Chain tensioning device

Abstract

The utility model belongs to the technical field of chain transmission, and discloses a chain tensioning device which comprises a tensioning seat and a tensioning component, the tensioning component is detachably installed on the tensioning seat, the tensioning seat comprises an adjusting bolt, the tensioning component comprises a tensioning wheel and a tensioning shaft, the tensioning wheel is arranged on the tensioning shaft in a sleeved mode, and the adjusting bolt is arranged on the tensioning wheel. And the adjusting bolt is connected with the tensioning shaft. By arranging the adjusting bolt, the tensioning shaft and the tensioning wheel, the tensioning shaft is driven by the adjusting bolt to move up and down, so that the tensioning wheel is driven to move up and down, the wrap angle of the tensioning wheel meshed with the chain is adjusted along with the tightness of the chain, the purpose of tensioning the chain is achieved, the structure is simple, operation is convenient, and practicability is high. And the production efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to chain drive technical field, in particular to a chain tensioning device. BACKGROUND

[0002] Many transport tools adopt chain drive, after a period of transportation, the chain becomes slack under high load operation, the slack chain has large shaking amplitude, which reduces the efficiency of the whole equipment.

[0003] The existing technology is to control the tensioning degree by adjusting the center distance, which may cause the risk of falling and even blocking of the transported objects, and some need to cut one or two chain links after the chain wears to restore the chain tensioning, which needs manual adjustment and is troublesome, and causes waste of time and materials. UTILITY MODEL CONTENTS

[0004] In view of the above problems, the utility model provides a chain tensioning device, which comprises a tensioning seat and a tensioning component, the tensioning component is detachably installed on the tensioning seat, the tensioning seat comprises an adjusting bolt, the tensioning component comprises a tensioning wheel and a tensioning shaft, the tensioning wheel is sleeved on the tensioning shaft, and the adjusting bolt is connected with the tensioning shaft.

[0005] Further, the tensioning seat further comprises a seat body, a first threaded hole is arranged on the top wall of the seat body, and the adjusting bolt is matched with the first threaded hole.

[0006] Further, the tensioning shaft comprises a shaft and a shaft cap, the shaft cap is arranged at the end of the shaft, a second threaded hole is arranged on the shaft cap, and the adjusting bolt is matched with the second threaded hole.

[0007] Further, a sliding hole is arranged on the seat body, the sliding hole is arranged on the side surface of the seat body close to the tensioning wheel, the width of the sliding hole is greater than the diameter of the shaft, and the width of the sliding hole is less than the diameter of the shaft cap.

[0008] Further, an installation hole is arranged on the seat body, the installation hole is arranged above the sliding hole, the installation hole is communicated with the sliding hole, and the diameter of the installation hole is greater than the diameter of the shaft cap.

[0009] Further, the tensioning component further comprises a deep groove ball bearing, and the deep groove ball bearing is arranged between the tensioning shaft and the tensioning wheel.

[0010] Further, the tensioning component further comprises a tensioning wheel inter-tube, a flat washer, a standard elastic washer and a nut which are sequentially arranged on the shaft, the tensioning wheel inter-tube is arranged at one end close to the shaft cap, the deep groove ball bearing is arranged between the tensioning wheel inter-tube and the tensioning wheel, and the side wall of the seat body close to the tensioning wheel is clamped between the tensioning wheel inter-tube and the shaft cap.

[0011] Further, the tensioning component further comprises elastic retaining rings for holes, and the two elastic retaining rings for holes are arranged on the two sides of the deep groove ball bearing respectively.

[0012] Further, the tensioning wheel comprises a nylon tensioning wheel.

[0013] Further, the inter-tensioning wheel pipe comprises a nylon inter-tensioning wheel pipe.

[0014] Compared with the prior art, the application has the beneficial effects that:

[0015] 1、The adjusting bolt, the tensioning shaft and the tensioning wheel are arranged, the tensioning shaft is driven to move up and down through the adjusting bolt, the tensioning wheel is driven to move up and down, the included angle of the meshing of the tensioning wheel and the chain is adjusted according to the tightness of the chain, the purpose of chain tensioning is achieved, the structure is simple, the operation is convenient, and the production efficiency is greatly improved.

