Tensioning device, air conditioner compressor transmission system and engineering machinery

Abstract

The utility model discloses a tensioning device, an air conditioner compressor transmission system and engineering machinery, the upper part of a rotating bracket is hinged with the upper part of a fixed bracket, and the rotating bracket can rotate around a hinge point; the right-hand thread knuckle bearing connecting rod comprises a rod part and a bearing part, and the bearing part is hinged to the lower end of the rotating support. The left-hand thread knuckle bearing connecting rod comprises a rod part and a bearing part, and the bearing part is hinged to the lower end of the fixing support; one end of the positive and negative thread adjusting long nut is in threaded connection with the rod part of the positive thread joint bearing connecting rod, the other end of the positive and negative thread adjusting long nut is in threaded connection with the rod part of the negative thread joint bearing connecting rod, and the positive and negative thread adjusting long nut is rotated in the positive or negative direction to enable the positive and negative thread joint bearing connecting rods to move in the opposite direction or back direction; and then the rotary support is driven to rotate towards or away from the fixed support, and the problem that the tensioning efficiency is low is solved.

Description

Technical Field

[0001] This utility model relates to a tensioning device and belongs to the field of belt tensioning technology. Background Technology

[0002] The drive belt of the excavator's air conditioning compressor is tensioned by installing a tensioning device. Existing tensioning devices generally achieve belt tensioning through a single adjusting bolt, which has the problem of low tensioning efficiency.

[0003] The first publicly disclosed technical solution is a tensioning device for the transmission belt of an excavator air conditioning compressor (CN202901189U). It uses a single tensioning bolt to hold the fixed bracket in place and adjusts the bolt to achieve belt tension. However, the tensioning efficiency is low. Since the tensioning bolt can swing left and right around its contact point with the fixed bracket and there is vibration between the power source (such as the engine) and the compressor itself, the fixed connection lug of the fixed bracket and the rotating bracket is subjected to excessive load under the tension of the transmission belt when the device is installed on the side. This can lead to deformation and breakage, which in turn can cause the compressor to malfunction.

[0004] The second disclosed technical solution: A vehicle air conditioning compressor mounting device (CN202348621U) achieves belt tensioning by tightening a locking nut, causing the adjusting bolt to move relative to the hole in the transition block. However, due to the transmission belt acting on the side during tensioning, excessive friction between the transition block and the adjusting bolt occurs during tightening the locking nut, posing a risk of damage to the adjusting bolt's threads and thus preventing tensioning. This device also achieves belt tensioning through a single adjusting bolt, resulting in low tensioning efficiency. Summary of the Invention

[0005] To address the aforementioned issues, this invention can improve belt tensioning efficiency while enhancing the reliability and stability of the air conditioning compressor drive belt tensioning device.

[0006] This utility model is achieved according to the following technical solution:

[0007] In a first aspect, this utility model provides a tensioning device, comprising:

[0008] Fixed bracket;

[0009] A rotating bracket, the upper part of which is hinged to the upper part of the fixed bracket, is capable of rotating around the hinge point;

[0010] A threaded spherical plain bearing connecting rod includes a rod portion and a bearing portion, wherein the bearing portion is hinged to the lower end of the rotating bracket;

[0011] A reverse-threaded spherical bearing connecting rod includes a rod portion and a bearing portion, wherein the bearing portion is hinged to the lower end of the fixed bracket;

[0012] The adjusting nut with positive and negative threads has one end threadedly connected to the rod of the positive thread spherical bearing connecting rod, and the other end threadedly connected to the rod of the negative thread spherical bearing connecting rod. Rotating the adjusting nut with positive and negative threads in the forward or reverse direction causes the positive and negative thread spherical bearing connecting rods to move towards or away from each other, thereby driving the rotating bracket to rotate towards or away from the fixed bracket.

[0013] In some embodiments, each of the rod portion of the positive thread spherical bearing connecting rod and the rod portion of the negative thread spherical bearing connecting rod has at least one locking nut, which is pressed against the positive and negative thread adjusting long nut to fix the positive and negative thread adjusting long nut together with the positive and negative thread spherical bearing connecting rods.

