Constant torque limiter

Abstract

The utility model discloses a constant torque limiter in the field of constant torque limiters, which comprises a first shaft barrel, an abutting plate, a mounting disc, a bearing, a second shaft barrel, a limiting mechanism and an adjusting mechanism, and the abutting plate is fixedly connected to the outer side of the first shaft barrel through the adjusting mechanism. The mounting disc is fixedly connected to the right portion of the outer side wall of the first shaft barrel and located on the right side of the abutting plate, the bearing is fixedly connected to the right portion of the outer side wall of the first shaft barrel, and according to the constant-torque limiter, when overload occurs, the notches extrude the balls, the balls move leftwards, the abutting plate is extruded, the abutting plate moves leftwards, and the constant-torque limiter is fixed to the outer side wall of the first shaft barrel. When the positioning rod is aligned with the fixing cavity, the positioning rod is embedded in the fixing cavity through reset extension of the reset spring, the abutting plate is positioned, the situation that the ball repeatedly enters and exits the interior of the notch under the action of the extrusion spring is avoided, impact on the ball is reduced, abrasion is reduced, and the service life of the device is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of constant torque limiters, in particular to a constant torque limiter. Background Art

[0002] A torque limiter is an overload protection device. When the torque generated by the machine due to vibration, overload or mechanical failure exceeds the initial set value, it limits the torque transmitted by the transmission system by relative sliding with the central element, thereby preventing machine damage and avoiding losses caused by downtime. Torque limiters include friction type and ball type. Among them, ball type torque limiters are widely used due to their low rolling friction and low wear.

[0003] When the current ball-type torque limiter is in use and is overloaded, the notch will squeeze the ball, causing the ball to pop out. When the ball is aligned with the notch, the elastic force of the disc spring causes the ball to re-enter the notch. This repeated process increases the wear of the ball and reduces the service life of the torque limiter. For this reason, we have proposed a constant torque limiter. Utility Model Content

[0004] The utility model aims to provide a constant torque limiter to solve the problem in the background technology that when the current ball-type torque limiter is overloaded, the ball repeatedly enters and exits the slot, resulting in increased wear of the ball and reduced service life of the torque limiter.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a constant torque limiter, comprising a first shaft cylinder, a resist plate, a mounting plate, a bearing, a second shaft cylinder, a limiting mechanism and an adjusting mechanism, wherein the resist plate is fixedly connected to the outer side of the first shaft cylinder through the adjusting mechanism, the mounting plate is fixedly connected to the right part of the outer side wall of the first shaft cylinder and is located on the right side of the resist plate, the bearing is fixedly connected to the right part of the outer side wall of the first shaft cylinder and is located on the right side of the mounting plate, the second shaft cylinder is fixedly connected to the outer side wall of the bearing, the limiting mechanism is fixedly connected to the outer side of the mounting plate, a ball groove is penetrated through the left side of the mounting plate, and the ball groove A ball is connected for internal rolling connection, and slots are evenly provided on the left side of the second shaft cylinder. The limiting mechanism includes a connecting ring, a fixed cavity, a push rod, an installation cavity, a return spring, a clamping plate and a positioning rod. The outer wall of the installation disk is fixedly connected with a connecting ring, and a fixed cavity is symmetrically penetrated through the left part of the outer wall of the connecting ring, and a push rod is slidably clamped inside the fixed cavity, and an installation cavity is symmetrically provided inside the abutment plate. A return spring is fixedly connected to the middle part of the mutually approaching sides of the top and bottom installation cavities, and the mutually distant ends of the return springs at the top and bottom are fixedly connected to a clamping plate, and the mutually distant ends of the top and bottom clamping plates are fixedly connected to the positioning rod.

[0006] As a further description of the above technical solution:

[0007] The abutment plate is located inside the connection ring, and the outer side wall of the abutment plate is in contact with the inner side wall of the connection ring.

[0008] As a further description of the above technical solution:

[0009] The clamping plate is slidably connected to the interior of the installation cavity, and the outer side wall of the clamping plate is in contact with the inner side wall of the installation cavity.

