CN110701222A - Ratchet wheel assembly of ratchet wheel type automatic compensation device of industrial brake - Google Patents

Abstract

The invention relates to a ratchet wheel component of a ratchet wheel type automatic compensation device of an industrial brake, which consists of a ratchet wheel, a brake pull rod, a protective tube cover, a protective tube, a set screw, a sealing ring, a square pin and a ratchet wheel cover. The main structural characteristics and the beneficial effects are as follows: after the ratchet wheel assembly is assembled, on one hand, the anti-vibration problem of the automatic compensation device can be well solved through mutual constraint of assembly parts, and the over-compensation problem is avoided; on the other hand, a ratchet cavity is formed in the ratchet after the ratchet, the ratchet cover and the brake pull rod are assembled; the protection tube cavity is formed in the protection tube after the protection tube cover, the protection tube, the brake pull rod and the ratchet wheel are assembled, lubricating grease is added into the cavity, the ratchet wheel is provided with a lubricating hole and a lubricating groove, the compensation thread and the ratchet wheel can be well protected and lubricated in the action process of the ratchet wheel assembly, and the problems of blocking and rust of the ratchet wheel type automatic compensation device of the industrial brake are solved. The improved structure is adopted to enhance the capability of the ratchet wheel type automatic compensation device to adapt to various environmental conditions, and the effect of long-term stable use is achieved.

Description

A ratchet assembly of a ratchet-type automatic compensation device for an industrial brake

technical field

The invention relates to a ratchet-type automatic compensation device for industrial brakes, in particular to a ratchet-wheel assembly for the ratchet-type automatic compensation device for industrial brakes.

Background technique

Industrial brakes are widely used in various lifting, belt transportation, port loading and unloading, metallurgy and other mechanical equipment, and are used for stopping braking and maintaining braking status of various mechanical transmissions. Since the brake pads are consumables, the brake pads may be worn during use, and if they are worn to a certain extent, the braking function of the brake will fail. To solve this problem, one relies on manual maintenance and frequent adjustment of the brake lever of the brake; the other is the use of an automatic compensation device that compensates for the wear of the brake pads. Manual maintenance can no longer meet the requirements of high efficiency, reliability and automation in modern industrial production, and the existing one-way bearing compensation device has problems such as "overcompensation" or "no compensation", and requires professionals to make fine adjustments, which cannot be popularized. Used in industrial brakes. In the utility model patents "An Automatic Compensation Device for Industrial Drum Brakes" (Application No.: 201320388304.0) and "An Automatic Compensation Device and a Brake Using the Device" (Application No.: 200420068957.1), the use of ratcheting method is disclosed. Automatic compensation device, which consists of ratchet assembly, lever assembly, lever, brake frame, etc.; ratchet assembly includes ratchet wheel, square pin, brake lever, lock nut, etc., lever assembly includes spring, pawl or paddle , supports or sleeves, etc. There are two ways to install the ratchet: one is that the ratchet and the square pin form a rotating pair through the shaft shoulder and the locking nut, and the ratchet and the brake rod are connected by a threaded pair; the other is that the ratchet and the brake rod are fixedly connected as a whole, Then through the shoulder of the brake rod, the lock nut and the square pin form a rotating pair. This kind of compensation device is ready to use when the brake is installed without on-site adjustment, and the compensation device has a better compensation effect when the parts are not damaged, and is gradually being recognized by users. The invention patent "A lever assembly of a ratchet-type compensation device for industrial brakes" (application number: 201510725151.8) improves the lever assembly part of the automatic compensation device, and achieves the effect of popularization and application. However, the ratchet part of the aforementioned ratchet-type automatic compensation device is limited by the structural size that needs to be matched with each other for the compensation action, and each motion pair is basically exposed, lacking technical means such as anti-vibration, dust-proof, and rust-proof. The ratchet wheel and the threaded pair used for compensation have serious faults such as jamming and rusting, and even there is a problem of "overcompensation", which cannot achieve the effect of automatic compensation without manual maintenance, which hinders the popularization and application of ratchet-type compensation devices. To solve the problem of stable operation of the ratchet assembly, and through the matching application with the aforementioned lever assembly, the real industrial brake can be used without manual maintenance.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve the problems of anti-vibration, jamming and rusting existing in the above-mentioned industrial brake ratchet-type automatic compensation device, and adopt an improved structure to achieve the effect of long-term stable use of the ratchet-type automatic compensation device.

