Break-proof structure for probe lead of bearing bush temperature sensor

Abstract

The utility model discloses an anti-fracture structure for a probe lead of a bearing bush temperature sensor. The anti-fracture structure comprises a fixed joint used for connecting the probe and the lead. The pre-tightening spring is sleeved on the lead, one end of the pre-tightening spring is fixedly connected with the fixed joint, and the other end of the pre-tightening spring is fixedly connected with the clamping sleeve; the clamping sleeve is connected to the lead wire; a spiral clamping groove is formed in the outer side of one end of the clamping sleeve, and one end of the pre-tightening spring is clamped and embedded in the spiral clamping groove in a spiral mode; the clamping hoop is located at the spiral clamping groove and detachably clamped and fixed to the outer side of the clamping sleeve. According to the utility model, the probe lead of the bearing bush temperature sensor can be protected, the lead is prevented from being broken, the pre-tightening spring clamping structure is simple, the appearance is attractive, and the completeness of the probe pre-tightening spring in the working process is well protected.

Description

Technical Field

[0001] The utility model relates to the technical field of engine manufacturing, in particular to an anti-breaking structure for a probe lead of a bearing bush temperature sensor. Background Technique

[0002] The main function of the bearing bush temperature sensor of the engine is that the temperature measuring probe measures the temperature at the position where the diesel engine bearing bush is located. The lead wire of the temperature measuring probe uses a polytetrafluoroethylene high-temperature resistant cable wire. The metal material of the cable conductor is silver-plated copper, and the insulating material and the sheath material are both polytetrafluoroethylene, which has oil non-sticking property, high temperature resistance, sliding property, wear resistance and corrosion resistance, and has good mechanical properties. During the operation of the diesel engine, the overall vibration frequency is relatively large, and in actual application, the cable wire is bent, worn and broken. After a long time, it is easy to cause the breakage of the sensor probe lead wire, resulting in no resistance value of the sensor and abnormal output signal, affecting the normal use of the diesel engine. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide an anti-breaking structure for a probe lead of a bearing bush temperature sensor. In order to protect the sensor probe lead wire from being bent and broken, a pre-tightening spring is sleeved outside the probe lead wire, and the pre-tightening spring of the probe can be fixed and clamped. Through double-point support fixation, the probe wire and the pre-tightening spring are effectively fixed, protecting the probe lead wire from being damaged, and the structure is simple and the cost is low, which can effectively solve the problems in the background technique.

[0004] To achieve the above object, the utility model provides the following technical solutions:

[0005] An anti-breaking structure for a probe lead of a bearing bush temperature sensor, comprising a fixed joint for connecting the probe and the lead wire; a pre-tightening spring is sleeved on the lead wire, one end of which is fixedly connected to the fixed joint, and the other end is fixedly connected to a clamping sleeve; the clamping sleeve is connected to the lead wire; a spiral card slot is arranged on the outer side of one end of the clamping sleeve for one end of the pre-tightening spring to be spirally clamped in the spiral card slot; at the position of the spiral card slot, a clamp is detachably clamped and fixed on the outer side of the clamping sleeve.

[0006] As a further optimization, the clamping sleeve is detachably connected to the lead wire, so that the position of the clamping sleeve can be adjusted to make the pre-tightening spring in a compressed state.

[0007] As a further optimization, the clamping sleeve includes a sleeve body, one end of the sleeve body is provided with a tapered head, and a plurality of evenly distributed notches are provided on the circumference for the tapered head to be radially opened or closed through elastic deformation; an external thread is provided on the outer side of the sleeve body, and a locking nut is sleeved on the external thread, and one end of the locking nut is provided with a tapered sleeve that cooperates with the tapered head, so that when the locking nut is tightened, the tapered head is driven to hold the lead tightly, and the sleeve body is fixedly connected to the lead; the spiral card slot is provided at the other end away from the tapered head.

[0008] As a further optimization, an adjusting nut is also connected to the external thread, and the end face of the adjusting nut abuts against the end of the pre-tightening spring.