[0016] 2、The nylon tensioning wheel is adopted, and the nylon tensioning wheel has the characteristics of good wear resistance, corrosion resistance, small noise, low price, good adaptability and applicability to various environments.

[0017] Other features and advantages of the present application will be described in the following description, and some of them will become apparent from the description, or will be understood by those skilled in the art, or will be understood by implementing the present application. The purpose and other advantages of the present application can be achieved and obtained by the structure indicated in the description, claims and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0019] Figure 1 A sectional view of the tensioning device in the embodiment of the present application is shown;

[0020] Figure 2 A schematic view of the tensioning seat in the embodiment of the present application is shown;

[0021] Figure 3 A sectional view of the tensioning component in the embodiment of the present application is shown;

[0022] Figure 4 A working schematic view of the tensioning device in the embodiment of the present application is shown.

[0023] In the diagram, 1. Tensioning seat; 11. Seat body; 12. Adjusting bolt; 13. First threaded hole; 14. Sliding hole; 15. Mounting hole; 2. Tensioning component; 21. Tensioning shaft; 211. Shaft; 212. Shaft cap; 213. Second threaded hole; 22. Tensioning wheel; 23. Deep groove ball bearing; 24. Tensioning wheel tube; 25. Flat washer; 26. Standard elastic washer; 27. Nut; 28. Hole elastic retaining ring. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] like Figure 1 As shown, a chain tensioning device includes a tensioning seat 1 and a tensioning component 2. The tensioning component 2 is detachably mounted on the tensioning seat 1. The tensioning seat 1 includes an adjusting bolt 12. The tensioning component 2 includes a tensioning wheel 22 and a tensioning shaft 21. The tensioning wheel 22 is sleeved on the tensioning shaft 21. The adjusting bolt 12 is connected to the tensioning shaft 21.

[0026] like Figure 2 As shown, the tensioning seat 1 also includes a seat body 11, the top wall of which is provided with a first threaded hole 13, and the adjusting bolt 12 cooperates with the first threaded hole 13.

[0027] The tensioning seat 1 is located near the slack side of the chain. The seat body 11 is rectangular and hollow inside. A first threaded hole 13 is provided at the top. The adjusting bolt 12 is screwed in and out of the first threaded hole 13. The bottom position of the adjusting bolt 12 moves up and down relative to the seat body 11.

[0028] The tensioning shaft 21 includes a shaft 211 and a shaft cap 212. The shaft cap 212 is disposed at the end of the shaft 211. The shaft cap 212 is provided with a second threaded hole 213. The adjusting bolt 12 is engaged with the second threaded hole 213.

[0029] The adjusting bolt 12 is screwed into or out of the first threaded hole 13 to drive the tensioning shaft 21 to move up and down along the adjusting bolt 12, so that the tensioning wheel 22 mounted on the tensioning shaft 21 also moves up and down, and the wrap angle of the chain engaged with the tensioning wheel 22 is adjusted according to the tightness of the chain. When the chain is loose with a small amplitude, the adjusting bolt 12 only needs to be screwed into a small depth, and when the chain is loose with a large amplitude, the adjusting bolt 12 needs to be screwed into a large depth, so as to achieve the purpose of tensioning the chain by the tensioning wheel 22, and the structure is simple, the operation is convenient, and the production efficiency is greatly improved.

[0030] The seat body 11 is provided with a sliding hole 14, which is arranged on the side surface of the seat body 11 close to the tensioning wheel 22, and the diameter of the sliding hole 14 is greater than the diameter of the shaft 211, and the width of the sliding hole 14 is less than the diameter of the shaft cap 212.

[0031] The sliding hole 14 is in a long strip shape, and when the adjusting bolt 12 is screwed in or out, the shaft 211 of the tensioning shaft 21 moves up and down in the sliding hole 14, thereby driving the tensioning wheel 22 to move up and down to tension the chain. In order to enable the shaft 211 of the tensioning shaft 21 to move freely in the sliding hole 14 without generating friction, the width of the sliding hole 14 is greater than the diameter of the shaft 211, but in order to prevent the tensioning shaft 21 from being separated from the sliding hole 14, the width of the sliding hole 14 is less than the diameter of the shaft cap 212, and the shaft cap 212 plays a role of fixing and limiting.