[0014] In some embodiments, the fixed bracket is provided with an ear plate I with a sliding hole on its upper side, and the side plate I of the rotating bracket is provided with a through hole arranged opposite to the sliding hole. The sliding component cooperates with the through hole and the sliding hole to realize the sliding connection between the fixed bracket and the rotating bracket, and the sliding component is limited by the sliding hole, thereby limiting the rotation angle of the rotating bracket.

[0015] In some embodiments, the sliding component includes a bolt and a nut, the bolt passing through the through hole and the sliding hole, and the nut being screwed onto the bolt to limit its axial movement.

[0016] In some embodiments, the fixed bracket is provided with an ear plate II arranged opposite to the ear plate I, and the rotating bracket is provided with a side plate II arranged opposite to the side plate I; each of the ear plate I, ear plate II, side plate I and side plate II is provided with a bolt hole arranged coaxially, the bolt passes through the four bolt holes, and the nut is screwed on the bolt to limit its axial movement.

[0017] In some embodiments, the sleeve passes through the bolt holes of the side plate I and the side plate II and is fixed together with the side plate I and the side plate II; the pin sleeve passes through the bolt hole of the ear plate II to eliminate the fitting gap between the fixed bracket and the rotating bracket, and the bolt passes through the sleeve and the pin sleeve.

[0018] In some embodiments, both the fixed bracket and the rotating bracket are provided with a hinge seat consisting of two oppositely arranged ear plates, and the bearing portion of the positive and negative threaded spherical bearing connecting rod is connected to the corresponding hinge seat by bolts and nuts.

[0019] Secondly, this utility model provides an air conditioning compressor transmission system, comprising:

[0020] In the aforementioned tensioning device, the fixed bracket is mounted on the power source;

[0021] The compressor is mounted on the rotating bracket;

[0022] A transmission belt is fitted between the drive wheel on the power source and the driven wheel on the compressor.

[0023] In some embodiments, the rotating bracket is provided with multiple threaded seats, and multiple bolts are respectively passed through the mounting holes on the compressor and tightened onto the threaded seats.

[0024] Thirdly, this utility model provides an engineering machinery, including the above-mentioned tensioning device; or, including the above-mentioned air conditioning compressor transmission system.

[0025] The beneficial effects of this utility model are:

[0026] 1. By using spherical bearings to distribute the load generated during belt tensioning and transmission, the problem of excessive load on the ear plate with sliding holes leading to deformation and breakage is solved, and the risk of damage to the threads of the adjusting bolt is also avoided.

[0027] 2. The belt tensioning is achieved by using a long adjusting nut with positive and negative threads and a connecting rod with positive and negative thread spherical bearings, thus solving the problem of slow tensioning efficiency.

[0028] 3. The fixed connection between the fixed bracket and the rotating bracket, the installation positions of the positive and negative threaded adjusting long nuts and the two joint bearing connecting rods are distributed in the upper left and lower right directions to solve the problem of vibration and poor stability of the air conditioner compressor drive belt tensioning device. Attached Figure Description

[0029] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0030] In the attached diagram:

[0031] Figure 1 This is an exploded view of the tensioning device of this utility model;

[0032] Figure 2 This is a top view of the tensioning device of this utility model;

[0033] Figure 3 This is a schematic diagram illustrating the adjustment principle of the tensioning device of this utility model;

[0034] Figure 4 This is a perspective view of the air conditioning compressor transmission system of this utility model.

[0035] Attached diagram labels: 1. Drive wheel; 2. Drive belt; 3. Tensioning device; 4. Compressor; 5. Bolt; 6. Rotating bracket; 7. Bolt; 8. Washer; 9. Threaded spherical plain bearing connecting rod; 10. Locking nut; 11. Threaded adjusting long nut; 12. Locking nut; 13. Threaded spherical plain bearing connecting rod; 14. Bolt; 15. Washer; 16. Fixed bracket; 17. Bolt; 18. Washer; 19. Bolt; 20. Washer; 21. Pin sleeve; 22. Nut; 23. Nut; 24. Ear plate I.