[0010] As a further description of the above technical solution:

[0011] An adjustment mechanism is fixedly connected to the left side of the outer wall of the first shaft cylinder, and the adjustment mechanism includes a threaded cylinder, a rotating disk, a movable disk, an extrusion spring, a sliding groove and a sliding block. A threaded cylinder is fixedly connected to the left part of the outer wall of the first shaft cylinder, a rotating disk is screwed to the outer wall of the threaded cylinder through a thread, a movable disk is sleeved on the outer side of the threaded cylinder, an extrusion spring is fixedly connected to the right side of the movable disk, sliding grooves are symmetrically opened on the outer wall of the threaded cylinder, and sliding blocks are symmetrically fixedly connected to the inner wall of the abutment plate.

[0012] As a further description of the above technical solution:

[0013] A baffle is fixedly connected to the left side of the threaded cylinder, and an outer side wall of the rotating disk is provided with anti-slip grooves.

[0014] As a further description of the above technical solution:

[0015] The extrusion spring is sleeved on the outer side of the threaded barrel, the sliding block is slidably connected to the inside of the sliding groove, and the abutment plate is sleeved on the outer side of the threaded barrel.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. When the constant torque limiter is overloaded, the notch squeezes the ball to move the ball to the left, squeezes the abutment plate to move the abutment plate to the left, and when the positioning rod is aligned with the fixed cavity, the reset spring extends to make the clamping plate drive the positioning rod to extend, so that the positioning rod is embedded in the fixed cavity, and the abutment plate is positioned to prevent the ball from repeatedly entering and exiting the notch under the action of the squeeze spring, thereby reducing the impact on the ball, reducing wear, and improving the service life of the device.

[0018] 2. The constant torque limiter rotates the rotating disk to move the rotating disk outside the threaded barrel, squeezes the movable disk, and thus moves the movable disk, squeezes the extrusion spring, and deforms the extrusion spring, thereby facilitating the adjustment of the torque of the device, facilitating adjustment according to different usage scenarios, and improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a constant torque limiter proposed by the utility model;

[0020] Figure 2 A schematic diagram of a ball installation structure of a constant torque limiter proposed by the utility model;

[0021] Figure 3 A schematic diagram of the structure of a limiting mechanism of a constant torque limiter proposed by the utility model;

[0022] Figure 4 The utility model provides a schematic diagram of the structure of the regulating mechanism of the constant torque limiter.

[0023] In the figure: 100, first shaft cylinder; 200, abutment plate; 300, mounting plate; 310, ball groove; 320, ball; 400, bearing; 500, second shaft cylinder; 510, notch; 600, limit mechanism; 610, connecting ring; 620, fixing cavity; 630, push rod; 640, mounting cavity; 650, reset spring; 660, clamping plate; 670, positioning rod; 700, adjusting mechanism; 710, threaded cylinder; 720, rotating disk; 730, moving disk; 740, extrusion spring; 750, slide groove; 760, slider. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present 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 on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] The utility model provides a constant torque limiter to prevent the ball from repeatedly entering and exiting the slot under the action of the extrusion spring, thereby reducing the impact on the ball, reducing wear and tear, and increasing the service life of the device. Figure 1-4 , including a first shaft cylinder 100, a stop plate 200, a mounting plate 300, a bearing 400, a second shaft cylinder 500, a limiting mechanism 600 and an adjusting mechanism 700;

[0028] Please refer again Figure 1 , the first shaft cylinder 100 is used to install the abutment plate 200, the mounting plate 300, the bearing 400, the second shaft cylinder 500, the limiting mechanism 600 and the adjusting mechanism 700;

[0029] Please refer again Figure 2The stop plate 200 is fixedly connected to the outer side of the first shaft cylinder 100 through the adjustment mechanism 700. The mounting plate 300 is fixedly connected to the right part of the outer side wall of the first shaft cylinder 100, and is used to open a ball groove 310, and is located on the right side of the stop plate 200. The bearing 400 is fixedly connected to the right part of the outer side wall of the first shaft cylinder 100, and is used to install the second shaft cylinder 500, and is located on the right side of the mounting plate 300. The second shaft cylinder 500 is fixedly connected to the outer side wall of the bearing 400. The limiting mechanism 600 is fixedly connected to the outer side of the mounting plate 300. A ball groove 310 is opened through the left side of the mounting plate 300, and a ball 320 is rollingly connected inside the ball groove 310. Notches 510 are evenly opened on the left side of the second shaft cylinder 500.

