Chain adjusting device

Abstract

The utility model relates to the technical field of chain tools, in particular to a chain adjusting device which comprises two side plates, the two side plates are fixedly connected to the surface of a base, shaft grooves are formed in the surfaces of the side plates, wheel shafts are connected to the surfaces of the shaft grooves in a sliding mode, chain wheels are connected to the surfaces of the wheel shafts in a rotating mode, and toothed plates are fixedly connected to the surfaces of the upper ends of the shaft grooves. Inserting blocks are slidably connected to the surfaces of the toothed plates and inserted into the surfaces of the side plates, gears are inserted into the surfaces of the wheel shafts, handles are rotatably connected to the surfaces of the wheel shafts, and the handles abut against the surfaces of the handle grooves to limit the gears. The device has the beneficial effects that the movable toothed plate and the gear are arranged, movement of the wheel shaft and the chain wheel is achieved, accordingly, the tightness of the chain is adjusted, operation is easy, the adjusting efficiency and the stability of the wheel shaft are improved, the gear can be clamped and fixed through the handle and the through hole, rapid disassembly and assembly of the gear and the wheel shaft are achieved, and the device is convenient to use. And the maintenance and replacement cost of the adjusting device is reduced.

Description

Technical Field

[0001] This utility model relates to the field of chain tooling technology, specifically a chain adjustment device. Background Technology

[0002] Chain drive is a transmission method that uses a chain to transmit the motion and power of a driving sprocket with a special tooth profile to a driven sprocket with a special tooth profile. Chain drives have many advantages: compared to belt drives, they eliminate elastic slippage and slippage, have an accurate average transmission ratio, are reliable, and highly efficient; they transmit large amounts of power, have strong overload capacity, and are smaller in size for the same operating conditions; they require less tension and exert less pressure on the shaft; and they can operate in harsh environments such as high temperature, humidity, dust, and pollution.

[0003] In the prior art, Chinese utility model patent with authorization announcement number "CN208651552U" specifically describes "a chain tensioning device". In the embodiment, it is described that "the two sides of the mounting base are respectively threaded with adjusting bolts for horizontally adjusting the position of the wheel axle. The threaded head of the adjusting bolt extends into the slide groove and abuts against the wheel axle. To prevent the adjusting bolt from rotating arbitrarily, a locking nut is installed on the adjusting bolt. The locking nut is used to further fix the wheel axle and lock the locking nut to prevent the wheel axle from moving in the slide groove, thus ensuring the stability of the chain drive. A limiting spring is also installed on the wheel axle to fix the wheel axle. The limiting spring is set to further limit the movement and rotation of the wheel axle 2".

[0004] However, when using adjusting bolts and locking nuts to adjust the position of the wheel axle, wrenches and other tools are needed to tighten the bolts and nuts, which is cumbersome, time-consuming and labor-intensive. The springs fixed on the surface of the wheel axle will fatigue after long-term use, causing the wheel axle to lose its grip in the groove, thus reducing the stability of the wheel axle. In addition, the wheel axle and the adjusting device are a whole, which is difficult to disassemble and replace, resulting in high maintenance and replacement costs. Utility Model Content

[0005] The purpose of this invention is to provide a chain adjustment device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a chain adjustment device, comprising two side plates, which are respectively fixedly connected to the two sides of the surface of a base. The surface of the side plates is provided with a shaft groove, and a wheel axle is slidably connected to the surface of the shaft groove. A sprocket is rotatably connected to the surface of the wheel axle. A toothed plate is fixedly connected to the upper end surface of the shaft groove. Insert blocks are slidably connected to the two sides of the toothed plate. The insert blocks are inserted into the surface of the side plates to brake the toothed plate. A gear is inserted into the surface of the wheel axle, and a handle is rotatably connected to the surface of the wheel axle. The surface of the handle is provided with a through hole and a handle groove. The handle presses against the surface of the handle groove to limit the gear.

