover 4.

[0036] In one embodiment of the present invention, Figure 1-Figure 3 As shown, a protective cover 32 is installed at one end of the air release valve 3, and an air intake grille 321 is provided on the protective cover 32. The air intake grille 321 corresponds to the position of the air vent 31. A support plate 33 is secretly installed on the inner wall of the air vent 31, and the driving rod 41 is rotatably connected to the inner wall of the corresponding support plate 33.

[0037] It should be noted that the air intake grille 321 described in this embodiment enables the vent hole 31 to communicate with the external space normally.

[0038] Specifically, the protective cover 32 and the air intake grille 321 block external objects to prevent interference or damage to components such as the hemispherical dust cover 4, and the support plate 33 supports the driving rod 41 to ensure the stability of the wind drive wheel 44 and the arc scraper rod 42 during use.

[0039] In one embodiment of the present invention, Figure 2 As shown, a pressure sensor 5 is installed in the cylinder housing 1, and the pressure sensor 5 corresponds to the oil chamber space.

[0040] It should be noted that the pressure sensor 5 described in this embodiment is powered by the connection line between the brake cylinder and the small skid steer loader, and the pressure sensor 5 is not in contact with the piston 13.

[0041] Specifically, when the hydraulic oil enters the oil chamber through the oil cylinder inlet 14, the hydraulic oil pushes the piston 13 and the telescopic rod 2, and the pressure sensor 5 monitors and senses the pressure inside the oil chamber. When the brake cylinder leaks or is not sealed tightly, the pressure monitored by the pressure sensor 5 will decrease, affecting the normal control of the telescopic rod 2. The pressure sensor 5 transmits the leakage information to the vehicle through wireless signal transmission, which facilitates timely inspection and maintenance by the staff.

[0042] In summary, the brake cylinder for a small skid loader in the embodiment of the utility model works according to the following principles: when the vehicle engine is working, the hydraulic oil pump works at the same time, the hydraulic oil enters the oil inlet 14 of the cylinder, and then reaches the oil chamber, and the hydraulic oil pushes the piston 13 to slide toward the end cover 12, and the piston 13 drives the telescopic rod 2 to slide toward the deep direction of the guide groove 15, and the telescopic rod 2 retracts into the inside of the cylinder housing 1 and exits the circumferential hole on the wheel hub to release the parking brake. When parking, the hydraulic oil pump stops working and pushes the piston 13 and the telescopic rod 2 to move away from the end cover 12 under the elastic restoring force of the two springs. The telescopic rod 2 is inserted into the circular hole of the wheel hub to realize the parking brake. It adopts a hydraulic-mechanical joint braking form, and a compression spring is used as a brake component unit. It has the characteristics of compact structure, stable performance, and long service life. It has the advantages of quick response and cleanliness without pollution. It realizes synchronous braking, can effectively ensure the braking state when stopping, and is safe and reliable.

[0043] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this utility model, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0044] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0045] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and deform the above embodiments within the scope of the present invention.

Claims

1. A brake cylinder for a small skid loader, comprising a cylinder housing (1), a flange (11) and an end cover (12), characterized in that: The inner wall of the oil cylinder housing (1) is slidably connected to a piston (13), and the inner wall of the piston (13) is slidably connected to a telescopic rod (2). The oil cylinder housing (1) is provided with an oil cylinder inlet (14), and a guide groove (15) is provided in the end cover (12), and the telescopic rod (2) is slidably connected to the inner wall of the guide groove (15); Wherein, a spring is installed on one side of the piston (13), and an annular notch (121) is provided on the side wall of the end cover (12), and the spring is located inside the annular notch (121); The side wall of the telescopic rod (2) is sleeved with a spring, one end of which is engaged with the inner wall of the guide groove (15); Two oil seals (16) are installed on the side wall of the piston (13), and both of the oil seals (16) slide on the inner wall of the cylinder housing (1).

2. A brake cylinder for a small skid loader according to claim 1, characterized in that: The oil cylinder housing (1) and the end cover (12) are both equipped with air release valves (3), and both air release valves (3) are provided with air vents (31), one of the air vents (31) corresponds to the space of the annular notch (121), and the other air vent (31) corresponds to the space of the guide groove (15).

3. A brake cylinder for a small skid loader according to claim 2, characterized in that: A hemispherical dust cover (4) is installed on the inner wall of the vent hole (31), a driving rod (41) is provided on the hemispherical dust cover (4), two arc-shaped scraping rods (42) are installed on the side wall of the driving rod (41), the arc-shaped scraping rods (42) are slidably connected to the side wall of the hemispherical dust cover (4), a sleeve (43) is installed on the inner side of the hemispherical dust cover (4), the driving rod (41) is rotatably connected to the inner wall of the sleeve (43), and a plurality of wind drive wheels (44) are installed on the side wall of the driving rod (41), and the wind drive wheels (44) match the inner diameter of the vent hole (31).

4. A brake cylinder for a small skid steer loader according to claim 3, characterized in that: A protective cover (32) is installed at one end of the air release valve (3), and an air intake grille (321) is provided on the protective cover (32). The air intake grille (321) corresponds to the position of the air vent (31). A support plate (33) is concealedly installed on the inner wall of the air vent (31), and the driving rod (41) is rotatably connected to the inner wall of the corresponding support plate (33).

5. The brake cylinder for a small skid steer loader according to claim 1, characterized in that: A pressure sensor (5) is installed in the oil cylinder housing (1), and the pressure sensor (5) corresponds to the oil chamber space.

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