Elastic force protection tensioning mechanism of bone sawing machine

Abstract

The utility model relates to the technical field of food machinery, in particular to an elastic force protection tensioning mechanism of a bone sawing machine, which comprises an adjusting screw rod, an elastic force protection device, a tensioning device and an elastic force protection device, the middle position of the adjusting screw rod is provided with a square boss, and one side of the square boss is provided with a shaft shoulder; the upper clutch sleeves the adjusting screw rod, and one end of the upper clutch is provided with a blind hole; the lower clutch is sleeved on the adjusting screw rod, is opposite to the upper clutch, and is sleeved on the square boss and the shaft shoulder of the adjusting screw rod; the outer circle of the rotating sleeve is in a step shape, and a through hole is formed in the step end face. A stepped hole is formed in the rotating sleeve, and the rotating sleeve is sleeved on the excircles of the upper clutch and the lower clutch; a blind hole is formed in one end of the adjusting handle, and the adjusting handle sleeves the outer circle of the rotating sleeve; the connecting pin shaft is fixed in the blind hole of the upper clutch end face, and the connecting pin shaft is sleeved with the through hole of the stepped end face of the rotating sleeve; the upper spring is sleeved on the outer circle with the smallest outer diameter of the rotating sleeve; and the lower spring is sleeved on the adjusting screw rod, and one end of the lower spring is contacted with the shaft shoulder of the adjusting screw rod. The saw blade solves the problem that in the prior art, pulling force borne by the saw blade is not uniform.

Description

Technical Field

[0001] The utility model relates to the technical field of food machinery, in particular to an elastic protection tensioning mechanism of a bone sawing machine. Background Art

[0002] The common bone saws on the market often use direct thread tensioning when tensioning the saw blade. However, this tensioning method has a problem, that is, the tension on the saw blade is different each time it is tensioned, which can easily cause the band saw to fall off or break during use, thereby shortening its service life and even causing accidental injuries. Utility Model Content

[0003] The utility model aims to overcome the shortcomings of the prior art and proposes to design an elastic protection tensioning mechanism for a bone sawing machine to solve the problem of different pulling forces on saw blades in the prior art.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] An elastic protection tensioning mechanism for a bone sawing machine, comprising:

[0006] The adjusting screw rod has threads at both ends, a square boss in the middle, and a shaft shoulder on one side of the square boss;

[0007] The upper clutch is sleeved on the adjusting screw and has a blind hole at one end;

[0008] The lower clutch is sleeved on the adjusting screw and is located below the upper clutch. The lower clutch is opposite to the upper clutch and sleeved on the square boss and the shoulder of the adjusting screw.

[0009] The outer circle of the rotating sleeve is stepped, and a through hole is arranged on the end surface of the step; a stepped hole is arranged inside the rotating sleeve, and the hole with a large central inner diameter is sleeved on the outer circle of the upper clutch and the lower clutch, and the hole with a small central inner diameter is sleeved on the adjusting screw;

[0010] The adjustment handle has a blind hole at one end, is sleeved on the outer circle of the rotating sleeve, and is relatively fixed to the rotating sleeve;

[0011] The connecting pin is fixed in the blind hole of the upper clutch end face; the through hole of the stepped end face of the rotating sleeve is sleeved on the connecting pin;

[0012] The upper spring is mounted on the outer circle with the smallest outer diameter of the rotating sleeve;

[0013] The spring stopper I is sleeved on the adjusting screw on the side where the upper spring is installed;

[0014] The lower spring is sleeved on the adjusting screw, and one end of the lower spring contacts the shoulder of the adjusting screw;

[0015] The spring stopper II is sleeved on the adjusting screw on the side where the lower spring is installed, and one end surface is in contact with the lower spring.

[0016] In the above technical solution, the adjusting screw is used to tension the saw blade. When the tension of the saw blade is greater than the pressure applied by the two springs to the upper clutch and the lower clutch, the contact part of the upper clutch and the lower clutch will slide, causing the upper clutch and the lower clutch to disengage. When force is applied again, the upper and lower clutches continue to rotate, and the fan-shaped boss falls back to the groove between the two bosses, thereby protecting the saw blade from being subjected to a large tension. Even if the length of the saw blade changes after a period of use, the saw blade will be subjected to the same tension when tensioned, avoiding the problem of different tensions on the saw blade.

[0017] Furthermore, a fan-shaped boss is provided at the other end of the upper clutch, a round hole is provided at the center, and the round hole of the upper clutch is sleeved on the adjusting screw.