[0007] Preferably, the shaft groove is a "T" shaped groove in cross section, slots are provided on both sides of the shaft groove, multiple lower toothed grooves are provided on the lower end surface of the shaft groove, the multiple lower toothed grooves are arranged in an array, a rubber block is fixedly connected to the upper end surface of the shaft groove, and the other end of the rubber block is fixedly connected to the surface of the toothed plate.

[0008] Preferably, the toothed plate has a square plate structure, and multiple upper tooth grooves are formed on the lower end surface of the toothed plate. The upper tooth grooves are arranged in an array and correspond to and match the lower tooth grooves on the shaft groove surface. Sliding grooves are formed on both sides of the toothed plate. The sliding grooves are square grooves.

[0009] Preferably, grooves are formed on both sides of the slide groove, a rubber strip is fixedly connected to one end of the groove, a slider is fixedly connected to the other end of the rubber strip, one side of the slider is fixedly connected to the surface of the insert, the insert has an "L" shaped plate structure, and one end of the insert is inserted into the surface of the slot.

[0010] Preferably, the axle has a cylindrical rod structure, and annular grooves are formed on both sides of the axle surface. The gear is inserted into the surface of the annular groove. Rotary grooves are formed on both ends of the axle. The rotary grooves are annular grooves with a "T"-shaped cross section. A rotating plate is rotatably connected to the surface of the rotary groove. The rotating plate has a circular plate structure. A rubber pad is fixedly connected to one end of the rotating plate. The other end of the rubber pad is fixedly connected to the surface of the handle. The handle has a square plate structure.

[0011] Preferably, the two ends of the axle are provided with limiting grooves, which are square grooves and are connected to the handle groove. The handle is engaged with the surface of the handle groove and the limiting groove. The handle groove and the through hole are perpendicularly distributed.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] The chain adjustment device proposed in this utility model is equipped with a movable toothed plate and gears, which realizes the movement of the wheel axle and sprocket, thereby realizing the adjustment of chain tension. It is simple to operate, improves adjustment efficiency and wheel axle stability, and the handle and through hole can not only clamp and fix the gear, but also realize the quick disassembly and installation of the gear and wheel axle, reducing the maintenance and replacement cost of the adjustment device. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a half-sectional schematic diagram of the structure of this utility model;

[0016] Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0017] Figure 4 for Figure 2 Enlarged schematic diagram of the structure at point B;

[0018] Figure 5 This is a schematic diagram of the gear structure of this utility model.

[0019] In the diagram: 1. Side plate; 2. Base; 3. Sprocket; 4. Axle; 5. Shaft groove; 6. Rubber block; 7. Gear; 8. Handle; 9. Tooth plate; 10. Slide groove; 11. Insert block; 12. Rubber strip; 13. Slider; 14. Slot; 15. Rotary groove; 16. Rubber pad; 17. Rotating plate; 18. Through hole; 19. Handle groove; 20. Limiting groove. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] Example 1

[0022] Please see Figures 1 to 2This utility model provides a technical solution: a chain adjustment device, including two side plates 1, which are respectively fixedly connected to the two sides of the surface of a base 2. A shaft groove 5 is formed on the surface of the side plate 1, and a wheel axle 4 is slidably connected to the surface of the shaft groove 5. A sprocket 3 is rotatably connected to the surface of the wheel axle 4. A toothed plate 9 is fixedly connected to the upper end surface of the shaft groove 5, and insert blocks 11 are slidably connected to the two sides of the toothed plate 9. The insert blocks 11 are inserted into the surface of the side plate 1 to brake the toothed plate 9. A gear 7 is inserted into the surface of the wheel axle 4, and the surface of the wheel axle 4 rotates... The device is equipped with a handle 8, which has a through hole 18 and a handle groove 19 on its surface. The handle 8 presses against the surface of the handle groove 19 to limit the movement of the gear 7. The movable tooth plate 9 and the gear 7 are provided to enable the movement of the wheel shaft 4 and the sprocket 3, thereby achieving the adjustment of the chain tension. The operation is simple, improving the adjustment efficiency and the stability of the wheel shaft 4. Furthermore, the handle 8 and the through hole 18 can not only clamp and fix the gear 7, but also enable the quick disassembly and installation of the gear 7 and the wheel shaft 4, reducing the maintenance and replacement costs of the adjustment device.