The technical scheme adopted in the present invention is: a ratchet wheel assembly of a ratchet wheel type automatic compensation device of an industrial brake, comprising a ratchet wheel, a ratchet wheel shaft, a ratchet wheel shoulder and a ratchet wheel tooth are arranged outside the ratchet wheel, and a ratchet wheel center hole is arranged inside the ratchet wheel, The ratchet shaft is provided with a ratchet inner thread at a corresponding position inside the ratchet shaft; the ratchet assembly further includes a protective tube, a set screw and a square pin, the square pin is provided with a square pin hole, and the ratchet shaft passes through the square pin hole , and then connect with the protective tube in a shaft and hole manner, and use the set screw to fasten the protective tube on the ratchet shaft, the ratchet is axially positioned by the ratchet shaft shoulder, the protective tube The rear end surface is in contact with the side surface of the square pin, and the square pin is mounted on the lever; the ratchet assembly further includes a brake lever, and after the ratchet shaft passes through the square pin hole, the brake lever is connected to the lever. The ratchet wheel is connected by the internal thread of the ratchet wheel, and the other end of the brake rod is fixedly connected to the pin shaft of the brake arm; the ratchet wheel assembly further includes a protective tube cover, which is arranged at the front end of the protective tube; the ratchet wheel assembly It also includes a ratchet cover, which is installed at the end of the central hole of the ratchet; the central hole of the ratchet and the brake rod and the ratchet cover form a ratchet cavity; the protective tube and the brake A protective tube cavity is formed between the tie rods.

Further, the square pin is provided with a square pin counterbore, and a sealing ring is installed inside.

Further, the ratchet wheel is provided with a lubricating hole and a lubricating groove in the matching range between the ratchet shaft and the square pin hole, and the lubricating hole and the lubricating groove are communicated with the ratchet wheel cavity.

Further, the length of the ratchet cavity, the protective tube cavity and the protective tube cover is greater than the length of the compensation thread on the brake rod.

The operating principle of the present invention is as follows: when the brake is working, the brake lever is fixed and does not rotate, the ratchet assembly is limited by the structure and the assembly relationship after assembly, and the ratchet rotation is only controlled by the lever assembly, which can effectively prevent the brake from being located. The influence of the vibration of the equipment and the brake itself, so as to ensure the accuracy of the operation of the ratchet assembly and avoid the problem of "overcompensation". The compensation thread is placed in a closed cavity, and grease is added to the ratchet cavity and the protective tube cavity. In addition to lubricating the compensation thread, the grease in the protective tube cavity also prevents external water and dust. and corrosive gas damage compensation thread; when the ratchet assembly and the lever assembly are installed on the brake and put into use, with the progress of automatic compensation, the lever of the lever assembly rotates the ratchet wheel, and the external thread of the brake lever gradually extends into the ratchet cavity, while completing the compensation action, the volume of the ratchet cavity is gradually reduced, and the grease added in it is squeezed into the mating surface of the ratchet shaft and the square pin hole through the lubricating hole and the lubricating groove to complete the alignment of the ratchet. The rotating pair formed by the axle and the square pin hole is lubricated, and the loss of grease is prevented by the sealing ring in the square pin counterbore. When the brake pads are worn and need to be replaced, re-grease the above cavities.