[0032] The seat body 11 is provided with a mounting hole 15, which is arranged above the sliding hole 14 and communicates with the sliding hole 14, and the diameter of the mounting hole 15 is greater than the diameter of the shaft cap 212.

[0033] There are two ways to install the tensioning component 2 on the seat body 11. One is to first pass the shaft 211 through the sliding hole 14, then install the tensioning wheel 22, and then connect the adjusting bolt 12 with the shaft cap 212 on the tensioning shaft 21. This installation method needs to be installed on the seat body 11, which limits the installation space and reduces the work efficiency.

[0034] There is another installation method in the application, which is convenient and fast. The tensioning wheel 22 is first installed on the tensioning shaft 21, and then the entire tensioning component 2 is installed on the tensioning seat 1. Specifically, the shaft cap 212 is passed through the mounting hole 15, then the adjusting bolt 12 is connected with the second threaded hole 213 on the shaft cap 212, and then the adjusting bolt 12 is screwed in. At this time, the side surface of the seat body 11 close to the tensioning wheel 22 is just clamped between the shaft cap 212 and the tensioning wheel tube 24, realizing the process of installing the tensioning component 2 on the tensioning seat 1, which is simple and efficient.

[0035] As Figure 3As shown, the tensioning component 2 further comprises a deep groove ball bearing 23, which is arranged between the tensioning shaft 21 and the tensioning wheel 22.

[0036] The deep groove ball bearing 23 is arranged between the shaft 211 and the tensioning wheel 22, so that the tensioning wheel 22 has small friction when rotating, and the work of the driving wheel and the driven wheel is reduced as much as possible.

[0037] The tensioning component 2 further comprises a tensioning wheel interval pipe 24, a flat washer 25, a standard elastic washer 26 and a nut 27 arranged in sequence on the shaft 211. The tensioning wheel interval pipe 24 is arranged at one end close to the shaft cap 212. The deep groove ball bearing 23 is arranged between the tensioning wheel interval pipe 24 and the tensioning wheel 22. The side wall of the seat body 11 close to the tensioning wheel 22 is clamped between the tensioning wheel interval pipe 24 and the shaft cap 212.

[0038] The tensioning wheel interval pipe 24 is stepped. One end of the deep groove ball bearing 23 is clamped at the step of the tensioning wheel interval pipe 24. The step limits one end of the deep groove ball bearing 23. The other end of the deep groove ball bearing 23 is arranged in sequence with the flat washer 25, the standard elastic washer 26 and the nut 27, which fasten and limit the other end of the deep groove ball bearing 23. Therefore, the deep groove ball bearing 23 is limited on the shaft 211 and is not easy to shake.

[0039] The tensioning component 2 further comprises two hole elastic retaining rings 28 arranged on both sides of the deep groove ball bearing 23.

[0040] The tensioning wheel 22 comprises a nylon tensioning wheel. The nylon tensioning wheel has good wear resistance, corrosion resistance, small noise, low price, good adaptability and can be applied to various environments.

[0041] The tensioning wheel interval pipe 24 comprises a nylon tensioning wheel interval pipe. The nylon tensioning wheel interval pipe has good wear resistance, corrosion resistance, small noise, low price, good adaptability and can be applied to various environments.