[0023] Example 2

[0024] Please see Figure 3 Based on Embodiment 1, in order to limit and brake the toothed plate 9, the shaft groove 5 is a "T"-shaped groove with slots 14 on both sides of the shaft groove 5. Multiple lower tooth grooves are formed on the lower surface of the shaft groove 5, and the multiple lower tooth grooves are arranged in an array. A rubber block 6 is fixedly connected to the upper surface of the shaft groove 5. The other end of the rubber block 6 is fixedly connected to the surface of the toothed plate 9. The toothed plate 9 has a square plate structure. Multiple upper tooth grooves are formed on the lower surface of the toothed plate 9, and the upper tooth grooves are arranged in an array and correspond to and match the lower tooth grooves on the surface of the shaft groove 5. Sliding grooves 10 are formed on both sides of the toothed plate 9. The sliding grooves 10 are square grooves. Grooves are formed on both sides of the sliding grooves 10. A rubber strip 12 is fixedly connected to one end of the groove. A slider 13 is fixedly connected to the other end of the rubber strip 12. One side of the slider 13 is fixedly connected to the surface of the insert block 11. The insert block 11 has an "L"-shaped plate structure. One end of the insert block 11 is inserted into the surface of the slot 14.

[0025] When the insert 11 on the surface of the toothed plate 9 is inserted into the slot 14, the toothed plate 9 is fixed. At this time, the rubber block 6 is in a stretched state. The upper tooth groove on the surface of the toothed plate 9 and the lower tooth groove on the surface of the shaft groove 5 limit and engage the gear 7, thus limiting the gear 7. The insert 11 is set in an "L" shape, which makes it convenient to move the insert 11 by hand.

[0026] Example 3

[0027] Please see Figures 4 to 5Based on Embodiment 2, in order to disassemble and install the gear 7, the axle 4 has a cylindrical rod structure. Annular grooves are formed on both sides of the axle 4 surface. The gear 7 is inserted into the surface of the annular grooves. Rotary grooves 15 are formed on both ends of the axle 4. The rotary grooves 15 are annular grooves with a "T"-shaped cross-section. A rotating plate 17 is rotatably connected to the surface of the rotary grooves 15. The rotating plate 17 has a circular plate structure. A rubber pad 16 is fixedly connected to one end of the rotating plate 17. The other end of the rubber pad 16 is fixedly connected to the surface of the handle 8. The handle 8 has a square plate structure. Limiting grooves 20 are formed on both ends of the axle 4. The limiting grooves 20 are square grooves and communicate with the handle groove 19. The handle 8 is snapped onto the surfaces of the handle groove 19 and the limiting groove 20. The handle groove 19 is perpendicular to the through hole 18.

[0028] When the handle 8 is limited in the limiting groove 20 and the handle groove 19, the handle 8 can fix the gear 7 in the axle 4, and when the gear 7 rotates, it can also act as a force application point. The rubber pad 16 is set to pull the handle 8 to prevent the handle 8 from shifting and becoming loose. When it is necessary to disassemble the gear 7, pull and rotate the handle 8. At this time, the rubber pad 16 is in a stretched state, and the handle 8 can be passed through the through hole 18.