[0018] Furthermore, the lower clutch is provided with a fan-shaped boss at one end, a round hole at the other end, and a square hole in the center; the lower clutch is sleeved on the adjusting screw and is located below the upper clutch, the side of the lower clutch with the fan-shaped boss is opposite to the side of the upper clutch with the fan-shaped boss, the square hole of the lower clutch is clamped on the square boss of the adjusting screw, and the round hole of the lower clutch is sleeved on the shoulder of the adjusting screw.

[0019] Furthermore, a pressure-adjusting nut is provided on the adjusting screw, and the pressure-adjusting nut is located above the spring stop washer I and contacts the end surface of the spring stop washer I.

[0020] Furthermore, a screw hole is provided on the outer circle of the blind hole of the adjustment handle and a screw is connected in the screw hole, and the adjustment handle can be fixed by tightening the screw.

[0021] Furthermore, a protective sleeve is sleeved on the outer circle of the lower spring.

[0022] Furthermore, the tensioning mechanism is mounted on a frame, a slider is mounted on the frame, a threaded hole is provided on one side of the slider, and a slot is provided on the other side; one end of the adjusting screw equipped with a lower spring penetrates from the top of the frame, and extends downward to be connected with the threaded hole of the slider; a passive wheel is mounted in the slot, and a saw blade is sleeved on the outer circle of the passive wheel. The adjusting handle is rotated, and the adjusting handle transmits power to the upper clutch through the screw, the rotating sleeve, and the connecting pin shaft, and the upper clutch transmits power to the lower clutch through the fan-shaped boss, and the lower clutch transmits power to the adjusting screw through its square through hole, and the adjusting screw rotates, pulling the slider to move upward, and the slider drives the passive wheel to move, completing the tensioning of the saw blade.

[0023] Technical effects of the utility model:

[0024] Compared with the prior art, the elastic force protection tensioning mechanism of the bone sawing machine of the utility model uses an adjusting screw to adjust the tension of the saw blade. When the tension of the saw blade is greater than the pressure applied by the two springs to the upper clutch and the lower clutch, the contact part of the upper clutch and the lower clutch slides, so that the upper clutch and the lower clutch are disengaged. Subsequently, if pressure is applied again, the upper clutch and the lower clutch will be engaged again, which helps to prevent the saw blade from being subjected to excessive tension. At the same time, during use, the length of the saw blade may change, but when tensioned, it will still be subjected to equal tension, thereby avoiding the situation where the tension on the saw blade is inconsistent. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structural principle of the elastic protection tensioning mechanism of the bone sawing machine of the utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the adjusting screw of the utility model;

[0027] Figure 3 This is a schematic diagram of the rotating sleeve structure of the utility model;

[0028] Figure 4 This is a schematic diagram of the upper clutch structure of the utility model;

[0029] Figure 5 This is a schematic diagram of the lower clutch structure of the utility model;

[0030] Figure 6 This is a schematic diagram of the structure of the slider of the utility model;

[0031] Figure 7 This is a schematic diagram of the frame structure of the utility model;

[0032] Figure 8 This is a schematic diagram of the passive wheel structure of the utility model;

[0033] Fig. 9 This is a schematic diagram of the installation structure of the utility model.

[0034] In the figure, 1. adjustment handle; 2. spring stopper I; 3. upper spring; 4. connecting pin; 5. swivel sleeve; 6. screw; 7. upper clutch; 8. lower clutch; 9. lower spring; 10. adjustment screw; 11. protective cover; 12. spring stopper II; 13. pressure-adjusting nut; 14. square boss; 15. shoulder; 16. frame; 17. slider; 18. passive wheel; 19. saw blade; 20. mounting plate; 21. clamping column; 161. long waist groove; 162. through hole; 171. threaded hole; 172. boss; 173. clamping slot. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model is clearly and completely described below in conjunction with the accompanying drawings of the specification.

[0036] Embodiment 1:

[0037] like Figure 1-9 As shown, the elastic protection tensioning mechanism of a bone sawing machine involved in this embodiment includes an adjustment handle 1, a spring stop washer I2, an upper spring 3, a connecting pin 4, a rotating sleeve 5, a screw 6, an upper clutch 7, a lower clutch 8, a lower spring 9, an adjustment screw 10, a protective sleeve 11, a spring stop washer II12, a pressure regulating nut 13, a frame 16, a slider 17, a passive wheel 18 and a saw blade 19.