[0036] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0038] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] like Figure 1 , Figure 2 , Figure 3As shown, a tensioning device includes a fixed bracket 16, a rotating bracket 6, a positive thread spherical bearing connecting rod 9, a negative thread spherical bearing connecting rod 13, and a positive / negative thread adjusting nut 11. The upper part of the rotating bracket 6 is hinged to the upper part of the fixed bracket 16, and the rotating bracket 6 can rotate around the hinge point. The positive thread spherical bearing connecting rod 9 includes a rod part and a bearing part, and the bearing part is hinged to the lower end of the rotating bracket 6. The negative thread spherical bearing connecting rod 13 includes a rod part and a bearing part, and the bearing part is hinged to the lower end of the fixed bracket 16. One end of the positive / negative thread adjusting nut 11 is threaded to the rod part of the positive thread spherical bearing connecting rod 9, and the other end is threaded to the rod part of the negative thread spherical bearing connecting rod 13. Rotating the positive / negative thread adjusting nut 11 in the forward or reverse direction causes the positive and negative thread spherical bearing connecting rods 9 and 13 to move towards or away from each other, thereby driving the rotating bracket 6 to rotate towards or away from the fixed bracket 16.

[0041] It should be noted that the positive and negative thread adjusting nut 11 is used to connect both the positive thread spherical bearing connecting rod 9 and the negative thread spherical bearing connecting rod 13, as follows: Figure 3 As shown, the travel of the rotating bracket 6 around the bolt 17 is increased, improving the tensioning efficiency. The connection between the fixed bracket 16 and the rotating bracket 6, and the installation positions of the positive and negative thread adjusting nut 11, the positive thread spherical bearing connecting rod 9, and the negative thread spherical bearing connecting rod 13 are distributed in the upper left and lower right directions, solving the problem of vibration and poor stability of the air conditioning compressor drive belt tensioning device.

[0042] Further options, such as Figure 1 , Figure 2 As shown, each of the rods of the positive thread spherical plain bearing connecting rod 9 and the negative thread spherical plain bearing connecting rod 13 has at least one locking nut 10 and 12. The locking nuts 10 and 12 are pressed against the positive and negative thread adjusting long nut 11, fixing the positive and negative thread adjusting long nut 11 to the positive and negative thread spherical plain bearing connecting rods 9 and 13 together.

[0043] Further options, such as Figure 1 , Figure 2 As shown, both the fixed bracket 16 and the rotating bracket 6 are provided with a hinge seat consisting of two oppositely arranged ear plates. The bearing parts of the positive and negative threaded spherical bearing connecting rods 9 and 13 are connected to the corresponding hinge seats by bolts 7 and 14, washers 8 and 15, and nuts.

[0044] Further options, such as Figure 1 , Figure 2As shown, the fixed bracket 16 has an ear plate I 24 with a sliding hole on its upper side, and the rotating bracket 6 has a through hole arranged opposite to the sliding hole on its side plate I. The sliding component cooperates with the through hole and the sliding hole to realize the sliding connection between the fixed bracket 16 and the rotating bracket 6, and limits the sliding component through the sliding hole, thereby limiting the rotation angle of the rotating bracket 6.

[0045] It should be noted that the lower end of the rotating bracket 6 and the positive thread spherical bearing connecting rod 9 are hinged by bolt 7, and the lower end of the fixed bracket 16 and the negative thread spherical bearing connecting rod 13 are hinged by bolt 14. The spherical bearings are used to share the load generated during belt tensioning and transmission, thus solving the risk of deformation and breakage of the ear plate I24 with sliding hole due to excessive load.