[0042] The specific working principle is as follows: Figure 4As shown, when the transmission chain between the driving wheel and the driven wheel is loose, first set the tensioning seat 1 on the loose side of the chain, the tensioning seat 1 is arranged close to the driving wheel, then set the tensioning wheel 22, the pipe, the flat washer 25, the standard elastic washer 26, the nut 27 on the tensioning shaft 21 in sequence, then set the deep groove ball bearing 23 on the shaft 211, then set the tensioning wheel 22 on the deep groove ball bearing 23, the shaft cap 212 is clamped on the seat body 11 through the mounting hole 15 and the shaft 211, and is slid downward along the sliding hole 14, and is slid to the position where the tensioning wheel 22 is just engaged with the chain on the loose side, then screw the adjusting bolt 12 into the first threaded hole 13, and continue to screw the adjusting bolt 12 into the second threaded hole 213 until the top nut of the adjusting bolt 12 is in contact with the seat body 11, so as to fix the position of the tensioning shaft 21, so that the tensioning wheel 22 can be engaged with the chain on the loose side, when the chain is loose more than before after being used for a period of time, the adjusting bolt 12 is unscrewed from the second threaded hole 213 of the shaft cap 212, the tensioning shaft 21 is continuously moved downward along the sliding hole 14 until the tensioning wheel 22 is just engaged with the chain on the loose side, then the adjusting bolt 12 is screwed into the second threaded hole 213 again until the top nut of the adjusting bolt 12 is in contact with the seat body 11, so as to fix the position of the tensioning shaft 21, so that the tensioning wheel 22 can be engaged with the chain on the loose side, thereby achieving the purpose of tensioning the chain.

[0043] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: still can modify the technical scheme recorded in foregoing each embodiment, or equivalent replacement to part technical features in it, and these modifications or replacements, do not make the essence of corresponding technical scheme deviate from the spirit and scope of the utility model each embodiment technical scheme.

Claims

1. A chain tensioner characterized by: The tensioner comprises a tensioner seat (1) and a tensioner component (2) detachably mounted on the tensioner seat (1), the tensioner seat (1) comprises an adjusting bolt (12), the tensioner component (2) comprises a tensioner wheel (22) and a tensioner shaft (21), the tensioner wheel (22) is sleeved on the tensioner shaft (21), the adjusting bolt (12) is connected with the tensioner shaft (21), the tensioner seat (1) further comprises a seat body (11), a first threaded hole (13) is arranged on the top wall of the seat body (11), the adjusting bolt (12) cooperates with the first threaded hole (13), the tensioner shaft (21) comprises a shaft (211) and a shaft cap (212), the shaft cap (212) is arranged on the end of the shaft (211), a second threaded hole (213) is arranged on the shaft cap (212), and the adjusting bolt (12) cooperates with the second threaded hole (213).

2. Chain tensioner according to claim 1, characterized in that A sliding hole (14) is arranged on the seat body (11), the sliding hole (14) is arranged on the side of the seat body (11) close to the tensioner wheel (22), the width of the sliding hole (14) is greater than the diameter of the shaft (211), and the width of the sliding hole (14) is less than the diameter of the shaft cap (212).

3. A chain tensioner as claimed in claim 2, characterised in that: An installation hole (15) is arranged on the seat body (11), the installation hole (15) is arranged above the sliding hole (14), the installation hole (15) communicates with the sliding hole (14), and the diameter of the installation hole (15) is greater than the diameter of the shaft cap (212).

4. The chain tensioner of claim 1, wherein: The tensioner component (2) further comprises a deep groove ball bearing (23), and the deep groove ball bearing (23) is arranged between the tensioner shaft (21) and the tensioner wheel (22).

5. A chain tensioner as claimed in claim 4, characterised in that: The tensioner component (2) further comprises a tensioner wheel inter-tube (24), a flat washer (25), a standard elastic washer (26) and a nut (27) arranged on the shaft (211) in sequence, the tensioner wheel inter-tube (24) is arranged at one end close to the shaft cap (212), the deep groove ball bearing (23) is arranged between the tensioner wheel inter-tube (24) and the tensioner wheel (22), and the side wall of the seat body (11) close to the tensioner wheel (22) is clamped between the tensioner wheel inter-tube (24) and the shaft cap (212).

6. A chain tensioner as claimed in claim 5, characterised in that: The tensioner component (2) further comprises hole elastic retaining rings (28), and two hole elastic retaining rings (28) are arranged on the two sides of the deep groove ball bearing (23) respectively.

7. The chain tensioner of claim 1, wherein: The tensioner wheel (22) comprises a nylon tensioner wheel.

8. The chain tensioner of claim 5, wherein: The tensioner wheel inter-tube (24) comprises a nylon tensioner wheel inter-tube.

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