[0030] Please refer again Figure 3 The limiting mechanism 600 includes a connecting ring 610, a fixing cavity 620, a pressing rod 630, a mounting cavity 640, a return spring 650, a clamping plate 660 and a positioning rod 670;

[0031] Please refer again Figure 3 The outer wall of the mounting plate 300 is fixedly connected with a connecting ring 610, and a fixing cavity 620 is symmetrically penetrated through the left part of the outer wall of the connecting ring 610, and a pressing rod 630 is slidably engaged inside the fixing cavity 620, and a mounting cavity 640 is symmetrically opened inside the abutment plate 200;

[0032] Please refer again Figure 3 A return spring 650 is fixedly connected to the middle of the mutually approaching sides of the top and bottom installation cavities 640, a clamping plate 660 is fixedly connected to the mutually distant ends of the top and bottom return springs 650, and a positioning rod 670 is fixedly connected to the middle of the mutually distant ends of the top and bottom clamping plates 660.

[0033] To summarize, when overloaded, the slot 510 squeezes the ball 320, causing the ball 320 to move to the left, and squeezes the abutment plate 200, causing the abutment plate 200 to move to the left. When the positioning rod 670 is aligned with the fixed cavity 620, the reset spring 650 is extended to cause the clamping plate 660 to extend the positioning rod 670, so that the positioning rod 670 is embedded in the fixed cavity 620, positioning the abutment plate 200, and preventing the ball 320 from repeatedly entering and exiting the slot 510 under the action of the squeezing spring 740, thereby reducing the impact on the ball 320, reducing wear, and improving the service life of the device.

[0034] Please refer again Figure 2 The abutment plate 200 is located inside the connection ring 610 , and the outer wall of the abutment plate 200 is in contact with the inner wall of the connection ring 610 .

[0035] Please refer again Figure 3The clamping plate 660 is slidably connected to the interior of the installation cavity 640 , and the outer wall of the clamping plate 660 is in contact with the inner wall of the installation cavity 640 .

[0036] Please refer again Figure 4 The left side of the outer wall of the first shaft cylinder 100 is fixedly connected with an adjustment mechanism 700, and the adjustment mechanism 700 includes a threaded cylinder 710, a rotating disk 720, a movable disk 730, an extrusion spring 740, a slide groove 750 and a slider 760. The left part of the outer wall of the first shaft cylinder 100 is fixedly connected with a threaded cylinder 710, the outer wall of the threaded cylinder 710 is screwed with a rotating disk 720 through a thread, the outer side of the threaded cylinder 710 is sleeved with a movable disk 730, and the right side of the movable disk 730 is fixedly connected with an extrusion spring 740, the outer wall of the threaded cylinder 710 is symmetrically provided with slide grooves 750, and the inner wall of the back plate 200 is symmetrically fixedly connected with a slider 760.

[0037] Please refer again Figure 4 A baffle is fixedly connected to the left side of the threaded cylinder 710, and an outer wall of the rotating disk 720 is provided with anti-slip grooves.

[0038] Please refer again Figure 4 The extrusion spring 740 is sleeved on the outer side of the threaded tube 710 , the slider 760 is slidably connected to the inside of the slide groove 750 , and the stop plate 200 is sleeved on the outer side of the threaded tube 710 .

[0039] To summarize, by rotating the rotating disk 720, the rotating disk 720 moves outside the threaded cylinder 710, squeezing the movable disk 730, thereby moving the movable disk 730, squeezing the squeezing spring 740, and deforming the squeezing spring 740, thereby facilitating the adjustment of the torque of the device, and facilitating adjustment according to different usage scenarios, thereby improving the practicality of the device.

[0040] In specific use, when adjusting the torque, the technical personnel in this field rotate the rotating disk 720 so that the rotating disk 720 moves outside the threaded cylinder 710, squeezes the movable disk 730, thereby moving the movable disk 730, squeezes the squeezing spring 740, and deforms the squeezing spring 740, so that the force squeezing on the abutment plate 200 changes, and the torque is increased. When overloaded, the active shaft drives the second shaft cylinder 500 to rotate, so that the notch 510 squeezes the ball 320, so that the ball 320 moves to the left, squeezes the abutment plate 200, and moves the abutment plate 200 to the left. When the positioning rod 670 is aligned with the fixed cavity 620, it is extended by the reset spring 650. The clamping plate 660 drives the positioning rod 670 to extend, so that the positioning rod 670 is embedded in the fixed cavity 620, and the push plate 200 is positioned to prevent the push plate 200 from driving the ball 320 to repeatedly enter and exit the slot 510 under the pressure of the squeezing spring 740. When it needs to be released, the push rod 630 is pressed to squeeze the positioning rod 670, so that the positioning rod 670 withdraws from the fixed cavity 620. Under the action of the squeezing spring 740, the push plate 200 is reset to make the ball 320 subject to force. When the ball 320 is aligned with the slot 510, the ball 320 is embedded in the slot 510, so that the second shaft cylinder 500 drives the first shaft cylinder 100 to rotate again.