[0046] Preferred solutions, such as Figure 1 , Figure 2 As shown, the sliding component includes a bolt 19, a washer 20, and a nut. The bolt 19 passes through the washer 20, the through hole, and the sliding hole. The nut 23 is screwed onto the bolt 19 to limit its axial movement.

[0047] Further options, such as Figure 1 , Figure 2 As shown, the fixed bracket 16 is provided with an ear plate II arranged opposite to the ear plate I 24, and the rotating bracket 6 is provided with a side plate II arranged opposite to the side plate I; each of the ear plate I 24, ear plate II, side plate I and side plate II is provided with a bolt hole arranged coaxially, and the bolt 17 passes through the washer 18 and the four bolt holes, and the nut 22 is screwed on the bolt 17 to limit its axial movement.

[0048] Preferred solutions, such as Figure 1 , Figure 2 As shown, the sleeve passes through the bolt holes of side plate I and side plate II and is fixed together with side plate I and side plate II; the pin sleeve 21 passes through the bolt hole of ear plate II and is used to eliminate the fitting gap between the fixed bracket 16 and the rotating bracket 6; the bolt 17 passes through the washer 18, the sleeve and the pin sleeve 21.

[0049] like Figure 4 As shown, this utility model also provides an air conditioning compressor transmission system, including the above-mentioned tensioning device 3, compressor 4 and transmission belt 2; fixed bracket 16 is installed on the power source; compressor 4 is installed on the rotating bracket 6; transmission belt 2 is fitted between the drive wheel 1 on the power source and the driven wheel on the compressor 4.

[0050] Further options, such as Figure 4 As shown, the rotating bracket 6 is provided with multiple threaded seats, and multiple bolts 5 are respectively inserted into the mounting holes on the compressor 4 and tightened onto the threaded seats.

[0051] The following describes the usage and adjustment process of the above tensioning device:

[0052] Step 1: First, install the fixed bracket (16) on the power source (such as an engine), and press... Figure 1 As shown, first assemble the tensioning device 3. Note that nuts 10, 12, 22, and 23 should not be tightened to ensure that the rotating bracket 6 can rotate relative to bolt 17.

[0053] Step 2: Fix the compressor 4 to the threaded seat on the rotating bracket 6 with bolt 5, connect the transmission belt 2, use a wrench to rotate the forward and reverse thread adjusting nut 11 until the transmission belt 2 reaches the appropriate tension, and tighten nuts 10, 12, 22, and 23 in sequence.

[0054] When the belt tension needs to be adjusted again, loosen the locking nuts 10, 12, 22, and 23 in sequence, rotate the adjusting long nut 11 with the positive and negative threads to the transmission belt 2 to the appropriate tension, and then tighten the locking nuts 10, 12, 22, and 23 in sequence.

[0055] In summary, this utility model provides a tensioning device that achieves the following functions and effects:

[0056] 1. By using spherical bearings to distribute the load generated during belt tensioning and transmission, the problem of excessive load on the ear plate with sliding holes leading to deformation and breakage is solved, and the risk of damage to the threads of the adjusting bolt is also avoided.

[0057] 2. The belt tensioning is achieved by using a long adjusting nut with positive and negative threads and a connecting rod with positive and negative thread spherical bearings, thus solving the problem of slow tensioning efficiency.

[0058] 3. The fixed connection between the fixed bracket and the rotating bracket, the installation positions of the positive and negative threaded adjusting long nuts and the two joint bearing connecting rods are distributed in the upper left and lower right directions to solve the problem of vibration and poor stability of the air conditioner compressor drive belt tensioning device.

[0059] The following describes the engineering machinery provided by this utility model. The engineering machinery described below can be referred to in correspondence with the air conditioning compressor transmission system described above.

[0060] The engineering machinery provided by this utility model may include the air conditioning compressor transmission system as described in any of the above embodiments.

[0061] The beneficial effects achieved by the engineering machinery provided by this utility model are consistent with the beneficial effects achieved by the air conditioning compressor transmission system provided by this utility model, so they will not be repeated here.

[0062] It should be noted that the aforementioned construction machinery can be excavators.