The beneficial effects of the present invention are as follows:

1. Since the original automatic compensation device fixes the ratchet on the brake rod or sets the compensation thread at the position of the ratchet teeth, and the automatic rod rotates during compensation, the vibration will be transmitted to the ratchet and cause the circumferential position of the ratchet teeth to change, affecting the compensation operation. accuracy. The invention fixes the brake rod, and at the same time utilizes the mutual restriction and good lubrication of the various parts of the ratchet assembly, which effectively avoids the influence of vibration on the automatic compensation device, eliminates the problem of "overcompensation", and ensures the long-term stability of the automatic compensation device. run.

2. Add grease to the ratchet cavity, on the one hand, lubricate the compensation thread of the brake lever, and more importantly: use the compensation action to continuously add grease for a long time while the brake mechanism is used for automatic compensation. To the mating surface of the ratchet shaft and the square pin hole, it ensures the flexible operation of the ratchet and prevents the ratchet from being stuck due to rust and other reasons.

3. The brake rod compensation thread is placed in the protective tube, and grease is added to the protective tube cavity, which can prevent external dust from adhering to the brake rod compensation thread while ensuring the flexible operation of the compensation thread, and prevent water, Dust, corrosive gas, etc. will corrode the compensation thread of the brake rod, so as to avoid the situation of compensation failure caused by stagnation and jamming.

4. The structural treatment of the ratchet assembly not only well adapts to the various environmental conditions, geometric dimensions, installation dimensions and other requirements of the brake for the compensation mechanism, but also can be well matched with the lever of "a ratchet-type compensation device of an industrial brake. components” (application number: 201510725151.8), to completely solve the problem of automatic compensation of industrial brakes.

Description of drawings

Figure 1: Ratchet assembly assembly drawing.

Figure 2: Ratchet parts diagram.

FIG. 3 : A-A sectional view of FIG. 2 .

FIG. 4 : B-B sectional view of FIG. 2 .

Figure 5: Square pin parts diagram.

FIG. 6 : C-C sectional view of FIG. 5 .

Figure 7: Schematic diagram of the ratchet-type automatic compensation device.

Figure 8: An embodiment of a brake incorporating the ratchet assembly of the present invention.

The names of the parts corresponding to the serial numbers in the figure are explained as follows:

Components include: ratchet assembly 1, lever assembly 2, lever 3, brake frame 4;

The parts of the ratchet assembly include: the brake rod 11 , the protective tube cover 12 , the protective tube 13 , the set screw 14 , the sealing ring 15 , the square pin 16 , the ratchet wheel 17 , and the ratchet wheel cover 18 .

The identification of the structural features of the components in the figure is explained as follows:

Ratchet cavity 19, protective tube cavity 20, compensation thread length L, ratchet cavity length K, protective tube cavity and protective tube cover length M, ratchet inner thread 171, lubricating groove 172, ratchet shaft 173, ratchet teeth 174, Ratchet center hole 175 , ratchet shaft shoulder 176 , lubrication hole 177 , square pin countersunk hole 161 , square pin hole 162 , square pin short shaft 163 .

Detailed ways

The main structural features and action principles of the present invention will be further described below with reference to the accompanying drawings.

Figures 2, 3 and 4 show the structural features of the ratchet wheel 17: the ratchet wheel 17 has a ratchet wheel shaft 173 at one end and a ratchet wheel tooth 174 at the other end, with a ratchet wheel shoulder 176 between them; the center of the ratchet wheel 17 is a through hole, the through hole Coaxial with the ratchet shaft 173 and the ratchet teeth 174, one end of the through hole is the ratchet inner thread 171, and the other end is the ratchet center hole 175; in the range of the ratchet shaft 173 and the square pin hole 162, a lubrication hole 177 is provided on the ratchet shaft 173 and the lubricating groove 172, and communicate with the central hole 175 of the ratchet.

5 and 6 show the structural features of the square pin 16: the two ends of the square pin 16 are short shafts 163, the middle is square, the middle square part is perpendicular to the short axis 163 of the square pin, and there is a square pin hole 162. The square pin hole 162 There is a square pin counterbore 161 at one end.