[0009] As a further optimization, the lead passes through the through hole in the center of the sleeve body, and arc chamfers are provided at the edges of both ends of the through hole.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0011] The present utility model can provide protection for the lead of the bearing bush temperature sensor probe, prevent the lead from breaking, the pre-tightening spring clamping structure is simple, the appearance is beautiful, and the integrity of the probe pre-tightening spring during the working process is well protected. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural diagram of an embodiment of the present utility model;

[0013] Figure 2 is Figure 1 a partial view of

[0014] Figure 3 is a schematic cross-sectional structure diagram of one end of the clamping sleeve in an embodiment of the present utility model;

[0015] Figure 4 is a schematic cross-sectional structure diagram of the other end of the clamping sleeve in an embodiment of the present utility model.

[0016] The reference numerals corresponding to the technical features in the drawings are: clamping sleeve 1; spiral card slot 11; sleeve body 12; tapered head 13; notch 14; locking nut 15; tapered sleeve 16; adjusting nut 17; arc chamfer 18; clamp 2; pre-tightening spring 3; lead 4; fixed joint 5. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The following clearly and completely describes the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings of the present utility model. Obviously, the described embodiments are only some preferred embodiments of the present utility model, rather than all embodiments. Those skilled in the art should understand that these implementation manners are only used to explain the technical principle of the present utility model and are not intended to limit the protection scope of the present utility model.

[0018] Embodiment 1: Please refer to Figures 1-4 ;

[0019] The present utility model provides the following technical solution: An anti-breaking structure for the lead wire of a bearing bush temperature sensor probe, including a clamping sleeve 1 and a clamp 2. A thread groove substantially the same size (slightly larger) as the probe pre-tightening spring 3 is machined on the outer circle of the clamping sleeve 1, and the helix direction of the thread groove is the same as that of the pre-tightening spring 3. During installation, the clamping sleeve 1 is screwed tightly onto the probe pre-tightening spring 3 in a threaded manner; after installation, the clamp 2 is used to lock the outside of the probe pre-tightening spring 3. Arc chamfers 18 are machined on both the inlet and outlet holes of the clamping sleeve 1, effectively protecting the probe pre-tightening spring 3 from being cut during the operation of the diesel engine. The clamp 2 adopts a light pipe clamp 2, and the entire clamping structure is light in weight and beautiful in appearance.

[0020] Thus, it can be seen that this anti-breaking structure at least includes a fixed joint 5 for connecting the probe and the lead wire 4; the pre-tightening spring 3 is sleeved on the lead wire 4, one end of which is fixedly connected to the fixed joint 5, and the other end is fixedly connected to the clamping sleeve 1; the clamping sleeve 1 is connected to the lead wire 4; a spiral card slot 11 is provided on the outside of one end of the clamping sleeve 1 for one end of the pre-tightening spring 3 to be spirally clamped in the spiral card slot 11; at the position of the spiral card slot 11, the clamp 2 is detachably sleeved on the outside of the clamping sleeve 1.

[0021] The pre-tightening spring 3 protects the lead wire 4 from excessive bending. Even in a vibrating environment, neither end of the pre-tightening spring 3 knocks against the lead wire 4, preventing the lead wire 4 from being worn; thereby preventing the lead wire 4 from breaking and improving the reliability and service life of the probe lead wire 4. Among them, the setting of the spiral card slot 11 provides a buffer and transition between the soft spring of the spiral spring and the rigid clamping sleeve 1, and also protects the spring, improving the service life and reliability of the pre-tightening spring 3.

[0022] Preferably, the clamping sleeve 1 is detachably connected to the lead wire 4, so that the clamping sleeve 1 can be adjusted to make the pre-tightening spring 3 in a compressed state. Thus, relying on the elastic force of the pre-tightening spring 3 to digest the energy of vibration and reducing the influence of vibration on the lead wire 4.

[0023] An exemplary detachable structure of a clamping sleeve 1, the clamping sleeve 1 comprises a sleeve body 12, one end of the sleeve body 12 is provided with a cone head 13, and is provided with a plurality of notches 14 evenly distributed around the circumference, so that the cone head 13 can be radially opened or closed through elastic deformation; the sleeve body 12 is provided with an external thread on the outside, a locking nut 15 is sleeved on the external thread, and one end of the sleeve body 12 is provided with a cone sleeve 16 matching the cone head 13, so that when the locking nut 15 is tightened, the cone head 13 holds the lead 4 tightly to fix the sleeve body 12 with the lead 4; the spiral groove 11 is provided at the other end away from the cone head 13. Thus, the clamping sleeve 1 is detachably connected to the lead 4, which is convenient for adjusting the position and driving the preload spring 3 to compress.