[0063] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0064] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features found in other embodiments but not others, combinations of features from different embodiments are also within the scope of protection of this invention and form different embodiments. For example, in the embodiments described above, those skilled in the art can use them in combination based on known technical solutions and the technical problems to be solved by this application.

[0065] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A tensioning device, characterized in that It comprises: a fixed support; a rotating support, the upper part of which is hinged to the upper part of the fixed support, and the rotating support can rotate around the hinge point; a right-threaded spherical bearing connecting rod, comprising a rod part and a bearing part, the bearing part being hinged to the lower end of the rotating support; a left-threaded spherical bearing connecting rod, comprising a rod part and a bearing part, the bearing part being hinged to the lower end of the fixed support; a right-left-threaded adjusting long nut, one end of which is screwed to the rod part of the right-threaded spherical bearing connecting rod, and the other end is screwed to the rod part of the left-threaded spherical bearing connecting rod, and rotating the right-left-threaded adjusting long nut in the right direction or the left direction can make the right-threaded spherical bearing connecting rod and the left-threaded spherical bearing connecting rod move towards each other or away from each other, and then drive the rotating support to rotate towards or away from the fixed support.

2. The tensioning device according to claim 1, characterized in that: the rod part of the right-threaded spherical bearing connecting rod and the rod part of the left-threaded spherical bearing connecting rod each have at least one locking nut, and the locking nut is in abutment with the right-left-threaded adjusting long nut to fix the right-left-threaded adjusting long nut and the right-threaded spherical bearing connecting rod and the left-threaded spherical bearing connecting rod together.

3. The tensioning device according to claim 1, characterized in that: the upper side of the fixed support is provided with an ear plate I with a sliding hole, and the side plate I of the rotating support is provided with a round through hole arranged opposite to the sliding hole, and a sliding part is matched with the round through hole and the sliding hole to realize the sliding connection of the fixed support and the rotating support, and the sliding hole limits the sliding part to limit the rotation angle of the rotating support.

4. The tensioning device according to claim 3, characterized in that: the sliding part comprises a bolt and a nut, the bolt is arranged in the round through hole and the sliding hole, and the nut is screwed on the bolt to limit the bolt in the axial direction.

5. The tensioning device according to claim 3, characterized in that: the fixed support is provided with an ear plate II arranged opposite to the ear plate I, and the rotating support is provided with a side plate II arranged opposite to the side plate I; the ear plate I, the ear plate II, the side plate I and the side plate II are each provided with a coaxially arranged bolt hole, a bolt is arranged in the four bolt holes, and a nut is screwed on the bolt to limit the bolt in the axial direction.

6. The tensioning device according to claim 5, characterized in that: a sleeve is arranged in the bolt holes of the side plate I and the side plate II, and is fixed with the side plate I and the side plate II; a pin shaft sleeve is arranged in the bolt hole of the ear plate II to eliminate the fitting gap between the fixed support and the rotating support, and the bolt is arranged in the sleeve and the pin shaft sleeve.

7. The tensioning device according to claim 1, characterized in that: the fixed support and the rotating support are each provided with a hinge seat composed of two oppositely arranged ear plates, and the bearing parts of the right-threaded spherical bearing connecting rod and the left-threaded spherical bearing connecting rod are connected together through a bolt and a nut between the corresponding hinge seats.

8. An air conditioner compressor drive system characterized by comprising: It comprises: the tensioning device according to any one of claims 1 to 7, and the fixed support is mounted on a power source; a compressor mounted on the rotating support; a transmission belt sleeved between a driving wheel on the power source and a driven wheel on the compressor.

9. The air compressor drive system of claim 8, wherein: a plurality of threaded seats are provided on the rotating bracket, and a plurality of bolts are respectively screwed in the mounting holes on the compressor and then screwed in the threaded seats.

10. A working machine, comprising: the tensioning device according to any one of claims 1 to 7; or the air compressor drive system according to claim 8 or 9.

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