[0038] The outer circle of the rotating sleeve 5 is stepped, with a stepped hole inside and a through hole on the end face of the step. The upper clutch 7 is provided with a blind hole at one end, a fan-shaped boss at the other end, and a round hole at the center. The lower clutch 8 is provided with a fan-shaped boss at one end, a round hole at the other end, and a square hole at the center. The adjustment handle 1 is provided with a blind hole at one end, and a screw hole is provided on the outer circle of the blind hole. The adjustment screw 10 is provided with threads at both ends, a square boss 14 is provided in the middle, and a shoulder 15 is provided on one side of the square boss 14. The lower clutch 8 is sleeved on the adjustment screw 10 from the side close to the square boss 14, the square hole of the lower clutch 8 is stuck on the square boss 14 of the adjustment screw 10, and the round hole of the lower clutch 8 is sleeved on the shoulder 15 of the adjustment screw 10; the side of the upper clutch 7 with the fan-shaped boss is opposite to the side of the lower clutch 8 with the fan-shaped boss, and the fan-shaped bosses of the upper clutch 7 and the lower clutch 8 are in contact. The connecting pin 4 is fixed in the blind hole of the end face of the upper clutch 7; the rotating sleeve 5 is sleeved on the adjusting screw 10 from the end where the upper clutch 7 and the lower clutch 8 are installed, and the hole with a large central inner diameter is sleeved on the outer circle of the upper clutch 7 and the lower clutch 8; the through hole of the stepped end face of the rotating sleeve 5 is sleeved on the connecting pin 4. The upper spring 3 is sleeved on the outer circle with the smallest outer diameter of the rotating sleeve 5, the spring stopper I2 is sleeved on the adjusting screw 10 on the side where the upper spring 3 is installed, and the pressure regulating nut 13 is fixed on the thread at the end of the adjusting screw 10 and contacts the spring stopper I2.

[0039] The adjusting handle 1 is installed from the side where the pressure regulating nut 13 is installed, and is sleeved on the outer circle of the rotating sleeve 5. The screw 6 is fixed in the screw hole of the outer circle of the adjusting handle 1. The adjusting handle 1 is fixed by tightening the screw 6.

[0040] The lower spring 9 is installed from the other end of the adjusting screw 10 and sleeved on the adjusting screw 10, and one end of the lower spring 9 contacts the shoulder 15 of the adjusting screw 10. The protective sleeve 11 sleeves on the outer circle of the lower spring 9; the spring stopper II12 sleeves on the side of the adjusting screw 10 with the lower spring 9, with one end surface contacting the frame 16 and the other end surface contacting the lower spring 9.

[0041] The side of the frame 16 is provided with a long waist groove 161, and the top of the frame 16 is provided with a through hole 162. The slider 17 is provided with a threaded hole 171 at one end and a boss 172 at the other end. The boss 172 is provided with a slot 173. The end of the slider 17 with the boss 172 is placed in the long waist groove 161 of the frame 16, and the threaded hole 171 on the slider 17 is aligned with the through hole 162 at the top of the frame 16. The end of the tensioning mechanism equipped with the lower spring 9 is inserted from the through hole 162 at the top of the frame 16 and screwed into the threaded hole 171 on the slider 17. The passive wheel 18 is provided with a mounting plate 20 at one end, and the two ends of the mounting plate 20 are provided with a clamping column 21, and the clamping column 21 is clamped in the slot 173 of the slider 17. The saw blade 19 is wound around the outer circle of the passive wheel 18.

[0042] Working principle: When the saw blade 19 needs to be tightened, the adjustment handle 1 is rotated, and the adjustment handle 1 transmits power to the rotating sleeve 5 through the screw 6. The rotating sleeve 5 transmits power to the upper clutch 7 through the connecting pin 4. Due to the elastic force of the upper spring 3 and the lower spring 9, pressure is applied to the upper clutch 7 and the lower clutch 8 respectively, so that the upper clutch and the lower clutch are meshed. The upper clutch 7 transmits power to the lower clutch 8 through the fan-shaped boss. (As shown in FIG. Figure 1 ) The lower clutch 8 transmits power to the adjustment screw 10 through its square through hole. The adjustment screw 10 rotates, pulling the slider 17 upward, and the slider 17 drives the passive wheel 18 upward, so that the saw blade is tightened, and the saw blade 19 is tensioned. When the pulling force of the saw blade 19 is greater than the pressure applied by the two springs to the upper clutch 7 and the lower clutch 8, the friction force generated by the meshing of the upper clutch 7 and the lower clutch 8 cannot drive the adjustment screw 10 to rotate, and the tensioning continues. The fan-shaped bosses at the meshing part of the upper clutch 7 and the lower clutch 8 are forced to disengage. When the meshing parts of the upper and lower clutches are completely disengaged, the fan-shaped bosses of the upper clutch 7 and the lower clutch 8 fall back into the groove between the bosses under the elastic force of the upper spring 3 and the lower spring 9. The friction force generated by the meshing of the upper clutch 7 and the lower clutch 8 cannot drive the adjustment screw 10 to continue to rotate, and cannot drive the slider 17 to move, thereby unable to drive the passive wheel 18 to move, and cannot continue to tension the saw blade 19, thereby protecting the saw blade 19 from being subjected to a large pulling force. Even if the length of the saw blade 19 changes after a period of use, the saw blade 19 will be subjected to the same tension when being tensioned. The protective cover 11 wraps the lower spring 9 inside to prevent foreign matter from entering and affecting the spring elasticity or causing contamination. By adjusting the pressure of the pressure regulating nut 13 on the upper spring 3, the protective tension of the tensioning mechanism can be adjusted.