[0041] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", 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 utility model. In this specification, the schematic representation of the above terms does 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.

[0042] 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 constant torque limiter, characterized in that: The invention comprises a first shaft cylinder (100), a stop plate (200), a mounting plate (300), a bearing (400), a second shaft cylinder (500), a limiting mechanism (600) and an adjusting mechanism (700), wherein the stop plate (200) is fixedly connected to the outer side of the first shaft cylinder (100) through the adjusting mechanism (700), the mounting plate (300) is fixedly connected to the right part of the outer side wall of the first shaft cylinder (100) and is located on the right side of the stop plate (200), and the shaft cylinder (500) is fixedly connected to the outer side wall of the first shaft cylinder (100) and is located on the right side of the stop plate (200). The bearing (400) is fixedly connected to the right part of the outer wall of the first shaft cylinder (100) and is located on the right side of the mounting plate (300). The second shaft cylinder (500) is fixedly connected to the outer wall of the bearing (400). The limiting mechanism (600) is fixedly connected to the outer side of the mounting plate (300). A ball groove (310) is provided on the left side of the mounting plate (300). A ball (320) is rollingly connected inside the ball groove (310). The second shaft cylinder (500) is fixedly connected to the outer wall of the bearing (400). The left side of the cylinder (500) is evenly provided with notches (510), the limiting mechanism (600) comprises a connecting ring (610), a fixing cavity (620), a pressing rod (630), an installation cavity (640), a reset spring (650), a clamping plate (660) and a positioning rod (670), the outer side wall of the installation plate (300) is fixedly connected with a connecting ring (610), the left side of the outer side wall of the connecting ring (610) is symmetrically penetrated with a fixing cavity (620), the fixing A pressing rod (630) is slidably engaged inside the cavity (620), and an installation cavity (640) is symmetrically opened inside the abutment plate (200). A return spring (650) is fixedly connected to the middle of the mutually approaching sides of the top and bottom installation cavities (640), and a clamping plate (660) is fixedly connected to the mutually distant ends of the top and bottom return springs (650), and a positioning rod (670) is fixedly connected to the middle of the mutually distant sides of the top and bottom clamping plates (660).

2. A constant torque limiter according to claim 1, characterized in that: The abutment plate (200) is located inside the connection ring (610), and the outer side wall of the abutment plate (200) is in contact with the inner side wall of the connection ring (610).

3. A constant torque limiter according to claim 1, characterized in that: The clamping plate (660) is slidably connected to the interior of the installation cavity (640), and the outer wall of the clamping plate (660) is in contact with the inner wall of the installation cavity (640).

4. A constant torque limiter according to claim 1, characterized in that: An adjustment mechanism (700) is fixedly connected to the left side of the outer wall of the first shaft cylinder (100), and the adjustment mechanism (700) includes a threaded cylinder (710), a rotating disk (720), a movable disk (730), an extrusion spring (740), a slide groove (750) and a slider (760). The left part of the outer wall of the first shaft cylinder (100) is fixedly connected to the threaded cylinder (710), the outer wall of the threaded cylinder (710) is screwed with the rotating disk (720) through a thread, the outer side of the threaded cylinder (710) is sleeved with the movable disk (730), and the right side of the movable disk (730) is fixedly connected to the extrusion spring (740), the outer wall of the threaded cylinder (710) is symmetrically provided with slide grooves (750), and the inner wall of the abutment plate (200) is symmetrically fixedly connected with the slider (760).

5. A constant torque limiter according to claim 4, characterized in that: A baffle is fixedly connected to the left side of the threaded cylinder (710), and an outer side wall of the rotating disk (720) is provided with anti-slip grooves.

6. A constant torque limiter according to claim 4, characterized in that: The extrusion spring (740) is sleeved on the outer side of the threaded barrel (710), the sliding block (760) is slidably connected to the inside of the sliding groove (750), and the abutment plate (200) is sleeved on the outer side of the threaded barrel (710).

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