FIG. 1 is an assembly view of the ratchet assembly of the present invention. The ratchet assembly 1 includes a brake rod 11 , a protective tube cover 12 , a protective tube 13 , a set screw 14 , a sealing ring 15 , a square pin 16 , a ratchet wheel 17 , and a ratchet wheel cover 18 . The assembly relationship is as follows: the ratchet shaft 173 passes through the square pin hole 162 with clearance fit, and is then connected with the protective tube 13 by shaft and hole clearance fit, and the protective tube 13 is fastened on the ratchet shaft 173 by the set screw 14 , the ratchet wheel 17 is axially positioned by the ratchet wheel shoulder 176, the rear end surface of the protective tube 13 is in contact with the side surface of the square pin 16; the end of the brake rod 11 has an external thread, and the length of the compensation thread used for the wear of the lining is L. The pull rod 11 is connected with the ratchet inner thread 171 through the external thread, and the other end of the brake pull rod 11 is fixedly connected to the pin shaft of the brake arm; the ratchet wheel cover 18 is fitted on the end of the ratchet wheel center hole 175 with interference fit; the protective tube cover 12 is interfered with Fitted with the front end of the protective tube 13; a sealing ring 15 is installed in the square pin countersunk hole 161, the two sides of the sealing ring 15 are closely fitted with the square pin countersunk hole 161 and the rear end surface of the protective tube 13, and the inner circle of the sealing ring 15 is close to the The ratchet shaft 173 fits tightly. After assembly, the ratchet cavity 19 is formed in the central hole 175 of the ratchet by the ratchet wheel 17, the ratchet wheel cover 18 and the brake lever 11; cavity 20. After the ratchet assembly 1 is assembled, the whole is mounted on the lever 3 through the short shaft 163 of the square pin.

It should be noted that: the lever assembly 2, the lever 3, etc. in FIG. 7 are not within the scope of protection of the present invention, so they are represented by a dashed-dotted line.

Referring to FIGS. 1 and 7 , the action principle of the present invention is: since the brake lever 11 is fixed and does not rotate, and the ratchet assembly 1 is limited by the frictional resistance between the structure and the parts generated after assembly after assembly, it can effectively avoid vibration to the ratchet wheel. operational impact. After the ratchet assembly 1 is assembled, the ratchet wheel 17 and the protective tube 12 can rotate synchronously in the square pin hole 162, but cannot move axially; grease is added in the ratchet wheel cavity 19 and the protective tube cavity 20; when compensation is not required During the swinging process, the lever 3 drives the lever assembly 1 to slide between the teeth of the ratchet teeth 174; when the lining wear needs to be compensated, the lever 3 drives the lever assembly 1 to toggle the ratchet wheel 17 during the rising and swinging process, and the ratchet wheel 17 rotates One tooth pitch; the brake lever 11 does not rotate when the brake is working, so the compensation action is realized by tightening the brake arms on both sides through the outer thread of the brake lever 11 and the inner thread 171 of the ratchet, and the outer thread of the brake lever 11 gradually extends into the ratchet wheel In the cavity 19, the volume of the ratchet cavity 19 is gradually reduced, and the grease is squeezed into the mating surface of the ratchet 17 and the square pin 16 through the lubricating hole 177 and the lubricating groove 172, so as to achieve the purpose of lubricating and preventing rust, and ensuring the operation of the ratchet during compensation. Flexible; a sealing ring 15 is installed in the square pin counterbore 161, which closely fits with the square pin counterbore 161, the ratchet shaft 173 and the rear end surface of the protective tube 13, and prevents the loss of grease; the protective tube cavity 20 is also added with a The grease can lubricate the compensation thread, prevent external dust from adhering to the compensation thread of the brake rod, and prevent the corrosive gas from corroding the compensation thread of the brake rod.

As shown in Figure 1, the length of the compensation thread of the brake rod is L, the length of the ratchet cavity is K, the length of the protective tube cavity and the protective tube cover is M, and K and M are greater than L, and the compensation thread is placed in the closed cavity, At the same time, it is ensured that the operation of the brake lever 11 is not hindered during the service life of the brake pad.