[0043] The above-mentioned specific implementation methods are only specific cases of the present utility model. The patent protection scope of the present utility model includes but is not limited to the above-mentioned specific implementation methods. Any appropriate changes or modifications made to them by ordinary technicians in the relevant technical field in accordance with the claims of the present utility model shall fall within the patent protection scope of the present utility model.

Claims

1. A bone sawing machine elastic protection tensioning mechanism, characterized in that: include: The adjusting screw rod (10) is provided with threads at both ends, a square boss (14) is provided in the middle, and a shaft shoulder (15) is provided on one side of the square boss (14); The upper clutch (7) is sleeved on the adjusting screw (10) and has a blind hole at one end; The lower clutch (8) is sleeved on the adjusting screw (10) and is located below the upper clutch (7). The lower clutch (8) is opposite to the upper clutch (7). The lower clutch (8) is sleeved on the square boss (14) and the shaft shoulder (15) of the adjusting screw. The rotating sleeve (5) has a stepped outer circumference and a through hole on the stepped end surface; the rotating sleeve (5) has a stepped hole inside, the hole with a large central inner diameter is sleeved on the outer circumference of the upper clutch (7) and the lower clutch (8), and the hole with a small central inner diameter is sleeved on the adjusting screw (10); The adjusting handle (1) has a blind hole at one end and is sleeved on the outer circle of the rotating sleeve (5) and fixed relative to the rotating sleeve (5); The connecting pin (4) is fixed in the blind hole on the end face of the upper clutch (7); the through hole on the stepped end face of the rotating sleeve (5) is sleeved on the connecting pin (4); The upper spring (3) is sleeved on the outer circle with the smallest outer diameter of the rotating sleeve (5); A spring stopper 1 (2) is sleeved on the adjusting screw (10) on the side where the upper spring (3) is installed; A lower spring (9) is sleeved on the adjusting screw (10), and one end of the lower spring (9) is in contact with a shaft shoulder (15) of the adjusting screw (10); The spring stopper II (12) is sleeved on the adjusting screw (10) on one side of which the lower spring (9) is mounted, and one end surface of the spring stopper II (12) is in contact with the lower spring (9).

2. The elastic protection tensioning mechanism for a bone saw according to claim 1, characterized in that: The other end of the upper clutch (7) is provided with a fan-shaped boss, the center of which is provided with a circular hole, and the circular hole of the upper clutch (7) is sleeved on the adjusting screw (10).

3. The elastic protection tensioning mechanism of the bone saw according to claim 2, characterized in that: The lower clutch (8) is provided with a fan-shaped boss at one end, a round hole at the other end, and a square hole at the center; the lower clutch (8) is sleeved on the adjusting screw (10) and is located below the upper clutch (7); the side of the lower clutch (8) with the fan-shaped boss is opposite to the side of the upper clutch (7) with the fan-shaped boss; the square hole of the lower clutch (8) is clamped on the square boss (14) of the adjusting screw; and the round hole of the lower clutch (8) is sleeved on the shaft shoulder (15) of the adjusting screw (10).

4. The elastic protection tensioning mechanism for a bone saw according to claim 1, characterized in that: The adjusting screw rod (10) is provided with a pressure regulating nut (13), which is located above the spring retaining pad I (2) and contacts the end surface of the spring retaining pad I (2).

5. The elastic protection tensioning mechanism for a bone saw according to claim 1, characterized in that: A screw hole is provided on the outer circle of the blind hole of the adjustment handle (1), and a screw (6) is connected to the screw hole.

6. The elastic protection tensioning mechanism of a bone saw according to claim 1, characterized in that: A protective sleeve (11) is sleeved on the outer circle of the lower spring (9).

7. The elastic protection tensioning mechanism for a bone saw according to any one of claims 1 to 6, characterized in that: The tensioning mechanism is mounted on a frame (16), a slider (17) is mounted on the frame (16), a threaded hole (171) is provided on one side of the slider (17), and a slot (173) is provided on the other side; one end of the adjusting screw (10) equipped with a lower spring (9) penetrates from the top of the frame (16), and extends downward to be connected with the threaded hole (171) of the slider (17); a driven wheel (18) is mounted in the slot (173), and a saw blade (19) is sleeved on the outer circle of the driven wheel (18).

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