[0029] In actual use, first, manually move the insert block 11 to separate it from the slot 14. The rubber block 6 returns to its original state after being stretched, causing the toothed plate 9 to move upward. The insert block 11 is squeezed by the shaft groove 5, and the rubber strip 12 is in a compressed state. Then, the handle 8 is engaged in the handle groove 19 and the limiting groove 20. Rotate the handle 8, and the handle 8 drives the gear 7 to rotate in the lower tooth groove. The gear 7 drives the wheel shaft 4 to rotate. When the sprocket 3 fixed on the surface of the wheel shaft 4 is adjusted to a suitable distance, manually pull the toothed plate 9 downward. When the slide groove 10 is parallel and connected to the slot 14, the rubber strip 12 returns to its original state from the compressed state, causing the insert block 11 to spring into the slot 14. The toothed plate 9 is fixed. The upper tooth groove on the surface of the toothed plate 9 and the lower tooth groove of the shaft groove 5 clamp and fix the gear 7 respectively. When it is necessary to inspect or replace the gear 7 and the sprocket 3, manually turn the handle 8 and rotate it to push the handle 8 out of the through hole 18.

[0030] 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 chain adjusting device, comprising two side plates (1) fixedly connected on both sides of the surface of a base (2) respectively, the surface of the side plate (1) is provided with an axle slot (5), characterized in that: The surface of the shaft slot (5) is slidably connected with an axle (4), the surface of the axle (4) is rotatably connected with a sprocket (3), the upper end surface of the shaft slot (5) is fixedly connected with a toothed plate (9), the two side surfaces of the toothed plate (9) are slidably connected with an insertion block (11), the insertion block (11) is inserted into the surface of the side plate (1), the toothed plate (9) is braked, the surface of the axle (4) is inserted with a gear (7), the surface of the axle (4) is rotatably connected with a handle (8), the surface of the handle (8) is provided with a through hole (18) and a handle slot (19), the handle (8) is pressed on the surface of the handle slot (19), and the gear (7) is limited.

2. A chain tensioner as defined in claim 1, wherein: The shaft slot (5) is a "T" shaped slot, the two side surfaces of the shaft slot (5) are provided with an insertion slot (14), the lower end surface of the shaft slot (5) is provided with a plurality of lower tooth grooves, the plurality of lower tooth grooves are arrayed, the upper end surface of the shaft slot (5) is fixedly connected with a rubber block (6), and the other end of the rubber block (6) is fixedly connected to the surface of the toothed plate (9).

3. A chain tensioner as defined in claim 1, wherein: The toothed plate (9) is a square plate structure, a plurality of upper tooth grooves are formed in the lower end surface of the toothed plate (9), the upper tooth grooves are arrayed and correspondingly matched with the lower tooth grooves on the surface of the shaft slot (5), and the two side surfaces of the toothed plate (9) are provided with a sliding groove (10), which is a square groove.

4. A chain tensioner as defined in claim 3, wherein: The two side surfaces of the sliding groove (10) are provided with a groove, one end of the groove is fixedly connected with a rubber strip (12), the other end of the rubber strip (12) is fixedly connected with a sliding block (13), one side of the sliding block (13) is fixedly connected to the surface of the insertion block (11), the insertion block (11) is an "L" shaped plate structure, and one end of the insertion block (11) is inserted into the surface of the insertion slot (14).

5. A chain tensioner as defined in claim 1, wherein: The wheel shaft (4) is a circular rod structure, the two sides of the surface of the wheel shaft (4) are provided with an annular groove, the gear (7) is inserted into the surface of the annular groove, the two end surfaces of the wheel shaft (4) are provided with a rotating groove (15), the rotating groove (15) is a "T" shaped annular groove, the surface of the rotating groove (15) is rotatably connected with a rotating plate (17), the rotating plate (17) is a circular plate structure, one end of the rotating plate (17) is fixedly connected with a rubber pad (16), the other end of the rubber pad (16) is fixedly connected to the surface of the handle (8), and the handle (8) is a square plate structure.

6. A chain tensioner as defined in claim 1, wherein: The two end surfaces of the wheel shaft (4) are provided with a limiting groove (20), the limiting groove (20) is a square groove, the limiting groove (20) is through the handle slot (19), the handle (8) is clamped on the surfaces of the handle slot (19) and the limiting groove (20), and the handle slot (19) is vertically distributed with the through hole (18).

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