[0024] In order to further facilitate the adjustment of the compression amount of the preload spring 3, an adjusting nut 17 is further connected to the external thread, and the end surface of the adjusting nut 17 supports the end of the preload spring 3. It can be seen that when the adjusting nut 17 is rotated, the position of the end of the preload spring 3 can be adjusted, so that the length of the preload spring 3 can be fine-tuned.

[0025] In order to further protect the lead 4, the lead 4 passes through the through hole in the center of the sleeve body 12, and arc chamfers 18 are provided at the edges of both ends of the through hole to prevent the lead 4 from being worn at the edges of the sleeve body 12.

[0026] When in use, the preferred method is to first fix one end of the preload spring 3 on the traditional fixed joint 5; then select to pre-compress the preload spring 3, and then align the spiral groove 11 on the clamping sleeve 1 with the other end of the preload spring 3, and rotate the clamping sleeve 1 so that the end of the preload spring 3 is screwed into the spiral groove 11; then the clamp 2 is put on the spiral groove 11 to press the preload spring 3, but the locking screw of the clamp 2 is not tightened, and then, the locking nut 15 on the clamping sleeve 1 is rotated to clamp the lead 4 so that the sleeve body 12 is fixed; then the adjusting nut 17 is rotated to push the preload spring 3, and under the restriction of the spiral groove 11 and the clamp 2, the preload spring 3 slowly spirals back so that the preload spring 3 is compressed, and then, the locking screw on the clamp 2 is tightened so that the preload spring 3 and the sleeve body 12 are fixedly connected as one, and the installation is completed.

[0027] In summary, this embodiment can provide protection for the bearing temperature sensor probe lead 4 to prevent the lead 4 from breaking. The clamping structure of the preload spring 3 is simple and beautiful in appearance, which can well protect the integrity of the probe preload spring 3 during operation.

[0028] The parts not described in detail in this utility model are prior arts; for those of ordinary skill in the art, the technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as falling within the scope described in this specification. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A structure for preventing the lead of a bearing bush temperature sensor probe from being broken, comprising a fixed joint (5) for connecting the probe and the lead (4); characterized in that: The pre-tightening spring (3) is sleeved on the lead wire (4), one end of which is fixedly connected to the fixed joint (5), and the other end is fixedly connected to the clamping sleeve (1); the clamping sleeve (1) is connected to the lead wire (4). On the outer side of one end of the clamping sleeve (1), there is a spiral slot (11) for one end of the pre-tightening spring (3) to be spirally clamped in the spiral slot (11). At the position of the spiral slot (11), the clamp (2) is detachably clamped and fixed on the outer side of the clamping sleeve (1).

2. The anti-breakage structure of the lead wire of the bearing bush temperature sensor probe according to claim 1, wherein: The clamping sleeve (1) is detachably connected to the lead wire (4) for the position of the clamping sleeve (1) to be adjustable.

3. The anti-breaking structure of the lead wire of the bearing bush temperature sensor probe according to claim 1, characterized in that: The clamping sleeve (1) includes a sleeve body (12), one end of the sleeve body (12) is provided as a tapered head (13), and there are a plurality of evenly distributed notches (14) in the circumferential direction for the tapered head (13) to be radially opened or closed by elastic deformation; an external thread is provided on the outer side of the sleeve body (12), and a locking nut (15) is sleeved on the external thread, and one end of the locking nut (15) is provided with a tapered sleeve (16) that cooperates with the tapered head (13) for driving the tapered head (13) to hold the lead wire (4) tightly when the locking nut (15) is tightened, so that the sleeve body (12) is fixedly connected to the lead wire (4); the spiral slot (11) is provided at the other end far from the tapered head (13).

4. The anti-breaking structure of the lead wire of the bearing bush temperature sensor probe according to claim 3, characterized in that: An adjusting nut (17) is also connected to the external thread, and the end face of the adjusting nut (17) abuts against the end of the pre-tightening spring (3).

5. The anti-breaking structure of the lead wire of the bearing bush temperature sensor probe according to claim 3, characterized in that: The lead wire (4) passes through the through hole in the center of the sleeve body (12), and arc chamfers (18) are provided at the edges of both ends of the through hole.

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