When replacing the brake lining, the brake lever 11 can be unscrewed and the grease can be replenished.

The structure shown in the present invention does not exclude the change of the partial structure and assembling means of the parts that meet the functional requirements, such as the ratchet cover is changed to a detachable way, the protective tube and the ratchet shaft are changed to a threaded pair connection, etc.

Embodiment 1: Referring to Figure 8, when the present invention is used for drum brakes or conical brakes, the ratchet assembly 1 is installed in the pin hole of the brake lever 3 through the square pin short shaft 163, and the other end of the brake lever 11 is fixedly connected to the on the pin of the brake arm. The brake frame 4 of this embodiment includes components such as brake arms, springs, pushers, brake shoes, and bases. When the pusher pushes the lever 3 to swing, the lever assembly 2 can move the ratchet wheel 17 of the ratchet wheel assembly 1 to rotate. Through good lubrication and the restraint of the mutual assembly of the parts, the effect of ensuring the flexible operation of the mechanism and the compensation and stability can be achieved for a long time. .

Embodiment 2: When the present invention is applied to the electric hydraulic disc brake, the ratchet assembly 1 is mounted on the brake lever 3, and its action principle is the same as that of the first embodiment.

Claims (4)

1. A ratchet wheel component of a ratchet wheel type automatic compensation device of an industrial brake is characterized in that: the ratchet wheel structure comprises a ratchet wheel (17), wherein a ratchet wheel shaft (173), a ratchet wheel shaft shoulder (176) and ratchet wheel teeth (174) are arranged outside the ratchet wheel (17), a ratchet wheel center hole (175) is formed in the ratchet wheel (17), and ratchet wheel internal threads (171) are arranged in corresponding positions in the ratchet wheel shaft (173); the ratchet wheel assembly (1) further comprises a protective tube (13), a set screw (14) and a square pin (16), the square pin (16) is provided with a square pin hole (162), the ratchet wheel shaft (173) penetrates through the square pin hole (162) and is connected with the protective tube (13) in a shaft-hole mode, the protective tube (13) is fastened on the ratchet wheel shaft (173) through the set screw (14), the ratchet wheel (17) is axially positioned through a ratchet wheel shaft shoulder (176), the rear end face of the protective tube (13) is attached to the side face of the square pin (16), and the square pin (16) is mounted on the lever (3); the ratchet wheel assembly (1) further comprises a brake pull rod (11), after the ratchet wheel shaft (173) penetrates through the square pin hole (162), the brake pull rod (11) is connected with the ratchet wheel (17) through the ratchet wheel internal thread (171), and the other end of the brake pull rod (11) is fixedly connected to a pin shaft of a brake arm; the ratchet wheel assembly (1) further comprises a protective tube cover (12) arranged at the front end of the protective tube (13); the ratchet assembly (1) further comprises a ratchet cover (18), and the ratchet cover (18) is installed at the end part of the ratchet central hole (175); the ratchet central hole (175) and the brake pull rod (11) form a ratchet cavity (19) with the ratchet cover (18); a protective tube cavity (20) is formed between the protective tube (13) and the brake pull rod (11).

2. The ratchet assembly of the ratchet type automatic compensating apparatus for industrial brake as claimed in claim 1, wherein: the square pin (16) is provided with a square pin counter bore (161) which is internally provided with a sealing ring (15).

3. The ratchet assembly of the ratchet type automatic compensating apparatus for industrial brake as claimed in claim 2, wherein: the ratchet (17) is provided with a lubricating hole (177) and a lubricating groove (172) in the matching range of the ratchet shaft (173) and the square pin hole (162), and the lubricating hole (177) and the lubricating groove (172) are communicated with the ratchet cavity (19).

4. The ratchet assembly of the ratchet type automatic compensating apparatus for industrial brake as claimed in claim 3, wherein: the length (K) of the ratchet cavity and the length (M) of the protecting tube cavity and the protecting tube cover are greater than the length (L) of the compensating thread on the brake pull rod.

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